US Patent No. 10,561,008

LASER DRIVEN LAMP


Patent No. 10,561,008
Issue Date February 11, 2020
Title Laser Driven Lamp
Inventorship Kazuyuki Mori, Tokyo (JP)
Junya Asayama, Tokyo (JP)
Toshio Yokota, Tokyo (JP)
Assignee USHIO DENKI KABUSHIKI KAISHA, Tokyo (JP)

Claim of US Patent No. 10,561,008

1. A laser driven lamp configured to enclose light emitting gas, receive a converging laser beam and generate plasma from the laser beam, the laser driven lamp comprising:a main body having a columnar shape;
a concave reflecting portion formed at a front side of the main body, the concave reflecting portion having a focal point at which the laser beam converges;
a light exit window provided in front of the concave reflecting portion;
a laser beam passing hole formed at a center of the main body, the laser beam passing hole penetrating the main body in an optical axial direction of the lamp;
a light entrance window provided at a rear side of the main body, the laser beam being incident to the light entrance window; and
a tapered part at a light incident side of the laser beam passing hole in the main body,
the main body, the light exit window and the light entrance window constituting in combination a closed space, and
the light emitting gas being enclosed in the closed space.