2010年8月3日星期二

What is Working Principle of Laser Pointers

laser green,laser pointer,laser pointers,laser pointer pen,portable lasers,green lasers,200mw green laser pointers,jetlasersTo understand working principle of laser pointers, one must understand a bit about the light emission and absorption properties of atoms, as well as the electronic structure in atoms. Every atom has a nucleus with electrons revolving around it at different distances. The electrons are bound to the nucleus by the electrical attraction, that exists between positive protons in the nucleus and the negatively charged electrons.
The name 'LASER' is actually an acronym that stands for 'Light Amplification by Stimulated Emission of Radiation'. The answer to how lasers work, is right in its name itself. Lasers work through light amplification, achieved by the quantum mechanical phenomenon of stimulated emission.

You will find lasers everywhere today. Right from CD and DVD reader/writers to industrial and surgical applications, lasers are used in many fields of human endeavor. This article is a short introduction to show working principle of laser pointers.

The electrons are in specific and well defined orbits, while revolving around the nucleus. These well defined orbits have specific energy associated with them. One can think of these energy levels as steps on a ladder, which are not equally spaced however. Each higher step on the energy ladder has higher energy than the one below. The first few steps on this energy ladder are the ground states and all the next ones are 'excited energy'. These orbits are not well defined but spread out in space due to the uncertainty principle of quantum physics. That is, we cannot say where exactly an electron is, but only calculate probabilities of it being in an energy level which is spread out in space. There is a fuzzy cloud of electrons around the nucleus. This is called the electron cloud model.Electrons keep hopping between these energy steps or levels. Read more on:
The laser working principle is based on the concept of population inversion and stimulated emission. As I said before, normally very few atoms have electrons in the excited state. Population inversion is all about inverting the population of electrons in ground states, so that maximum electron have atoms in the excited state. This is achieved by bombardment of photons on the atoms, so that many electrons absorb energy and rise to higher excited states. It is known as pumping.
Stimulated emission, unlike spontaneous emission is biasing the probability of electron transition to lower states, causing emission of photons. It is achieved by bombarding of atoms with photons, which have exactly the same energy, as difference between the transition energy levels. To get a monochromatic and coherent light output from a bunch of atoms, many electrons need to be in a specific excited state at the same time and they must make the transition to a lower state, in unison! The light output is monochromatic or single wavelength, as all the atoms emit photons of same energy and it's coherent as the photon emissions occur in unison!
Now that I have given you some idea about the laser working principles, let us have a look at the working of laser and laser pointer. A laser consists of a 'Gain Medium', placed in a resonant cavity, with facility for pumping the gain medium. The gain medium also known as 'lasing medium' is a bunch of atoms, molecules or a mixture of atoms selected according to the wavelength of laser light that is needed. The gain medium is selected after studying spectroscopic emission properties of various atoms. A resonant cavity is an enclosure with reflecting mirror on one side and semi reflecting mirror on the other side. The gain medium is first pumped, that is the atoms are excited by bombardment of photons. These atoms have electrons in excited states which emit photons. These photons keep bouncing around in the gain medium, as they are reflected due to the mirrors. This causes stimulated emission, which increases the number of excited electrons. When these electrons get deexcited, they release photons of the same energy and wavelength. This creates a concentrated, monochromatic output of photons, which escapes out of the semi-silvered mirror, giving a laser output! This light beam can be concentrated by the usage of lenses, giving it directionality, which is a feature of laser light.
According to the lasing medium, the wavelength of laser output changes. There are many types of lasers, differentiated by the gain medium used. Hope this article has given you a rough idea of how does a laser work and provide a monochromatic, coherent and directional light output. To fully understand how lasers work in detail, one must understand some concepts of quantum mechanics and a lot of electronics.

2010年7月23日星期五

What was the cause of the blue laser pointers much more expensive?

blue laser pointers, jet lasers, jetlasers, titanium laser pointers, waterproof laser pointersBoth blue laser pointers and green laser pointers use a pump diode that gives out infrared 808nm light that is used to pump the same type of crystals. The pumped crystals in turn give out light in the far infrared spectrum. The difference between blue lasers and green lasers is the optical coatings on the pumped crystals and the type of far infrared light produced by these crystals.
The pumped crystals in a green laser pointer have an optical coating that causes the crystals to give out mostly 1064nm infrared light that is frequency doubled by another crystal to green 532nm light. The pumped crystals in a blue laser pointer have a different coating that causes the crystals to give out mostly 946nm infrared light that is also frequency doubled by another crystal to 473nm light.
The process of producing 1064nm light is much more efficient than making 946nm light so blue laser pointers need a large pump diode to produce the same power. The larger pump diode makes blue laser pointers more expensive. The frequency doubling crystals in blue laser pointers are rarer and more expensive than those in green laser pointers.

It is not just blue laser pointers that are more expensive. Blue laser modules, OEM blue lasers and blue lab lasers are also much more expensive than their green counterparts. The reason for such a large price differences are the processes used to generate the laser beam, the components used that the manufacturing volumes.

Green laser pointers have better visibility than blue laser pointers and have less temperature problems at higher power levels. This means that green lasers are used for a larger number of diverse applications such as astronomy, pointing, burning and signaling and are manufactured in very high volumes. Blue laser pointers on the other hand are much more limited in their application and are manufactured in much lower volumes. Like any product, the lower the volume produced, the more expensive the product is.

2010年7月15日星期四

150mw green titanium laser pointer beam

200mw titanium green laser pointer,150mw titanium green laser pointer,100mw waterproof red laser pointers,jetlasers 150mw titanium green laser pointerA laser pointer is a small device that emits light beam used to highlight different objects in a presentation. This tool has been used to replace the usual stick or extendable metal rods that are being used to point at objects. All titanium laser pointers are much advantageous when it comes to effortlessly pointing at object that is too high or too far. The beam of the laser can point to anywhere unlike the stick or rod which has a limited reach.
Laser pointers use the laser technology where a light is amplified using battery power. At present, laser pointer batteries are rechargeable like CR123 or 18650 battery. The lights of pointers’ laser available today are 473nm, 405nm, 650nm, 980nm,1064nm,808nm and the most common 532nm green beam. Now, green laser pointer is the widely used color of laser because of its high visibility where you can clearly see the light of the beam being produced. Compared to the yellow light which may diffuse, green light can be more stable when it comes to temperature and background light. Green laser pointer has a high frequency having the wavelength of up to 532nm that is powerful enough to become very visible. Other high frequency laser beams available in the market today are violet and blue. You can still find red or red-orange beams that is more powerful that its ancestors.
When choosing a laser pointer, you can look at different strengths and according to the need. These laser pointers beams can be hazardous to the eye but the good news is that most of the product designs of laser pointer today are created with safety features. If you want something that you can use as light or just a toy then you can choose the 532nm 150mw titanium green laser pointer. But if you want something that you can use in parties, you can have the powerful lasers such as green, red, blue, and violet. But be responsible in using it because pointing it to the eye of person may cause blindness or eye defect. Moreover, the eye injury caused by laser irradiation is cumulative, so even the little injury is not obvious enough, but don't wait until it's too late. You must wear the laser safety goggles when operate these lasers and encounter these lasers beams.

2010年7月14日星期三

Surprising Laser Safety Goggles for Laser Pointers

laser safety goggles,goggles,green laser goggles,red laser goggles,532nm laser safety goggles,650nm laser googlesThe laser pointer is made to highly gather the energy and power at the focus within seconds, while our eyes lens also functions as focusing; all combines to make the power in the unit area shot at the retina increases nearly one million times. Laser has great monochromaticity and thus shows little chromatic aberration within the optical fundus, because the pulsed laser injury speed is much faster than the blink reflex: generally speaking, the blink reflex time of human eyes is 150-250ms, while the response of pulsed laser can be as short as 10-6s and even 10-12 S level. Because pulsed laser injury is much faster than the blink reflex. Human eyes are the most sensitive organ of the human body, Coupled with a extremely short moment, in a extremely small area, the extremely intense release of the ultra concentration of the energy and power, no wonder even the low doses of laser irradiation may also cause serious damage on the cornea or retina. Moreover, the eye injury caused by laser irradiation is cumulative, so even the little injury is not obvious enough, but don't wait until it's too late.
Laser Safety Goggles applies the optical absorption principle: its target light source is not selective, and one can nearly block any diffused light radiated from the laser; the incident angle of the light source is not selective either and they receive the equally efficient protection. With faster light reaction and higher damping decrement, these goggles are also anti-wear, and even there is any scratch, the laser safety is not affected.
The JetLasers laser safety goggle is the synthesis of PC and Australia imported light absorbing materials of specific wavelengths. It's highly effective, explosion-proof, and eyes protective.Laser safety goggles can protect human eyes from laser pointer beam.
The laser safety goggle is highly effective, explosion-proof, and eyes protective. Laser safety goggle is light weighted, high in toughness and unbreakable, and has been widely recognized and recommended by international security organizations and laser users. Completely meeting the safety requirements of GJB1762-93 "laser protective glasses physical health standards," and it's very comfortable, beautiful and reliable.

