US5333066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image reading apparatus
Assignee: Dainippon Screen Manufacturing Co Ltd
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Filing: 1993-09-07
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Granted: 1994-07-26
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Expires: 2013-09-07
Abstract
Abstract A scanner scans an original 6 divided into a plurality of regions in a main scanning direction reading image information. The scanner is equipped with light receiving units consisting of a plurality of CCDs arranged in the main scanning direction having a corresponding array of pixels that respond to an image of the original focused on the surface of the array by a plurality of lenses 12 arranged in the main scanning direction. A focal length f of the lens 12 satisfies the following formula, that is, f≧(L.sub.n ×y-n)×P×L.sub.n ×Δ/{n× (1+P×L n )} where L n is the number of lines to be read, y is a length from an optic axis to the end of the region, P is a pitch between the solid-state imaging devices, n is allowable displacement in pixel number on the solid-state imaging devices, and Δ is displacement of the original 6 in the direction of the optic axis OA.
Inventors
- 👤 Takeshi Sugata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:34
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/19; H04N1/191; H04N1/192; H04N1/193; H04N1/1934; H04N1/10; H04N1/1008; H04N1/1935; H04N2201/00; H04N2201/04; H04N2201/0402; H04N2201/0418
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
163 words
An image reading apparatus for reading image information by scanning an original divided into a plurality of regions in a main scanning direction, comprising: an original retainer for retaining said original; a light source for irradiating said original with light; a plurality of solid-state imaging devices corresponding to pixels and arranged in said main scanning direction; and a plurality of lenses arranged in said main scanning direction corresponding to said plurality of regions, for forming an image of the original on said solid-state imaging devices, and with a focal length f of said lens satisfying the following formula, that is, f≧(L.sub.n ×y-n)×P×L.sub.n ×Δ/{n×(1+P×L.sub.n)} where L n is the number of lines to be read, y is a length from an optic axis to the end of said region, P is a pitch between said solid-state imaging devices, n is allowable displacement in pixel number on said solid-state imaging devices, and Δ is displacement of said original in the direction of the optic axis.
Claim 2
Dependent Claim
163 words
An image reading apparatus for reading image information by scanning an original divided into a plurality of regions in a main scanning direction, comprising: an original retainer for retaining said original; a light source for irradiating said original with light; a plurality of solid-state imaging devices corresponding to pixels and arranged in said main scanning direction; and a plurality of lenses arranged in said main scanning direction corresponding to said plurality of regions, for forming an image of the original on said solid-state imaging devices, and with a focal length f of said lens satisfying the following formula, that is, f≧(L.sub.n ×y-n)×P×L.sub.n ×Δ/{n×(1+P×L.sub.n)} where L n is the number of lines to be read, y is a length from an optic axis to the end of said region, P is a pitch between said solid-state imaging devices, n is allowable displacement in pixel number on said solid-state imaging devices, and Δ is displacement of said original in the direction of the optic axis.
Claim 3
Dependent Claim
17 words
An apparatus according to claim 1, wherein adjacent regions of said plurality of regions overlap each other.
Claim 4
Dependent Claim
15 words
An apparatus according to claim 2, wherein said solid-state imaging devices are CCD line sensors.
Claim 5
Dependent Claim
22 words
An apparatus according to claim 3, further comprising a reflecting mirror for refracting light from the original to said plurality of lenses.
Claim 6
Dependent Claim
24 words
An apparatus according to claim 4, wherein said original retainer is movable in a sub-scanning direction which is perpendicular to said main scanning direction.
Claim 7
Dependent Claim
16 words
An apparatus according to claim 5, further comprising a driving mechanism for moving said original retainer.
Claim 8
Dependent Claim
23 words
An apparatus according to claim 6, wherein said original retainer has an upper and a lower glass plate to hold the original therebetween.
Claim 9
Dependent Claim
16 words
An apparatus according to claim 7, wherein said light source is disposed under said original retainer.
Claim 10
Dependent Claim
16 words
An apparatus according to claim 8, wherein said light source is movable in its irradiating direction.
Claim 11
Dependent Claim
26 words
An apparatus according to claim 9, wherein said light source comprises a slitted member having a slit through which said light source exposes a transparent original.
Claim 12
Dependent Claim
25 words
An apparatus according to claim 10, further comprising a second light source for reflection scanning disposed above said original retainer to expose a non-transparent original.
Claim 13
Dependent Claim
25 words
An apparatus according to claim 11, wherein said CCD line sensors read one line of said original by 30000 pixels in the main scanning direction.
Claim 14
Dependent Claim
22 words
An apparatus according to claim 1, further comprising a reflecting mirror for refracting light from the original to said plurality of lenses.
Claim 15
Dependent Claim
23 words
An apparatus according to claim 1, wherein said original retainer is movable in a sub-scanning direction which is perpendicular to said main direction.
Claim 16
Dependent Claim
16 words
An apparatus according to claim 14, further comprising a driving mechanism for moving said original retainer.
Claim 17
Dependent Claim
23 words
An apparatus according to claim 15, wherein said original retainer has an upper and a lower glass plate to hold the original therebetween.
Claim 18
Dependent Claim
16 words
An apparatus according to claim 1, wherein said light source is disposed under said original retainer.
Claim 19
Dependent Claim
16 words
An apparatus according to claim 17, wherein said light source is movable in its irradiating direction.
Claim 20
Dependent Claim
26 words
An apparatus according to claim 18, wherein said light source comprises a slitted member having a slit through which said light source exposes a transparent original.
Claim 21
Dependent Claim
25 words
An apparatus according to claim 1, further comprising a second light source for reflection scanning disposed above said original retainer, to expose a non-transparent original.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-07-25 | 1998-01-24 | 1998-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-25 | 2002-01-24 | 2002-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-25 | 2006-01-24 | 2006-07-26 | $7700.00 | Window Closed / Lapsed |