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US4493535A
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Hybrid transmissive focalizing optical system
Assignee: Individual
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Filing: 1981-09-11
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Granted: 1985-01-15
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Expires: 2001-09-11
Abstract
Abstract There is disclosed an optical system consisting in a floating assembly of a glass plate and of a focalizing part or lens out of plastic material, for instance a styrene-acrylonitril-copolymer, said focalizing part being stressless joined to said glass plate by an intermediary layer out of transparent material having a controlled viscosity, for instance silicone, the assembly being held joined by its peryphery by a frame structure with interposition of a resilient seal. A low concentration of anti-U.V. material is dispersed within the intermediary layer. Utilization more particularly for concentration solar energy in solar collecting systems.
Inventors
- 👤 Andre Champeau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:57
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/06; F; F24; F24S; F24S23/00; F24S23/30; F24S23/31; F24S80/00; F24S80/50; F24S80/70; G02B3/00; G02B3/02; G02B3/08; Y; Y02; Y02E; Y02E10/00; Y02E10/40
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
150 words
A hybrid transmissive focalizing optical system for a solar generator comprising: a support part made of glass; a focalizing part of the Fresnel lens type of a plastic material chosen from the group consisting of the styrene homopolymers and copolymers; a frame structure provided at the periphery of said support part and focalizing part; an intermediary layer of a transparent material provided between said support part and focalizing part, said intermediary layer having a thixotropic structure imparting a controlled viscosity without flowing and having adhesive properties with respect to said glass support part and said focalizing part, said intermediary layer comprised of: a base material chosen from the group consisting of the silicones, polyolefines, paraffinic derivatives and the mixtures thereof, and a low concentration of a micro-powdered agent for adjusting the viscosity thereof, an ultraviolet absorbing substance in a concentration within the concentration of 0.5 to 6 percent by weight.
Claim 2
Dependent Claim
150 words
A hybrid transmissive focalizing optical system for a solar generator comprising: a support part made of glass; a focalizing part of the Fresnel lens type of a plastic material chosen from the group consisting of the styrene homopolymers and copolymers; a frame structure provided at the periphery of said support part and focalizing part; an intermediary layer of a transparent material provided between said support part and focalizing part, said intermediary layer having a thixotropic structure imparting a controlled viscosity without flowing and having adhesive properties with respect to said glass support part and said focalizing part, said intermediary layer comprised of: a base material chosen from the group consisting of the silicones, polyolefines, paraffinic derivatives and the mixtures thereof, and a low concentration of a micro-powdered agent for adjusting the viscosity thereof, an ultraviolet absorbing substance in a concentration within the concentration of 0.5 to 6 percent by weight.
Claim 3
Dependent Claim
18 words
The optical system of claim 1, wherein said frame structure comprises frame members having a U-shaped cross section.
Claim 4
Dependent Claim
13 words
The optical system of claim 1, wherein said anti-U.V. material is a benzotriazol.
Claim 5
Dependent Claim
21 words
The optical system of claim 1 wherein at least one outer face of said focalizing optical system has an anti-reflecting coating.
Claim 6
Dependent Claim
29 words
The optical system of claim 1 wherein a resilient seal is interposed between said frame structure and the assembly comprising said support, said focalizing part and said transparent material.
Claim 7
Dependent Claim
12 words
The optical system of claim 1 wherein said micro-powdered material is silica.
Claim 8
Dependent Claim
23 words
The optical system according to claim 1 wherein said intermediary layer has a substantially constant thickness comprised between about 2/100 and 15/100 mm.
Claim 9
Dependent Claim
25 words
The optical system according to claim 7, wherein said glass part is a plate having a substantially constant thickness comprised between 2 and 5 mm.
Claim 10
Dependent Claim
42 words
The optical system of claim 8, wherein said focalizing part has indentations formed on its face opposite said glass plate and has a minimum average local thickness at the level of the roots of said indentations comprised between 0.5 and 3 mm.
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) | 1988-01-15 | 1988-07-16 | 1989-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-15 | 1992-07-16 | 1993-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-15 | 1996-07-16 | 1997-01-15 | $7700.00 | Window Closed / Lapsed |