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

Claim 18:
19. The article of claim 18, wherein:
(i) each period of the first repeating pattern comprises a monotonic variation of the magnitudes of the corresponding grating wavevectors and (ii) each period of the second repeating pattern comprises a monotonic variation of the directions of the corresponding grating wavevectors; or
(i) each period of the first repeating pattern comprises a monotonic variation of the magnitudes of the corresponding grating wavevectors and (ii) each period of the second repeating pattern comprises a non-monotonic or irregular variation of the directions of the corresponding grating wavevectors; or
(i) each period of the first repeating pattern comprises a non-monotonic or irregular variation of the magnitudes of the corresponding grating wavevectors and (ii) each period of the second repeating pattern comprises a monotonic variation of the directions of the corresponding grating wavevectors; or
(i) each period of the first repeating pattern comprises a non-monotonic or irregular variation of the magnitudes of the corresponding grating wavevectors and (ii) each period of the second repeating pattern comprises a non-monotonic or irregular variation of the directions of the corresponding grating wavevectors.