Patent ID: 6719430
Filing Date: 2004-04-13
Classification: G02B,G03B,G09F,H04N

Abstract:
An optical system for projecting an image onto a display image plane at an incident angle &thgr; which is greater than zero, comprising:an image source; an anamorphic telescope for reducing anamorphic distortion of the image, wherein the anamorphic telescope provides a first magnification of the image in a first direction and provides a second magnification of the image in a second direction which is perpendicular to the first direction, wherein the first magnification is different than the second magnification, wherein the anamorphic telescope comprises a first substantially cylindrical lens group and a second substantially cylindrical lens group, and wherein at least one substantially rotationally symmetric lens group is positioned between the first substantially cylindrical lens group and the second substantially cylindrical lens group.