JPS5581319A - Optical information reader - Google Patents

Optical information reader

Info

Publication number
JPS5581319A
JPS5581319A JP15514078A JP15514078A JPS5581319A JP S5581319 A JPS5581319 A JP S5581319A JP 15514078 A JP15514078 A JP 15514078A JP 15514078 A JP15514078 A JP 15514078A JP S5581319 A JPS5581319 A JP S5581319A
Authority
JP
Japan
Prior art keywords
hologram
scanning
thru
constitution
reflected light
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
JP15514078A
Other languages
Japanese (ja)
Other versions
JPS6321169B2 (en
Inventor
Hiroyuki Ikeda
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP15514078A priority Critical patent/JPS5581319A/en
Publication of JPS5581319A publication Critical patent/JPS5581319A/en
Publication of JPS6321169B2 publication Critical patent/JPS6321169B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To make reading accurate by specifying the constitution hologram substrates.
CONSTITUTION: The X-direction-scanning hologram regions X1' thru X9' of a read window region 5 of a fan shape mutually having an equal center angle α as well as the Y-direction-scanning hologram regions Y1' thru Y3' of the read window region 5 of a fan shape having the center angle α and forming holograms over the 1st and 3rd entire surfaces and strip-form holograms over the 2nd entire surface are provided on a hologram disc 9. The reflected light from the information carrier having been photo scanned through the fan-shaped aperture 11 which is 2α in the central angle of an optical mask 10 is led to a photo detector 6. As a result of this, the condensing areas of the reflected light from the information carrier become constant with all the scanning lines, the area of the aperture 11 is reduced, the incident quantity of external light is reduced, the information signal of superior S/N is obtained and the intended object is achieved.
COPYRIGHT: (C)1980,JPO&Japio
JP15514078A 1978-12-14 1978-12-14 Optical information reader Granted JPS5581319A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15514078A JPS5581319A (en) 1978-12-14 1978-12-14 Optical information reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15514078A JPS5581319A (en) 1978-12-14 1978-12-14 Optical information reader

Publications (2)

Publication Number Publication Date
JPS5581319A true JPS5581319A (en) 1980-06-19
JPS6321169B2 JPS6321169B2 (en) 1988-05-06

Family

ID=15599415

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15514078A Granted JPS5581319A (en) 1978-12-14 1978-12-14 Optical information reader

Country Status (1)

Country Link
JP (1) JPS5581319A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57204022A (en) * 1981-06-08 1982-12-14 Ibm Optical scanner

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH075988U (en) * 1993-06-23 1995-01-27 株式会社東郷製作所 Slip joint for seat belt

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57204022A (en) * 1981-06-08 1982-12-14 Ibm Optical scanner
JPH0363048B2 (en) * 1981-06-08 1991-09-27 Intaanashonaru Bijinesu Mashiinzu Corp

Also Published As

Publication number Publication date
JPS6321169B2 (en) 1988-05-06

Similar Documents

Publication Publication Date Title
JPS52109954A (en) Optical signal reader
GB1560976A (en) Method for the optical reading of an information support and optical reading device employing said reading method
JPS54143014A (en) Reader
JPS57173256A (en) Image sensor
JPS5587970A (en) Radiation picture information reader
JPS5581319A (en) Optical information reader
JPS57132234A (en) Spatulate light pen
GB2007899A (en) Platen for optical fingerpress image processing
EP0168007A3 (en) Direct finger reading
JPS5634154A (en) Optical disc for write-in
JPS5679368A (en) Pen type bar-code reader
JPS5231622A (en) Optical information reader
JPS5444552A (en) Information reader
JPS5581382A (en) Production of optical reading hologram
JPS56153484A (en) Preprocessing device for pattern recognition
JPS5922992B2 (en) information reading device
JPS59121974A (en) Close adhesion type image sensor
JPS55163942A (en) Reader for original
JPS5536730A (en) Displaced position detector
JPS5245927A (en) Enlarger for color photography
JPS57124485A (en) Solid image pickup element
JPS5570942A (en) Tracking error detector
JPS5727246A (en) Information mark indicator
SU559449A1 (en) Optical sweep
JPS57135576A (en) Image reader