# US 10,117,603 B2 · Field-of-view ocular and facial alignment guides > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,117,603 B2 - Document ID: US10117603B2 - Status: Granted - Kind: B2 - Application number: 14/752,939 - Filed: 2015-06-27 - Published: 2016-12-29 - Granted: 2018-11-06 - Earliest claimed: 2015-06-27 - Assignees: Intel Corporation - Applicants: Intel Corporation - Inventors: Kerry A. Stevens; Yoshifumi Nishi - Web page: https://patentgrep.com/patent/US10117603B2 ## CPC - A61B 5/117: Identification of persons (methods or arrangements for recognising patterns, e.g. fingerprints, G06F18/00, G06V40/00; identification of persons by analysing their voice or speech G10L17/00) - G06F 21/32: using biometric data, e.g. fingerprints, iris scans or voiceprints - G06F 21/83: input devices, e.g. keyboards, mice or controllers thereof - G06V 40/18: Eye characteristics, e.g. of the iris - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING ## Abstract Low-cost, easy-to-use alignment target generators for aligning a user's own face or eye to a camera or scanner are based on field-of-view visual feedback from a filtered or apertured planar light source. These approaches may be made agnostic to the scanner's operating system or other software. Alternatively, software on the scanner or its host device may create a solid light-colored section of an existing display screen to use as a planar light source. In some embodiments, the planar light source may be the virtual image of an object viewed in a plane mirror. ## Claims ### Claim 1 A system, comprising: a biometric measurement device to measure a biometric trait of a user positioned with an eye at an aligned eye position; and an alignment target generator comprising an optical train that alters light from a planar light source such that an aligned eye at the aligned eye position sees a first pattern or a first color from the light; wherein the optical train comprises at least one of: a beam blocker having an annular aperture of uniform width, a window having a plurality of sectors with each sector having a different transmission spectrum, a plurality of waveguides at angles that converge toward the aligned eye position, or a plurality of mirrors tangent to a surface of a sphere concentric with the aligned eye position; wherein a misaligned eye is at a position that differs from the aligned eye position by more than a threshold and sees a second pattern or a second color from the light; and wherein the threshold is defined by a point at which vignetting of the user's eye is at a desired level. ### Claim 2 (depends on 1) The system of claim 1, wherein an input of a biometric scanner is concentric with a pattern seen by the aligned eye. ### Claim 3 (depends on 1) The system of claim 1, wherein an input of the biometric scanner is on an optic axis of the alignment target generator. ### Claim 4 (depends on 1) The system of claim 1, wherein light from the optical train converges to a spot size at the aligned eye position where light from the optical train is at a desired level. ### Claim 5 (depends on 1) The system of claim 1, wherein light from the optical train is normally incident on the aligned eye and non-normally incident on the misaligned eye. ### Claim 6 A system, comprising: an electronic device having a planar self-illuminating screen mounted in a housing; a biometric scanner associated with the electronic device; and an alignment target generator that alters light generated by the planar self-illuminating screen such that an aligned eye at an aligned eye position sees a first pattern or a first color from the light and a misaligned eye at a position that differs from the aligned eye position by more than a threshold sees a second pattern or a second color from the light; wherein the alignment target generator comprises at least one of: a beam blocker having an annular aperture of uniform width, a window having a plurality of sectors with each sector having a different transmission spectrum, a plurality of waveguides at angles that converge toward the aligned eye position, or a plurality of mirrors tangent to a surface of a sphere concentric with the aligned eye position; and wherein the threshold is defined as a function of recognition of an authorized user of the electronic device by the biometric scanner. ### Claim 7 (depends on 6) The system of claim 6, wherein the alignment target generator comprises a mounting feature that enables moving the alignment target generator away from the planar self-illuminating screen when the alignment target generator is not in use. ### Claim 8 (depends on 6) The system of claim 6, wherein the alignment target generator comprises a removable mounting clip that, when in place on a housing of the electronic device, positions the alignment target generator in front of the planar self-illuminating screen. ### Claim 9 (depends on 8) The system of claim 8, wherein the removable mounting clip is held in place by spring force or friction against the housing. ### Claim 10 (depends on 1) The system of claim 1, wherein the planar light source comprises: a light-emitting diode; and a first optical element positioned to modify emitted light from the light-emitting diode to a form that resembles light emitted from a planar source. ### Claim 11 (depends on 1) The system of claim 1, wherein the planar light source comprises a light-emitting diode array. ### Claim 12 (depends on 1) The system of claim 1, wherein the planar light source comprises a self-illuminating screen. ### Claim 13 (depends on 1) The system of claim 1, wherein the optical train further comprises: a beam-shaping element that forms an image of the annular aperture; wherein the first pattern comprises an illuminated annulus of uniform width; and wherein the second pattern comprises an illuminated crescent. ### Claim 14 (depends on 1) The system of claim 1, wherein the optical train further comprises: a window that has a first transmission spectrum in a first 180-degree sector and a second transmission spectrum in a second 180-degree sector; wherein the first color comprises a color that corresponds to the planar light source filtered by an average of the first transmission spectrum and the second transmission spectrum; and wherein the second color comprises a color that corresponds to the planar light source filtered by the first transmission spectrum or the second transmission spectrum. ### Claim 15 (depends on 1) The system of claim 1, wherein the optical train further comprises: a window that has a first transmission spectrum in a first 120-degree sector, a second transmission spectrum in a second 120-degree sector, and a third transmission spectrum in a third 120-degree sector; wherein the first color comprises a color that corresponds to the planar light source filtered by an average of the first transmission spectrum, the second transmission spectrum, and the third transmission spectrum; and wherein the second color comprises a color that corresponds to the planar light source filtered by the first transmission spectrum, the second transmission spectrum, or the third transmission spectrum. ### Claim 16 (depends on 1) The system of claim 1, wherein the optical train further comprises a beam blocker pierced by a plurality of waveguides at angles that converge toward the aligned eye position; wherein light from the planar light source enters and exits each of the waveguides; wherein the first pattern comprises a dot of a selected brightness that corresponds to each waveguide; and wherein the second pattern comprises dimmer or fewer dots than the first pattern. ### Claim 17 (depends on 1) The system of claim 1, wherein the optical train further comprises a plurality of mirrors tangent to the surface of the sphere concentric with the aligned eye position; wherein the aligned eye sees all of the plurality of mirrors; and wherein the misaligned eye sees fewer than all of the plurality of mirrors.