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

Claim 0:
1. An optical imaging system comprising:
a solid transparent substrate having a first flat surface and a second opposing flat surface;
a primary reflective region located on the first flat surface, the primary reflective region having a central opening;
a secondary reflective region located on the second flat surface, wherein at least one of the primary and secondary reflective regions comprises an optical metasurface, the optical metasurface having structures that are smaller than a wavelength of image-forming rays for the optical imaging system;
wherein image-forming rays are imaged between a first conjugate and a second conjugate; the first conjugate is located to a same side of the substrate as the first flat surface; the second conjugate is located to a same side of the substrate 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; and
at least one of (a) a primary baffle located between a first ray bundle and a second ray bundle, the first ray bundle comprising image-forming rays propagating between the central opening and the secondary reflective region, and the second ray bundle comprising image-forming rays propagating between the secondary reflective region and the primary reflective region; and (b) a secondary baffle located between the second ray bundle and a third ray bundle, the third ray bundle comprising image-forming rays propagating between the primary reflective region and the second flat surface.