Patent US4935166A successfully refreshed from Google Patents.
US4935166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Narrow band selective absorption filter
Assignee: Honeywell Inc
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Filing: 1985-09-17
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Granted: 1990-06-19
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Expires: 2005-09-17
Abstract
Abstract A solid state form of a dye-solution absorption filter is disclosed. Physical vapor depositable (i.e., evaporable) dyes are codeposited with a polyester matrix in a vacuum system to randomly disperse dye molecules in a solid dilutant. The dyes are selected to absorb at the wavelengths of interest. Dilution in a transparent matrix affords narrow band absorption and good out of band transmittance. Multilayer configurations allow absorption of a plurality of wavelengths. The filter coating conforms to curved and sharply contoured surfaces and layers only 10 microns thick afford very high absorptance.
Inventors
- 👤 James C. Lee
- 👤 David Greenlaw
- 👤 Sau K. Lo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:20
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/22; G02B5/223; G21; G21F; G21F1/00; G21F1/02; G21F1/10; G21F1/103
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
105 words
A thin film coating produced by physical vapor deposition, for filtering a selected wavelength of electromagnetic energy, said selected wavelength being within a range of wavelengths, said coating comprising: a dye selected from the group consisting of the porphyrins, metallo-phthalocyanines, rare-earth diphthalocyanines, cyanines, carbocyanines, merocyanines, squaryliums and tetracenes, wherein said dye strongly absorbs at said selected wavelength; and an inert organic polymer for diluting and holding said dye in a solid form, said polymer being substantially transparent to at least the majority of wavelengths in said range other than said selected wavelength, and wherein molecules of said dye are dispersed substantially randomly throughout said polymer.
Claim 2
Dependent Claim
105 words
A thin film coating produced by physical vapor deposition, for filtering a selected wavelength of electromagnetic energy, said selected wavelength being within a range of wavelengths, said coating comprising: a dye selected from the group consisting of the porphyrins, metallo-phthalocyanines, rare-earth diphthalocyanines, cyanines, carbocyanines, merocyanines, squaryliums and tetracenes, wherein said dye strongly absorbs at said selected wavelength; and an inert organic polymer for diluting and holding said dye in a solid form, said polymer being substantially transparent to at least the majority of wavelengths in said range other than said selected wavelength, and wherein molecules of said dye are dispersed substantially randomly throughout said polymer.
Claim 3
Dependent Claim
20 words
The coating of claim 1 wherein said organic polymer is selected from the group consisting of the polyesters and polypropylenes.
Claim 4
Dependent Claim
16 words
The coating of claim 1 wherein said polymer is a polyester and said dye is chloroaluminumchlorophthalocyanine.
Claim 5
Dependent Claim
17 words
The coating of claim 1 wherein said polymer is a polyester and said dye is vanadyl phthalocyanine.
Claim 6
Dependent Claim
17 words
The coating of claim 1 wherein said polymer is a polyester and said dye is platinum octaethylporphine.
Claim 7
Dependent Claim
84 words
An absorption filter for filtering a selected wavelength of electromagnetic energy, said selected wavelength being within a range of wavelengths, said filter comprising: an evaporable dye, wherein said dye strongly absorbs at said selected wavelength; and an evaporable, inert organic polymer for diluting and holding said dye in a solid form, said polymer being substantially transparent to at least the majority of wavelengths in said range other than said selected wavelength, and wherein molecules of said dye are dispersed substantially randomly through said polymer.
Claim 8
Dependent Claim
84 words
An absorption filter for filtering a selected wavelength of electromagnetic energy, said selected wavelength being within a range of wavelengths, said filter comprising: an evaporable dye, wherein said dye strongly absorbs at said selected wavelength; and an evaporable, inert organic polymer for diluting and holding said dye in a solid form, said polymer being substantially transparent to at least the majority of wavelengths in said range other than said selected wavelength, and wherein molecules of said dye are dispersed substantially randomly through said polymer.
Claim 9
Dependent Claim
135 words
A multilayered absorption filter for filtering out a plurality of selected wavelengths of electromagnetic energy, said selected wavelengths being within a range of wavelengths, said filter comprising: a plurality of dyes, each of said dyes being selected from the group consisting of the porphyrins, metallo-phthalocyanines, rare-earth diphthalocyanines, cyanines, carbocyanines, mercocyanines, squaryliums and tetracenes, wherein each of said wavelengths is strongly absorbed by at least one of said dyes; and an inert organic polyester, for diluting and holding said dyes in a multilayered solid form, wherein each of said dyes is held in a different layer than the other of said dyes; wherein molecules of said dyes are dispersed substantially randomly within their respective layers; and said polyester is substantially transparent to at least a majority of wavelengths in said range other than said selected wavelengths.
Claim 10
Dependent Claim
135 words
A multilayered absorption filter for filtering out a plurality of selected wavelengths of electromagnetic energy, said selected wavelengths being within a range of wavelengths, said filter comprising: a plurality of dyes, each of said dyes being selected from the group consisting of the porphyrins, metallo-phthalocyanines, rare-earth diphthalocyanines, cyanines, carbocyanines, mercocyanines, squaryliums and tetracenes, wherein each of said wavelengths is strongly absorbed by at least one of said dyes; and an inert organic polyester, for diluting and holding said dyes in a multilayered solid form, wherein each of said dyes is held in a different layer than the other of said dyes; wherein molecules of said dyes are dispersed substantially randomly within their respective layers; and said polyester is substantially transparent to at least a majority of wavelengths in said range other than said selected wavelengths.
Claim 11
Dependent Claim
115 words
A multilayered absorption filter for filtering out a plurality of selected wavelengths of electromagnetic energy, said selected wavelengths being within a range of wavelengths, said filter comprising: a plurality of evaporable dyes, wherein each of said wavelengths is strongly absorbed by at least one of said dyes; and an evaporable, inert organic polyester, for diluting and holding said dyes in a multilayered solid form, wherein each of said dyes is held in a different layer than the other of said dyes; wherein molecules of said dyes are dispersed substantially randomly within their respective layers; and said polyester is substantially transparent to at least the majority of wavelengths in said rang other than said selected wavelengths.
Claim 12
Dependent Claim
115 words
A multilayered absorption filter for filtering out a plurality of selected wavelengths of electromagnetic energy, said selected wavelengths being within a range of wavelengths, said filter comprising: a plurality of evaporable dyes, wherein each of said wavelengths is strongly absorbed by at least one of said dyes; and an evaporable, inert organic polyester, for diluting and holding said dyes in a multilayered solid form, wherein each of said dyes is held in a different layer than the other of said dyes; wherein molecules of said dyes are dispersed substantially randomly within their respective layers; and said polyester is substantially transparent to at least the majority of wavelengths in said rang other than said selected wavelengths.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
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