2010年7月12日星期一

Non Lethal Deterrent--Green Laser Dazzler

green laser dazzler,300mw green laser dazzler,400mw laser dazzlers,500mw green laser dazzler,jetlasers green laser dazzler,non lethal laser dazzlerIn a recent response to the value of laser dazzler as means of non lethal deterrent and saving lives, the US army Rapid Equipping Force at Fort Belvoir Va has expedited the shipment of 2000 high power laser pointers to soldiers in Baghdad, Iraq.
In terms of their use, a common dilemma often faced by soldiers deployed in Iraq and Afghanistan is how to warn/deter suspicious or aggressively driven vehicles that are approaching their checkpoint or convoy operations with out using potentially lethal force. This is particularly a problem during night operations when identification is more difficult. Laser dazzlers have been especially useful in this regard as a means of non lethal deterrent.
The use of laser dazzlers in combat zones is not just limited to fixed positions and vehicles. Military personnel out on patrol or in the field have also used high power laser pointers as a non lethal means of deterrent. This use is clearly illustrated from a soldiers records of a Baghdad night patrol on Route Michigan.

Non lethal laser dazzler is one of many military personal who privately purchased a high power laser pointer.Enlarge US and coalition military forces in Iraq and Afghanistan are employing high power laser pointers as means of non lethal deterrent and saving lives. Laser dazzler or green laser dazzler though are a new form of technology and are not yet standard military issue. Due to their immense value in combat situations, military personnel and their families are regularly buying green laser dazzlers and high power laser pointer at their own expense.

The importance of laser dazzlers in saving lives is also acknowledged by the Department of Defence . When you consider the alternative which is a bullet, I honestly believe you can use laser dazzler; you can use them effectively. These high powered laser pointers are commercially available and are normally purchased by military personnel and their families online. In situations when lives are at stake, it is essential for the laser dazzler to be effective.

2010年7月11日星期日

Skin Conditions Treated by Lasers

100mw green laser pointers,150mw red laser pointer,200mw green laser pointer pen,jetlasersThe most common use of laser in dermatology is in the treatment of vascular lesions using lasers. It was used primarily for treating port wine stains in children. However, with modifications of the initial parameters which allow longer pulses and wavelengths, it is increasingly being used in the treatment of blood vessel diseases and also for epidermal cooling. Smaller superficial vascular malformations respond better than treatment of deeper, larger blood vessels with an approximate 80% fading after 8 to 10 treatments. Most of lasers in dermatology and skin conditions treated include 473nm lasers,532nm lasers,635nm lasers,650nm lasers,671nm lasers,980nm lasers and 1064nm lasers,etc. These lasers have also been used to remove viral warts, acne and psoriasis. Keloids and hypertrophic scars, which have been traditionally difficult to remove, can be eradicated by vaporising lasers like carbon dioxide and erbium.

Unwanted hair can be effectively removed or reduced using lasers such as 635nm lasers or 1064nm lasers. These lasers target the melanin within the hair shaft and bulb causing the destruction of cells. This results in the slowing down the ability of hair growth.

Laser resurfacing allows the collagen in the skin to be rebuilt, making a patient look younger by reducing the wrinkles in the skin. The most commonly used noninvasive device, green lasers or red lasers emitting diodes have been used to stimulate the fibroblasts in the skin to produce collagen, elastin and glycosaminoglycans to rejuvenate the skin.

