Share Email Print
cover

Proceedings Paper

Blue channel of the Keck low-resolution imaging spectrometer
Author(s): James K. McCarthy; Judith G. Cohen; Brad Butcher; John Cromer; Ernest Croner; William R. Douglas; Richard M. Goeden; Tony Grewal; Barry Lu; Harold L. Petrie; Tianxiang Weng; Bob Weber; Donald G. Koch; J. Michael Rodgers
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

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.

Paper Details

Date Published: 9 July 1998
PDF: 12 pages
Proc. SPIE 3355, Optical Astronomical Instrumentation, (9 July 1998); doi: 10.1117/12.316831
Show Author Affiliations
James K. McCarthy, California Institute of Technology and Palomar Observatory (United States)
Judith G. Cohen, California Institute of Technology and Palomar Observatory (United States)
Brad Butcher, California Institute of Technology (United States)
John Cromer, California Institute of Technology Palomar Observatory (United States)
Ernest Croner, California Institute of Technology Palomar Observatory (United States)
William R. Douglas, California Institute of Technology Palomar Observatory (United States)
Richard M. Goeden, California Institute of Technology (United States)
Tony Grewal, California Institute of Technology (United States)
Barry Lu, California Institute of Technology (United States)
Harold L. Petrie, California Institute of Technology Palomar Observatory (United States)
Tianxiang Weng, California Institute of Technology (United States)
Bob Weber, California Institute of Technology Palomar Observatory (United States)
Donald G. Koch, Optical Research Associates (United States)
J. Michael Rodgers, Optical Research Associates (United States)


Published in SPIE Proceedings Vol. 3355:
Optical Astronomical Instrumentation
Sandro D'Odorico, Editor(s)

© SPIE. Terms of Use
Back to Top