Spectral LADAR: active range-resolved three-dimensional imaging spectroscopy.

Area of Science:

• Optics and Photonics
• Remote Sensing
• Computer Vision

Background:

• LADAR (Light Detection and Ranging) systems are crucial for 3D imaging.
• Multispectral sensing provides material information but is often separate from ranging.
• Camouflaged objects pose a significant challenge for traditional imaging and ranging.

Purpose of the Study:

• To introduce Spectral LADAR, an integrated system for 3D ranging and multispectral imaging.
• To demonstrate the system's capability for material classification and detection of obscured objects.
• To evaluate the system's performance at operational stand-off distances.

Main Methods:

• Development of a Spectral LADAR imager using a pulsed supercontinuum transmitter.
• Implementation of a spectrally multiplexed receiver for 25 discrete spectral bands (1080-1620 nm).
• Utilizing time-of-flight measurements for high-resolution 3D range mapping per spectral band.

Main Results:

• Successful 3D imaging and material classification of various objects.
• Demonstrated effective detection of camouflaged targets at ranges exceeding 40 meters.
• Achieved high-resolution range values across 25 spectral bands.

Conclusions:

• Spectral LADAR effectively integrates 3D ranging with multispectral analysis.
• The system shows significant potential for military imaging and robotic perception, especially for target identification and obscured object detection.
• The use of eye-safe wavelengths enhances its applicability in diverse operational environments.