Patent ID: 9229208
Filing Date: 2016-01-05
CPC Classification: G02B

Claim Text:
1. An assembly for the generation of a differential interference contrast image (DIC) of an object provided in an object plane in an imaging plane, comprising: (a) a light emitting radiation source; (b) a Köhler illuminating optical assembly for illuminating said object with said light from said radiation source, said Köhler illuminating optical assembly having an illuminating pupil; (c) an objective for imaging an object plane in an imaging plane, wherein said objective is provided with an exit pupil and an entrance pupil, and wherein said entrance pupil of said objective is positioned in said illuminating pupil of said Köhler illuminating optical assembly; and (d) a component for the generation of an interference of light waves; characterized in that (e) said component for the generation of said interference of light waves is positioned in said exit pupil of said objective, and (f) said component for the generation of said interference of light waves is formed by an amplitude filter with an amplitude transmission factor F wherein x,y: coordinates in said exit pupil plane F t(x,y): variable, real portion of said amplitude transmission factor of said amplitude filter with T(x,y): Transmission degree of said amplitude filter (if F* F φ: azimuth direction angle of the effect of the DIC in said exit pupil plane P(x,y): phase distribution of said amplitude filter with F P T P