US 12,189,141 B2
Multi-order diffractive Fresnel lens (MOD-DFL) and systems that incorporate the MOD-DFL
Thomas D. Milster, Tucson, AZ (US); Daniel Apai, Tucson, AZ (US); and Lee C. Johnson, Tucson, AZ (US)
Assigned to ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA, Tucson, AZ (US)
Appl. No. 17/256,044
Filed by Arizona Board of Regents on Behalf of the University of Arizona, Tucson, AZ (US)
PCT Filed Jun. 28, 2019, PCT No. PCT/US2019/039829
§ 371(c)(1), (2) Date Dec. 24, 2020,
PCT Pub. No. WO2020/006411, PCT Pub. Date Jan. 2, 2020.
Claims priority of provisional application 62/691,892, filed on Jun. 29, 2018.
Prior Publication US 2021/0190998 A1, Jun. 24, 2021
Int. Cl. G02B 5/18 (2006.01); G01J 3/02 (2006.01); G01J 3/12 (2006.01); G02B 3/08 (2006.01)
CPC G02B 3/08 (2013.01) [G01J 3/0208 (2013.01); G01J 3/0297 (2013.01); G01J 3/12 (2013.01); G02B 5/1876 (2013.01); G01J 2003/1208 (2013.01); G01J 2003/1213 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A spectroscopy system comprising:
a sensor;
a deployment device; and
a multi-order diffractive Fresnel lens (MOD-DFL) comprising a plurality of MOD-DFL segments secured to a mounting surface of the deployment device in a preselected arrangement to form the MOD-DFL on the mounting surface, wherein the preselected arrangement of the plurality of MOD-DFL segments forms a MOD-DFL surface profile comprising N transitions in a top surface of a MOD-DFL array at N radial positions, respectively, from a center axis of the MOD-DFL array, where N is a positive integer that is greater than or equal to 2, each of the transitions occurring at a respective zone boundary and having a step height in a direction nearly parallel to the center axis, where spectral components of illumination of the MOD-DFL are distributed across a direction in space on the sensor.