US 11,054,723 B2
Illumination device
Toshiki Miyakawa, Yokohama (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on May 11, 2020, as Appl. No. 16/871,563.
Claims priority of application No. JP2019-093735 (JP), filed on May 17, 2019.
Prior Publication US 2020/0363700 A1, Nov. 19, 2020
Int. Cl. F21V 29/83 (2015.01); F21V 29/67 (2015.01); G03B 15/05 (2021.01); F21V 5/04 (2006.01); F21V 14/02 (2006.01); F21V 29/507 (2015.01)
CPC G03B 15/05 (2013.01) [F21V 5/045 (2013.01); F21V 14/02 (2013.01); F21V 29/83 (2015.01); F21V 29/507 (2015.01); G03B 2215/0521 (2013.01); G03B 2215/0567 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An illumination device comprising:
a first light source configured to include a discharge tube;
a first optical member configured to transmit light emitted from the first light source;
a second optical member placed between the first light source and the first optical member and configured to transmit the light emitted from the first light source;
an air-movement mechanism configured to be arranged between a first space and a second space and move air between the first space and the second space, wherein the first space is an inner space of the illumination device that is nearer to the first light source than the second optical member, and the second space is a space between the first optical member and the second optical member; and
a second light source different from the first light source,
wherein a member included in a flow path of the air-movement mechanism is thermally connected to the second light source.