US Patent No: 6,639,733
Number of patents in Portfolio can not be more than 2000
High efficiency non-imaging optics
Stats
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Oct 28, 2003
Issued date -
Mar 16, 2001
filing date -
09/810,959
serial no -
In Force
status
Importance
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Abstract
A highly efficient optical device comprises two opposing active non-spherical optical surfaces defined by a two-dimensional representation that is symmetrically extended to provide a three-dimensional device. A focal area, spaced apart from the optical surface and non-contiguous therewith, is defined by the two opposing active optical surfaces. The active optical surfaces each have a continuous second derivative, and the optical surfaces are defined by a polynomial with an order of at least about twenty. The optical device may comprise a transparent dielectric core, and the optical surfaces may be formed on the core. A receiver may be situated at the focal area to provide a concentrator. An extended light source such as an LED may be situated at the focal area, to provide a collimator. Faceted embodiments can provide a low aspect optical device. In some embodiments a diffuser may be used to transform incident radiation into a predetermined shape.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 5,882,774 Optical film | 415 | 1995 | |
| 6,101,032 Light fixture having a multilayer polymeric film | 85 | 1995 | |
| 5,825,542 Diffusely reflecting multilayer polarizers and mirrors | 182 | 1997 | |
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| 5,586,013 Nonimaging optical illumination system | 18 | 1993 | |
| 5,816,693 Nonimaging optical illumination system | 19 | 1996 | |
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| 6,019,485 Nonimaging optical illumination system | 3 | 1998 | |
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| 5,486,940 Liquid crystal light polarizer and method | 9 | 1995 | |
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| 5,055,892 High efficiency lamp or light accepter | 63 | 1989 | |
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| 6,336,738 System and method for high intensity irradiation | 2 | 1997 | |
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| 4,337,759 Radiant energy concentration by optical total internal reflection | 110 | 1981 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Apr 28, 2015 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |