JPS5555675A - Pick up unit - Google Patents

Pick up unit

Info

Publication number
JPS5555675A
JPS5555675A JP12785378A JP12785378A JPS5555675A JP S5555675 A JPS5555675 A JP S5555675A JP 12785378 A JP12785378 A JP 12785378A JP 12785378 A JP12785378 A JP 12785378A JP S5555675 A JPS5555675 A JP S5555675A
Authority
JP
Japan
Prior art keywords
circuit
pick
charge
tube
clamp
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
JP12785378A
Other languages
Japanese (ja)
Other versions
JPS5823795B2 (en
Inventor
Juko Sugaya
Isao Hoshino
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.)
National Institute of Advanced Industrial Science and Technology AIST
Original Assignee
Agency of Industrial Science and Technology
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 Agency of Industrial Science and Technology filed Critical Agency of Industrial Science and Technology
Priority to JP53127853A priority Critical patent/JPS5823795B2/en
Publication of JPS5555675A publication Critical patent/JPS5555675A/en
Publication of JPS5823795B2 publication Critical patent/JPS5823795B2/en
Expired legal-status Critical Current

Links

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  • Transforming Light Signals Into Electric Signals (AREA)

Abstract

PURPOSE: To automatically correct the luminance change with the change in the pick up interval, by producing the current corresponding to the charge not charged for the capacitance of photo conductive surface with the charging and discharge circuit provided separately as the target and controlling the clamp potential of the video circuit.
CONSTITUTION: To the lamp drive circuit 7 of the pick up unit having the pick up tube 1, deflection coil 2, face plate 3, lens 4 and lamp 5 for residual image erase, the charge and discharge circuit 8 almost the same time constant as the target charging or discharging the current corresponding to the charge not charged up for the capacitance of photo conductive surface of the pick up tube 1 is connected. The current (voltage) produced from the circuit 8 is held at the sample hold circuit 9 with the sample pulse from the control circuit 11 and the clamp level of the clamp circuit 10 is fixed with the output of the circuit 9. Further, when the image on the target surface of the pick up tube 1 is fed to the circuit 10, the pedestal level is controlled with the output of the circuit 9 and the luminance change can automatically be corrected.
COPYRIGHT: (C)1980,JPO&Japio
JP53127853A 1978-10-19 1978-10-19 Imaging device Expired JPS5823795B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53127853A JPS5823795B2 (en) 1978-10-19 1978-10-19 Imaging device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53127853A JPS5823795B2 (en) 1978-10-19 1978-10-19 Imaging device

Publications (2)

Publication Number Publication Date
JPS5555675A true JPS5555675A (en) 1980-04-23
JPS5823795B2 JPS5823795B2 (en) 1983-05-17

Family

ID=14970279

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53127853A Expired JPS5823795B2 (en) 1978-10-19 1978-10-19 Imaging device

Country Status (1)

Country Link
JP (1) JPS5823795B2 (en)

Also Published As

Publication number Publication date
JPS5823795B2 (en) 1983-05-17

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