High-resolution setup for measuring wavelength sensitivity of photoyellowing of translucent materials

Anna Vaskuri (Corresponding Author), Petri Kärhä, Anu Heikkilä, Erkki Ikonen

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)

Abstract

Polystyrene and many other materials turn yellow when exposed to ultraviolet (UV) radiation. All photodegradation mechanisms including photoyellowing are functions of the exposure wavelength, which can be described with an action spectrum. In this work, a new high-resolution transmittance measurement setup based on lasers has been developed for measuring color changes, such as the photoyellowing of translucent materials aged with a spectrograph. The measurement setup includes 14 power-stabilized laser lines between 325 nm and 933 nm wavelengths, of which one at a time is directed on to the aged sample. The power transmitted through the sample is measured with a silicon detector utilizing an integrating sphere. The sample is mounted on a high-resolution XY translation stage. Measurement at various locations aged with different wavelengths of exposure radiation gives the transmittance data required for acquiring the action spectrum. The combination of a UV spectrograph and the new high-resolution transmittance measurement setup enables a novel method for studying the UV-induced ageing of translucent materials with a spectral resolution of 3-8 nm, limited by the adjustable spectral bandwidth range of the spectrograph. These achievements form a significant improvement over earlier methods.
Original languageEnglish
Article number103103
Number of pages8
JournalReview of Scientific Instruments
Volume86
Issue number10
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

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Wavelength
Spectrographs
sensitivity
high resolution
transmittance
wavelengths
Ultraviolet spectrographs
spectrographs
Silicon detectors
Lasers
Spectral resolution
Photodegradation
ultraviolet spectrometers
Ultraviolet radiation
radiation dosage
Polystyrenes
Aging of materials
ultraviolet radiation
spectral resolution
lasers

Cite this

Vaskuri, Anna ; Kärhä, Petri ; Heikkilä, Anu ; Ikonen, Erkki. / High-resolution setup for measuring wavelength sensitivity of photoyellowing of translucent materials. In: Review of Scientific Instruments. 2015 ; Vol. 86, No. 10.
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title = "High-resolution setup for measuring wavelength sensitivity of photoyellowing of translucent materials",
abstract = "Polystyrene and many other materials turn yellow when exposed to ultraviolet (UV) radiation. All photodegradation mechanisms including photoyellowing are functions of the exposure wavelength, which can be described with an action spectrum. In this work, a new high-resolution transmittance measurement setup based on lasers has been developed for measuring color changes, such as the photoyellowing of translucent materials aged with a spectrograph. The measurement setup includes 14 power-stabilized laser lines between 325 nm and 933 nm wavelengths, of which one at a time is directed on to the aged sample. The power transmitted through the sample is measured with a silicon detector utilizing an integrating sphere. The sample is mounted on a high-resolution XY translation stage. Measurement at various locations aged with different wavelengths of exposure radiation gives the transmittance data required for acquiring the action spectrum. The combination of a UV spectrograph and the new high-resolution transmittance measurement setup enables a novel method for studying the UV-induced ageing of translucent materials with a spectral resolution of 3-8 nm, limited by the adjustable spectral bandwidth range of the spectrograph. These achievements form a significant improvement over earlier methods.",
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journal = "Review of Scientific Instruments",
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High-resolution setup for measuring wavelength sensitivity of photoyellowing of translucent materials. / Vaskuri, Anna (Corresponding Author); Kärhä, Petri; Heikkilä, Anu; Ikonen, Erkki.

In: Review of Scientific Instruments, Vol. 86, No. 10, 103103, 2015.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - High-resolution setup for measuring wavelength sensitivity of photoyellowing of translucent materials

AU - Vaskuri, Anna

AU - Kärhä, Petri

AU - Heikkilä, Anu

AU - Ikonen, Erkki

PY - 2015

Y1 - 2015

N2 - Polystyrene and many other materials turn yellow when exposed to ultraviolet (UV) radiation. All photodegradation mechanisms including photoyellowing are functions of the exposure wavelength, which can be described with an action spectrum. In this work, a new high-resolution transmittance measurement setup based on lasers has been developed for measuring color changes, such as the photoyellowing of translucent materials aged with a spectrograph. The measurement setup includes 14 power-stabilized laser lines between 325 nm and 933 nm wavelengths, of which one at a time is directed on to the aged sample. The power transmitted through the sample is measured with a silicon detector utilizing an integrating sphere. The sample is mounted on a high-resolution XY translation stage. Measurement at various locations aged with different wavelengths of exposure radiation gives the transmittance data required for acquiring the action spectrum. The combination of a UV spectrograph and the new high-resolution transmittance measurement setup enables a novel method for studying the UV-induced ageing of translucent materials with a spectral resolution of 3-8 nm, limited by the adjustable spectral bandwidth range of the spectrograph. These achievements form a significant improvement over earlier methods.

AB - Polystyrene and many other materials turn yellow when exposed to ultraviolet (UV) radiation. All photodegradation mechanisms including photoyellowing are functions of the exposure wavelength, which can be described with an action spectrum. In this work, a new high-resolution transmittance measurement setup based on lasers has been developed for measuring color changes, such as the photoyellowing of translucent materials aged with a spectrograph. The measurement setup includes 14 power-stabilized laser lines between 325 nm and 933 nm wavelengths, of which one at a time is directed on to the aged sample. The power transmitted through the sample is measured with a silicon detector utilizing an integrating sphere. The sample is mounted on a high-resolution XY translation stage. Measurement at various locations aged with different wavelengths of exposure radiation gives the transmittance data required for acquiring the action spectrum. The combination of a UV spectrograph and the new high-resolution transmittance measurement setup enables a novel method for studying the UV-induced ageing of translucent materials with a spectral resolution of 3-8 nm, limited by the adjustable spectral bandwidth range of the spectrograph. These achievements form a significant improvement over earlier methods.

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M3 - Article

VL - 86

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

SN - 0034-6748

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