Ar lens stack see-through fiducials

Abstract

Embodiments of the present disclosure generally relate to an ophthalmic lens assembly including ophthalmic lenses having fiducials formed thereon. In some embodiments, a method of forming an ophthalmic lens assembly includes aligning one or more fiducials of a waveguide with one or more fiducials of a first ophthalmic lens. The method further includes coupling a first surface of the waveguide with a surface of the first ophthalmic lens. The method further includes aligning one or more fiducials of a second ophthalmic lens with the one or more fiducials of the waveguide and the first ophthalmic lens. The method further includes coupling a second surface of the waveguide with a surface of the second ophthalmic lens.

Description

44024978TW01AR LENS STACK SEE-THROUGH FIDUCIALSBACKGROUNDField

[0001] Embodiments of the present disclosure generally relate to an ophthalmic lens assembly including ophthalmic lenses having fiducials formed thereon.Description of the Related Art

[0002] Ophthalmic lens assemblies include an optical waveguide sandwiched between ophthalmic lenses. The ophthalmic lenses include a world-side lens attached to the world-side surface of the optical waveguide and an eye-side lens attached eye-side surface of the optical waveguide.

[0003] When stacking ophthalmic lenses it is imperative that the ophthalmic lenses are accurately aligned. Conventionally, to allow for machine stacking of ophthalmic lenses, laser marks and / or other fiducial markings are formed on the ophthalmic lenses for proper alignment. Alignment of the ophthalmic lenses can be conducted using an automated system having a series of machine view cameras and robotic arms to align the fiducial markings of the lenses. However, the size, shape, position, and optical power of the individual ophthalmic lenses can cause image distortion during the alignment of the components of an ophthalmic lens assembly. Such image distortion can complicate the alignment and / or assembly processes, resulting in improperly aligned ophthalmic lens assemblies.

[0004] Therefore, there is a need in the art for forming mechanical fiducials on world-side and eye-side lenses that allow for precise lens stacking during assembly.SUMMARY

[0005] Embodiments of the present disclosure generally relate to an ophthalmic lens assembly including ophthalmic lenses having fiducials formed thereon.44024978TW01

[0006] In some embodiments, a method of forming an ophthalmic lens assembly includes aligning one or more fiducials of a waveguide with one or more fiducials of a first ophthalmic lens. The one or more fiducials of the first ophthalmic lens are disposed on a portion of a perimeter of the first ophthalmic lens. The method further includes coupling a first surface of the waveguide with a surface of the first ophthalmic lens. The method further includes aligning one or more fiducials of a second ophthalmic lens with the one or more fiducials of the waveguide and the first ophthalmic lens. The one or more fiducials of the second ophthalmic lens are disposed on the portion of the perimeter of the second ophthalmic lens. The method further includes coupling a second surface of the waveguide with a surface of the second ophthalmic lens.

[0007] In some embodiments, an ophthalmic lens assembly includes a waveguide. The waveguide includes one or more fiducials disposed over a surface thereof. The ophthalmic lens assembly further includes a first ophthalmic lens coupled to a first surface of the waveguide. The first ophthalmic lens includes one or more fiducials disposed over the first ophthalmic lens. At least one of the fiducials disposed over the first ophthalmic lens is disposed over a portion of a perimeter of the first ophthalmic lens that is in alignment with one of the fiducials disposed over the surface of the waveguide. The ophthalmic lens assembly further includes a second ophthalmic lens coupled to a second surface of the waveguide opposite the first surface of the waveguide. The second ophthalmic lens includes one or more fiducials disposed over the second ophthalmic lens. At least one of the fiducials disposed over the second ophthalmic lens is disposed over the portion of the perimeter of the second ophthalmic lens that is in alignment with one of the fiducials disposed over the surface of the waveguide and the one of the fiducials of the first ophthalmic lens.

