Low density fibrous material surface light reflectance analysis

Abstract

The light based surface finishing of most product measurement is an important feature in the industries. In this paper, a lab fabricated tester for investigation on the quality of low density paper which was represent by tissue paper was done. Laser light is used as a light source to distinguish the quality of density paper and the light reflectance element was used. The photodiode was used as sensing element to detect the reflected light from the surface of tissue paper. The both of laser diode and photodiode were placed in a light box. The laser was used to emit light on the sample and the photodiode detects light intensity from the surface specimen in the light box. Different level of intensity correlates to different voltage output. The investigation on the different type of tissue paper including of high quality and low quality were done respectively. The result showed that the total ply high quality of low density paper has a higher reflected voltage output compared to low quality.