| 摘要 |
<p>PURPOSE:To provide an oblique projection display device being in focus and further, not having a trapezoidal distortion on a projected image, even if a distance between a projecting means and a screen is changed and magnifying power is changed. CONSTITUTION:The projection display device is composed of first projection optical systems 3 and 4 converting an image generated by a light bulb 2 into an intermediate image 5 having the trapezoidal distortion, and a second projection optical system 6 converting the intermediate image 5 having the trapezoidal distortion into the image not having the trapezoidal distortion, on the screen 7, and the first projection optical systems 3 and 4 can be rotated by a link 8.</p> |
