FR2495419B1 - EXPOSURE LOCKING DEVICE FOR CAMERA - Google Patents

EXPOSURE LOCKING DEVICE FOR CAMERA

Info

Publication number
FR2495419B1
FR2495419B1 FR8122505A FR8122505A FR2495419B1 FR 2495419 B1 FR2495419 B1 FR 2495419B1 FR 8122505 A FR8122505 A FR 8122505A FR 8122505 A FR8122505 A FR 8122505A FR 2495419 B1 FR2495419 B1 FR 2495419B1
Authority
FR
France
Prior art keywords
camera
locking device
exposure locking
exposure
locking
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.)
Expired
Application number
FR8122505A
Other languages
French (fr)
Other versions
FR2495419A1 (en
Inventor
Shigeo Enomoto
Hitoshi Hirobe
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.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo 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 Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Publication of FR2495419A1 publication Critical patent/FR2495419A1/en
Application granted granted Critical
Publication of FR2495419B1 publication Critical patent/FR2495419B1/en
Expired 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
    • G03B7/081—Analogue circuits
    • G03B7/085—Analogue circuits for control of aperture
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/749—Circuitry for compensating brightness variation in the scene by influencing the pick-up tube voltages
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/75—Circuitry for compensating brightness variation in the scene by influencing optical camera components

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Control For Cameras (AREA)
  • Diaphragms For Cameras (AREA)
FR8122505A 1980-12-01 1981-12-01 EXPOSURE LOCKING DEVICE FOR CAMERA Expired FR2495419B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1980172380U JPS5796422U (en) 1980-12-01 1980-12-01

Publications (2)

Publication Number Publication Date
FR2495419A1 FR2495419A1 (en) 1982-06-04
FR2495419B1 true FR2495419B1 (en) 1986-06-13

Family

ID=15940831

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8122505A Expired FR2495419B1 (en) 1980-12-01 1981-12-01 EXPOSURE LOCKING DEVICE FOR CAMERA

Country Status (4)

Country Link
JP (1) JPS5796422U (en)
DE (1) DE3147567C2 (en)
FR (1) FR2495419B1 (en)
GB (1) GB2091431B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57200017A (en) * 1981-06-03 1982-12-08 Sony Corp Aperture locking device
DE3342992A1 (en) * 1982-11-29 1984-05-30 Canon K.K., Tokio/Tokyo Image converter device
JPS5999880A (en) * 1982-11-29 1984-06-08 Canon Inc Image pickup device
JP2501782B2 (en) * 1983-09-16 1996-05-29 株式会社ニコン Image scanning device
KR910008286Y1 (en) * 1988-07-12 1991-10-15 삼성전자 주식회사 Auto-exposure control circuit of video camera

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3324779A (en) * 1964-05-26 1967-06-13 Asahi Optical Co Ltd Photoelectric time control shutter circuit for photographic camera
DE1230845C2 (en) * 1964-11-20 1973-07-12 Fernseh Gmbh Circuit arrangement for regulating the level of a video signal
US3555181A (en) * 1968-06-05 1971-01-12 Bell Telephone Labor Inc Automatic video level control employing iris and amplifier gain adjustments
US3651255A (en) * 1969-02-22 1972-03-21 Sony Corp Automatic gain control system for television cameras
NL7701811A (en) * 1977-02-21 1978-08-23 Philips Nv TELEVISION CAMERA EQUIPPED WITH AN APERTURE CONTROL AND AN ADJUSTABLE IMAGE SIGNAL GAIN CIRCUIT.
JPS56104579A (en) * 1980-01-23 1981-08-20 Nec Corp Television camera device

Also Published As

Publication number Publication date
GB2091431A (en) 1982-07-28
JPS5796422U (en) 1982-06-14
GB2091431B (en) 1984-06-20
FR2495419A1 (en) 1982-06-04
DE3147567C2 (en) 1985-01-10
DE3147567A1 (en) 1982-06-03

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Legal Events

Date Code Title Description
DL Decision of the director general to leave to make available licences of right