an efficient and novel computation method for simulating diffraction patterns from large-scale coded apertures on large-scale focal plane arrays

Abraham Shrekenhamer; Stephen R. Gottesman

doi:10.1117/12.929922

15 October 2012 An efficient and novel computation method for simulating diffraction patterns from large-scale coded apertures on large-scale focal plane arrays

Abraham Shrekenhamer, Stephen R. Gottesman

Author Affiliations +

Proceedings Volume 8520, Unconventional Imaging and Wavefront Sensing 2012; 852007 (2012) https://doi.org/10.1117/12.929922
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

Abstract

A novel and memory efficient method for computing diffraction patterns produced on large-scale focal planes by largescale Coded Apertures at wavelengths where diffraction effects are significant has been developed and tested. The scheme, readily implementable on portable computers, overcomes the memory limitations of present state-of-the-art simulation codes such as Zemax. The method consists of first calculating a set of reference complex field (amplitude and phase) patterns on the focal plane produced by a single (reference) central hole, extending to twice the focal plane array size, with one such pattern for each Line-of-Sight (LOS) direction and wavelength in the scene, and with the pattern amplitude corresponding to the square-root of the spectral irradiance from each such LOS direction in the scene at selected wavelengths. Next the set of reference patterns is transformed to generate pattern sets for other holes. The transformation consists of a translational pattern shift corresponding to each hole’s position offset and an electrical phase shift corresponding to each hole’s position offset and incoming radiance’s direction and wavelength. The set of complex patterns for each direction and wavelength is then summed coherently and squared for each detector to yield a set of power patterns unique for each direction and wavelength. Finally the set of power patterns is summed to produce the full waveband diffraction pattern from the scene. With this tool researchers can now efficiently simulate diffraction patterns produced from scenes by large-scale Coded Apertures onto large-scale focal plane arrays to support the development and optimization of coded aperture masks and image reconstruction algorithms.

Citation Download Citation

Abraham Shrekenhamer and Stephen R. Gottesman "An efficient and novel computation method for simulating diffraction patterns from large-scale coded apertures on large-scale focal plane arrays", Proc. SPIE 8520, Unconventional Imaging and Wavefront Sensing 2012, 852007 (15 October 2012); https://doi.org/10.1117/12.929922

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
21 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Sensors

Staring arrays

Phase shifts

Diffraction

Coded apertures

Computer simulations

Computing systems

Show All Keywords

Keywords/Phrases

Search In:

Publication Years