Patent ID: 11953707
Assignee: PURDUE RESEARCH FOUNDATION
Field: Other special machines (Mechanical engineering)
Classification: CPC G  B | IPC B  G

Claim 7:
8. A multi-layer lens, comprising:
a plurality of dual-layer structures staked on top of one-another, wherein each dual-layer Ri of the plurality of dual-layers includes i) a first curable material having a height of ZLi cured at a predetermined curing level CA, and ii) a second curable material having a height of Zgi cured at a predetermined curing level CB, wherein the multi-layer lens is configured to diffract light incident thereon, and wherein if light is incident on a first multi-layer lens such that the diffracted light from the first multi-layer lens is configured to be incident on a second multi-layer lens, the diffract light from the first multi-layer lens and the diffract light from the second multi-layer lens are configured to be discriminateable so as to determine angular relationship between the diffracted light from the first multi-layer lens and the diffracted light from the second multi-layer lens to thereby determine the rotational relationship between the first multi-layer lens and the second multi-layer lens.