Optical element, lighting device and luminaire
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 16, 2018
Grant Date -
Oct 20, 2016
app pub date -
Dec 24, 2014
filing date -
Jan 3, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Disclosed is an optical element (10) comprising a central cavity (20) extending from a first aperture (12) to a second aperture (14) of the optical element, said central cavity gradually widening in a direction from the first aperture to the second aperture, said central cavity being delimited by a stack of transparent frustums (30) including a first frustum defining the first aperture and a final frustum defining the second aperture, each frustum having a prismatic outer surface (32) having a first surface portion (34) tapering in the direction from the second aperture to the first aperture and a continuous inner surface (36), wherein the respective continuous inner surfaces combine to delimit said central cavity. Also disclosed is a lighting device including such an optical element and a luminaire including such a lighting device.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2014 Application Filing Year
- F21V Class
- 3266 Applications Filed
- 2625 Patents Issued To-Date
- 80.38 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- F21V Class
- 0 % this patent is cited more than
- 7 Age
Maintenance Fees
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|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jul 16, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jul 16, 2029 |
