JPS5581337A - Lighting device for exposure in slit exposure type copying machine - Google Patents

Lighting device for exposure in slit exposure type copying machine

Info

Publication number
JPS5581337A
JPS5581337A JP15412178A JP15412178A JPS5581337A JP S5581337 A JPS5581337 A JP S5581337A JP 15412178 A JP15412178 A JP 15412178A JP 15412178 A JP15412178 A JP 15412178A JP S5581337 A JPS5581337 A JP S5581337A
Authority
JP
Japan
Prior art keywords
shading
exposure
slit
shading plate
pieces
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
JP15412178A
Other languages
Japanese (ja)
Inventor
Mitsuki Sagane
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 JP15412178A priority Critical patent/JPS5581337A/en
Publication of JPS5581337A publication Critical patent/JPS5581337A/en
Pending legal-status Critical Current

Links

Landscapes

  • Optical Systems Of Projection Type Copiers (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)

Abstract

PURPOSE: To perform both correction of peripheral dimming and correction of partial illumination unevenness, by using a shading plate and a shading piece set.
CONSTITUTION: In the vicinity of rotary elliptical reflecting mirrors 4, 4 provided in light sources 2, 3, a shading plate 7 of which central part is projecting in curvature in order to dim the intensity of central luminous flux with respect to the peripheral luminous flux is secured and disposed, and shading pieces 8 arranged in sets of several pieces are placed in each rotary ellipitcal reflecting mirror 4 so as to be able to enter and leave the optical line independently. Thus, the peripheral dimming by the optical system is preliminarily corrected by the shading plate 7, and the shading pieces 8 are adjusted in positioning by moving back and force, and by adjusting the width in each position of slit of the slit light beam which is the interval to the shading plate 7, the partial illumination unevenness may be corrected.
COPYRIGHT: (C)1980,JPO&Japio
JP15412178A 1978-12-15 1978-12-15 Lighting device for exposure in slit exposure type copying machine Pending JPS5581337A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15412178A JPS5581337A (en) 1978-12-15 1978-12-15 Lighting device for exposure in slit exposure type copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15412178A JPS5581337A (en) 1978-12-15 1978-12-15 Lighting device for exposure in slit exposure type copying machine

Publications (1)

Publication Number Publication Date
JPS5581337A true JPS5581337A (en) 1980-06-19

Family

ID=15577373

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15412178A Pending JPS5581337A (en) 1978-12-15 1978-12-15 Lighting device for exposure in slit exposure type copying machine

Country Status (1)

Country Link
JP (1) JPS5581337A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57136933U (en) * 1981-02-19 1982-08-26
JPS58166637U (en) * 1982-04-30 1983-11-07 ウシオ電機株式会社 Original illumination device
JPS58195840A (en) * 1982-05-12 1983-11-15 Hitachi Ltd Linear light source device
JPS5917438U (en) * 1982-07-26 1984-02-02 京セラミタ株式会社 Optical device of electrostatic copying machine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57136933U (en) * 1981-02-19 1982-08-26
JPS6213074Y2 (en) * 1981-02-19 1987-04-04
JPS58166637U (en) * 1982-04-30 1983-11-07 ウシオ電機株式会社 Original illumination device
JPS58195840A (en) * 1982-05-12 1983-11-15 Hitachi Ltd Linear light source device
JPH058413B2 (en) * 1982-05-12 1993-02-02 Hitachi Ltd
JPS5917438U (en) * 1982-07-26 1984-02-02 京セラミタ株式会社 Optical device of electrostatic copying machine

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