Fluorescence lidar multicolor imaging of vegetation

Area of Science:

• Remote Sensing
• Plant Physiology
• Laser Spectroscopy

Background:

• Assessing vegetation health is crucial for ecological monitoring.
• Non-invasive methods for evaluating plant physiological status are needed.

Purpose of the Study:

• To develop and demonstrate a mobile laser-radar system for multicolor vegetation fluorescence imaging.
• To assess the potential of this technology for forest decline research.

Main Methods:

• Utilized a mobile laser-radar system with a Nd:YAG laser transmitter (Raman shifted to 397 nm).
• Employed an image-intensified CCD camera and a Cassegrainian telescope for simultaneous fluorescence imaging in four spectral bands.
• Measured fluorescence spectra using an image-intensified diode array system.

Main Results:

• Successfully acquired multicolor fluorescence images of vegetation at distances up to 50 meters.
• Demonstrated the capability to simultaneously record fluorescence from leaves and branches.
• Obtained fluorescence spectra from selected points within the detection area.

Conclusions:

• Multicolor vegetation fluorescence imaging is feasible at medium distances.
• The developed laser-radar system provides valuable data for assessing vegetation physiological status.
• This technique shows promise for applications in forest decline research and ecological monitoring.