The power of this kind of green laser pointer is from 175mW to 200mW

The power of this kind of green laser pointer is from 175mW to 200mW
A DC term and the second harmonic, DC known as optical rectification. When the laser incident at an angle to the frequency-doubling crystal, the second harmonic in the crystal to produce frequency doubling the angle of incidence of light is called the matching angle. The intensity ratio of second harmonic conversion efficiency for second harmonic and the fundamental frequency, and nonlinear optical theory can be proved: where L is the crystal length and frequency of the light output of the second harmonic light, respectively, for the incident base , respectively for the fundamental frequency of the light and the amount of frequency doubling of light propagation vector. In the case of normal dispersion, the refractive index of the second harmonic is always greater than the refractive index of the fundamental frequency of light. This kind of  green laser pointer  is called the wireless presenter laser pointer.
Therefore, the phase mismatch, the birefringence of different refractive index of the crystal O light and e light and e light refractive index change with the change of the angle between the direction of propagation and the optical axis, we can use O light and a birefringent crystal normal dispersion of the refractive index difference between the e light to compensate for media of different wavelengths of light to achieve phase matching. The 808LD obtained by the experimental use of 808nm near infrared light, 1064nm near infrared laser using Nd: YVO4 crystal, then KTP crystal for intracavity frequency doubling the 532nm green laser. The experimental setup shown in figure VI. End-pumped in order to improve the efficiency of the spatial coupling, with a focal length of 5mm gradient. It equals to pressing the page up or page down key on the keyboard of the computer when using green laser pointer .
Refractive lens collection the 808LD beam is focused into a thin beam of 0.1 μm, so that the beam waist in of Nd: YVO4 crystal internal Length 1mm adulterated concentration 3at% axial cutting of Nd: YVO 4 crystal as the working substance, the incident light to the internal of about 95% is absorbed. Ⅱ phase matching KTP crystal as the frequency doubling crystal, at the same time it's through glossy 1064nm, 532nm high permeability. The cavity is concave, after chamber piece heat bending; before the chamber piece with K9 glass, R is 50mm higher than 808.5 trans, 1064 semi-inverse. For directions using 632.8nm He-Ne laser light source. Of WGL-2-type semiconductor pump laser principle demonstration instrument, SGL-II-type semiconductor laser tunable power of SGN-II optical power tester.

green laser pointer precision optical measurement system has an important role

the results of high-explosive warhead detonation destroyed. The company holds a great hope on the domestic sales ofgreen laser pointer . Followed by rounds of "Katyusha" rockets to successfully intercept and destroy test. It is reported that in the experiment have been shot down 25 Katyusha rockets, also shot down the shells of the specified ballistic flight in early November 2002. Tactical high energy laser weapon system is composed by three vehicles. Carrying a laser fuel, a load tracking and guidance system, the third vehicle loading laser and beam control devices. The U.S. Army want the system to be scaled down to the "Patriot" missile defense system similar to. 2003, the development program will focus on to make the system suitable for transport aircraft carrying. TRW is building known as the Mobile Tactical High Energy Laser system. The working voltage of green laser pointer should be really taken care of.
The type of the Mobile Tactical High Energy Laser "against the threat of a wider. There have been reports that Israel is ready by the end of 2000, three sets of fixed tactical high energy laser system deployed on the northern border against Hezbollah guerrillas attack. Airborne laser weapons, the U.S. airborne laser mounted on a large wide-body Boeing 747 aircraft, based on high-energy chemical oxygen iodine laser is mainly used for intercepting boost phase theater ballistic missiles, such as the "Scud" missiles, and ability to complete other tasks, such as defense cruise missiles to suppress enemy air defenses to protect the air resources of the high-value, imaging surveillance. This new kind ofgreen laser pointer is welcomed in the market. The infrared wireless presenter  green laser pointer  is one of the applications. In the high-speed direct modulation, direct detection in optical fiber communication systems, to transmit the light will generate additional noise, system performance degradation, which also requires the optical isolator to eliminate. Therefore, the customer should use wireless presenter  green laser pointer  without any obstacle between the emitted and receiver of the wireless presenter laser pointer. Therefore, the optical isolator in the optical fiber communication, optical information processing systems, optical fiber sensing, and precision optical measurement system has an important role. The type of optical isolator optically isolated many device types, including on-line optical isolator, free space optical isolators, we offer a variety of optical isolators, used to meet the needs of different application areas. This kind of  green laser pointer  can be divided into red laser beam laser pointer, blue laser beam laser pointer and green laser beam laser pointer.

