Abstract

We present an ultracompact infrared cryogenic camera integrated inside a standard Sofradir’s detector dewar cooler assembly (DDCA) whose field of view is equal to 120°. The multichannel optical architecture produces four nonredundant images on a single SCORPIO detector with a pixel pitch of 15 μm. This ultraminiaturized optical system brings a very low additional optical and mechanical mass to be cooled in the DDCA: the cool-down time is comparable to an equivalent DDCA without an imagery function. Limiting the number of channels is necessary to keep the highest number of resolved points in the final image. However, optical tolerances lead to irregular shifts between the channels. This paper discusses the limits of multichannel architectures. With an image-processing algorithm, the four images produced by the camera are combined to process a single full-resolution image with an equivalent sampling pitch equal to 7.5 μm. Experimental measurements on the modulation transfer function and noise equivalent temperature difference show that this camera achieves good optical performance.

© 2018 Optical Society of America

Compact infrared cryogenic wafer-level camera: design and experimental validation

Florence de la Barrière, Guillaume Druart, Nicolas Guérineau, Gilles Lasfargues, Manuel Fendler, Nicolas Lhermet, and Jean Taboury
Appl. Opt. 51(8) 1049-1060 (2012)

Reduction of material mass of optical component in cryogenic camera by using high-order Fresnel lens on a thin germanium substrate

Tatiana Grulois, Guillaume Druart, Hervé Sauer, Mathieu Chambon, Nicolas Guérineau, Serge Magli, Gillles Lasfargues, and Pierre Chavel
Appl. Opt. 54(20) 6313-6320 (2015)

Modulation transfer function measurement of a multichannel optical system

Florence de la Barrière, Guillaume Druart, Nicolas Guérineau, Jean Taboury, Jérôme Primot, and Joël Deschamps
Appl. Opt. 49(15) 2879-2890 (2010)

Demonstration of an infrared microcamera inspired by Xenos peckii vision

Guillaume Druart, Nicolas Guérineau, Riad Haïdar, Sophie Thétas, Jean Taboury, Sylvain Rommeluère, Jérôme Primot, and Manuel Fendler
Appl. Opt. 48(18) 3368-3374 (2009)

Design and characterization of thin multiple aperture infrared cameras

A. Portnoy, N. Pitsianis, X. Sun, D. Brady, R. Gibbons, A. Silver, R. Te Kolste, C. Chen, T. Dillon, and D. Prather
Appl. Opt. 48(11) 2115-2126 (2009)