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US4536833A
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Lighting fixture utilizing a multi-layered hologram as a lens element
Assignee: Westinghouse Electric Corp
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Filing: 1984-04-16
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Granted: 1985-08-20
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Expires: 2004-04-16
Abstract
Abstract A lighting fixture utilizing a spatially fixed light source and a multi-layered hologram as a lens element. The hologram receives light from the source and directs it to a task area. The layers of the lens element are responsive to light of one or more wavelengths of interest and varying angles of incident radiation so as to diffract light from the source toward the task area.
Inventors
- 👤 Charles S. Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:55
CPC Classifications
F; F21; F21S; F21S6/00; F21S6/002; F21S6/003; F21S8/00; F21V; F21V5/00; F21V5/002; F21V9/00; F21W; F21W2131/00; F21W2131/40; F21W2131/402; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
61 words
A lighting fixture comprising a spatially fixed light source, and a multi-layered holographic lens element receiving light from said source and directing said light to a task area, the layers of said lens element being responsive to light of one or more wavelengths of interest and varying angles of incident radiation to diffract light from said source toward said task area.
Claim 2
Dependent Claim
61 words
A lighting fixture comprising a spatially fixed light source, and a multi-layered holographic lens element receiving light from said source and directing said light to a task area, the layers of said lens element being responsive to light of one or more wavelengths of interest and varying angles of incident radiation to diffract light from said source toward said task area.
Claim 3
Dependent Claim
32 words
A lighting fixture according to claim 1, including a reflective housing mounting said light source therewithin and having a light exit therefrom, and said lens element being mounted across said light exit.
Claim 4
Dependent Claim
16 words
A lighting fixture according to claim 2, in which said light source comprises a fluorescent lamp.
References Cited (Backward Citations)
US3912921A
Cited
US4432044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-19 | 1989-02-18 | 1989-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-19 | 1993-02-18 | 1993-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-19 | 1997-02-18 | 1997-08-20 | $7700.00 | Window Closed / Lapsed |