| 摘要 |
PROBLEM TO BE SOLVED: To provide a means to efficiently and uniformly radiate a rectangular area. SOLUTION: As for a radiation optical system constituted of a light source 10, a condensing means 20 and a light uniformizing means 30, the light uniformizing means 30 is composed of a first rod group 31, a second rod 33 which is flat and a lens 34 where the light emitting surface and the face to be irradiated of the second rod 33 are conjugated. |
