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JPS55135871A - Original platen lighting device - Google Patents

Original platen lighting device

Info

Publication number
JPS55135871A
JPS55135871A JP4465079A JP4465079A JPS55135871A JP S55135871 A JPS55135871 A JP S55135871A JP 4465079 A JP4465079 A JP 4465079A JP 4465079 A JP4465079 A JP 4465079A JP S55135871 A JPS55135871 A JP S55135871A
Authority
JP
Japan
Prior art keywords
light
lamp
sides
original
way
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
JP4465079A
Other languages
Japanese (ja)
Inventor
Osamu Hoshino
Seiji Sagara
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP4465079A priority Critical patent/JPS55135871A/en
Publication of JPS55135871A publication Critical patent/JPS55135871A/en
Pending legal-status Critical Current

Links

Landscapes

  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)

Abstract

PURPOSE: To provide the device which is small in size and makes effective use of light by making the light emitting part of a stationary lamp dense on the both sides in order to increase the quantity of light near the both sides of the lamp.
CONSTITUTION: Filaments 2 constituting the linear light source in a halogen lamp 1 are made closer in spacings at the both end sides of the lamp 1 and have the light emisson quantity higher at the end parts than at the central part. Light is condensed by way of a condenser lens 3 and the diffusion light in the horizontal direction is effectively utilized as original lighting light by the parallel provided mirrors 4, 5. The lamp 1 is made to the same width as that of the original. In this way, light may be used effectively.
COPYRIGHT: (C)1980,JPO&Japio
JP4465079A 1979-04-12 1979-04-12 Original platen lighting device Pending JPS55135871A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4465079A JPS55135871A (en) 1979-04-12 1979-04-12 Original platen lighting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4465079A JPS55135871A (en) 1979-04-12 1979-04-12 Original platen lighting device

Publications (1)

Publication Number Publication Date
JPS55135871A true JPS55135871A (en) 1980-10-23

Family

ID=12697311

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4465079A Pending JPS55135871A (en) 1979-04-12 1979-04-12 Original platen lighting device

Country Status (1)

Country Link
JP (1) JPS55135871A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04240842A (en) * 1991-01-25 1992-08-28 Canon Inc Illuminator
US5255116A (en) * 1991-02-18 1993-10-19 Canon Kabushiki Kaisha Original scanning apparatus
US5287147A (en) * 1991-01-25 1994-02-15 Canon Kabushiki Kaisha Original scanning apparatus with fixed light source

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04240842A (en) * 1991-01-25 1992-08-28 Canon Inc Illuminator
US5287147A (en) * 1991-01-25 1994-02-15 Canon Kabushiki Kaisha Original scanning apparatus with fixed light source
US5255116A (en) * 1991-02-18 1993-10-19 Canon Kabushiki Kaisha Original scanning apparatus

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