| 摘要 |
PROBLEM TO BE SOLVED: To allow a general-purpose application for satisfying the specified luminous intensity distribution, regardless of the difference in the form of a body as a mounting object. SOLUTION: Optical axes X1-X1 of fisheye lens steps 26 formed on a lens 3 is inclined in one direction relative to the center axis X-X of a Fresnel lens 26 or the optical axis of the reflecting surface thereof. The illuminance distribution 36 of irradiation beams 35 emitted from the lens 3 is thereby made eccentric in one direction. |
