JPS6441080A - Optical reader - Google Patents

Optical reader

Info

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
Application number
JP62197038A
Other languages
Japanese (ja)
Other versions
JPH07113948B2 (en
Inventor
Hiroshi Ishikawa
Ichiro Morishita
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.)
Alps Alpine Co Ltd
Original Assignee
Alps Electric 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 Alps Electric Co Ltd filed Critical Alps Electric Co Ltd
Priority to JP62197038A priority Critical patent/JPH07113948B2/en
Publication of JPS6441080A publication Critical patent/JPS6441080A/en
Priority to US07/681,633 priority patent/US5099109A/en
Publication of JPH07113948B2 publication Critical patent/JPH07113948B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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.
JP62197038A 1987-08-05 1987-08-05 Optical reader Expired - Fee Related JPH07113948B2 (en)

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)

Also Published As

Publication number Publication date
JPH07113948B2 (en) 1995-12-06

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees