公开(公告)号：WO2021162781A1

公开(公告)日：2021-08-19

申请号：PCT/US2020/065967

申请日：2020-12-18

Applicant: VALVE CORPORATION

Inventor： RAUSCH, Kameron, Wade

IPC: G02B27/28 ,  G02B5/30 ,  G03B11/00 ,  G01J4/04

Abstract: Systems and methods for providing a polarimetry camera operative to obtain high fidelity surface characterization measurements. A polarimetry camera may include an multi-twist retarder component that is operative selectively switch between two or more polarization filtering states, wherein in each polarization filtering state, the multi-twist retarder component only passes light having a particular polarization state or orientation (e.g., horizontal linear polarization, vertical linear polarization, 45 degree linear polarization, circular polarization) and reflects or absorbs light having other polarization states. The multi-twist retarder may also include one or more diffraction patterns that focus light. The polarimetry camera may capture images using a sensor array as the multi-twist retarder is switched between the at least two polarization filtering states, thereby capturing a sequence of polarization specific images that may be displayed or used to determine one or more Stokes parameters for a scene in real-time.