Goniometric characteristics of optical fibres for temperature measurement in diesel engine exhaust filters

Brian J. Boothe; Albert J. Shih; Jian Kong; William L. Roberts

doi:10.1088/0957-0233/14/5/305

Goniometric characteristics of optical fibres for temperature measurement in diesel engine exhaust filters

Brian J. Boothe, Albert J. Shih^*, Jian Kong, William L. Roberts

^*Corresponding author for this work

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

4 Scopus citations

Abstract

The accurate in situ, non-contact measurement of the temperature distribution within diesel after-treatment filters requires the employment of optical fibres with special tip geometry. The goniometric characteristics of optical fibres with flat, 45° angled and bent and polished tips are studied such that the specific radiation acceptance region can be determined. One 2 mm diameter fused silica and two 0.425 mm diameter sapphire optical fibres are examined. Detailed discussion of the relative intensity profiles observed for these fibres is presented. Of the three fibres evaluated, the 45° angled tip geometry provides the most precise response for measuring radiation emitted from the internal filter walls. Exploiting the characteristics of total internal reflection, the 45° angled tip fibre accepts the maximum quantity of incident radiation at an angle perpendicular to the optical axis.

Original language	English (US)
Pages (from-to)	563-572
Number of pages	10
Journal	Measurement Science and Technology
Volume	14
Issue number	5
DOIs	https://doi.org/10.1088/0957-0233/14/5/305
State	Published - May 2003
Externally published	Yes

Keywords

Angled tip
Effective numerical aperture
Goniometric characteristics
Optical fibre

ASJC Scopus subject areas

Instrumentation
Engineering (miscellaneous)
Applied Mathematics

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10.1088/0957-0233/14/5/305

Cite this

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title = "Goniometric characteristics of optical fibres for temperature measurement in diesel engine exhaust filters",

abstract = "The accurate in situ, non-contact measurement of the temperature distribution within diesel after-treatment filters requires the employment of optical fibres with special tip geometry. The goniometric characteristics of optical fibres with flat, 45° angled and bent and polished tips are studied such that the specific radiation acceptance region can be determined. One 2 mm diameter fused silica and two 0.425 mm diameter sapphire optical fibres are examined. Detailed discussion of the relative intensity profiles observed for these fibres is presented. Of the three fibres evaluated, the 45° angled tip geometry provides the most precise response for measuring radiation emitted from the internal filter walls. Exploiting the characteristics of total internal reflection, the 45° angled tip fibre accepts the maximum quantity of incident radiation at an angle perpendicular to the optical axis.",

keywords = "Angled tip, Effective numerical aperture, Goniometric characteristics, Optical fibre",

author = "Boothe, {Brian J.} and Shih, {Albert J.} and Jian Kong and Roberts, {William L.}",

year = "2003",

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doi = "10.1088/0957-0233/14/5/305",

language = "English (US)",

volume = "14",

pages = "563--572",

journal = "Measurement Science and Technology",

issn = "0957-0233",

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TY - JOUR

T1 - Goniometric characteristics of optical fibres for temperature measurement in diesel engine exhaust filters

AU - Boothe, Brian J.

AU - Shih, Albert J.

AU - Kong, Jian

AU - Roberts, William L.

PY - 2003/5

Y1 - 2003/5

N2 - The accurate in situ, non-contact measurement of the temperature distribution within diesel after-treatment filters requires the employment of optical fibres with special tip geometry. The goniometric characteristics of optical fibres with flat, 45° angled and bent and polished tips are studied such that the specific radiation acceptance region can be determined. One 2 mm diameter fused silica and two 0.425 mm diameter sapphire optical fibres are examined. Detailed discussion of the relative intensity profiles observed for these fibres is presented. Of the three fibres evaluated, the 45° angled tip geometry provides the most precise response for measuring radiation emitted from the internal filter walls. Exploiting the characteristics of total internal reflection, the 45° angled tip fibre accepts the maximum quantity of incident radiation at an angle perpendicular to the optical axis.

AB - The accurate in situ, non-contact measurement of the temperature distribution within diesel after-treatment filters requires the employment of optical fibres with special tip geometry. The goniometric characteristics of optical fibres with flat, 45° angled and bent and polished tips are studied such that the specific radiation acceptance region can be determined. One 2 mm diameter fused silica and two 0.425 mm diameter sapphire optical fibres are examined. Detailed discussion of the relative intensity profiles observed for these fibres is presented. Of the three fibres evaluated, the 45° angled tip geometry provides the most precise response for measuring radiation emitted from the internal filter walls. Exploiting the characteristics of total internal reflection, the 45° angled tip fibre accepts the maximum quantity of incident radiation at an angle perpendicular to the optical axis.

KW - Angled tip

KW - Effective numerical aperture

KW - Goniometric characteristics

KW - Optical fibre

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VL - 14

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JO - Measurement Science and Technology

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ER -

Goniometric characteristics of optical fibres for temperature measurement in diesel engine exhaust filters

Abstract

Keywords

ASJC Scopus subject areas

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