JPS5559584A - Device to read information expressed by unevenness - Google Patents

Device to read information expressed by unevenness

Info

Publication number
JPS5559584A
JPS5559584A JP13233778A JP13233778A JPS5559584A JP S5559584 A JPS5559584 A JP S5559584A JP 13233778 A JP13233778 A JP 13233778A JP 13233778 A JP13233778 A JP 13233778A JP S5559584 A JPS5559584 A JP S5559584A
Authority
JP
Japan
Prior art keywords
light
reflector
light source
hole
unevenness
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
JP13233778A
Other languages
Japanese (ja)
Inventor
Nobuo Banba
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 JP13233778A priority Critical patent/JPS5559584A/en
Publication of JPS5559584A publication Critical patent/JPS5559584A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain a device which can read out the information expressed by the unevenness with a sufficiently high S/N ratio with use of the light from the ordinary light source.
CONSTITUTION: Light shield plate 3 is fixed at the fixed position of the upper part of shifting surface 2 of information carrier 1 with a fixed space secured. And plate 3 contains small hole 3a to lead in the irradiation light plus small hole 3b functioning an aperture to draw out the reflected light. Light source device 4 provided at the left upper part of plate 3 collimates once the proper beams given from the light source as the parallel luminous flux and then converts into luminous flux L through focusing lens system 4a to then emit it. Reflector 5 is located at the right upper part of hole 3b so that one focus of oval 5a may coincide with the focusing point of flux L and the reflected light from hole 3b may enter the position of the reflector. Photo detector 6 is provided near the other focus of oval 5a to receive the reflection light from reflector 5. Thus the information on carrier 1 can be read out.
COPYRIGHT: (C)1980,JPO&Japio
JP13233778A 1978-10-27 1978-10-27 Device to read information expressed by unevenness Pending JPS5559584A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13233778A JPS5559584A (en) 1978-10-27 1978-10-27 Device to read information expressed by unevenness

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13233778A JPS5559584A (en) 1978-10-27 1978-10-27 Device to read information expressed by unevenness

Publications (1)

Publication Number Publication Date
JPS5559584A true JPS5559584A (en) 1980-05-06

Family

ID=15078963

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13233778A Pending JPS5559584A (en) 1978-10-27 1978-10-27 Device to read information expressed by unevenness

Country Status (1)

Country Link
JP (1) JPS5559584A (en)

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