Scattering simulation software dedicated to the design of cooled infrared detector optical shieldings

Nicolas Gerin; Philippe Chorier

doi:10.1117/12.328027

26 October 1998 Scattering simulation software dedicated to the design of cooled infrared detector optical shieldings

Nicolas Gerin, Philippe Chorier

Proceedings Volume 3436, Infrared Technology and Applications XXIV; (1998) https://doi.org/10.1117/12.328027
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

When designing cooled infrared detectors, it is definitely a challenge to get simultaneously high optical efficiency and low radiative heat load of the cold shield. From an optical point of view, cold shield must be as big and absorbing as possible. But the reduction of cooler size, input power and cool down time require precisely an opposite approach. This critical optimization is emphasized by the necessity of conducting long and expensive experiments since radiative exchanges have been extremely complex and can not be accurately estimated by calculation. Recent optical concepts as BRDF (Bidirectional Reflectance Distribution Function) and the increase of computer processor speed have made possible the development of a lighting software for this topic. This software was developed by upgrading an existing non-sequential light propagation one. Upgrades apply particularly to capabilities of modeling complex geometries as IR focal planes, taking into account spectral dependency of radiative properties of surfaces and volumes and introduction of the diffusion behavior of actual surfaces (BRDF). BRDF properties of most current surfaces were measured at both ambient and low temperatures. At least, the software was qualified by comparison of computed and experimental results of exceeding photon fluxes in actual detector. This CAD approach is of high interest in cost driving designs by simplifying cold shield systems and in application where there is very low scene photon fluxes.

Citation Download Citation

Nicolas Gerin and Philippe Chorier "Scattering simulation software dedicated to the design of cooled infrared detector optical shieldings", Proc. SPIE 3436, Infrared Technology and Applications XXIV, (26 October 1998); https://doi.org/10.1117/12.328027

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
11 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Geometrical optics

Sensors

Computer aided design

Software development

Scattering

Temperature metrology

Bidirectional reflectance transmission function

Show All Keywords

Keywords/Phrases

Search In:

Publication Years