A low cost light diffuser made of metal coil

Nozomi Morita, Tsunenori Arai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We proposed a low cost flexible light diffuser made of metal coil to obtain an appropriate light dose against certain laser therapies in narrow bending organs. We investigated experimentally the diffusion light dose of prototype coils made of stainless steel (sus304). We measured the diffusion light intensity of the prototype coils along the irradiation direction and the circumferential direction with the various pitch distances of the prototype coils and numerical aperture (NA) of laser light beam as the characteristic parameters of the light diffusion. We measured the temperature elevation of the prototype coils to study the waste energy of these prototype coils. The FWHM on the light intensity along the prototype coils marked up to 12.8mm with the constant pitch distance of 0.09mm and the fiber output light NA of 0.038. The FWHM on the light intensity was improved to 13.7mm with the composite pitch distance coils of which the pitch distances were 0.09mm in the proximate and 0.18mm in the distal. Since the efficiency of the diffusion irradiation against the fiber output was typically 7.7% in the prototype coils of which the surface reflectance was 50%, approximately 90% of the laser light energy was transferred to the temperature elevation. We estimated the practical diffusion efficiency around 75% using the high reflection of the prototype coils surface up to 90%.

Original languageEnglish
Title of host publicationProceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08
PublisherIEEE Computer Society
Pages4354-4357
Number of pages4
ISBN (Print)9781424418152
DOIs
Publication statusPublished - 2008
Event30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08 - Vancouver, BC, Canada
Duration: 2008 Aug 202008 Aug 25

Publication series

NameProceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08 - "Personalized Healthcare through Technology"

Other

Other30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08
CountryCanada
CityVancouver, BC
Period08/8/2008/8/25

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Signal Processing
  • Biomedical Engineering
  • Health Informatics

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