It is important that the anybody using laser devices should be thoroughly trained and the patients and the clinic staff be given eye protection. You must be wearing laser safety goggles or protective goggles. Patients should keep in mind that laser treatments are basically burns, which can cause temporary pain, infection and redness. Understanding the inherent risks and complications is crucial. So, before going for a laser treatment, please consult a qualified laser surgeon.

2010年7月2日星期五

Marvelous Titanium Products

titanium green laser pointer,titanium 200mw green laser pointers,titanium laser pointer pens,titanium portable lasersTitanium is used in condensers and turbine blades in electric power plants. It is also incorporated into the architecture of buildings, roofs, piping and cable. Titanium also is valued in the petrochemical industry, where it is used in heat exchangers and reactors. The automotive industry uses it in automotive components including connecting rods, valves, and suspension springs. The sporting goods industry uses the metal in the manufacture of bicycles, golf clubs, tennis rackets, and wheelchairs designed for disabled people who want to participate in a sport.

http://www.jetlasers.org/ provides the titanium 5mw to 200mw blue violet laser pointer and titanium 5mw to 30mw portable blue lasers, 5mw-250mw titanium green laser and titanium portable red lasers.

Because of its corrosion resistance, titanium and its alloys are used extensively in prosthetic devices such as artificial heart pumps, pacemaker cases, heart-valve parts and load bearing bone or hip-joint replacements or bone splints. Human body fluids are essentially chloride brines with pH values ranging from 7.4 into the acidic range and also contain a variety of organic acids and other media, to which titanium is totally immune.
Since titanium does not become magnetized, it is used in the structural parts surrounding computer components such as disk drives and microchips, which can be ruined by stray magnetism. Other common applications of titanium include shape memory eyeglass frames, watches and jewelry.

2010年7月1日星期四

Fascinating All Titanium laser pointer

titanium green laser pointer,titanium laser pointers,titanium portable laser,100mw titanium green laser pointerTitanium is used in automobiles, aerospace applications, buildings, sporting equipment and laser making. Titanium's physical qualities of high strength, toughness, durability, low density, corrosion resistance and biological compatibility make it useful in a variety of applications.

The Jetlasers all titanium laser pointers incorporate the nLight laser diode of high output, high efficiency separate crystal assembly (about double the heat transfer capability and efficiency of ordinary laser pointers and portable lasers) and most robust design. Jetlasers manufactures all titanium laser pointers, ir filtered titanium green laser pointers, all titanium waterproof laser pointer pens, titanium green laser pointers, Ti laser pointer pens green, jetlasers titanium lasers portable, titanium green laser pointers red, 100mw titanium green laser pointer pens, etc.

2010年5月19日星期三

The Revolutionized Laser Pointers – All Titanium Waterproof Lasers

jetlasers,green laser pointer, green lasers DIY work on laser pointers are common, but it's much beyond a laser hobbyist's ability to revoluntionize the construction, duty cycle and stability of a high-end laser pointer.
It’s no doubt that most laser hobbyists often google search and seek any new laser products online, and also often are upset by the old design and repetitive features built in the existing laser pointers or portable lasers.
Until they stumble upon the all titanium laser pointers , every feature of which can cause a sensation. Simply the using of the all titanium shell is a breakthrough in the laser tech, along with its incorporation of the military-grade water resistant feature, its shocking anti-shock construction, its intelligent and adjustable focusing mechanism, as well as its consistent design.
That’s why a lot of reviewers are crazy about this revoluntionized laser pointer model and recommend jetlasers all titanium laser pointers as a work of art rather than mere laser products.

250mw PGL Power (IR Filtered) Test from Jetlasers

2010年5月18日星期二

Soccer Terms

I guess it would be safe to say that more countries in the world follow soccer than any other sport in the world. Mostly because soccer is one of the simplest games in the world to understand as well as to play. Soccer also requires very little equipment, so all you need to do is to pop out on to the field with a bunch of friends and start playing! But before you start, and assuming that you do not know the game, it would be a pretty good idea for you to go through these basic soccer terms, the meaning of which any footballer ought to know about! So, here are some of the basic soccer terms and rules explained.Instead of clumping all the soccer terms together, in this article, I will be classifying them into the following categories which I feel they belong to.


