Optical system design of the AST3-NIR camera

Jessica R. Zheng*, Vladimir Churilov, Robert Content, Jon Lawrence, Bozhong Gu, Haiping Lu, Haikun Wen, Xiangyan Yuan

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

Abstract

In this paper, we present the preliminary optical system design of AST3-NIR camera, a wide-field infrared imager for 50cm Antarctic surveying telescope (AST3-3) to be deployed to Dome A, the Antarctic plateau. It is a joint project in which China is responsible for telescope hardware and control, logistics and deployment. Australia is responsible for instrument hardware design and control, and power generation. The camera uses two mosaic Leonardo detectors with 1280 x 1032 pixels each. The instrument is designed with a field of view(FOV) of 28.10 X 46.10 at the pixel scale of 1.35" per 15μm pixel. It is optimized for K dark band (2.26μm to 2.49 μm). The main challenges of this design are to produce a well-defined internal pupil stop located within cryogenic condition which reduces the thermal background and the correction of off-axis aberrations due to the large available field. Since the operating temperature of the camera could vary from -35°C to -90°C, the refocusing mechanism needs to be designed within the camera. The optical performance of the system will be demonstrated. We show the opto-mechanical error budget and compensation strategy that allows the built design to meet the optical performance.

Original languageEnglish
Title of host publicationGround-based and Airborne Instrumentation for Astronomy VII
EditorsChristopher J. Evans, Luc Simard, Hideki Takami
Place of PublicationBellingham, Washington
PublisherSPIE
Pages1-12
Number of pages12
ISBN (Electronic)9781510619586
ISBN (Print)9781510619579
DOIs
Publication statusPublished - 6 Jul 2018
EventGround-based and Airborne Instrumentation for Astronomy VII 2018 - Austin, United States
Duration: 10 Jun 201814 Jun 2018

Publication series

NameProceedings of SPIE
Volume10702
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceGround-based and Airborne Instrumentation for Astronomy VII 2018
CountryUnited States
CityAustin
Period10/06/1814/06/18

Keywords

  • Antarctic
  • Camera design
  • Infrared optics

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