US 12,354,866 B2
Microwave excitation light-source device
Akira Inoue, Tokyo (JP); Seiro Yuge, Tokyo (JP); Koji Ota, Tokyo (JP); and Akane Nomura, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Appl. No. 18/689,703
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Sep. 17, 2021, PCT No. PCT/JP2021/034380
§ 371(c)(1), (2) Date Mar. 6, 2024,
PCT Pub. No. WO2023/042388, PCT Pub. Date Mar. 23, 2023.
Prior Publication US 2025/0132143 A1, Apr. 24, 2025
Int. Cl. H01J 61/32 (2006.01); H01J 61/06 (2006.01); H01J 61/42 (2006.01); H01J 65/04 (2006.01)
CPC H01J 61/32 (2013.01) [H01J 61/06 (2013.01); H01J 61/42 (2013.01); H01J 65/042 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A microwave excitation light-source device, comprising:
a center conductor extending in an axis direction; an annular conductor having light transparency and disposed concentrically with respect to the center conductor;
an arc tube in which a luminescent material is enclosed, said arc tube being disposed so as to extend along the axis direction in an annular space created between the center conductor and the annular conductor; and
a support unit that supports the center conductor, the annular conductor and the arc tube and in which electrical connection paths for applying microwaves to the center conductor and the annular conductor are formed;
wherein the arc tube is configured so that, in a plane that is perpendicular to the axis direction, a single closed curve drawn along a tube wall of the arc tube intersects zero or even number of times, every line drawn from the center conductor toward the annular conductor.