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Measurement System

Photonics Spectra
Oct 2014
4D Technology CorporationRequest Info
 
TUCSON, Ariz., July 30, 2014 — Enabling the measurement of 300-mm-diameter optics, a system from 4D Technology has been designed around a standard, 100-mm aperture AccuFiz interferometer for large afocal optics and large-diameter curved surfaces.

The suite of 300-mm components includes a compact 100- to 300-mm beam expander that can be used in a horizontal or look-down measurement configuration. Kinematic mounting and a visible coarse alignment laser quickly positions the reference and test optics for rapid test setup. Mounts provide highly repeatable tip, tilt and rotation control, while precise adjustments enable three-flat testing for high-accuracy measurement.

Although optimized for the AccuFiz, the system can be adapted for any 100-mm-aperture interferometer.


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GLOSSARY
aperture
An opening or hole through which radiation or matter may pass.
beam
1. A bundle of light rays that may be parallel, converging or diverging. 2. A concentrated, unidirectional stream of particles. 3. A concentrated, unidirectional flow of electromagnetic waves.
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...
mount
See gimbal mount; kinematic mount; lens mount.
surface
1. In optics, one of the exterior faces of an optical element. 2. The process of grinding or generating the face of an optical element.
system
A combination of components arranged so as to perform at least one function.
afocal
An optical system with object and image points at infinity. Literally, "without a focal length."
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