Infrared and Laser Engineering, Volume. 49, Issue 5, 20190361(2020)
A novel technology on infrared multi-band low-background detection
Figures & Tables(8)
Fig. 1. Ordinary temperature optical system of refraction-reflection
Fig. 5. Dual-band detection system by optical splitter based on ordinary temperature refraction-reflection optical system
Table 1. Self-radiation analysis of optical system
View tableView in ArticleTable 1. Self-radiation analysis of optical system
Parameter Wave band: 7.5-10.5 μm; Optical field of view: 2.5°×2.5°; f /# =2; Optical reflectivity: 99.2%;Lens transmission: 98.5%; Metal absorptivity: 20%; Metal reflectivity: 80% Type Ordinary temperature optical system of refraction-reflection Coaxial four anti optical system Low temperature optical system of refraction-reflection Energy of self-radiation/W 2.6×10−5 1.47×10−5 6.5×10−6 Equivalent blackbody temperature/K 223 204 183
Table 2. D* analysis
View tableView in ArticleTable 2. D* analysis
Stacked dual FPA（183 K） Two FPA（183 K） NEQ (ph·cm2·s−1)D *(cm·Hz1/2·W−1)NEQ (ph·cm2·s−1)D *(cm·Hz1/2·W−1)Band 1: 4×1011; Band 2: 6×1011 Band 1: 4.2×1011; Band 2: 3×1011 Band 1: 1.22×1011; Band 2: 2.15×1011 Band 1: 8×1011; Band 2: 5×1011
Table 3. Ability analysis of three different dual-band detection systems
View tableView in ArticleTable 3. Ability analysis of three different dual-band detection systems
TYPE Ordinary temperature refraction-reflection dual-band detection system Dual-FPA detection system Low temperature refraction-reflection dual-band detection system Main parameter Band 1: 7-8.5 μm; Band 2: 10-11.5 μm; Optical field of view：2.5°×2.5°; f /#=2;Equivalent blackbody temperature: 220 K; Band 1: 7-8.5 μm; Band 2: 10-11.5 μm; Optical field of view: 2.5°×2.5°; f /#=2;Equivalent blackbody temperatur: 183 K; Band 1: 7-8.5 μm; Band 2: 10-11.5 μm; Optical field of view: 2.5°×2.5°; f /#=2;Equivalent blackbody temperatur: 183 K; Theory parameter by calculation Int: 1.5 ms; Band 1 D *: 4×1011 (cm·Hz1/2·W−1);Band 2 D *: 2.5×1011 (cm·Hz1/2·W−1);Int: 3 ms; Band 1 D *:4.2×1011 (cm·Hz1/2·W−1);Band 2 D *:3×1011 (cm·Hz1/2·W−1);Int: 6 ms; Band 1 D *: 8×1011 (cm·Hz1/2·W−1);Band 2 D *: 5×1011 (cm·Hz1/2·W−1);NEFD（W/cm2） Band 1: 0.6×10−14; Band 2: 0.85×10−14 Band 1: 0.34×10−14; Band 2: 0.6×10−14 Band 1: 0.13×10−14; Band 2: 0.26×10−14
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Zheng Zhen, Yingrui Wang, Wen Ou, Jun Zhou, Ang Li. A novel technology on infrared multi-band low-background detection[J]. Infrared and Laser Engineering, 2020, 49(5): 20190361
Paper Information
Category: 红外技术及应用
Received: Dec. 22, 2019
Accepted: --
Published Online: Aug. 17, 2020
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