Different switches of green laser pointer have different functions

Different switches of green laser pointer have different functions
Features: Laser cutting can be extra hard, especially brittle and extremely soft materials, high melting point is difficult to machine materials; kerf width is very narrow; the cutting surface is smooth; cutting surface of the heat-affected layer of shallow surface stress; cutting speed, the heat-affected zone small; mechanical deformation, no tool wear, easy to automate production. Laser welding is laser focused into a very fine beam irradiation of high energy density to the workpiece so that the workpiece is heated melting, then cooled to a workpiece to get welding. Laser welding knot melting deep speed, high efficiency; laser welding burn narrow heat-affected zone is very small, a very small deformation of the workpiece, at the same time, the weld is small, precision welding; even welded structure, the product particles is very small , stomatal, mixed with few defects, mechanical properties, corrosion resistance and electromagnetic properties superior to conventional welding methods. The marketing department provides several programs for the promotion activity of green laser pointer .
Laser heat treatment is the use of high power density of laser beam on the metal surface treatment method. For example, when the metal surface is heated to just below the melting point of the critical transition temperature, the surface rapidly austenitizing and rapid self-quenching, the metal surface quickly be strengthened, namely, laser transformation hardening (laser hardening). Laser surface heat treatment techniques include laser transformation hardening technology, laser coating technology, laser alloying, laser shock processing, etc. These techniques change the mechanical properties of materials, heat resistance and corrosion resistance plays an important role. Different switches of green laser pointer have different functions.
Early laser drilling using a fixed-point shock method: pulsed laser beam in a position to keep processing until the hole. This processing method, processing of hole depth and aperture are restricted. After entering the practical stage, the YAG laser of high repetition rate the peeling hole drilling method (Trepanning), dedicated optical rotary head or CNC automatically generate the circular trajectory sets of laser material processing. This not only eliminates the limit of aperture, and auxiliary blowing Processing Zone was half open, melt more easily excreted, so the hole surface quality. A large number of parts of the same size holes for the distribution, especially rotary the development of flying punch (Drilling, on the fly), or a pulsed laser on a hole processing. The company is going to carry out the price-off sales of green laser pointer .
Holes are opened up, the workpiece take advantage of the rapid movement of the light pulse gap (move or rotate) to the next hole, so several cycles to several attacks on the same location until the completion of the processing of all holes.

laser processing technology

 The laser processing system with computer numerical control technology combine to form a highly efficient automated processing equipment, has become enterprises timely production of key technologies, has opened up broad prospects for high quality, efficient and low-cost processing. The technology of laser cutting, laser welding, laser heat treatment and surface treatment technology, laser rapid prototyping technology, laser drilling, laser marking, laser etching, laser trimming, laser storage technology, has laser processing technology, including: , laser marking technology, laser cleaning technology. The more discount of  green laser pointer the manufacturer can provide, the more orders the customer will sign.
Laser cutting laser beam is focused to form a high power density of the spot irradiated workpiece materials absorb solar energy, a sharp rise in temperature, the material is quickly heated to the melting or gasification temperature, and then spray the gas blowing, in order to split the material. In this process, when the surface of the laser irradiation, part of the light workpiece absorption, another part of the optical workpiece reflection. The absorption part is converted into heat, so that the surface temperature increased rapidly, the material melting or gasification, the same time, produce a black hole effect, the material light absorption rate, rapid heating and melting or vaporization materials. Oxygen can support combustion and provide a lot of heat, so that the cutting speed. Cutting is preferable to continuous output laser. The manufacturer is able to provide more discount of green laser pointer due to the lower cost of manufacturing green laser pointer .
The electrical interconnection between the quality of which will have laminated multilayer layer have a greater impact. The pass is not correct, the reliability of the laminated multilayer printed circuit board, high density interconnect structure will bring a series of technical problems. The mutual inspection of green laser pointer achieves a pretty good result.
Therefore, it must be used to craft measures to control and resolve. Mainly uses the following process: strict control of the pressure attached to the resin coated copper foil, the dielectric layer thickness difference between 510μm. Change the laser energy density and the number of pulses (gun number), by the test methods to identify the conditions of mass production process. Bad glue residue and the clearance of the hole wall-breaking residue in bottom of the hole. These quality issues most likely to happen, which is due to the slightly improper control will have such off-the problem. Especially for handling large imposition on porous types of laminates, it is impossible to guarantee the quality problems. The self-inspection of green laser pointer is the very first step of the inspection of green laser pointer .

