JPS56115927A - Measuring method for characteristic of infrared-ray detector - Google Patents

Measuring method for characteristic of infrared-ray detector

Info

Publication number
JPS56115927A
JPS56115927A JP1991080A JP1991080A JPS56115927A JP S56115927 A JPS56115927 A JP S56115927A JP 1991080 A JP1991080 A JP 1991080A JP 1991080 A JP1991080 A JP 1991080A JP S56115927 A JPS56115927 A JP S56115927A
Authority
JP
Japan
Prior art keywords
detector
intermediary
lens
fall
frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1991080A
Other languages
Japanese (ja)
Inventor
Mitsuo Yoshikawa
Takayasu Fukuda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP1991080A priority Critical patent/JPS56115927A/en
Publication of JPS56115927A publication Critical patent/JPS56115927A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J9/00—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength
    • G01J9/04—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength by beating two waves of a same source but of different frequency and measuring the phase shift of the lower frequency obtained

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectrometry And Color Measurement (AREA)

Abstract

PURPOSE:To prevent the restriction of the upper limit of measured frequency by a method wherein a local oscillation light and a sweep light are made to fall on the detector which is an object of measurement and made to be subjected to heterodyne detection and the electric output thereof is observed by a frequency-dependent observing means. CONSTITUTION:The local oscillation light from a carbonic-acid gas laser LC is made to fall on the detector D which is the object of measurement through the intermediary of a beam splitter BS and a lens L2. Meanwhile, the sweep light whose frequency changes periodically is radiated from a diode laser LD and is made to fall on the detector D through the intermediary of a lens L1, the beam splitter BS and the lens L2. The detector D applies heterodyne detection to both incident lights and the output therefrom is given to a frequency response characteristic observing device SA through the intermediary of an intermediate frequency amplifier IFA.
JP1991080A 1980-02-19 1980-02-19 Measuring method for characteristic of infrared-ray detector Pending JPS56115927A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1991080A JPS56115927A (en) 1980-02-19 1980-02-19 Measuring method for characteristic of infrared-ray detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1991080A JPS56115927A (en) 1980-02-19 1980-02-19 Measuring method for characteristic of infrared-ray detector

Publications (1)

Publication Number Publication Date
JPS56115927A true JPS56115927A (en) 1981-09-11

Family

ID=12012362

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1991080A Pending JPS56115927A (en) 1980-02-19 1980-02-19 Measuring method for characteristic of infrared-ray detector

Country Status (1)

Country Link
JP (1) JPS56115927A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170209234A1 (en) * 2016-01-25 2017-07-27 Water Pik, Inc. Reduced form factor oral irrigator
US11642203B2 (en) 2016-01-25 2023-05-09 Water Pik, Inc. Oral irrigator handle with hose connector fittings

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170209234A1 (en) * 2016-01-25 2017-07-27 Water Pik, Inc. Reduced form factor oral irrigator
US11642203B2 (en) 2016-01-25 2023-05-09 Water Pik, Inc. Oral irrigator handle with hose connector fittings

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