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JPS51144645A - Photo-divider - Google Patents

Photo-divider

Info

Publication number
JPS51144645A
JPS51144645A JP50068776A JP6877675A JPS51144645A JP S51144645 A JPS51144645 A JP S51144645A JP 50068776 A JP50068776 A JP 50068776A JP 6877675 A JP6877675 A JP 6877675A JP S51144645 A JPS51144645 A JP S51144645A
Authority
JP
Japan
Prior art keywords
divider
photo
diffraction grating
diffract
ensuring
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
JP50068776A
Other languages
Japanese (ja)
Inventor
Kazuya Matsumoto
Susumu Matsumura
Aiichiro Koyama
Yoichi Okuno
Tokuichi Tsunekawa
Tadashi Ito
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 JP50068776A priority Critical patent/JPS51144645A/en
Priority to US05/691,628 priority patent/US4103153A/en
Publication of JPS51144645A publication Critical patent/JPS51144645A/en
Priority to US05/869,447 priority patent/US4178084A/en
Pending legal-status Critical Current

Links

Landscapes

  • Exposure Control For Cameras (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

PURPOSE: The diffraction grating of a photo-divider can diffract only a specified wavelength light in extremely many numbers, ensuring the visual recognition of the photometry part of images by a camera focussing plate that uses the diffraction grating.
COPYRIGHT: (C)1976,JPO&Japio
JP50068776A 1975-06-06 1975-06-06 Photo-divider Pending JPS51144645A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP50068776A JPS51144645A (en) 1975-06-06 1975-06-06 Photo-divider
US05/691,628 US4103153A (en) 1975-06-06 1976-06-01 Device for measuring light incident on an image forming optical system
US05/869,447 US4178084A (en) 1975-06-06 1978-01-16 Device for measuring light incident on an image forming optical system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50068776A JPS51144645A (en) 1975-06-06 1975-06-06 Photo-divider

Publications (1)

Publication Number Publication Date
JPS51144645A true JPS51144645A (en) 1976-12-11

Family

ID=13383464

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50068776A Pending JPS51144645A (en) 1975-06-06 1975-06-06 Photo-divider

Country Status (1)

Country Link
JP (1) JPS51144645A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62237435A (en) * 1986-04-08 1987-10-17 Canon Inc Photometer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62237435A (en) * 1986-04-08 1987-10-17 Canon Inc Photometer

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