| 摘要 |
<p>PROBLEM TO BE SOLVED: To greatly improve the illumination quality on a final projection screen by enhancing the efficiency of screen illumination by the adequate shapes of a reflector, field lens and angle correcting lens and forming these lenses in such a manner as to minimize the light loss between a lamp and a screen. SOLUTION: This reflector 5 is used for illuminating the surface. The shapes Zr,βof the reflector 5 are expressed by the set of the basic surface dS. The respective basic surfaces associate with a function Z(ρ). This function corresponds to the central surface (r,β) to be illuminated. The central surface is defined by the distance (r) between the center and edge of the surface and the angleβof the horizontal plane and the central surface. The inclination of the respective basic surfaces dS are calculated by interpolating the function Z(ρ) by the functions Z (x, y).</p> |
