Exact computation of image disruption under reflection on a smooth surface and Ronchigrams
Applied Optics, Vol. 47, Issue 29, pp. 5500-5518 (2008)
http://dx.doi.org/10.1364/AO.47.005500
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Abstract
We use geometrical optics and the caustic-touching theorem to study, in an exact way, the change in the topology of the image of an object obtained by reflections on an arbitrary smooth surface. Since the procedure that we use to compute the image is exactly the same as that used to simulate the ideal patterns, referred to as Ronchigrams, in the Ronchi test used to test mirrors, we remark that the closed loop fringes commonly observed in the Ronchigrams when the grating, referred to as a Ronchi ruling, is located at the caustic place are due to a disruption of fringes, or, more correctly, as disruption of shadows corresponding to the ruling bands. To illustrate our results, we assume that the reflecting surface is a spherical mirror and we consider two kinds of objects: circles and line segments.
© 2008 Optical Society of America
OCIS Codes
(080.0080) Geometric optics : Geometric optics
(110.4190) Imaging systems : Multiple imaging
(120.5700) Instrumentation, measurement, and metrology : Reflection
(220.4840) Optical design and fabrication : Testing
ToC Category:
Image Processing
History
Original Manuscript: July 1, 2008
Revised Manuscript: September 4, 2008
Manuscript Accepted: September 4, 2008
Published: October 8, 2008
Citation
Edwin Román-Hernández and Gilberto Silva-Ortigoza, "Exact computation of image disruption under reflection on a smooth surface and Ronchigrams," Appl. Opt. 47, 5500-5518 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-29-5500
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