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

Claim 0:
1. A method for manufacturing a diffraction grating lens, comprising:
a) depositing a layer of a curable material to a height of ZL;
b) curing the layer of step (a) to a predetermined curing level CA;
c) depositing a layer of the curable material to a height of Zgi atop the cured layer of step (b);
d) curing the layer of step (c) to a predetermined curing level CB; and
e) repeating steps (a) through (d) in a bottom up manner forming a lens having a thickness t, wherein each combination of the layers of step (a) and step (c) forms a multi-layer lens having a 3-dimensional rectangular-like shape Ri of the lens having a depth constituting the thickness t of the lens, 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.