JPS5566723A - Fork-type optical chopper - Google Patents

Fork-type optical chopper

Info

Publication number
JPS5566723A
JPS5566723A JP14033778A JP14033778A JPS5566723A JP S5566723 A JPS5566723 A JP S5566723A JP 14033778 A JP14033778 A JP 14033778A JP 14033778 A JP14033778 A JP 14033778A JP S5566723 A JPS5566723 A JP S5566723A
Authority
JP
Japan
Prior art keywords
fork
beam sections
light
light signal
type optical
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.)
Granted
Application number
JP14033778A
Other languages
Japanese (ja)
Other versions
JPS5914178B2 (en
Inventor
Junichi Shioda
Takayuki Kawana
Tsutomu Aoyama
Ikutaro Kobayashi
Junichiro Minowa
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.)
NEC Corp
Nippon Telegraph and Telephone Corp
Original Assignee
NEC Corp
Nippon Telegraph and Telephone Corp
Nippon Electric Co 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 NEC Corp, Nippon Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP14033778A priority Critical patent/JPS5914178B2/en
Publication of JPS5566723A publication Critical patent/JPS5566723A/en
Publication of JPS5914178B2 publication Critical patent/JPS5914178B2/en
Expired 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
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
    • G01J1/20—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle
    • G01J1/34—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using separate light paths used alternately or sequentially, e.g. flicker
    • G01J1/36—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using separate light paths used alternately or sequentially, e.g. flicker using electric radiation detectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

PURPOSE:To obtain a fork-type optical chopper, whose excitation power and oscillation leakage and variation of oscillation frequency by aging are small, by attaching a shutter inside a beam section of a fork oscillator having 2 beam sections, so that incoming light can be screened. CONSTITUTION:Shutters are attached to inside of respective fork beam sections 22 in such a manner that when the beam sections 22 are not vibrating there is a gap allowing a beam-like light signal to pass through and that the beam sections are crossing each other without contacting each other in the condition that they are making maximum displacement inwardly. The light signal is concentrated by No.1 lens so that the focus comes to the center of the gap of the shutters, and then, it is converted into a horizontal light by No.2 lens. Since, in this mechanism, light is screened when the beam sections 22 are displaced inwardly by eual amount, each beam section is required to be displaced by only 1/2 of displacement required for intermitting the light signal, and therefore, it is possible to reduce exciting power, oscillation leakage and variation of oscillation frequency by aging.
JP14033778A 1978-11-14 1978-11-14 Tuning fork type light chiyotsupa Expired JPS5914178B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14033778A JPS5914178B2 (en) 1978-11-14 1978-11-14 Tuning fork type light chiyotsupa

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14033778A JPS5914178B2 (en) 1978-11-14 1978-11-14 Tuning fork type light chiyotsupa

Publications (2)

Publication Number Publication Date
JPS5566723A true JPS5566723A (en) 1980-05-20
JPS5914178B2 JPS5914178B2 (en) 1984-04-03

Family

ID=15266472

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14033778A Expired JPS5914178B2 (en) 1978-11-14 1978-11-14 Tuning fork type light chiyotsupa

Country Status (1)

Country Link
JP (1) JPS5914178B2 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59144436U (en) * 1983-03-11 1984-09-27 三洋電機株式会社 infrared detector
JPS59230127A (en) * 1984-04-12 1984-12-24 Sanyo Electric Co Ltd Infrared-ray detecting device
JPS60128317A (en) * 1983-12-15 1985-07-09 Sanyo Electric Co Ltd Infrared sensor
JPS60170820A (en) * 1984-02-15 1985-09-04 Sanyo Electric Co Ltd Optical controller
JPS60170819A (en) * 1984-02-15 1985-09-04 Sanyo Electric Co Ltd Optical controller
JPS60170821A (en) * 1984-02-15 1985-09-04 Sanyo Electric Co Ltd Optical controller
JPS60150518U (en) * 1984-03-14 1985-10-05 三洋電機株式会社 light controller
JPS63500331A (en) * 1985-07-16 1988-02-04 ザ　フオツクスボロ−　カンパニ− Major land sensing method and device
JPH0694531A (en) * 1992-09-17 1994-04-05 Matsushita Electric Ind Co Ltd Thermal image detector

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0317229Y2 (en) * 1983-03-11 1991-04-11
JPS59144436U (en) * 1983-03-11 1984-09-27 三洋電機株式会社 infrared detector
JPH0414290B2 (en) * 1983-12-15 1992-03-12 Sanyo Electric Co
JPS60128317A (en) * 1983-12-15 1985-07-09 Sanyo Electric Co Ltd Infrared sensor
JPS60170820A (en) * 1984-02-15 1985-09-04 Sanyo Electric Co Ltd Optical controller
JPS60170819A (en) * 1984-02-15 1985-09-04 Sanyo Electric Co Ltd Optical controller
JPS60170821A (en) * 1984-02-15 1985-09-04 Sanyo Electric Co Ltd Optical controller
JPS60150518U (en) * 1984-03-14 1985-10-05 三洋電機株式会社 light controller
JPH0125928Y2 (en) * 1984-03-14 1989-08-03
JPH037890B2 (en) * 1984-04-12 1991-02-04 Sanyo Electric Co
JPS59230127A (en) * 1984-04-12 1984-12-24 Sanyo Electric Co Ltd Infrared-ray detecting device
JPS63500331A (en) * 1985-07-16 1988-02-04 ザ　フオツクスボロ−　カンパニ− Major land sensing method and device
JPH0694531A (en) * 1992-09-17 1994-04-05 Matsushita Electric Ind Co Ltd Thermal image detector

Also Published As

Publication number Publication date
JPS5914178B2 (en) 1984-04-03

Similar Documents

Publication Publication Date Title
GB1535544A (en) Tunable lasers
DE3380498D1 (en) Stabilized fiber optic sensor
JPS5743485A (en) Semiconductor ring laser device
JPS5566723A (en) Fork-type optical chopper
JPS5238939A (en) Optical coupler
JPS5546687A (en) Ultra-broad-band light transmission system using outside high-dielectric-constant type focusing optical fiber and mode filter
JPS57207216A (en) Optical deflector
JPS55116227A (en) Light chopper
JPS5713789A (en) Solid state laser oscillator
JPS53146587A (en) Laser gyro
JPS5347851A (en) Coupling element for optical branching
JPS5748710A (en) Optical wave branching filter
JPS5775486A (en) Laser device
JPS57124490A (en) Coupler for semiconductor laser and optical fiber
JPS52106778A (en) Absorbance measuring apparatus using laser
JPS6435423A (en) Light wavelength conversion module
JPS56103548A (en) Light wave delay/oscillation device
JPS5495240A (en) Light scanner
JPS5594132A (en) Delayed time difference measuring apparatus for optical fiber group
JPS55163424A (en) Temperature detector
JPS57211033A (en) Measuring method for group delay time difference of optical fiber
JPS551138A (en) Multi-wavelength laser beam oscillator
JPS5399791A (en) Waveguide type solid state laser unit
JPS5693386A (en) Variable wavelength laser
JPS56116682A (en) Solid-state laser head