US4389701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illumination system
Assignee: Axcelis Technologies Inc
•
Filing: 1980-10-27
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Granted: 1983-06-21
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Expires: 2000-10-27
Abstract
Abstract An illumination system having a light source disposed along a central axis of the system is provided with a conical reflector coaxially disposed about the light source for forming an annular virtual image of an arc of the light source. A toroidal lens is coaxially disposed about the central axis for forming a circular real image of the annular virtual image of the arc at the input port of a utilization device.
Inventors
- 👤 Edward H. Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:03
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/20; G03B21/2006; G03B21/2026; G03B21/208; F; F21; F21W; F21W2131/00; F21W2131/40; F21W2131/402
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
75 words
An illumination system comprising: a source of light disposed along a central axis of the illumination system for radiating light outwardly from the central axis; a conical reflector coaxially disposed about the source of light for forming an annular virtual image of the source of light; and a lens coaxially disposed about the central axis of the illumination system for providing a circular real image of the annular virtual image of the source of light.
Claim 2
Dependent Claim
75 words
An illumination system comprising: a source of light disposed along a central axis of the illumination system for radiating light outwardly from the central axis; a conical reflector coaxially disposed about the source of light for forming an annular virtual image of the source of light; and a lens coaxially disposed about the central axis of the illumination system for providing a circular real image of the annular virtual image of the source of light.
Claim 3
Dependent Claim
26 words
An illumination system as in claim 1 wherein the lens is generated by revolving an aspheric lens section about the central axis of the illumination system.
Claim 4
Dependent Claim
14 words
An illumination system as in claim 2 wherein the lens is a toroidal lens.
Claim 5
Dependent Claim
25 words
An illumination system as in claim 1 wherein the lens is generated by revolving a lens section about the central axis of the illumination system.
Claim 6
Dependent Claim
14 words
An illumination system as in claim 4 wherein the lens is a toridal lens.
Claim 7
Dependent Claim
19 words
An illumination system as in claim 1 wherein the source of light is of a mercury or xenon type.
Claim 8
Dependent Claim
25 words
An illumination system as in claim 1 wherein all portions of the real image have the same magnification with respect to the source of light.
Claim 9
Dependent Claim
21 words
An illumination system as in claim 1 wherein the real image is provided at the input port of a light integrator.
Claim 10
Dependent Claim
25 words
An illumination system as in claim 4 wherein all portions of the real image have the same magnification with respect to the source of light.
Claim 11
Dependent Claim
19 words
An illumination system as in claim 9 wherein the source of light is of a mercury or xenon type.
References Cited (Backward Citations)
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Cited
US3457401A
Cited
US3768900A
Cited
US3689760A
Cited
US4225923A
Cited
US4241392A
Cited
US4281366A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-20 | 1986-12-20 | 1987-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-20 | 1990-12-20 | 1991-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-20 | 1994-12-20 | 1995-06-21 | $7700.00 | Window Closed / Lapsed |