US 11,675,120 B2
Optical waveguides for light fixtures and luminaires
Kurt S. Wilcox, Libertyville, IL (US); Christopher D. Strom, Racine, WI (US); Jin Hong Lim, Cary, NC (US); Zongjie Yuan, Libertyville, IL (US); Mark Boomgaarden, Cary, NC (US); Randall Levy Bernard, Durham, NC (US); John W. Durkee, Raleigh, NC (US); Craig D. Raleigh, Burlington, WI (US); and Joseph P. Chobot, State College, PA (US)
Assigned to IDEAL Industries Lighting LLC, Sycamore, IL (US)
Filed by IDEAL Industries Lighting LLC, Racine, WI (US)
Filed on Jun. 14, 2021, as Appl. No. 17/346,700.
Application 16/539,163 is a division of application No. 14/726,152, filed on May 29, 2015, granted, now 10,422,944, issued on Sep. 24, 2019.
Application 15/376,257 is a division of application No. 13/842,521, filed on Mar. 15, 2013, granted, now 9,519,095, issued on Dec. 13, 2016.
Application 17/346,700 is a continuation of application No. 16/937,026, filed on Jul. 23, 2020, granted, now 11,079,079.
Application 16/937,026 is a continuation of application No. 16/937,096, filed on Jul. 23, 2020, granted, now 11,035,527.
Application 16/937,026 is a continuation in part of application No. 16/692,130, filed on Nov. 22, 2019.
Application 16/692,130 is a continuation of application No. 16/539,163, filed on Aug. 13, 2019, granted, now 11,099,317.
Application 16/539,163 is a continuation of application No. 15/710,913, filed on Sep. 21, 2017, granted, now 10,508,794, issued on Dec. 17, 2019.
Application 17/346,700 is a continuation of application No. 15/376,257, filed on Dec. 12, 2016, abandoned.
Application 14/726,152 is a continuation in part of application No. 13/839,949, filed on Mar. 15, 2013, granted, now 9,581,751, issued on Feb. 28, 2017.
Application 14/726,152 is a continuation in part of application No. 13/840,563, filed on Mar. 15, 2013, granted, now 10,436,969, issued on Oct. 8, 2019.
Claims priority of provisional application 61/758,660, filed on Jan. 30, 2013.
Prior Publication US 2021/0311246 A1, Oct. 7, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 6/00 (2006.01); F21V 8/00 (2006.01); F21K 9/61 (2016.01); F21S 8/02 (2006.01); F21V 7/00 (2006.01); G02B 6/24 (2006.01); G02B 6/26 (2006.01); G02B 6/30 (2006.01); G02B 6/32 (2006.01); G02B 6/34 (2006.01)
CPC G02B 6/0076 (2013.01) [F21K 9/61 (2016.08); F21S 8/026 (2013.01); F21V 7/0091 (2013.01); G02B 6/0018 (2013.01); G02B 6/0021 (2013.01); G02B 6/0031 (2013.01); G02B 6/0035 (2013.01); G02B 6/0036 (2013.01); G02B 6/0038 (2013.01); G02B 6/0046 (2013.01); G02B 6/24 (2013.01); G02B 6/262 (2013.01); G02B 6/305 (2013.01); G02B 6/32 (2013.01); G02B 6/34 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An optical waveguide, comprising:
a first waveguide stage comprising:
a first light coupling surface configured to receive light from a light source;
a first light transmission portion; and
a first light extraction portion; and
a second waveguide stage adjacent to and separate from the first waveguide stage, the second waveguide stage comprising:
a second light coupling surface at least partially aligned with the first light coupling surface;
a second light transmission portion; and
a second light extraction portion;
wherein the first and second waveguide stages are configured to provide beam angles in a range of between 10 degrees and 60 degrees.