| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting device which improves in luminance uniformity of an irradiation surface to which light is projected.SOLUTION: A lighting device includes a light source and an optical system. The optical system projects light from the light source, and also controls distribution of the projected light so that a light distribution curve from a vertical angle of 0° as a light axis to a beam angle of 1/10 turns into a linear fashion.SELECTED DRAWING: Figure 1 |
