JPS5581336A - Slit lighting device in copying machine - Google Patents

Slit lighting device in copying machine

Info

Publication number
JPS5581336A
JPS5581336A JP9616479A JP9616479A JPS5581336A JP S5581336 A JPS5581336 A JP S5581336A JP 9616479 A JP9616479 A JP 9616479A JP 9616479 A JP9616479 A JP 9616479A JP S5581336 A JPS5581336 A JP S5581336A
Authority
JP
Japan
Prior art keywords
reflecting mirror
focus
slit
width
main axis
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
JP9616479A
Other languages
Japanese (ja)
Inventor
Nobuo Sakuma
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 JP9616479A priority Critical patent/JPS5581336A/en
Publication of JPS5581336A publication Critical patent/JPS5581336A/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 improve the lighting efficiency and achieve uniformity of illumination distribution, by using three reflecting mirrors.
CONSTITUTION: An upper reflecting mirror 11a shaped in tubular elliptical surface, divided into two parts by the main axis, and having first and second focuses Ia, Ib on the main axis, and a lower reflecting mirror 11b having first focus IIa and second focus IIb coinciding with the first focus Ia on the main axis are disposed in obliquely lower positions in a slit having a width a of a stage glass 10, and a third reflecting mirror 12 is provided between the upper reflecting mirror 11a and the second focus Ib thereof. Thus setting up, the light from a light source 13 reflected by the upper reflecting mirror 11a is further reflected by the third reflecting mirror 12 and illuminates the slit having width a in the midway of running towards the second focus Ib, while the light from the light source 13 reflected by the lower reflecting mirror 11b illuminates the slit of width a direclty in the midway of running toward the second focus IIb. Therefore, the slit is illuminated at a relatively small incident angle from the obliquely lower part from the opposite sides, so that the intended purpose may be attained.
COPYRIGHT: (C)1980,JPO&Japio
JP9616479A 1979-07-30 1979-07-30 Slit lighting device in copying machine Pending JPS5581336A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9616479A JPS5581336A (en) 1979-07-30 1979-07-30 Slit lighting device in copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9616479A JPS5581336A (en) 1979-07-30 1979-07-30 Slit lighting device in copying machine

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP49089974A Division JPS5123724A (en) 1974-08-06 1974-08-06 Fukushakitoniokeru suritsutoshomeisochi

Publications (1)

Publication Number Publication Date
JPS5581336A true JPS5581336A (en) 1980-06-19

Family

ID=14157692

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9616479A Pending JPS5581336A (en) 1979-07-30 1979-07-30 Slit lighting device in copying machine

Country Status (1)

Country Link
JP (1) JPS5581336A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0316143U (en) * 1989-06-30 1991-02-18

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0316143U (en) * 1989-06-30 1991-02-18

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