46.5mm Solar Filter Cap Film Cover Membrane Lens

Optical instruments are composed of single or multiple optical devices. Optical instruments are mainly divided into two categories, one is optical instruments that form real images, such as slide projectors, cameras, etc.; the other is optical instruments that form virtual images, such as telescopes, microscopes, magnifying glasses, etc.
Optical instruments are a very important component category in the instrumentation industry, and are indispensable tools for observation, testing, analysis, control, recording and transmission in various fields of industrial and agricultural production, resource exploration, space exploration, scientific experiments, national defense construction and social life. . In particular, the function of modern optical instruments has become the extension and expansion of the function of human brain.
With the growing demand in downstream applications, the market size of the domestic optical instrument manufacturing industry has also shown a rapid expansion in recent years. By the end of 2010, there were 395 enterprises above designated size in my country's optical instrument manufacturing industry. In 2010, the country produced a total of 30.0853 million optical instruments, a year-on-year increase of 25.45%, and an increase of 35.99 percentage points over the same period of the previous year; the entire industry achieved sales revenue of 53.167 billion yuan during the year, a year-on-year increase of 19.26%.
In my country's optical instrument market, the entry and success of multinational enterprises has become an indisputable fact, and international famous manufacturers have entered their products into the Chinese market one after another. Although some domestic enterprises have gradually risen and occupied a relatively leading position in the optical instrument manufacturing market, most of them have poor research and development capabilities. Compared with foreign counterparts, high-end products are still at a technological disadvantage. An optical instrument is a type of instrument that can generate light waves and display images, or receive light waves and analyze and determine their optical properties. Optical instruments are a very important component category in the instrumentation industry, and are indispensable tools for observation, testing, analysis, control, recording and transmission in various fields of industrial and agricultural production, resource exploration, space exploration, scientific experiments, national defense construction and social life. . In particular, the function of modern optical instruments has become the extension and expansion of the function of human brain.