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2022-05-10

laser point light sourceAn electric light source that uses excited particles to emit light under the action of stimulated radiation. It is a coherent light source. Since T.H. Mayman of the United States in 1960 made the ruby laser, there have been hundreds of laser point light sources, and the output wavelength ranges from short wavelength ultraviolet to far infrared.

Laser point sources can be divided into four categories according to their working substances (also known as active substances): solid laser sources (crystals and neodymium glass), gas laser sources (including atoms, ions, molecules and excimer), liquid laser sources (including organic dyes, inorganic liquids and chelates) and semiconductor laser sources.

characteristics of laser point source

laser point light sourcehas the following characteristics:

① Good monochromaticality. The color of the laser is very pure, and the monochromativity is more than 10 times higher than that of the ordinary light source. Therefore, the laser light source is an excellent coherent light source and can be widely used in optical communication.

② Strong directionality. The divergence solid angle of the laser beam is very small, in the order of milliradians, which is 2 to 3 orders of magnitude smaller than the divergence angle of ordinary light or microwave.

③ High brightness. The radiation brightness at the laser focus is 10 to 100 times higher than that of ordinary light.

The main advantages of laser point light source are high brightness, good color, low energy consumption, long life and small size. At the same time, the laser is the only light source with five advantages, and the LED light source is also very powerful, but it is difficult to break through the brightness, so it will never be at the same level as the laser light source. Of course, these advantages cannot be fully demonstrated at present, and the cost of laser light sources is also high. Especially when realizing color display, the problem that the brightness and life of the green light source do not match the red and blue is currently plaguing this industry.

laser point light sourceApplication

Laser point light sources are widely used in various fields of industrial and agricultural production and science and technology, such as laser processing (cutting, welding, drilling, heat treatment, marking), nuclear fusion, isotope separation, medical instruments (scalpel, electrocoagulation), Detectors, optical fiber communication light sources, holographic light sources, stage art light sources, laser video recording, laser fax, laser typesetting printing, optical computers, laser weapons, etc.

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