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Open Access A Phase-coded Aperture Camera with Programmable Optics

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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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Keywords: PHASE-CODED APERTURE; PSF ENGINEERING; SLM

Document Type: Research Article

Publication date: 29 January 2017

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  • For more than 30 years, the Electronic Imaging Symposium has been serving those in the broad community - from academia and industry - who work on imaging science and digital technologies. The breadth of the Symposium covers the entire imaging science ecosystem, from capture (sensors, camera) through image processing (image quality, color and appearance) to how we and our surrogate machines see and interpret images. Applications covered include augmented reality, autonomous vehicles, machine vision, data analysis, digital and mobile photography, security, virtual reality, and human vision. IS&T began sole sponsorship of the meeting in 2016. All papers presented at EIs 20+ conferences are open access.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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