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JPS5635127A - Photometric device of camera - Google Patents

Photometric device of camera

Info

Publication number
JPS5635127A
JPS5635127A JP11127779A JP11127779A JPS5635127A JP S5635127 A JPS5635127 A JP S5635127A JP 11127779 A JP11127779 A JP 11127779A JP 11127779 A JP11127779 A JP 11127779A JP S5635127 A JPS5635127 A JP S5635127A
Authority
JP
Japan
Prior art keywords
reflecting surfaces
blade
reflecting surface
rotating
exposure
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
JP11127779A
Other languages
Japanese (ja)
Inventor
Yoshiaki Mizuki
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.)
OSAWA SEIMITSU KOGYO KK
Original Assignee
OSAWA SEIMITSU KOGYO KK
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 OSAWA SEIMITSU KOGYO KK filed Critical OSAWA SEIMITSU KOGYO KK
Priority to JP11127779A priority Critical patent/JPS5635127A/en
Publication of JPS5635127A publication Critical patent/JPS5635127A/en
Pending legal-status Critical Current

Links

Landscapes

  • Exposure Control For Cameras (AREA)
  • Shutters For Cameras (AREA)

Abstract

PURPOSE: To improve the averaging of exposure values with a photometric device by providing an intermediate reflecting surface at an angle of inclination differing from that of other reflecting surfaces and so constituting the other reflecting surfaces that the distances from the rotating axial center of a rotating blade change.
CONSTITUTION: The 1st and 2nd reflecting surfaces 15, 16 respectively form part of nearly a circular cone shape and an intermediate reflecting surface 17 has an angle of inclination differing from that of other reflecting surfaces 15, 16. Hence, when the photographing is stopped and a blade 8 is stopped in the position where it shuts off the passage of incident rays, the intermediate reflecting surface 17 sends the incident rays L to an exposure device 7 at all times, thus the quantity thereof becomes equal to the mean quantity of light entering the exposure device during the rotation of the blade 8. In addition, the 1st and 2nd reflecting surfaces 15, 16 are so formed respectively that the side near the intermediate reflecting surface 17 goes closer to the rotating center of the blade 8 and the side further therefrom goes apart therefrom. Hence, the photometry of various portions of the subject may be performed and the more averaged exposure value may be obtained.
COPYRIGHT: (C)1981,JPO&Japio
JP11127779A 1979-08-31 1979-08-31 Photometric device of camera Pending JPS5635127A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11127779A JPS5635127A (en) 1979-08-31 1979-08-31 Photometric device of camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11127779A JPS5635127A (en) 1979-08-31 1979-08-31 Photometric device of camera

Publications (1)

Publication Number Publication Date
JPS5635127A true JPS5635127A (en) 1981-04-07

Family

ID=14557137

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11127779A Pending JPS5635127A (en) 1979-08-31 1979-08-31 Photometric device of camera

Country Status (1)

Country Link
JP (1) JPS5635127A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4665256A (en) * 1983-04-29 1987-05-12 The Dow Chemical Company Alkylation of aromatic mixtures

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4665256A (en) * 1983-04-29 1987-05-12 The Dow Chemical Company Alkylation of aromatic mixtures

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