JPS5617481A - Optical reading method for braille - Google Patents
Optical reading method for brailleInfo
- Publication number
- JPS5617481A JPS5617481A JP9322479A JP9322479A JPS5617481A JP S5617481 A JPS5617481 A JP S5617481A JP 9322479 A JP9322479 A JP 9322479A JP 9322479 A JP9322479 A JP 9322479A JP S5617481 A JPS5617481 A JP S5617481A
- Authority
- JP
- Japan
- Prior art keywords
- spot
- braille
- light
- convex
- point
- 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.)
- Granted
Links
Landscapes
- Character Input (AREA)
Abstract
PURPOSE: To read convex braille points accurately by making use of the position shift of a spot generated when an uneven surface body is irradiated with a spot of slanting light.
CONSTITUTION: Light from light source 5 is reduced by slit 6 and strikes braille paper 4 slantingly and a read system or the braille papter is moved to scan braille paper 4 by the light. Then, when the circumference of the peak of convex point 7 of a braille point is irradiated with spot 50 of light, bright point 50 agrees with detection position 90 of photodetector 9, detecting convex point 7. When spot 50 of light scans where no convex part resides, the position of spot 50 disagrees with detection position 90, so that bright point 50 will not be detected. Further, even if scribbling and spot reside, they are never detected. Additionally, concave part 71 is not detected in the same way. Thus, only convex parts become bright and can clearly be discriminated from other parts.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54093224A JPS5920155B2 (en) | 1979-07-24 | 1979-07-24 | Braille optical reading method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54093224A JPS5920155B2 (en) | 1979-07-24 | 1979-07-24 | Braille optical reading method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5617481A true JPS5617481A (en) | 1981-02-19 |
JPS5920155B2 JPS5920155B2 (en) | 1984-05-11 |
Family
ID=14076573
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54093224A Expired JPS5920155B2 (en) | 1979-07-24 | 1979-07-24 | Braille optical reading method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5920155B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01169687A (en) * | 1987-12-25 | 1989-07-04 | Rinku:Kk | Embossed character reader |
JPH06139393A (en) * | 1992-10-30 | 1994-05-20 | Opt Kk | Projecter and recessed code reader |
-
1979
- 1979-07-24 JP JP54093224A patent/JPS5920155B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01169687A (en) * | 1987-12-25 | 1989-07-04 | Rinku:Kk | Embossed character reader |
JPH06139393A (en) * | 1992-10-30 | 1994-05-20 | Opt Kk | Projecter and recessed code reader |
Also Published As
Publication number | Publication date |
---|---|
JPS5920155B2 (en) | 1984-05-11 |
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