US 12,253,661 B2
Total internal reflection lens to improve color mixing of an LED light source
Fangxu Dong, Austin, TX (US)
Assigned to Lutron Technology Company LLC, Coopersburg, PA (US)
Filed by Lutron Technology Company LLC, Coopersburg, PA (US)
Filed on Dec. 21, 2023, as Appl. No. 18/392,025.
Application 17/386,486 is a division of application No. 15/000,469, filed on Jan. 19, 2016, granted, now 11,106,025, issued on Aug. 31, 2021.
Application 18/392,025 is a continuation of application No. 18/313,574, filed on May 8, 2023, granted, now 11,885,945.
Application 18/313,574 is a continuation of application No. 17/386,486, filed on Jul. 27, 2021, granted, now 11,681,131, issued on Jun. 20, 2023.
Prior Publication US 2024/0126055 A1, Apr. 18, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 19/00 (2006.01); F21V 5/00 (2018.01)
CPC G02B 19/00 (2013.01) [F21V 5/007 (2013.01); G02B 19/0028 (2013.01); G02B 19/0061 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A lens for receiving light from one or more emitters, comprising:
a concave cylindrical entrance surface rotated about a central axis, wherein the concave cylindrical entrance surface includes:
a sidewall parallel to the central axis; and
planar upper surface perpendicular to the central axis;
a concave spherical exit surface rotated about the central axis; and
a unibody compound parabolic concentrator (CPC) lens rotated about the central axis and disposed between the concave cylindrical entrance surface and the concave spherical exit surface.