Dual-channel near-infrared/visible imaging systems

Paul Laurence Byard

doi:10.1117/12.317334

21 August 1998 Dual-channel near-infrared/visible imaging systems

Paul Laurence Byard

Proceedings Volume 3354, Infrared Astronomical Instrumentation; (1998) https://doi.org/10.1117/12.317334
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

Abstract

Two imaging systems for 1 meter telescope with f/ratios of f/10 and f/16 capable of simultaneous operation in any one of the U, B, V or R passbands together with any one of the J, H or K passbands are described. The visible bands are separated from the IR bands by a dichroic beam-splitter. Identical fields are imaged on a 2048 by 2048 CCD with 15 micron pixels, and an InSb 1024 by 1024 array with 27 micron pixels at a scale of 0.3 arc-seconds per pixel. The system uses reflective optics prior to the dichroic followed by refractive optics to produce the final f/ratios. The astigmatism introduce into the IR transmitted beam by the dichroic substrate is corrected using a cylindrical mirror. An additional prismatic correction necessitated by the dispersion in the beam splitter is also addressed.

Citation Download Citation

Paul Laurence Byard "Dual-channel near-infrared/visible imaging systems", Proc. SPIE 3354, Infrared Astronomical Instrumentation, (21 August 1998); https://doi.org/10.1117/12.317334

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