Theoretical algorithm and application of a double-integrating sphere system for measuring leaf transmittance and reflectance spectra

Matti Mõttus, Aarne Hovi, Miina Rautiainen

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)563-571
Number of pages9
JournalApplied Optics
Volume56
Issue number3
DOIs
Publication statusPublished - 20 Jan 2017
MoE publication typeA1 Journal article-refereed

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leaves
transmittance
reflectance
ruggedness
spectroradiometers
spectral reflectance
substitutes

Keywords

  • plants (botany)
  • reflection
  • analytical equations
  • diffuse reflectance
  • integrating spheres
  • spectral reflectances
  • spectro-radiometers
  • substitution method
  • theoretical algorithms
  • transmittance and reflectances

Cite this

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abstract = "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.",
keywords = "plants (botany), reflection, analytical equations, diffuse reflectance, integrating spheres, spectral reflectances, spectro-radiometers, substitution method, theoretical algorithms, transmittance and reflectances",
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Theoretical algorithm and application of a double-integrating sphere system for measuring leaf transmittance and reflectance spectra. / Mõttus, Matti; Hovi, Aarne; Rautiainen, Miina.

In: Applied Optics, Vol. 56, No. 3, 20.01.2017, p. 563-571.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Mõttus, Matti

AU - Hovi, Aarne

AU - Rautiainen, Miina

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PY - 2017/1/20

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KW - reflection

KW - analytical equations

KW - diffuse reflectance

KW - integrating spheres

KW - spectral reflectances

KW - spectro-radiometers

KW - substitution method

KW - theoretical algorithms

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