Twyman Green interferometer with CGH for testing of cylindrical surfaces

D. K. Sharma; Johannes Schwider

doi:10.1117/12.346815

29 April 1999 Twyman Green interferometer with CGH for testing of cylindrical surfaces

D. K. Sharma, Johannes Schwider

Proceedings Volume 3729, Selected Papers from International Conference on Optics and Optoelectronics '98; (1999) https://doi.org/10.1117/12.346815
Event: Selected Papers from the International Conference on Optics and Optoelectronics, 1998, Dehradun, India

Abstract

Modifications of the basic Twyman Green Interferometer for the testing of the a cylindrical surface are described in this paper. A CGH cylindrical lens of f equals 45.0 mm is put in the test arm of the interferometer to serve as a null lens. Polarizing components are used to provide for adjustments of the intensities of the two beams. The resulting interferograms have a strong bright patch in the middle which does not allow the unwrapping of the phase. A modification of the CGH cylindrical element makes this patch to disappear making possible the application of phase shifting technique for measurement of these surfaces.

Citation Download Citation

D. K. Sharma and Johannes Schwider "Twyman Green interferometer with CGH for testing of cylindrical surfaces", Proc. SPIE 3729, Selected Papers from International Conference on Optics and Optoelectronics '98, (29 April 1999); https://doi.org/10.1117/12.346815

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available