Projet ion lens for the projection of digital image data

摘要

Projection objective for the projection of digital image data, which in the specified sequence of a projection screen has, viewed from the following elements:– a first positive lens (10; 510; 910);– a second negative lens (16; 516; 916);– a third lens (22; 522; 922);– a fourth lens (28; 528; 928);– a fifth positive lens (38; 538; 938);– a sixth negative lens (44; 544; 944);– a seventh negative lens (50; 550; 950);– an eighth positive lens (56; 556; 956); and– a ninth positive lens (62; 562; 962);wherein between the fourth lens and the fifth positive lens is arranged a fictitious plane;the arithmetic mean value of ν_ave the abbé - numbers ν_d the positive lens elements, which, when viewed from the projection wall behind the fictitious plane are arranged, and the negative lens elements, which, when viewed from the projection screen before..