Patent US5607229A successfully refreshed from Google Patents.
US5607229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illumination system including an asymmetrical projection reflector
Assignee: Radiant Imaging Inc
•
Filing: 1995-04-03
•
Granted: 1997-03-04
•
Expires: 2015-04-03
Abstract
Abstract An illumination system for providing higher efficiency and greater control over uniformity of illumination of non-circular apertures, which are commonly rectangular. The illumination system comprises a reflector of substantially ellipsoidal form surrounding a light source, and which has a concave reflection surface formed of a plurality of curved reflective segments extending along the length of the reflection surface, each of which is tilted and rotated by a predetermined amount to direct light from the reflector almost entirely into the area encompassed by the rectangular aperture including portions of the area which lie outside of a circular area inscribed within the aperture.
Inventors
- 👤 Ronald F. Rykowski
- 👤 Steven S. Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:05
CPC Classifications
F; F21; F21V; F21V7/00; F21V7/0066; F21S; F21S41/00; F21S41/30; F21S41/32; F21S41/33; F21S41/334; F21S41/336
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
101 words
An illumination system including a non-circular aperture, a light source, and a projector reflector, all displaced from one another along an optical axis, said reflector being constructed to match the cross-section of the output luminous flux from the reflector with the non-circular aperture, said reflector having a reflective surface formed of a plurality of reflective segments individually tilted and rotated with respect to a reference surface by respective predetermined amounts to shift light from said source away from the optical axis and into selected regions of said aperture to cause the entire area circumscribed by said aperture to be uniformly illuminated.
Claim 2
Dependent Claim
101 words
An illumination system including a non-circular aperture, a light source, and a projector reflector, all displaced from one another along an optical axis, said reflector being constructed to match the cross-section of the output luminous flux from the reflector with the non-circular aperture, said reflector having a reflective surface formed of a plurality of reflective segments individually tilted and rotated with respect to a reference surface by respective predetermined amounts to shift light from said source away from the optical axis and into selected regions of said aperture to cause the entire area circumscribed by said aperture to be uniformly illuminated.
Claim 3
Dependent Claim
22 words
The illumination system defined in claim 1, in which said surface segments are all formed to have a single circularly symmetric shape.
Claim 4
Dependent Claim
16 words
The illumination system defined in claim 2, in which said circularly symmetric shape is substantially ellipsoidal.
Claim 5
Dependent Claim
19 words
The illumination system defined in claim 2, in which said segments are all of a single surface of revolution.
Claim 6
Dependent Claim
24 words
The illumination system defined in claim 1, in which said segments are all derived from a single circularly symmetrical surface of substantially ellipsoidal form.
Claim 7
Dependent Claim
15 words
The illumination system defined in claim 5, in which said segments encompass unequal angular segments.
Claim 8
Dependent Claim
19 words
The illumination system defined in claim 1, in which said reflection surface segments each has a substantially different profile.
Claim 9
Dependent Claim
19 words
The illumination system defined in claim 1 in which said concave reflection surface comprises a plurality of flat sections.
Claim 10
Dependent Claim
39 words
The illumination system defined in claim 1, in which said aperture has a rectangular configuration with corner regions and in which said reflector directs light from said luminous flux away from said optical axis and into said corner regions.
References Cited (Backward Citations)
US4171874A
Cited
US4149227A
Cited
US4428038A
Cited
US4855886A
Cited
US4735495A
Cited
US5008781A
Cited
US5047903A
Cited
US5150138A
Cited
US5142387A
Cited
US5123729A
Cited
US5295005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-03-03 | 2000-09-02 | 2001-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-03 | 2004-09-02 | 2005-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-03 | 2008-09-02 | 2009-03-04 | $7700.00 | Window Closed / Lapsed |