Patent US5870181A successfully refreshed from Google Patents.
US5870181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic optical scanning of linear detector array for laser radar
Assignee: Northrop Grumman Innovation Systems LLC
•
Filing: 1997-10-28
•
Granted: 1999-02-09
•
Expires: 2017-10-28
Abstract
Abstract A laser radar (LADAR) including an acoustic-optical (AO) laser scanner for deflecting a pulsed laser beam through a plurality of angles, means for diffracting the deflected laser beam from the acoustic-optical laser scanner into a plurality of laser beams and a linear detector array including a plurality of detector elements respectively positioned to receive reflected energy from the respective plurality of laser beams such that a line scan is produced composed of a plurality of pixels.
Inventors
- 👤 Clarence C. Andressen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:12
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/48; G01S7/481; G01S7/4817; G01S17/00; G01S17/02; G01S17/06; G01S17/42; G01S7/483; G01S7/484
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
73 words
A scanner, comprising in combination: an acoustic-optical laser scanner for deflecting a pulsed laser beam through a plurality of angles; means for diffracting the deflected laser beam from the acoustic-optical laser scanner into a plurality of laser beams; and a detector array including a plurality of detector elements respectively positioned to receive reflected energy from respective said plurality of laser beams, whereby a line scan is produced composed of a plurality of pixels.
Claim 2
Dependent Claim
73 words
A scanner, comprising in combination: an acoustic-optical laser scanner for deflecting a pulsed laser beam through a plurality of angles; means for diffracting the deflected laser beam from the acoustic-optical laser scanner into a plurality of laser beams; and a detector array including a plurality of detector elements respectively positioned to receive reflected energy from respective said plurality of laser beams, whereby a line scan is produced composed of a plurality of pixels.
Claim 3
Dependent Claim
47 words
The scanner as set forth in claim 1, wherein said deflection of said pulsed laser beam through a plurality of angles by said acoustic-optical laser scanner comprises means for deflecting said pulsed laser beam at a different said angle for different said pulses of said laser beam.
Claim 4
Dependent Claim
46 words
The scanner as set forth in claim 2, wherein said deflecting of said pulsed laser beam at different said angles for different said pulses repetitively occurs until said deflection extends across a length of said detector elements to produce the line scan of closely positioned pixels.
Claim 5
Dependent Claim
35 words
The scanner as set forth in claim 3, further including a scan mirror for sequentially shifting said received reflected energy from respective said plurality of laser beams so as to produce sequential said line scans.
Claim 6
Dependent Claim
36 words
The scanner as set forth in claim 4, wherein alternate said detector elements are slightly offset to allow for continuous coverage and allow for the necessary separation between detectors to prevent shorting and cross coupling energy.
Claim 7
Dependent Claim
23 words
The scanner as set forth in claim 4, wherein multiple of said laser pulses are allowed to occur at the same said angle.
Claim 8
Dependent Claim
20 words
The scanner as set forth in claim 4, wherein said laser pulses do not occur at all of said angles.
Claim 9
Dependent Claim
59 words
A scanning method, comprising the steps of: deflecting a pulsed laser beam through a plurality of angles; diffracting the deflected laser beam into a plurality of laser beams; receiving reflected energy from the respective plurality of laser beams and passing the reflective energy onto respective detector elements, whereby a line scan is produced composed of a plurality of pixels.
Claim 10
Dependent Claim
59 words
A scanning method, comprising the steps of: deflecting a pulsed laser beam through a plurality of angles; diffracting the deflected laser beam into a plurality of laser beams; receiving reflected energy from the respective plurality of laser beams and passing the reflective energy onto respective detector elements, whereby a line scan is produced composed of a plurality of pixels.
Claim 11
Dependent Claim
40 words
The scanning method as set forth in claim 8, wherein the step of deflecting the pulsed laser beam through a plurality of angles comprises deflecting the pulsed laser beam at a different angle for different pulses of the laser beam.
Claim 12
Dependent Claim
46 words
The scanning method as set forth in claim 9, wherein the step of deflecting the pulsed laser beam at different angles for different pulses repetitively occurs until the deflection extends across a length of the detector elements to produce the line scan of closely positioned pixels.
Claim 13
Dependent Claim
33 words
The scanning method as set forth in claim 8, further including the step of sequentially shifting the received reflected energy from respective plurality of laser beams so as to produce sequential line scans.
Claim 14
Dependent Claim
21 words
The scanning method as set forth in claim 8, wherein a multiple of the laser pulses occurs at the same angle.
Claim 15
Dependent Claim
21 words
The scanning method as set forth in claim 8, wherein the laser pulses do not occur at all of the angles.
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) | 2002-02-08 | 2002-08-10 | 2003-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-02-08 | 2006-08-10 | 2007-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-02-08 | 2010-08-10 | 2011-02-09 | $7700.00 | Window Closed / Lapsed |