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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 29 — Oct. 10, 2011
  • pp: 5662–5673

Geometrically superresolved lensless imaging using a spatial light modulator

Ohad Fixler and Zeev Zalevsky  »View Author Affiliations

Applied Optics, Vol. 50, Issue 29, pp. 5662-5673 (2011)

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In this paper we introduce an imaging system based on a reflective phase-only spatial light modulator (SLM) in order to perform imaging with improved geometric resolution. By using the SLM, we combine the realization of two main abilities: a lens with a tunable focus and a phase function that, after proper free-space propagation, is projected as an amplitude distribution on top of the inspected object. The first ability is related to the realization of a lens function combined with a tunable prism that yields a microscanning of the inspected object. This by itself improves the spatial sampling density. The second ability is related to a projection of a phase function that is computed using an iterative beam-shaping Gerchberg–Saxton algorithm. After the free-space propagation from the SLM toward the inspected object, an amplitude pattern is generated on top of the object. This projected pattern and a set of low- resolution images with relative shift are interlaced and, after applying the proper regularization method, a geometrically superresolved image is reconstructed.

© 2011 Optical Society of America

OCIS Codes
(230.6120) Optical devices : Spatial light modulators
(110.1080) Imaging systems : Active or adaptive optics

ToC Category:
Optical Devices

Original Manuscript: April 21, 2011
Revised Manuscript: August 23, 2011
Manuscript Accepted: August 23, 2011
Published: October 5, 2011

Ohad Fixler and Zeev Zalevsky, "Geometrically superresolved lensless imaging using a spatial light modulator," Appl. Opt. 50, 5662-5673 (2011)

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