公开(公告)号：US10110866B1

公开(公告)日：2018-10-23

申请号：US15631097

申请日：2017-06-23

Applicant: Microvision, Inc.

Inventor： Matthieu Saracco ,  Roeland Collet ,  Alga Lloyd Nothern, III ,  Nenad Nestorovic ,  Jack H. Schmidt

IPC: H04N9/31 ,  G02B27/00

Abstract: The embodiments described herein provide scanning laser devices that include an output optic configured to reduce image distortion. Specifically, the output optic is configured to reduce the distortions that could otherwise occur at relatively short projection distances, while also providing good image quality at relatively long projection distances. In general, the output optic includes a prism having a first surface, a second surface, and a third surface. The prism is configured such that the laser light interacts with each of these three surfaces while being transmitted through the prism and outputted to the display surface. The first, second, and third surfaces are each formed to have a freeform rotationally asymmetric shape, and these freeform rotationally asymmetric shapes are configured to work together to correct distortion in projected images.