| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a lighting device, together with a projector device using the same, in which increase of a divergence angle is suppressed and the diameter of optical flux is decreased. <P>SOLUTION: Following a main reflecting surface of paraboloid, a first sub- reflecting surface which is concave and a second sub-reflecting surface which is convex are arranged, with the focal point of the two sub-reflecting surfaces being opposed points on either side of the optical axis. <P>COPYRIGHT: (C)2004,JPO</p> |
