JPS5765960A - Linear illumination light source - Google Patents

Linear illumination light source

Info

Publication number
JPS5765960A
JPS5765960A JP55141951A JP14195180A JPS5765960A JP S5765960 A JPS5765960 A JP S5765960A JP 55141951 A JP55141951 A JP 55141951A JP 14195180 A JP14195180 A JP 14195180A JP S5765960 A JPS5765960 A JP S5765960A
Authority
JP
Japan
Prior art keywords
light
light source
light guide
face
film
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.)
Granted
Application number
JP55141951A
Other languages
Japanese (ja)
Other versions
JPS6041505B2 (en
Inventor
Hisao Oota
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.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP55141951A priority Critical patent/JPS6041505B2/en
Publication of JPS5765960A publication Critical patent/JPS5765960A/en
Publication of JPS6041505B2 publication Critical patent/JPS6041505B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52—Details
    • G03B27/54—Lamp housings; Illuminating means
    • G03B27/542—Lamp housings; Illuminating means for copying cameras, reflex exposure lighting

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)

Abstract

PURPOSE:To obtain a small-size linear illumination light source having a high intensity of illumination, by using a hot-cathode fluorescent tube as a light source and by leading the light of this light source by a thin light guide constituting a part of a vessel. CONSTITUTION:A vessel 11 which is formed slenderly in the longitudinal direction of the paper surface and has the inside held in vacuum consists of a substrate 11a, side plates 11b, and a light guide 11c where the inside is transparent and the surface except both end faces consists of a light reflecting film 10. Further, a hot- cathode fluorescent tube consists of an anode electrode 6, a fluorescent film 7, a grid electrode 8, and a filament 9. The light emitted from the fluorescent film 7 is led to the upper end face of the light guide 11c directly or while being reflected by the light reflecting film 10, and therefore, the light flux on the upper end face is approximately equivalent to that on the luminous face of the fluorescent film 7. Since the light guide can be several mm. thick, a small-size and high-efficiency linear light source without degradation of resolution and lowering of contrast is obtained for illuminating originals of a fascimile or the like.
JP55141951A 1980-10-13 1980-10-13 linear illumination light source Expired JPS6041505B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55141951A JPS6041505B2 (en) 1980-10-13 1980-10-13 linear illumination light source

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55141951A JPS6041505B2 (en) 1980-10-13 1980-10-13 linear illumination light source

Publications (2)

Publication Number Publication Date
JPS5765960A true JPS5765960A (en) 1982-04-21
JPS6041505B2 JPS6041505B2 (en) 1985-09-17

Family

ID=15303916

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55141951A Expired JPS6041505B2 (en) 1980-10-13 1980-10-13 linear illumination light source

Country Status (1)

Country Link
JP (1) JPS6041505B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59178444A (en) * 1983-03-30 1984-10-09 Ricoh Co Ltd Illuminating device
US4908717A (en) * 1988-06-04 1990-03-13 Nippon Seimitsu Kogyo Kabushiki Kaisha Image scanner using a rod-type light source

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59178444A (en) * 1983-03-30 1984-10-09 Ricoh Co Ltd Illuminating device
US4908717A (en) * 1988-06-04 1990-03-13 Nippon Seimitsu Kogyo Kabushiki Kaisha Image scanner using a rod-type light source

Also Published As

Publication number Publication date
JPS6041505B2 (en) 1985-09-17

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