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- Title
Novel and simple lateral shear interferometer with holographic lens and spatial Fourier transform.
- Authors
Joenathan, Charles; Pedrini, Giancarlo; Alekseenko, Igor; Osten, Wolfgang
- Abstract
Testing with a single holographic lens or grating in a collimated beam is normally not possible because of the inherent tilt caused in the wavefront. The tilt between the two beams in shearing creates a large number of linear fringes which overshadow the information about the wavefront. However, here, we show that we can use this tilt to make quantitative measurements which was otherwise not possible. In the novel method, we obtain shear in a relatively simple way, and at the same time we extract phase information using spatial Fourier transform technique. This technique is suitable for making quantitative measurement of wavefront and disturbances in turbulent conditions. Here, we demonstrated the real-time phase measurement capacity of the interferometer, a result of one such application is shown.
- Subjects
INTERFEROMETRY; SHEARING interferometers; OPTICAL engineering; LASER beams; HOLOGRAPHY
- Publication
Optical Engineering, 2012, Vol 51, Issue 7, p1
- ISSN
0091-3286
- Publication type
Article
- DOI
10.1117/1.OE.51.7.075601