The laser particle size analyzer is an instrument for analyzing the particle size by the spatial distribution (scattering spectrum) of the diffracted or scattered light of the particles. According to the stability of the energy spectrum, it is classified into a static light scattering particle size analyzer and a dynamic light scattering green laser pointer particle size meter. As we all know, laser particle size analyzer is an optical measuring instruments, lasers, detectors is one of the important components, is an important optical components. Currently, there are two types of lasers: one for the last century 60's application of gas lasers - helium-neon laser, one is since the 80s of last century began to develop, so far technology breakthroughs in solid-state lasers.
With the development of the times and the advance of technology, the optical components in the laser particle sizer will be replaced by more promising components with more advanced technology content. If we judge things with solidified thinking, it will be biased. In other words, when we think good things, to today may have been greatly behind, and technological progress, and our understanding of the need to follow up. The following is to explore the 50mw laser pointer particle size analyzer among the "laser" type, development and characteristics, in order to give the purchase of laser particle size analyzer to provide a little effective help.
Semiconductor lasers, also known as laser diodes (LD), is the twentieth century eighties semiconductor physics one of the latest achievements. The advantage of the conductor laser is small volume, light weight, high reliability, long life, low power consumption, in addition to semiconductor lasers are low voltage constant current power supply, low power failure rate, the use of safety, low maintenance costs. So the application field is expanding day by day. At present, the number of semiconductor burning laser pointer in the first use of all lasers, some important applications in the past, other commonly used lasers, semiconductor lasers have been gradually replaced. Its application areas include optical storage, laser printing, laser phototypesetting, laser ranging, bar code scanning, industrial detection, test and measurement equipment, laser display, medical equipment, military, security, field detection, Laser level and a variety of marking line positioning.
Previously, the disadvantage of semiconductor lasers is that the laser performance is affected by temperature and the beam divergence angle is large (usually between several degrees to 20 degrees), so it is poor in directionality, monochromaticity and coherence. But with the rapid development of science and technology, the current performance of semiconductor lasers has reached a high level, and the beam quality has also been greatly improved. The semiconductor optoelectronic technology with the semiconductor laser as the core will make greater progress and play a greater role in the information society of the 21st century.
In gas lasers, the most common are helium-neon lasers. 1960 in the United States Bell laboratory by the Iranian physicist Jia Wan made. Because of the beam directionality and monochromaticity of the beam emitted by helium-neon 100mw laser pointer, the beam divergence angle is small, can work continuously, so this kind of lasers are widely used, is one of the most widely used lasers, mainly used in holographic Precision measurement, alignment positioning.
He-Ne laser shortcomings are bulky, start and run high voltage, power supply complex, high maintenance costs.