The back end of Laser Pointer will be shown.
1970, a laser wavelength of 9000A, the room temperature continuous double heterojunction caAs-GaAIAs (gallium aluminum arsenide) GaAs lasers. The birth of the double heterostructure laser (DHL), the available band continue to broaden the line width and tuning performance gradually improved its structure is characterized by the growth of a thin layer only 0.2tt.m thick, not doping, has a narrow bandgap material between the P-type and n-type material, Note A .00 carrier is limited in the region (active region), and thus less current injection can be achieved reversal of the carrier number in the semiconductor laser device is more mature, better performance, application broader electrically injected GaAs diode laser with a double heterostructure. When Laser Pointer are the focus adjustable type.Which rely to a homojunction or heterojunction and a positive bias to the active layer Note the necessary carrier electrons from lower energy valence band excitation to the higher energy conduction band When the compound of a large number of electrons and holes in the inversion state, have given rise to the role of stimulated emission. to actually get to coherent stimulated emission must be made by stimulated emission of radiation in the optical cavity repeatedly Feedback antireflective coatings on the formation of laser oscillation, the laser cavity is formed as a mirror by the semiconductor crystal of the natural cleavage plane, usually in the end that no light is coated with high reflective multilayer dielectric thin film, out of the glossy plated on F -p cavity semiconductor laser crystal can easily use the P-n junction plane perpendicular to the natural cleavage plane of a surface constitute the F-P cavity. Laser Pointer is to create or generate the star laser effect.
Semiconductor lasers in laser ranging, laser radar, laser communications, laser simulation, weapons, laser warning, laser-guided tracking, igniting the detonator, automatic control, testing equipment, such as a wide range of applications, the formation of a broad market in 1978. the semiconductor lasers used in optical fiber communication systems, semiconductor lasers can be used as light sources and indicators of the optical fiber 7 communication and optoelectronics system LSI planar process. due to the excellent characteristics of semiconductor lasers with ultra-compact, high efficiency and high-speed work, so the development of such devices, and optical technologies closely integrated with optical communications, optical transform, optical interconnects, parallel lightwave systems. If the customer adjusts the focus of Laser Pointer manually.
Saturday, October 27, 2012
Thursday, October 25, 2012
The laser beam light color of laser pointer can also be customized
The laser beam light color of laser pointer can also be customized.
Expected the Tenth Five-Year "period, Wuhan State Optoelectronic Information Industry, Road Traffic and base infrastructure investment scale of $ 5 billion., Broadband networks, Wuhan National Optoelectronics Industry Base has strong communication skills, and virtually network digital transmission of optical fibers, business information technology exchange have off the mountain, off South Temple Mountain, Luxiang 4 telecom base exchange capacity of 200 000, 78 light access point to achieve SDH the combination of optical transmission systems and DWDM systems, the transmission bandwidth has reached 40G, the backbone nodes in the base core nodes Wuhan Telecom China Telecom 320G backbone transmission network connection, the international outlet bandwidth up to 3.3G, has been built based on the optical transmission network. the sixth chapter of the main measures strengthening of institutional innovation, the establishment of reasonable and efficient operation and management mechanisms to strengthen the institutional innovation, and give full play to the advantages of the provinces, municipalities and build a condominium regime, to further clarify the functions of the base construction and management of institutions, strengthen the sense of service of the government departments and the "second pioneering" consciousness. It is as per the real needs and actual situations of laser pointer .The performance of the continuous wave output of laser pointer is good enough
Truly the administration according to law, and efforts to form a government decrees, the same rights and responsibilities, flexible command and efficient operation of building a new management mechanism. Full role of market mechanism, through strong government to guide and actively promote the activation of the innovative resources to enhance the vitality of enterprises, enterprises have become the base for the construction of the main body to form a "policy guidance" type of operation and management mechanism and give full play to the guiding role of the policy to promote the establishment and perfection of the modern enterprise system, joint collaboration, merger, reorganization, as well as state-owned assets of enterprises retreat to create good conditions, and gradually establish a good system of economic operations with international standards. A bigger size of laser pointer can be customized.The base of the main area of 30 square kilometers. Optoelectronic information industry classification and land status, optoelectronic information industry is divided into five parks: East Lake High-Tech Industrial Park: Located in the eastern part of the East Lake Development Zone, an area of about eight square kilometers, including Kanto Technology Industrial Park off South Science and Technology Industrial Park, part of the major development of fiber optic cable, optoelectronic devices, optical communications systems and equipment, digital cameras, CD-ROM, industrial laser and medical lasers, and other products has been built YOFC FiberHome Wuhan NEC, laborers ZhengYuan, Himalayan, Chutian Laser and other famous enterprises.
Expected the Tenth Five-Year "period, Wuhan State Optoelectronic Information Industry, Road Traffic and base infrastructure investment scale of $ 5 billion., Broadband networks, Wuhan National Optoelectronics Industry Base has strong communication skills, and virtually network digital transmission of optical fibers, business information technology exchange have off the mountain, off South Temple Mountain, Luxiang 4 telecom base exchange capacity of 200 000, 78 light access point to achieve SDH the combination of optical transmission systems and DWDM systems, the transmission bandwidth has reached 40G, the backbone nodes in the base core nodes Wuhan Telecom China Telecom 320G backbone transmission network connection, the international outlet bandwidth up to 3.3G, has been built based on the optical transmission network. the sixth chapter of the main measures strengthening of institutional innovation, the establishment of reasonable and efficient operation and management mechanisms to strengthen the institutional innovation, and give full play to the advantages of the provinces, municipalities and build a condominium regime, to further clarify the functions of the base construction and management of institutions, strengthen the sense of service of the government departments and the "second pioneering" consciousness. It is as per the real needs and actual situations of laser pointer .The performance of the continuous wave output of laser pointer is good enough
Truly the administration according to law, and efforts to form a government decrees, the same rights and responsibilities, flexible command and efficient operation of building a new management mechanism. Full role of market mechanism, through strong government to guide and actively promote the activation of the innovative resources to enhance the vitality of enterprises, enterprises have become the base for the construction of the main body to form a "policy guidance" type of operation and management mechanism and give full play to the guiding role of the policy to promote the establishment and perfection of the modern enterprise system, joint collaboration, merger, reorganization, as well as state-owned assets of enterprises retreat to create good conditions, and gradually establish a good system of economic operations with international standards. A bigger size of laser pointer can be customized.The base of the main area of 30 square kilometers. Optoelectronic information industry classification and land status, optoelectronic information industry is divided into five parks: East Lake High-Tech Industrial Park: Located in the eastern part of the East Lake Development Zone, an area of about eight square kilometers, including Kanto Technology Industrial Park off South Science and Technology Industrial Park, part of the major development of fiber optic cable, optoelectronic devices, optical communications systems and equipment, digital cameras, CD-ROM, industrial laser and medical lasers, and other products has been built YOFC FiberHome Wuhan NEC, laborers ZhengYuan, Himalayan, Chutian Laser and other famous enterprises.
The company will try to reduce the cost and expense of laser pointer
The company will try to reduce the cost and expense of laser pointer .
For the blue-green laser communication, are still in the prototype development stage of countries. For other applications, the best available information from the current perspective, the concept is still in research stage. However, due to blue-green laser technology has the unique properties, will undoubtedly in the near future, the blue-green laser based on a variety of applications in naval equipment occupy an important position. The instrument can be used for complex oceanographic research is a common blue-green laser airborne radar system. According to reports, the instrument can detect complex 100 meters from the water signal, and be able to describe the inner surface of the output wave of new oceanographic applications. The low cost of laser pointer will attract more customers.Working band is blue-green laser light propagation in the ocean window, using blue-green laser communication, it may be related to the activities of submarines in the world's oceans to establish communication channels. In this way, communication, submarine can not surface in the deeper water depth or cruise using the receiver on its own shell Collecting message, did not affect the submarine and is not going to expose. In addition, the use of blue-green laser communication also has a high data transfer rates, excellent privacy, anti-interference ability and duplex communication. The working state of laser pointer is normal.
U.S. Navy from 1977 made satellite - the feasibility of submarine communications, research on long-term plan with the U.S. Bureau of Defense began the implementation of joint strategic laser communications program. From 1980 onwards, almost every two years to the frequency, for a total of 6 times so far offshore potential of large blue-green laser communication experiments, including the successful conduct of these trials 12 km altitude on the water 300 meters deep sea submarine Single laser communications experiment, and the higher the sky, long endurance unmanned aircraft and the simulation time to the normal navigation dive depth and speed duplex laser communication between the submarine feasibility test can confirm the blue-green laser communication When the weather is not normal, heavy rain, muddy water under harsh conditions such as normal. The working state of laser pointer should be checked.
The end of 1983, the former Soviet Black Sea Fleet's main base in Sevastopol also carried out near the blue laser beam is sent to the space mirror and then forwarded to the track ballistic submarine underwater laser communication experiments. The United States during the 10 years since the continuous laser communications experiment, and gradually form a relatively bright satellites - submarine laser communications development.
For the blue-green laser communication, are still in the prototype development stage of countries. For other applications, the best available information from the current perspective, the concept is still in research stage. However, due to blue-green laser technology has the unique properties, will undoubtedly in the near future, the blue-green laser based on a variety of applications in naval equipment occupy an important position. The instrument can be used for complex oceanographic research is a common blue-green laser airborne radar system. According to reports, the instrument can detect complex 100 meters from the water signal, and be able to describe the inner surface of the output wave of new oceanographic applications. The low cost of laser pointer will attract more customers.Working band is blue-green laser light propagation in the ocean window, using blue-green laser communication, it may be related to the activities of submarines in the world's oceans to establish communication channels. In this way, communication, submarine can not surface in the deeper water depth or cruise using the receiver on its own shell Collecting message, did not affect the submarine and is not going to expose. In addition, the use of blue-green laser communication also has a high data transfer rates, excellent privacy, anti-interference ability and duplex communication. The working state of laser pointer is normal.
U.S. Navy from 1977 made satellite - the feasibility of submarine communications, research on long-term plan with the U.S. Bureau of Defense began the implementation of joint strategic laser communications program. From 1980 onwards, almost every two years to the frequency, for a total of 6 times so far offshore potential of large blue-green laser communication experiments, including the successful conduct of these trials 12 km altitude on the water 300 meters deep sea submarine Single laser communications experiment, and the higher the sky, long endurance unmanned aircraft and the simulation time to the normal navigation dive depth and speed duplex laser communication between the submarine feasibility test can confirm the blue-green laser communication When the weather is not normal, heavy rain, muddy water under harsh conditions such as normal. The working state of laser pointer should be checked.
The end of 1983, the former Soviet Black Sea Fleet's main base in Sevastopol also carried out near the blue laser beam is sent to the space mirror and then forwarded to the track ballistic submarine underwater laser communication experiments. The United States during the 10 years since the continuous laser communications experiment, and gradually form a relatively bright satellites - submarine laser communications development.
Tuesday, October 23, 2012
Most customers emphasize the after service of Laser pointer
Most customers emphasize the after service of Laser pointer .
For many mechanical and electrical manufacturing industry, modern computer program controlled laser cutting system to facilitate the cutting of workpieces of different shapes and sizes, it is more often than punching, molding process is preferred; despite its processing speed is slower than the punches. but it does not mold consumption, no need to repair the mold, while also saving to replace the mold time, thus saving processing costs, reduce production costs, so the overall consideration is more cost-effective. Laser cutting is a high energy density controllability of good non-contact processing. Laser beam is focused to form a very small point of strong energy, it used in cutting many of the features. First, the laser light energy to convert the amazing heat retention in a very small area can provide (1) narrow straight edge slotted; (2) The minimum heat-affected zone adjacent a cutting edge; (3) very small local deformation. This kind of Laser pointer has two models suitable to different locations.
