JPS5555675A - Pick up unit - Google Patents
Pick up unitInfo
- 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
Links
Landscapes
- 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
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) |
-
1978
- 1978-10-19 JP JP53127853A patent/JPS5823795B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5823795B2 (en) | 1983-05-17 |
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