Soccer Terms Related to Player Positions
Soccer Terms Related to Player Formation
Soccer Terms Related to Pitch Dimensions
Other Basic Soccer Terms And Rules


Soccer Terms Related to Player PositionsGoalkeeperThe goalkeeper is the player in soccer who guards the goal. The goalkeeper is also the only player on the pitch who is allowed to touch the ball with his hands in the penalty area. DefendersDefenders are the players who are basically responsible for stopping the opposition team from scoring. Defenders are usually split into center backs and full backs.Full-backsFull-backs or wing-backs are players that play on the right and left flanks of the defense. They generally are entrusted with two tasks. The first is to ensure that the attacking players from the wide ends of the pitch are dealt with and the second is to bring the ball forward to facilitate attacking play. The right-back is the full back who plays on the right of the two center-backs and the left back plays on the left of the two center-backs.Center-backsCenter-backs or center-halves or central defenders generally form the heart of the defense. They are positioned in the center of the defense line and they are given the task of stopping the opposition attackers from running at the goal and scoring. Most teams today play with two center-backs, although there was a time when the just the one center-back (then known as a 'sweeper').MidfieldersThe midfielders are the players that play in the center of the field between the defense and the attack. The midfielder was traditionally entrusted with the task of bringing the ball from the defense and passing it to the attacking players. Midfielders are further classified according to their specific functions as defensive midfielders. Attacking midfielders, wingers and playmakers.Defensive MidfieldersDefensive midfielders act as a screen for the defenders. Defensive midfielders generally operate in the center of the pitch and tackle the opposition attacking players. The role of the defensive midfielder has grown into prominence of late and they operate as a back up to the defense.Attacking MidfieldersAttacking midfielders generally come forward from the midfield and assist the strikers and help them score goals. Attacking midfielders generally take the pass from the defensive midfielders and pass it to the strikers.WingersWingers are those players in the midfield line that play on the right and left ends of the pitch. Wingers generally bring the ball forward from the defense and either cross it into the path of the attacking players or run into the center, towards the goal.PlaymakerFew teams are lucky enough to have an efficient playmaker. A playmaker is the one that plays as an attacking midfielder, but has the vision and ability to understand and control the tempo of the game and helps the team by making important assists to the team's attacking players. The playmaker generally holds the ball forward and dictates the flow of the game.Inside ForwardThe traditional inside forward is on the wane now. The inside forward was the player generally stationed between the strikers and the midfielder.StrikerThe striker is the player employed by the team to go forward and score goals. A striker has to big all and fast and ought to be a good header of the ball.Soccer Terms Related to Player Formation3-5-2The 3-5-2 is one of the older formations that is very rarely used these days. In a 3-5-2, the team played with just the one center-back (sweeper), two full-backs, five midfielders and 2 strikers.4-4-2The 4-4-2 is perhaps the most common formation seen in football today and is widely followed basically because of its tactical simplicity. The 4-4-2 has two center-backs and and two full-backs in the defense, four midfielder of which one or two may be defensive midfielders and the rest are attacking midfielders and two strikers.4-3-3The 4-3-3 is generally seen as an aggressive and attacking formation. There are several different ways of playing out the 4-3-3 formation. Either way, the defense is composed the same way as it is in the 4-4-2. The 4-3-3 has three midfielders of which only one or all three may be played defensively. The three forward players can be arranged with two strikers and one playmaker behind them or with one striker and two attacking midfielders behind him.4-3-2-1The 4-3-2-1 or the pyramid formation is again a very rarely used formation owing to its 'narrowness'. The 4-3-2-1 has the usual four defenders, three defensive midfielders, two attacking midfielders and one striker. It is a narrow formation as there are no real out and out wingers to man the flanks and hence the full-backs are expected to get forward and cover the area on the wings.4-2-3-1Less narrow and more balanced than the 4-3-2-1 is the 4-2-3-1, which gives a bit more width as it stars three attacking midfielders and two defensive ones. But having two defensive midfielders can sometimes slow the tempo of the game down and make it far too defensive and really bottle up the goals.4-2-1-2-1Or quite simply, the 'diamond' is an effective enough formation although narrow and relatively less popular. The 4-2-1-2-1 has a diamond at the front with one striker at the front tip, two more strikers behind him, and one playmaker behind the two second strikers at the lower tip of the diamond. Two defensive midfielders play behind the diamond.W-MKnown as the W-M because if the formation was drawn on the pitch it would look like the players are arranged as the two letters. The W-M has three strikers, two attacking midfielders, two more midfielders just behind them, and 3 defenders. The W-M is now almost completely been discontinued.CatenaccioIf you look it up in a dictionary, it vaguely means 'door-bolt'. The catenaccio is a formation which we can call a 5-4-2 and uses five defenders. It is knows the door bolt as the door to the goal is rammed shut by the five defenders. The catenaccio again is a very sparingly used formation.Soccer Terms Related to Pitch DimensionsCenter LineThe center line is a line drawn across the pitch which divides its length into two equal halves.Center SpotThe center spot is the spot at the center of the center line and is the spot from which the teams kick off at the start of either half of the game or once a goal has been scored.Corner ArcThe corner arc is the demarcated area on the corners of the pitch from within which the corners can be taken.Penalty AreaThe penalty area is a rectangular area in front of the goal where, if a foul is made by the team defending that goal, it will lead to a penalty kick for the opposition team. The penalty area is also the only part of the pitch within which the goalkeeper is allowed to touch the ball with his hands.Penalty SpotThe penalty spot is a spot in front of the goal from which the penalty kick is taken.Read on for more information on soccer.


