US4089582A
Expired / Lapsed
US
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Narrow band reflection polarizer
Assignee: Siemens AG
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Filing: 1975-08-18
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Granted: 1978-05-16
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Expires: 1995-08-18
Abstract
Abstract The invention discloses a wave guide structure utilizing a narrow band reflection polarizer comprising a substrate and a multiple layer dielectric for a generally incident unpolarized electromagnetic wave of wavelength λ 1 in the ultraviolet, visible, and infrared regions. The dielectric layers comprise a medium having an index of refraction n o , and at least two layers deposited by vaporization of material having alternatively high and low indices of refraction, n 2 and n 1 , respectively. The layers having the high and low refractive indices exhibit the same effective optic layer thickness equal to (1/4) (j+1) λ 1 , where j = even integers, for the refractive index structure n s (n 1 , n 2 ) k n o , or n s (n 1 , n 2 ) k n 1 n o and n 1 = index of refraction of the first layer connected to the medium, n 2 = index of refraction of the second layer connected serially to the first layer, and k = 0, 1, 2, . . . The resulting reflected wave is polarized parallel or vertically to the plane of incidence.
Inventors
- 👤 Hans Mahlein
- 👤 Gerhard Winzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:55
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/26; G02B6/27; G02B6/2726; G02B6/2733; G02B6/10; G02B6/12; G02B6/12007; G02B6/126; G02B6/2753; G02B6/2766; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/035; G02B2006/12083; G02B2006/12102
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
193 words
A waveguide structure for masking out specific polarization conditions of a light ray of predetermined frequency utilizing a narrow band reflection polarizer, comprising: a substrate; a planar waveguide layer applied onto said substrate, said waveguide having an index of refraction, n o ; a narrow bandwidth reflection polarizer applied onto said waveguide layer, said polarizer comprising a dielectric multilayer adjacent said waveguide layer and an absorbant glass plate having an index of refraction n s adjacent said dielectric multilayer; said dielectric multilayer being comprised of two alternating layers, one layer having an index of refraction n 1 , the other layer having an index of refraction n 2 , with n o <n 1 , n 1 <n 2 and n s >n 1 ; said layers having the same effective optic layer thickness equal to odd integrals of 1/4λ 1 , wherein λ 1 is a wavelength of an incident unpolarized electromagnetic wave selected from the range extending from the ultraviolet through infrared regions, traveling through said waveguide layer; and said waveguide structure having a refractive index structure defined by: n.sub.s (n.sub.1, n.sub.2).sup.k n.sub.o, wherein K = 1,2,3, . . . .
Claim 2
Dependent Claim
193 words
A waveguide structure for masking out specific polarization conditions of a light ray of predetermined frequency utilizing a narrow band reflection polarizer, comprising: a substrate; a planar waveguide layer applied onto said substrate, said waveguide having an index of refraction, n o ; a narrow bandwidth reflection polarizer applied onto said waveguide layer, said polarizer comprising a dielectric multilayer adjacent said waveguide layer and an absorbant glass plate having an index of refraction n s adjacent said dielectric multilayer; said dielectric multilayer being comprised of two alternating layers, one layer having an index of refraction n 1 , the other layer having an index of refraction n 2 , with n o <n 1 , n 1 <n 2 and n s >n 1 ; said layers having the same effective optic layer thickness equal to odd integrals of 1/4λ 1 , wherein λ 1 is a wavelength of an incident unpolarized electromagnetic wave selected from the range extending from the ultraviolet through infrared regions, traveling through said waveguide layer; and said waveguide structure having a refractive index structure defined by: n.sub.s (n.sub.1, n.sub.2).sup.k n.sub.o, wherein K = 1,2,3, . . . .
Claim 3
Dependent Claim
193 words
A waveguide structure for masking out specific polarization conditions of a light ray of predetermined frequency utilizing a narrow band reflection polarizer, comprising: a substrate; a planar waveguide layer applied onto said substrate, said waveguide having an index of refraction, n o ; a narrow bandwidth reflection polarizer applied onto said waveguide layer, said polarizer comprising a dielectric multilayer adjacent said waveguide layer and an absorbant glass plate having an index of refraction n s adjacent said dielectric multilayer; said dielectric multilayer being comprised of two alternating layers, one layer having an index of refraction n 1 , the other layer having an index of refraction n 2 , with n o <n 1 , n 1 <n 2 and n s >n 1 ; said layers having the same effective optic layer thickness equal to odd integrals of 1/4λ 1 , wherein λ 1 is a wavelength of an incident unpolarized electromagnetic wave selected from the range extending from the ultraviolet through infrared regions, traveling through said waveguide layers; and said waveguide structure having a refractive index structure defined by: n.sub.s (n.sub.1, n.sub.2).sup.k n.sub.1 n.sub.o, wherein K = 1,2,3, . . .
Claim 4
Dependent Claim
193 words
A waveguide structure for masking out specific polarization conditions of a light ray of predetermined frequency utilizing a narrow band reflection polarizer, comprising: a substrate; a planar waveguide layer applied onto said substrate, said waveguide having an index of refraction, n o ; a narrow bandwidth reflection polarizer applied onto said waveguide layer, said polarizer comprising a dielectric multilayer adjacent said waveguide layer and an absorbant glass plate having an index of refraction n s adjacent said dielectric multilayer; said dielectric multilayer being comprised of two alternating layers, one layer having an index of refraction n 1 , the other layer having an index of refraction n 2 , with n o <n 1 , n 1 <n 2 and n s >n 1 ; said layers having the same effective optic layer thickness equal to odd integrals of 1/4λ 1 , wherein λ 1 is a wavelength of an incident unpolarized electromagnetic wave selected from the range extending from the ultraviolet through infrared regions, traveling through said waveguide layers; and said waveguide structure having a refractive index structure defined by: n.sub.s (n.sub.1, n.sub.2).sup.k n.sub.1 n.sub.o, wherein K = 1,2,3, . . .
References Cited (Backward Citations)
DE2252826A1
Cited
US3905676A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-15 | 1981-11-14 | 1982-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-15 | 1985-11-14 | 1986-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-15 | 1989-11-14 | 1990-05-16 | $7700.00 | Window Closed / Lapsed |