US5004308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rugate reflector
Assignee: Conexant Systems LLC
•
Filing: 1990-05-23
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Granted: 1991-04-02
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Expires: 2010-05-23
Abstract
Abstract An optical reflector includes a substrate, an absorbing layer deposited on the substrate for absorbing light within a broad range of wavelengths, and a rugate film deposited on the absorbing layer and adapted to reflect wavelengths of light within a predetermined range. The reflector may further include a buffer layer disposed between the substrate and the absorbing layer for promoting the adhesion of the absorbing layer to the substrate.
Inventors
- 👤 Randolph L. Hall
- 👤 Christopher D. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:36
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/08; G02B5/0816; G02B5/085; G02B5/0875; G02B5/0883; G02B5/20; G02B5/28; G02B5/289
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
52 words
An optical reflector for selectively reflecting light within a predetermined range of wavelengths, comprising: a substrate; an absorbing layer deposited on the substrate for absorbing light within a broad range of wavelengths; and a rugate film deposited on the absorbing layer and adapted to reflect wavelengths of light within the predetermined range.
Claim 2
Dependent Claim
52 words
An optical reflector for selectively reflecting light within a predetermined range of wavelengths, comprising: a substrate; an absorbing layer deposited on the substrate for absorbing light within a broad range of wavelengths; and a rugate film deposited on the absorbing layer and adapted to reflect wavelengths of light within the predetermined range.
Claim 3
Dependent Claim
29 words
The reflector of claim 1, further comprising a buffer layer disposed between the substrate and the absorbing layer for promoting the adhesion of the absorbing layer to the substrate.
Claim 4
Dependent Claim
21 words
The reflector of claim 2, wherein the substrate further comprises aluminum and the buffer layer further comprises a layer of titanium.
Claim 5
Dependent Claim
30 words
The reflector of claim 3, wherein the absorbing layer further comprises a multilayer absorber comprising alternating layers of chromium and SiO disposed between the buffer layer and the rugate film.
Claim 6
Dependent Claim
42 words
The reflector of claim 4, wherein the alternating layers are graded between the buffer layer and the rugate film, such that the chromium layers are relatively thicker proximate the buffer layer and the SiO layers are relatively thicker proximate the rugate film.
Claim 7
Dependent Claim
60 words
An optical reflector for selectively reflecting light within a predetermined range of wavelengths, comprising: a substrate; a buffer layer deposited on the substrate; an absorbing layer deposited on the buffer layer for absorbing light within a broad range of wavelengths; and a rugate film deposited on the absorbing layer and adapted to reflect wavelengths of light within the predetermined range.
Claim 8
Dependent Claim
60 words
An optical reflector for selectively reflecting light within a predetermined range of wavelengths, comprising: a substrate; a buffer layer deposited on the substrate; an absorbing layer deposited on the buffer layer for absorbing light within a broad range of wavelengths; and a rugate film deposited on the absorbing layer and adapted to reflect wavelengths of light within the predetermined range.
Claim 9
Independent Claim
58 words
A method of making an optical reflector for selectively reflecting light within a predetermined range of wavelengths, comprising the steps of: providing a substrate; depositing an absorbing layer on the substrate for absorbing light within a broad range of wavelengths; and depositing a rugate film on the absorbing layer to reflect wavelengths of flight within the predetermined range.
Claim 10
Independent Claim
58 words
A method of making an optical reflector for selectively reflecting light within a predetermined range of wavelengths, comprising the steps of: providing a substrate; depositing an absorbing layer on the substrate for absorbing light within a broad range of wavelengths; and depositing a rugate film on the absorbing layer to reflect wavelengths of flight within the predetermined range.
Claim 11
Dependent Claim
34 words
The method of claim 7, further comprising the step of depositing a buffer layer on the substrate prior to depositing the absorbing layer for promoting the adhesion of the absorbing layer to the substrate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-04-01 | 1994-10-01 | 1995-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-01 | 1998-10-01 | 1999-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-01 | 2002-10-01 | 2003-04-02 | $7700.00 | Window Closed / Lapsed |