What Are the Different Types of Night Vision Optics?

Optical instruments are composed of single or multiple optical devices. Optical instruments are mainly divided into two categories: one is a real image optical instrument, such as a slide projector, a camera, etc .; the other is a virtual image optical instrument, such as a telescope, microscope, and magnifying glass.

Optical instruments are a very important component category in the instrumentation industry. They are indispensable tools for observation, testing, analysis, control, recording, and transmission in industrial and agricultural production, resource exploration, space exploration, scientific experiments, national defense construction, and various fields of social life. . In particular, the function of modern optical instruments has become an extension and expansion of human brain nerve functions.

With the growing demand in downstream applications, the market size of the domestic optical instrument manufacturing industry has also shown rapid expansion in recent years. As of the end of 2010, China's optical instrument manufacturing industry

Optical instruments (English: optical instruments) are capable of generating light waves and displaying images, or receiving light waves and analyzing and determining their optical properties. Optical instruments are a very important component category in the instrumentation industry and are industrial and agricultural production

After a long period of development, optical instruments have been formed.

the reason

Fog refers to the "dew-like" substance on the polished surface of optical parts. Some substances are composed of oily ideas; some are composed of water droplets or water and glass react with each other to form deposits; some are composed It is formed by mixing water with oil. Regardless of the cause, there are several reasons for the formation of fog:

1. The surface of the optical part is not clean and rubbed clean, leaving a lot of dust and oil stains. These dust and oil stains will form mist after absorbing moisture in the air.

2. Poor chemical stability of optical glass. Optical glass is mainly silicate glass. It will be hydrolyzed to varying degrees after encountering water. The alkali solution after hydrolysis will absorb the acidic carbon dioxide in the air to form carbonate. Small carbonate crystals accumulate on the glass surface, forming a mist.

3, the oil on the metal parts of the instrument will also spread to the optical parts due to the play to form an oily mist.

4. Fog will also be formed in different temperature environment of the instrument. For example, under high temperature, low temperature and large temperature changes, fog will easily form in optical instruments.

specific measure

1. Reduce the water vapor inside the instrument to prevent water vapor from condensing on the glass surface

To reduce the water vapor inside the instrument and prevent the water vapor from condensing on the glass surface, start from the following aspects. First, you need to assemble under dry conditions or dry the assembled instrument, such as filling with dry nitrogen or air and placing a desiccant. Secondly, in the use of optical measuring instruments, try to control the environment as much as possible, and use optical measuring instruments in places with small temperature changes and low humidity. Finally, choose the warehouse where your instruments are stored. The warehouse where the instrument is stored should be ventilated, sunny, and dry, and a desiccant should be placed in the instrument box. Pay attention to sealing and timely change the drying silica gel desiccant.

2.Use chemical agents to prevent fog

The use of chemical agents for anti-fogging and anti-fogging is a good method for defogging and anti-fogging, which can have a relatively good effect. Anti-fogging agents are mainly some silicone oils, such as methyl silicone oil, 3204, etc. The solution is coated on the surface of the optical part, so that a hydrophobic layer is formed on the surface of the part, which can have a good anti-fog effect ^[1] .