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  • Absolute Fizeau Test Optics
Jan 2007
Melles Griot, Optical Systems GroupRequest Info
ROCHESTER, N.Y., Jan. 3, 2007 -- The Melles Griot Optics Group, a provider of optical components, multielement lenses and contract-manufactured assemblies, has released additional Fizeau interferometer test optics to complement its Absolute Fizeau λ/40 transmission sphere product line.

AbsoluteFizeau.jpgThe company said the addition of Absolute Fizeau λ/50 concave and convex reference spheres allows users to record and store reference wavefronts for subtraction from interferometric test data, substantially improving their interferometer system's absolute accuracy.

Also added to the product lineup are Absolute Fizeau λ/50 transmission and reference flats that cost-effectively increase the absolute accuracy of Zygo-style Fizeau surface and wavefront-testing interferometers to λ/50 without the need to store, manipulate or subtract reference wavefronts during the testing process.

According to Bruce Capron, director of sales and marketing, “The new Absolute family of test optics will enable the interferometer user to quadruple the accuracy of their existing Fizeau interferometer. This should be of great interest to every optics house that wants to upgrade their test capabilities and increase the quality of the lenses that they produce.”

For more information, visit:

Melles Griot Optics Group
55 Science Parkway
Rochester, NY 14620
Phone: (800) 775-7558
Fax: (585) 244-6292


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Describing a hollow curved surface; curved inward.
Denoting a spherically shaped surface; curved outward.
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...
The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
In considering a field of electromagnetic energy emanating from a source, the wavefront is a surface connecting all field points that are equidistant from the source.
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