| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a projection optical system with a Fourier plane, which can achieve a flat type projection display device which can make aberrations of an optical system small and has image display characteristics of high resolution and high definition. <P>SOLUTION: In the projection optical system, an optical image emitted from an image display element 10 is Fourier-transformed by a first phase modulation element 1, and a Fourier spectrum appearing on a Fourier plane 30 by this transform is inversely Fourier-transformed by a second phase modulation element 2, and an image is enlarged and formed on a screen 20. Respective optical axes of the image display element and the first and second phase modulation elements are different from one another, and the optical axes of the first and second phase modulation elements and the normal of the screen face are approximately parallel with the optical axis of the image display element. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
