Patent ID: 6120875
Filing Date: 2000-09-19
Classification: B01D,C12M,Y10S,Y10T

Abstract:
A filtration membrane in the form of a microperforated sheet transparent to wavelengths in the visible and infrared spectrums, the sheet comprising a material transparent in the non-perforated state having perforations with a mean distance l.sub.m between circumferences of neighboring perforations between 5 .mu.m and 100 .mu.m on each face of the material, and having a thickness e of 0.1 to 50 .mu.m wherein the perforations include a perforation diameter d between 0.01 and 15 .mu.m, and a mean angle alpha of inclination through the material between 0.degree. and 10.degree. with respect to an axis perpendicular to the sheet of material.