公开(公告)号：US20130113788A1

公开(公告)日：2013-05-09

申请号：US13667878

申请日：2012-11-02

Applicant: REALD INC.

Inventor： Miller H. Schuck

IPC: G02B27/48 ,  G02B27/22 ,  G02B27/26 ,  G03B21/14

CPC classification number: G03B21/2033 ,  G02B13/0095 ,  G02B26/0875 ,  G02B27/0933 ,  G02B27/48 ,  G03B21/142 ,  G03B35/26 ,  H04N13/363

Abstract: Disclosed herein are optical projection systems and related methods for projecting imagery employing shifting image position in-time to mitigate speckle. Exemplary optical systems may include a projector having a light source, a relay lens and at least one projection lens for projecting images. The relay lens or the projection lens may have at least one lens element that may be translated in-time substantially orthogonal to the optical axis of the optical system. Alternatively, the projection lens in its entirety may be shifted in-time to reduce speckle. Further, in stereoscopic embodiments, two projection lenses may be employed, wherein at least one element in each projection lens is moveable to shift the image in-time to reduce speckle. Moreover, electronic compensation, such as electronic addressing or image warping, for the image shifting may be employed to shift the image in a direction opposite to the speckle-reducing shift in position.