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US5340607A
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Vapor-deposition material for the production of high-refraction optical coatings
Assignee: Merck Patent GmbH
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Filing: 1993-03-19
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Granted: 1994-08-23
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Expires: 2013-03-19
Abstract
Abstract The invention relates to a vapor-deposition material for the production of high-refraction optical coatings by coating substrates in vacuo. The material is a compound of the formula La 2 TiO 7-x where x=from 0.3 to 0.7.
Inventors
- 👤 Martin Friz
- 👤 Detlef Albrecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:52
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/10; C; C23; C23C; C23C14/00; C23C14/06; C23C14/08; C23C14/22; C23C14/24; C23C14/28; C23C14/30; G02B5/00; G02B5/20; G02B5/28; G02B5/285
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
16 words
A production of compound of the formula La 2 Ti 2 O 7-x , wherein x=0.3-0.7.
Claim 2
Dependent Claim
16 words
A production of compound of the formula La 2 Ti 2 O 7-x , wherein x=0.3-0.7.
Claim 3
Dependent Claim
9 words
A compound of claim 1, wherein x is 0.5.
Claim 4
Dependent Claim
84 words
A process for the preparation of a vapor deposition material comprising a compound of the formula La 2 Ti 2 O 7-x , wherein x is 0.3-0.7, comprising: combining an amount of a lanthanum oxide and an amount of a titanium oxide to obtain a combination of oxides, wherein said combination has a La:Ti:O ratio of 2:2:7-x, wherein x is 0.3-0.7; and sintering said combination of oxides under vacuum at a temperature which is below the melting point of the oxides and metallic titanium.
Claim 5
Dependent Claim
84 words
A process for the preparation of a vapor deposition material comprising a compound of the formula La 2 Ti 2 O 7-x , wherein x is 0.3-0.7, comprising: combining an amount of a lanthanum oxide and an amount of a titanium oxide to obtain a combination of oxides, wherein said combination has a La:Ti:O ratio of 2:2:7-x, wherein x is 0.3-0.7; and sintering said combination of oxides under vacuum at a temperature which is below the melting point of the oxides and metallic titanium.
Claim 6
Dependent Claim
24 words
A process of claim 3, wherein x=0.5 and a compound of the formula La 2 Ti 2 O 6 .5 is recovered after sintering.
Claim 7
Dependent Claim
22 words
A process of claim 3, wherein said lanthanum oxide is La 2 O 3 and said titanium oxide is TiO 2 .
Claim 8
Dependent Claim
29 words
A process of claim 5, further comprising combining Ti 2 O 3 or TiO with said La 2 O 3 and TiO 2 to form said combination of oxides.
Claim 9
Dependent Claim
13 words
A process of claim 3, wherein the vacuum is 10-3 to 10-6 mbar.
Claim 10
Dependent Claim
13 words
A process of claim 3, wherein the vacuum is 10-4 to 10-6 mbar.
Claim 11
Dependent Claim
25 words
A process according to claim 3, wherein metallic titanium is combined with said lanthanum oxide and said titanium oxide to form said combination of oxides.
Claim 12
Dependent Claim
37 words
A process for the production of a substrate with a high-refraction optical coating, comprising coating said substrate with a compound of the formula La 2 Ti 2 O 7-x , wherein x is 0.3-0.7, by vapor deposition.
Claim 13
Dependent Claim
37 words
A process for the production of a substrate with a high-refraction optical coating, comprising coating said substrate with a compound of the formula La 2 Ti 2 O 7-x , wherein x is 0.3-0.7, by vapor deposition.
Claim 14
Dependent Claim
13 words
A process of claim 10, wherein the coating is accomplished by electron-beam evaporation.
Claim 15
Dependent Claim
16 words
A process of claim 10, wherein the refractive index of the high-refraction optical coating is 1.9-2.4.
Claim 16
Dependent Claim
16 words
A process of claim 10, wherein the refractive index of the high-refraction optical coating is 2.0-2.2.
Claim 17
Dependent Claim
33 words
A process for the production of a substrate with a high-refraction optical coating, comprising coating said substrate with a compound of the formula La 2 Ti 2 O 6 .5 by vapor deposition.
Claim 18
Dependent Claim
33 words
A process for the production of a substrate with a high-refraction optical coating, comprising coating said substrate with a compound of the formula La 2 Ti 2 O 6 .5 by vapor deposition.
Claim 19
Dependent Claim
49 words
In a process for the production of a substrate with a high-refraction optical coating by vapor deposition of said substrate in a vacuum, the improvement comprising coating said substrate with a compound of the formula La 2 Ti 2 O 7-x , wherein x is 0.3-0.7, by vapor deposition.
Claim 20
Dependent Claim
49 words
In a process for the production of a substrate with a high-refraction optical coating by vapor deposition of said substrate in a vacuum, the improvement comprising coating said substrate with a compound of the formula La 2 Ti 2 O 7-x , wherein x is 0.3-0.7, by vapor deposition.
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JPS541037A
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JPS61247607A
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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) | 1997-08-22 | 1998-02-21 | 1998-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-22 | 2002-02-21 | 2002-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-22 | 2006-02-21 | 2006-08-23 | $7700.00 | Window Closed / Lapsed |