US 12,078,788 B2
Variable magnification afocal telescope element
Jay Small, Vancouver, WA (US); Zhigang Chen, Portland, OR (US); and Manoj Kanskar, Portland, OR (US)
Assigned to nLIGHT, Inc., Camas, WA (US)
Appl. No. 17/634,914
Filed by nLIGHT, Inc., Camas, WA (US)
PCT Filed Aug. 14, 2020, PCT No. PCT/US2020/046443
§ 371(c)(1), (2) Date Feb. 11, 2022,
PCT Pub. No. WO2021/030721, PCT Pub. Date Feb. 18, 2021.
Claims priority of provisional application 62/886,912, filed on Aug. 14, 2019.
Claims priority of provisional application 62/886,907, filed on Aug. 14, 2019.
Prior Publication US 2022/0382028 A1, Dec. 1, 2022
Int. Cl. G02B 19/00 (2006.01); G02B 6/42 (2006.01); G02B 27/09 (2006.01); G02B 27/30 (2006.01); H01S 5/02315 (2021.01); H01S 5/40 (2006.01)
CPC G02B 19/0014 (2013.01) [G02B 6/4206 (2013.01); G02B 19/0057 (2013.01); G02B 27/0905 (2013.01); G02B 27/30 (2013.01); H01S 5/02315 (2021.01); H01S 5/4012 (2013.01); H01S 5/4025 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a transmissive optical substrate configured to receive a plurality of laser beams propagating along respective parallel beam axes at respective initial beam displacements with respect to an optical axis of the transmissive optical substrate, and configured to produce laser output beams having reduced displacements, wherein the transmissive optical substrate includes first and second surfaces with respective first and second curvatures defined to increase an output beam magnification for an increasing input beam displacement from the optical axis,
wherein at least one of the first and second curvatures is hyperbolic.