Flashlight for banknote inspectionIs the light harmful to human body
The principle of the purple flashlight for banknote inspection is to identify the ultraviolet rays invisible to the naked eye. The authenticity of banknotes, and the sunlight we irradiate daily contains ultraviolet rays. The intensity of ultraviolet rays irradiated by banknote inspection flashlights is much lower than that in sunlight, and will not cause short-term or long-term harm to the human body.
The flashlight used for banknote verification attenuates ultraviolet rays by up to 70%, and ultraviolet rays are also easily attenuated due to distance. The ultraviolet light of 315-400nm in the ultraviolet light of the small flashlight used for banknote detection is called UV-A. The ultraviolet light in this band will only darken the skin. We usually get dark after being in the sun for a long time. We all know that it takes a long time to irradiate the sun to turn black. At least 1 hour of exposure will not respond, and it may tan for a few hours a day, so there is no need to worry about it, what effect will it have on the skin? .
The so-called carcinogen is in the band of 280-315nm, called UV-B. There is absolutely no light in the UV-B band in the regular money-checking flashlights on the market, so there is no such thing as cancer. Secondly, even if UV-A can tan the skin, how many of us will use a purple flashlight to irradiate our skin for a few hours a day? Therefore, using a money-checking flashlight is basically harmless to the human body, but it is best not to shoot the money-checking flashlight directly at yourself.
How to use the money detector flashlight
There are two types of money detector flashlights, one is violet light and the other is infrared laser.
1. Violet flashlight
The principle is that the purple light seen by the human eye is not an effective component, but the invisible ultraviolet rays are effective because It is an ordinary fluorescent lamp not a laser, so the spectrum is wider, and only people can see the visible purple light. There are marks printed with special fluorescent ink on the coins, which are the anti-counterfeiting marks we often say. For example, the watermark of RMB is darkly printed on the top of the denomination of the banknotes. This kind of mark will emit light green fluorescence under the excitation of ultraviolet rays. As soon as the banknote lamp is illuminated, the anti-counterfeiting sign will come out.
2. Red flashlight
The infrared laser emitted by the infrared laser has a wavelength between 750-1500nm, so the laser for money detection is a semiconductor laser, The power is relatively small and does not harm the human body. The principle is also to use the 100 yuan sign where there is fluorescence, and green light will appear on the fluorescence when infrared rays shine.
Declare: The above methods are derived from the program system index or shared by netizens. They are for your reference only and do not represent the research views of this website. sex and authority.