Soccer Field Dimensions
Soccer Field Layout


Other Basic Soccer Terms and RulesGoalUndoubtedly the most important part of the game is the goal. A team is said to have scored a goal when they successfully advance the ball forward into the opposition's area and shoot the ball into the area marked as the goal. The team which has scored the maximum number of goals by the end of the game wins.FoulA foul is generally a move deemed illegal by the referee. Common fouls include handling the ball, injuring or trying to injure an opposition player in an attempt to take the ball away from him.Corner KickA team is awarded a corner kick when a player of the opposition team hits the ball out behind the goal that his team are defending. Hitting the ball behind the opposition's goal does not lead to a corner kick. A corner kick is taken from the corner arc.Free KickA free kick is a kick taken by the player of a team which has been fouled. The opposition players aren't allowed to obstruct the player taking a free kick. The free kick need not be taken by the player who has been fouled and can be taken by any person from the team of the player who has been fouled.Penalty KickWhen a foul is made by a player in his penalty area (the area around the goal his team is defending), especially when the opposition player had a clear goal-scoring opportunity, a penalty kick is given. The penalty kick is taken directly from the penalty spot and no one other than the goalkeeper is allowed to defend it. The penalty kick need not be taken by the player who has been fouled and can be taken by any player from the team.CautionIf the referee sees a player making too many fouls, the referee has to ensure that the player is cautioned. Ignoring the caution and continuing to make fouls results in a yellow or red card depending on the nature of the foul.Yellow CardThe yellow card is given by the referee to a player as a caution for a foul deemed to be serious by the referee. A player receiving two yellow cards in one game is given a red card and sent off and will no longer be allowed to participate in the game.Red CardThe red card is given by the referee either after two yellow cards in one game or if the referee deems a foul so serious that a red card is the commensurate punishment. A 'straight red' (no yellow cards) is given when a player denies an opposition player a goal-scoring opportunity in the penalty area by committing a foul. A player receiving a red card either directly or as a result of two yellow cards is 'sent off' and is no longer allowed to participate in the game. The team whose player is sent off has to play with one player less.AssistThe assist is the last pass made by a player before the goal is scored. PossessionA player who has the ball is said to be in possession of the ball.HeaderA header is when the player touches the ball with his head.TackleA tackle is when a player makes an effort to get the ball from a player who has possession.CapThe number of caps a player has is the number of times a player has represented his club/country.CrossA cross is a pass made from one wing of the pitch towards the other side.Extra TimeWhen the score is level for a knockout game (not a league game), two halves of 15 minutes each are added as extra time. If the scores are still level at the end of extra time, the game goes into a penalty shootout.FormationA formation is a shape in which the players of one team are arranged.Half-TimeHalf time is a break which separates the first half of 45 minutes from the second half of 45 minutes.Hand ballWhen a player touches the ball with his hands, it is called a handball.Hat-TrickA player is said to score a hat-trick when he scores three goals in one game.Injury TimeInjury time/Stoppage Time/Time Added On is the time added at the end of each half to account for stoppages in play due to injuries, fouls etc.KickoffKickoff marks the start of a game.OffsideA player is said to be offside when he is closer to the opposition's goal than the opposition defenders, when the team mate of the former passes the ball to him.Penalty ShootoutIf in a knockout game, the scores of both teams are still tied, there is a penalty shootout where each team is given five penalty shots. The team that scores more penalties, wins.RefereeThe referee is the person employed to watch over the game and ensure that the game is played within the legal framework.LinesmanThe linesman is the one who checks and tells the referee which team's player took the last touch before the ball went out.Set PieceA free kick, corner or penalty is known as a set piece.Read on for more on soccer.