[0008] In some embodiments, an ophthalmic lens assembly includes a waveguide. The waveguide has one or more fiducials disposed on a surface thereof. The ophthalmic lens assembly further includes a first ophthalmic lens coupled to a first surface of the waveguide. The first ophthalmic lens includes one or more fiducials disposed on a surface of the first ophthalmic lens. At least one of the fiducials is in alignment with one of the fiducials disposed on the44024978TW01 surface of the waveguide. The ophthalmic lens assembly includes a second ophthalmic lens coupled to a second surface of the waveguide opposite the first surface of the waveguide. The second ophthalmic lens includes a lens shelf disposed around a portion of the surface perimeter of the second ophthalmic lens to provide an area of optical flatness. The second ophthalmic lens includes one or more fiducials disposed on a surface of the second ophthalmic lens, wherein at least one of the fiducials is disposed in the area of optical flatness and is in alignment with one of the fiducials disposed on the surface of the waveguide and one of the fiducials disposed on the surface of the first ophthalmic lens.BRIEF DESCRIPTION OF THE DRAWINGS

[0009] So that the manner in which the above recited features of the present disclosure can be understood in detail, a more particular description of the disclosure, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only typical embodiments of this disclosure and are therefore not to be considered limiting of its scope, for the disclosure may admit to other equally effective embodiments.

[0010] Figure 1 is a perspective, frontal view of a waveguide, according to an embodiment.

[0011] Figure 2 is a cross section view of an ophthalmic lens assembly, according to an embodiment.

[0012] Figure 3 is a schematic block diagram of a method for preparing an ophthalmic lens assembly, according to an embodiment.

[0013] Figure 4A is a cross-sectional view of an ophthalmic lens assembly, according to an embodiment.

[0014] Figure 4B is a partial cross-sectional view of an ophthalmic lens assembly, according to an embodiment.

[0015] Figure 4C is an illustration depicting machine vision cameras detecting a series of unique fiducial markings, according to an embodiment.44024978TW01

[0016] Figure 4D is an illustration depicting a stacked fiducial image as detected by machine vision cameras, according to an embodiment.

[0017] Figure 5A is a cross-sectional view of an ophthalmic lens assembly, according to an embodiment.

[0018] Figure 5B is a partial cross-sectional view of an ophthalmic lens assembly, according to an embodiment.

[0019] Figure 5C is an illustration depicting machine vision cameras detecting a series of unique fiducial markings, according to an embodiment.

[0020] Figure 5D is an illustration depicting a stacked fiducial image as detected by machine vision cameras, according to an embodiment.

[0021] To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. It is contemplated that elements disclosed in one embodiment may be beneficially utilized on other embodiments without specific recitation.DETAILED DESCRIPTION

[0022] Embodiments here relate to an ophthalmic lens assembly and corresponding methods including ophthalmic lenses having fiducials formed thereon to ensure the ophthalmic lenses are accurately aligned. More specifically, methods and lens components disclosed herein utilize the production of local regions of optical flatness to reduce image distortion during alignment operations. Such reductions in image distortion allow for more precise fiducial alignment during ophthalmic lens manufacture.

[0023] Figure 1 is a perspective, frontal view of a waveguide 100, according to one or more embodiments. It is to be understood that the waveguide 100 described herein is an exemplary waveguide and that other waveguides may be used with or modified to accomplish aspects of the present disclosure. The waveguide 100 includes a plurality of structures 102. The structures 102 may be disposed over, under, or on a surface 103 of a substrate 101 , or disposed in the substrate 101 . The structures 102 are nanostructures have a sub-micron critical dimension, e.g., a width less than 1 micrometer. Regions of the structures 102 correspond to one or more gratings 104. In one embodiment, which can be44024978TW01 combined with other embodiments described herein, the waveguide 100 includes at least a first grating 104a corresponding to an input coupling grating and a third grating 104c corresponding to an output coupling grating. In another embodiment, which can be combined with other embodiments described herein, the waveguide 100 further includes a second grating 104b. The second grating 104b corresponds to a pupil expansion grating or a fold grating.

[0024] Figure 2 is a cross section view of an ophthalmic lens assembly 200 in a first configuration, according an exemplary embodiment. In some embodiments, the ophthalmic lens assembly 200 includes the waveguide 100 coupled between ophthalmic lenses. In one or more embodiments, the ophthalmic lenses include a world-side lens 202 and an eye-side lens 204. The world-side lens 202 and / or the eye-side lens 204 may be coupled to the waveguide 100 via an adhesive 206. The adhesive 206 may include an optically transparent adhesive, an opaque adhesive, or a combination thereof. The adhesive 206 may be disposed around a portion of the surface perimeter 205 of either the world-side lens 202 and / or the eye-side lens 204 being coupled to the waveguide 100. In some embodiments, each of the waveguide 100, world-side lens 202, and the eye-side lens 204 independently include one or more fiducials 208 deposited on a surface thereof. The one or more fiducials 208 may include a marking disposed on a surface of the waveguide 100, world-side lens 202, and / or the eye-side lens 204 or within a cavity disposed in the waveguide 100, world-side lens 202, and / or the eye-side lens 204. In at least one embodiment, the cavity is machined, molded, embossed, stamped, etched, and / or engraved into the waveguide 100, world-side lens 202, and / or the eye-side lens 204.

[0025] In at least one embodiment, the waveguide 100 of the ophthalmic lens assembly 200 includes one or more fiducials 208, such as a first fiducial 210a and a second fiducial 210b. Each of the one or more fiducials 208 of the waveguide 100 may be deposited onto either the world-side surface 201 a and / or the eye-side surface 201 b of the waveguide 100. Each of the one or more fiducials 208 of the waveguide 100 may be etched into the surface of the waveguide 100 or within a cavity disposed in the waveguide 100. In at least one44024978TW01 embodiment, the cavity is machined, molded, embossed, stamped, etched, and / or engraved into the waveguide 100.

[0026] In at least one embodiment, the world-side lens 202 of the ophthalmic lens assembly 200 includes one or more fiducials 208, such as a first fiducial 212a and a second fiducial 212b. The first fiducial 212a and the second fiducial 212b are disposed over a surface perimeter 205 of the world-side lens 202. Each of the one or more fiducials 208 of the world-side lens 202 may be deposited onto either the world-side surface 202a and / or the eye-side surface 202b of the worldside lens 202. Each of the one or more fiducials 208 of the world-side lens 202 may be etched into the surface of the world-side lens 202 or within a cavity disposed in the world-side lens 202. In at least one embodiment, the cavity is machined, molded, embossed, stamped, etched, and / or engraved into the worldside lens 202.

[0027] In at least one embodiment, the eye-side lens 204 of the ophthalmic lens assembly 200 includes one or more fiducials 208, such as a first fiducial 214a and a second fiducial 214b. Each of the one or more fiducials 208 of the eye-side lens 204 may be deposited onto either the world-side surface 204a and / or the eye-side surface 204b of the eye-side lens 204. Each of the one or more fiducials 208 of the eye-side lens 204 may be etched into the surface of the eye-side lens 204 or within a cavity disposed in the eye-side lens 204. In at least one embodiment, the cavity is machined, molded, embossed, stamped, etched, and / or engraved into the eye-side lens 204.

[0028] In some embodiments, each of the one or more one or more fiducials 208 of the ophthalmic lens assembly 200 are unique per substrate and stackable. That is to say that the first fiducial 210a and second fiducial 210b of the waveguide 100, the first fiducial 212a and the second fiducial 212b of the worldside lens 202, and the first fiducial 214a and the second fiducial 214b of the eyeside lens 204 are each independently unique. The first fiducial 210a and second fiducial 210b are disposed over a portion of the surface perimeter 205 of the waveguide 100. Furthermore, the first fiducial 210a and second fiducial 210b of the waveguide 100, the first fiducial 212a and the second fiducial 212b of the world-side lens 202, and the first fiducial 214a and the second fiducial 214b of44024978TW01 the eye-side lens 204 do not occlude each other when properly aligned. The first fiducial 214a and the second fiducial 214b are disposed over a portion of the surface perimeter 205 of the eye-side lens 204.

[0029] Figure 3 illustrates a process flow diagram of a method 300 for preparing an ophthalmic lens assembly (e.g., the ophthalmic lens assembly 200), according to an embodiment. Generally, the method 300 includes an alignment operation 310 to align the one or more fiducials 208 of the waveguide 100 with the one or more fiducials of a first ophthalmic lens (e.g., the world-side lens 202 or the eye-side lens 204). For instance, the first fiducial 210a of the waveguide 100 may be aligned with the first fiducial 212a of the world-side lens 202 and the second fiducial 210b of the waveguide 100 may be aligned with the second fiducial 212b of the world-side lens 202. Alternatively, the first fiducial 210a of the waveguide 100 may be aligned with the first fiducial 214a of the eye-side lens 204 and the second fiducial 210b of the waveguide 100 may be aligned with the second fiducial 214b the eye-side lens 204.

