Light scattering of semitransparent sintered polytetrafluoroethylene films

Cited 29 time in webofscience Cited 34 time in scopus
  • Hit : 371
  • Download : 0
Polytetrafluoroethylene (PTFE) is a strongly scattering material and has been regarded to have optical properties similar to biological tissues. In the present study, the bidirectional reflectance distribution function (BRDF) and the bidirectional transmittance distribution function (BTDF) of several PTFE films, with thicknesses from 0.11 to 10 mm, are measured using a laser scatterometer at the wavelength of 635 nm. The directional-hemispherical reflectance (R) and transmittance (T) were obtained by integrating BRDF and BTDF for normal incidence. Comparison of the ratio of the measured R and T with that calculated from the adding-doubling method allows the determination of the reduced scattering coefficient. Furthermore, the effect of surface scattering is investigated by measuring the polarization-dependent BRDF and BTDF at oblique incidence. By analyzing the measurement uncertainty of BTDF in the near-normal observation angles at normal incidence, the present authors found that the scattering coefficient of PTFE should exceed 1200 cm(-1), which is much greater than that of biological tissues. On the other hand, the absorption coefficient of PTFE must be less than 0.01 cm(-1), much smaller than that of biological tissues, a necessary condition to achieve R >= 0.98 with a 10-mm-thick slab. (C) 2008 Society of Photo-Optical Instrumentation Engineers. [DOI: 10.1117/1.2992485]
Publisher
SPIE-SOC PHOTOPTICAL INSTRUMENTATION ENGINEERS
Issue Date
2008
Language
English
Article Type
Article
Keywords

MONTE-CARLO; MULTIPLE-SCATTERING; OPTICAL-PROPERTIES; BIDIRECTIONAL REFLECTANCE; RADIATIVE-TRANSFER; CALIBRATION; SPECTRALON; TISSUES; POWDER; SYSTEM

Citation

JOURNAL OF BIOMEDICAL OPTICS, v.13, no.5

ISSN
1083-3668
DOI
10.1117/1.2992485
URI
http://hdl.handle.net/10203/91107
Appears in Collection
ME-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 29 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0