公开(公告)号：US11454590B2

公开(公告)日：2022-09-27

申请号：US17044390

申请日：2019-06-20

Applicant: Lumus Ltd.

Inventor： Jonathan Gelberg ,  Yuval Rubin ,  Michael Adel

IPC: G01N21/45 ,  G01J9/02 ,  G01M11/02 ,  G01M11/00

Abstract: A system and method for measuring refractive index inhomogeneity between plates of a Lightguide Optical Element (LOE) uses an innovative measuring technique based on a shearing interferometric technique conventionally used to observe interference and test the collimation of light beams. Another feature of the current implementation is an innovative method for analyzing the characteristics of the generated interferogram to characterize discrepancies between adjacent plates in an LOE.

公开(公告)号：US11567331B2

公开(公告)日：2023-01-31

申请号：US17683507

申请日：2022-03-01

Applicant: Lumus Ltd.

Inventor： Yuval Rubin ,  Elad Sharlin

IPC: G02B27/01 ,  G06T3/40 ,  G06T19/00

Abstract: A display device (10) for producing images to be viewed by an observer includes an optical system (14) and a control unit (20). The optical system receives input light indicative of an image into a light propagation channel (14A) and produces, at an exit pupil (14B), output light having a field of view (FOV) corresponding to the image to be presented to the observer (18). The light propagation channel has an intensity transfer function map I1(x,φ) of the optical system across a lateral dimension x of the exit pupil and an angular 20 span φ of the FOV. The control unit (20) modifies the image data which is to be input in the optical system by applying thereto intensity modulation based on a correction intensity map that at least partially compensates intensity non-uniformity in the intensity transfer function map I1(x,φ) of the optical system, such that the light output at the exit pupil of the optical system and indicative of the image, has a modulated intensity map which is observed by the viewer with improved intensity uniformity.

公开(公告)号：US11262587B2

公开(公告)日：2022-03-01

申请号：US17044418

申请日：2019-05-22

Applicant: Lumus Ltd.

Inventor： Yuval Rubin ,  Elad Sharlin

IPC: G02B27/01 ,  G06T3/40 ,  G06T19/00

Abstract: A display device (10) for producing images to be viewed by an observer includes an optical system (14) and a control unit (20). The optical system receives input light indicative of an image into a light propagation channel (14A) and produces, at an exit pupil (14B), output light having a field of view (FOV) corresponding to the image to be presented to the observer (18). The light propagation channel has an intensity transfer function map I1(x,φ) of the optical system across a lateral dimension x of the exit pupil and an angular 20 span φ of the FOV. The control unit (20) modifies the image data which is to be input in the optical system by applying thereto intensity modulation based on a correction intensity map that at least partially compensates intensity non-uniformity in the intensity transfer function map I1(x,φ) of the optical system, such that the light output at the exit pupil of the optical system and indicative of the image, has a modulated intensity map which is observed by the viewer with improved intensity uniformity.