[0030] In some embodiments, the one or more fiducials 208 of the ophthalmic lens assembly (e.g., the ophthalmic lens assembly 200) may be aligned using suitable automated alignment device that aligns the one or more fiducials 208 prior to performing a coupling operation. The automated alignment device may include a series of machine vision cameras and / or robotic grippers to position / orient the components of the ophthalmic lens assembly (e.g., the ophthalmic lens assembly 200) accordingly. In some embodiments, the machine vision cameras are oriented as a top-down and / or bottom / up cross-sectional view of the ophthalmic lens assembly (e.g., the ophthalmic lens assembly 200) such that the one or more fiducials 208 of each of the components of the ophthalmic lens assembly (e.g., the waveguide 100, world-side lens 202, and the eye-side lens 204) are optically detectable. The robotic grippers may move any one or more of the components of the ophthalmic lens assembly (e.g., the waveguide 100, world-side lens 202, and the eye-side lens 204) in accordance to the signal provided by the machine vision cameras monitoring the alignment of the one or more fiducials 208.44024978TW01

[0031] Once aligned, the first ophthalmic lens (e.g., the world-side lens 202 or the eye-side lens 204) may be coupled to the waveguide 100 via a coupling operation 320. The coupling operation may include applying an adhesive 206 to one of either the first ophthalmic lens or the waveguide 100 and coupling the two components of the ophthalmic lens assembly (e.g., the ophthalmic lens assembly 200). The adhesive 206 may include any suitable adhesive material, such as an optically transparent resin and / or topcoat. The adhesive 206 may include an optically transparent adhesive, an opaque adhesive, or a combination thereof. For example, an optically transparent adhesive may be used in instances and / or locations when / where it is desirable to image through the adhesive 206.

[0032] The method 300 further includes a second alignment operation (e.g., operation 330) to align the one or more fiducials 208 of the waveguide 100 with the one or more fiducials of a second ophthalmic lens (e.g., the world-side lens 202 or the eye-side lens 204). For instance, the first fiducial 210a of the waveguide 100 may be aligned with the first fiducial 212a of the world-side lens 202 and the second fiducial 210b of the waveguide 100 may be aligned with the second fiducial 212b the world-side lens 202. Alternatively, the first fiducial 210a of the waveguide 100 may be aligned with the first fiducial 214a of the eye-side lens 204 and the second fiducial 210b of the waveguide 100 may be aligned with the second fiducial 214b the eye-side lens 204.

[0033] Once aligned, the second ophthalmic lens (e.g., the world-side lens 202 or the eye-side lens 204) may be coupled to the waveguide 100 via a second coupling operation (e.g., operation 340). The coupling operation may include applying an adhesive 206 to one of either the first ophthalmic lens or the waveguide 100 and coupling the two components of the ophthalmic lens assembly (e.g., the ophthalmic lens assembly 200). The adhesive 206 may include any suitable adhesive material, such as an optically transparent resin and / or topcoat. The adhesive 206 may include an optically transparent adhesive, an opaque adhesive, or a combination thereof.

[0034] In at least one embodiment, alignment operation 310 and operation 330 are performed simultaneously or sequentially. In at least one embodiment,44024978TW01 coupling operation 320 and operation 340 are performed simultaneously or sequentially.

[0035] Figure 4A illustrates a cross-sectional view of an ophthalmic lens assembly 200 undergoing the alignment operation (310 and / or 330) to align one or more of the first fiducials (210a, 212a and / or 212a) or the one or more second fiducials (210b, 212b, and / or 214b). As previously discussed, an automated alignment device 400 having a series of machine vision cameras (e.g., camera 402a and camera 402b) may be used to enhance the alignment of the one or more fiducials 208 of the components of the ophthalmic lens assembly 200 (e.g., the waveguide 100, world-side lens 202, and the eye-side lens 204) prior to performing a coupling operation.

