US3724924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple focusing device
Assignee: Alcatel Lucent SAS
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Filing: 1970-12-23
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Granted: 1973-04-03
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Expires: 1990-12-23
Abstract
Abstract A multiple focusing device for radiation made up of a plurality of right prisms each having a corresponding end or base cut and polished to form a spherical cap producing a focal point for the incident radiation, the plurality of prisms being grouped so that the focal points produced thereby fall within a plane transverse to the incident radiation.
Inventors
- 👤 R Lenfant
- 👤 G Petitjean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:37
CPC Classifications
B; B23; B23K; B23K26/00; B23K26/02; B23K26/06; B23K26/067; B23K26/0676; G; G01; G01J; G01J1/00; G01J1/02; G01J1/04; G01J1/0407; G01J1/0411; G01J1/0477; G02; G02B; G02B27/00; G02B27/10; G02B27/12; G02B27/123; G02B5/00; G02B5/005
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
108 words
A multiple focusing device comprising a plurality of elementary object lenses cut in a transparent material, characterized in that each of the elementary object lenses is provided as a prism of geometric cross section one of the bases of which has the shape of a spherical cap having a diameter substantially equal to the diagonal of the cross section of said prism and being centered on the axis of said prism, said prisms being joined by means of the lateral surfaces thereof and each prism having a length at least equal to the focal length of the lens formed by the spherical surface of said one base thereof.
Claim 2
Dependent Claim
108 words
A multiple focusing device comprising a plurality of elementary object lenses cut in a transparent material, characterized in that each of the elementary object lenses is provided as a prism of geometric cross section one of the bases of which has the shape of a spherical cap having a diameter substantially equal to the diagonal of the cross section of said prism and being centered on the axis of said prism, said prisms being joined by means of the lateral surfaces thereof and each prism having a length at least equal to the focal length of the lens formed by the spherical surface of said one base thereof.
Claim 3
Dependent Claim
20 words
A multiple focusing device according to claim 1, characterized in that the prisms are cut in monocrystals of lithium fluoride.
Claim 4
Dependent Claim
36 words
A multiple focusing device according to claim 1, characterized in that the focal length of each of the elementary object lenses are such that the focal points thereof are distributed in the form of a curve.
Claim 5
Dependent Claim
20 words
A multiple focusing device according to claim 1, characterized in that each of said prisms in a right regular prism.
Claim 6
Dependent Claim
46 words
Multiple focusing device according to claim 1, further coming at least one additional elementary object lens formed by a right prism of which the entry face has the form of a convex cylindrical surface with an axis substantially perpendicular to the direction of the incident beam.
Claim 7
Dependent Claim
37 words
Multiple focusing device according to claim 5 characterized in that the focal length of the said additional object lens with a cylindrical entry face is equal to that of the other elementary object lenses of the device.
Claim 8
Dependent Claim
61 words
Multiple focusing device according to claim 6 characterized in that the said additional elementary object lens has in a transverse plane a size equal to that of at least two of said elementary object lenses having a spherical entry face, these later being aligned along one or other of the axes of the matrix forming the transverse section of the device.
Claim 9
Dependent Claim
68 words
Multiple focusing device according to claim 1, characterized in that at least one of the said elementary object lenses has a transverse channel cut in at least one of the lateral faces thereof, the transverse section which remains facing the said groove having the form of a rectangle, of which the two small sides are replaced by semi-circles with a diameter equal to the width of the rectangle.
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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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |