20 October 1993 Design of a new 1-5.5-μm infrared camera for the NASA Infrared Telescope Facility
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Abstract
The design of a multipurpose 1 - 5.5 micrometers infrared camera (NSFCAM) for the NASA Infrared Telescope Facility (IRTF) on Mauna Kea, Hawaii, is described. The camera is built around the new 256 X 256 InSb array manufactured by Santa Barbara Research Center (SBRC) and incorporates a variety of observing modes to fulfill its role as a major facility instrument. These include three remotely-selectable image scales, a selection of fixed bandpass filters, R equals 50 - 100 spectral resolution circularly variable filters, a grism, coronographic masks, and a polarization imaging capability. Through the use of flexible array clocking schemes, driven by programmable digital signal processors (DSPs), we plan to implement several new operating modes, including real-time shift and add for image stabilization, and fast subarray readouts for occultations. Simultaneous optical and infrared imaging of the same field will be possible through the use of a cold dichroic beamsplitter. This feature is primarily intended for use with the IRTF tip-tilt image stabilization system currently being built. Given a suitable guide star, the camera should achieve near-diffraction limited imaging at 2 - 5 micrometers . In this paper we discuss the design of the optics, cryogenic, electronics and software needed to provide the camera with these capabilities.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
John T. Rayner, John T. Rayner, Mark A. Shure, Mark A. Shure, Douglas W. Toomey, Douglas W. Toomey, Peter M. Onaka, Peter M. Onaka, Anthony J. Denault, Anthony J. Denault, Werner E. Stahlberger, Werner E. Stahlberger, Darryl Y. Watanabe, Darryl Y. Watanabe, K. Criez, K. Criez, Louis Robertson, Louis Robertson, Daniel Cook, Daniel Cook, Michael J. Kidger, Michael J. Kidger, } "Design of a new 1-5.5-μm infrared camera for the NASA Infrared Telescope Facility", Proc. SPIE 1946, Infrared Detectors and Instrumentation, (20 October 1993); doi: 10.1117/12.158701; https://doi.org/10.1117/12.158701
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