Laser cutting a wide range of adaptability and flexibility. Compared with other conventional methods of processing, laser cutting and greater adaptability. First, compared with other thermal cutting methods, the same as a thermal cutting process, other methods can not be like a laser beam as the role of a very small area, resulting in wide incision, the heat-affected zone and obvious deformation of the workpiece. Laser cutting non-metallic, and other thermal cutting methods can not be. Laser cutting of the main process. High power density laser beam heating, the surface temperature rose to the boiling temperature of the speed is so fast enough to avoid melting caused by heat conduction, so part of the material vaporized into steam to disappear, part of the material as ejecta from the kerf bottom The auxiliary gas flow blown away. The manager explained the easy manipulation function of this kind of Laser pointer .
When the incident laser beam power density exceeds a certain value, the beam irradiation point inside the material begins to evaporate, and the formation of holes. Once such a small hole is formed, it will absorb all of the incident beam energy as a blackbody. Holes surrounded by the molten metal wall, then the beam coaxial auxiliary air holes around the molten material away. With moving parts, holes synchronous traverse the cutting direction to form a kerf. The laser beam is to continue along the slit cutting-edge radiation, continuous or pulse of the molten material to be blown away from the seam inside. The general use of inert gas melt cutting, replaced by oxygen or other reactive gases, materials under the irradiation of the laser beam was ignited fierce chemical reaction with oxygen to produce another heat source, known as the oxidation of the melt cutting. The working time of Laser pointer can be calculated accurately.
For many mechanical and electrical manufacturing industry, modern computer program controlled laser cutting system to facilitate the cutting of workpieces of different shapes and sizes, it is more often than punching, molding process is preferred; despite its processing speed is slower than the punches. but it does not mold consumption, no need to repair the mold, while also saving to replace the mold time, thus saving processing costs, reduce production costs, so the overall consideration is more cost-effective. Laser cutting is a high energy density controllability of good non-contact processing. Laser beam is focused to form a very small point of strong energy, it used in cutting many of the features. First, the laser light energy to convert the amazing heat retention in a very small area can provide (1) narrow straight edge slotted; (2) The minimum heat-affected zone adjacent a cutting edge; (3) very small local deformation. This kind of Laser pointer has two models suitable to different locations.
Laser cutting a wide range of adaptability and flexibility. Compared with other conventional methods of processing, laser cutting and greater adaptability. First, compared with other thermal cutting methods, the same as a thermal cutting process, other methods can not be like a laser beam as the role of a very small area, resulting in wide incision, the heat-affected zone and obvious deformation of the workpiece. Laser cutting non-metallic, and other thermal cutting methods can not be. Laser cutting of the main process. High power density laser beam heating, the surface temperature rose to the boiling temperature of the speed is so fast enough to avoid melting caused by heat conduction, so part of the material vaporized into steam to disappear, part of the material as ejecta from the kerf bottom The auxiliary gas flow blown away. The manager explained the easy manipulation function of this kind of Laser pointer .
When the incident laser beam power density exceeds a certain value, the beam irradiation point inside the material begins to evaporate, and the formation of holes. Once such a small hole is formed, it will absorb all of the incident beam energy as a blackbody. Holes surrounded by the molten metal wall, then the beam coaxial auxiliary air holes around the molten material away. With moving parts, holes synchronous traverse the cutting direction to form a kerf. The laser beam is to continue along the slit cutting-edge radiation, continuous or pulse of the molten material to be blown away from the seam inside. The general use of inert gas melt cutting, replaced by oxygen or other reactive gases, materials under the irradiation of the laser beam was ignited fierce chemical reaction with oxygen to produce another heat source, known as the oxidation of the melt cutting. The working time of Laser pointer can be calculated accurately.
Monday, October 22, 2012
when cutting a remote optical path increases to compensate for optical path shortened
Currently offers a flat cutting machine business Wuhan Fali Lai, Shanghai Unity Prima Company, Shenyang Prima Company, Jinan Zimmer, Wuhan Chutian companies. According to the U.S. laser industry applications magazine "Industrial Laser Solution" 2000 Annual Report statistics: In 1999, total worldwide sales of laser cutting systems (mainly CO2 laser cutting system) is 3325 units, a total of $ 1.174 billion. According to incomplete statistics, China's current annual production of CO2 laser cutting machine nearly 100 units, a total of 150 million yuan. Although the trend of rapid development of laser cutting, but the level of application of a larger gap with developed countries. General Manager had a technical discussion meeting to decide the technical program of laser pointer .Flying optics cutting machine to add x, y direction of the optical system of compensation. That is, when cutting a remote optical path increases to compensate for optical path shortened; the other hand when cutting near the optical path is reduced, the optical path to increase compensation in order to maintain the same optical path length. Cutting perforation technology: any kind of thermal cutting technology, except for a few cases from the beginning edge of the board, in general, must wear a hole in the board. Compound earlier in the laser punching machine is the first out of a hole punch, and then use the laser from the hole to start cutting. No stamping device for laser cutting machine, there are two basic methods of perforation: blast hole: (Blast drilling), materials by continuous laser irradiation to form a pit in the center, then the laser beam coaxial with the oxygen flow soon remove the molten material to form a hole. Generally the size and thickness of the hole, blasting perforation thickness of half the average diameter, so the thicker the plate the larger diameter hole blasting, and not round, not in the higher parts to use (such as oil sieve tube seam ), can only be used on waste. Furthermore, since the oxygen pressure used in piercing and cutting the same time, a large splash.
Collimator. This is a commonly used method, namely CO2 laser output plus an expanded beam collimator for processing, after the beam expander larger beam diameter, divergence angle becomes smaller, so that within the scope of work in cutting the proximal and distal focused beam size close to the front line. Increase in the cutting head of an independent movement under the lens axis, it nozzles to the surface and control the distance (stand off) the Z-axis are two independent parts. When moving the machine table or moving the optical axis, the beam axis from proximal to distal F also move, so after focusing the beam spot diameter is consistent throughout the processing area. Shown in Fig. Control focusing mirror (usually metal reflector focusing system) pressure. If the focused beam size before leaving the smaller focus spot diameter becomes larger, the automatic control of pressure to change the focus of curvature smaller focal spot diameter. The school will need more laser pointer in large quantity.
Collimator. This is a commonly used method, namely CO2 laser output plus an expanded beam collimator for processing, after the beam expander larger beam diameter, divergence angle becomes smaller, so that within the scope of work in cutting the proximal and distal focused beam size close to the front line. Increase in the cutting head of an independent movement under the lens axis, it nozzles to the surface and control the distance (stand off) the Z-axis are two independent parts. When moving the machine table or moving the optical axis, the beam axis from proximal to distal F also move, so after focusing the beam spot diameter is consistent throughout the processing area. Shown in Fig. Control focusing mirror (usually metal reflector focusing system) pressure. If the focused beam size before leaving the smaller focus spot diameter becomes larger, the automatic control of pressure to change the focus of curvature smaller focal spot diameter. The school will need more laser pointer in large quantity.
Sunday, October 21, 2012
They want the battery of laser pointer can be used longer
They want the battery of laser pointer can be used longer.
Turn off the power with a soft paper shaft clean, and then drops of sewing machine oil, and repeatedly move the print head to the dirt washed out wipe Finally, clean the shaft drops on oil, moving the print head so that it evenly distributed, boot to work properly. Expert Tip: To extend the life of the printer, the printer should pay attention to dust and ambient temperature, it provides a smaller dust temperature (ambient temperature of 10-40 degrees is too high and too low is not good) appropriate, The sun can not direct the place. Printer no response. Phenomenon: after the print command is issued, the printer no response, the system prompts the printer is online and cable connection is working. The forever life time of laser pointer will be the best.
Reasons: the cause of the malfunction caused by the printer does not print there are many, there are aspects of the printer, there are computer-related. The following were introduced: exclude: 1. Check whether the printer is online. In most printer "OnLine" button next to them indicate the online status lights, under normal circumstances, the on-line lights should be lit state. If the light is not lit or is flashing, then the online is not normal, the focus on examination of the printer is connected, the printer power switch is turned on, the printer cable is properly connected. If the online light properly, turn off the printer, then open, see print a test page. The manufacturer will definitely try the best to enhance the laser technology of laser pointer .
Check the printer is set as the default printer. Click the "Start - settings - the printer, check the printer icon on whether there is a small black hook, and then set the printer as the default printer. If the "Printers" window, use the printer, then click the "Add Printer" icon, then follow the prompts to install. Check the current printer is set to pause printing. The method is in the Printers window, right-click the printer icon in the drop-down menu that appears, check the "pause printing" option on whether there is a small hook, if you select "Pause Printing" Please cancel the option. The long life time of laser pointer can ensure the good and long time use and operation of the laser pointer for the customer.
For laser printers, the cause of such failure may be the developer roller is not bothered by the toner (developer roller DC bias is not added), it could be the drum is not grounded, so that the negative charge can not be gravitropism release, the laser beam not work on the drum. In addition, the laser printer drum does not rotate, there will be no images generated and spread to the paper. Disconnect the printer power and remove the toner cartridge, open the lid on the notch, make a mark in the non-light-sensitive parts of the photosensitive drum, reload the machine. Switched on for a while, then remove the check mark whether the move can determine the drum is working properly.
Turn off the power with a soft paper shaft clean, and then drops of sewing machine oil, and repeatedly move the print head to the dirt washed out wipe Finally, clean the shaft drops on oil, moving the print head so that it evenly distributed, boot to work properly. Expert Tip: To extend the life of the printer, the printer should pay attention to dust and ambient temperature, it provides a smaller dust temperature (ambient temperature of 10-40 degrees is too high and too low is not good) appropriate, The sun can not direct the place. Printer no response. Phenomenon: after the print command is issued, the printer no response, the system prompts the printer is online and cable connection is working. The forever life time of laser pointer will be the best.
Reasons: the cause of the malfunction caused by the printer does not print there are many, there are aspects of the printer, there are computer-related. The following were introduced: exclude: 1. Check whether the printer is online. In most printer "OnLine" button next to them indicate the online status lights, under normal circumstances, the on-line lights should be lit state. If the light is not lit or is flashing, then the online is not normal, the focus on examination of the printer is connected, the printer power switch is turned on, the printer cable is properly connected. If the online light properly, turn off the printer, then open, see print a test page. The manufacturer will definitely try the best to enhance the laser technology of laser pointer .
Check the printer is set as the default printer. Click the "Start - settings - the printer, check the printer icon on whether there is a small black hook, and then set the printer as the default printer. If the "Printers" window, use the printer, then click the "Add Printer" icon, then follow the prompts to install. Check the current printer is set to pause printing. The method is in the Printers window, right-click the printer icon in the drop-down menu that appears, check the "pause printing" option on whether there is a small hook, if you select "Pause Printing" Please cancel the option. The long life time of laser pointer can ensure the good and long time use and operation of the laser pointer for the customer.
For laser printers, the cause of such failure may be the developer roller is not bothered by the toner (developer roller DC bias is not added), it could be the drum is not grounded, so that the negative charge can not be gravitropism release, the laser beam not work on the drum. In addition, the laser printer drum does not rotate, there will be no images generated and spread to the paper. Disconnect the printer power and remove the toner cartridge, open the lid on the notch, make a mark in the non-light-sensitive parts of the photosensitive drum, reload the machine. Switched on for a while, then remove the check mark whether the move can determine the drum is working properly.
Friday, October 19, 2012
The bulk purchase can save the cost of laser pointer
The bulk purchase can save the cost of laser pointer .
