US3796826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multispectral camera
Assignee: Spar Aerospace Products Ltd
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Filing: 1972-03-08
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Granted: 1974-03-12
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Expires: 1992-03-08
Abstract
Abstract A multispectral camera device according to the present invention consists of a high resolution lens, sensing means capable of converting photon energy into electrical energy and wedge interference filter means disposed between the lens means and the sensing means. The sensing means being disposed to read the image transmitted by the wedge interference filter means.
Inventors
- 👤 H Kerr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:29
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/89; H01J31/00; H01J31/08; H01J31/26; H01J31/28; H01J31/34; H01J31/36; H01J31/48; H04; H04N; H04N23/00; H04N23/80; H01J2229/00; H01J2229/89; H01J2229/893
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
159 words
A camera device of improved resolution operative to provide image information for a narrow wavelength passband selectible within a wide band of wavelengths comprising, high resolution lens means, a wedge interference filter, and sensing means capable of converting photon energy into electrical energy in response to scanning displacements in directions across the field of said lens means and said wedge interference filter, said interference filter and said sensing means being each located substantially in a focal plane of the lens means so that the lens means is substantially focused onto said sensing means and onto said wedge interference filter, said wedge interference filter being disposed between said lens means and said sensing means and oriented so that the wedge interference filter provides transmission at a constant wavelength with displacement in a first direction across the wedge interference filter and a transmission which is continuously variable in wavelength with displacement in a second perpendicular direction across the wedge interference filter.
Claim 2
Dependent Claim
159 words
A camera device of improved resolution operative to provide image information for a narrow wavelength passband selectible within a wide band of wavelengths comprising, high resolution lens means, a wedge interference filter, and sensing means capable of converting photon energy into electrical energy in response to scanning displacements in directions across the field of said lens means and said wedge interference filter, said interference filter and said sensing means being each located substantially in a focal plane of the lens means so that the lens means is substantially focused onto said sensing means and onto said wedge interference filter, said wedge interference filter being disposed between said lens means and said sensing means and oriented so that the wedge interference filter provides transmission at a constant wavelength with displacement in a first direction across the wedge interference filter and a transmission which is continuously variable in wavelength with displacement in a second perpendicular direction across the wedge interference filter.
Claim 3
Dependent Claim
22 words
A multispectral camera device as claimed in claim 1 wherein said sensing means comprises image dissector tube means having a photo cathode.
Claim 4
Dependent Claim
18 words
A multispectral camera device as claimed in claim 1 wherein said sensing means comprises a television camera tube.
Claim 5
Dependent Claim
87 words
A selectible passband camera device as claimed in claim 1 wherein said lens means comprises, first lens means disposed outwardly from said wedge interference filter and focusing an image on said wedge interference filter, relay lens means disposed between said wedge interference filter and said sensing means focusing the wedge interference filter onto said sensing means, and field lens means disposed between said first lens and said relay lens and closely adjacent said wedge interference filter to image the first lens means onto said relay lens means.
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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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |