公开(公告)号：US20200333131A1

公开(公告)日：2020-10-22

申请号：US16763210

申请日：2018-11-09

Applicant: Princeton Optronics, Inc.

Inventor： Baiming GUO ,  Jean-Francois SEURIN ,  Chuni GHOSH ,  Laurence WATKINS

IPC: G01B11/00 ,  H01S5/42 ,  G02B27/42 ,  H01S5/183 ,  H01S5/00 ,  G06K9/20 ,  G06K9/00

Abstract: The present disclosure describes techniques to improve the resolution and reduce the distortion of structured light projection in miniature wide-angle VCSEL array projection modules used for 3D imaging and gesture recognition. The projector module includes a chief ray corrector optical element, which directs the VCSEL beams along the projector lens chief ray paths. The VCSEL structured illumination projector using the chief ray optical element corrector can create a high resolution, low distortion structured light pattern over an extended distance range greater that the projector lens image focal range. The corrector element is placed close to the VCSEL array. The corrector element can be implemented in various ways including, for example, a refractive lens, diffractive lens or microlens array, depending on the specific application requirements and optical configurations.