US4344675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical signal processing device
Assignee: Conexant Systems LLC
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Filing: 1980-05-29
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Granted: 1982-08-17
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Expires: 2000-05-29
Abstract
Abstract An optical system including a radio frequency signal input; a chirp signal input; a source for emitting a beam of radiation; a first acousto-optical modulator disposed in the path of the beam and functioning to modulate the beam with the radio frequency signal to produce a first modulated beam; a second acousto-optical modulator disposed in the path of the first modulated beam to modulate the beam with the chirp signal to produce a third modulated beam; and a single detector disposed in the path of the third modulated beam.
Inventors
- 👤 Shi-Kay Yao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:35
CPC Classifications
G; G06; G06E; G06E3/00; G06E3/001; G06E3/005
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
217 words
An optical system comprising: input means for providing a radio frequency input signal; chirp means for providing a substantially linearly frequency modulated chirp signal of constant amplitude; a source for emitting a beam of radiation; first acousto-optical modulation means disposed in the path of said beam, and connected to said input means and driven by said input signal, said first acousto-optical modulation means functioning to modulate said beam with said radio frequency input signal to produce a first modulated beam; second acousto-optical modulation means disposed in the path of said first modulated beam, and connected to said chirp means and driven by said chirp signal, said acousto-optical modulation means functioning to modulate said beam with said chirp signal to produce a second modulated beam; means for providing a filter signal representing a predetermined filter function to be applied to said input signal; acousto-optical filter means disposed in the path of said second modulated beam and functioning to modulate said beam with said filter signal to produce a third modulated beam; lens means disposed in the path of said third modulated beam for collimating the third modulated beam to produce a fourth collimated modulated beam; and detector means disposed in the path of said fourth modulated beam for detecting the optical intensity distribution at the focal point thereof.
Claim 2
Dependent Claim
217 words
An optical system comprising: input means for providing a radio frequency input signal; chirp means for providing a substantially linearly frequency modulated chirp signal of constant amplitude; a source for emitting a beam of radiation; first acousto-optical modulation means disposed in the path of said beam, and connected to said input means and driven by said input signal, said first acousto-optical modulation means functioning to modulate said beam with said radio frequency input signal to produce a first modulated beam; second acousto-optical modulation means disposed in the path of said first modulated beam, and connected to said chirp means and driven by said chirp signal, said acousto-optical modulation means functioning to modulate said beam with said chirp signal to produce a second modulated beam; means for providing a filter signal representing a predetermined filter function to be applied to said input signal; acousto-optical filter means disposed in the path of said second modulated beam and functioning to modulate said beam with said filter signal to produce a third modulated beam; lens means disposed in the path of said third modulated beam for collimating the third modulated beam to produce a fourth collimated modulated beam; and detector means disposed in the path of said fourth modulated beam for detecting the optical intensity distribution at the focal point thereof.
Claim 3
Dependent Claim
16 words
An optical system as defined in claim 1, wherein said lens means is an acousto-optical lens.
Claim 4
Dependent Claim
17 words
An optical system as defined in claim 1, wherein said lens means is a fixed optical lens.
Claim 5
Dependent Claim
20 words
An optical system as defined in claim 1, wherein said source for emitting a beam of radiation is a laser.
Claim 6
Dependent Claim
16 words
An optical system as defined in claim 1, wherein said detector means comprises a single detector.
Claim 7
Dependent Claim
29 words
An optical system as defined in claim 1, wherein said detector means comprises a detector array in the path of said beam at the focal plane of said lens.
Claim 8
Dependent Claim
21 words
An optical system as defined in claim 1, wherein said acousto-optical filter means is driven in synchronization with the chirp signal.
References Cited (Backward Citations)
US3483387A
Cited
US3539245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-16 | 1986-02-15 | 1986-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-16 | 1990-02-15 | 1990-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-16 | 1994-02-15 | 1994-08-17 | $7700.00 | Window Closed / Lapsed |