JPS5726820A - Optical separator - Google Patents

Optical separator

Info

Publication number
JPS5726820A
JPS5726820A JP10150980A JP10150980A JPS5726820A JP S5726820 A JPS5726820 A JP S5726820A JP 10150980 A JP10150980 A JP 10150980A JP 10150980 A JP10150980 A JP 10150980A JP S5726820 A JPS5726820 A JP S5726820A
Authority
JP
Japan
Prior art keywords
zone
photometric
zones
distribution
reflection
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
JP10150980A
Other languages
Japanese (ja)
Inventor
Tetsushi Nose
Kiyonobu Endo
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP10150980A priority Critical patent/JPS5726820A/en
Priority to US06/283,233 priority patent/US4595290A/en
Priority to DE19813129164 priority patent/DE3129164A1/en
Priority to GB8122987A priority patent/GB2081893B/en
Publication of JPS5726820A publication Critical patent/JPS5726820A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/1086—Beam splitting or combining systems operating by diffraction only

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Exposure Control For Cameras (AREA)

Abstract

PURPOSE:To execute a uniform photometry corresponding to a luminance distribution of an object to be photographed, by varying stepwise or continuously a inclined angle on plural inclined reflection surfaces for forming a separated light beam, in the plane containing a relief type diffracted structure body. CONSTITUTION:In a photometric view field 53, an area 54 on which a reflection film has been provided like a relief type diffracted grid is separated into two zones, and they are nemed an A-zone and a B-zone from the center side of the photometric view field. When grid inclined angles of the A-zone and the B-zone are made alphaA, alphaB, grids are provided so as to be 45 deg.>=alphaA>alphaB. Reflection factors of a reflection film 57 of the A-zone and the B-zone are made uniform irrespective of a zone. As a result, a photometric sensitivity of the A-zone becomes higher than that of the B-zone, and a distribution of center part importance is attached to the photometric sensitivity. Said constitution is applied to two kinds of zones, and a shape of a zone and the number of zones are selected suitably in accordance with a desired photometric distribution.
JP10150980A 1980-07-24 1980-07-24 Optical separator Pending JPS5726820A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP10150980A JPS5726820A (en) 1980-07-24 1980-07-24 Optical separator
US06/283,233 US4595290A (en) 1980-07-24 1981-07-14 Device for measuring light incident on an optical system
DE19813129164 DE3129164A1 (en) 1980-07-24 1981-07-23 DEVICE FOR MEASURING LIGHT INTO AN OPTICAL SYSTEM
GB8122987A GB2081893B (en) 1980-07-24 1981-07-24 Splitting off part of a light beam and measuring its intensity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10150980A JPS5726820A (en) 1980-07-24 1980-07-24 Optical separator

Publications (1)

Publication Number Publication Date
JPS5726820A true JPS5726820A (en) 1982-02-13

Family

ID=14302548

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10150980A Pending JPS5726820A (en) 1980-07-24 1980-07-24 Optical separator

Country Status (1)

Country Link
JP (1) JPS5726820A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04293550A (en) * 1991-03-20 1992-10-19 Ngk Insulators Ltd Honeycomb catalyst for purifying exhaust gas and preparation thereof
US9623402B2 (en) 2013-04-30 2017-04-18 Mitsubishi Hitachi Power Systems, Ltd. Denitration catalyst and method for producing same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04293550A (en) * 1991-03-20 1992-10-19 Ngk Insulators Ltd Honeycomb catalyst for purifying exhaust gas and preparation thereof
US9623402B2 (en) 2013-04-30 2017-04-18 Mitsubishi Hitachi Power Systems, Ltd. Denitration catalyst and method for producing same

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