Title:
SYNTHETIC APERTURE LADAR SYSTEM USING INCOHERENT LASER PULSES
Document Type and Number:
WIPO Patent Application WO2003038465
Kind Code:
A3
Abstract:
An incoherent ladar transmitter (12) adapted for use with synthetic aperture processing. The system (12) includes a first mechanism (44, 48, 50) for generating a laser beam (18). A second mechanism (44, 68) records phase information pertaining to the laser beam (18) and subsequently transmits the laser beam (18) from the system in response thereto. A third mechanism (40) receives a reflected version (20) of the laser beam and provides a received signal in response thereto. A fourth mechanism (72) corrects the received signal based on the phase information recorded by the second mechanism (44, 68). In a more specific embodiment, the ladar system (12) includes a synthetic aperture processor (46) for correcting the received signal based on the phase information and providing a corrected laser signal in response thereto. The synthetic aperture processor (46) includes a mechanism (76) for applying a Discrete Fourier Transform (DFT) to the corrected laser signal to obtain high frequency resolution and cross-range resolution. A fifth mechanism (48) constructs a range-Doppler image based on the corrected laser signal and the movement of the ladar system (12).
Inventors:
HALMOS MAURICE J
Application Number:
PCT/US2002/034753
Publication Date:
October 30, 2003
Filing Date:
October 30, 2002
Export Citation:
Assignee:
RAYTHEON CO (US)
International Classes:
G01S17/90; G01S17/18; G01S17/50; (IPC1-7): G01S17/89
Foreign References:
| US5815250A | 1998-09-29 | |||
| US5847817A | 1998-12-08 | |||
| US5889490A | 1999-03-30 | |||
| US5245347A | 1993-09-14 | |||
| US4635060A | 1987-01-06 |
Other References:
GREEN T J ET AL: "SYNTHETIC-APERTURE-RADAT IMAGING WITH A SOLID-STATE LASER", APPLIED OPTICS, OPTICAL SOCIETY OF AMERICA,WASHINGTON, US, vol. 34, no. 30, 20 October 1995 (1995-10-20), pages 6941 - 6949, XP000534310, ISSN: 0003-6935
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