EP0213539A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Picture reading apparatus
Assignee: Dainippon Screen Manufacturing Co Ltd
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Filing: 1986-08-19
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Granted: —
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Expires: 2006-08-19
Abstract
Abstract The present invention is adapted that, when a picture image of a linear area to be read out of an original picture is projected and focused on a plurality of line sensors, a light flux at the rear stage of a projecting lens is divided into two light fluxes with a plane containing the linear area of the original picture and an optical axis of the lens, and thus the light divid. ing means is disposed at the rear stage of the projecting lens so that each of the divided two light fluxes may be projected and focused on respective line sensors. As a light dividing means, one or two flat mirrors which are disposed so that one end of it or of them may coincide with or approach to the plane which divides the light flux into two fluxes, and a reflecting plane or reflecting planes of which are inclined at desired angle(s) with respect to the optical axis of the projecting lens.
Inventors
- 👤 Yoshiaki Dainippon Screen Mfg. Co. Ltd. Morizumi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 13:48
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/10; G02B27/1066; G02B27/14; G02B27/143; H; H04; H04N; H04N1/00; H04N1/04; H04N1/19; H04N1/191; H04N1/192; H04N1/193; H04N1/1934; H04N1/1935; H04N1/1937; H04N1/195; H04N1/19505; H04N1/1951; H04N1/19521; H04N1/19526; H04N1/19531; H04N1/19536; H04N1/19552; H04N1/19563
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
156 words
A picture reading apparatus for reading out a picture image(s) in a linear area of an original picture to be read out by projecting with a projecting lens said picture image(s) onto the surfaces of a plurality of line sensors which are composed of a number of being aligned photoelectric elements, characterized in that: between said projecting lens and said plurality of line sensors, a plat mirror one end part of which coincides with or approaches to a flat plane containing said linear area and an optical axis of said projecting lens and the reflecting surface of which is inclined to an optical axis of said lens with a desired angle is disposed, a light flux of the rear stage of said projecting lens is divided into a plurality of light beams by said flat mirror so that each of said divided light beams may be projected onto said respective line sensors to focus individually thereon.
Claim 2
Dependent Claim
156 words
A picture reading apparatus for reading out a picture image(s) in a linear area of an original picture to be read out by projecting with a projecting lens said picture image(s) onto the surfaces of a plurality of line sensors which are composed of a number of being aligned photoelectric elements, characterized in that: between said projecting lens and said plurality of line sensors, a plat mirror one end part of which coincides with or approaches to a flat plane containing said linear area and an optical axis of said projecting lens and the reflecting surface of which is inclined to an optical axis of said lens with a desired angle is disposed, a light flux of the rear stage of said projecting lens is divided into a plurality of light beams by said flat mirror so that each of said divided light beams may be projected onto said respective line sensors to focus individually thereon.
Claim 3
Dependent Claim
46 words
A picture reading apparatus according to claim 1, wherein two flat mirrors are oppositely disposed with inversely inclined angles at the both sides of the plane containing said linear area of said original picture to be read out and the optical axis of said projecting lens.
Claim 4
Dependent Claim
32 words
A picture reading apparatus according to claim 1 or 2, wherein said two flat mirrors are oppositely disposed with mutually inversely inclining angles of 45 degree with respect to said linear area.
Claim 5
Dependent Claim
30 words
A picture reading apparatus according to any one of claim 1 to 3, wherein intersecting parts of said two flat mirrors exist on the optical axis of said projecting lens.
Claim 6
Dependent Claim
67 words
A picture reading apparatus according to claim 1, wherein said flat mirror is disposed so that one end of which coincides with or approaches to the plane which contains said linear area and the optical axis of said projecting lens, a part of the light flux is reflected with said flat mirror and the remaining part of the light flux is directly projected onto said line sensors.
Claim 7
Dependent Claim
39 words
A picture reading apparatus according to claim 5, wherein said flat mirror is disposed so that the surface thereof may be in parallel to said linear area and inclined with respect to the optical axis of said projecting mirror.
Claim 8
Dependent Claim
37 words
A picture reading apparatus according to claim 5, wherein said flat mirror is disposed so that the surface thereof is perpendicular with the optical axis of said projecting lens and inclined with respect to said linear area.
Claim 9
Dependent Claim
38 words
A picture reading mirror according to claim 5, wherein said flat mirror is disposed so that the surface of the mirror may incline with respect to both said linear area and the optical axis of said projecting lens.
Claim 10
Dependent Claim
63 words
A picture reading apparatus according to any one of the preceding claims, wherein said plurality of line sensors are separated into two focusing planes basing on said flat mirror, and each of phases of said two focusing surfaces is delayed by each of the corresponding lengths of said respective line sensors so that said linear area may be read out in divided form.
Claim 11
Dependent Claim
26 words
A picture reading apparatus according to claim 9, wherein said plurality of line sensors have same length, and read out said linear area being divided equally.
Claim 12
Dependent Claim
66 words
A picture reading apparatus according to any one of claim 1 to claim 8, wherein each of two line sensors having length capable of reading the whole length of said linear area of the original picture is disposed at each of the focusing planes of the divided light fluxes, and each of said photoelectric elements is disposed relatively slipping off by 1/2 pitch from one another.
References Cited (Backward Citations)
No citation records indexed.
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