Guangna Technology Co.,Ltd specialize in optical components, concentrate on optical filter production and sales. Our products are widely used in high-precision optical equipment, photographic equipment, machine vision, biochemical analysis, PCR fluorescence, enzyme label, astronomy observation, laser interferometer, etc.Guangna Technology's band pass filters are thin film Fabry-Perot interferometer structure formed by ion beam assist E-beam evaporation deposition technique. The blocking depth can be achieved up to OD6 or higher according to the application needs. The wavelength position of the band pass fiters does not shift due to the proper ion assist process. For imaging system, to improve the imaging quality, most of our filters do not use absorptive glass to assist the blocking, but use all-dielectric multilayer coatings. A low auto-fluorescence substrate is adopted for fluorescence application fields.We have thousands of stocked filters for customers to select. Free sample is available upon request. Fast delivery, high quality and expertise technical service is your best choice