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

Claim 24:
25. The article of claim 1, wherein:
the first solid angle of the far-field illumination is greater than or about equal to 45° in a first dimension by 60° in a second dimension; or
each one of the diffraction gratings is a one-dimensional grating characterized by only a single corresponding wavevector direction; or
each one of the diffraction gratings is a two-dimensional grating characterized by two corresponding wavevector directions that are not parallel with each other;
the operational wavelength range lies within a range from about 0.20 μm to about 10.0 μm; or
the corresponding incident wavelengths are all within about 5.0 nm of a nominal incident wavelength within the operational wavelength range; or
the grating substrate or the diffraction gratings include one or more materials among:
doped or undoped silicon; one or more doped or undoped III-V semiconductors;
doped or undoped silicon oxide, nitride, or oxynitride; one or more doped or undoped metal oxides, nitrides, or oxynitrides; one or more optical glasses; or one or more doped or undoped polymers.