US3827062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical arrangement for high speed printout system
Assignee: Xerox Corp
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Filing: 1972-12-18
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Granted: 1974-07-30
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Expires: 1992-12-18
Abstract
Abstract A printing system including a photoconductive surface having a charge placed over an area of the surface. An optical means for selectively discharging portions of that area is employed to form a charge and discharge portion representative of an electrostatic latent image. The optical means includes an array of light emitting solid state devices with appropriate logic circuitry for selectively energizing certain elements of the array in order to form the electrostatic latent image. In order to position the light images in a line and more closely together than their respective sources, the light emitting sources are placed in two parallel linear arrays. The images of each linear array are combined by projection through a bi-prism to effect a single linear array of closely packed light images.
Inventors
- 👤 L Mailloux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:27
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/024; H04N1/032; H04N1/036; B; B41; B41J; B41J2/00; B41J2/435; B41J2/447; B41J2/45; B41J2/451; G; G02; G02B; G02B5/00; G02B5/001; G06; G06K; G06K15/00; G06K15/02; G06K15/12; G06K15/1238; G06K15/1242; G06K15/1247
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
138 words
Optical apparatus for aligning the images of a plurality of offset spot sources of light for character generation by the selective on-off condition of said spot sources resulting in corresponding selective spot imaging, including: a plurality of substantially monochromatic spot sources of light spaced from each other and spaced relative to an optical axis, a projection lens disposed along said optical axis between said spot sources and an image plane for projecting images of said spot sources on said image plane, each such projection being along an individual projection axis corresponding to a single spot source, refraction means disposed between said spot sources and said image plane to refract said projection axes and direct all of said projection axes to a common image line, whereby said images are aligned in a single linear array, free of chromatic aberration.
Claim 2
Dependent Claim
138 words
Optical apparatus for aligning the images of a plurality of offset spot sources of light for character generation by the selective on-off condition of said spot sources resulting in corresponding selective spot imaging, including: a plurality of substantially monochromatic spot sources of light spaced from each other and spaced relative to an optical axis, a projection lens disposed along said optical axis between said spot sources and an image plane for projecting images of said spot sources on said image plane, each such projection being along an individual projection axis corresponding to a single spot source, refraction means disposed between said spot sources and said image plane to refract said projection axes and direct all of said projection axes to a common image line, whereby said images are aligned in a single linear array, free of chromatic aberration.
Claim 3
Dependent Claim
145 words
Optical apparatus for aligning the images of a plurality of offset spot sources of light for character generation by the selective on-off condition of said spot sources resulting in corresponding selective spot imaging, including: a plurality of substantially monochromatic spot sources of light which are aligned in parallel linear arrays on opposite sides of an optical axis and equally spaced therefrom, a projection lens disposed along said optical axis between said spot sources and an image plane for projecting images of said spot sources on said image plane, each such projection being along an individual projection axis corresponding to a single spot source of light, a prism means disposed between said light sources and said image plane to refract said projection axes and direct the same to a common image line, whereby said images are aligned in a single linear array, free of chromatic aberration.
Claim 4
Dependent Claim
145 words
Optical apparatus for aligning the images of a plurality of offset spot sources of light for character generation by the selective on-off condition of said spot sources resulting in corresponding selective spot imaging, including: a plurality of substantially monochromatic spot sources of light which are aligned in parallel linear arrays on opposite sides of an optical axis and equally spaced therefrom, a projection lens disposed along said optical axis between said spot sources and an image plane for projecting images of said spot sources on said image plane, each such projection being along an individual projection axis corresponding to a single spot source of light, a prism means disposed between said light sources and said image plane to refract said projection axes and direct the same to a common image line, whereby said images are aligned in a single linear array, free of chromatic aberration.
Claim 5
Dependent Claim
30 words
Optical apparatus as defined in claim 2 in which each of said spot sources is longitudinally displaced relative to the next by substantially the pupil of a single spot source.
Claim 6
Dependent Claim
148 words
A pair of parallel linear arrays of substantially monochromatic spot sources of light disposed equidistant from an optical axis extending perpendicularly to said linear arrays, each of said linear arrays being displaced along its linear axis relative to the other by substantially half the distance between centers of individual spot sources, a projection lens disposed along said optical aXis between said spot sources and an image plane for projecting images of said spot sources on said image plane for character generation by the selective on-off condition of said spot sources resulting in corresponding selective spot imaging, prism means disposed between said spot sources and said image plane to refract light propagating therebetween so that images of said linear arrays lie on a common image line, whereby the images of said spot sources are aligned in a higher density array than the light sources themselves, free of chromatic aberration.
Claim 7
Dependent Claim
148 words
A pair of parallel linear arrays of substantially monochromatic spot sources of light disposed equidistant from an optical axis extending perpendicularly to said linear arrays, each of said linear arrays being displaced along its linear axis relative to the other by substantially half the distance between centers of individual spot sources, a projection lens disposed along said optical aXis between said spot sources and an image plane for projecting images of said spot sources on said image plane for character generation by the selective on-off condition of said spot sources resulting in corresponding selective spot imaging, prism means disposed between said spot sources and said image plane to refract light propagating therebetween so that images of said linear arrays lie on a common image line, whereby the images of said spot sources are aligned in a higher density array than the light sources themselves, free of chromatic aberration.
References Cited (Backward Citations)
US3007380A
Cited
US3286585A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |