US3860335A
Expired / Lapsed
US
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Optical system
Assignee: RCA Corp
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Filing: 1973-04-26
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Granted: 1975-01-14
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Expires: 1993-04-26
Abstract
Abstract An optical system for projecting a uniform field of light to expose a light-sensitive surface through a transparency in proximity to, or in contact with, the light-sensitive surface comprises a light source, a condenser consisting of two planoconvex quartz lenses, and a field lens consisting of a single plano-convex quartz lens, all disposed serially along an optical axis. The condenser and the field lens are disposed so as to image a light image plane beyond the field lens onto a curved surface, herein called a light object curved surface between the light source and the condenser. Every point in the light object curved surface is focused on the transparency which is in the light image plane, and vice versa.
Inventors
- 👤 Fausto Caprari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:23
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/70; G03F7/70058; G02; G02B; G02B1/00; G02B13/00; G02B13/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
148 words
An optical system comprising: a light source, a condenser, and a field lens disposed serially along an optical axis, s said condenser and said field lens being disposed so as to provide a light object curved surface between said light source and said condenser when a light image plane is disposed beyond said field lens, the combination of both said condenser lens and said field lens comprising a projection lens disposed so that every point in said light image plane is focused on said light object curved surface, and vice versa, said light object curved surface being a portion of an ellipsoid, said light source, when energized, having a candlepower distribution curve that indicates the greatest intensity of light from said light source is on said optical axis, and the curvatures of said candlepower distribution curve and said light object curved surface being substantially opposite to each other.
Claim 2
Dependent Claim
148 words
An optical system comprising: a light source, a condenser, and a field lens disposed serially along an optical axis, s said condenser and said field lens being disposed so as to provide a light object curved surface between said light source and said condenser when a light image plane is disposed beyond said field lens, the combination of both said condenser lens and said field lens comprising a projection lens disposed so that every point in said light image plane is focused on said light object curved surface, and vice versa, said light object curved surface being a portion of an ellipsoid, said light source, when energized, having a candlepower distribution curve that indicates the greatest intensity of light from said light source is on said optical axis, and the curvatures of said candlepower distribution curve and said light object curved surface being substantially opposite to each other.
Claim 3
Dependent Claim
137 words
An optical system comprising: a light source, a condenser, and a field lens disPosed serially along an optical axis, said condenser and said field lens being disposed so as to provide a light object curved surface between said light source and said condenser when a light image plane is disposed beyond said field lens, whereby every point in said light image plane is focused on said light object curved surface, and vice versa, said light source is a mercury arc lamp having an elongated mercury arc that is disposed on, and transversely to, said optical axis, an aperture stop is disposed between said condenser and said field lens, and every point in said light object curved surface is projected and magnified by the combination of both said condenser and said field lens onto said light image plane.
Claim 4
Dependent Claim
137 words
An optical system comprising: a light source, a condenser, and a field lens disPosed serially along an optical axis, said condenser and said field lens being disposed so as to provide a light object curved surface between said light source and said condenser when a light image plane is disposed beyond said field lens, whereby every point in said light image plane is focused on said light object curved surface, and vice versa, said light source is a mercury arc lamp having an elongated mercury arc that is disposed on, and transversely to, said optical axis, an aperture stop is disposed between said condenser and said field lens, and every point in said light object curved surface is projected and magnified by the combination of both said condenser and said field lens onto said light image plane.
Claim 5
Dependent Claim
133 words
An optical system comprising: a light source, a condenser, and a field lens disposed serially along an optical axis, said condenser and said field lens being disposed so as to provide a light object curved surface between said light source and said condenser when a light image plane is disposed beyond said field lens, whereby every point in said light image plane is focused on said light object curved surface, and vice versa, said light source is a mercury arc lamp that comprises a mercury arc enclosed within a transparent envelope, said light source, when energized, has a candle-power distribution curve that is opposite in curvature to that of said light object curved surface, and said light object curved surface, at said optical axis, is adjacent to, but slightly spaced from, said envelope.
Claim 6
Dependent Claim
133 words
An optical system comprising: a light source, a condenser, and a field lens disposed serially along an optical axis, said condenser and said field lens being disposed so as to provide a light object curved surface between said light source and said condenser when a light image plane is disposed beyond said field lens, whereby every point in said light image plane is focused on said light object curved surface, and vice versa, said light source is a mercury arc lamp that comprises a mercury arc enclosed within a transparent envelope, said light source, when energized, has a candle-power distribution curve that is opposite in curvature to that of said light object curved surface, and said light object curved surface, at said optical axis, is adjacent to, but slightly spaced from, said envelope.
References Cited (Backward Citations)
US1908043A
Cited
US3222981A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |