| 摘要 |
With a view to providing a projection display system utilizing a reflection display device which can project on a projection surface a high-quality image which is free from irregular luminance and reduced contrast, there is provided a projection display system comprising a reflection display device 1, a light source system optical member 2 for projecting an illumination beam toward the reflection display device 1 from a direction inclined in one direction relative to a front surface direction of the reflection display device 1, a projection system optical member 15 for projecting an image beam that has exited from the reflection display device on a projection surface, and a relay lens 14 disposed on a front surface side of the reflection display device 1 for correcting the illumination beam that has entered from a surface which faces the light source system optical member 2 and the projection system optical member 15 into a parallel beam which follows a direction inclined at a predetermined angle relative to the front surface direction of the reflection display device so as to make the parallel beam so corrected enter the reflection display device 1, making an image beam that has exited from the reflection display device 1 enter the projection system optical member 15 and making part of the illumination beam from the light source system optical member 2 that has been surface reflected on the surface which faces the light system optical member and the projection system optical member exit in directions other than the direction in which the image beam is projected by the projection system optical member 15.
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