Traditional Culture Encyclopedia - Photography major - Can I take pictures without visible light with an ultraviolet camera?
Can I take pictures without visible light with an ultraviolet camera?
Generally speaking, an ultraviolet camera refers to a camera whose photosensitive device group is sensitive to ultraviolet light, so this camera is a real ultraviolet camera, so if there is no visible light, if there is an ultraviolet light source, it can be sensitive.
But now the anti-ultraviolet camera is called ultraviolet camera in the market. It is because the general ccd is easily disturbed by ultraviolet rays, so the visible light image can be photographed well with an ultraviolet-proof lens. This kind of anti-ultraviolet camera can't shoot without visible light.
The infrared camera in Qilang 2000 mentioned above refers to the camera whose photosensitive device is sensitive to infrared, also known as thermal imaging camera. It has a good application prospect. Because everything has thermal radiation, that is to say, there is no need to bring another light source. Now it is an important direction of night vision.
From the above, we can know that the fundamental difference between them lies in the photosensitive wavelength range of their photosensitive device ancestors. If it is 400nm-750nm visible light, it is a general CCD;; If it is less than 380nm, it is an ultraviolet sensitive device group; Infrared photosensitive device group above 800nm.
I personally estimate that it may be difficult for you to buy UV-sensitive devices in the market, because UV-sensitive devices need UV light to be used, which is not suitable for daily use, and UV light is harmful to cell activity and will cause cancer. (often used for sterilization) but may be used for experimental research. Because of the high energy of ultraviolet light, many materials can be excited to emit visible light.
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