JPS6441080A - Optical reader - Google Patents
Optical readerInfo
- Publication number
- JPS6441080A JPS6441080A JP62197038A JP19703887A JPS6441080A JP S6441080 A JPS6441080 A JP S6441080A JP 62197038 A JP62197038 A JP 62197038A JP 19703887 A JP19703887 A JP 19703887A JP S6441080 A JPS6441080 A JP S6441080A
- Authority
- JP
- Japan
- Prior art keywords
- light
- image
- lens
- receiving
- formation 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
- Image Input (AREA)
Abstract
PURPOSE:To prevent an adverse effect due to regular-reflection light by setting an image-formation point on a light-emitting side to a position farther than the image-formation point on a light-receiving side from the lens. CONSTITUTION:An image-formation point A on the light-emitting side, at which a light-emitting element 28 is image-formed by a lens 26 on the light-emitting side, is set to the position farther than an image-formation point B on the light-receiving side, at which a light-receiving element 29 is image-formed by a light-receiving lens 26, from the lens. Consequently, light is irradiated in a defocusing condition for a detecting surface, the proportion of regular-reflection light out of the light, which is reflected from the detecting surface and obtained by the light-receiving lens, is reduced. When a bar code, etc., are read, a possibility to detect the regular-reflection light fro a black bar is largely decreased. Thus, the level of the detecting signal of the black bar and a white bar can be stabilized.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62197038A JPH07113948B2 (en) | 1987-08-05 | 1987-08-05 | Optical reader |
US07/681,633 US5099109A (en) | 1987-08-05 | 1991-04-02 | Optical reader with reduced regular reflection errors |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62197038A JPH07113948B2 (en) | 1987-08-05 | 1987-08-05 | Optical reader |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6441080A true JPS6441080A (en) | 1989-02-13 |
JPH07113948B2 JPH07113948B2 (en) | 1995-12-06 |
Family
ID=16367693
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62197038A Expired - Fee Related JPH07113948B2 (en) | 1987-08-05 | 1987-08-05 | Optical reader |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07113948B2 (en) |
-
1987
- 1987-08-05 JP JP62197038A patent/JPH07113948B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH07113948B2 (en) | 1995-12-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0348182A3 (en) | Uneven-surface data detection apparatus | |
EP0377973A3 (en) | Sensor array and illumination system for a large depth-of-field bar code scanner | |
EP0446364A4 (en) | Laser scanner for bar code reader | |
JPS6416067A (en) | Original detector | |
ATE250782T1 (en) | SCANNER | |
JPS6412216A (en) | Detection of position | |
JPS6441080A (en) | Optical reader | |
JPS575179A (en) | Optical character reader | |
JPS54111858A (en) | Distance detector | |
JPS5631177A (en) | Optical character reader | |
SE8800074D0 (en) | SET AND DEVICE FOR SUKING A FORMAL | |
CA2059807A1 (en) | Scan velocity detector and code reader using the same | |
JPS57114973A (en) | Scanning mechanism for optical reader | |
JPS63198177A (en) | Optical reader | |
JPS57118105A (en) | Detector | |
JPS5536730A (en) | Displaced position detector | |
JPS5651646A (en) | Toner concentration sensor | |
JPS56143085A (en) | Pattern reader | |
JPS5781773A (en) | Picture reader | |
JPS5750071A (en) | Photoelectric card reader | |
JPS561012A (en) | Detection of scanning light beam pass time | |
JPS55110376A (en) | Optical character reader | |
JPS6479892A (en) | Optical character reader | |
JPS56103769A (en) | Optical reader | |
JPS562068A (en) | Optical reader |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |