Patent ID: 11947265
Assignee: CARL ZEISS SMT GMBH
Field: Optics (Instruments)
Classification: CPC G  H | IPC G

Claim 0:
1. An optical diffraction component, comprising:
a periodic grating structure profile comprising diffraction structures,
wherein:
each diffraction structure has exactly a first diffraction structure level, a second diffraction structure level and a third diffraction structure level;
the first diffraction structure level is equal to a reference plane;
the second diffraction structure level is above the reference plane;
the third diffraction structure level is below the reference plane;
the first, second and third diffraction structure levels define a topography of a grating period of the grating structure profile;
the grating period repeats regularly along a period running direction;
along the period running direction, the first diffraction structure level extends less than 50% of the grating period;
the diffraction structures are configured so that, during use of the optical diffraction component, a wavelength range around two different target wavelengths diffracted by the periodic grating structure profile comprises radiation components with three different phases that interfere destructively with one another;
a difference between the two different target wavelengths is less than 50%; and
the two target wavelengths differ by at least 1%.