US 12,169,285 B2
Low-profile color-mixing lightpipe
Carlton S. Jones, Boxford, MA (US); Robert A. Gobron, Southborough, MA (US); and Anthony L. Bolzan, Boxford, MA (US)
Assigned to Fraen Corporation, Reading, MA (US)
Filed by Fraen Corporation, Reading, MA (US)
Filed on Feb. 12, 2024, as Appl. No. 18/439,535.
Application 18/439,535 is a continuation in part of application No. 17/511,182, filed on Oct. 26, 2021, granted, now 11,899,219.
Application 17/511,182 is a continuation of application No. 16/717,500, filed on Dec. 17, 2019, granted, now 11,156,847, issued on Oct. 26, 2021.
Application 16/717,500 is a continuation of application No. 16/021,942, filed on Jun. 28, 2018, granted, now 10,585,292, issued on Mar. 10, 2020.
Prior Publication US 2024/0288704 A1, Aug. 29, 2024
Int. Cl. G02B 27/09 (2006.01); G02B 6/122 (2006.01); G02B 15/14 (2006.01)
CPC G02B 27/0994 (2013.01) [G02B 6/122 (2013.01); G02B 15/142 (2019.08); G02B 27/0955 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A light-mixing system comprising:
a light pipe comprising:
an input surface configured for receiving light from a light source;
a light-mixing segment optically coupled to the input surface; and
an output surface optically coupled to the light-mixing segment, and configured such that at least a portion of the light received at the input surface exits the light pipe through the output surface,
wherein:
the light-mixing segment includes a first section and a second section,
the second section is optically coupled to the first section,
the first section has a circular cross section, and
the second section has a polygonal cross section.