US 12,331,923 B2
Optical member and light source module
Norimasa Yoshida, Komatsushima (JP)
Assigned to NICHIA CORPORATION, Anan (JP)
Filed by NICHIA CORPORATION, Anan (JP)
Filed on May 28, 2024, as Appl. No. 18/675,820.
Claims priority of application No. 2023-089702 (JP), filed on May 31, 2023.
Prior Publication US 2024/0401772 A1, Dec. 5, 2024
Int. Cl. F21V 5/00 (2018.01); F21V 5/04 (2006.01); F21Y 105/16 (2016.01); F21Y 113/00 (2016.01)
CPC F21V 5/007 (2013.01) [F21V 5/04 (2013.01); F21Y 2105/16 (2016.08); F21Y 2113/00 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An optical member comprising:
a plurality of light controllers, each including:
a first surface,
a convex surface that is located opposite to the first surface and is curved in a direction away from the first surface, and
a concave surface that opens at the first surface and is curved from the first surface toward the convex surface, wherein:
a radius of curvature of the concave surface is less than a radius of curvature of the convex surface,
in a plan view, a center of the concave surface coincides with a center of the convex surface, and
a first distance from the first surface to a topmost portion of the convex surface is 4.5 times or more a second distance from the first surface to a deepest portion of the concave surface, and
the first distance is 0.8 mm or more and 16 mm or less, and the second distance is 0.17 mm or more and 3.4 mm or less.