| 摘要 |
A first light-source unit and a second light-source unit are disposed in such a manner that those respective optical axes intersect approximately perpendicularly to each other, a reflective polarizing plate is disposed in the intersecting position of both optical axes at an angle of approximately 45°, a reflecting mirror is disposed approximately parallel with the reflective polarizing plate to reflect two light beams in the same direction on one of first and second optical paths emerging from the reflective polarizing plate, and secondary images of the first and second light-source units formed on each of lens cells of a second lens array plate by a first lens array plate are focused at respective different positions on the same lens cell.
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