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Proceedings Paper

Image Processing Operations Achievable With The Microchannel Spatial Light Modulator
Author(s): C. Warde; A. D. Fisher; J. I. Thackara; A. M. Weiss
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Paper Abstract

The Microchannel Spatial Light Modulator (MSLM) is a versatile, optically-addressed, highly -sensitive device that is well suited for low-light-level, real-time, optical information processing. It consists of a photocathode, a microchannel plate (MCP), a planar acceleration grid, and an electro-optic plate in proximity focus. A framing rate of 20 Hz with full modulation depth, and 100 Hz with 20% modulation depth has been achieved in a vacuum-demountable LiTaO3 device. A halfwave exposure sensitivity of 2.2 nJ/cm2 and an optical information storage time of more than 2 months have been achieved in a similar gridless LiTaO3 device employing a visible photocathode. Image processing operations such as analog and digital thresholding, real-time image hard clipping, contrast reversal, contrast enhancement, image addition and subtraction, and binary level logic operations such as AND, OR, XOR, and NOR can be achieved with this device. This collection of achievable image processing characteristics makes the MSLM potentially useful for a number of smart sensor applications.

Paper Details

Date Published: 1 January 1980
PDF: 9 pages
Proc. SPIE 0252, Smart Sensors II, (1 January 1980); doi: 10.1117/12.959480
Show Author Affiliations
C. Warde, Massachusetts Institute of Technology (United States)
A. D. Fisher, Massachusetts Institute of Technology (United States)
J. I. Thackara, Massachusetts Institute of Technology (United States)
A. M. Weiss, Massachusetts Institute of Technology (United States)


Published in SPIE Proceedings Vol. 0252:
Smart Sensors II
David F. Barbe, Editor(s)

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