Xi 'an siduo photoelectric instrument co., LTD., formerly xi 'an sida photoelectric machinery research institute, was founded in 1992, is a private technology enterprise with high-tech personnel as the main body. Mainly engaged in plastic optical components research, development and production. , thanks to the development of business institute in 2000, restructured into limited liability company, business in addition to the research and development, the production of resin optical element, special extended to a magnifying glass, microscope, special telescope, high-power LED lens and light cup, camera lens, the viewfinder, aspheric lens, PC lens, glass partition board, corrective optical films, and optical plastic mold development and production. And trademark the company. The company holds 14 patents. The factory built by the company is located in hongqing industrial park in the eastern suburb of xi 'an, an ancient city in China.