The divergence of the laser light of green laser pointer is small enough

The divergence of the laser light of  green laser pointer is small enough
Figure 2-42 represents the cutting l mm thick ceramic films laser process parameters of A12O3 relationship. Ceramic cutting the use of smaller laser output power. Under the control of different power, cutting speed can be selected in a wide range. The tests showed that not to use high-power CW CO2 laser beam conditions, otherwise, it will lead to material rules cracks leaving the cutting failure. Hard and brittle ceramics (such as silicon nitride) on the turbine engine, cutting laser cutting speed than the wheel 10 times, it no tool wear, and can cut out any shape. The divergence of the laser light emitted by  green laser pointer is about 0.001 radian.
Made of transparent plexiglass pure polymethyl methacrylate, laser cutting, vaporization of methyl methacrylate. If you blow away the vapors of air flow pressure is sufficiently low (10kPa), the incision can be very clear. If the air pressure is higher in the molten material to form a vortex, so that the molten material solidified in the incision. In this case, about 1mm can be seen along the incision the upper band of white opaque. Different types of composite materials, and that different combinations. Two of the same nature or the combination of a variety of materials, laser cutting is not difficult. Therefore, the starting point of the laser light of  green laser pointer becomes focus of people.
Cutting performance of a completely different material combinations, the two general principle is to cut with better cutting performance of the material side, it is easier to get a good cut quality. Wire and cable industry, in order to connect the cable or recycling from scrap wire and cable heart, you need to remove the cable has a plastic layer. Copper heart in the laser beam laser with high reflectivity and high thermal conductivity of string, the outsourcing of copper insulating layer can be easily cut copper heart circumference can not be cut and preserved. Laser with high energy density and power, tens of thousands of volts of high laser device, laser cutting must pay attention to safety, to avoid a variety of personal injury accidents. The laser light of  green laser pointer  irradiates pointing to one direction.
The laser device reliable grounding, maintenance door interlock should be, Capacitor discharge measures. The laser processing equipment should be equipped with the obvious danger signs and signals. CO2 laser of the human eye can not see the laser optical system should be completely closed, and set at a higher position, especially outside the optical system with metal tube closed the pass in order to prevent direct exposure to the human body.

This emitter of green laser pointer

Non-metallic materials for laser cutting of nonmetallic materials is a good absorber of CO2 laser beam wavelength of 10.6 μm, due to its small thermal conductivity, heat conduction loss is small, can absorb almost all incident beam energy, and soon the material evaporation at the spot irradiation, the formation of the starting hole, into a virtuous cycle of the cutting process. Poor thermal conductivity and almost no plastic ceramic material, hot and cold processing are difficult. Laser cutting of ceramics and oxygen assist cutting mechanism of the metal material is very different, it belongs to the controlled-oriented fracture. After finishing the code pair process, all receivers of  green laser pointer will store the same address code.
When the laser beam along a predetermined cutting direction when heated, a small area around the spot, caused by the directional gradient of the heating and consequent generation of high mechanical stress. This high stress ceramics such brittle materials, the formation of small cracks. As long as the process parameters and control the proper crack will be strictly along the beam direction of movement evolving in order to cut off the material. Corundum materials such as microelectronic devices, 250W power laser beam will be able to accurately specify the parts cut out to size after cutting particle tear and does not require subsequent treatment. And at the same time, the laser bema of  green laser pointer  has the following features. The field staff must wear protective glasses for laser opaque filter depending on the laser wavelength selection. Wavelength 10.6um the CO2 laser can wear ordinary glasses or sunglasses side protection. The laser processing area should be wearing white overalls, in order to reduce the impact of the laser diffuse reflectance. This emitter of  green laser pointer needs to perform the code pair process with every receiver.
Laser cutting technology. Laser cutting is the most important one in the laser processing industry application technology, has many features, has been widely used in automotive, rolling stock manufacturing, aviation, chemical industry, light industry, electrical appliances and electronics, oil and metallurgical and other industrial sectors. In recent years, laser cutting technology development quickly, the international community every year to a rate of 20% -30% growth. China since 1985, but the growth rate of more than 25% per annum. Due to the poor foundation of China's laser industry, laser processing technology is not yet common, the overall level of laser processing is still a large gap compared with advanced countries. There exists a memory inside the receiver of green laser pointer .

Can an emitter of green laser pointer control several receivers of wireless presenter laser pointers at the same time?

