Low-cost thermo-electric infrared FPAs and their automotive applications

masaki Hirota, Yoshimi Ohta, Yasuhiro Fukuyama

研究成果: 著書/レポートタイプへの貢献会議での発言

11 引用 (Scopus)

抄録

This paper describes three low-cost infrared focal plane arrays (FPAs) having a 1,536, 2,304, and 10,800 elements and experimental vehicle systems. They have a low-cost potential because each element consists of p-n polysilicon thermocouples, which allows the use of low-cost ultra-fine micro-fabrication technology commonly employed in the conventional semiconductor manufacturing processes. To increase the responsivity of FPA, we have developed a precisely patterned Au-black absorber that has high infrared absorptivity of more than 90%. The FPA having a 2,304 elements achieved high resposivity of 4,300 V/W. In order to reduce package cost, we developed a vacuum-sealed package integrated with a molded ZnS lens. The camera aiming the temperature measurement of a passenger cabin is compact and light weight devices that measures 45 × 45 × 30 mm and weighs 190 g. The camera achieves a noise equivalent temperature deviation (NETD) of less than 0.7°C from 0 to 40°C. In this paper, we also present a several experimental systems that use infrared cameras. One experimental system is a blind spot pedestrian warning system that employs four infrared cameras. It can detect the infrared radiation emitted from a human body and alerts the driver when a pedestrian is in a blind spot. The system can also prevent the vehicle from moving in the direction of the pedestrian. Another system uses a visible-light camera and infrared sensors to detect the presence of a pedestrian in a rear blind spot and alerts the driver. The third system is a new type of human-machine interface system that enables the driver to control the car's audio system without letting go of the steering wheel. Uncooled infrared cameras are still costly, which limits their automotive use to high-end luxury cars at present. To promote widespread use of IR imaging sensors on vehicles, we need to reduce their cost further.

元の言語英語
ホスト出版物のタイトルInfrared Technology and Applications XXXIV
DOI
出版物ステータス出版済み - 6 30 2008
外部発表Yes
イベントInfrared Technology and Applications XXXIV - Orlando, FL, 米国
継続期間: 3 17 20083 20 2008

出版物シリーズ

名前Proceedings of SPIE - The International Society for Optical Engineering
6940
ISSN(印刷物)0277-786X

その他

その他Infrared Technology and Applications XXXIV
米国
Orlando, FL
期間3/17/083/20/08

Fingerprint

Infrared Focal Plane Array
Focal plane arrays
focal plane devices
cameras
Infrared radiation
Cameras
Costs
vehicles
Infrared Camera
Driver
Camera
Focal Plane
Railroad cars
costs
cabins
Audio systems
passengers
warning systems
sensors
infrared radiation

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

これを引用

Hirota, M., Ohta, Y., & Fukuyama, Y. (2008). Low-cost thermo-electric infrared FPAs and their automotive applications. : Infrared Technology and Applications XXXIV [694032] (Proceedings of SPIE - The International Society for Optical Engineering; 巻数 6940). https://doi.org/10.1117/12.780725

Low-cost thermo-electric infrared FPAs and their automotive applications. / Hirota, masaki; Ohta, Yoshimi; Fukuyama, Yasuhiro.

Infrared Technology and Applications XXXIV. 2008. 694032 (Proceedings of SPIE - The International Society for Optical Engineering; 巻 6940).

研究成果: 著書/レポートタイプへの貢献会議での発言

Hirota, M, Ohta, Y & Fukuyama, Y 2008, Low-cost thermo-electric infrared FPAs and their automotive applications. : Infrared Technology and Applications XXXIV., 694032, Proceedings of SPIE - The International Society for Optical Engineering, 巻. 6940, Infrared Technology and Applications XXXIV, Orlando, FL, 米国, 3/17/08. https://doi.org/10.1117/12.780725
Hirota M, Ohta Y, Fukuyama Y. Low-cost thermo-electric infrared FPAs and their automotive applications. : Infrared Technology and Applications XXXIV. 2008. 694032. (Proceedings of SPIE - The International Society for Optical Engineering). https://doi.org/10.1117/12.780725
Hirota, masaki ; Ohta, Yoshimi ; Fukuyama, Yasuhiro. / Low-cost thermo-electric infrared FPAs and their automotive applications. Infrared Technology and Applications XXXIV. 2008. (Proceedings of SPIE - The International Society for Optical Engineering).
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