Patent ID: 11927836
Assignee: TECTUS CORPORATION
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 19:
20. A method for manufacturing wafer level optics comprising:
forming an arrayof primary reflective regions on a first flat surface of a solid transparent wafer, each primary reflective region having a central opening;
forming an array of corresponding secondary reflective regions located on a second opposing flat surface of the solid transparent wafer, wherein at least one of the primary and secondary reflective regions comprises optical metasurfaces;
forming at least one of (a) an array of primary baffles located between first ray bundles and second ray bundles, the first ray bundles comprising image-forming rays propagating between the central openings and the secondary reflective regions, and the second ray bundles comprising image-forming rays propagating between the secondary reflective regions and the primary reflective regions; and (b) an arrayof secondary baffles located between the second ray bundles and third ray bundles, the third ray bundles comprising image-forming rays propagating between the primary reflective regions and the second flat surfaces; and
dicing the solid transparent wafer into individual dies, each die containing a pair of corresponding primary and secondary reflective regions;
wherein for each pair of corresponding primary and secondary reflective regions: image-forming rays are imaged between a first conjugate and a second conjugate; the first conjugate is located to a same side of the wafer as the first flat surface; the second conjugate is located to a same side of the wafer as the second flat surface; and the image-forming rays propagate from the first conjugate through the central opening to the secondary reflective region to the primary reflective region to the second conjugate, either along a forward direction or along a reverse direction.