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.
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.