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A versatile wavelength-dependent spectrophotometer for efficiency measurements of CCD and cryogenic gratings

Guzman, D. and Blais-Ouellette, S. and Bonati, M. and Elgamil, A. (2004) A versatile wavelength-dependent spectrophotometer for efficiency measurements of CCD and cryogenic gratings. In: Optical and Infrared Detectors for Astronomy. Proceedings of SPIE. No.5499. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 371-378. ISBN 9780819454317. http://resolver.caltech.edu/CaltechAUTHORS:20180809-133557155

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Abstract

A user-friendly and automatic illuminator with adjustable wavelength and optical power has been developed to obtain precision quantum efficiency (QE) curves of astronomical CCD as well as optical transmission measurements for cryogenic holographic gratings and other optical components. Integrating commercial components with custom mechanical parts and control software, this equipment is able to illuminate a target with light of controlled intensity and wavelength. This facility is primarily intended for testing of Volume Phase Holographic (VPH) gratings at low temperature as well as obtaining CCD quantum efficiencies. A Labview control application runs on a desktop computer allowing full automation of the spectrophotometer. The apparatus includes a Quartz-Tungsten light source, neutral density filters, a monochromator, visible and near-infrared power meters, as well as collimating and focusing optics. Rotation mechanisms allow the characterization of gratings for all angles of diffractions. For CCD testing, network commands allow the facility to get raw images, compute and record QE curves for further detector characterization.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.551973DOIArticle
Additional Information:© 2004 Society of Photo-Optical Instrumentation Engineers (SPIE).
Subject Keywords:Spectrophotometer, QE Measurement, VPH testing
Record Number:CaltechAUTHORS:20180809-133557155
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180809-133557155
Official Citation:Dani Guzman, Sebastien Blais-Ouellette, Marco Bonati, Amal Elgamil, "A versatile wavelength-dependent spectrophotometer for efficiency measurements of CCD and cryogenic gratings", Proc. SPIE 5499, Optical and Infrared Detectors for Astronomy, (29 September 2004); doi: 10.1117/12.551973; https://doi.org/10.1117/12.551973
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:88700
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:09 Aug 2018 21:53
Last Modified:09 Aug 2018 21:53

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