Share Email Print
cover

Optical Engineering

Twyman-Green interferometer for testing microspheres
Format Member Price Non-Member Price
PDF $20.00 $25.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Testing of spherical surfaces using the Twyman-Green interferometer with a laser source suffers from the presence of spurious interference fringes and dust diffraction. By reducing the spatial coherence while maintaining the temporal coherence a tremendous improvement of the fringe quality can be obtained. To conserve sufficient contrast, the reference mirror must be positioned to suitable locations relative to the test arm of the interferometer. These conditions are described and examples are presented.

Paper Details

Date Published: 1 October 1995
PDF: 4 pages
Opt. Eng. 34(10) doi: 10.1117/12.210737
Published in: Optical Engineering Volume 34, Issue 10
Show Author Affiliations
Johannes Schwider, Univ. Erlangen-Nuernberg (Germany)
Oliver R. Falkenstoerfer, Univ. Erlangen-Nuernberg (Germany)


© SPIE. Terms of Use
Back to Top