What should laser lovers pay attention to with laser pointers?
The quality of the laser crystal is particularly important. The reason for the low price is the low price, so low-quality laser crystals are manufactured in large quantities. Although sloppy laser pointers are sold very cheaply, they are always dangerous at first. People are choosing sloppy laser crystals. A sloppy laser pointer is not as bright as a real laser pointer with the same output range. Sloppy laser crystals are usually made without infrared lasers. Infrared rays are quite dangerous, but people don’t notice it until they hurt their eyes. Therefore, special attention should be paid to whether the laser crystal passes through the infrared filter. The infrared filter with a green laser pointer is not only much brighter than a sloppy laser, but also the safest choice for laser lovers.
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Wavelength
The apparent brightness of a projector illuminated by a red, green, blue-violet or high powered laser pointer depends not only on the laser output and surface reflectivity, but also on the color of the human eye. For example, the human eye is most sensitive to green light with a wavelength between 520 and 570 nm in the visible spectrum, which makes red or blue less sensitive, while green light of the same wattage is brighter than other colors. In addition, many people will face this problem. What is the "no power" at night when the star pen is used correctly during the day? It is the semiconductor laser that produces the medium with reference to the star-shaped spring. The various characteristics of semiconductors are very sensitive to temperature. The laser pointer does not work at low temperatures. Just pass the laser pointer for a short time, and the temperature will exceed 20 degrees. If not, the pen can work normally, maybe it is related to replacing the battery.
2021-11-30 11:56:57
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