US 12,326,237 B2
Illumination apparatus
Eri Takeuchi, Yokohama (JP)
Assigned to KYOCERA Corporation, Kyoto (JP)
Appl. No. 18/572,233
Filed by KYOCERA Corporation, Kyoto (JP)
PCT Filed Jun. 23, 2022, PCT No. PCT/JP2022/025147
§ 371(c)(1), (2) Date Dec. 20, 2023,
PCT Pub. No. WO2023/276854, PCT Pub. Date Jan. 5, 2023.
Claims priority of application No. 2021-108719 (JP), filed on Jun. 30, 2021; and application No. PCT/JP2022/006866 (WO), filed on Feb. 21, 2022.
Prior Publication US 2024/0288148 A1, Aug. 29, 2024
Int. Cl. F21V 11/08 (2006.01); F21V 5/00 (2018.01); F21V 5/04 (2006.01)
CPC F21V 11/08 (2013.01) [F21V 5/008 (2013.01); F21V 5/048 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An illumination apparatus, comprising:
a housing including a first opening;
a first light source including a first emission portion to emit first light into an internal space of the housing;
a first lens optical system including at least one first lens between the first emission portion and the first opening in the housing on a path of the first light, the first lens optical system being configured to form an image of the first light from the first emission portion on an imaginary image plane adjacent to the first opening and configured to cause the first light to be emitted through the first opening;
a light reducer configured to absorb reflection-scattering light entering the internal space of the housing, the reflection-scattering light being the first light reflected or scattered, the light reducer is located on an inner wall of the housing; and
at least one shield located on the path of the first light and including a second opening to allow passage of the first light,
wherein:
the first light is partially incident on the at least one shield, and
two outermost beams of the first light on the first emission portion form a smaller angle after passing through the second opening in the at least one shield than before passing through the second opening.