Patent US3845298A successfully refreshed from Google Patents.
US3845298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical scanning device
Assignee: Thales Optronics Ltd
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Filing: 1973-10-05
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Granted: 1974-10-29
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Expires: 1993-10-05
Abstract
Abstract An optical scanning device for composing a visual image of an infrared scene comprises a rotating body in the form of a drum carrying a plurality of pairs of orthogonal planar mirrors arranged such that for each mirror pair the line of intersection of the planes defined by the mirrors is disposed at right angles to the axis of rotation of the drum and tangential to a cylinder having its axis coincident with the drum rotation axis. The radiation detector is elongate and extends parallel to the drum rotation axis and when fixedly located midway between the drum rotation axis and the circumference of said cylinder a flat field is scanned independently of the rate of scan.
Inventors
- 👤 H Runciman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:23
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/02; H04N3/08; H04N3/09
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
156 words
An optical scanning device comprising an elongate detector, optical means for receiving radiation to be scanned, said optical means being arranged to direct said radiation along a radiation path to said detector, said detector and optical means each being fixedly mounted on a support, a plurality of optical members mounted to rotate around an axis which is parallel to the axis of the detector sequentially to complete the radiation path between said optical means and said detector and adapted to scan radiation emanating from the optical means and to relay scanned radiation to the input of the detector, each said optical member comprises two planar reflecting surfaces disposed substantially at right angles to each other, the line of intersection of the planes defined by said two planar reflecting surfaces being disposed at right angles to said axis of rotation, the lines of intersection for each of the optical members being equidistant from the axis of rotation.
Claim 2
Dependent Claim
156 words
An optical scanning device comprising an elongate detector, optical means for receiving radiation to be scanned, said optical means being arranged to direct said radiation along a radiation path to said detector, said detector and optical means each being fixedly mounted on a support, a plurality of optical members mounted to rotate around an axis which is parallel to the axis of the detector sequentially to complete the radiation path between said optical means and said detector and adapted to scan radiation emanating from the optical means and to relay scanned radiation to the input of the detector, each said optical member comprises two planar reflecting surfaces disposed substantially at right angles to each other, the line of intersection of the planes defined by said two planar reflecting surfaces being disposed at right angles to said axis of rotation, the lines of intersection for each of the optical members being equidistant from the axis of rotation.
Claim 3
Dependent Claim
38 words
A device according to claim 1, wherein said planar reflecting surfaces in each optical member are formed by a roof prism, the apices of the roof prisms for the optical members being equidistant from the axis of rotation.
Claim 4
Dependent Claim
41 words
A device according to claim 1, wherein said optical members are mounted on a supporting member having an open portion, the optical members being mounted around the periphery of said open portion and the detector being located within the open portion.
Claim 5
Dependent Claim
29 words
A device according to claim 1, wherein said optical members are mounted around the periphery of a supporting member and the detector being located externally of said supporting member.
Claim 6
Dependent Claim
18 words
A device according to claim 3, wherein said optical means comprises a focussing lens and a planar reflector.
Claim 7
Dependent Claim
14 words
A device according to claim 4, wherein said optical means comprises a focussing lens.
References Cited (Backward Citations)
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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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |