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Proceedings Paper

Diffractive-optics-based sensor for simultaneous inspection of reflected and transmitted light from porous materials
Author(s): Raimo Veil Johannes Silvennoinen; Paul Wahl
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Paper Abstract

Optical reflectance and transmittance of porous material carry information from a surface smoothness and a bulk porosity of a sample. Thus it is of great importance to get simultaneously optical signals connected with the reflected and transmitted light from a porous sample. Previously we have showed that a diffractive optical element (DOE) based sensor is capable to distinguish optical signals, when a scattered wavefront from a sample surface is diffracted through a DOE-aperture, with good agreement compared with the values drawn out by a conventional spectrophotometer. The aim of this paper is to present a DOE based sensor for simultaneous inspection of reflected and transmitted light from porous materials, which are e.g. wood, paper, and pharmaceutical compacts.

Paper Details

Date Published: 7 May 1999
PDF: 4 pages
Proc. SPIE 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99), (7 May 1999); doi: 10.1117/12.347809
Show Author Affiliations
Raimo Veil Johannes Silvennoinen, Univ. of Joensuu (Finland)
Paul Wahl, Univ. of Joensuu (Finland)


Published in SPIE Proceedings Vol. 3740:
Optical Engineering for Sensing and Nanotechnology (ICOSN '99)
Ichirou Yamaguchi, Editor(s)

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