Material: Float glass, K9, quartz, etc. Incident angle: 0° Wavelength indicators: T ≥ 92% @ 400 - 590nm; R < 1% @ 615 - 645nm; T ≥ 92% @ 700 - 1100nm Coating process: IAD multi - layer dielectric hard coating Surface quality: National standard level 3; U.S. military standard 40/20 Product shape: Within 80x80mm (circular, square, special - shaped, etc., all can be customized) Product thickness: 1mm, 2mm (for details of other thicknesses, please consult customer service) Application scenarios: Laser equipment, strong - light photography of industrial cameras, fluorescence microscopes, medical analysis instruments, special optical instruments Product introduction: It is mainly a filter used to eliminate the interference of the main light source. It attenuates relatively strong lasers or light sources and transmits light of other wavelengths as much as possible. It is a negative filter that is beneficial for the normal photography of cameras or protecting human eyes from damage. The 635nm notch filter produced by Risenda Optoelectronics has a small half - bandwidth, accurate wavelength positioning, firm film layers, high yield, high cost - performance ratio, and fast delivery.