US4242725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light reflector structure
Assignee: Chromalloy Corp
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Filing: 1977-12-01
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Granted: 1980-12-30
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Expires: 1997-12-01
Abstract
Abstract An elongated high intensity lamp which serves as a line-type of light source is placed at the focus of a generally shaped parabolic reflector which extends longitudinally with the light source. The reflector surface closest to the lamp is inwardly deformed toward the light source. The inwardly deformed section may itself be a concavely shaped parabolic or arcuate region; or inwardly angled flat sections; or a flat region extending squarely across the top of the reflector. The distortion of the parabolic reflector shape produces a more uniform intensity distribution across the area being illuminated by the lamp and the reflector. A plurality of parallel line-type sources are also disclosed.
Inventors
- 👤 William L. Douma
- 👤 Ward E. Brigham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:33
CPC Classifications
F; F21; F21V; F21V7/00; F21V7/005; F21Y; F21Y2103/00; F21Y2113/00; G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/16
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
131 words
A reflector for producing a uniform distribution of radiation over a given area comprising: a lamp elongated along a straight line and a modified parabolic reflector extending substantially coextensively with said lamp; said lamp being supported generally parallel to and within a relatively short distance of the focal line of said reflector; said reflector defining a parabolic surface except in the central surface region of said reflector, and said central surface region of said reflector being uniformly and symmetrically distorted inwardly toward said lamp and away from said parabolic surface defined by the undistorted regions of said reflector, for modifying the intensity distribution of radiation reflected by said reflector from one having increased intensity toward the laterally central regions of said reflector to one having a more even lateral intensity distribution.
Claim 2
Dependent Claim
131 words
A reflector for producing a uniform distribution of radiation over a given area comprising: a lamp elongated along a straight line and a modified parabolic reflector extending substantially coextensively with said lamp; said lamp being supported generally parallel to and within a relatively short distance of the focal line of said reflector; said reflector defining a parabolic surface except in the central surface region of said reflector, and said central surface region of said reflector being uniformly and symmetrically distorted inwardly toward said lamp and away from said parabolic surface defined by the undistorted regions of said reflector, for modifying the intensity distribution of radiation reflected by said reflector from one having increased intensity toward the laterally central regions of said reflector to one having a more even lateral intensity distribution.
Claim 3
Dependent Claim
26 words
The reflector of claim 1 wherein said central surface region of said reflector consists of a curved, generally cylindrical section which curves inwardly toward said lamp.
Claim 4
Dependent Claim
32 words
The reflector of claim 2 wherein said reflector contains a continuous parabolic shaped portion, and wherein said curved cylindrical section is fixed to the interior surface of said continuous parabolic shaped portion.
Claim 5
Dependent Claim
30 words
The reflector of claim 1 wherein said reflector contains a continuously parabolic shape, and wherein said central surface region of said reflector is fixed to said continuous parabolic shaped section.
Claim 6
Dependent Claim
32 words
The reflector of claim 1 wherein said central surface region of said reflector consists of first and second flat panels defining an inverted V shape having its apex directed toward said lamp.
Claim 7
Dependent Claim
40 words
The reflector of claim 1 wherein said central surface region of said reflector consists of a single flat panel extending lateraly across said reflector and disposed in a plane parallel to the plane containing the open end of said reflector.
Claim 8
Dependent Claim
14 words
The reflector of claim 1 wherein said lamp is an elongated ultraviolet radiation source.
Claim 9
Dependent Claim
14 words
The reflector of claim 1 wherein said reflector includes a metallic, water-cooled support housing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-30 | 1984-06-30 | 1984-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-30 | 1988-06-30 | 1988-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-30 | 1992-06-30 | 1992-12-30 | $7700.00 | Window Closed / Lapsed |