Motion compensated frequency modulated continuous wave 3D coherent imaging ladar with scannerless architecture

Area of Science:

• Optical Engineering
• Remote Sensing
• Imaging Technologies

Background:

• Long dwell coherent imaging ladar (light detection and ranging) systems exhibit significant sensitivity to target or platform motion.
• This motion sensitivity limits their application with nonstatic targets and through atmospheric disturbances.

Purpose of the Study:

• To present a novel motion-compensated frequency modulated continuous wave (FMCW) 3D coherent imaging ladar method.
• To overcome the inherent motion sensitivity of traditional ladar systems.
• To enable imaging of dynamic targets and through refractive turbulence.

Main Methods:

• Development of a scannerless FMCW 3D coherent imaging ladar system.
• Implementation of motion compensation algorithms to mitigate platform or target movement.
• Utilizing high range resolution techniques for detailed imaging.

Main Results:

• Demonstrated significant reduction in motion sensitivity through mathematical analysis.
• Successfully imaged static and dynamic targets, including human faces.
• Achieved high-resolution 3D imaging with up to 600x800 pixels and millimeter range resolution.
• Showcased imaging capabilities through simulated refractive turbulence.

Conclusions:

• The proposed motion-compensated FMCW 3D coherent imaging ladar method effectively overcomes motion sensitivity.
• This technology broadens the applicability of ladar for dynamic scenes and challenging atmospheric conditions.
• The system offers high resolution and scannerless imaging capabilities for advanced 3D ladar applications.