# US 12,111,473 B2 · Optical systems for head-worn computers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,111,473 B2 - Document ID: US12111473B2 - Status: Granted - Kind: B2 - Application number: 18/165,851 - Filed: 2023-02-07 - Published: 2023-06-22 - Granted: 2024-10-08 - Earliest claimed: 2016-09-08 - Assignees: Mentor Acquisition One, LLC - Applicants: Mentor Acquisition One, LLC - Inventors: Edward H Nortrup; John N. Border; John D. Haddick - Web page: https://patentgrep.com/patent/US12111473B2 ## CPC - G02B 27/0172: {characterised by optical features} - G02B 5/04: Prisms - G02B 27/0093: {with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking} - G02B 2027/0112: {comprising device for genereting colour display} - G02B 2027/0138: {comprising image capture systems, e.g. camera} - G02B 2027/0178: {Eyeglass type (eyeglass details G02C)} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract Aspects of the present disclosure relate a head-worn computer with a see-through display wherein computer content is presented to a user wearing the head-worn computer and through which the user sees a surrounding environment, wherein the see-through display generates image light comprised of narrow bandwidths of red, green and blue light and wherein the see-through display further includes a tristimulus notch mirror positioned to reflect the image light towards the user's eye, and wherein the tristimulus notch mirror reflects less than a full width half max of the red image light. ## Claims ### Claim 1 A wearable device, comprising: a light source configured to generate image light comprising a first bandwidth of light, the first bandwidth of light centered at a first frequency, the light source comprising a color source; a see-through display configured to present the image light to a user, the see-through display comprising a mirror configured to: direct the image light towards an eye of the user; and transmit environmental light, wherein: the image light does not comprise the environmental light, the environmental light comprises a second bandwidth centered at a second frequency, and the second frequency differs from the first frequency by less than a threshold frequency; and one or more filters, the one or more filters configured to apply a bandpass filter to an output of the color source to transmit the first bandwidth of light. ### Claim 2 (depends on 1) The wearable device of claim 1, wherein the light source comprises a light emitting diode (LED). ### Claim 3 (depends on 1) The wearable device of claim 1, further comprising: a first optics module comprising the light source; and a second optics module comprising the mirror, wherein the light source is configured to project the image light from the first optics module to the second optics module. ### Claim 4 (depends on 1) The wearable device of claim 1, wherein the mirror comprises a holographic mirror. ### Claim 5 (depends on 1) The wearable device of claim 1, wherein the mirror comprises a notch mirror. ### Claim 6 (depends on 1) The wearable device of claim 1, wherein the mirror comprises a curved surface. ### Claim 7 (depends on 1) The wearable device of claim 1, wherein the environmental light comprises light emitted by an artificial light source and the second frequency corresponds to a frequency of the artificial light source. ### Claim 8 (depends on 7) The wearable device of claim 7, wherein the artificial light source comprises a traffic control signal. ### Claim 9 (depends on 7) The wearable device of claim 7, wherein the artificial light source comprises a vehicle light source. ### Claim 10 (depends on 1) The wearable device of claim 1, wherein the first frequency equals the second frequency. ### Claim 11 (depends on 1) The wearable device of claim 1, wherein: the first bandwidth has a full width at half maximum (FWHM) equal to a first value, and the second bandwidth has a FWHM equal to a second value less than the first value. ### Claim 12 A method comprising: generating, via a light source of a wearable head device, image light comprising a first bandwidth of light, the first bandwidth of light centered at a first frequency, the light source comprising a color source; presenting, via a see-through display of the wearable head device, the image light to a user of the wearable head device, the see-through display comprising a mirror; directing, via the mirror, the image light towards an eye of the user; transmitting, via the mirror, environmental light, wherein: the image light does not comprise the environmental light, the environmental light comprises a second bandwidth centered at a second frequency, and the second frequency differs from the first frequency by less than a threshold frequency; and applying, via one or more filters of the wearable head device, a bandpass filter to an output of the color source to transmit the first bandwidth of light. ### Claim 13 (depends on 12) The method of claim 12, wherein the light source comprises an LED. ### Claim 14 (depends on 12) The method of claim 12, wherein the wearable device further comprises: a first optics module comprising the light source; and a second optics module comprising the mirror, wherein the method further comprises projecting, via the light source, the image light from the first optics module to the second optics module. ### Claim 15 (depends on 12) The method of claim 12, wherein the mirror comprises a notch mirror. ### Claim 16 (depends on 12) The method of claim 12, wherein the environmental light comprises light emitted by an artificial light source and the second frequency corresponds to a frequency of the artificial light source. ### Claim 17 (depends on 16) The method of claim 16, wherein the artificial light source comprises a traffic control signal. ### Claim 18 (depends on 16) The method of claim 16, wherein the artificial light source comprises a vehicle light source. ### Claim 19 (depends on 12) The method of claim 12, wherein the first frequency equals the second frequency. ### Claim 20 (depends on 12) The method of claim 12, wherein: the first bandwidth has a FWHM equal to a first value, and the second bandwidth has a FWHM equal to a second value less than the first value.