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GLASS ASPHERES

Photonics Spectra
Jun 2006
Precision Asphere Inc.Request Info
 
Using proprietary surface-forming technology, Precision Asphere LLC manufactures custom convex and concave glass aspheres with diameters from 10 to >300 mm. Aspheric surface forming is done on computer-controlled machines using optimized motion-control software and tooling for precise and quick convergence of figure error, and glass aspheres that deviate from best-fit spheres by any amount can be produced. The machines use feedback from a 200-mm Talysurf PGI-1240 stylus profiler and a Zygo GPI XP interferometer for consistent control of the motion and forces required to form complex aspheric surfaces.


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GLOSSARY
interferometer
An instrument that employs the interference of lightwaves to measure the accuracy of optical surfaces; it can measure a length in terms of the length of a wave of light by using interference phenomena based on the wave characteristics of light. Interferometers are used extensively for testing optical elements during manufacture. Typical designs include the Michelson, Twyman-Green and Fizeau interferometers. The basic interferometer components are a light source, a beamsplitter, a reference...
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