公开(公告)号：US11662550B1

公开(公告)日：2023-05-30

申请号：US16870491

申请日：2020-05-08

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Clinton Smith ,  Ryan Michael Ebert ,  David C. Lindberg ,  Nathaniel David Ginzton ,  Seth Robert Moczydlowski

IPC: G02B7/10

CPC classification number: G02B7/10

Abstract: The disclosed systems for varifocal adjustments may include a frame, an optical lens pair supported by the frame, and a flexure assembly. The optical lens pair may include a first lens that is movably coupled to the frame and a second lens that is fixedly coupled to the frame. The flexure assembly may be configured to constrain movement of the first lens to a substantially linear pathway. The flexure assembly may include at least one substantially planar flexure element having a first movable end portion coupled to the first lens and a second fixed end portion coupled to the frame. Various other devices, systems, and methods are also disclosed.

公开(公告)号：US11774705B1

公开(公告)日：2023-10-03

申请号：US16870510

申请日：2020-05-08

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Ryan Michael Ebert ,  Clinton Smith ,  David C. Lindberg ,  Nathaniel David Ginzton ,  Seth Robert Moczydlowski

IPC: G02B27/01 ,  G02B7/10

CPC classification number: G02B7/10 ,  G02B27/0172 ,  G02B27/0176

Abstract: The disclosed system for varifocal adjustments may include a frame, an optical lens pair supported by the frame, and a brake mechanism coupled to the frame. The optical lens pair may include a first lens that is movably coupled to the frame and a second lens that is fixedly coupled to the frame. The brake mechanism may be configured to frictionally stop movement of the first lens and to maintain a position of the first lens. Various other devices, systems, and methods are also disclosed.

公开(公告)号：US11454992B1

公开(公告)日：2022-09-27

申请号：US16422764

申请日：2019-05-24

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Clinton Smith ,  Ryan Michael Ebert

IPC: G05D3/12 ,  G02B27/00 ,  G02B7/10 ,  B81B3/00 ,  F16D3/52 ,  B81B5/00 ,  F16F1/18 ,  F16F1/22 ,  G05B15/02

Abstract: A flexure based guidance system for precision motion control includes a base that is fixed in position, a carriage that can move relative to the base, an actuator provides the force to move the carriage relative to the base, and one or more flexures arrays that each comprise two or more leaf flexure elements. The actuator causes the carriage to move relative to the base, which causes the flexure elements in the flexure array to flex. The leaf flexure elements are thin, compliant and deform, bend, or deflect in a deterministic manner when mechanically stressed. In some embodiments, stiffeners can be added to the flexures. The guidance system can be integrated into a varifocal head mounted display (HMD) to adjust a location of one or moveable elements in an optical system of the HMD to control a location of an image plane.