Coligh is a Chongqing-based custom optical filter manufacturer focused exclusively on hard coating standard fluorescence filters, precision optical filters and optical lens. Chongqing is one of four famous optics centers in China. This enables Coligh to have a strong optical atmosphere and optical environment technical support. Most of our employees worked in Coligh for more than 8 years, this enables us to produce the specifications according to customer’s needs. With the advanced and adept polishing, coating, and inspection equipment, customers’ optical components are fabricated consistently and effectively.