US 12,222,475 B2
Rotationally shift invariant and multi-layered microlens array
Yuzuru Takashima, Tucson, AZ (US); Brandon Hellman, Tucson, AZ (US); and Joshua Rodriguez, Tucson, AZ (US)
Assigned to ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA, Tucson, AZ (US)
Appl. No. 17/049,428
Filed by Arizona Board of Regents on Behalf of the University of Arizona, Tucson, AZ (US)
PCT Filed Apr. 26, 2019, PCT No. PCT/US2019/029406
§ 371(c)(1), (2) Date Oct. 21, 2020,
PCT Pub. No. WO2019/210208, PCT Pub. Date Oct. 31, 2019.
Claims priority of provisional application 62/663,610, filed on Apr. 27, 2018.
Prior Publication US 2021/0250481 A1, Aug. 12, 2021
Int. Cl. G02B 13/06 (2006.01); G02B 3/00 (2006.01); G02B 17/08 (2006.01); G02B 19/00 (2006.01); H01L 27/146 (2006.01)
CPC G02B 13/06 (2013.01) [G02B 3/0062 (2013.01); G02B 19/008 (2013.01); G02B 19/0085 (2013.01); H01L 27/14627 (2013.01); G02B 3/0056 (2013.01); G02B 17/0856 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A light collection system, comprising:
a first set of one or more microlens array shell structures each having a first array of microlenses, each of the microlens arrays having multi-axis concentrically arranged microlenses that are radially arranged with respect to a center of curvature of the first set;
a second set of one or more microlens array shell structures each having a second array of microlenses, each of the microlens arrays having multi-axis concentrically arranged microlenses that are radially arranged with respect to a center of curvature of the second set, the second set aligned with the first set and the microlenses in the first microlens array and the microlenses in the second microlens array being arranged with respect to one another to thereby define a plurality of radially arranged optical channels between the first set and the second set;
wherein microlenses in the second microlens array capture light from the microlenses in the first microlens array from a 4π steradian field of view and direct the light towards a central location so that the light traverses at least two of the optical channels while advancing towards the central location; and
a light source directed at the one or more microlens array shell structures.