JPS5546686A - Iris controller of television camera - Google Patents

Iris controller of television camera

Info

Publication number
JPS5546686A
JPS5546686A JP12097478A JP12097478A JPS5546686A JP S5546686 A JPS5546686 A JP S5546686A JP 12097478 A JP12097478 A JP 12097478A JP 12097478 A JP12097478 A JP 12097478A JP S5546686 A JPS5546686 A JP S5546686A
Authority
JP
Japan
Prior art keywords
switch
iris
capacitor
diode
direct
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
JP12097478A
Other languages
Japanese (ja)
Inventor
Sadami Nakajima
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.)
Ikegami Tsushinki Co Ltd
Original Assignee
Ikegami Tsushinki 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 Ikegami Tsushinki Co Ltd filed Critical Ikegami Tsushinki Co Ltd
Priority to JP12097478A priority Critical patent/JPS5546686A/en
Publication of JPS5546686A publication Critical patent/JPS5546686A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
    • H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
    • H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
    • H02P7/29—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)

Abstract

PURPOSE:To prevent effectively the deterioration and damage of a pickup tube by constituting a TV camera so that when power is OFF with an iris mechanism open, the iris mechabism will be stopped down to its end. CONSTITUTION:Through power switch 23, TV camera unit 20 is applied with a direct-current voltage, and lens unit 21 with the direct-current voltage by way of switch 23 and relay switch 24, thereby controlling an iris mechanism by a signal from iris control circuit 7. To the output side of this switch 23, diode 25, capacitor 26, resistance 27, and diode 28 are connected in series and when switch 23 is ON, capacitor 26 is charged by a provided charging circuit. When the charging circuit charges it for a fixed time with switch 23 OFF, switch 24 is driven by transistor Tr30 and relay 37 to apply a voltage across unit 21 by Trs35 and 39 and batteries 31 and 32, thereby stopping automatically down the iris mechanism to its end.
JP12097478A 1978-09-29 1978-09-29 Iris controller of television camera Pending JPS5546686A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12097478A JPS5546686A (en) 1978-09-29 1978-09-29 Iris controller of television camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12097478A JPS5546686A (en) 1978-09-29 1978-09-29 Iris controller of television camera

Publications (1)

Publication Number Publication Date
JPS5546686A true JPS5546686A (en) 1980-04-01

Family

ID=14799634

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12097478A Pending JPS5546686A (en) 1978-09-29 1978-09-29 Iris controller of television camera

Country Status (1)

Country Link
JP (1) JPS5546686A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4410915A (en) * 1981-06-17 1983-10-18 Ikegami Tsushinki Co. Ltd. Apparatus for protecting an image pickup tube in a television camera
JPH01139684U (en) * 1988-03-17 1989-09-25

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4410915A (en) * 1981-06-17 1983-10-18 Ikegami Tsushinki Co. Ltd. Apparatus for protecting an image pickup tube in a television camera
JPH01139684U (en) * 1988-03-17 1989-09-25

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