# US 2026/0086232 A1 · Wearable device proximity detection using infrared light > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0086232 A1 - Document ID: US20260086232A1 - Status: Published application - Kind: A1 - Application number: 19/339,261 - Filed: 2025-09-24 - Published: 2026-03-26 - Earliest claimed: 2024-09-24 - Assignees: Meta Platforms Technologies, LLC - Applicants: Meta Platforms Technologies, LLC - Inventors: Xiyu Duan; Travis Taylor; Inigo Arnaiz Duenas; Chung-Che Huang - Web page: https://patentgrep.com/patent/US20260086232A1 ## CPC - G01S 17/04: Systems determining the presence of a target - G01S 7/4815: {using multiple transmitters} - G06F 3/012: {Head tracking input arrangements} - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A wearable device including wear detecting is described. The device includes, a frame configured to be worn on a face of a wearer, a skin sensor disposed in a portion of the frame, the skin sensor comprising at least one light emitter configured to emit light in a short-wave infrared (SWIR) wavelength range and at least one light detector configured to capture reflected light, and one or more processors. The one or more processors are configured to cause the at least one light emitter to emit the light in the SWIR wavelength range, obtain signals characteristic of reflected light captured by the at least one light detector, and determine whether a user is wearing the wearable device on the face of the wearer based at least in part on the obtained signals. ## Claims ### Claim 1 A head-wearable device, comprising: a frame configured to be worn on a face of a user; a wear detection sensor disposed in a portion of the frame, the wear detection sensor comprising: at least one light emitter configured to emit light in a short-wave infrared (SWIR) wavelength range; and at least one light detector configured to capture reflected light emitted by the at least one light emitter; and one or more processors configured to: cause the at least one light emitter to emit the light in the SWIR wavelength range; obtain signals characteristic of reflected light emitted by the at least one light emitter captured by the at least one light detector; and determine whether a user is wearing the head-wearable device on the face of the user based at least in part on the obtained signals. ### Claim 2 (depends on 1) The head-wearable device of claim 1, wherein the wear detection sensor is disposed on a portion of the frame configured to be proximate to a nose of the user. ### Claim 3 (depends on 2) The head-wearable device of claim 2, wherein the wear detection sensor is disposed on a portion of the frame configured to be proximate to a nostril of the user. ### Claim 4 (depends on 2) The head-wearable device of claim 2, wherein the wear detection sensor is disposed on a portion of the frame configured to be proximate to a bridge of the nose of the user. ### Claim 5 (depends on 1) The head-wearable device of claim 1, wherein the wear detection sensor further comprises a light sealing gasket disposed between the at least one light emitter and the at least one light detector. ### Claim 6 (depends on 1) The head-wearable device of claim 1, wherein the wear detection sensor is configured to be spaced apart from the face of the user when the head-wearable device is worn. ### Claim 7 (depends on 6) The head-wearable device of claim 6, wherein the wear detection sensor is configured to be less than 30 millimeters away from the face of the user when the head-wearable device is worn. ### Claim 8 (depends on 1) The head-wearable device of claim 1, wherein the processor is further configured to determine a proximity of the face of the user to the head-wearable device based at least in part on the obtained signals. ### Claim 9 (depends on 1) The head-wearable device of claim 1, wherein the at least one light emitter comprises a plurality of light emitters, wherein each light emitter of the plurality of light emitters is configured to emit light at a distinct wavelength within the SWIR wavelength range. ### Claim 10 (depends on 9) The head-wearable device of claim 9, wherein the at least one light detector is configured to capture reflected light emitted by each of the plurality of light emitters. ### Claim 11 (depends on 10) The head-wearable device of claim 10, wherein the processor is further configured to: determine a ratio of captured reflected light emitted by a first light emitter of the plurality of light emitters at a first wavelength and captured reflected light emitted by a second light emitter of the plurality of light emitters at a second wavelength; and determine whether the user is wearing the head-wearable device on the face of the user based on if the ratio exceeds a predetermined threshold. ### Claim 12 A method, comprising: causing the at least one light emitter to emit the light in the SWIR wavelength range; obtaining signals characteristic of reflected light emitted by the at least one light emitter captured by the at least one light detector; and determining whether a user is wearing the head-wearable device on the face of the user based at least in part on the obtained signals. ### Claim 13 (depends on 12) The method of claim 12, further comprising determining a proximity of the face of the user to the head-wearable device based at least in part on the obtained signals. ### Claim 14 (depends on 12) The method of claim 12, wherein: the at least one light emitter comprises a plurality of light emitters, and each light emitter of the plurality of light emitters is configured to emit light at a distinct wavelength within the SWIR wavelength range. ### Claim 15 (depends on 14) The method of claim 14, wherein the at least one light detector is configured to capture reflected light emitted by each of the plurality of light emitters. ### Claim 16 (depends on 15) The method of claim 15, wherein the processor is further configured to: determine a ratio of captured reflected light emitted by a first light emitter of the plurality of light emitters at a first wavelength and captured reflected light emitted by a second light emitter of the plurality of light emitters at a second wavelength; and determine whether the user is wearing the head-wearable device on the face of the user based on if the ratio exceeds a predetermined threshold. ### Claim 17 A non-transitory computer readable storage medium including instructions that, when executed by a computing device, cause the computing device to: cause at least one light emitter coupled to a head-wearable device to emit light in an SWIR wavelength range; obtain signals characteristic of reflected light captured by at least one light detector coupled to the head-wearable device; and determine whether a user is wearing the head-wearable device on a face of a user based at least in part on the obtained signals. ### Claim 18 (depends on 17) The non-transitory computer readable storage medium of claim 17, wherein: the at least one light emitter comprises a plurality of light emitters, and each light emitter of the plurality of light emitters is configured to emit light at a distinct wavelength within the SWIR wavelength range. ### Claim 19 (depends on 18) The non-transitory computer readable storage medium of claim 18, wherein the at least one light detector is configured to capture reflected light emitted by each of the plurality of light emitters. ### Claim 20 (depends on 19) The non-transitory computer readable storage medium of claim 19, further including instructions that cause the computing device to: determine a ratio of captured reflected light emitted by a first light emitter of the plurality of light emitters at a first wavelength and captured reflected light emitted by a second light emitter of the plurality of light emitters at a second wavelength; and determine whether the user is wearing the head-wearable device on the face of the user based on if the ratio exceeds a predetermined threshold.