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EP0299704A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

A contact-type image sensor

Assignee: Sharp Corp
•
Filing: 1988-07-11
•
Granted: —
•
Expires: 2008-07-11
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Abstract

Abstract A contact-type image sensor comprising a light source (2) that illuminates a manuscript (1) to be read; photodetectors (8) that convert the light reflected by the manuscript into an electrical signal; a substrate (6) that is disposed between the photodetectors (8) and the manuscript (1); an optical fibre array (3) constituted by a bundle of optical fibres (3a) that are buried in the substrate (6), the optical fibre array introducing the reflected light from the manuscript into the light-receiving surfaces of the photodetectors; and a light-absorbing substance (5) that is disposed on the outer surface of each of the optical fibres, the light-­absorbing substance being disposed on the outer surface of each of the optical fibres, except for the region with a given length (ℓ) from the end of the optical fibre array that faces the manuscript.

Inventors

  • 👤 Atsushi Yoshinouchi
  • 👤 Masataka Itoh
  • 👤 Shuhei Tsuchimoto
  • 👤 Keiji Tarui
  • 👤 Satoshi Nishigaki

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 05:59
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/024; H04N1/028; H04N1/03; H04N1/031; H04N1/0311; H04N1/0312; H04N1/0315; H04N1/0316

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 143 words
A contact-type image sensor comprising a light source (2) for illuminating a manuscript (1) to be read; photodetectors (8) that convert the light reflected by the manuscript into an electrical signal; a substrate (6) that is disposed between said photodetectors (8) and said manuscript; an optical fibre array (3) that is constituted by a bundle of optical fibres (3a) that are buried in said substrate (6), said optical fibre array introducing said reflected light from said manuscript into the light-receiving surfaces of said photo­detectors; and a light-absorbing substance (5) that is disposed on the outer surface of each of said optical fibres (3a), characterised in that said light-absorbing substance (5) is disposed on the outer surface of each of the optical fibres, except for the region with a given length (ℓ) from the end of said optical fibre array that faces said manuscript.
Claim 2
Dependent Claim 143 words
A contact-type image sensor comprising a light source (2) for illuminating a manuscript (1) to be read; photodetectors (8) that convert the light reflected by the manuscript into an electrical signal; a substrate (6) that is disposed between said photodetectors (8) and said manuscript; an optical fibre array (3) that is constituted by a bundle of optical fibres (3a) that are buried in said substrate (6), said optical fibre array introducing said reflected light from said manuscript into the light-receiving surfaces of said photo­detectors; and a light-absorbing substance (5) that is disposed on the outer surface of each of said optical fibres (3a), characterised in that said light-absorbing substance (5) is disposed on the outer surface of each of the optical fibres, except for the region with a given length (ℓ) from the end of said optical fibre array that faces said manuscript.
Claim 3
Dependent Claim 26 words
A contact-type image sensor according to claim 1, wherein the light-receiving surfaces of said photodetectors closely face the light-emitting face of the bundle of optical fibres.

References Cited (Backward Citations)

DE1228926B Cited
US3183815A Cited
DE3206620A1 Cited
US4598975A Cited
GB2159365A Cited

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