US3832543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gated detector synchronization
Assignee: United States Department of the Air Force
•
Filing: 1973-06-04
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Granted: 1974-08-27
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Expires: 1993-06-04
Abstract
Abstract An optical pulse detector apparatus providing remote synchronization of the frequency and phase of the R. F. gate drive signal to the modulated optical input pulse train.
Inventors
- 👤 S Green
- 👤 D Dreisewerd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:07
CPC Classifications
G; G02; G02F; G02F2/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
194 words
An optical pulse detector apparatus comprising in combination: an optical head unit to receive a pulsed laser light beam, said optical head unit converting said pulsed laser light beam into an electrical pulse train signal, and, an electronic control unit comprising in combination: an R. F. drive chain to provide a 1200 MHz sine wave signal to drive said optical head unit, a dynode filter unit to bias and filter the bias voltage to said optical head unit and to sample said electrical pulse train signal, a feedback unit to receive said sampled pulse train signal from said dynode filter unit and to provide an error voltage to said R. F. drive chain, said error voltage controlling the oscillation frequency of said R. F. drive chain, said error voltage controlling the oscillation frequency of said R. F. drive chain, said feedback unit containing a dither oscillator to provide a 1 MHz dither frequency to phase dither said 1200 MHz sine wave signal, said 1200 MHz signal, being thus dithered, containing phase information to provide remote synchronization to said optical head unit, and a power supply unit to provide power to said electronic control unit.
Claim 2
Dependent Claim
194 words
An optical pulse detector apparatus comprising in combination: an optical head unit to receive a pulsed laser light beam, said optical head unit converting said pulsed laser light beam into an electrical pulse train signal, and, an electronic control unit comprising in combination: an R. F. drive chain to provide a 1200 MHz sine wave signal to drive said optical head unit, a dynode filter unit to bias and filter the bias voltage to said optical head unit and to sample said electrical pulse train signal, a feedback unit to receive said sampled pulse train signal from said dynode filter unit and to provide an error voltage to said R. F. drive chain, said error voltage controlling the oscillation frequency of said R. F. drive chain, said error voltage controlling the oscillation frequency of said R. F. drive chain, said feedback unit containing a dither oscillator to provide a 1 MHz dither frequency to phase dither said 1200 MHz sine wave signal, said 1200 MHz signal, being thus dithered, containing phase information to provide remote synchronization to said optical head unit, and a power supply unit to provide power to said electronic control unit.
Claim 3
Dependent Claim
110 words
An optical pulse detector apparatus as described in claim 1 further including an output circuit comprising in combination: a bias insertion unit connected to said optical head unit to monitor said pulse train signal, a threshold detector unit to receive said pulse train signal from said bias insertion unit, said threshold detector unit determining the input level of said pulse train signal, said threshold detector unit comparing said input level with a predetermined reference and providing a logic output signal in response to the comparison of said input level, and an attenuator unit connected to said threshold detector unit to provide an adjustment of said threshold detector input signal level.
Claim 4
Dependent Claim
138 words
An optical pulse detector apparatus as described in claim 1 wherein said feedback unit comprises in combination: a bandpass filter to receive said sampled pulse train signal from said dynode filter unit, said bandpass filter filtering said sampled pulse train signal and providing a filtered output signal, an AGC amplifier to receive said filtered output signal, said AGC amplifier maintaining said filtered output signal at a constant level, said AGC amplifier providing a constant level output signal, a dither oscillator to provide a 1 MHz dither frequency to said RF drive chain, said dither oscillator providing a reference signal, and a syne detector unit receiving said reference signal and said constant level output signal, said sync detector unit comparing said reference signal and said constant level output signal to provide an error signal to said RF drive chain.
References Cited (Backward Citations)
US3341707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |