JPS642028A - Diaphragm device for camera - Google Patents

Diaphragm device for camera

Info

Publication number
JPS642028A
JPS642028A JP15855287A JP15855287A JPS642028A JP S642028 A JPS642028 A JP S642028A JP 15855287 A JP15855287 A JP 15855287A JP 15855287 A JP15855287 A JP 15855287A JP S642028 A JPS642028 A JP S642028A
Authority
JP
Japan
Prior art keywords
actuator
diaphragm
voltage
camera
impressed
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
JP15855287A
Other languages
Japanese (ja)
Other versions
JPH012028A (en
Inventor
Yasuo Asakura
Toshiyuki Toyofuku
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.)
Olympus Corp
Original Assignee
Olympus Optical Co Ltd
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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP62-158552A priority Critical patent/JPH012028A/en
Priority claimed from JP62-158552A external-priority patent/JPH012028A/en
Priority to US07/193,045 priority patent/US4862207A/en
Publication of JPS642028A publication Critical patent/JPS642028A/en
Publication of JPH012028A publication Critical patent/JPH012028A/en
Pending legal-status Critical Current

Links

Landscapes

  • Diaphragms For Cameras (AREA)
  • Shutters For Cameras (AREA)

Abstract

PURPOSE: To impress a voltage equal to the voltage of a specified diaphragm aperture on an actuator after executing a reset action so as to attain the control of stop of high reproductivity by impressing a reset voltage for making a diaphragm blade in a previously specified reset state with the aid of the driving circuit of the diaphragm device for camera on the actuator.
CONSTITUTION: A bimorph type piezoelectric actuator 1 is provided on the diaphragm device for the camera and the voltage is impressed on the actuator 1 from an Av and Tv values operation means 21 as the driving circuit. The diaphragm blade 8 is made to open and close with an actuating mechanism according to the displacement of the actuator 1. The voltage for resetting the diaphragm blade 8 in the previously specified reset state with the aid of the operation means 21 as the driving circuit is impressed on the actuator 1. After executing the reset action, the voltage equal to that of the specified diaphragm aperture is impressed on the actuator 1, so that the lowering of precision in the control of the diaphragm caused by hysteresis characteristic can be prevented.
COPYRIGHT: (C)1989,JPO&Japio
JP62-158552A 1987-05-21 1987-06-24 camera aperture device Pending JPH012028A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP62-158552A JPH012028A (en) 1987-06-24 camera aperture device
US07/193,045 US4862207A (en) 1987-05-21 1988-05-18 Diaphragm apparatus for camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62-158552A JPH012028A (en) 1987-06-24 camera aperture device

Publications (2)

Publication Number Publication Date
JPS642028A true JPS642028A (en) 1989-01-06
JPH012028A JPH012028A (en) 1989-01-06

Family

ID=

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5043753A (en) * 1989-09-01 1991-08-27 Copal Company Limited Camera shutter blade device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5043753A (en) * 1989-09-01 1991-08-27 Copal Company Limited Camera shutter blade device

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