JPS522481A - System of detecting non-standard contrast changes in dark place with h igh sensitivity - Google Patents

System of detecting non-standard contrast changes in dark place with h igh sensitivity

Info

Publication number
JPS522481A
JPS522481A JP7830475A JP7830475A JPS522481A JP S522481 A JPS522481 A JP S522481A JP 7830475 A JP7830475 A JP 7830475A JP 7830475 A JP7830475 A JP 7830475A JP S522481 A JPS522481 A JP S522481A
Authority
JP
Japan
Prior art keywords
igh
sensitivity
dark place
detecting non
contrast changes
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
JP7830475A
Other languages
Japanese (ja)
Inventor
Shinzo Shioda
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP7830475A priority Critical patent/JPS522481A/en
Publication of JPS522481A publication Critical patent/JPS522481A/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
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/04—Optical or mechanical part supplementary adjustable parts
    • 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
    • G01J1/02—Details
    • G01J1/04—Optical or mechanical part supplementary adjustable parts
    • G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
    • G01J1/0422—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings using light concentrators, collectors or condensers

Landscapes

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

Abstract

PURPOSE:To detect an ultra-slight light source by providing a cover having a plated inner side between a CDS and a lens.
JP7830475A 1975-06-23 1975-06-23 System of detecting non-standard contrast changes in dark place with h igh sensitivity Pending JPS522481A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7830475A JPS522481A (en) 1975-06-23 1975-06-23 System of detecting non-standard contrast changes in dark place with h igh sensitivity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7830475A JPS522481A (en) 1975-06-23 1975-06-23 System of detecting non-standard contrast changes in dark place with h igh sensitivity

Publications (1)

Publication Number Publication Date
JPS522481A true JPS522481A (en) 1977-01-10

Family

ID=13658176

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7830475A Pending JPS522481A (en) 1975-06-23 1975-06-23 System of detecting non-standard contrast changes in dark place with h igh sensitivity

Country Status (1)

Country Link
JP (1) JPS522481A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61234291A (en) * 1986-04-14 1986-10-18 Hitachi Ltd Oil feeding amount controller of oil-free screw hydraulic machine
FR2652649A1 (en) * 1989-09-29 1991-04-05 Firematel Sarl Static filter rejecting parasitic electromagnetic radiation, for optical smoke detectors

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61234291A (en) * 1986-04-14 1986-10-18 Hitachi Ltd Oil feeding amount controller of oil-free screw hydraulic machine
JPH0320600B2 (en) * 1986-04-14 1991-03-19 Hitachi Ltd
FR2652649A1 (en) * 1989-09-29 1991-04-05 Firematel Sarl Static filter rejecting parasitic electromagnetic radiation, for optical smoke detectors

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