| 摘要 |
In order to obtain an illuminating device (1A-1K) that is capable of exhibiting intended light distribution characteristics and highly efficient illumination in spite of the use of a compact configuration, this illuminating device comprises a light source (a point light source (2)) and an illuminating optical system having a T-shaped cross section, and illuminates light in two different directions simultaneously, said illuminating optical system comprising an entrance part where light emitted from the point light source enters, first and second light paths for guiding the light incident on the entrance part in two different directions in a divided manner, and first and second exit parts for emitting the light that has been guided in the divided manner. The illuminating device is configured such that illuminating light comprising a combination of first light, which is reflected off a first reflecting section and a second reflecting section, and second light, which is reflected off the second reflecting section without involving the first reflecting section, is emitted from each of the first and second exit parts. |
