Patent US1434005A successfully refreshed from Google Patents.
US4465337A
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Reduced reflectivity member and ion implantation method of fabrication
Assignee: Westinghouse Electric Corp
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Filing: 1982-03-05
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Granted: 1984-08-14
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Expires: 2002-03-05
Abstract
Abstract An improved minimum light reflectivity, light transmissive vitreous member and method of fabrication in which an ion implanted, buried ion phase layer is provided within the light transmissive member closely spaced from the light output surface. This buried phase layer has an index of refraction greater than the index of refraction of the vitreous member such that the optical impedance of the buried phase layer and the vitreous material are closely watched to minimize reflectivity from the light output surface of the vitreous member.
Inventors
- 👤 Moshe I. Baron
- 👤 Ram Kossowsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:02
CPC Classifications
C; C03; C03C; C03C23/00; C03C23/0005; C03C23/0055; G; G02; G02B; G02B1/00; G02B1/10; G02B1/11; G02B1/113; G02B1/115
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
111 words
A light transmissive vitreous member having minimum light reflectivity from a light output surface, which vitreous member has a first index of refraction for the vitreous material of the member, and wherein an ion implanted, generally uniform thickness layer of buried ion phase of selected material is disposed a predetermined distance within the member below the light output surface, which layer is generally parallel to the light output surface, and which layer has a predetermined thickness and an index of refraction which is greater than the index of refraction of the vitreous material such that the optical impedance of the buried ion phase layer and the vitreous material are closely matched.
Claim 2
Dependent Claim
111 words
A light transmissive vitreous member having minimum light reflectivity from a light output surface, which vitreous member has a first index of refraction for the vitreous material of the member, and wherein an ion implanted, generally uniform thickness layer of buried ion phase of selected material is disposed a predetermined distance within the member below the light output surface, which layer is generally parallel to the light output surface, and which layer has a predetermined thickness and an index of refraction which is greater than the index of refraction of the vitreous material such that the optical impedance of the buried ion phase layer and the vitreous material are closely matched.
Claim 3
Dependent Claim
30 words
The light transmissive vitreous member set forth in claim 1, wherein the implanted ion is aluminum or titanium, and the respective buried phase layer is aluminum oxide or titanium dioxide.
Claim 4
Dependent Claim
39 words
The light transmissive vitreous member set forth in claim 1, wherein the product of the thickness of the buried phase layer and its index of refraction is approximately equal a quarter of the wavelength of the light being transmitted.
Claim 5
Dependent Claim
49 words
The light transmissive vitreous member set forth in claim 1, wherein the member is a faceplate of a cathode ray display tube, with a phosphor screen disposed in the tube interior side of the faceplate, and wherein the buried phase layer is closely spaced from the tube exterior surface.
Claim 6
Independent Claim
104 words
A method of minimizing the reflectivity from the light output surface of an optically transmissive member comprising a material having a first index of refraction, which method comprises: ion implanting a selected ion which forms a buried phase layer at predetermined distance below the light output surface, which buried phase layer is generally parallel to the light output surface, and which buried phase layer has an index of refraction which is greater than the index of refraction of the optically transmissive material and is selected such that the optical impedance of the buried phase is closely matched to that of the optically transmissive material.
Claim 7
Independent Claim
104 words
A method of minimizing the reflectivity from the light output surface of an optically transmissive member comprising a material having a first index of refraction, which method comprises: ion implanting a selected ion which forms a buried phase layer at predetermined distance below the light output surface, which buried phase layer is generally parallel to the light output surface, and which buried phase layer has an index of refraction which is greater than the index of refraction of the optically transmissive material and is selected such that the optical impedance of the buried phase is closely matched to that of the optically transmissive material.
Claim 8
Dependent Claim
59 words
The method set forth in claim 5, wherein the ion selected, the ion fluence, and ion beam energy are selected to implant a buried phase layer of a thickness D 2 approximately equal to D.sub.2 =λ.sub.0 /4N.sub.2, where N 2 is the index of refraction of the buried phase layer, and λ 0 is the wavelength of light transmitted.
Claim 9
Dependent Claim
47 words
The method set forth in claim 6, wherein the buried phase layer is spaced from the light output surface by the dimension D.sub.1 =(λ.sub.0 /4N.sub.1), where N 1 is the index of refraction of the optically transmissive member and λ 0 is the wavelength of light transmitted.
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) | 1987-08-14 | 1988-02-13 | 1988-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-14 | 1992-02-13 | 1992-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-14 | 1996-02-13 | 1996-08-14 | $7700.00 | Window Closed / Lapsed |