| 摘要 |
PROBLEM TO BE SOLVED: To effectively use luminous flux emitted from a lamp. SOLUTION: A PBS plate 11 and a reflection mirror 12 are arranged so as to form mutually different angles with respect to the optical axis of the lamp. The end part of the mirror 12 opposed to a first lens array is provided with an interval corresponding to the divergent angle of a lens cell 4a and the end part thereof opposed to a second lens array is provided with an interval corresponding to the pitch of the lens cells 4a and 4b. Besides, the centers of the curvature of a lens cell 2a and the cells 4a and 4b are decentered with respect to the optical axis so that the luminous flux being in parallel with the optical axis can be emitted from the cells 4a and 4b. |
