| 摘要 |
PROBLEM TO BE SOLVED: To provide a luminary that allows homogeneous lengthwise lighting without a risk of dazzling a user.SOLUTION: The invention relates to an optical device for imparting an elongate shape to a light beam emitted by an LED, and to a luminary which comprises the optical device. The optical device comprises a lens 2 having an entry diopter 3 and an exit diopter 4. The exit diopter 4 comprises a first convergent section, a second convergent section and a divergent section that bridges the first and second convergent sections. |
