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Multicolor digital holography with an achromatic phase shifter

2002; Optica Publishing Group; Volume: 27; Issue: 16 Linguagem: Inglês

10.1364/ol.27.001403

1539-4794

Junichi Kato, Ichirou Yamaguchi, Tatsuki Matsumura,

Advanced Vision and Imaging

Multiwavelength recording and reconstruction of a three-dimensional object are realized by use of phase-shifting digital holography. Red, green, and blue lines emitted from a white-light He-Cd laser are used for one-step recording of the complex amplitude of the object with a color CCD camera, in which a phase shift is introduced with an achromatic phase shifter based on the geometric phase. Three color images are reconstructed and successfully combined in a computer by use of Fresnel transformation based on a convolution.