Night vision technology is a special technology to study the generation, enhancement, conversion, transmission, storage and processing of optical image information at night or under low illumination. It is an edge discipline developed in recent decades on the basis of physics, electronics, electronic optics, physiological optics, engineering optics, fiber optics, vacuum technology, semiconductor technology, and computer technology. It is a comprehensive technology integrating optics, mechanics, electronics, and computers. It is one of the three emerging high technologies in the field of optics since the 1960s: laser technology, fiber optics technology and low-light night vision technology.

In the process of human origin, formation and development, through long-term natural selection, the living habits of day activity and night sleep have been formed, and the basic characteristics of human visual system have also been shaped. Although the human eye is the best optical sensor in the world, it also has certain limitations and defects. It can only detect light with a certain brightness (10~100000 lux), can only distinguish images with a certain spatial frequency, and can only receive light information in the visible spectrum (360~760 nm). In other words, the human eye can not only see ultraviolet images and infrared images, but also can not see or clearly see visible light images without sufficient intensity of artificial lighting or natural lighting. Generally speaking, optical information is the information with the largest capacity, the highest frequency, the fastest speed and the most intuitive. The amount of information that humans can obtain through the human eye and visual system is far greater than the sum of other sensory systems such as the auditory system, the olfactory system, and accounts for about 80% of the amount of information that human sensory system can obtain. These limitations and defects of human eyes largely limit the time and space scope of human activities, as well as the ability to understand and transform the world. The contemporary information society urgently needs to improve, expand and extend the functions of the human eye, especially the ability to obtain information under low illumination conditions. Thus, it has promoted the development and industrialization of low-light level night vision technology. The fundamental task of night vision technology is to research and manufacture the "night vision mirror", which is similar to the human eye's telescope and microscope, and expand the functions of the human eye in the following three aspects: improving the human eye's detection ability of weak light energy (reducing the brightness threshold), improving the human eye's resolution ability of weak light information spatial distribution (improving the human eye's resolution ability of weak light information spatial frequency), and expanding the detection range of the human eye to the spectral band (be able to accept the ultraviolet and near-red light information beyond the visible light). In a word, low-light night vision technology can make people see and see clearly at night or in dark conditions, like day, and can get enough light information to enhance or convert the image that can't be seen or can't be seen into the image that can be seen by human eyes. This technology increases the time and space range of human activities and the ability to obtain information and images. It extends the time of human activities from day to night and from bright environment to dark occasions without artificial lighting. In short, the night vision technology is the technology of making the eye aid "night vision eye".

Night vision technology has a wide range of applications in military, industry, agriculture, scientific research, medicine and health and other fields, especially in the field of military demand is the driving force for the development of night vision technology. Modern war requires all-weather operations to increase the sudden nature of war and the scope of time and space. It is necessary to rely on night vision technology to conduct all-weather observation and monitoring of the entire battlefield at night or under weak illumination conditions.

In addition, the public security, armed police, customs and other departments are one of the most important means in the night patrol, detection, evidence collection, law enforcement, security anti-smuggling, drug collection and anti-pornography operations, in the night monitoring and security work of banks, treasury, cultural relics, important materials and warehouses, in the fight against criminals, and in the anti-spying and national security work. In the industrial field, where it is necessary to work in a dark place, Night vision technologies such as photosensitive chemical industry, seabed resource survey, underwater part monitoring of offshore oil drilling platforms, and ocean fishing are the most important tools. In the field of medicine and health, such as the acquisition, enhancement and processing of X-ray images, the general survey of cancer, such as early diagnosis, and scientific research, such as remote sensing and telemetry of satellites, night observation and recording of astronomical galaxies and weak stars, the study of plant growth laws at night, and the study of living habits of night moving objects, night vision technology is even more indispensable.

Fiber plate can be applied as the input and output window element of the image applied to the image intensifier of low-light-level night vision instrument. Fiber optic inverter can be applied as the output window element applied to the image intensifier of the low-light-level night vision instrument.

HONSUN has good cooperation with word famous enterprise specialized in image intensifier in France, Netherlands, Russia, and China etc..