Patent JPS59103902A successfully refreshed from Google Patents.
US4723154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image reading apparatus
Assignee: Canon Inc
•
Filing: 1987-01-21
•
Granted: 1988-02-02
•
Expires: 2007-01-21
Abstract
Abstract When directing a slit-like image information light to an imaging lens through a condensing lens, the refractive power of the condensing lens is made to differ between the lengthwise direction and the slit width direction of the slit light beam, whereby the light is effectively received without the read image being deteriorated. Also, when a convergent light transmitting member array is used as the imaging lens, the refractive power of the condensing lens is made to differ between the lengthwise direction of the array and a direction orthogonal to the lengthwise direction of the array, whereby the light is effectively received without the read image being deteriorated.
Inventors
- 👤 Takeshi Kuwayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:17
CPC Classifications
G; G02; G02B; G02B3/00; G02B3/02; G02B3/08; G02B19/00; G02B19/0004; G02B19/0009; G02B19/0014; G02B19/0033; G02B19/0047; G03; G03G; G03G15/00; G03G15/04; G03G15/043; G03G15/0435
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
80 words
An image reading apparatus comprising: optical means emitting a light beam having image information; light condensing means for condensing the image information light from said optical means; and a convergent type transmitting member array for causing the light beam passed through said light condensing means to be imaged on a light-receiving portion; said light condensing means having different refractive powers in the lengthwise direction of the convergent type transmitting member array and in a direction orthogonal to said lengthwise direction.
Claim 2
Dependent Claim
80 words
An image reading apparatus comprising: optical means emitting a light beam having image information; light condensing means for condensing the image information light from said optical means; and a convergent type transmitting member array for causing the light beam passed through said light condensing means to be imaged on a light-receiving portion; said light condensing means having different refractive powers in the lengthwise direction of the convergent type transmitting member array and in a direction orthogonal to said lengthwise direction.
Claim 3
Dependent Claim
38 words
An image reading apparatus according to claim 1, wherein said light condensing means has a greater refractive power in the direction orthogonal to the lengthwise direction of said convergent type transmitting member array than in said lengthwise direction.
Claim 4
Dependent Claim
48 words
An image reading apparatus according to claim 1, wherein said light condensing means has a cylindrical lens having a refractive power in the lengthwise direction of the convergent type transmitting member array and a cylindrical lens having a refractive power in the direction orthogonal to said lengthwise direction.
Claim 5
Dependent Claim
20 words
An image reading apparatus according to claim 3, wherein at least one of said cylindrical lenses is a Fresnel lens.
Claim 6
Dependent Claim
34 words
An image reading apparatus according to claim 1, wherein in the lengthwise direction of the convergent type transmitting member array, said light condensing means makes the light beam into a substantially parallel light beam.
Claim 7
Dependent Claim
37 words
An image reading apparatus according to claim 1, wherein said light-receiving portion is a photosensitive medium and the read image is reproduced as a recorded image by process means for image formation provided around said photosensitive medium.
Claim 8
Dependent Claim
119 words
An image reading apparatus comprising: an original supporting table for supporting an original thereon; a convergent type transmitting member array for directing the reflected light from the original supported on said original supporting table to a light-receiving portion; an image information light producing portion provided at a location discrete from said original supporting table and emitting an image information light; projection means for projecting the image information light obtained from said image information light producing portion onto said original supporting table; and field lens means provided on said original supporting table; said field lens means having different refractive powers in the lengthwise direction of said convergent type transmitting member array and in a direction orthogonal to said lengthwise direction.
Claim 9
Dependent Claim
119 words
An image reading apparatus comprising: an original supporting table for supporting an original thereon; a convergent type transmitting member array for directing the reflected light from the original supported on said original supporting table to a light-receiving portion; an image information light producing portion provided at a location discrete from said original supporting table and emitting an image information light; projection means for projecting the image information light obtained from said image information light producing portion onto said original supporting table; and field lens means provided on said original supporting table; said field lens means having different refractive powers in the lengthwise direction of said convergent type transmitting member array and in a direction orthogonal to said lengthwise direction.
Claim 10
Dependent Claim
38 words
An image reading apparatus according to claim 7, wherein said field lens means has a greater refractive power in the direction orthogonal to the lengthwise direction of said convergent type transmitting member array than in said lengthwise direction.
Claim 11
Dependent Claim
48 words
An image reading apparatus according to claim 7, wherein said field lens means has a cylindrical lens having a refractive power in the lengthwise direction of the convergent type transmitting member array and a cylindrical lens having a refractive power in the direction orthogonal to said lengthwise direction.
Claim 12
Dependent Claim
20 words
An image reading apparatus according to claim 9, wherein at least one of said cylindrical lenses is a Fresnel lens.
