NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Resolution-enhanced Mapping SpectrometerA familiar mapping spectrometer implementation utilizes two dimensional detector arrays with spectral dispersion along one direction and spatial along the other. Spectral images are formed by spatially scanning across the scene (i.e., push-broom scanning). For imaging grating and prism spectrometers, the slit is perpendicular to the spatial scan direction. For spectrometers utilizing linearly variable focal-plane-mounted filters the spatial scan direction is perpendicular to the direction of spectral variation. These spectrometers share the common limitation that the number of spectral resolution elements is given by the number of pixels along the spectral (or dispersive) direction. Resolution enhancement by first passing the light input to the spectrometer through a scanned etalon or Michelson is discussed. Thus, while a detector element is scanned through a spatial resolution element of the scene, it is also temporally sampled. The analysis for all the pixels in the dispersive direction is addressed. Several specific examples are discussed. The alternate use of a Michelson for the same enhancement purpose is also discussed. Suitable for weight constrained deep space missions, hardware systems were developed including actuators, sensor, and electronics such that low-resolution etalons with performance required for implementation would weigh less than one pound.
Document ID
19930019605
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kumer, J. B.
(Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Aubrun, J. N.
(Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Rosenberg, W. J.
(Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Roche, A. E.
(Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Lunar and Planetary Inst., Workshop on Advanced Technologies for Planetary Instruments, Part 1
Subject Category
Instrumentation And Photography
Accession Number
93N28794
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
No Preview Available