Patent ID: 11921306
Assignee: II-VI DELAWARE, INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 4:
5. The article of claim 1, wherein the diffraction gratings comprises multiple non-empty wavevector subsets of the diffraction gratings, each wavevector subset including those diffraction gratings characterized by a corresponding common grating wavevector that differs from the common grating wavevectors of the other wavevector subsets; wherein within each corresponding wavevector subset, each one of the diffraction gratings of that subset includes diffractive elements that are offset by corresponding offset distances relative to a set of reference grating lines characterized by the common corresponding grating wavevector of the subset, the corresponding displacement of each diffraction grating differing from that of at least one other diffraction grating of the wavevector subset; and wherein the offset distances result in corresponding phase shifts among the corresponding output optical signal beams that in turn result in a far-field intensity distribution of the far-field illumination.