Invention Grant
US07986397B1 FMCW 3-D LADAR imaging systems and methods with reduced Doppler sensitivity
有权
FMCW 3-D LADAR成像系统和具有降低的多普勒灵敏度的方法
- Patent Title: FMCW 3-D LADAR imaging systems and methods with reduced Doppler sensitivity
- Patent Title (中): FMCW 3-D LADAR成像系统和具有降低的多普勒灵敏度的方法
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Application No.: US12113126Application Date: 2008-04-30
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Publication No.: US07986397B1Publication Date: 2011-07-26
- Inventor: Bruce G. Tiemann , Brian Krause
- Applicant: Bruce G. Tiemann , Brian Krause
- Applicant Address: US CO Louisville
- Assignee: Lockheed Martin Coherent Technologies, Inc.
- Current Assignee: Lockheed Martin Coherent Technologies, Inc.
- Current Assignee Address: US CO Louisville
- Agency: McDermott Will & Emery LLP
- Main IPC: G01C3/08
- IPC: G01C3/08

Abstract:
A method for frequency modulated continuous wave LADAR imaging is provided. The method comprises the steps of generating a chirped laser signal and a constant-frequency laser signal, forming a target laser signal from the chirped laser signal and the constant-frequency laser signal and forming a local oscillator laser signal from the chirped laser signal and the constant-frequency laser signal. The method further comprises delaying or frequency shifting the local oscillator laser signal and directing the target laser signal to a target. The method further comprises combining a returned signal received from the target with the delayed or frequency shifted local oscillator laser signal to form a combined received signal, and capturing the combined received signal with a plurality of image sensors. The method further comprises performing a nonlinear operation on the captured combined received signal and Fourier transforming the captured combined received signal to determine a range corresponding to each of the plurality of image sensors in the imaging device.
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