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Record 38 of 4165
An Integrated Imaging Detector of Polarization and Spectral Content
Author and Affiliation:
Rust, D. M.(Johns Hopkins Univ., Applied Physics Lab., Laurel, MD United States)
Thompson, K. E.(Johns Hopkins Univ., Applied Physics Lab., Laurel, MD United States)
Abstract: A new type of image detector has been designed to simultaneously analyze the polarization of light at all picture elements in a scene. The Integrated Dual Imaging Detector (IDID) consists of a polarizing beamsplitter bonded to a charge-coupled device (CCD), with signal-analysis circuitry and analog-to-digital converters, all integrated on a silicon chip. It should be capable of 1:10(exp 4) polarization discrimination. The IDID should simplify the design and operation of imaging polarimeters and spectroscopic imagers used, for example, in atmospheric and solar research. Innovations in the IDID include (1) two interleaved 512 x 1024-pixel imaging arrays (one for each polarization plane); (2) large dynamic range (well depth of 10(exp 6) electrons per pixel); (3) simultaneous readout of both images at 10 million pixels per second each; (4) on-chip analog signal processing to produce polarization maps in real time; (5) on-chip 10-bit A/D conversion. When used with a lithium-niobate Fabry-Perot etalon or other color filter that can encode spectral information as polarization, the IDID can collect and analyze simultaneous images at two wavelengths. Precise photometric analysis of molecular or atomic concentrations in the atmosphere is one suggested application. When used in a solar telescope, the IDID will charge the polarization, which can then be converted to maps of the vector magnetic fields on the solar surface.
Publication Date: Jan 01, 1993
Document ID:
19990047880
(Acquired Jul 09, 1999)
Subject Category: OPTICS
Document Type: Reprint
Publication Information: Remote Sensing Reviews; Volume 8; 215-225
Publisher Information: Gordon and Breach, United Kingdom
Contract/Grant/Task Num: NAGw-2866
Financial Sponsor: NASA; Washington, DC United States
Organization Source: Johns Hopkins Univ.; Applied Physics Lab.; Laurel, MD United States
Description: In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: IMAGING TECHNIQUES; ANALOG TO DIGITAL CONVERTERS; CHARGE COUPLED DEVICES; POLARIZED LIGHT; SIGNAL ANALYSIS; REAL TIME OPERATION; DYNAMIC RANGE; LITHIUM NIOBATES; POLARIMETERS; SIGNAL PROCESSING
Availability Source: Other Sources
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