@inproceedings{5c39ba0669254bf7b821c3f0bdcb50de,
title = "Performance of the near-infrared camera for the Subaru Prime Focus Spectrograph",
abstract = "This paper presents thermal system and imaging performance test results from the first of four near infrared cameras for the SuMIRe (Subaru Measurement of Images and Redshifts) Prime Focus Spectrograph (PFS) being developed for the Subaru Telescope. The PFS near infrared camera is a large (330 mm entrance aperture to accommodate a 275 mm collimated beam diameter) cryogenically cooled vacuum Schmidt camera with a 300 mm focal length that images dispersed light onto a 4k x 4k, 15 µm pixel, HgCdTe substrate-removed Teledyne 1.7 µm detector. The 230 kg camera contains just four optical elements: a two-element refractive corrector, a Mangin mirror, and a field flattening lens. This simple optical design produces good imaging performance considering the wide field and wavelength range, and it does so in large part due to the use of a Mangin mirror for the Schmidt primary. Thermal background, both in-band and out-of-band, is reduced to a scientifically acceptable level using cryogenically cooled optics, very black geometrically optimized baffling, and a pair of thermal rejection coatings that reject photons between the edge of the science bandpass and the detector cutoff. System operating temperature is achieved by a pair of closed-cycle cryocoolers, one dedicated to cooling the optics, and one dedicated to cooling the detector. Here we discuss the lab performance of the near infrared camera, both from the perspective of the thermal system and the optical system, including in-band and out-of-band performance.",
keywords = "Cryogenic, HgCdTe, Multi-object spectrograph, Near infrared camera, Spectrograph, SuMIRe, Subaru Telescope",
author = "Smee, {Stephen A.} and Gunn, {James E.} and Barkhouser, {Robert H.} and Josh Peebles and Loomis, {Craig P.} and Eddie Bergeron and Kjetil Dohlen and Erin Kado-Fong and Givans, {Jahmour J.} and Mirek Golebiowski and Aidan Gray and Hammond, {Randy P.} and Hope, {Stephen C.} and Robert Lupton and Yuki Moritani and Naoyuki Tamura",
note = "Publisher Copyright: {\textcopyright} 2022 SPIE.; Ground-based and Airborne Instrumentation for Astronomy IX 2022 ; Conference date: 17-07-2022 Through 22-07-2022",
year = "2022",
doi = "10.1117/12.2630536",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Evans, {Christopher J.} and Bryant, {Julia J.} and Kentaro Motohara",
booktitle = "Ground-based and Airborne Instrumentation for Astronomy IX",
address = "United States",
}