# US 2025/0147582 A1 · Method for determining an eye distance in a pair of data glasses, and data glasses > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0147582 A1 - Document ID: US20250147582A1 - Status: Published application - Kind: A1 - Application number: 18/693,625 - Filed: 2023-01-25 - Published: 2025-05-08 - Earliest claimed: 2022-03-17 - Assignees: Robert Bosch GmbH - Applicants: Robert Bosch GmbH - Inventors: Johannes Fischer; Soeren Sofke - Web page: https://patentgrep.com/patent/US20250147582A1 ## CPC - G02B 27/0172: {characterised by optical features} - G06F 3/013: {Eye tracking input arrangements (G06F3/015 takes precedence)} - G02B 27/0093: {with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking} - G02B 27/017: {Head mounted} - G02B 27/0179: {Display position adjusting means not related to the information to be displayed} - G02B 2027/0178: {Eyeglass type (eyeglass details G02C)} - G02B 2027/0187: {slaved to motion of at least a part of the body of the user, e.g. head, eye} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A method at least for determining an eye distance between a user's eye and an optical element of an optical system of a pair of data glasses including a virtual retina display. The method includes: generating a scanned laser beam; optically reproducing the scanned laser beam; illuminating a user's eye by means of the optically reproduced scanned laser beam; detecting a reflection signal reflected by the user's eye; ascertaining pupil positions within the detected reflection signal; determining relative distances of the pupil positions, ascertained from the reflection signal, to one another and/or to a common origin point and/or to one or more reference points; and calculating an instantaneous eye distance from the determined relative distances. ## Claims ### Claim at position 1 1-11. (canceled) ### Claim 12 A method at least for determining an eye distance between a user's eye and an optical element of an optical system of a pair of data glasses including a virtual retinal display, the method comprising the following steps: generating a scanned laser beam; optically reproducing the scanned laser beam; illuminating the user's eye using the optically reproduced scanned laser beam; detecting a reflection signal reflected by the user's eye; ascertaining pupil positions within the detected reflection signal; determining relative distances of the pupil positions ascertained from the reflection signal: to one another and/or to a common origin point and/or to one or more reference points; and calculating an instantaneous eye distance from the determined relative distances. ### Claim 13 (depends on 12) The method according to claim 12, wherein, using the optical reproduction of the scanned laser beam, at least two image copies shifted relative to one another in a pupil plane of the user's eye, are generated. ### Claim 14 (depends on 12) The method according to claim 12, wherein the instantaneous eye distance between the user's eye and a last optical element of the optical system, traversed by the scanned laser beam, of the data glasses is determined. ### Claim 15 (depends on 12) The method according to claim 12, wherein the instantaneous eye distance between the user's eye and an eyeglass lens of the data glasses is determined. ### Claim 16 (depends on 12) The method according to claim 12, wherein the scanned laser beam is reproduced by a segmentation lens. ### Claim 17 (depends on 12) The method according to claim 12, wherein the pupil positions are ascertained from the reflection signal using a bright-pupil effect. ### Claim 18 (depends on 12) The method according to claim 12, wherein the calculation of the instantaneous eye distance takes place recurrently at least during operation of the data glasses. ### Claim 19 (depends on 12) The method according to claim 12, wherein the calculation of the instantaneous eye distance takes place periodically at least during operation of the data glasses. ### Claim 20 (depends on 12) The method according to claim 12, wherein an output of the virtual retinal display including at least one focus of at least one visible portion of the scanned laser beam, is adjusted and/or optimized based on the calculated instantaneous eye distance. ### Claim 21 (depends on 12) The method according to claim 12, wherein detection of reflected images takes place independently at least of a camera configured to be separate from a laser projector of the virtual retinal display. ### Claim 22 An optical system of a pair of data glasses, comprising: a laser projector configured to generate a scanned laser beam; an optical reproduction element including a segmentation lens, configured to reproduce the scanned laser beam; and at least one detector configured to detect a reflection signal of the scanned and reproduced laser beam; wherein the optical system is configured to determine an eye distance between a user's eye and an optical element of the optical system, the optical system of the pair of data glasses including a virtual retinal display, the optical system configured to: generate the scanned laser beam using the laser projector; optically reproduce the scanned laser beam using the optical reproducting element; illuminate the user's eye using the optically reproduced scanned laser beam; detect, using the detector, a reflection signal reflected by the user's eye; ascertain pupil positions within the detected reflection signal; determine relative distances of the pupil positions ascertained from the reflection signal: to one another and/or to a common origin point and/or to one or more reference points; and calculate an instantaneous eye distance from the determined relative distances. ### Claim 23 Data glasses, comprising: an optical system, including: a laser projector configured to generate a scanned laser beam; an optical reproduction element including a segmentation lens, configured to reproduce the scanned laser beam; and at least one detector configured to detect a reflection signal of the scanned and reproduced laser beam; wherein the optical system is configured to: generate the scanned laser beam using the laser projector, optically reproduce the scanned laser beam using the optical reproducting element, illuminate a user's eye using the optically reproduced scanned laser beam, and detect, using the detector, a reflection signal reflected by the user's eye; an evaluation unit for evaluating the reflection signal detected by the detector, the evaluation unit configured to: ascertain pupil positions within the detected reflection signal, determining relative distances of the pupil positions ascertained from the reflection signal: to one another and/or to a common origin point and/or to one or more reference points, and calculate an instantaneous eye distance from the determined relative distances; and an eye distance compensation unit configured to dynamically control components of the optical system of the data glasses to compensate for eye distance variations.