Use of colored optical glass materials, optical processing and surface through vacuum coating, and it has a specific spectral characteristics.
    Products include black and white, color, three categories of optical effects filters, specifically a red filter, yellow filter, blue filter, green filter, orange filter, blue filter, purple filters, infrared filters, etc. 40 kinds of products, the specifications are M25, M27, M28, M30, M30.5, M37, M43, M46, M49, M52, M55, M58 and so on. If users need to special requirements of optical filters, please call.