• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Lock-in detection system for images

Research Project

Project/Area Number 10650409
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Measurement engineering
Research InstitutionKobe University

Principal Investigator

MINEMOTO Takumi  KOBE UNIVERSITY, FACULTY OF ENGINEERING, PROFESSOR, 工学部, 教授 (60031093)

Co-Investigator(Kenkyū-buntansha) NAKAGAWA Kiyoshi  KOBE UNIVERSITY, FACULTY OF ENGINEERING, ASSOCIATE RESEARCHER, 工学部, 助手 (50198032)
Project Period (FY) 1998 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 1999: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1998: ¥2,000,000 (Direct Cost: ¥2,000,000)
Keywordsimage detection / lock-in detection / spatial light modulator / Pockels effect / electroabsorption effect / 電界吸収効果
Research Abstract

First the dependence of the Pockels effect in the spatial light modulator that used a BiィイD212ィエD2SiOィイD220ィエD2 single crystal (BSO-SLM) on the frequency of externally applied high ac voltage was measured. Next an image lock-in detection system was contracted with the BSO-SLM. The following characteristics of the system : selectivity of the modulation frequency and its phase in the modulation, and linearity of output signal for numbers of integration, were also measured.
Using the lock-in detection system with BSO-SLM, the image modulated with an defined frequency (100 Hz) was extracted from a simple scene image that contained the image and other back ground image. Interference fringes running on an object surface with various defined speeds were also successively detected using the lock-in detection system.
Providing for a lock-in system with fast response, a spatial light modulator that used a GaAs single crystal plate (GaAs-SLM) was developed. The GaAs-SLM can convert visible images to its near infrared images with a speed larger than 1000 frames/s.

Report

(3 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] Youichi Bitou: "High-contract spatial light modulator by use of the electro absorption and electro-optic effects in a GaAs single crystal"Applied Optics. 37. 4347-4356 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Youichi Bitou: "Dependence of the contrast ratio on crystal thickness in an electro absorptive spatial light modulator that uses GaAs"Applied Optics. 37. 8227-8232 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Youichi Bitou: "High speed incoherent-to coherent image converter using GaAs"Optics and Optoelectronics. 1. 80-83 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Youichi Bitou: "High-speed and high-contrast incoherent-to-coherent converter that uses a GaAs single crystal"Optical Engineering. 38. 710-716 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Y.Bitou and T.Minemoto: "High-contrast spatial light modulator by use of the electroabsorption and electro-optic effects in a GaAs single crystal"Appl. Opt.. 37-20. 4347-4356 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Y.Bitou and T.Minemoto: "Dependence of the contrast ratio on crystal thickness in an electroabsorptive spatial light modulator that uses GaAs"Appl. Opt.. 37-35. 8227-8232 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Y.Bitou and T.Minemoto: "High-speed incoherent-to-coherent image converter using GaAs"Optics and Optoelectronics. 1. 80-83 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Y.Bitou, Y.Osugi, and T.Minemoto: "High-speed and high-contrast incoherent-to-coherent converter that uses a GaAs single crystal"Opt. Eng.. 38-4. 710-716 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Youichi Bitou: "High-contrast spatial light modulator by use of the electroabsorption and electro-optic effects in GaAs singlecrystal"Applied Optics. 37・20. 4347-4356 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] Youichi Bitou: "Dependence of the contrast ratio on crystal thickness in an electroabsorptive spatial light modulator that uses GaAs."Applied Optics. 37・35. 8227-8232 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] Youichi Bitou: "High speed in coherent-to-coherent image converter using GaAs"Optics and Optoelctronics. 1. 80-83 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] Youichi Bitou: "High-speed and high-contrast incohevent-to-coherent converter that uses a GaAs single crystal"Optical Engineering. 38. 710-716 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Y.Bitou: "High Speed Incoherent-to-Coherent Image Converter Using GaAs" Optics and Optoelectronics. 1. 80-83 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Y.Bitou: "High Speed and high-contrast incoherent-to-coherent converter that uses GaAs single crystal" Optical Engineering. 38・4. (1999)

    • Related Report
      1998 Annual Research Report

URL: 

Published: 1998-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi