[Study on multi-angular polarized spectrum characteristics of leaf based on some indoor experimental data]

Area of Science:

• Plant physiology
• Optical remote sensing

Background:

• Leaf surface structure significantly influences light interaction.
• Polarized reflectance is a sensitive indicator of surface properties.

Purpose of the Study:

• To investigate the multi-angular spectral degree of polarization (DOP) of leaves.
• To explore the relationship between leaf DOP, surface structure, physiological parameters, and observation geometry.

Main Methods:

• Acquisition of multi-angular polarized spectra from three leaf types.
• Calculation of spectral degree of polarization (DOP) using Stokes parameters.

Main Results:

• Leaf surface structure causes differences in DOP values, but general trends are consistent.
• DOP peaks in the specular direction and increases with incident zenith angle.
• Near-infrared bands show better discrimination of geometric configurations, while red bands are more stable with chlorophyll variations.

Conclusions:

• Leaf surface structure and observation geometry are key factors influencing leaf polarized reflectance.
• Spectral DOP analysis provides insights into leaf surface properties and physiological status.