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JPS5397852A - Image reading device - Google Patents

Image reading device

Info

Publication number
JPS5397852A
JPS5397852A JP14351576A JP14351576A JPS5397852A JP S5397852 A JPS5397852 A JP S5397852A JP 14351576 A JP14351576 A JP 14351576A JP 14351576 A JP14351576 A JP 14351576A JP S5397852 A JPS5397852 A JP S5397852A
Authority
JP
Japan
Prior art keywords
image reading
reading device
photodetector
brightness
resolution
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
JP14351576A
Other languages
Japanese (ja)
Inventor
Michiharu Abe
Hiroyoshi Funato
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP14351576A priority Critical patent/JPS5397852A/en
Priority to US05/837,493 priority patent/US4149269A/en
Publication of JPS5397852A publication Critical patent/JPS5397852A/en
Pending legal-status Critical Current

Links

Landscapes

  • Holo Graphy (AREA)

Abstract

PURPOSE: To substantially improve the resolution by forming additionally a hologram plate with a special pattern as a reference of brightness to effect the detection with the use of another photodetector so that an output signal may be taken out of an image scanning photodetector.
COPYRIGHT: (C)1978,JPO&Japio
JP14351576A 1976-09-29 1976-12-01 Image reading device Pending JPS5397852A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP14351576A JPS5397852A (en) 1976-12-01 1976-12-01 Image reading device
US05/837,493 US4149269A (en) 1976-09-29 1977-09-28 Holographic reading apparatus with an area identification and density reference scan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14351576A JPS5397852A (en) 1976-12-01 1976-12-01 Image reading device

Publications (1)

Publication Number Publication Date
JPS5397852A true JPS5397852A (en) 1978-08-26

Family

ID=15340524

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14351576A Pending JPS5397852A (en) 1976-09-29 1976-12-01 Image reading device

Country Status (1)

Country Link
JP (1) JPS5397852A (en)

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