Patent ID: 8319971

Claim:
A scatterfield microscopical measuring apparatus, comprising: a light source module, for providing a light field; an objective lens module, being configured with a back focal plane and being disposed at a side of a sample to be inspected; a spatial light modulator, disposed on an optical path defined between the light source module and the sample, comprising a plurality of modulation cells, wherein by controlling the light transmittance of each modulation cell, the spatial light modulator is configured to act as a simulated Fresnel lens for modulating an optical characteristic of the light field provided from the light source module to form a first beam focusing on the back focal plane while enabling the first beam to project on the sample where it is reflected back as a second beam focusing on the back focal plane; and a detector, for recording an optical image formed on the back focal plane in response to the second beam, wherein a center of the simulated Fresnel lens in the spatial light modulator is changed so as to change the focusing position of the first beam on the back focal plane so that an illumination angle of the first beam upon the sample is going to change accordingly.