JPS5637526A - Photometric device - Google Patents

Photometric device

Info

Publication number
JPS5637526A
JPS5637526A JP11400379A JP11400379A JPS5637526A JP S5637526 A JPS5637526 A JP S5637526A JP 11400379 A JP11400379 A JP 11400379A JP 11400379 A JP11400379 A JP 11400379A JP S5637526 A JPS5637526 A JP S5637526A
Authority
JP
Japan
Prior art keywords
light splitter
light
polarizing plate
condenser lens
eyepiece
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
JP11400379A
Other languages
Japanese (ja)
Inventor
Kazuya Matsumoto
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 JP11400379A priority Critical patent/JPS5637526A/en
Publication of JPS5637526A publication Critical patent/JPS5637526A/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
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

PURPOSE:To make reliability higher by disposing a polarizing plate behind a light splitter. CONSTITUTION:A polarizing plate 51 which removes the polarization components that can be diffracted by a light splitter 16 is disposed between a pentagonal prism 18 and an eyepiece 19 or between the eyepiece 19 and eyes 20 or between the pentagonal prism 18 and a condenser lens 17 or further between the condenser lens 17 and the light splitter 16. As a result, at the time the light from outside enters the light splitter 16 after having been imaged on a focus glass 15 by a taking lens 10 and enters the eyes 20 past the condenser lens 17 etc., the light on the optical axis reverse incident to the light splitter 16 past the polarizing plate 51 becomes only the P polarized component with respect to the diffracrion grating of the light splitter 16 and is hardly deffracted; in addition, the liminous flux once reflected and entering the diffraction grating again is more diffracted, thus the errors of photometry are removed.
JP11400379A 1979-09-05 1979-09-05 Photometric device Pending JPS5637526A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11400379A JPS5637526A (en) 1979-09-05 1979-09-05 Photometric device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11400379A JPS5637526A (en) 1979-09-05 1979-09-05 Photometric device

Publications (1)

Publication Number Publication Date
JPS5637526A true JPS5637526A (en) 1981-04-11

Family

ID=14626616

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11400379A Pending JPS5637526A (en) 1979-09-05 1979-09-05 Photometric device

Country Status (1)

Country Link
JP (1) JPS5637526A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4517031A (en) * 1982-11-12 1985-05-14 Kawasaki Steel Corporation Method of manufacturing cold rolled steel sheets for extra deep drawing with an excellent press formability

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4517031A (en) * 1982-11-12 1985-05-14 Kawasaki Steel Corporation Method of manufacturing cold rolled steel sheets for extra deep drawing with an excellent press formability

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