GB2091431B - Exposure control system for a photographic or television camera - Google Patents

Exposure control system for a photographic or television camera

Info

Publication number
GB2091431B
GB2091431B GB8136221A GB8136221A GB2091431B GB 2091431 B GB2091431 B GB 2091431B GB 8136221 A GB8136221 A GB 8136221A GB 8136221 A GB8136221 A GB 8136221A GB 2091431 B GB2091431 B GB 2091431B
Authority
GB
United Kingdom
Prior art keywords
photographic
control system
exposure control
television camera
television
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
GB8136221A
Other languages
English (en)
Other versions
GB2091431A (en
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 GB2091431A publication Critical patent/GB2091431A/en
Application granted granted Critical
Publication of GB2091431B publication Critical patent/GB2091431B/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)
GB8136221A 1980-12-01 1981-12-01 Exposure control system for a photographic or television camera Expired GB2091431B (en)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
GB2091431A GB2091431A (en) 1982-07-28
GB2091431B true GB2091431B (en) 1984-06-20

Family

ID=15940831

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8136221A Expired GB2091431B (en) 1980-12-01 1981-12-01 Exposure control system for a photographic or television camera

Country Status (4)

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

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 (de) * 1982-11-29 1984-05-30 Canon K.K., Tokio/Tokyo Bildwandlereinrichtung
JPS5999880A (ja) * 1982-11-29 1984-06-08 Canon Inc 撮像装置
JP2501782B2 (ja) * 1983-09-16 1996-05-29 株式会社ニコン 画像走査装置
KR910008286Y1 (ko) * 1988-07-12 1991-10-15 삼성전자 주식회사 비디오 카메라의 자동 노출제어회로

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 (de) * 1964-11-20 1973-07-12 Fernseh Gmbh Schaltungsanordnung zur Regelung des Pegels eines Videosignals
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 (nl) * 1977-02-21 1978-08-23 Philips Nv Televisiekamera voorzien van een diafragma- regeling en een regelbare beeldsignaalver- sterkingsschakeling.
JPS56104579A (en) * 1980-01-23 1981-08-20 Nec Corp Television camera device

Also Published As

Publication number Publication date
DE3147567C2 (de) 1985-01-10
DE3147567A1 (de) 1982-06-03
JPS5796422U (enrdf_load_stackoverflow) 1982-06-14
GB2091431A (en) 1982-07-28
FR2495419B1 (fr) 1986-06-13
FR2495419A1 (fr) 1982-06-04

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Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)
PE20 Patent expired after termination of 20 years

Effective date: 20011130