US3725733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrafast multiple flashlamp
Assignee: United States Department of the Navy
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Filing: 1971-04-19
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Granted: 1973-04-03
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Expires: 1991-04-19
Abstract
Abstract There is disclosed a control system for firing a plurality of flashlamps so as to produce high intensity light pulses with ultrafast rise times for pumping laser systems wherein a resonant circuit is utilized to develop maximum voltage across the flashlamps at a time corresponding to their breakdown delay time.
Inventors
- 👤 M Mack
- 👤 R Mongeon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:27
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/30; H05B41/32
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
193 words
Apparatus for producing high intensity light pulses with ultrafast rise times comprising, in combination, a plurality of gaseous discharge lamps; a resistor connected across each lamp; a pair of capacitors connected in an electrical series relationship across each of said lamps; a source of DC supply voltage having one side connected to a reference potential and the other side connected to the junction of each pair of capacitors; means for connecting one side of each lamp to said reference potential whereby each of said capacitors is initially charged to a voltage level corresponding to the magnitude of said DC supply source; and an inductance and a switching device in series between the junction of each pair of capacitors and said reference potential whereby whenever said switching device is triggered to a low impedance condition both of said capacitors commence to discharge, with one of said capacitors discharging at a low rate because its discharge path includes said resistor, and the other capacitor rapidly discharging and thereafter being reversibly charged so that the voltage across each discharge lamp increases to approximately twice the magnitude of said DC supply source and each lamp is fired.
Claim 2
Dependent Claim
193 words
Apparatus for producing high intensity light pulses with ultrafast rise times comprising, in combination, a plurality of gaseous discharge lamps; a resistor connected across each lamp; a pair of capacitors connected in an electrical series relationship across each of said lamps; a source of DC supply voltage having one side connected to a reference potential and the other side connected to the junction of each pair of capacitors; means for connecting one side of each lamp to said reference potential whereby each of said capacitors is initially charged to a voltage level corresponding to the magnitude of said DC supply source; and an inductance and a switching device in series between the junction of each pair of capacitors and said reference potential whereby whenever said switching device is triggered to a low impedance condition both of said capacitors commence to discharge, with one of said capacitors discharging at a low rate because its discharge path includes said resistor, and the other capacitor rapidly discharging and thereafter being reversibly charged so that the voltage across each discharge lamp increases to approximately twice the magnitude of said DC supply source and each lamp is fired.
Claim 3
Dependent Claim
55 words
In an arrangement as defined in claim 1 wherein the magnitude of said inductance and the magnitude of that capacitor of said pair which rapidly discharges when said switching device is triggered to a low impedance condition are such that the resonant frequency thereof corresponds to the ionization delay time of the gas discharge lamps.
Claim 4
Dependent Claim
40 words
In an arrangement as defined in claim 1 wherein said switching device is a gas discharge tube that is fired by a trigger pulse and the radiation produced contributes to the pre-ionization of the gas in the gas discharge lamps.
Claim 5
Dependent Claim
31 words
In an arrangement as defined in claim 1 wherein all of said plurality of said gas discharge lamps are arranged in a cylindrical configuration so as to accommodate a lasing medium.
References Cited (Backward Citations)
US3480876A
Cited
US3544840A
Cited
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 |