Subei Optics specializes in Optical Colored Filter Glass,Coating Filter Glass,and Transparent Glass Windiow.
Optical glass refers to glass that can alter the direction of light propagation and modify the relative spectral distribution of ultraviolet, visible, or infrared light. In a narrow sense, optical glass denotes colorless optical glass; it is used to manufacture lenses, prisms, mirrors, and windows for optical instruments. The distinction between optical glass and other types of glass lies in its role as a component within optical systems, where it must meet specific requirements for optical imaging. Consequently, the quality assessment of optical glass involves certain specialized and stringent criteria.
I. Specific Optical Constants and Consistency of Optical Constants Within the Same Batch
Each type of optical glass possesses defined standard refractive index values for light at different wavelengths, serving as the foundation for optical designers when planning optical systems. Therefore, the optical constants of factory-produced optical glass must fall within specified tolerance ranges for these values. Otherwise, the actual imaging quality will deviate from the design expectations, compromising the performance of optical instruments.
II. High Transparency
The brightness of an optical system's image is directly proportional to the transparency of the glass. The transparency of optical glass to light of a specific wavelength is expressed by the optical absorption coefficient Kλ. As light passes through a series of prisms and lenses, part of its energy is lost due to reflection at the interfaces of optical components, while another part is absorbed by the medium (glass) itself. Therefore, for optical systems containing multiple thin lenses, the primary method to enhance transmittance lies in reducing reflection losses at the lens surfaces, such as by applying anti-reflective coating layers.