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Optical glass refers to a quality of glass suitable for the manufacture of optical systems such as optical lenses, prisms or mirrors.Unlike window glass or crystal, whose formula is adapted to the desired aesthetic effect, optical glass contains additives designed to modify certain optical or mechanical properties of the glass: refractive index, dispersion, transmittance, thermal expansion and ...
Thoriated glass is a glass material used in the manufacture of optical systems, specifically photographic lenses. It is useful to this process due to its high refractive index . Thoriated glass is radioactive due to the inclusion of thorium dioxide , oxide of radioactive element thorium .
The new Jena optical glass also opened up the possibility of increased performance of photographic lenses. The first use of Jena glass in a photographic lens was by Voigtländer, but as the lens was an old design its performance was not greatly improved.
Industrial drawing towers range in height from 30 to 45 meters. A drawing tower is used in the production of optical fiber , for example for fiber-optic communication cables . The preform is a multi-layered cylinder typically 20 cm in diameter, and 2 m long.
A catadioptric optical system is one where refraction and reflection are combined in an optical system, usually via lenses and curved mirrors . Catadioptric combinations are used in focusing systems such as searchlights , headlamps , early lighthouse focusing systems, optical telescopes , microscopes , and telephoto lenses .
Optical lens design is the process of designing a lens to meet a set of performance requirements and constraints, including cost and manufacturing limitations. Parameters include surface profile types (spherical, aspheric, holographic, diffractive, etc.), as well as radius of curvature, distance to the next surface, material type and optionally tilt and decenter.
Ries with raw block of optical crystal at Schott Optical. Ries's sculptures are noted for their changing internal optical compositions and technical proficiency. Ries's primary medium is clear lead crystal, a glass with an unusually high refractive index, extreme light transmission in the visual range, and outstanding homogeneity.
Phosphate glass is a class of optical glasses composed of metaphosphates of various metals. Instead of SiO 2 in silicate glasses, the glass forming substrate is P 2 O 5.