Phase-Shifting with Computer-Generated Holograms Written on a Spatial Light Modulator
Applied Optics, Vol. 42, Issue 35, pp. 6975-6979 (2003)
http://dx.doi.org/10.1364/AO.42.006975
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Abstract
We propose a new computer-controlled phase-shifting method based on computer-generated holograms (CGHs) displayed on a spatial light modulator (SLM). In this method the accurate phase shifts required in phase-shifting digital holography or interferometry are induced by a suitable transformation of the encoding patterns of the CGH displayed on a SLM. Both the theoretical analysis and the experimental results demonstrate the feasibility of this approach. We also discuss possible applications of this method in the field of interferometric null testing of aspheres.
© 2003 Optical Society of America
OCIS Codes
(050.1940) Diffraction and gratings : Diffraction
(050.5080) Diffraction and gratings : Phase shift
(090.1760) Holography : Computer holography
(120.5060) Instrumentation, measurement, and metrology : Phase modulation
(230.3720) Optical devices : Liquid-crystal devices
Citation
Cheng-Shan Guo, Zhen-Yu Rong, Hui-Tian Wang, Yurong Wang, and L. Z. Cai, "Phase-Shifting with Computer-Generated Holograms Written on a Spatial Light Modulator," Appl. Opt. 42, 6975-6979 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-35-6975
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