Patent ID: 6545803
Filing Date: 2003-04-08
Classification: G02B

Abstract:
A virtual screen stereoscopic display apparatus, comprising:at least two displays arranged to display characters and image information; at least two optical projection elements arranged to enlarge, project and form real images of object images displayed by the at least two displays in a display space, the real images formed by the at least two optical projection elements being projected in-space images; and at least one optical focusing system arranged to position light fluxes received from the two projected in-space images at two predetermined view regions, respectively; wherein centers of said two view regions are spaced apart from each other in a transverse direction, wherein said at least two displays have an effective diagonal length DLC; said at least two optical projection elements have an effective F number which is defined by Fe=S1/PuD wherein S1 is a distance between the display and a principal point of the two optical projection elements and PuD is a diameter of an exit pupil of the two optical projection elements; and wherein a diameter of a range in which the image is viewable to the observer in the view region is ERD and a diagonal length of the virtual screen is VSD and a distance between the virtual screen and the view region is VSP, and the following equation is satisfied: VSD/VSP=DLC/(ERDÃ—Fe).