Technical principle
The infrared night vision camera is mainly used to actively project infrared light onto an object in an infrared environment without visible light or low light, and the infrared light is reflected by the object and then enters the lens for imaging. At this time, what we see is a picture made by infrared light reflection, instead of the reflection of visible light. At this time, we can take pictures that are invisible to the naked eye in a dark environment.
Light is an electromagnetic wave whose wavelength range is from a few nanometers (1 nm = 10-9 m) to about 1 mm (mm). What is visible to the human eye is only a part of it. We call it visible light. The wavelength range of visible light is 380nm~780nm. The wavelength of visible light is divided into red, orange, yellow, green, cyan, blue and violet, and the wavelength is shorter than violet. It is called ultraviolet light, and the wavelength is longer than red light, called infrared light. Infrared light is usually divided into three parts: near, medium and far infrared. The near-infrared refers to a wavelength of 0.75 to 3.0 microns; the mid-infrared refers to a wavelength of 3.0 to 20 microns; and the far-infrared refers to a wavelength of 20 to 1000 microns. Since infrared light belongs to non-visible light, it cannot be seen by the naked eye in space. Therefore, it is widely used in the form of night vision monitoring that requires concealment in the form of an infrared light that actively emits infrared light by an infrared light emitting diode. Traditional low-light lighting night vision monitoring. Infrared lamps have different powers and two wavelengths of 715 and 850 nm. The difference in wavelength determines the distance and effect of infrared lamps.
Main components
1, infrared light board
After being energized, the current is transmitted through the PCB circuit board to an infrared wick that converts electrical energy into light energy and thermal energy, and infrared light is emitted by the infrared light and projected onto the object.
2, the lens
Collecting the infrared light reflected by the infrared light after being projected onto the object, after being processed by focusing processing, transmitted to the camera board
Optical components (CCD/CMOS).
3, camera motherboard
The photosensitive component (CCD/CMOS) converts the received infrared light image from light to current signal and transmits it to each working IC electronic component through the PCB circuit board for processing, and finally converts it into a video signal output through the micro processing chip (DSP).
4, the camera shell
The combination of the above components is fixed, and the above components are protected to achieve waterproof, dustproof, and anti-shock effects.
At the same time make the whole product more beautiful.