[0036] The machine vision cameras (e.g., camera 402a and camera 402b) may be oriented to provide top-down and / or bottom / up cross-sectional view of the ophthalmic lens assembly 200 such that the one or more fiducials 208 of each of the components of the ophthalmic lens assembly (e.g., the waveguide 100, worldside lens 202, and the eye-side lens 204) are optically detectable. While the machine vision cameras (e.g., camera 402a and camera 402b) are described herein to be oriented to provide top-down and / or bottom / up cross-sectional view of the ophthalmic lens assembly 200, one of ordinary skill in the art would understand that any suitable orientation of the machine vision cameras (e.g., camera 402a and camera 402b) may be appropriate for an intended application. In at least one embodiment, camera 402a and camera 402b are in communication and are independently able to move over the surface of the ophthalmic lens assembly 200 to detect the various components of the ophthalmic lens assembly 200 and individual aspects thereof. In at least one embodiment, camera 402a and camera 402b are in communication and are able to move in tandem over the surface of the ophthalmic lens assembly 200 to detect the various components of the ophthalmic lens assembly 200 and individual aspects thereof. In at least one embodiment, the ophthalmic lens assembly 200 is configured to move independently of the machine vision cameras (e.g., camera 402a and camera 402b) such that the machine vision cameras (e.g., camera44024978TW01402a and camera 402b) are able to detect the various components of the ophthalmic lens assembly 200 and individual aspects thereof.

[0037] The automated alignment device 400 may further include a controller 405 for controlling processes performed by the automated alignment device 400. The controller 405 can be any type of controller used in an industrial setting, such as a programmable logic controller (PLC). The controller 405 includes a processor 407, a memory 406, and input / output (I / O) circuits 408. The controller 405 can further include one or more of the following components (not shown), such as one or more power supplies, clocks, communication components (e.g., network interface card), and user interfaces typically found in controllers for semiconductor equipment.

[0038] The memory 406 can include non-transitory memory. The non- transitory memory can be used to store the programs and settings described below. The memory 406 can include one or more readily available types of memory, such as read only memory (ROM) (e.g., electrically erasable programmable read-only memory (EEPROM), flash memory, floppy disk, hard disk, or random access memory (RAM) (e.g., non-volatile random access memory (NVRAM).

[0039] The processor 407 is configured to execute various programs stored in the memory 406, such as a program configured to execute the method 300 described in reference to FIG. 3. During execution of these programs, the controller 405 can communicate to I / O devices through the I / O circuits 408. For example, during execution of these programs and communication through the I / O circuits 408, the controller 405 can control outputs (e.g., the machine vision cameras and / or robotic grippers to position / orient the components of the ophthalmic lens assembly). The memory 106 can further include various operational settings used to control the automated alignment device 400.

[0040] Figure 4B illustrates a partial cross-sectional view of an ophthalmic lens assembly 200 undergoing the alignment operation (e.g., operation 310 and / or operation 330) to align one or more of the first fiducials (210a, 212a and / or 212a) prior to undergoing the coupling operation (e.g., operation 320 and / or operation 340). Figure 4C is an illustration depicting the machine vision cameras (e.g.,44024978TW01 camera 402a and camera 402b) detecting a unique fiducial marking 410a of a first fiducial 210a disposed on the waveguide 100, a unique fiducial marking 412a of a first fiducial 212a disposed on the world-side lens 202, and a unique fiducial marking 414a of a first fiducial 214a disposed on the eye-side lens 204 during the alignment operation (e.g., operation 310 and / or operation 330). Figure 4D is an illustration depicting a stacked fiducial image 450 as detected by the machine vision cameras (e.g., camera 402a and camera 402b), according to an embodiment.

[0041] The size, shape, position, and optical power of the world-side lens 202 and the eye-side lens 204 should be all be considered when preparing ophthalmic lenses, as such aspects can make continued imaging of fiducials disposed thereon difficult as ophthalmic lens is assembled. For instance, such aspects can cause image distortion as a function of optical power and position of the lenses. Such image distortion may be problematic during the alignment operations (e.g., operation 310 and / or operation 330), as is illustrated in Figure 4D.

