Patent ID: 9726603
Date: 2017-08-08
CPC Classifications: A61B,G01N

Claim:
1. An apparatus for measuring an amount of a target material provided on a surface of an object, the apparatus comprising: a grating pattern element including a concavo-convex cross-section in which peaks and valleys are periodically arranged and at least one of the peaks and at least one of the valleys comprises an adsorbing material which adsorbs the target material provided on a surface thereof; a light source configured to emit light and irradiate the grating pattern element with the light; a measuring unit configured to measure intensities of diffraction patterns of light diffracted by the grating pattern element; and an information outputter configured to output information indicating the amount of the target material provided on the surface of the object based on the intensities of the diffraction patterns of the diffracted light wherein the information outputter comprises a processor and a software program instructing the processor to calculate a height difference between the peaks and the valleys based on the intensities of the diffraction patterns.