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Interferometry using binary holograms without high order diffraction effects |
Optics Letters, Vol. 36, Issue 12, pp. 2357-2359 (2011)
http://dx.doi.org/10.1364/OL.36.002357
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Abstract
We describe a technique for a phase-stepping interferometer based on programmable binary phase holograms, particularly useful for optical testing of aspheric or free-form surfaces. It is well-known that binary holograms can be used to generate reference surfaces for interferometry, but a major problem is that cross talk from higher diffraction orders and aliasing can reduce the fidelity of the system. Here, we propose a new encoding technique which improves the accuracy of the technique and demonstrate its implementation using a binary liquid crystal spatial light modulator.
© 2011 Optical Society of America
OCIS Codes
(050.1970) Diffraction and gratings : Diffractive optics
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(070.6120) Fourier optics and signal processing : Spatial light modulators
ToC Category:
Instrumentation, Measurement, and Metrology
History
Original Manuscript: April 21, 2011
Revised Manuscript: May 23, 2011
Manuscript Accepted: May 24, 2011
Published: June 15, 2011
Citation
Bosanta R. Boruah, Gordon D. Love, and Mark A. A. Neil, "Interferometry using binary holograms without high order diffraction effects," Opt. Lett. 36, 2357-2359 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-12-2357
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