Infrared And Visible Detector Electronics For The Infrared Astronomical Satellite (IRAS)

D. L. Langford; J. J. Simmonds; T. Ozawa; E. C. Long; R. Paris

doi:10.1117/12.966154

9 January 1984 Infrared And Visible Detector Electronics For The Infrared Astronomical Satellite (IRAS)

D. L. Langford, J. J. Simmonds, T. Ozawa, E. C. Long, R. Paris

Proceedings Volume 0445, Instrumentation in Astronomy V; (1984) https://doi.org/10.1117/12.966154
Event: 1983 Astronomy Conferences, 1983, London, United Kingdom

Abstract

The Infrared Astronomical Satellite (IRAS) launched in January of 1983 utilizes a super-fluid helium cooled IR telescope and detector Focal Plane Array (FPA) to perform an all-sky survey in four wavelength bands from 8 to 118 micrometers. Temperatures at which different portions of the electronics must operate range from 2.5 to 280 K. The FPA consists of 62 infrared channels and 8 visible channels operating at 2.5 K. The IR detectors are grouped in eight 7 or 8 channel staggered linear suharrays with shared bias voltage; the visible detectors are grouped in two 4 channel skewed arrays, also with shared bias. Each IR channel detector is DC coupled to a TIA preamplifier through a very low power thermally isolated JFET source follower operating at approximately 65 K within the FPA housing. The TIA preamplifiers and bias supplies are located outside the telescope dewar and operate at approximately 280 K. The signal outputs from the preamplifiers are further processed by additional DC coupled gain amplifiers, filters and multiplexers prior to being digitized by a 16 bit analog to digital converter. The visible channel detectors are AC coupled to TIA preamplifiers and signal chain electronics using MOSFET source followers operating at approximately 2.5K within the FPA housing. This paper describes the detectors, preamplifiers and processing electronics, the system characterization test methods and results, and finally the performance of the detectors and electronics during the first month of on-orbit operation of the IRAS telescope.

Citation Download Citation

D. L. Langford, J. J. Simmonds, T. Ozawa, E. C. Long, and R. Paris "Infrared And Visible Detector Electronics For The Infrared Astronomical Satellite (IRAS)", Proc. SPIE 0445, Instrumentation in Astronomy V, (9 January 1984); https://doi.org/10.1117/12.966154

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available