| 摘要 |
PROBLEM TO BE SOLVED: To make a projector suitable for a multipurpose projector coping with various scenes as a video data base at a planetarium and an amusement video space for a slide projector. SOLUTION: Relay optical systems 2 and 3 are provided between a projection lens 1 and an original plate 6, and the pictures of a projecting original plate 6 is projected as aerial pictures reduced by the relay optical systems 2 and 3 by the projections lens 1. Then, an necessary position accuracy on the original plate 6 is controlled at a practical degree, and a phase changing device performing the syzygy of a video projected between the relay optical systems 2 and 3 is provided, so that F-number is made small and the bright video is obtained. |