Soccer Positions on the Field
How to Play Soccer
Basic Soccer Rules
Basic Soccer Rules - Learn How to Play Soccer


So this was a comprehensive enough glossary of soccer terms which ought to get you to understand the basics of the game. Soccer is an exciting game, so now that you know the terms, go on and have fun!

2010年5月9日星期日

Jetlasers is Making all titanium green laser pointers

http://www.jetlasers.net

It explains why one or two top notch laser factories begin to think of choosing the titanium to make the laser pointer's casing, because titanium is of elastic properties, corrosion resistance, resistance to wear, colorability, and also its inherent "cool" factor . All this will give a tactile feel when you touch the green laser pointer. If the titanium is too expensive, Jetlasers would rather stick to it and make it the most high-end laser pointer pen in the world, certainly, combined with its upgraded crystals that guarantees the excellent heat discharging capability, stability and reliability.

To keep the balance is different, but the jetlasers green laser pointer will give it a try and set a good example to all fragile laser pointers or portable lasers in today's laser world.

2010年5月7日星期五

All Titanium Green Lasers: When Rarest Titanium Embraces Lasers


Ordinary green lasers are everywhere, but their limitations sometimes minimize their usefulness in varying environments. For example, the crystal and electric circuits would be eroded over time if the ordinary green lasers are operated at too humid environments. The incompetent heat transfer will easily make ordinary green lasers overheated after being turned on for a little while. Some green laser pointers are made to be too fragile to stand the shock and shake in normal use. To make the breakthrough upon existing laser pens or portable alloy-made lasers are barely possible. The laser pointers and portable lasers need to be revoluntionized anyway, while it's obviously difficult to keep the costs down, especially when the employment of all titanium strikes the engineers at jetlasers.We all know titanium is a critical strategic metal used in aerospace, automobiles, prosthetics, architecture and sporting goods. Nobody ever did think of using it on laser pointer pens or portable lasers, right? After all, to most people, laser tech is such a cutting-edge technology that it takes a lot of money to get a high stability laser pointer itself.Simply the use of titanium on green laser pens or portable green lasers can potentially shock most laser hobbyists. However, jet lasers or jetlasers company knows how to shock people better. People soon find themselves lost in a land of unique and revoluntionized all-titanium laser models. The lasers are waterproof to 30 meters and will be free from any oxidation even it's soaked in water for 3 years. The anti-shock feature is also surpising enough, and it will stay well even if it falls down from 14 meters' height. We've tested the all titanium casing that equips the led, it works well after such intense "fall".It seems that time has come for everyone to have a almighty green laser pointer that can be used in all kinds of weather conditions.Background InformationPartnered with the the biggest Titanium production base in northern China, Jetlasers also comes up with the patented military-grade pure titanium green laser pointer models, which hits the market the moment it strikes the idealism of the universal laser world. A series of photonics exhibitions witness the rise of Jetlasers all titanium laser models, while more and more laser hobbyists have been enthusing about those rarest and robustest lasers in their collection and meanwhile they bring the good name of the unique portable laser products into the world.

