JPS5541584A - Character read-out method in character generation unit - Google Patents

Character read-out method in character generation unit

Info

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
Application number
JP11566678A
Other languages
Japanese (ja)
Inventor
Etsuko Yoshikawa
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP11566678A priority Critical patent/JPS5541584A/en
Publication of JPS5541584A publication Critical patent/JPS5541584A/en
Pending legal-status Critical Current

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.
JP11566678A 1978-09-20 1978-09-20 Character read-out method in character generation unit Pending JPS5541584A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2522248A (en) * 2014-01-20 2015-07-22 Promethean Ltd Interactive system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2522248A (en) * 2014-01-20 2015-07-22 Promethean Ltd Interactive system

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