US5198922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Specularly transmitting and diffuse reflecting optical shutter
Assignee: Individual
•
Filing: 1991-03-19
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Granted: 1993-03-30
•
Expires: 2011-03-19
Abstract
Abstract A diffuse reflecting and specularly transmitting optical shutter structure comprises an optically rough layer of an optically thin optical shutter, and two additional layers disposed on either side of the optical shutter. These two additional layers have refractive indices which approximately match. The surfaces of these two additional layers adjacent to the optical shutter conform to the optically rough surfaces of the optical shutter and the non-adjacent surfaces to the optical shutter of these two additional layers are optically smooth.
Inventors
- 👤 Day Chahroudi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:23
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/02; G02B5/0205; G02B5/021; G02B5/0221; A; A47; A47F; A47F11/00; A47F11/06; B; B60; B60J; B60J3/00; B60J3/007; C; C03; C03C; C03C17/00; C03C17/34; F; F24; F24S; F24S50/00; F24S50/80; G02B5/0273; G02B5/0278; G02B5/0284; Y; Y02; Y02E; Y02E10/00; Y02E10/40
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
73 words
A diffuse reflecting and specularly transmitting optical shutter structure comprising an optically rough layer of optical shutter, and two layers having surfaces disposed on either side of the optical shutter with refractive indices which approximately match the refractive index of the optical shutter, the layer surfaces adjacent to the optical shutter conforming to the optically rough surfaces of the optical shutter and the layer surfaces non-adjacent to the optical shutter being optically smooth.
Claim 2
Dependent Claim
73 words
A diffuse reflecting and specularly transmitting optical shutter structure comprising an optically rough layer of optical shutter, and two layers having surfaces disposed on either side of the optical shutter with refractive indices which approximately match the refractive index of the optical shutter, the layer surfaces adjacent to the optical shutter conforming to the optically rough surfaces of the optical shutter and the layer surfaces non-adjacent to the optical shutter being optically smooth.
Claim 3
Dependent Claim
14 words
The invention of claim 1, wherein said optical shutter defines a harmonic shape surface.
Claim 4
Dependent Claim
18 words
The invention of claim 2, wherein said optical shutter defines facets forming a surface with a zig-zag cross-section.
Claim 5
Dependent Claim
14 words
The invention of claim 1, wherein said optically rough surface defines an etched surface.
Claim 6
Dependent Claim
15 words
The invention of claim 4, wherein the optically rough surface includes a solvent etched polymer.
Claim 7
Dependent Claim
15 words
The invention of claim 4, wherein the optically rough surface includes an acid etched glass.
Claim 8
Dependent Claim
14 words
The invention of claim 1, wherein the optically rough surface includes a crystallized material.
Claim 9
Dependent Claim
14 words
The invention of claim 1, wherein the optically rough surface defines an abraded surface.
Claim 10
Dependent Claim
30 words
The invention of claim 1, wherein one of the two layers on either side of the optical shutter includes a solvent based polymer coating thereby forming an optically smooth surface.
Claim 11
Dependent Claim
29 words
The invention of claim 1, wherein one of the two layers on either side of the optical shutter includes melted liquid borne particles thereby forming an optically smooth surface.
Claim 12
Dependent Claim
29 words
The invention of claim 1, wherein one of the two layers on either side of the optical shutter includes melted gas borne particles thereby forming an optically smooth surface.
Claim 13
Dependent Claim
12 words
The invention of claim 1, wherein the optical shutter is optically thin.
Claim 14
Dependent Claim
68 words
A diffuse reflecting and specularly transmitting optical shutter structure comprising an optically rough layer of optical shutter, and two layers having surfaces disposed on either side of the optical shutter with refractive indices defined to be within 0.20, the layer surfaces adjacent to the optical shutter conforming to the optically rough surfaces of the optical shutter and the non-adjacent layer surfaces to the optical shutter being optically smooth.
Claim 15
Dependent Claim
68 words
A diffuse reflecting and specularly transmitting optical shutter structure comprising an optically rough layer of optical shutter, and two layers having surfaces disposed on either side of the optical shutter with refractive indices defined to be within 0.20, the layer surfaces adjacent to the optical shutter conforming to the optically rough surfaces of the optical shutter and the non-adjacent layer surfaces to the optical shutter being optically smooth.
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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) | 1996-03-29 | 1996-09-28 | 1997-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-03-29 | 2000-09-28 | 2001-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-03-29 | 2004-09-28 | 2005-03-30 | $7700.00 | Window Closed / Lapsed |