[0042] The first fiducial 212a and the second fiducial 212b are disposed over a surface perimeter 205 of the world-side lens 202. The first fiducial 210a and second fiducial 210b are disposed over a portion of the surface perimeter 205 of the waveguide 100. The first fiducial 214a and the second fiducial 214b are disposed over a portion of the surface perimeter 205 of the eye-side lens 204.

[0043] Figure 5A illustrates a cross-sectional view of an ophthalmic lens assembly 500 undergoing the alignment operation (e.g., operation 310 and / or operation 330) to align one or more of the first fiducials (210a, 212a and / or 212a) or the one or more second fiducials (210b, 212b, and / or 214b). As previously discussed, an automated alignment device having a series of machine vision cameras (e.g., camera 402a and camera 402b) may be used to enhance the alignment of the one or more fiducials 208 of the components of the ophthalmic lens assembly 500 (e.g., the waveguide 100, world-side lens 202, and the eyeside lens 204) prior to performing a coupling operation. In some embodiments, the ophthalmic lens assembly 500 includes a world-side lens shelf 502 and / or an eye-side lens shelf 504 (e.g., a piano surface). In at least one embodiment, the ophthalmic lens assembly 500 includes one or more world-side lens shelves 502,44024978TW01 such as a first world-side lens shelf 502a and a second world-side lens shelf 502b, disposed around a portion of the surface perimeter (e.g., surface perimeter 205 as shown in Figure 2) of the world-side lens 202. In at least one embodiment, the ophthalmic lens assembly 500 includes one or more eye-side lens shelves 504, such as a first eye-side lens shelf 504a and a second eye-side lens shelf 504b, disposed around a portion of the surface perimeter (e.g., surface perimeter 205 as shown in Figure 2) of the eye-side lens 204. The first fiducial 212a and the second fiducial 212b are disposed over a surface perimeter 205 of the world-side lens 202. The first fiducial 210a and second fiducial 210b are disposed over a portion of the surface perimeter 205 of the waveguide 100. The first fiducial 214a and the second fiducial 214b are disposed over a portion of the surface perimeter 205 of the eye-side lens 204.

[0044] The world-side lens shelf 502 may be disposed around a portion of the surface perimeter (e.g., surface perimeter 205 as shown in Figure 2) opposite the surface of the world-side lens 202 wherein the one or more fiducials are disposed (e.g., the first fiducial 212a and second fiducial 212b). The eye-side lens shelf 504 may be disposed around a portion of the surface perimeter (e.g., surface perimeter 205 as shown in Figure 2) opposite the surface of the eye-side lens 204 wherein the one or more fiducials are disposed (e.g., the first fiducial 214a and second fiducial 214b). In at least one embodiment, one or more fiducials are independently disposed in the world-side lens shelf 502 and / or an eye-side lens shelf 504. In some embodiments, the world-side lens shelf 502 and / or the eyeside lens shelf 504 are formed via any suitable manufacturing technique, such as machining.

[0045] The machine vision cameras (e.g., camera 402a and camera 402b) may be oriented to provide top-down and / or bottom / up cross-sectional view of the ophthalmic lens assembly 500 such that the one or more fiducials 208 of each of the components of the ophthalmic lens assembly (e.g., the waveguide 100, worldside lens 202, and the eye-side lens 204) are optically detectable. While the machine vision cameras (e.g., camera 402a and camera 402b) are described herein to be oriented to provide top-down and / or bottom / up cross-sectional view of the ophthalmic lens assembly 200, one of ordinary skill in the art would44024978TW01 understand that any suitable orientation of the machine vision cameras (e.g., camera 402a and camera 402b) may be appropriate for an intended application. In at least one embodiment, camera 402a and camera 402b are in communication and are independently able to move over the surface of the ophthalmic lens assembly 500 to detect the various components of the ophthalmic lens assembly 500 and individual aspects thereof. In at least one embodiment, camera 402a and camera 402b are in communication and are able to move in tandem over the surface of the ophthalmic lens assembly 500 to detect the various components of the ophthalmic lens assembly 500 and individual aspects thereof.