2010年4月27日星期二

150mw Burning Green Lasers at Jetlasers

When Titanium Houses Laser Diode Tightly

jetlasers,green laser pointer, green lasers Ordinary green lasers are everywhere, but their limitations sometimes minimize their usefulness in varying environments. For example, the crystal and electric circuits would be eroded over time if the ordinary green lasers are operated at too humid environments. The incompetent heat transfer will easily make ordinary green lasers overheated after being turned on for a little while. Some green laser pointers are made to be too fragile to stand the shock and shake in normal use.

To make the breakthrough upon existing laser pens or portable alloy-made lasers are barely possible. The laser pointers and portable lasers need to be revoluntionized anyway, while it’s obviously difficult to keep the costs down, especially when the employment of all titanium strikes the engineers at jetlasers.

We all know titanium is a critical strategic metal used in aerospace, automobiles, prosthetics, architecture and sporting goods. Nobody ever did think of using it on laser pointer pens or portable lasers, right? After all, to most people, laser tech is such a cutting-edge technology that it takes a lot of money to get a high stability laser pointer itself.

Simply the use of titanium on green laser pens or portable green lasers can potentially shock most laser hobbyists. However, jet lasers or jetlasers company knows how to shock people better. People soon find themselves lost in a land of unique and revoluntionized all-titanium laser models.

The lasers are waterproof to 30 meters and will be free from any oxidation even it’s soaked in water for 3 years. The anti-shock feature is also surpising enough, and it will stay well even if it falls down from 14 meters’ height. We’ve tested the all titanium casing that equips the led, it works well after such intense “fall”.

It seems that time has come for everyone to have a almighty green laser pointer that can be used in all kinds of weather conditions.

Background Information

Partnered with the the biggest Titanium production base in northern China, Jetlasers also comes up with the patented military-grade pure titanium green laser pointer models(including laser dazzlers), which hits the market the moment it strikes the idealism of the universal laser world. A series of photonics exhibitions witness the rise of Jetlasers all titanium laser models, while more and more laser hobbyists have been enthusing about those rarest and robustest lasers in their collection and meanwhile they bring the good name of the unique portable laser products into the world.

2010年4月26日星期一

About Jetlasers

jetlasers,green laser pointer, green lasers

JiNan Jet Lasers Optics Tech Co., Ltd.

www.jetlasers.net

JiNan Jet Lasers Optics Tech Co., Ltd. is a specialized manufacturer for high quality diode-pumped solid-state lasers. With a group of engineers with years of experience in laser research and manufacturing, JetLasers are always innovating and developing new laser products to meet the universal needs for high stability & quality products to our customers.

Founded in 2005 by a few young enigineers as a laser workshop that only provided limited OEM and processing services, Jetlasers Inc. has grown to one of the most renown independent laser manufacturer in northern China. Been partnering with top factories in China, Jetlasers has becomes a specialized laser producer that provides a wide range of laser products for labs, scientific, military, and medical uses.

The laser products Jet Lasers designs and manufactures are featured with high efficiency, high reliability, longer time and maintenance free, and they're one of the rarest lasers with ultra high cost performance. In recent years, Jetlasers products not only gradually passed the certification of CE, RoHs and FDA, but also have widely used laser display, Laser Alignment, Scanning Biochemistry and Material Inspection Lidar, Wafer Inspection, Optical Data Storage, etc. A special thanks to support and partnership of CNI, Scitower and other top-notch laser manufacturers, Jetlasers makes great headway in the optoelectronic field since 2007.

Partnered with the the biggest Titanium production base in northern China, Jetlasers also comes up with the patented military-grade pure titanium laser models, which hits the market the moment it strikes the idealism of the universal laser world. A series of photonics exhibitions witness the rise of Jetlasers all titanium laser models, while more and more laser hobbists have been enthusing about those rarest and robustest lasers in their collection and meanwhile they bring the good name of the unique portable laser products into the world. In the following years, Jetlasers will be committed to making more and more breakthroughs.

Whether you are a retail client, general user, engineering director, or government purchaser, we're open to your ideas and requirements and committed to getting the right laser product and installation for you, at a fair price, on time, with unmatched quality.