JPS55100539A - Original image reading system - Google Patents

Original image reading system

Info

Publication number
JPS55100539A
JPS55100539A JP855379A JP855379A JPS55100539A JP S55100539 A JPS55100539 A JP S55100539A JP 855379 A JP855379 A JP 855379A JP 855379 A JP855379 A JP 855379A JP S55100539 A JPS55100539 A JP S55100539A
Authority
JP
Japan
Prior art keywords
contact glass
light
photochromic
photochromic layer
lighting
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
JP855379A
Other languages
Japanese (ja)
Inventor
Fumio Asano
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 JP855379A priority Critical patent/JPS55100539A/en
Publication of JPS55100539A publication Critical patent/JPS55100539A/en
Pending legal-status Critical Current

Links

Landscapes

  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Optical Filters (AREA)

Abstract

PURPOSE: To prevent the external leakage of lamp light for reading without using any auxiliary means by applying photochromic treatment to contact glass surface.
CONSTITUTION: Photochromic material which can realize reversible two states of non-coloring and coloring through light radiation of the wavelengths having two mutually different spectra is coated over the entire surface on top of a contact glass 2 to form a photochromic layer 3. A control box 4 is provided on the side of the contact glass 2. Then, when the original 9 is set in the specified position on the contact glass 2 surface according to its size and a control switch is pushed after this, then a lighting lamp 5 goes on and at the same time a driving part 8 operates to move a slit plate 7 which causes lighting light to radiate the entire surface of the photochromic layer 3 at a certain spectrum and causes the exposed portions thereof to form a color. This prevents the external leakage of lamp light for reading. After the copying is finished, the lighting light is radiated at a different spectrum, and the photochromic layer 3 restores a colorless state.
COPYRIGHT: (C)1980,JPO&Japio
JP855379A 1979-01-26 1979-01-26 Original image reading system Pending JPS55100539A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP855379A JPS55100539A (en) 1979-01-26 1979-01-26 Original image reading system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP855379A JPS55100539A (en) 1979-01-26 1979-01-26 Original image reading system

Publications (1)

Publication Number Publication Date
JPS55100539A true JPS55100539A (en) 1980-07-31

Family

ID=11696303

Family Applications (1)

Application Number Title Priority Date Filing Date
JP855379A Pending JPS55100539A (en) 1979-01-26 1979-01-26 Original image reading system

Country Status (1)

Country Link
JP (1) JPS55100539A (en)

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