JPS5541584A - Character read-out method in character generation unit - Google Patents
Character read-out method in character generation unitInfo
- Publication number
- JPS5541584A JPS5541584A JP11566678A JP11566678A JPS5541584A JP S5541584 A JPS5541584 A JP S5541584A JP 11566678 A JP11566678 A JP 11566678A JP 11566678 A JP11566678 A JP 11566678A JP S5541584 A JPS5541584 A JP S5541584A
- Authority
- JP
- Japan
- Prior art keywords
- reproducing
- hologram
- character
- light
- read
- 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
- Holo Graphy (AREA)
Abstract
PURPOSE:To reduce picture distortion without reducing the recording volume of characters by setting selectively a small-area hologram to a reproducing position and causing the reproducing light to be incident onto the hologram from a prescribed direction and reproducing read characters on the center area of the image pickup tube. CONSTITUTION:Laser beam Be which becomes a reproducing light is separated into four beams having an approximately equal light intensity by half mirrors M1, M2 and M3. The transmission light is reflected by reflection mirror M4 and becomes beam B4. These beams B1, B2, B3 and B4 are determined to be incident onto the hologram in the reproducing position with proper directions as reproducing lights. Shutters S1 to S4 are operated according to read characters to irradiate the hologram in the reproducing position with proper reproducing lights.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11566678A JPS5541584A (en) | 1978-09-20 | 1978-09-20 | Character read-out method in character generation unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11566678A JPS5541584A (en) | 1978-09-20 | 1978-09-20 | Character read-out method in character generation unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5541584A true JPS5541584A (en) | 1980-03-24 |
Family
ID=14668282
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11566678A Pending JPS5541584A (en) | 1978-09-20 | 1978-09-20 | Character read-out method in character generation unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5541584A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2522248A (en) * | 2014-01-20 | 2015-07-22 | Promethean Ltd | Interactive system |
-
1978
- 1978-09-20 JP JP11566678A patent/JPS5541584A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2522248A (en) * | 2014-01-20 | 2015-07-22 | Promethean Ltd | Interactive system |
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