US 12,352,408 B2
3-D optics with beam forming features
Nadarajah Narendran, Clifton Park, NY (US); and Ukwatte Lokuliyanage Indika Upendra Perera, Clifton Park, NY (US)
Assigned to Rensselaer Polytechnic Institute, Troy, NY (US)
Appl. No. 17/413,623
Filed by RENSSELAER POLYTECHNIC INSTITUTE, Troy, NY (US)
PCT Filed Dec. 13, 2019, PCT No. PCT/US2019/066200
§ 371(c)(1), (2) Date Jun. 14, 2021,
PCT Pub. No. WO2020/123924, PCT Pub. Date Jun. 18, 2020.
Claims priority of provisional application 62/779,704, filed on Dec. 14, 2018.
Claims priority of provisional application 62/885,212, filed on Aug. 10, 2019.
Claims priority of provisional application 62/947,035, filed on Dec. 12, 2019.
Prior Publication US 2022/0034482 A1, Feb. 3, 2022
Int. Cl. F21V 13/04 (2006.01); B33Y 80/00 (2015.01); F21V 5/04 (2006.01); F21V 5/08 (2006.01)
CPC F21V 13/04 (2013.01) [B33Y 80/00 (2014.12); F21V 5/04 (2013.01); F21V 5/08 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A three-dimensional (3-D) optic for beam shaping, the 3-D optic comprising:
a first surface configured to receive incident light;
a second surface positioned relative to the first surface, the second surface configured to emit a light beam, the emitted light beam having a shape; and
a beam forming feature, the emitted beam shape related to the beam forming feature, the beam forming feature formed by a 3-D manufacturing process, the beam forming feature comprising an internal structure positioned between the first surface and the second surface, the internal structure corresponding to a void or comprising a material having an optical property different from an optical property of a surrounding region, each optical property selected from the group comprising a refractive index, an absorption characteristic and a reflection characteristic, wherein a dimension of the beam forming feature is at least twice a maximum wavelength of the incident light.