# US 10,117,574 B2 · Portable wavefront aberrometer with open field alignment channel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,117,574 B2 - Document ID: US10117574B2 - Status: Granted - Kind: B2 - Application number: 14/991,055 - Filed: 2016-01-08 - Published: 2016-07-14 - Granted: 2018-11-06 - Earliest claimed: 2015-01-09 - Assignees: Smart Vision Labs - Applicants: Smart Vision Labs - Inventors: Yaopeng Zhou - Web page: https://patentgrep.com/patent/US10117574B2 ## CPC - A61B 3/107: for determining the shape or measuring the curvature of the cornea - A61B 3/0025: {characterised by electronic signal processing, e.g. eye models} - A61B 3/0091: {Fixation targets for viewing direction} - A61B 3/1015: {for wavefront analysis} - A61B 3/12: for looking at the eye fundus, e.g. ophthalmoscopes (A61B3/13 takes precedence) - A61B 3/14: Arrangements specially adapted for eye photography - A61B 3/152: {for aligning} - A61B 5/6898: {Portable consumer electronic devices, e.g. music players, telephones, tablet computers} - G02B 3/0075: {characterized by non-optical structures, e.g. having integrated holding or alignment means} - H04N 23/51: Housings - H04N 23/55: Optical parts specially adapted for electronic image sensors; Mounting thereof - G02B 3/0006: {Arrays (G02B3/02, G02B5/188 take precedence)} - G06T 2207/30041: Eye; Retina; Ophthalmic - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL ## Abstract A portable wavefront aberrometer is disclosed. In one embodiment, the portable wavefront aberrometer comprises a light source, a housing having first and second apertures formed therethrough, and a plurality of optical components disposed within the housing. The plurality of optical components are arranged to direct light generated by the light source to the first aperture via a first optical channel; direct light received into the housing through the second aperture to the first aperture via a second optical channel; and direct light received into the housing through the first aperture to a light detector via a third optical channel. ## Claims ### Claim 1 A portable wavefront aberrometer comprising: a light source; a housing having a first aperture and a second aperture formed therethrough; and a plurality of optical components disposed within the housing, the plurality of optical components comprising a first lens, a second lens, and an alignment target, the plurality of optical components being arranged to: direct light generated by the light source to the first aperture via a first optical channel without passing through any alignment target in the first optical channel; direct ambient light received into the housing through the second aperture and through a straight path through the first lens, the alignment target, and the second lens to define a second optical channel to the first aperture, wherein the alignment target is disposed between the first lens and the second lens at a focal point defined by the first lens and the second lens; and direct reflected light received into the housing through the first aperture to a light detector via a third optical channel. ### Claim 2 (depends on 1) The portable wavefront aberrometer of claim 1, wherein the alignment target comprises a transparent disc having a non-transparent mark formed thereon, wherein the alignment target is arranged such that the non-transparent mark is centered on an optical axis defined by the second optical channel. ### Claim 3 (depends on 1) The portable wavefront aberrometer of claim 1, wherein the plurality of optical components comprises a microlens array disposed within the third optical channel. ### Claim 4 (depends on 1) The portable wavefront aberrometer of claim 1, further comprising: an eye cup disposed on an exterior portion of the housing, wherein the eye cup surrounds the first aperture. ### Claim 5 (depends on 1) The portable wavefront aberrometer of claim 1, wherein the light source comprises a laser, and wherein the laser is disposed within the housing. ### Claim 6 (depends on 1) The portable wavefront aberrometer of claim 1, further comprising a battery port disposed within the housing, wherein the battery port is configured to electrically connect the battery to the light source when a battery is coupled to the battery port. ### Claim 7 (depends on 1) The portable wavefront aberrometer of claim 1, wherein the plurality of optical components further comprise a third lens and a fourth lens, wherein the directing of the reflected light through the first aperture to the light detector is through the third lens and the fourth lens to define the third optical channel. ### Claim 8 (depends on 7) The portable wavefront aberrometer of claim 7, wherein the first lens, the alignment target, and the second lens define the second optical channel along a second optical axis, wherein the third lens and the fourth lens define the third optical channel along a third optical axis. ### Claim 9 (depends on 1) The portable wavefront aberrometer of claim 1, further comprising a processing device, wherein the processing device is operatively coupled to the light detector. ### Claim 10 (depends on 9) The portable wavefront aberrometer of claim 9, wherein the processing device is further operatively coupled to the light source, wherein the processing device is configured to: activate the light source; receive image data captured by the light detector while the light source is activated; and store the image data in a memory. ### Claim 11 (depends on 10) The portable wavefront aberrometer of claim 10, wherein the processing device is further configured to: cause the image data stored in the memory to be transmitted to a mobile device. ### Claim 12 A portable wavefront aberrometer module comprising: a housing having a first aperture, a second aperture, and a third aperture formed therethrough; and a plurality of optical components disposed within the housing, the plurality of optical components comprising a first lens, a second lens, and an alignment target, the plurality of optical components being arranged to: direct light generated by a light source to the first aperture via a first optical channel without passing through any alignment target in the first optical channel; direct ambient light received into the housing through the second aperture and through a straight path through the first lens, the alignment target, and the second lens to define a second optical channel to the first aperture, wherein the alignment target is disposed between the first lens and the second lens at a focal point defined by the first lens and the second lens; and direct reflected light received into the housing through the first aperture to the third aperture via a third optical channel. ### Claim 13 (depends on 12) The portable wavefront aberrometer module of claim 12, wherein the alignment target comprises a transparent disc having a non-transparent mark formed thereon, wherein the alignment target is arranged such that the non-transparent mark is centered on an optical axis defined by the second optical channel. ### Claim 14 (depends on 12) The portable wavefront aberrometer module of claim 12, wherein the plurality of optical components comprises a microlens array disposed within the third optical channel. ### Claim 15 (depends on 12) The portable wavefront aberrometer module of claim 12, wherein: the housing comprises a port for removably coupling a mobile device to the housing, wherein a light detector of the mobile device is aligned with the third aperture when the mobile device is coupled to the housing. ### Claim 16 A method comprising: causing a light source housed within a housing to generate internally-produced light, wherein a plurality of optical components disposed in the housing are to direct the internally-produced light via a first optical channel without passing through any alignment target in the first optical channel; receiving externally-produced light into the housing via an aperture of the housing and through a straight path through a first lens, an alignment target, and a second lens to define a second optical channel, wherein the alignment target is disposed between the first lens and the second lens at a focal point defined by the first lens and the second lens; simultaneously directing the internally-produced light and the externally-produced light through the housing and to an eye of a patient; and capturing, with a light detector, reflected light from the eye of the patient. ### Claim 17 (depends on 16) The method of claim 16, further comprising: prior to capturing the reflected light, directing the reflected light through a microlens array. ### Claim 18 (depends on 16) The method of claim 16, further comprising: transmitting, by a processing device, the captured reflected light to a remote device for computing a patient-specific parameter comprising one or more of a Snellen fraction, a measurement of an optical aberration, or an eyeglasses prescription. ### Claim 19 (depends on 16) The method of claim 16, wherein the externally-produced light comprises light reflected off of an object located at least 4 meters from the aperture of the housing. ### Claim 20 (depends on 19) The method of claim 19, further comprising: directing the externally-produced light through the alignment target prior to the externally-produced light reaching the eye of the patient, wherein the reflected light corresponds to light reflected off of the eye of the patient as the patient is focusing on the object using the alignment target.