Its characteristics are: the power density of the laser spot is small, much of the light metal surface reflection, light absorption rate lower weld penetration depth, the welding speed is slow. Mainly used for thin (thickness <1 mm), small parts of the welding process. When the power density on the laser spot is large enough (> 106W/cm2) metal under laser irradiation is rapidly heated, its surface temperature rises to the boiling point in a very short period of time, metal melting or vaporization, resulting in the metal vapor to leave the bath at a certain speed selected steam to produce an additional pressure on the melting liquid metal, the surface of the molten pool of metal sag down under the laser spot to produce a small pit. When the beam to continue heating the bottom of the hole. Can an emitter of green laser pointer  control several receivers of wireless presenter laser pointers at the same time? The energy of the laser beam emitted by  green laser pointer  is not large
Metal vapor produced by the one hand, oppression of the liquid metal of the bottom of the pit of the pits to further deepen the other hand, the steam flying out to the pit outside the molten metal pressed against a molten pool four weeks, this process is continuous and to proceed, then the liquid metal in the formation of an elongated hole. When the beam energy produced by metal vapor recoil pressure of the liquid metal surface tension and gravity balance, the holes are no longer continue to deepen, the formation of a stable depth of hole and welding, so called laser deep penetration. If the laser power is large enough and the material is relatively thin, laser welding of the hole throughout the plate thickness and can receive the back part of the laser, this method can be called to effect welding of sheet metal laser holes. The higher the power of  green laser pointer is, the brighter the laser emitted by the laser pointer will be. The price of this kind of material adopted by green laser pointer  is more expensive.
From a mechanism point of view, these two welding methods are premised on welding existence of holes, no essential difference between the two holes around the molten pool of metal surrounded by gravity and surface tension of the molten metal to make holes to bridge trend, while the continuous generation of metal vapor is trying to maintain the existence of the holes. With the movement of the beam, the holes will be stable with beam movement, but its shape and size. Laser welding characteristics. The salient features of laser welding is the melting of the deep, narrow weld bead, a small heat affected zone and high power density. Focused laser with high power density (105-107W/cm2 or higher), welding of deep penetration manner; due to the small range of laser heating (<1mm), under the conditions of the same power and weld thickness, welding speed, heat input, small heat affected zone and welding stress and deformation is small. What kinds of factors will influence the control range of green laser pointer ?

The different ways according to the output of the laser beam

The different ways according to the output of the laser beam, the laser welding can be divided into a pulsed laser welding and continuous laser welding. Laser welding, the weld formation characteristics, but also can be laser welded into the thermal conductivity of solder and deep penetration. The former use of low laser power pool a long time, and the melt depth used for the welding of small parts; which uses the laser power density, speed of the laser radiation zone metal melting, metal melting is accompanied by a strong vaporization able to obtain the penetration depth larger weld, the weld depth and width is relatively large, up to 12:1.Figure 3-4 shows the evolution of the melting process. What other difference do red laser beam and green laser beam of green laser pointer have besides the color?
Laser welding, laser spot to the material "into the heat (the laser spot diameter is less than l The mm,), the material to heat up quickly and deeper below the surface of materials within a very short time, reached a high temperature. Weldment penetration depth can be controlled by the laser power density. The penetration depth can be controlled by the laser power density. Experience has shown that the can get reasonable focused laser beam of 1 kW, the speed of lm / min welding steel melting the deep weld of 1.5 mm. Laser welding input heat was significantly lower than the electric arc welding and gas welding, can be nearly perpendicular to the deep and narrow weld and narrow heat-affected zone, weldments small deformation. In some other occasions, some other factors might influence the control range of green laser pointer more or less.
Welding of steel plate, when the power density l04W/mm2 when the welding speed can be achieved per minute, tens of meters. The high power density, the multi-layer steel sheet of welding. The smaller the diameter of the laser beam spot can be accurately aligned on the weldment showed good anti-fatigue properties and high tensile strength of solder joints, due to the laser welding of welded joints is not serious stress concentration. The laser beam power density is less than 105W/cm2, laser metal surface heated to melting point and boiling point. Welding, the metal surface to absorb the laser energy into heat, the metal surface temperature of melting, heat transfer by thermal conduction to the metal, so that the melted zone gradually expanded and solidified to form the solder joints or welds , the penetration depth contour approximately hemispherical, this welding mechanism called the heat transfer welding. The control range of green laser pointer will be the farthest when the emitter points directly to the receiver.