US3826561A
Expired / Lapsed
US
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Laser pulse tailoring method and means
Assignee: United States Atomic Energy Commission
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Filing: 1973-05-03
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Granted: 1974-07-30
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Expires: 1993-05-03
Abstract
Abstract A method and means for time-tailoring the intensity of focussed laser radiation in the focal region by permitting stepwise shaping in space and time or by providing a continuous pulse shape which are basically accomplished by dividing up and reassembling portions of the laser beam. Stepwise shaping is accomplished by reflector assemblies which divide the pulse and redirect the portions thereof to allow arrival at a selected time and direction. Continuous pulse shaping is accomplished by the combination of a blazed diffraction grating reflector and a paraboloidal reflector, whereby a selected profile can be established to satisfy time intensity of the laser.
Inventors
- 👤 D Gregg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:33
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/09; G02B27/0938; G02B27/0977; G02B27/0911; G02B3/00; G02B5/00; G02B5/18; G02B5/1814
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
107 words
A method for time-tailoring focused laser radiation energy in a focal region comprising the steps of: dividing a beam of radiation energy into a plurality of portions by directing the beam onto a plurality of reflectors comprising a plurality of centrally positioned conical reflectors, and redirecting the thus divided portions to arrive at a specified region at a selected time by positioning a reflective assembly comprising a plurality of radially located different diameter reflecting members with respect to at least a portion of the plurality of conical reflectors for reflecting at least a part of the thus divided portions of the beam onto the specified focal region.
Claim 2
Independent Claim
107 words
A method for time-tailoring focused laser radiation energy in a focal region comprising the steps of: dividing a beam of radiation energy into a plurality of portions by directing the beam onto a plurality of reflectors comprising a plurality of centrally positioned conical reflectors, and redirecting the thus divided portions to arrive at a specified region at a selected time by positioning a reflective assembly comprising a plurality of radially located different diameter reflecting members with respect to at least a portion of the plurality of conical reflectors for reflecting at least a part of the thus divided portions of the beam onto the specified focal region.
Claim 3
Independent Claim
155 words
An apparatus for time-tailoring a laser beam comprising: means for dividing a laser beam into a plurality of portions, and means for reassembling the portions of the beam at a specified region at a selected time, said dividing means comprising a plurality of reflector assemblies, said assemblies being positioned in spaced relation whereby the specified region is defined as a common focal region of at least certain portions of said assemblies, one of said reflector assemblies comprising a plurality of centrally positioned conical reflectors which reflect portions of said beam onto a plurality of radially located reflector members constructed to redirect the reflected portions onto said common focal region, another of said reflector assemblies comprising a plurality of reflector members of different cross-section constructed to reflect portions of said beam onto said common focal region, said last-mentioned reflector members and said radially located reflector members of said one reflector assembly additionally defining said reassembling means.
Claim 4
Independent Claim
155 words
An apparatus for time-tailoring a laser beam comprising: means for dividing a laser beam into a plurality of portions, and means for reassembling the portions of the beam at a specified region at a selected time, said dividing means comprising a plurality of reflector assemblies, said assemblies being positioned in spaced relation whereby the specified region is defined as a common focal region of at least certain portions of said assemblies, one of said reflector assemblies comprising a plurality of centrally positioned conical reflectors which reflect portions of said beam onto a plurality of radially located reflector members constructed to redirect the reflected portions onto said common focal region, another of said reflector assemblies comprising a plurality of reflector members of different cross-section constructed to reflect portions of said beam onto said common focal region, said last-mentioned reflector members and said radially located reflector members of said one reflector assembly additionally defining said reassembling means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |