Laser ranging technology in space applications. With the development of space technology and aerospace industries. Space distance measurement has become an important field of space research. In space, the conventional radar range vulnerable to energetic particles and electromagnetic interference, low measurement accuracy, can not meet the requirements of high precision measurement. Space of thin air, sudden changes in temperature, and ultrasonic distance measurement can not be carried out. Therefore. Measure the spatial distance requires a suitable space environment, anti-interference ability and high accuracy of the ranging method. The laser ranging technology is an automatic non-contact measurement method is not sensitive to electromagnetic interference, anti-interference ability, high measurement accuracy. The raw material of green laser pointer includes the laser module, laser diode, body material or LED indicator and so on.
Compared with the general optical ranging technology, it has the advantages of convenient operation, simple system, and day and night work. Compared with the radar ranging, laser ranging has a good anti-jamming and high precision. Space in duplicate ranging at the same time, a thin laser beam scanning, and target distance, angle and speed of information, which is the laser radar. The lidar can achieve many of the traditional Lei Dada less than the performance requirements. Divergence angle of the laser energy is concentrated. Able to achieve extremely high detection sensitivity and resolution; its extremely short wavelength makes the size of the antenna and the system can be very small, these are the traditional radar incomparable. Compared with microwave radar, laser range finder directional, small size and light weight. There is the specific and professional standard for inspecting the quality of the raw material of green laser pointer .
Ideally suited for carrying space in a spacecraft target distance measurement. The laser ranging technology combines laser technology, and photon detection technology, signal processing technology, a number of technical Ranging accuracy is high. Large measurement range, high reliability, to meet the space the target precision, the odometry ranging requirements. Has been applied widely in the field of space measurement. Background and significance. Laser is a nature did not exist, due to the shock issue with good directionality and high brightness, good color and good coherence properties of light, the laser characteristics: directionality - of ordinary light ( The sun, incandescent or fluorescent) light, in all directions and the direction of the laser light can be limited to less than the solid angle of several milliradians. It is as the record of green laser pointer .
This allows the illumination in the direction of irradiation to raise a million times. Laser collimation, orientation and distance measurement is to use a good direction this feature. - Laser brightness of the brightest light source, only the hydrogen bomb explosion instantly intense flash can be comparable to it. Sunlight brightness is about 103 W / (cm 2 ? steradian), a high-power laser output brightness of the sun from 7 to 14 orders of magnitude higher. Thus, although the total energy of the laser are not necessarily great, but since the energy is highly concentrated, it is easy to generate high pressure and tens of thousands of degrees Celsius or even millions of degrees Celsius in a tiny point. Laser drilling, cutting, welding and laser surgery is to use this feature. The raw material of green laser pointer can be stored in the warehouse for the use of the manufacturer.
Monochromatic - the light is an electromagnetic wave. The color of light depends on its wavelength. Ordinary light source light emitted typically contain a variety of wavelengths, the mixing of the various colors of light. Sunlight contains red, Tang, yellow, green, green, blue, purple seven colors of visible light and infrared light, UV and visible light. The wavelength of a laser, only concentrated in a very narrow spectral band or frequency range. Such as helium-neon laser wavelength of 632.8 nm, the wavelength range of less than one ten thousandth of nano. Monochromaticity of the laser, for precision instruments to measure and motivate some chemical reactions and other scientific experiments provide a very favorable means. It is the CR2 battery of green laser .
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