Patent ID: 9557259
Date: 2017-01-31
CPC Classifications: B01D,G01N

Claim:
1. A particle detector apparatus for optically ascertaining a number of particles arranged on a surface, the particle detector apparatus comprising: a mobile light source configured to emit source light onto the surface, the surface being on a particle filter that includes a membrane that defines a plurality of pores configured to filter the particles from a medium, and at least one subregion of a surface of the membrane which is accessible for the medium includes transparent carbon material having a diamond structure; a spatially resolving light detector; an optical focusing device configured to focus image light that is emitted from the surface in response to the source light onto the spatially resolving light detector, the spatially resolving light detector including light sensors that are configured to measure brightness values based on the image light, such that the spatially resolving light detector is configured to produce image data based on the brightness values delivered by the light sensors; and an evaluation device configured to ascertain the number of particles based on the image data.