Attainment of high sensitivity at elevated operating temperatures with staring hybrid HgCdTe-on-sapphire focal plane arrays

Journal Article · Tue Mar 01 04:00:00 EST 1994 · Optical Engineering; (United States)

DOI:https://doi.org/10.1117/12.163405· OSTI ID:7043685

Kozlowski, L J; McLevige, W V; Cabelli, S A; Vanderwyck, A H; Cooper, D E; Blazejewski, E R; Vural, K; Tennant, W E ^[1]

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1. Rockwell International Science Center, Thousand Oaks, CA (United States)

Cost-effective high-performance IR imaging cameras need affordable staring focal plane arrays (FPAs) that can operate effectively at temperatures compatible with inexpensive long-life coolers. The authors report on staring hybrid 128 [times] 128 and 256 [times] 256 Hg[sub 1[minus]x]Cd[sub x]Te FPAs that have requisite yield, sensitivity, operability, and reliability at a medium-wavelength IR (MWIR) cutoff wavelength and elevated operating temperatures. Mean 256 [times] 256 FPA noise-equivalent temperature differences (NE[Delta]T) using broadband f/1.7 optics were 4.3, 7.7, and 55 mK at 120, 140, and 180 K, respectively. They extrapolate that camera NE[Delta]T [<=] 0.02 K can be achieved at 190 K using optimized [lambda][sub c] of [approximately]4.4 [mu]m (180 K), a 3.4- to 4.2-[mu]m bandpass filter, and f/1 optics. Because the CMOS multiplexers have a low-power dissipation and need little ancillary circuitry in the dewar, a viable thermoelectrically-cooled FPA technology is thus implied once the [lambda][sub c] is optimized for MWIR imaging.

• OSTI ID: 7043685
• Journal Information: Optical Engineering; (United States), Journal Name: Optical Engineering; (United States) Vol. 33:3; ISSN 0091-3286; ISSN OPEGAR
• Country of Publication: United States
• Language: English

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CADMIUM COMPOUNDS
CADMIUM TELLURIDES
CAMERAS
CHALCOGENIDES
COOLING
DETECTION
ELECTROMAGNETIC RADIATION
FABRICATION
IMAGES
INFRARED RADIATION
MEASURING INSTRUMENTS
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