What does a laser beam do?
The apparent brightness of laser beam spot depends on laser power, surface reflectance and color response of human eyes. For the same amount of light power, green lasers appear brighter than other colors because the human eye is most sensitive to low light levels in the green region of the spectrum (wavelengths 520-570 nm). The most sensitive dye rhodopsin has a peak response at 500 nm. Sensitivity decreases at red or blue wavelengths. After all, even more powerful lasers don't seem to permanently blind flies. The flies get too hot and leave before they can cause eye damage (I used 532nm DPSS with 50-150MW and 455nm diode with 500-1500MW). A lot of sense. The fly's compound eye consists of a large number of very small lens units, each focusing on its own receptor. The elements of the eye are not optically "good" and have low angular resolution.
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In addition, green Rechargeable Laser Pointer have moderate power (enough to perform Rayleigh scattering in clean air) and are relatively cheaper than compact and blue ones (the human eye is insensitive to blue, but the blue laser is green). A little more than 1.) . The apparent brightness of laser beam spot depends on laser power, surface reflectance and color response of human eye. For the same amount of light power, green lasers appear brighter than other colors because the human eye is most sensitive to low light levels in the green region of the spectrum (wavelengths 520-570 nm). The sensitivity of red or blue wavelengths will be reduced. Security camera sensors have become more sophisticated and sharper. Good, the world is a very difficult place for non-deliverers who engage in burglary and shoplifting. However, the laser pointer is a tool used by burglars as an intrusion tool. In Japan, the sale of products capable of producing 1 mW or more is regulated. However, super-strong laser Pointers of 100 mW or more are used for some commercial purposes, such as construction, and are mainly available through overseas mail order.
2021-11-04 08:39:40
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