Claim 13
Dependent Claim
34 words
An image reading apparatus according to claim 7, wherein in the lengthwise direction of the convergent type transmitting member array, said field lens means makes the light beam into a substantially parallel light beam.
Claim 14
Dependent Claim
27 words
An image reading apparatus according to claim 7, wherein said field lens means is in contact with said original supporting table during the use of said apparatus.
Claim 15
Dependent Claim
35 words
An image reading apparatus according to claim 7, wherein the original supported on said original supporting table and the convergent type transmitting member array are moved relative to each other, whereby the original is slit-exposed.
Claim 16
Dependent Claim
38 words
An image reading apparatus according to claim 13, wherein when the image information light is projected from said image information light producing portion, one of said original supporting table and said image information light producing portion is slit-exposed.
Claim 17
Dependent Claim
45 words
An image reading apparatus according to claim 13, wherein said image information light producing portion is provided with a recording surface on which recording can be effected by a writing tool and illuminating means for illuminating the recording surface, and the recording surface is slit-exposed.
Claim 18
Dependent Claim
37 words
An image reading apparatus according to claim 7, wherein said light-receiving portion is a photosensitive medium and the read image is reproduced as a recorded image by process means for image formation provided around said photosensitive medium.
Claim 19
Dependent Claim
23 words
An image reading apparatus according to claim 7, wherein said field lens means is provided near an end of the original supporting table.
Claim 20
Dependent Claim
44 words
An image reading apparatus according to claim 7, wherein the length of said field lens means in the lengthwise direction of the convergent type transmitting member array is greater than the length of the convergent type transmitting member array in the lengthwise direction thereof.
Claim 21
Dependent Claim
52 words
An image reading apparatus according to claim 7, wherein the width of said field lens means in the direction orthogonal to the lengthwise direction of the convergent type transmitting member array is greater than the width of the convergent type transmitting member array in the direction orthogonal to the lengthwise direction thereof.
Claim 22
Dependent Claim
112 words
An image reading apparatus comprising: optical means producing a light beam carrying image information; light condensing means for condensing the image information light from said optical means; and imaging means for causing the light beam passed through said light condensing means to be imaged on a light-receiving portion; said light condensing means having a cylindrical lens portion having a refractive power in a first direction and a cylindrical lens portion having a refractive power in a second direction orthogonal to said first direction, and wherein said imaging means is a convergent type transmitting member array and said first direction is coincident with the lengthwise direction of said convergent type transmitting member array.
Claim 23
Dependent Claim
112 words
An image reading apparatus comprising: optical means producing a light beam carrying image information; light condensing means for condensing the image information light from said optical means; and imaging means for causing the light beam passed through said light condensing means to be imaged on a light-receiving portion; said light condensing means having a cylindrical lens portion having a refractive power in a first direction and a cylindrical lens portion having a refractive power in a second direction orthogonal to said first direction, and wherein said imaging means is a convergent type transmitting member array and said first direction is coincident with the lengthwise direction of said convergent type transmitting member array.
Claim 24
Dependent Claim
41 words
An image reading apparatus according to claim 20, wherein said optical means produces an image information light beam by slit exposure and said first direction is coincident with the lengthwise direction of a slit light beam obtained from said optical means.
Claim 25
Dependent Claim
81 words
Condensing lens means for condensing a slit-like image light, characterized in that a surface on which the image light is incident is of a substantially rectangular shape, the refractive power in the lengthwise direction of said incidence surface differs from the refractive power in a direction orthogonal to the lengthwise direction of said incidence surface, and the underside of said condensing lens means is flat so as to be able to be in intimate contact with a flat original supporting table.
Claim 26
Dependent Claim
81 words
Condensing lens means for condensing a slit-like image light, characterized in that a surface on which the image light is incident is of a substantially rectangular shape, the refractive power in the lengthwise direction of said incidence surface differs from the refractive power in a direction orthogonal to the lengthwise direction of said incidence surface, and the underside of said condensing lens means is flat so as to be able to be in intimate contact with a flat original supporting table.
Claim 27
Dependent Claim
37 words
Condensing lens means according to claim 22, wherein the refractive power in the direction orthogonal to the lengthwise direction of said incidence surface is greater than the refractive power in the lengthwise direction of said incidence surface.
References Cited (Backward Citations)
US3157883A
Cited
US3644037A
Cited
US3700325A
Cited
US4298271A
Cited
US4523838A
Cited
US4650317A
Cited
US4678321A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-01 | 1991-08-03 | 1992-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-01 | 1995-08-03 | 1996-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-01 | 1999-08-03 | 2000-02-02 | $7700.00 | Window Closed / Lapsed |