JPS5559584A - Device to read information expressed by unevenness - Google Patents
Device to read information expressed by unevennessInfo
- 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
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
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) |
-
1978
- 1978-10-27 JP JP13233778A patent/JPS5559584A/en active Pending
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