# US 11,308,695 B2 · Optical apparatus and augmented reality device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,308,695 B2 - Document ID: US11308695B2 - Status: Granted - Kind: B2 - Application number: 16/231,812 - Filed: 2018-12-24 - Published: 2019-06-27 - Granted: 2022-04-19 - Earliest claimed: 2017-12-22 - Assignees: Lenovo (Beijing) Limited - Applicants: Lenovo (Beijing) Co., Ltd. - Inventors: Shun Lan; Zhou Zhang; Lu Tang - Web page: https://patentgrep.com/patent/US11308695B2 ## CPC - G06T 19/006: {Mixed reality (object pose determination, tracking or camera calibration for mixed reality G06T7/00)} - G02B 27/0172: {characterised by optical features} - G02B 27/14: operating by reflection only - G02B 2027/011: {comprising device for correcting geometrical aberrations, distortion} - G02B 2027/013: {comprising a combiner of particular shape, e.g. curvature} - G02B 2027/0178: {Eyeglass type (eyeglass details G02C)} - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract An optical apparatus and an augmented reality device are provided. The optical apparatus includes an inner surface. The inner surface includes a predetermined region serving as a curved mirror with a predetermined optical parameter for reflection imaging of a virtual image of a virtual world. The optical apparatus further includes an outer surface. The outer surface and the inner surface are used for refraction imaging of a real image of a real world. The virtual image and the real image are integrated for forming a scene of augmented reality. ## Claims ### Claim 1 An optical apparatus for a wearable augmented reality device, comprising: an inner surface, the inner surface being an irregular and aspherical surface and a surface of the optical apparatus that directly faces the user, wherein the inner surface comprises a predetermined region serving as a curved mirror with a predetermined optical parameter for reflection imaging of a virtual image of a virtual world; and an outer surface, the outer surface being an irregular and aspherical surface, wherein: an axis of the optical apparatus is parallel to a direction of observing the virtual world, the axis of the optical apparatus intersecting with the inner surface region serving as the curved mirror; the inner surface and the outer surface are used for refraction imaging of a real image of a real world, and the virtual image and the real image are integrated for forming a scene of augmented reality; a thickness between the inner surface and the outer surface is uneven; the predetermined region of the inner surface comprises an upper half portion of the inner surface and a lower half portion of the inner surface, one of the upper half portion of the inner surface and the lower half portion of the inner surface having a concave shape until the other one having a convex shape; and the outer surface comprises an upper half portion of the outer surface and a lower half portion of the outer surface, one of the upper half portion of the outer surface and the lower half portion of the outer surface having a concave shape until the other one having a convex shape, such that lens comprising the inner surface and the outer surface eliminate distortion for a user of the wearable augmented reality device and the user observes the scene of augmented reality at a focal point of the lens. ### Claim 2 (depends on 1) The apparatus according to claim 1, wherein: the inner surface comprises at least two predetermined regions serving as curved mirrors integrated into the inner surface to eliminate distortion due to differences of the virtual image viewed by a left eye and a right eye of the user; and the predetermined optical parameter comprises values of curvature radius, thickness and size that matches a corresponding parameter suitable for the curved mirrors for the wearable augmented reality device. ### Claim 3 An augmented reality device, comprising: a memory and a processor for executing instructions stored in the memory; a display screen; and an optical apparatus; wherein: when the instructions are executed by the processor, the processor cause the display screen to provide a virtual image of a virtual world to the optical apparatus; and the optical apparatus comprises: an inner surface, the inner surface being an irregular and aspherical surface and a surface of the optical apparatus that directly faces a user of the augmented reality device, and the inner surface having a predetermined region serving as a curved mirror with a predetermined optical parameter for reflection imaging of the virtual image of the virtual world; and an outer surface, the outer surface being an irregular and aspherical surface, wherein: an axis of the optical apparatus is parallel to a direction of observing the virtual world, the axis of the optical apparatus intersecting with the inner surface region serving as the curved mirror; the inner surface and the outer surface are used for refraction imaging of a real image of a real world, and the virtual image and the real image are integrated for forming a scene of augmented reality; a thickness between the inner surface and the outer surface is uneven; the predetermined region of the inner surface comprises an upper half portion of the inner surface and a lower half portion of the inner surface, one of the upper half portion of the inner surface and the lower half portion of the inner surface having a concave shape until the other one having a convex shape; and the outer surface comprises an upper half portion of the outer surface and a lower half portion of the outer surface, one of the upper half portion of the outer surface and the lower half portion of the outer surface having a concave shape until the other one having a convex shape, such that lens comprising the inner surface and the outer surface eliminate distortion for a user of the wearable augmented reality device and the user observes the scene of augmented reality at a focal point of the lens. ### Claim 4 (depends on 3) The device according to claim 3, further comprising: a beam splitter, for receiving the virtual image projected from the display screen and reflecting the virtual image to the predetermined region of the inner surface of the optical apparatus. ### Claim 5 (depends on 4) The device according to claim 4, wherein the beam splitter and the optical apparatus form a coaxial optical system. ### Claim 6 (depends on 4) The device according to claim 4, wherein the processor is further configured to: cause an adjusting device disposed inside the augmented reality device to adjust a relative position between the inner surface of the optical apparatus and the beam splitter to be a predetermined relative position. ### Claim 7 (depends on 3) The device according to claim 3, wherein the processor is further configured to: cause a positioning device to obtain position information of the augmented reality device to adjust a relevant parameter of the virtual image projected from the display screen based on the position information. ### Claim 8 (depends on 3) The device according to claim 3, wherein: the inner surface comprises at least two predetermined regions serving as curved mirrors integrated into the inner surface to eliminate distortion due to differences of the virtual image viewed by a left eye and a right eye of the user; and the predetermined optical parameter comprises values of curvature radius, thickness and size that matches a corresponding parameter suitable for curved mirrors in the augmented reality device.