1. The minimum illumination given by the camera. What is the minimum illumination concept here? The video signal produced by the camera is nominally 1V, the standard value is 0.7V, and the video signal value at the lowest illumination is 1/3-1/2 standard. Therefore, the image of the camera at the lowest illumination will never be "like a white."
3. While giving the minimum illumination of the camera, the required value of the aperture F is also given, and the zoom lens generally only gives the maximum value of 1:F, that is, the minimum value of the aperture F (the maximum size of the aperture), F= f/D, then D is a fixed value, and when the focal length of f is increased by 10 times, F becomes large (that is, the actual size of the aperture becomes small). Luminous flux will be greatly affected.
4. When using an auto iris lens, automatic gain control or automatic electronic shutter camera, the lens aperture F value will also change. For example, if there is a scene near the camera, it will reflect back to the camera, or there will be a light-illuminating camera nearby. At this time, the sensitivity of the camera will be reduced, the size of the auto-iris will be turned off, and the luminous flux will be greatly affected.
5. The protective cover also has an effect on the effect of the infrared light. In the transmission process, the transmittance and reflectivity of the infrared light are different through different media. Different window glass, especially automatic defrost coated glass, has different attenuation of infrared light.
6. Some equipment manufacturers or distributors do not give the irradiation distance of infrared lamps, only the number of powers, which may be less troublesome for production and sales, but this is a very vague concept because of power consumption. In addition to conversion to infrared light energy, there are power supply heat loss, circuit heat loss, light source heat loss, filter glass infrared light efficiency and so on. For infrared lamps of the same power, the irradiation distance may be very different.
With the rapid development of infrared night vision systems, the supply of infrared lamps will also increase, but the red light products are not as easy as some people think, and the conditions in technology, testing equipment and so on are different. I hope users can compare and compare them more. , choose carefully.
Dimming glass is an active switchable glass technology meaning it needs electricity to control. Smart tint glass systems utilize electrochromics, which is the science of darkening a material using electricity. Peeling Smart Blind Film may need to be replaced. Sometimes you can fix Magic Film by rinsing it in soap and water and then using a squeegee to place Projection Film back in place, making sure to smooth out any bubbles first. However, it is generally better to mark a square around the damaged area and cut it away with a razor blade. Applications of dimming projection are not limited to the home, but are especially useful in offices and public places. For office use, the glass partition instant projection screen is used for conference presentation. Public places such as shops, shopping malls or airports are used as advertising displays, dimmer projection is more attractive. Shopping malls can turn the monotonous glass window into a large area of transparent holographic projection film, in high - clarity advertising at the same time, will not hinder consumers through the window to watch exhibits and in-store scenery, the magic display effect greatly attract passing consumers, so as to achieve a better publicity effect.
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