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Relaxation of the Talbot condition in generalized grating imaging |
Applied Optics, Vol. 51, Issue 16, pp. 3137-3144 (2012)
http://dx.doi.org/10.1364/AO.51.003137
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Abstract
We can form a grating image with two gratings having different pitches with an extended light source. It is called generalized grating imaging or the Talbot–Lau effect. When we want to obtain high contrast image with pure absorption gratings or pure phase gratings, the separation between the two gratings is restricted. This corresponds to the Talbot condition. In this paper, we propose to use a combination of absorption grating and phase grating to relax the separation restriction. The theory of generalized grating imaging is applied to the system with this kind of grating. Simulations are performed for calculating contrast variation and show that the proposed system practically relaxes the Talbot condition. An experiment verifies the result of the simulation.
© 2012 Optical Society of America
OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(070.6760) Fourier optics and signal processing : Talbot and self-imaging effects
ToC Category:
Diffraction and Gratings
History
Original Manuscript: January 13, 2012
Manuscript Accepted: February 21, 2012
Published: May 21, 2012
Citation
Koichi Iwata, Kazuo Satoh, and Kousuke Moriwaki, "Relaxation of the Talbot condition in generalized grating imaging," Appl. Opt. 51, 3137-3144 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-16-3137
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