Patent US3645600A successfully refreshed from Google Patents.
US3645600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat absorbing reflector utilizing a metallic substrate
Assignee: Bausch and Lomb Inc
•
Filing: 1970-11-03
•
Granted: 1972-02-29
•
Expires: 1990-11-03
Abstract
Abstract A reflector, for reflecting generally all wavelengths of radiation of visible light from a multilayer interference reflecting coating for generally concentrated projection of the visible light and for absorbing substantially all wavelengths of radiation of heat, is provided for by a metallic substrate having formed thereon, between it and the multilayer interference reflecting coating, an antireflection coating having a continuously graded refractive index for transmission therethrough of wavelengths of heat radiation for absorption into the metallic substrate.
Inventors
- 👤 Michael Doctoroff
- 👤 Bernt D Hoppert
- 👤 Steven H Leece
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:38
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/08; G02B5/0883; G02B5/20; G02B5/26; G02B5/28; G02B5/281; G02B5/282
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
A reflector for reflecting generally all wavelengths of radiation for providing visible light, and for absorbing substantially all wavelengths of radiation for providing heat thereby precluding wavelengths of heat radiation from being reflected from the reflector, comprises: a metallic substrate having a high thermal conductivity; an antireflection coating disposed upon a surface of the metallic substrate, said antireflection coating for transmitting heat in the direction of the metallic substrate and for precluding reflection of heat wavelengths of radiation therefrom; and a multilayer interference reflecting coating disposed upon the antireflection coating for reflecting substantially all wavelengths of radiation for providing visible light and for transmitting therethrough to the antireflection coating and to the metallic substrate for absorption, substantially all wavelengths of radiation for providing heat.
Claim 2
Dependent Claim
124 words
A reflector for reflecting generally all wavelengths of radiation for providing visible light, and for absorbing substantially all wavelengths of radiation for providing heat thereby precluding wavelengths of heat radiation from being reflected from the reflector, comprises: a metallic substrate having a high thermal conductivity; an antireflection coating disposed upon a surface of the metallic substrate, said antireflection coating for transmitting heat in the direction of the metallic substrate and for precluding reflection of heat wavelengths of radiation therefrom; and a multilayer interference reflecting coating disposed upon the antireflection coating for reflecting substantially all wavelengths of radiation for providing visible light and for transmitting therethrough to the antireflection coating and to the metallic substrate for absorption, substantially all wavelengths of radiation for providing heat.
Claim 3
Dependent Claim
15 words
The reflector as defined in claim 1, wherein the metallic substrate is formed of aluminum.
Claim 4
Dependent Claim
23 words
The reflector as defined in claim 1, wherein the antireflection coating disposed upon the surface of the metallic substrate comprises an anodized layer.
Claim 5
Dependent Claim
24 words
The reflector as defined in claim 1, wherein the antireflection coating disposed upon the surface of the metallic substrate comprises a baked aluminum layer.
Claim 6
Dependent Claim
40 words
The reflector as defined in claim 1, further including: a layer deposited proximate the multilayer interference reflecting coating for absorbing a selected range of the heat radiation to thereby control the quantity of heat transmitted therethrough to the metallic substrate.
Claim 7
Dependent Claim
16 words
The reflector as defined in claim 5, wherein the last mentioned layer is formed of germanium.
References Cited (Backward Citations)
US2852980A
Cited
US2914989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |