CA1327286C
Expired / Lapsed
CA
⏱️ 0.0 years remaining
High reflectance light guide
Assignee: Osram Sylvania Inc
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Filing: 1989-08-21
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Granted: 1994-03-01
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Expires: 2009-08-21
Abstract
Abstract ABSTRACT OF THE DISCLOSURE A light reflector includes a multiplicity of sheets of a first flexible, and substantially transparent material having a first index of refraction, and a first layer thickness, mutually aligned to be substantially parallel, adjacent and separated one from another by layers of a second flexible, and substantially transparent material having a second index of refraction not equal to the first index of refraction, and a second layer thickness. These form a stack of alternating layers to reflect incident light.
Inventors
- 👤 John F. Waymouth
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-10-29 15:27
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/10; G02B6/0001; G02B6/0096
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
80 words
A light reflector comprising: A multiplicity of sheets a of a first flexible, and substantially transparent material having a first index of refraction, and a first layer thickness, mutually aligned to be substantially parallel, adjacent and separated one from another by layers of a second flexible, and substantially transparent material having a second index of refraction not equal to the first index of refraction, and a second layer thickness, to form a stack of alternating layers to reflect incident light.
Claim 2
Dependent Claim
80 words
A light reflector comprising: A multiplicity of sheets a of a first flexible, and substantially transparent material having a first index of refraction, and a first layer thickness, mutually aligned to be substantially parallel, adjacent and separated one from another by layers of a second flexible, and substantially transparent material having a second index of refraction not equal to the first index of refraction, and a second layer thickness, to form a stack of alternating layers to reflect incident light.
Claim 3
Dependent Claim
14 words
The light reflector in claim 1, wherein the number of material layers exceeds two.
Claim 4
Dependent Claim
15 words
The light reflector in claim 1, wherein the layers are arranged concentrically about an axis.
Claim 5
Dependent Claim
15 words
The light reflector in claim 1, wherein the layers are curved concentrically about an axis.
Claim 6
Dependent Claim
18 words
The light reflector in claim 1, wherein the layers are arranged in a circle concentrically about an axis.
Claim 7
Dependent Claim
19 words
The light reflector in claim 1, wherein the index of refraction for the first material is greater than 1.3.
Claim 8
Dependent Claim
13 words
The light reflector in claim 1, wherein the sheets are a plastic material.
Claim 9
Dependent Claim
14 words
The light reflector in claim 7, wherein the sheets are a polyester film material.
Claim 10
Dependent Claim
19 words
The light reflector in claim 1, wherein the sheet thickness is about a 6x10-3 mm to about 0.1 mm.
Claim 11
Dependent Claim
14 words
The light reflector in claim 1, wherein the second layer material is a gas.
Claim 12
Dependent Claim
11 words
The light reflector in claim 1, wherein the gas is air.
Claim 13
Dependent Claim
35 words
The light reflector in claim 10, wherein the first layer material is a plastic material not drawn to a second layer of the same material so as to exclude an intermediate layer of the gas.
Claim 14
Dependent Claim
19 words
The light reflector in claim 1, wherein the first layer thickness is approximately equal to the second layer thickness.
Claim 15
Dependent Claim
37 words
The light reflector in claim 1, wherein the first layer thickness is greater than a wavelength of the longest wavelength light to be reflected, and less than an absorption depth of 1.0% for the first layer material.
Claim 16
Dependent Claim
75 words
A light guide reflector comprising a tube having internally reflective walls enclosing an open central cavity, the wall being composed of multiple layers of transparent plastic film having a single layer thickness less than would absorb one percent of light transiting the layer, and greater than a single wavelength of the transiting light spaced apart by layers of gas having a thickness from approximately a single wavelength of the transiting light to the film thickness.
Claim 17
Dependent Claim
75 words
A light guide reflector comprising a tube having internally reflective walls enclosing an open central cavity, the wall being composed of multiple layers of transparent plastic film having a single layer thickness less than would absorb one percent of light transiting the layer, and greater than a single wavelength of the transiting light spaced apart by layers of gas having a thickness from approximately a single wavelength of the transiting light to the film thickness.
Claim 18
Dependent Claim
23 words
The light reflector in claim 15, wherein the walls have a total thickness of between 10 and 1000 layers of the film material.
Claim 19
Dependent Claim
22 words
The light reflector of claim 16 wherein the wall have total thickness of between 25 and 100 layers of the film material.
Claim 20
Dependent Claim
91 words
A light guide comprising: A multiplicity of layers of a substantially transparent, flexible plastic material having a first index of refraction, and a first sheet thickness, arranged in a curved form concentrically about an axis to define an enclosed cavity, and mutually aligned to be parallel, adjacent and separated one from another by layers of a gas having a second index of refraction, and the second layer thickness being approximately equal to the first layer thickness thereby forming a stack of alternating layers of to reflect light in the defined cavity.
Claim 21
Dependent Claim
91 words
A light guide comprising: A multiplicity of layers of a substantially transparent, flexible plastic material having a first index of refraction, and a first sheet thickness, arranged in a curved form concentrically about an axis to define an enclosed cavity, and mutually aligned to be parallel, adjacent and separated one from another by layers of a gas having a second index of refraction, and the second layer thickness being approximately equal to the first layer thickness thereby forming a stack of alternating layers of to reflect light in the defined cavity.
References Cited (Backward Citations)
No citation records indexed.
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