JPS5546686A - Iris controller of television camera - Google Patents
Iris controller of television cameraInfo
- 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
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.
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)
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 |
-
1978
- 1978-09-29 JP JP12097478A patent/JPS5546686A/en active Pending
Cited By (2)
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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