US4683525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamp having segmented reflector
Assignee: Fusion Systems Corp
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Filing: 1986-11-05
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Granted: 1987-07-28
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Expires: 2006-11-05
Abstract
Abstract A lamp comprised of a light source and reflector wherein the reflector is comprised of a plurality of annular segments which are arranged with respect to the source and a target to be irradiated so that points on the target receive radiation which is reflected from a different number of segments with points on the target which are closer to the periphery thereof receiving radiation which is reflected from a greater number of segments then points which are closer to the center of the target in such manner that due to the increase in target area in a direction from the target center to periphery the radiation incident across the entire target area is substantially uniform, and whereby the average local divergence of radiation incident on the target is minimized and spatial non-uniformities are relatively averaged.
Inventors
- 👤 David M. Camm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:35
CPC Classifications
F; F21; F21V; F21V7/00; F21V7/04; F21V7/09
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
196 words
A lamp for providing both substantially uniform light flux and small average local divergence over the extent of a target of variable transparency to be illuminated, comprising a light source for emitting radiation, and a reflector in which said light source is disposed, said reflector having an axis and being comprised of a plurality of annular reflecting segments which are symmetrical with respect to said axis and which are arranged with respect to said source and the area of a target of variable transparency to be illuminated so that the points on said target receive radiation which is reflected from a plurality of different segments with points on the target which are closer to the periphery thereof receiving radiation which is reflected from a greater number of segments then points which are closer to the center of the target in such manner that due to the increase in target area in the direction from the target center to periphery the radiation incident across the entire target area is substantially uniform, and whereby the radiation incident on the variable transparency target is averaged over the reflecting segments and the average local divergence of such radiation is minimized.
Claim 2
Dependent Claim
196 words
A lamp for providing both substantially uniform light flux and small average local divergence over the extent of a target of variable transparency to be illuminated, comprising a light source for emitting radiation, and a reflector in which said light source is disposed, said reflector having an axis and being comprised of a plurality of annular reflecting segments which are symmetrical with respect to said axis and which are arranged with respect to said source and the area of a target of variable transparency to be illuminated so that the points on said target receive radiation which is reflected from a plurality of different segments with points on the target which are closer to the periphery thereof receiving radiation which is reflected from a greater number of segments then points which are closer to the center of the target in such manner that due to the increase in target area in the direction from the target center to periphery the radiation incident across the entire target area is substantially uniform, and whereby the radiation incident on the variable transparency target is averaged over the reflecting segments and the average local divergence of such radiation is minimized.
Claim 3
Dependent Claim
51 words
The lamp of claim 1 wherein first target points which are removed from the target center receive radiation from more reflecting segments than the target center, and wherein target points which are further removed from the target center than said first points receive radiation from more segments than said first points.
Claim 4
Dependent Claim
11 words
The lamp of claim 1 wherein said annular segments are flat.
Claim 5
Dependent Claim
15 words
The lamp of claim 1 wherein said light source is a volume emitter of radiation.
Claim 6
Dependent Claim
25 words
The lamp of claim 2 wherein said target receives direct radiation from said light source in addition to radiation which is reflected from said segments.
Claim 7
Dependent Claim
59 words
The lamp of claim 2 wherein said reflecting segments are arranged with respect to said source and target so that the center of the target is illuminated by only one segment, target points somewhat removed from the center are illuminated by two segments, and points further removed from said points illuminated by two segments are illuminated by three segments.
Claim 8
Dependent Claim
15 words
The lamp of claim 3 wherein the opening defined by said annular segments is circular.
Claim 9
Dependent Claim
13 words
The lamp of claim 4 wherein said light source is spherical in shape.
Claim 10
Dependent Claim
11 words
The lamp of claim 2 wherein said annular segments are flat.
Claim 11
Dependent Claim
15 words
The lamp of claim 2 wherein the opening defined by said annular segments is circular.
Claim 12
Dependent Claim
15 words
The lamp of claim 2 wherein said light source is a volume emitter of radiation.
Claim 13
Dependent Claim
13 words
The lamp of claim 11 wherein said light source is spherical in shape.
Claim 14
Dependent Claim
13 words
The lamp of claim 6 wherein the reflector has at least five segments.
Claim 15
Dependent Claim
44 words
The lamp of claim 13 wherein target points further removed from the center than those illuminated by three segments are illuminated by four segments, and those points further removed from the target center than those illuminated by four segments, are illuminated by five segments.
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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) | 1990-07-27 | 1991-01-26 | 1991-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-27 | 1995-01-26 | 1995-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-27 | 1999-01-26 | 1999-07-28 | $7700.00 | Window Closed / Lapsed |