Diffractive-optics-based sensor for simultaneous inspection of reflected and transmitted light from porous materials

Raimo Veil Johannes Silvennoinen; Paul Wahl

doi:10.1117/12.347809

7 May 1999 Diffractive-optics-based sensor for simultaneous inspection of reflected and transmitted light from porous materials

Raimo Veil Johannes Silvennoinen, Paul Wahl

Author Affiliations +

Proceedings Volume 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99); (1999) https://doi.org/10.1117/12.347809
Event: Optical Engineering for Sensing and Nanotechnology (ICOSN '99), 1999, Yokohama, Japan

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.

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Raimo Veil Johannes Silvennoinen and Paul Wahl "Diffractive-optics-based sensor for simultaneous inspection of reflected and transmitted light from porous materials", Proc. SPIE 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99), (7 May 1999); https://doi.org/10.1117/12.347809

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