JPS59108455A - Ｃｃｔｖカメラ用自動絞りレンズの自動絞り制御装置 - Google Patents

Ｃｃｔｖカメラ用自動絞りレンズの自動絞り制御装置

Info

Publication number
JPS59108455A
JPS59108455A JP57218945A JP21894582A JPS59108455A JP S59108455 A JPS59108455 A JP S59108455A JP 57218945 A JP57218945 A JP 57218945A JP 21894582 A JP21894582 A JP 21894582A JP S59108455 A JPS59108455 A JP S59108455A
Authority
JP
Japan
Prior art keywords
voltage
signal
circuit
inverse
picture
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.)
Granted
Application number
JP57218945A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0324832B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html
Inventor
Masayuki Arai
政幸 新井
Terumi Ogasawara
輝美 小笠原
Toru Kano
鹿野　徹
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 Precision Co Ltd
Original Assignee
Asahi Seimitsu 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 Asahi Seimitsu KK filed Critical Asahi Seimitsu KK
Priority to JP57218945A priority Critical patent/JPS59108455A/ja
Priority to US06/504,860 priority patent/US4542410A/en
Publication of JPS59108455A publication Critical patent/JPS59108455A/ja
Publication of JPH0324832B2 publication Critical patent/JPH0324832B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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)
  • Exposure Control For Cameras (AREA)
  • Amplifiers (AREA)
JP57218945A 1982-12-14 1982-12-14 Ｃｃｔｖカメラ用自動絞りレンズの自動絞り制御装置 Granted JPS59108455A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP57218945A JPS59108455A (ja) 1982-12-14 1982-12-14 Ｃｃｔｖカメラ用自動絞りレンズの自動絞り制御装置
US06/504,860 US4542410A (en) 1982-12-14 1983-06-16 Automatic diaphragm control device of objective provided with automatic diaphragm for closed circuit television (CCTV) camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57218945A JPS59108455A (ja) 1982-12-14 1982-12-14 Ｃｃｔｖカメラ用自動絞りレンズの自動絞り制御装置

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP60202171A Division JPS61159870A (ja) 1985-09-12 1985-09-12 テレビカメラ用レンズの可変測光型自動絞り制御装置

Publications (2)

Publication Number Publication Date
JPS59108455A true JPS59108455A (ja) 1984-06-22
JPH0324832B2 JPH0324832B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1991-04-04

Family

ID=16727788

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57218945A Granted JPS59108455A (ja) 1982-12-14 1982-12-14 Ｃｃｔｖカメラ用自動絞りレンズの自動絞り制御装置

Country Status (2)

Country Link
US (1) US4542410A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS59108455A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6213170A (ja) * 1985-07-10 1987-01-21 Asahi Seimitsu Kk テレビカメラ用レンズの自動絞り制御装置
JPS6262669A (ja) * 1985-09-12 1987-03-19 Asahi Seimitsu Kk テレビカメラ用レンズの可変測光型自動絞り制御装置
JPS6247274U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1985-09-12 1987-03-23

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6064581A (ja) * 1983-09-19 1985-04-13 Asahi Seimitsu Kk 遠隔制御可能なｃｃｔｖカメラ用レンズの自動絞り制御装置
JP2002142147A (ja) * 2000-11-06 2002-05-17 Asahi Precision Co Ltd Ｃｃｔｖ自動絞りレンズの自動絞り制御回路
TWI472867B (zh) * 2013-07-17 2015-02-11 Vivotek Inc 具光圈偵測功能的網路攝影機及光圈偵測方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3918046A (en) * 1973-02-22 1975-11-04 Xerox Corp Digital to analog converter
US4268866A (en) * 1979-11-09 1981-05-19 Rca Corporation Peak-response controller for average-responding automatic iris
US4300167A (en) * 1980-02-07 1981-11-10 Circon Corporation Automatic iris control system
JPS5821977A (ja) * 1981-08-03 1983-02-09 Asahi Seimitsu Kk Ｃｃｔｖカメラ用自動絞り制御装置
JPS5850867A (ja) * 1981-09-22 1983-03-25 Asahi Seimitsu Kk Ｃｃｔｖカメラ用自動絞り制御装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6213170A (ja) * 1985-07-10 1987-01-21 Asahi Seimitsu Kk テレビカメラ用レンズの自動絞り制御装置
JPS6262669A (ja) * 1985-09-12 1987-03-19 Asahi Seimitsu Kk テレビカメラ用レンズの可変測光型自動絞り制御装置
JPS6247274U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1985-09-12 1987-03-23

Also Published As

Publication number Publication date
US4542410A (en) 1985-09-17
JPH0324832B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1991-04-04

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