JPS55116170A - Lighting unit for photo information input device - Google Patents

Lighting unit for photo information input device

Info

Publication number
JPS55116170A
JPS55116170A JP2374479A JP2374479A JPS55116170A JP S55116170 A JPS55116170 A JP S55116170A JP 2374479 A JP2374479 A JP 2374479A JP 2374479 A JP2374479 A JP 2374479A JP S55116170 A JPS55116170 A JP S55116170A
Authority
JP
Japan
Prior art keywords
shaped light
emitting elements
light emitting
plate
lighted
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
JP2374479A
Other languages
Japanese (ja)
Inventor
Tadatami Mori
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 JP2374479A priority Critical patent/JPS55116170A/en
Publication of JPS55116170A publication Critical patent/JPS55116170A/en
Pending legal-status Critical Current

Links

Landscapes

  • Character Input (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

PURPOSE: To light effectively only a document surface as an object to be lighted, by constituting a horn-shaped light source by combining plate-shaped light emitting elements in three dimensions.
CONSTITUTION: In front of an optical system composed of scanning-type photosensor 1 and lens 2, a couple of the 1st plate-shaped light emitting elements 6a are arranged at an angle nearly equal to scanning angle θ1 of the optical system, and another couple of the 2nd plate-shaped light emitting elements 6b are also arranged at an angle nearly equal to visual-field angle θ2 of the optical system, thereby constituting a horn-shaped lighting source. Therefore, the beam density of each part of plate-shaped light emitting elements 6a and 6b is even. The radiation of light is put into effect as to only internal surfaces, so that a document surface only as a lighted object can be lighted effectively.
COPYRIGHT: (C)1980,JPO&Japio
JP2374479A 1979-02-28 1979-02-28 Lighting unit for photo information input device Pending JPS55116170A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2374479A JPS55116170A (en) 1979-02-28 1979-02-28 Lighting unit for photo information input device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2374479A JPS55116170A (en) 1979-02-28 1979-02-28 Lighting unit for photo information input device

Publications (1)

Publication Number Publication Date
JPS55116170A true JPS55116170A (en) 1980-09-06

Family

ID=12118809

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2374479A Pending JPS55116170A (en) 1979-02-28 1979-02-28 Lighting unit for photo information input device

Country Status (1)

Country Link
JP (1) JPS55116170A (en)

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