The steps of the quality control of laser pointer

The sampling inspection is one of the steps of the quality control of laser pointer .
The large-screen command and personalized helmet display system and other fields, in the large screen to show a more realistic, more brilliant and dynamic image, resulting in an unexpected shock. Future display may be laser technology to replace ordinary movie projector's color space is only able to cover the human eye can identify 33% of the color space, while the laser movie projector up to 70%, even 90%. High luminous efficiency of the laser projection, traditional projection lamp more than halogen bulbs, only 2-3% of the energy is converted to light, the other into heat, but also more afraid of vibration. Therefore, the power consumption of the laser projection is relatively small, it does not produce fever. At room temperature life-expectancy of up to 100,000 hours, calculate the room temperature lifetime at high temperature aging test up to one million hours. In this case, the manufacturer has not enough time to inspect every laser pointer .
Therefore, it is a long ordered high-reliability products. Described above on the development of display technology and its principles, the development will be popular in the hot, also looking forward to a breakthrough in display technology improve. Chapter VI laser applications in precision measurement. Laser because of the excellent monochromaticity, directionality and high brightness, making it in many ways be applied. For example, the laser processing industry used to complete drilling, welding, cutting, rapid prototyping, laser scalpel made in medicine, laser myopia treatment apparatus, laser irradiation instrument, in the IT industry, a large number of used light communications, optical storage, optical information processing of light. The probability theory is the basis of sampling inspection of laser pointer.The hard external force might influence the normal use and operation of laser pointer 
From (6-10) shows that the measurement accuracy depends on the size measurement, and measurement accuracy. Its differential treatment, the random error of the instrument theory and the available diffraction measurement of changes in the amount of error where the laser output wavelength to observe the position error of the screen, the measurement error for the location of the diffraction dark stripes. He-Ne laser wavelength stability better than the general 10-6, can not be considered, the diffraction measurement error and the measurement error. Under normal circumstances, and no more than 0.1%. If you take = 1000mm = 0.63μ, k = 3, = 10mm, the former type to get δb = ± 0.3μ. The slit width b = 0.19mm, δb / b = ± 1.6 × 10-3. The core function of laser pointer will be demonstrated.It is especially for this kind of laser pointer in torch shape.Diffraction for diffraction measurement system is usually only two, a single slit, a hole. Following from the introduction of a single slit and circular aperture diffraction measurement principle [29] starting a comprehensive discussion of the laser diffraction measurement method. Single-slit diffraction measurements.