Pioneer-Venus Large Probe Infrared Radiometer (LIR) Optical System

F. Gerald Brown; Jerry Gilland; Ralph Hassig; R. W. Boese

doi:10.1117/12.955851

9 November 1977 Pioneer-Venus Large Probe Infrared Radiometer (LIR) Optical System

F. Gerald Brown, Jerry Gilland, Ralph Hassig, R. W. Boese

Proceedings Volume 0124, Modern Utilization of Infrared Technology III; (1977) https://doi.org/10.1117/12.955851
Event: 21st Annual Technical Symposium, 1977, San Diego, United States

Abstract

The LIR instrument has been developed for the NASA Ames Research Center for use in the 1978 Venus Atmospheric Probe Mission. The mission objectives are to determine the nature and composition of the clouds, the composition and structure of the atmosphere, and the atmospheric circulation pattern of the planet Venus. The The Large Probe Infrared Radiometer (LIR) is a six-channel (3 to 50 μm) internally calibrated radiometer which measures the radiance difference at ±45° to the horizontal as viewed through a single diamond window in the spacecraft. The LIR optical system consists of a unique arrangement of hollow light pipes which optically couple a six element detector/filter array to the spacecraft window while mechanically and thermally isolating the array from the window's harsh thermal environment. A single rotating section with a 45° bend and containing a collimator alternately views up and down through director/extender pipes located adjacent to the diamond window. Light is transferred from the rotating section to a fixed section containing a diamond diffuser to scramble the light. This minimizes asymmetries and improves channel field of view overlap.

Citation Download Citation

F. Gerald Brown, Jerry Gilland, Ralph Hassig, and R. W. Boese "Pioneer-Venus Large Probe Infrared Radiometer (LIR) Optical System", Proc. SPIE 0124, Modern Utilization of Infrared Technology III, (9 November 1977); https://doi.org/10.1117/12.955851

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