JPS5927377A - Optical information reader - Google Patents

Optical information reader

Info

Publication number
JPS5927377A
JPS5927377A JP13613282A JP13613282A JPS5927377A JP S5927377 A JPS5927377 A JP S5927377A JP 13613282 A JP13613282 A JP 13613282A JP 13613282 A JP13613282 A JP 13613282A JP S5927377 A JPS5927377 A JP S5927377A
Authority
JP
Japan
Prior art keywords
emitting diodes
light emitting
image
bar
optical information
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
JP13613282A
Inventor
Masahiro Hara
Atsutoshi Okamoto
Tadao Oshima
Toshitaka Sakai
Hiromitsu Takai
Hiroshi Yamamoto
Original Assignee
Nippon Denso 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 Nippon Denso Co Ltd filed Critical Nippon Denso Co Ltd
Priority to JP13613282A priority Critical patent/JPS5927377A/en
Publication of JPS5927377A publication Critical patent/JPS5927377A/en
Application status is Pending legal-status Critical

Links

Abstract

PURPOSE: To prevent a partial read failure, by making the circumferential part higher than the center part of optical information with respect to photoelectric conversion seusitivity.
CONSTITUTION: Red light emitting diodes 1, 2 of a portable reader are made to emit light to a bar-code label 4 printed by a heat sensible printer, the light is irradiated through a lens 3, and an image is formed on an image sensor 9 on which a photo-element is arrayed. Intensity of illumination of light emission of two red light emitting diodes of the outside is made higher than that of light emitting diodes 2, 2 of the inside, therefore, a bar-code video forming an image on an image sensor 9 has equalized brightness extending over the whole area, and the level of an electric signal is stabilized.
COPYRIGHT: (C)1984,JPO&Japio
JP13613282A 1982-08-03 1982-08-03 Optical information reader Pending JPS5927377A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13613282A JPS5927377A (en) 1982-08-03 1982-08-03 Optical information reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13613282A JPS5927377A (en) 1982-08-03 1982-08-03 Optical information reader

Publications (1)

Publication Number Publication Date
JPS5927377A true JPS5927377A (en) 1984-02-13

Family

ID=15168050

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13613282A Pending JPS5927377A (en) 1982-08-03 1982-08-03 Optical information reader

Country Status (1)

Country Link
JP (1) JPS5927377A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5418357A (en) * 1992-06-22 1995-05-23 Matsushita Electric Industrial Co., Ltd. Bar-code reader permitting selective use of a whole or a part of an image sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5418357A (en) * 1992-06-22 1995-05-23 Matsushita Electric Industrial Co., Ltd. Bar-code reader permitting selective use of a whole or a part of an image sensor

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