Applications of Radiometric Measurements in Non-Contact Thermometry and Mesopic Photometry: Dissertation

Maksim Shpak

Research output: ThesisDissertationCollection of Articles

Abstract

Radiometry deals with the measurement of electromagnetic radiation, its power and spectral and spatial distributions. Radiometric measurement techniques find use in many practical applications, including the measurement of visible light and its colour in photometry, measurement of temperature in pyrometry, chemical composition and physical properties in spectroscopy. The two main focus areas in this thesis are the non-contact measurement of temperature of a microscopic object and the practical application of mesopic photometry. The subject in the study of the non-contact temperature measurement was a silicon microbridge emitter. The temperature of the microbridge was determined from its radiance spectrum in the visible and near-infrared regions. In contrast to previous studies, a grey body assumption was not used, and the determination of temperature was done by modelling spectral emissivity of the multi-layered structure of the microbridge. To accurately model the emissivity, the optical properties of the silicon at high temperatures were studied, which was not previously done for silicon with high doping concentrations. The extinction coefficient was determined from the radiance of a test sample placed in a furnace. Mesopic photometry is a relatively new technique for measuring light, which takes into account the change of visual response in the overlapping region between the so-called day and night visions in the human eye. In this thesis, a novel dual channel photometer developed and characterised for the measurements in the mesopic luminance range is presented. The recommended system for mesopic photometry was published by the International Commission on Illumination (CIE) in 2010, and it provides mathematical tools for calculating mesopic quantities. The CIE mesopic system was studied in detail for this thesis and its applicability was analysed for all possible conditions in the mesopic range. Two problem areas were discovered at the edges of the mesopic range, where the mathematical model either did not converge or exhibited discontinuity. As a practical solution, a set of parameterised equations is presented that provides closed-form solutions and continuous transitions, with minimal deviation from the CIE system.
Original languageEnglish
QualificationDoctor Degree
Awarding Institution
  • Aalto University
Supervisors/Advisors
  • Ikonen, Erkki, Supervisor
  • Kärhä, Petri, Advisor, External person
Award date16 Sep 2016
Place of PublicationEspoo
Publisher
Print ISBNs978-952-60-6977-7, 978-951-38-8452-9
Electronic ISBNs978-952-60-6978-4, 978-951-38-8453-6
Publication statusPublished - 2016
MoE publication typeG5 Doctoral dissertation (article)

Fingerprint

photometry
temperature measurement
theses
radiance
emissivity
silicon
night vision
temperature
luminance
furnaces
photometers
mathematical models
discontinuity
electromagnetic radiation
spatial distribution
chemical composition
emitters
extinction
physical properties
illumination

Keywords

  • radiometry
  • pyrometry
  • non-contact temperature
  • microbridge
  • microglow
  • silicon
  • extinction coefficient
  • photometry
  • mesopic
  • luminance

Cite this

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title = "Applications of Radiometric Measurements in Non-Contact Thermometry and Mesopic Photometry: Dissertation",
abstract = "Radiometry deals with the measurement of electromagnetic radiation, its power and spectral and spatial distributions. Radiometric measurement techniques find use in many practical applications, including the measurement of visible light and its colour in photometry, measurement of temperature in pyrometry, chemical composition and physical properties in spectroscopy. The two main focus areas in this thesis are the non-contact measurement of temperature of a microscopic object and the practical application of mesopic photometry. The subject in the study of the non-contact temperature measurement was a silicon microbridge emitter. The temperature of the microbridge was determined from its radiance spectrum in the visible and near-infrared regions. In contrast to previous studies, a grey body assumption was not used, and the determination of temperature was done by modelling spectral emissivity of the multi-layered structure of the microbridge. To accurately model the emissivity, the optical properties of the silicon at high temperatures were studied, which was not previously done for silicon with high doping concentrations. The extinction coefficient was determined from the radiance of a test sample placed in a furnace. Mesopic photometry is a relatively new technique for measuring light, which takes into account the change of visual response in the overlapping region between the so-called day and night visions in the human eye. In this thesis, a novel dual channel photometer developed and characterised for the measurements in the mesopic luminance range is presented. The recommended system for mesopic photometry was published by the International Commission on Illumination (CIE) in 2010, and it provides mathematical tools for calculating mesopic quantities. The CIE mesopic system was studied in detail for this thesis and its applicability was analysed for all possible conditions in the mesopic range. Two problem areas were discovered at the edges of the mesopic range, where the mathematical model either did not converge or exhibited discontinuity. As a practical solution, a set of parameterised equations is presented that provides closed-form solutions and continuous transitions, with minimal deviation from the CIE system.",
keywords = "radiometry, pyrometry, non-contact temperature, microbridge, microglow, silicon, extinction coefficient, photometry, mesopic, luminance",
author = "Maksim Shpak",
note = "BA1172",
year = "2016",
language = "English",
isbn = "978-952-60-6977-7",
series = "VTT Science",
publisher = "Aalto University",
number = "134",
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}

Applications of Radiometric Measurements in Non-Contact Thermometry and Mesopic Photometry : Dissertation. / Shpak, Maksim.

Espoo : Aalto University, 2016. 91 p.

Research output: ThesisDissertationCollection of Articles

TY - THES

T1 - Applications of Radiometric Measurements in Non-Contact Thermometry and Mesopic Photometry

T2 - Dissertation

AU - Shpak, Maksim

N1 - BA1172

PY - 2016

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N2 - Radiometry deals with the measurement of electromagnetic radiation, its power and spectral and spatial distributions. Radiometric measurement techniques find use in many practical applications, including the measurement of visible light and its colour in photometry, measurement of temperature in pyrometry, chemical composition and physical properties in spectroscopy. The two main focus areas in this thesis are the non-contact measurement of temperature of a microscopic object and the practical application of mesopic photometry. The subject in the study of the non-contact temperature measurement was a silicon microbridge emitter. The temperature of the microbridge was determined from its radiance spectrum in the visible and near-infrared regions. In contrast to previous studies, a grey body assumption was not used, and the determination of temperature was done by modelling spectral emissivity of the multi-layered structure of the microbridge. To accurately model the emissivity, the optical properties of the silicon at high temperatures were studied, which was not previously done for silicon with high doping concentrations. The extinction coefficient was determined from the radiance of a test sample placed in a furnace. Mesopic photometry is a relatively new technique for measuring light, which takes into account the change of visual response in the overlapping region between the so-called day and night visions in the human eye. In this thesis, a novel dual channel photometer developed and characterised for the measurements in the mesopic luminance range is presented. The recommended system for mesopic photometry was published by the International Commission on Illumination (CIE) in 2010, and it provides mathematical tools for calculating mesopic quantities. The CIE mesopic system was studied in detail for this thesis and its applicability was analysed for all possible conditions in the mesopic range. Two problem areas were discovered at the edges of the mesopic range, where the mathematical model either did not converge or exhibited discontinuity. As a practical solution, a set of parameterised equations is presented that provides closed-form solutions and continuous transitions, with minimal deviation from the CIE system.

AB - Radiometry deals with the measurement of electromagnetic radiation, its power and spectral and spatial distributions. Radiometric measurement techniques find use in many practical applications, including the measurement of visible light and its colour in photometry, measurement of temperature in pyrometry, chemical composition and physical properties in spectroscopy. The two main focus areas in this thesis are the non-contact measurement of temperature of a microscopic object and the practical application of mesopic photometry. The subject in the study of the non-contact temperature measurement was a silicon microbridge emitter. The temperature of the microbridge was determined from its radiance spectrum in the visible and near-infrared regions. In contrast to previous studies, a grey body assumption was not used, and the determination of temperature was done by modelling spectral emissivity of the multi-layered structure of the microbridge. To accurately model the emissivity, the optical properties of the silicon at high temperatures were studied, which was not previously done for silicon with high doping concentrations. The extinction coefficient was determined from the radiance of a test sample placed in a furnace. Mesopic photometry is a relatively new technique for measuring light, which takes into account the change of visual response in the overlapping region between the so-called day and night visions in the human eye. In this thesis, a novel dual channel photometer developed and characterised for the measurements in the mesopic luminance range is presented. The recommended system for mesopic photometry was published by the International Commission on Illumination (CIE) in 2010, and it provides mathematical tools for calculating mesopic quantities. The CIE mesopic system was studied in detail for this thesis and its applicability was analysed for all possible conditions in the mesopic range. Two problem areas were discovered at the edges of the mesopic range, where the mathematical model either did not converge or exhibited discontinuity. As a practical solution, a set of parameterised equations is presented that provides closed-form solutions and continuous transitions, with minimal deviation from the CIE system.

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KW - pyrometry

KW - non-contact temperature

KW - microbridge

KW - microglow

KW - silicon

KW - extinction coefficient

KW - photometry

KW - mesopic

KW - luminance

M3 - Dissertation

SN - 978-952-60-6977-7

SN - 978-951-38-8452-9

T3 - VTT Science

PB - Aalto University

CY - Espoo

ER -