US3765769A
Expired / Lapsed
US
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Dynamic spectroscopy of picosecond pulses
Assignee: RTX Corp
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Filing: 1972-04-26
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Granted: 1973-10-16
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Expires: 1992-04-26
Abstract
Abstract A device for producing a dynamic spectrogram of a picosecond pulse of electromagnetic radiation is described. A technique for recording the component wavelengths and their relative intensity as a function of time for the pulse is also discussed.
Inventors
- 👤 E Treacy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:20
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/28; G01J3/2889
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
87 words
Apparatus for producing a spectrogram of an picosecond pulse of collimated electromagnetic radiation comprising: means for dispersing the ultrashort pulse into a plurality of component pulses each of which has a characteristic wavelength and travels in a direction determined by the wavelength, means for reducing the duration of the component pulses to a value which is less than the duration of the picosecond pulse; means for focusing the component pulses; and means for recording the relative arrival of each component pulse with respect to a reference plane.
Claim 2
Dependent Claim
87 words
Apparatus for producing a spectrogram of an picosecond pulse of collimated electromagnetic radiation comprising: means for dispersing the ultrashort pulse into a plurality of component pulses each of which has a characteristic wavelength and travels in a direction determined by the wavelength, means for reducing the duration of the component pulses to a value which is less than the duration of the picosecond pulse; means for focusing the component pulses; and means for recording the relative arrival of each component pulse with respect to a reference plane.
Claim 3
Dependent Claim
18 words
The invention according to claim 1 wherein the means for dispersing the picosecond pulse is a diffraction grating.
Claim 4
Dependent Claim
21 words
The invention according to claim 1 wherein the means for reducing the duration of the individual pulses is a stepped mirror.
Claim 5
Independent Claim
83 words
A method of producing a spectrogram of an picosecond pulse of collimated electromagnetic radiation including the steps of: dispersing the picosecond pulse into a plurality of component pulses each of which has a characTeristic wavelength and travels in a direction determined by the wavelength; reducing the duration of the component pulses to a value which is less than the duration of the picosecond pulse; focusing the component pulses; and recording the relative arrival of each component pulse with respect to a reference plane.
Claim 6
Independent Claim
83 words
A method of producing a spectrogram of an picosecond pulse of collimated electromagnetic radiation including the steps of: dispersing the picosecond pulse into a plurality of component pulses each of which has a characTeristic wavelength and travels in a direction determined by the wavelength; reducing the duration of the component pulses to a value which is less than the duration of the picosecond pulse; focusing the component pulses; and recording the relative arrival of each component pulse with respect to a reference plane.
References Cited (Backward Citations)
US3459466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |