Theoretical algorithm and application of a double-integrating sphere system for measuring leaf transmittance and reflectance spectra
Research output: Contribution to journal › Article › Scientific › peer-review
|Number of pages||9|
|Publication status||Published - 20 Jan 2017|
|MoE publication type||A1 Journal article-refereed|
- VTT Technical Research Centre of Finland
We present the theoretical background and analytical equations for calculating spectral reflectance and transmittance factors for plant leaves from data collected by a field spectroradiometer attached to a double-integrating sphere. The sphere constants required for the calculations are derived from measurements of an empty sample port and a diffuse reflectance panel. The new method is applied in measuring the spectra of leaves belonging to 13 tree species. The greatest advantages of a double-sphere system compared with the conventional single-sphere substitution method is the speed of measurements, ease of operation, and increased portability and field-ruggedness.