JPS56102835A - Stop control device of camera - Google Patents

Stop control device of camera

Info

Publication number
JPS56102835A
JPS56102835A JP545780A JP545780A JPS56102835A JP S56102835 A JPS56102835 A JP S56102835A JP 545780 A JP545780 A JP 545780A JP 545780 A JP545780 A JP 545780A JP S56102835 A JPS56102835 A JP S56102835A
Authority
JP
Japan
Prior art keywords
servomotor
stop
pulses
stopping
returned
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
JP545780A
Other languages
Japanese (ja)
Inventor
Fumiaki Hiraike
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta 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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP545780A priority Critical patent/JPS56102835A/en
Publication of JPS56102835A publication Critical patent/JPS56102835A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
    • G03B7/091—Digital circuits
    • G03B7/095—Digital circuits for control of aperture

Landscapes

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

Abstract

PURPOSE:To make the stopping-down speed high, by operating the DC servomotor by the stop value of the stop blade based on object luminance information to perform the stopping-down operation and the stop in the stop position. CONSTITUTION:When the shutter release button is depressed, a proper stop value is determined in the light receiving operating part by object luminance information to device the servomotor. By rotation of servomotor 1, pulse generator 3 generates rotation angle detection pulses. These pulses are fed back to the deviation counter as subtraction pulses to control the rotation angle. Meanwhile, these pulses are converted to a proper voltage and are returned to the power amplifying part to control the rotation speed of servomotor 1 so that contents of the deviation counter become 0. By this signal, the shutter starts exposure. By the exposure end signal, the servomotor is driven in steps in the reverse direction by the instruction to the power amplifier, and the stop blade is returned to the initial position.
JP545780A 1980-01-19 1980-01-19 Stop control device of camera Pending JPS56102835A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP545780A JPS56102835A (en) 1980-01-19 1980-01-19 Stop control device of camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP545780A JPS56102835A (en) 1980-01-19 1980-01-19 Stop control device of camera

Publications (1)

Publication Number Publication Date
JPS56102835A true JPS56102835A (en) 1981-08-17

Family

ID=11611745

Family Applications (1)

Application Number Title Priority Date Filing Date
JP545780A Pending JPS56102835A (en) 1980-01-19 1980-01-19 Stop control device of camera

Country Status (1)

Country Link
JP (1) JPS56102835A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4862207A (en) * 1987-05-21 1989-08-29 Olympus Optical Company Limited Diaphragm apparatus for camera

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4862207A (en) * 1987-05-21 1989-08-29 Olympus Optical Company Limited Diaphragm apparatus for camera

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