In 1962, the first human use of laser irradiation the moon, the moon's distance from the Earth about 38 million km, but the laser spot at the lunar surface less than two kilometers. If condenser works well, seemingly parallel light beam searchlight shooting the moon, according to its spot diameter will cover the entire moon. Before the invention of the laser, artificial sources of high-voltage pulsed xenon lamp brightness maximum, comparable with the brightness of the sun, while the ruby laser laser light, xenon lamp can exceed several hundred billion times. Because the laser is extremely bright, they were able to illuminate distant objects. Ruby laser beam emitted illumination produced on the moon is about 0.02 lux (light intensity units), the color red, visible laser spot. If the most powerful searchlight with power moon light, the illumination produced only about a trillionth of Lux, the human eye can not detect. The main reason is the high brightness of laser light directed. A large number of photons concentrated in a very small space within the injection, the natural high energy density. Bulk purchase of laser pointer is an important step.
The color of light from the light wavelength (or frequency) decision. A certain wavelength corresponding to the certain color. Wavelength distribution of sunlight in the range of about 0.76 microns to 0.4 microns, the corresponding color from red to purple, 7 colors, so the color of sunlight alone. Single-color light emission as monochromatic light source that emits a single wavelength of light. Such as krypton lights, helium lights, neon, hydrogen lights are monochromatic light sources, only a certain color of light emission. Although monochromatic single wavelength light source, but there is still a certain distribution. If only transmit red neon, color is very good, known as the highest monochromatic wavelength range of the distribution is still 0.00001 nm, so the neon red light, if carefully identified dozens of red still contains . Thus, the optical radiation of wavelength range of the more narrow distribution, the better the color. The unit price can reflects the quality of laser pointer to some extent.
The material test of laser pointer cannot be cancelled
The parameter of laser pointer is important to the customer. It uses high-energy, short pulse laser, the aging, damaged skin tissue to be vaporized instantly, without harming surrounding tissue, the treatment process is almost no bleeding, and precise control of the role of depth.
In 1962, the first human use of laser irradiation the moon, the moon's distance from the Earth about 38 million km, but the laser spot at the lunar surface less than two kilometers. If condenser works well, seemingly parallel light beam searchlight shooting the moon, according to its spot diameter will cover the entire moon. Before the invention of the laser, artificial sources of high-voltage pulsed xenon lamp brightness maximum, comparable with the brightness of the sun, while the ruby laser laser light, xenon lamp can exceed several hundred billion times. Because the laser is extremely bright, they were able to illuminate distant objects. Ruby laser beam emitted illumination produced on the moon is about 0.02 lux (light intensity units), the color red, visible laser spot. If the most powerful searchlight with power moon light, the illumination produced only about a trillionth of Lux, the human eye can not detect. The main reason is the high brightness of laser light directed. A large number of photons concentrated in a very small space within the injection, the natural high energy density. Bulk purchase of laser pointer is an important step.
The color of light from the light wavelength (or frequency) decision. A certain wavelength corresponding to the certain color. Wavelength distribution of sunlight in the range of about 0.76 microns to 0.4 microns, the corresponding color from red to purple, 7 colors, so the color of sunlight alone. Single-color light emission as monochromatic light source that emits a single wavelength of light. Such as krypton lights, helium lights, neon, hydrogen lights are monochromatic light sources, only a certain color of light emission. Although monochromatic single wavelength light source, but there is still a certain distribution. If only transmit red neon, color is very good, known as the highest monochromatic wavelength range of the distribution is still 0.00001 nm, so the neon red light, if carefully identified dozens of red still contains . Thus, the optical radiation of wavelength range of the more narrow distribution, the better the color. The unit price can reflects the quality of laser pointer to some extent.
The material test of laser pointer cannot be cancelled
The parameter of laser pointer is important to the customer. It uses high-energy, short pulse laser, the aging, damaged skin tissue to be vaporized instantly, without harming surrounding tissue, the treatment process is almost no bleeding, and precise control of the role of depth.
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