Important indicators for the purchase of digital night vision binoculars
What are the important parameters of the digital night vision device? What indicators should be inspected when purchasing a digital night vision device? This article will give a detailed introduction to these two main issues. I hope it can help friends who are interested in digital night vision devices.
Before introducing the important parameters of the digital night vision device, first introduce the concept and working principle of the digital night vision device.
What is a digital night vision device? Digital night vision device is also known as digital night vision device, and its English name is Digital Night Vision. Most digital night vision devices use high-sensitivity CCD (or CMOS) image sensors to process and convert the low-illuminance light into electrical signals, which are then transmitted to microdisplays, and then the converted visible image light is viewed through the eyepiece.
What is the working principle of digital night vision device? The working principle of the digital night vision device: darker light --> CCD (CMOS) photoreceptor --> CPU (processed by software) --> built-in display screen --> visual image. Instead of using photomultiplier tubes, digital night vision digitizes an image of available light, replicates it in software, and pushes it back into a viewable image.
1. Important parameters of digital night vision device - level (image sensor)
Different from traditional infrared night vision devices, digital night vision devices do not use image intensifier tubes as image intensifiers, but use low-illuminance CCD or CMOS photosensitive sensors as image intensifiers. The low-illuminance CCD (CMOS) can identify very dark light, and then convert it into a visible digital signal, which is displayed on the LCD screen inside the night vision device. As the core component of digital night vision device, CCD (CMOS) photosensitive sensor is the "heart" of digital night vision device, and its height directly determines the level of digital night vision device. At present, the CCD (CMOS) photoreceptor levels of digital night vision devices are divided into A1, A2, and A3, which correspond to the first generation of digital night vision devices, the second generation of digital night vision devices and the third generation of digital night vision devices.
The current second-generation digital night vision devices use CMOS-640X480 resolution image sensors, such as YUKON Ranger RT 6.5x42#28047, PULSAR pulsar 860RT#78093, etc. The image sensor of the third-generation digital night vision device is a Sony CCD with a resolution of HD 1080P 30Fs. The brands and products of the third-generation digital night vision device in China include the Russian RavalerPV-780, the American ORPHA Alpha DB550, and the German Dallmeyr150RT, etc.