[0046] Figure 5B illustrates a partial cross-sectional view of an ophthalmic lens assembly 500 undergoing the alignment operation (e.g., operation 310 and / or operation 330) to align one or more of the first fiducials (210a, 212a and / or 212a) prior to undergoing the coupling operation (e.g., operation 320 and / or operation 330). Figure 5C is an illustration depicting the machine vision cameras (e.g., camera 402a and camera 402b) detecting a unique fiducial marking 410a of a first fiducial 210a disposed on the waveguide 100, a unique fiducial marking 412a of a first fiducial 212a disposed on the world-side lens 202, and a unique fiducial marking 414a of a first fiducial 214a disposed on the eye-side lens 204 during the alignment operation (e.g., operation 310 and / or operation 330). Figure 5D is an illustration depicting a stacked fiducial image 550 as detected by the machine vision cameras (e.g., camera 402a and camera 402b), according to an embodiment.

[0047] As previously discussed, the size, shape, position, and optical power of the world-side lens 202 and the eye-side lens 204 should be considered during assembly of ophthalmic lenses, as these aspects can cause image distortion and affect proper lens alignment. Without being bound by theory, the world-side lens shelf 502 and / or an eye-side lens shelf 504 of the ophthalmic lens assembly 500 provide an area of optical flatness by which the machine vision cameras (e.g., camera 402a and camera 402b) can image through without aberrations caused by the ophthalmic surfaces. That is to say that the local regions of optical flatness provided by the world-side lens shelf 502 and / or an eye-side lens shelf 504 allow44024978TW01 for more accurate fiducial alignment when positioned congruent with / to the fiducials disposed on the world-side lens 202 (e.g., 212a and / or 212b) and the fiducials disposed on the eye-side lens 204 (e.g., 214a and / or 214b). This is further exemplified in Figure 5D, wherein the stacked fiducial image 550 includes each of the unique fiducial markings (e.g., 410a, 412a, and 414a) in an exemplary orientation (e.g., optical alignment) that would be detected by the machine vision cameras (e.g., camera 402a and camera 402b).

[0048] Overall, the methods disclosed herein provide a route to align components of an ophthalmic lens assembly prior to conducting a coupling operation. Such methods utilize ophthalmic lenses having optical shelves disposed on their peripheries to produce local regions of optical flatness. Such regions of optical flatness do not cause image distortion during the alignment operations. As such, the fiducial markings of the components of the ophthalmic lens (e.g., a waveguide, a world-side lens, and an eye-side lens) are able to be precisely aligned via imaging with machine view cameras.

[0049] While the foregoing is directed to embodiments of the present disclosure, other and further embodiments of the disclosure may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims

44024978TW01We claim:1 . A method of forming an ophthalmic lens assembly, the method comprising: aligning one or more fiducials of a waveguide with one or more fiducials of a first ophthalmic lens, the one or more fiducials of the first ophthalmic lens are disposed on a portion of a perimeter of the first ophthalmic lens; coupling a first surface of the waveguide with a surface of the first ophthalmic lens; aligning one or more fiducials of a second ophthalmic lens with the one or more fiducials of the waveguide and the first ophthalmic lens, the one or more fiducials of the second ophthalmic lens are disposed on the portion of the perimeter of the second ophthalmic lens; and coupling a second surface of the waveguide with a surface of the second ophthalmic lens.

2. The method of claim 1 , wherein the first ophthalmic lens comprises a lens shelf disposed around the portion of the perimeter of the first ophthalmic lens.

3. The method of claim 2, wherein the one or more fiducials of the first ophthalmic lens are disposed on a first surface of the first ophthalmic lens and the lens shelf is disposed on a second surface of the first ophthalm ic lens opposite the first surface.

4. The method of claim 2, wherein the one or more fiducials of the first ophthalmic lens are disposed on a surface of the lens shelf of the first ophthalmic lens.

5. The method of claim 1 , wherein the first ophthalmic lens comprises a first fiducial and a second fiducial disposed on a first surface and a first lens shelf and a second lens shelf disposed on a second surface opposite the first surface.44024978TW016. The method of claim 1 , wherein the second ophthalmic lens comprises a lens shelf disposed around the portion of the perimeter of the second ophthalmic lens.

7. The method of claim 6, wherein the one or more fiducials of the second ophthalmic lens are disposed on a first surface of the first ophthalmic lens and the lens shelf is disposed on a second surface of the second ophthalmic lens opposite the first surface.

