Patent US3881810A successfully refreshed from Google Patents.
US3881810A
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Large field light modulator
Assignee: Lockheed Martin Corp
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Filing: 1973-11-12
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Granted: 1975-05-06
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Expires: 1993-11-12
Abstract
Abstract Apparatus for modulating extended sources of light comprises in one embodiment first and second cylindrical lens arrays disposed back-to-back and moved relative to each other.
Inventors
- 👤 Angelo A Colao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:34
CPC Classifications
G; G02; G02B; G02B26/00; G02B26/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
84 words
A modulator for an extended radiation source, comprising: a lens array disposed outside the radiation source to concentrate the radiation to form a predetermined energy distribution pattern, the curved surface of said lens array facing the radiation source; means disposed outside said lens array for modulating said energy distribution pattern said modulated energy distribution pattern being radiated through said modulating means at certain positions thereof relative to said lens array; and means for causing relative motion between said lens array and said modulating means.
Claim 2
Dependent Claim
84 words
A modulator for an extended radiation source, comprising: a lens array disposed outside the radiation source to concentrate the radiation to form a predetermined energy distribution pattern, the curved surface of said lens array facing the radiation source; means disposed outside said lens array for modulating said energy distribution pattern said modulated energy distribution pattern being radiated through said modulating means at certain positions thereof relative to said lens array; and means for causing relative motion between said lens array and said modulating means.
Claim 3
Dependent Claim
27 words
A modulator as defined in claim 1 wherein: said lens array includes a sheet of transparent material of predetermined height having an array of lenses arranged thereon.
Claim 4
Dependent Claim
16 words
A modulator as defined in claim 2 wherein: said lenses are integral with said transparent sheet.
Claim 5
Dependent Claim
18 words
A modulator as defined in claim 2, said transparent sheet leaving opaque portions spaced along the length thereof.
Claim 6
Dependent Claim
12 words
A modulator as defined in claim 1 wherein: said lenses are cylindrical.
Claim 7
Dependent Claim
23 words
A modulator as defined in claim 1 wherein: said modulating means includes a second lens array arranged back-to-back with said first lens array.
Claim 8
Dependent Claim
23 words
A modulator as defined in claim 1 wherein: said modulating means includes a transparent member having a plurality of opaque area spaced thereon.
Claim 9
Dependent Claim
18 words
A modulator as defined in claim 1 wherein: said modulating means includes an opaque member leaving slots therein.
Claim 10
Dependent Claim
32 words
A modulator as defined in claim 1 wherein: said modulating means is disposed relative to said lens array such that the spacing between said modulating means and said lens array is minimized.
References Cited (Backward Citations)
US1686525A
Cited
US3421805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |