Patent ID: 11940139
Assignee: DAI NIPPON PRINTING CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  G | IPC F  G

Claim 0:
1. A lighting device comprising:
a light source that emits coherent light;
a scanner that causes the coherent light emitted from the light source to move;
a first optical system that regulates an optical path of the coherent light from the scanner;
a first optical member that causes the coherent light from the first optical system to diffuse;
a second optical system that regulates an optical path of the coherent light from the first optical member; and
a second optical member that directs the coherent light from the second optical system toward a lighting zone on a plane of projection,
wherein
the lighting zone on the plane of projection is illuminated with the coherent light from the second optical member, and
an irradiance [W/m2] in a plane orthogonal to an optical axis of the coherent light irradiated on the lighting zone is non-discrete.