How Does The Night Vision Device See The Dark Environment Clearly?
Sales Engineer: Gloria Gao
Email: gloria@bri-elec.com
WhatsApp: 0086-199 2997 5286
The current night vision devices are mainly divided into three categories, namely active infrared night vision devices, thermal imaging infrared devices and low-light night vision devices.
The working principle of the active infrared night vision device is to use photoelectric conversion technology to irradiate the emitted infrared beam to the target, and then convert the infrared image reflected by the target into a visible light image. The working principle of the active infrared night vision device is to use photoelectric conversion technology to irradiate the emitted infrared beam to the target, and then convert the infrared image reflected by the target into a visible light image.
Therefore, there was a thermal imaging infrared camera, which was also called a thermal imager. The working principle of the thermal imager is to convert the infrared radiation on the surface of the object into a visible image through the temperature difference between the heat emitted by the object and the background. Since the thermal imager has the function of temperature measurement, it can use the characteristics of the temperature distribution on the surface of the object to perform pseudo-color coding on the grayscale image. Simply put, it is to convert the invisible infrared energy emitted by the object into a visible thermal image. Different colors represent different temperatures of the measured object. Moreover, the thermal imager is not affected by obstacles such as smoke and trees, and can work day and night. It is currently the most advanced night vision observation instrument mastered by humans. However, due to the high price and the cost of tens of thousands of yuan, it is only commonly used in military affairs at present.
The third type: low-light night vision device, the "twilight" in the name refers to natural light such as moonlight and starlight in nature, and its imaging mainly relies on a component called an image intensifier. When on the surface of the target, the image intensifier can enhance the weak target, and the enhancement ability can even be magnified to hundreds of thousands of times. It can be said that the low-light night vision device is a special telescope with its own intensifier. Nowadays, it is the most widely used in the fields of military criminal investigation and night monitoring. At the same time, the low-light night vision device also has a disadvantage, that is, it cannot work normally during the day.
Xi'an Brilliance Optoelectronic Co., Ltd. specializes in the research and development, production and service of night vision imaging technology, thermal imaging technology, laser ranging and related optoelectronic products, and can provide customers with comprehensive product development solutions and technical support services. If you want to know more, please click our contact information.
