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Volume: 29 | Article ID: art00012
A Phase-coded Aperture Camera with Programmable Optics
  DOI :  10.2352/ISSN.2470-1173.2017.17.COIMG-426  Published OnlineJanuary 2017

We propose a novel computational imaging system that enables the generation of Point Spread Functions (PSFs) of userspecified geometry. Key ingredient of our system is a phase-coded aperture which manipulates the phase distribution of the pupil function by inserting a phase modulator. We use a reflective phaseonly liquid crystal-based Spatial Light Modulator (SLM) for phase modulation. Via encoding a grayscale image on the SLM, the refractive index of each cell can be altered. Phase patterns of PSFs with different shapes are optimized by the Gerchberg-Saxton algorithm. A number of non-trivial, complex shaped PSFs has been captured. We further demonstrate how such a system can realize refocusing through encoding a Fresnel lens phase pattern to shift the focal plane.

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Jieen Chen, Michael Hirsch, Rainer Heintzmann, Bernhard Eberhardt, Hendrik P. A. Lensch, "A Phase-coded Aperture Camera with Programmable Opticsin Proc. IS&T Int’l. Symp. on Electronic Imaging: Computational Imaging XV,  2017,  pp 70 - 75,

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Electronic Imaging
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