| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a condensing unit where a plurality of optical members are fixed without being adhered. <P>SOLUTION: A condensing unit 1, where stability of a non-adhesive fixation and contact among optical member groups 2 to 5 are improved, can be formed because a conventional adhesive applied between optical members becomes unnecessary by holding frames 14 and 15 which hold and fix both end sections of the optical member groups 2 to 5 integrally combining a polarization conversion member 2, a propagation member 4 and a multiplexing member 5 by surrounding an entire circumference of the both end sections. Therefore, the condensing unit 1 can prevent a positional deviation and heat damage by a thermal expansion of the optical members which might occur due to scattered light caused by a fixation of the optical members with the conventional adhesive. <P>COPYRIGHT: (C)2012,JPO&INPIT |
