Nonscanning no-moving-parts imaging spectrometer

Michael R. Descour; Eustace L. Dereniak

doi:10.1117/12.210908

12 June 1995 Nonscanning no-moving-parts imaging spectrometer

Proceedings Volume 2480, Imaging Spectrometry; (1995) https://doi.org/10.1117/12.210908
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

Abstract

A temporally and spatially nonscanning imaging spectrometer is described in terms of computed-tomography concepts, specifically the central-slice theorem. The critical system element is a sequence of three transmission sinusoidal-phase gratings rotated in 60 degree increments which achieve dispersion in multiple directions and into multiple orders. The dispersed images of the system's field-stop are interpreted as 2D projections of a 3D (x, y, (lambda) ) object cube. Due to finite focal-plane array size, this computed-tomography imaging spectrometer (CTIS) is an example of a limited-view-angle tomographic system. The imaging spectrometer's point-spread-function is measured experimentally as a function of wavelength and position in the field-of-view. Reconstruction of the object cube is then achieved via the maximum-likelihood expectation-maximization algorithm under the assumption of a Poisson likelihood law. Experimental results using a spatial/spectral 'University of Arizona' target indicate that the instrument performs well in the case of broadband and narrowband emitters. A relationship between an object's spatial size and spectral resolution characteristic of limited-view-angle systems is demonstrated.

Citation Download Citation

Michael R. Descour and Eustace L. Dereniak "Nonscanning no-moving-parts imaging spectrometer", Proc. SPIE 2480, Imaging Spectrometry, (12 June 1995); https://doi.org/10.1117/12.210908

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