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

Matti Mõttus; Aarne Hovi; Miina Rautiainen

doi:10.1364/AO.56.000563

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

Matti Mõttus, Aarne Hovi, Miina Rautiainen

Aalto University

Research output: Contribution to journal › Article › Scientific › peer-review

16 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 language	English
Pages (from-to)	563-571
Journal	Applied Optics
Volume	56
Issue number	3
DOIs	https://doi.org/10.1364/AO.56.000563
Publication status	Published - 20 Jan 2017
MoE publication type	A1 Journal article-refereed

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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10.1364/AO.56.000563

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

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",

author = "Matti M{\~o}ttus and Aarne Hovi and Miina Rautiainen",

note = "Funding Information: Project code: 113325 Funding: Suomen Akatemia (266152, 286390) Suomen Akatemia (266152, 286390). We thank Mr. Pekka Raitio (Aalto University, Department of Built Environment) for participation in the measurement campaign and Dr. Antti Penttil{\"a} (University of Helsinki, Department of Physics) for providing the diffuse reflectance standards. Publisher Copyright: {\textcopyright} 2017 Optical Society of America.",

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doi = "10.1364/AO.56.000563",

language = "English",

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journal = "Applied Optics",

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T1 - Theoretical algorithm and application of a double-integrating sphere system for measuring leaf transmittance and reflectance spectra

AU - Mõttus, Matti

AU - Hovi, Aarne

AU - Rautiainen, Miina

N1 - Funding Information: Project code: 113325 Funding: Suomen Akatemia (266152, 286390) Suomen Akatemia (266152, 286390). We thank Mr. Pekka Raitio (Aalto University, Department of Built Environment) for participation in the measurement campaign and Dr. Antti Penttilä (University of Helsinki, Department of Physics) for providing the diffuse reflectance standards. Publisher Copyright: © 2017 Optical Society of America.

PY - 2017/1/20

Y1 - 2017/1/20

N2 - 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.

AB - 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.

KW - plants (botany)

KW - reflection

KW - analytical equations

KW - diffuse reflectance

KW - integrating spheres

KW - spectral reflectances

KW - spectro-radiometers

KW - substitution method

KW - theoretical algorithms

KW - transmittance and reflectances

UR - http://www.scopus.com/inward/record.url?scp=85010204708&partnerID=8YFLogxK

U2 - 10.1364/AO.56.000563

DO - 10.1364/AO.56.000563

M3 - Article

SN - 1559-128X

VL - 56

SP - 563

EP - 571

JO - Applied Optics

JF - Applied Optics

IS - 3

ER -

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

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Keywords

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