| 摘要 |
<p>In the light source device (10) of the projection type display apparatus, wherein light utilization efficiency is high, luminous intensity uniformity on a screen is also high, and the long life of the light source device can be achieved, and a first light source lamp (11), a second light source lamp (12) and a relay optical system (13) are arranged so that there is no part where an optical axis (13c1, 13c2, 13c3) of a first light flux (L1) from the first light source lamp (11) through the relay optical system (13) to an entrance end (15a) of a light intensity equalizing element (15) and an optical axis of a second light flux from the second light source lamp (12) to the entrance end (15a) agree with each other, and the optical axis (13c3) of the first light flux (L1) immediately before incidence on the entrance end (15a) and the optical axis (12c) of the second light flux (L2) from the second light source lamp (12) to the entrance end (15a) are substantially parallel to each other.</p> |
