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The blue channel of the Keck low-resolution imaging spectrometer

McCarthy, James K. and Cohen, Judith G. and Butcher, Brad and Cromer, John and Croner, Ernest and Douglas, Bill and Goeden, Rich and Grewal, Tony and Lu, Barry and Petrie, Hal and Weng, Tianxiang and Weber, Bob and Koch, Donald and Rodgers, J. Michael (1998) The blue channel of the Keck low-resolution imaging spectrometer. In: Optical Astronomical Instrumentation. Proceedings of SPIE. No.3355. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 81-92. ISBN 9780819428028.

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This paper summarizes the optical, mechanical, electrical, and software design of LRIS-B, the blue channel of the Keck Low Resolution and Imaging Spectrograph. The LRIS-B project will shortly be completing the existing LRIS instrument through the addition of dichroic beamsplitters, grisms to disperse light on the blue channel, broad-band u, B, and V photometric filters, a blue and near-UV transmitting camera lens, and a large format blue-sensitive CCD detector. LRIS-B will also introduce piezoelectric xy-actuation of the CCD detector inside its Dewar, in order to compensate for flexure in the existing instrument; ultimately the red-side CCD detector will be similarly equipped, its PZT xy-stage being independently programmed. The optical design of the LRIS-B camera uses only fused silica and calcium fluoride elements, and includes a decentered meniscus element to compensate for coma introduced by the LRIS off-axis paraboloid collimator. The design of the blue channel grisms have been optimized for maximum blaze efficiency, the highest dispersion grism having a groove density of 1200 gr/mm. Optical elements not in use at any given time will be stowed in carousels externally mounted to the instrument sidewalls. The entire instrument is designed to permit remote operation.

Item Type:Book Section
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Cohen, Judith G.0000-0002-8039-4673
Additional Information:© 1998 Society of Photo-Optical Instrumentation Engineers (SPIE). The LRIS—B project was funded by the California Association for Research in Astronomy, and it is a pleasure to acknowledge the Keck Foundation and the late Howard Keck for the gift which made the W.M. Keck Observatory possible. We also wish to thank the members of the LRIS—B design review panels (Bev Oke, chair, Tom Bida, Harland Epps, Jim Gunn, Gary Hill, Frank Meisheimer, and Jerry Nelson) for their insightful comments
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California Association for Research in AstronomyUNSPECIFIED
W. M. Keck FoundationUNSPECIFIED
Series Name:Proceedings of SPIE
Issue or Number:3355
Record Number:CaltechAUTHORS:20190604-144842812
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Official Citation:James K. McCarthy, Judith G. Cohen, Brad Butcher, John Cromer, Ernest Croner, William R. Douglas Jr., Richard M. Goeden, Tony Grewal, Barry Lu, Harold L. Petrie, Tianxiang Weng, Bob Weber, Donald G. Koch, and J. Michael Rodgers "Blue channel of the Keck low-resolution imaging spectrometer", Proc. SPIE 3355, Optical Astronomical Instrumentation, (9 July 1998); doi: 10.1117/12.316831;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96118
Deposited By: George Porter
Deposited On:04 Jun 2019 22:20
Last Modified:16 Nov 2021 17:18

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