# US 10,481,397 B2 · Spectacle lens and display device with such a spectacle lens > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,481,397 B2 - Document ID: US10481397B2 - Status: Granted - Kind: B2 - Application number: 14/907,534 - Filed: 2014-07-25 - Published: 2016-06-23 - Granted: 2019-11-19 - Earliest claimed: 2013-07-26 - Assignees: tooz technologies GmbH - Applicants: Carl Zeiss Smart Optics GmbH - Inventors: Hans-Juergen Dobschal; Karsten Lindig - Web page: https://patentgrep.com/patent/US10481397B2 ## CPC - G02B 27/0172: {characterised by optical features} - G02B 27/017: {Head mounted} - G02B 27/30: Collimators - G02C 7/086: {Auxiliary lenses located directly on a main spectacle lens or in the immediate vicinity of main spectacles} - G02B 27/0176: {characterised by mechanical features} - G02B 2027/011: {comprising device for correcting geometrical aberrations, distortion} - G02B 2027/0118: {comprising devices for improving the contrast of the display / brillance control visibility} - G02B 2027/0125: {Field-of-view increase by wavefront division} - G02B 2027/0178: {Eyeglass type (eyeglass details G02C)} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G02C: SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES (trial frames for testing the eyes A61B3/04; goggles or eyeshields not having the same features as spectacles A61F9/00) ## Abstract A spectacle lens is provided for an image-generating display device that can be fitted on the head of a user, wherein, in order to reduce vignetting occurring when guiding the generated image, which is coupled into the spectacle lens via the coupling-in section and guided through the spectacle lens by means of reflections as far as a coupling-out section, the curvature profile of the front and/or rear side in the edge area differs from the corresponding predetermined curvature profile of the front and/or rear side in the edge area such that there is a greater thickness of the spectacle lens in the edge area in comparison with the thickness in the edge area that would result due to the predetermined curvature profile. ## Claims ### Claim 1 A spectacle lens for an image-generating display device that can be fitted on the head of a user and generate an image, comprising: a single lens element defining a curved front side and a curved rear side, and, when the single lens element is viewed from above, a coupling-in section in an edge area of the single lens element and a coupling-out section spaced apart therefrom, wherein a thickness dimension is defined as spanning between the curved front side and curved rear side, wherein the curved rear side has a curvature profile such that it corrects a vision defect of the user when looking through the single lens element, wherein the single lens element is configured to couple the generated image into the single lens element via the coupling-in section of the single lens element, and to guide the generated image in the single lens element by reflections at the front side and the rear side of the single lens element as far as the coupling-out section and to couple the generated image out of the single lens element via the coupling-out section to an exit pupil in which the user's eye is to be positioned for perceiving the coupled-out image, wherein the coupling-out section is located within a center area of the lens defined within an angle of 40 degrees of a center point of the single lens element as measured from the exit pupil, wherein, in order to reduce vignetting occurring when the generated image is guided via the coupling-in section through the single lens element as far as the coupling-out section, the thickness dimension in the edge area is larger in comparison to the thickness dimension elsewhere in the spectacle lens, and wherein the single lens element has a refractive power not equal to zero. ### Claim 2 (depends on 1) The spectacle lens according to claim 1, wherein the single lens element has the greater thickness in the edge area as compared to the coupling-out section. ### Claim 3 (depends on 1) The spectacle lens according to claim 1, wherein the edge area with the greater thickness, when the single lens element is viewed from above, extends annularly. ### Claim 4 (depends on 1) The spectacle lens according to claim 1, wherein the edge area with the greater thickness, when the single lens element is viewed from above, extends in the circumferential direction of the single lens element along only a part of the circumference and not along the entire circumference. ### Claim 5 (depends on 1) The spectacle lens according to claim 1, wherein at least one of the coupling-in and coupling-out sections has an imaging effect. ### Claim 6 (depends on 1) The spectacle lens according to claim 1, wherein the coupling-in section has a collimation effect. ### Claim 7 (depends on 1) The spectacle lens according to claim 1, wherein at least one of the coupling-in and coupling-out section provides a folding of the beam path. ### Claim 8 (depends on 1) The spectacle lens according to claim 1, wherein at least one of the curved front side and a curved rear side define a non-spherical surface. ### Claim 9 (depends on 1) The spectacle lens according to claim 1, wherein the edge area spans an arc of less than 40° from an end of the single lens element as measured from the exit pupil. ### Claim 10 (depends on 1) The spectacle lens according to claim 1, wherein the coupling-in section comprises an area of an end face of the single lens element connecting the front and rear sides. ### Claim 11 (depends on 10) The spectacle lens according to claim 10, wherein the area of the end face has an imaging effect. ### Claim 12 (depends on 1) The spectacle lens according to claim 1, wherein the coupling-in section is at least one of refractive and reflective. ### Claim 13 (depends on 1) A display device, comprising: a holder that can be fitted on the head of a user; an image-generating module which generates an image and is secured to the holder; and an imaging optical system which is secured to the holder and which has a spectacle lens according to claim 1 and which, when the holder is fitted on the head of the user, images the generated image such that the user can perceive it as a virtual image. ### Claim 14 (depends on 13) The display device according to claim 13, wherein the imaging optical system has collimation optics which are arranged between the spectacle lens and the imaging system module. ### Claim 15 (depends on 13) The display device according to claim 13, wherein the imaging optical system has a refractive power not equal to zero. ### Claim 16 (depends on 14) The display device according to claim 14, wherein the imaging optical system has a refractive power not equal to zero. ### Claim 17 (depends on 13) The display device according to claim 13, wherein the spectacle lens is a single lens element. ### Claim 18 (depends on 1) The spectacle lens according to claim 1, wherein the edge area is designed such that an imaging error of the single lens element, which occurs when the generated image is guided from the coupling-in section to the coupling-out section through the single lens element, is corrected. ### Claim 19 (depends on 1) The spectacle lens according to claim 1, wherein the spectacle lens is said single lens element.