Simultaneous two-wavelength Doppler phase-shifting digital holography |
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| Authors: | Barada Daisuke Kiire Tomohiro Sugisaka Jun-ichiro Kawata Shigeo Yatagai Toyohiko |
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| Affiliation: | Graduate School of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya, Tochigi 321-8585, Japan. barada@cc.utsunomiya‐u.ac.jp |
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| Abstract: | This paper presents a method based on the use of an image sensor for obtaining the complex amplitudes of beams diffracted from an object at two different wavelengths. The complex amplitude for each wavelength is extracted by the Doppler phase-shifting method. The principle underlying the proposed method is experimentally verified by using the method with two lasers having different wavelengths to measure the surface shape of a concave mirror. |
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