JPS5375773A - Automatic focussing unit - Google Patents
Automatic focussing unitInfo
- Publication number
- JPS5375773A JPS5375773A JP15071976A JP15071976A JPS5375773A JP S5375773 A JPS5375773 A JP S5375773A JP 15071976 A JP15071976 A JP 15071976A JP 15071976 A JP15071976 A JP 15071976A JP S5375773 A JPS5375773 A JP S5375773A
- Authority
- JP
- Japan
- Prior art keywords
- automatic focussing
- focussing unit
- signal
- focussing
- unit
- 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
Landscapes
- Automatic Focus Adjustment (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
- Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
Abstract
PURPOSE: To enable automatic focussing, by picking up the differential signal of video signal, and by regarding the signal as perfect for focussing when it reaches a maximum corresponding to the steep change of chroma.
COPYRIGHT: (C)1978,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15071976A JPS5375773A (en) | 1976-12-17 | 1976-12-17 | Automatic focussing unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15071976A JPS5375773A (en) | 1976-12-17 | 1976-12-17 | Automatic focussing unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5375773A true JPS5375773A (en) | 1978-07-05 |
Family
ID=15502901
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15071976A Pending JPS5375773A (en) | 1976-12-17 | 1976-12-17 | Automatic focussing unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5375773A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5555529A (en) * | 1978-10-20 | 1980-04-23 | Hitachi Ltd | Method of positioning wafer |
JPS56500196A (en) * | 1979-02-14 | 1981-02-19 | ||
JPS59121932A (en) * | 1982-12-28 | 1984-07-14 | Fujitsu Ltd | Automatic focusing control unit |
JPS6063929A (en) * | 1984-07-04 | 1985-04-12 | Hitachi Ltd | Optical processor for plate object |
-
1976
- 1976-12-17 JP JP15071976A patent/JPS5375773A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5555529A (en) * | 1978-10-20 | 1980-04-23 | Hitachi Ltd | Method of positioning wafer |
JPS6259457B2 (en) * | 1978-10-20 | 1987-12-11 | Hitachi Ltd | |
JPS56500196A (en) * | 1979-02-14 | 1981-02-19 | ||
JPS59121932A (en) * | 1982-12-28 | 1984-07-14 | Fujitsu Ltd | Automatic focusing control unit |
JPS6355859B2 (en) * | 1982-12-28 | 1988-11-04 | Fujitsu Ltd | |
JPS6063929A (en) * | 1984-07-04 | 1985-04-12 | Hitachi Ltd | Optical processor for plate object |
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