US5245474A
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Electromagnetic filter device
Assignee: Alcatel Lucent SAS
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Filing: 1991-11-20
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Granted: 1993-09-14
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Expires: 2011-11-20
Abstract
Abstract The optical filter device comprises a stack of thin layers exhibiting a sequences h and g which defines a fractal organization. This device makes it possible to obtain spectrum lines which are extremely fine and very well resolved.
Inventors
- 👤 Genevieve Chabassier
- 👤 Jean-Michael Gabriagues
- 👤 Frederic Heliodore
- 👤 Alain Le Mehaute
- 👤 Jacques Mouchart
- 👤 Philippe Sautet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:16
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/28; G02B5/285
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
77 words
Electromagnetic filtering device comprising a stack A n , wherein n is greater than or equal to 2, said stack consisting of layers A and B having the thicknesses e A and e B respectively, and the refractive indices n A and n B respectively, and wherein said stack A n has the following fractal configuration: A.sub.n =A.sub.n-1 B.sub.n-1 A.sub.n-1 where B n =B n-1 B n-1 B n-1 , A 1 =ABA and B 1 =BBB.
Claim 2
Dependent Claim
77 words
Electromagnetic filtering device comprising a stack A n , wherein n is greater than or equal to 2, said stack consisting of layers A and B having the thicknesses e A and e B respectively, and the refractive indices n A and n B respectively, and wherein said stack A n has the following fractal configuration: A.sub.n =A.sub.n-1 B.sub.n-1 A.sub.n-1 where B n =B n-1 B n-1 B n-1 , A 1 =ABA and B 1 =BBB.
Claim 3
Dependent Claim
70 words
Electromagnetic filtering device comprising a stack A n , wherein n is greater than or equal to 2, said stack consisting of layers A and B having the thicknesses e A and e B respectively, and the refractive indices n A and n B respectively, and wherein said stack A n has the following fractal configuration: A.sub.n =A.sub.n-1 B.sub.n-1 A.sub.n-1 where B.sub.n =A.sub.n-1 A.sub.n-1 A.sub.n-1, A.sub.1 =ABA and B.sub.1 =AAA.
Claim 4
Dependent Claim
70 words
Electromagnetic filtering device comprising a stack A n , wherein n is greater than or equal to 2, said stack consisting of layers A and B having the thicknesses e A and e B respectively, and the refractive indices n A and n B respectively, and wherein said stack A n has the following fractal configuration: A.sub.n =A.sub.n-1 B.sub.n-1 A.sub.n-1 where B.sub.n =A.sub.n-1 A.sub.n-1 A.sub.n-1, A.sub.1 =ABA and B.sub.1 =AAA.
Claim 5
Dependent Claim
73 words
Electromagnetic filtering device comprising a stack A n , wherein n is greater than or equal to 2, said stack consisting of layers A and B having the thicknesses e A and e B respectively, and the refractive indices n A and n B respectively, and wherein said stack A n has the following fractal configuration: A.sub.n =A.sub.n-1 B.sub.n-1 A.sub.n-1 B.sub.n-1 A.sub.n-1 where B.sub.n =B.sub.n-1 B.sub.n-1 B.sub.n-1 B.sub.n-1 B.sub.n-1, A.sub.1 =ABABA, B.sub.1 =BBBBB.
Claim 6
Dependent Claim
73 words
Electromagnetic filtering device comprising a stack A n , wherein n is greater than or equal to 2, said stack consisting of layers A and B having the thicknesses e A and e B respectively, and the refractive indices n A and n B respectively, and wherein said stack A n has the following fractal configuration: A.sub.n =A.sub.n-1 B.sub.n-1 A.sub.n-1 B.sub.n-1 A.sub.n-1 where B.sub.n =B.sub.n-1 B.sub.n-1 B.sub.n-1 B.sub.n-1 B.sub.n-1, A.sub.1 =ABABA, B.sub.1 =BBBBB.
Claim 7
Dependent Claim
73 words
Electromagnetic filtering device comprising a stack A n , wherein n is greater than or equal to 2, said stack consisting of layers A and B having the thicknesses e A and e B respectively, and the refractive indices n A and n B respectively, and wherein said stack A n has the following fractal configuration: A.sub.n +A.sub.n-1 B.sub.n-1 A.sub.n-1 B.sub.n-1 A.sub.n-1 wherein B.sub.n =A.sub.n-1 A.sub.n-1 A.sub.n-1 A.sub.n-1 A.sub.n-1, A.sub.1 =ABABA, B.sub.1 =AAAAA.
Claim 8
Dependent Claim
73 words
Electromagnetic filtering device comprising a stack A n , wherein n is greater than or equal to 2, said stack consisting of layers A and B having the thicknesses e A and e B respectively, and the refractive indices n A and n B respectively, and wherein said stack A n has the following fractal configuration: A.sub.n +A.sub.n-1 B.sub.n-1 A.sub.n-1 B.sub.n-1 A.sub.n-1 wherein B.sub.n =A.sub.n-1 A.sub.n-1 A.sub.n-1 A.sub.n-1 A.sub.n-1, A.sub.1 =ABABA, B.sub.1 =AAAAA.
Claim 9
Dependent Claim
71 words
Electromagnetic filtering device comprising a stack A n , wherein n is greater than or equal to 2, said stack consisting of layers A and B having the thicknesses e A and e B respectively, and the refractive indices n A and n B respectively, and wherein said stack A n has the following fractal configuration: A.sub.n =A.sub.n-1 B.sub.n-1 A.sub.n-1 B.sub.n-1 where B.sub.n =B.sub.n-1 B.sub.n-1 B.sub.n-1 B.sub.n-1, A.sub.1 =ABAB, B.sub.1 =BBBB.
Claim 10
Dependent Claim
71 words
Electromagnetic filtering device comprising a stack A n , wherein n is greater than or equal to 2, said stack consisting of layers A and B having the thicknesses e A and e B respectively, and the refractive indices n A and n B respectively, and wherein said stack A n has the following fractal configuration: A.sub.n =A.sub.n-1 B.sub.n-1 A.sub.n-1 B.sub.n-1 where B.sub.n =B.sub.n-1 B.sub.n-1 B.sub.n-1 B.sub.n-1, A.sub.1 =ABAB, B.sub.1 =BBBB.
Claim 11
Dependent Claim
71 words
Electromagnetic filtering device comprising a stack A n , wherein n is greater than or equal to 2, said stack consisting of layers A and B having the thicknesses e A and e B respectively, and the refractive indices n A and n B respectively, and wherein said stack A n has the following fractal configuration: A.sub.n =A.sub.n-1 B.sub.n-1 A.sub.n-1 B.sub.n-1 where B.sub.n =A.sub.n-1 A.sub.n-1 A.sub.n-1 A.sub.n-1, A.sub.1 =ABAB, B.sub.1 =AAAA.
Claim 12
Dependent Claim
71 words
Electromagnetic filtering device comprising a stack A n , wherein n is greater than or equal to 2, said stack consisting of layers A and B having the thicknesses e A and e B respectively, and the refractive indices n A and n B respectively, and wherein said stack A n has the following fractal configuration: A.sub.n =A.sub.n-1 B.sub.n-1 A.sub.n-1 B.sub.n-1 where B.sub.n =A.sub.n-1 A.sub.n-1 A.sub.n-1 A.sub.n-1, A.sub.1 =ABAB, B.sub.1 =AAAA.
Claim 13
Dependent Claim
71 words
Electromagnetic filtering device comprising a stack A n , wherein n is greater than or equal to 2, said stack consisting of layers A and B having the thicknesses e A and e B respectively, and the refractive indices n A and n B respectively, and wherein said stack A n has the following fractal configuration: A.sub.n =A.sub.n-1 A.sub.n-1 B.sub.n-1 B.sub.n-1 where B.sub.n =B.sub.n-1 B.sub.n-1 B.sub.n-1 B.sub.n-1, A.sub.1 =AABB, B.sub.1 =BBBB.
Claim 14
Dependent Claim
71 words
Electromagnetic filtering device comprising a stack A n , wherein n is greater than or equal to 2, said stack consisting of layers A and B having the thicknesses e A and e B respectively, and the refractive indices n A and n B respectively, and wherein said stack A n has the following fractal configuration: A.sub.n =A.sub.n-1 A.sub.n-1 B.sub.n-1 B.sub.n-1 where B.sub.n =B.sub.n-1 B.sub.n-1 B.sub.n-1 B.sub.n-1, A.sub.1 =AABB, B.sub.1 =BBBB.
Claim 15
Dependent Claim
71 words
Electromagnetic filtering device comprising a stack A n , wherein n is greater than or equal to 2, said stack consisting of layers A and B having the thicknesses e A and e B respectively, and the refractive indices n A and n B respectively, and wherein said stack A n has the following fractal configuration: A.sub.n =A.sub.n-1 A.sub.n-1 B.sub.n-1 B.sub.n-1 where B.sub.n =A.sub.n-1 A.sub.n-1 A.sub.n-1 A.sub.n-1, A.sub.1 =AABB, B.sub.1 =AAAA.
Claim 16
Dependent Claim
71 words
Electromagnetic filtering device comprising a stack A n , wherein n is greater than or equal to 2, said stack consisting of layers A and B having the thicknesses e A and e B respectively, and the refractive indices n A and n B respectively, and wherein said stack A n has the following fractal configuration: A.sub.n =A.sub.n-1 A.sub.n-1 B.sub.n-1 B.sub.n-1 where B.sub.n =A.sub.n-1 A.sub.n-1 A.sub.n-1 A.sub.n-1, A.sub.1 =AABB, B.sub.1 =AAAA.
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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) | 1996-09-13 | 1997-03-15 | 1997-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-13 | 2001-03-15 | 2001-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-13 | 2005-03-15 | 2005-09-14 | $7700.00 | Window Closed / Lapsed |