EP0615146A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Monolithic color wheel
Assignee: Texas Instruments Inc
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Filing: 1994-03-02
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Granted: —
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Expires: 2014-03-02
Abstract
Abstract A colour wheel comprised of two or more interference filters deposited on or bonded to a substrate glass disk without the use of a frame or spokes. Filters 32, 34, and 36 preferably abut and are typically made from multiple layers of materials having different indices of refraction. The colour wheel does not require extensive machining or balancing, and is optically efficient because the duration of single colour light periods is maximized. The colour wheel does not have frame or spokes and is therefore more aerodynamically efficient resulting in less work required to spin it and less wind noise.
Inventors
- 👤 Charles Anderson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 19:23
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3102; H04N9/3111; H04N9/3114; G02B; G02B26/00; G02B26/007; G02B26/008; H04N9/30
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
36 words
A colour wheel comprised of: a disk shaped substrate; and at least two filters attached to said disk without the use of a frame or spokes, said filters comprised of at least one optical coating layer.
Claim 2
Dependent Claim
15 words
The colour wheel of claim 1, wherein said filters are vacuum deposited on said disk.
Claim 3
Dependent Claim
23 words
The colour wheel of claim 1, wherein said filters are vacuum deposited on a substrate and said substrate is bonded to said disk.
Claim 4
Dependent Claim
12 words
The colour wheel of any preceding claim, wherein said disk is glass.
Claim 5
Dependent Claim
12 words
The colour wheel of any preceding claim, wherein said filters are reflective.
Claim 6
Dependent Claim
41 words
The colour wheel of any of claims 1 to 4, having three said filters, said filters being transmissive and comprised of layers of materials having different indices of refraction, said materials vacuum deposited on said disk, wherein said disk is glass.
Claim 7
Dependent Claim
55 words
An image display system comprising: a light source for projecting light along a lightpath; a colour wheel according to any preceding claim, on said lightpath for filtering said light; a spatial light modulator on said lightpath for modulating said light; a controller for synchronizing the operation of said colour wheel and said spatial light modulator.
Claim 8
Dependent Claim
16 words
The display system of claim 7, wherein said spatial light modulator is a liquid crystal device.
Claim 9
Dependent Claim
43 words
A camera system comprising: a colour wheel for filtering the light from said source, according to any of claims 1 to 6; a photo-receptor array for detecting said filtered light; a controller for synchronizing the operation of said colour wheel and said photo-receptor.
Claim 10
Dependent Claim
14 words
The camera system of claim 9, wherein said photo-receptor array is a charge-coupled device.
Claim 11
Independent Claim
21 words
The system of any of claims 7 to 9, further comprising a sensor to monitor the position of said colour wheel.
Claim 12
Dependent Claim
31 words
A polygonal mirror, said mirror having reflective optical filters on one or more faces, said filters comprised of at least one optical coating layer, said layer vacuum deposited on said faces.
References Cited (Backward Citations)
No citation records indexed.
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