8. The method of claim 6, wherein the one or more fiducials of the first ophthalmic lens are disposed on a surface of the lens shelf of the first ophthalmic lens.

9. The method of claim 1 , wherein the second ophthalmic lens comprises a first fiducial and a second fiducial disposed on a first surface and a first lens shelf and a second lens shelf disposed on a second surface opposite the first surface.

10. An ophthalmic lens assembly, comprising: a waveguide, the waveguide having one or more fiducials disposed over a surface thereof; a first ophthalmic lens coupled to a first surface of the waveguide, the first ophthalmic lens comprising: one or more fiducials disposed over the first ophthalmic lens, wherein at least one of the fiducials disposed over the first ophthalmic lens is disposed over a portion of a perimeter of the first ophthalmic lens that is in alignment with one of the fiducials disposed over the surface of the waveguide; and a second ophthalmic lens coupled to a second surface of the waveguide opposite the first surface of the waveguide, the second ophthalmic lens comprising: one or more fiducials disposed over the second ophthalmic lens, wherein at least one of the fiducials disposed over the second ophthalmic lens is disposed over the portion of the perimeter of the second ophthalmic44024978TW01 lens that is in alignment with one of the fiducials disposed over the surface of the waveguide and the one of the fiducials of the first ophthalmic lens.11 . The ophthalmic lens assembly of claim 10, wherein the second ophthalmic lens further comprises a lens shelf disposed around the portion of the perimeter of the second ophthalmic lens to provide an area of optical flatness.

12. The ophthalmic lens assembly of claim 11 , wherein at least one of the fiducials disposed over the second ophthalmic lens is disposed in an area of flatness provided by the lens shelf disposed on the second ophthalmic lens.

13. The ophthalmic lens assembly of claim 10, wherein the first ophthalmic lens comprises a first fiducial in alignment with a first fiducial of the waveguide and a second fiducial in alignment with a second fiducial of the waveguide.

14. The ophthalmic lens assembly of claim 10, wherein the second ophthalmic lens comprises a first fiducial in alignment with a first fiducial of the waveguide and a second fiducial in alignment with a second fiducial of the waveguide.

15. An ophthalmic lens assembly, comprising: a waveguide, the waveguide having one or more fiducials disposed on a surface thereof; a first ophthalmic lens coupled to a first surface of the waveguide, the first ophthalmic lens comprising: one or more fiducials disposed on a surface of the first ophthalmic lens, wherein at least one of the fiducials is in alignment with one of the fiducials disposed on the surface of the waveguide; and a second ophthalmic lens coupled to a second surface of the waveguide opposite the first surface of the waveguide, the second ophthalmic lens comprising: a lens shelf disposed around a portion of a surface perimeter of the second ophthalmic lens to provide an area of optical flatness, and44024978TW01 one or more fiducials disposed on a surface of the second ophthalmic lens, wherein at least one of the fiducials is disposed in the area of optical flatness and is in alignment with one of the fiducials disposed on the surface of the waveguide and one of the fiducials disposed on the surface of the first ophthalmic lens.

16. The ophthalmic lens assembly of claim 15, wherein the first ophthalmic lens comprises a lens shelf disposed around a portion of a surface perimeter of the first ophthalmic lens to provide an area of optical flatness.

17. The ophthalmic lens assembly of claim 15, wherein at least one of the fiducials disposed on the surface of the first ophthalmic lens is disposed in the area of optical flatness provided by the lens shelf disposed on the first ophthalmic lens.

18. The ophthalmic lens assembly of claim 15, wherein the first ophthalmic lens comprises a first fiducial in alignment with a first fiducial of the waveguide and a second fiducial in alignment with a second fiducial of the waveguide.

19. The ophthalmic lens assembly of claim 15, wherein the second ophthalmic lens comprises a first fiducial in alignment with a first fiducial of the waveguide and a second fiducial in alignment with a second fiducial of the waveguide.

20. The ophthalmic lens assembly of claim 15, wherein each of the waveguide, the first ophthalmic lens, and the second ophthalmic lens individually include a first fiducial and a second fiducial, wherein: each of the first fiducial is in alignment, and each of the second fiducial is in alignment.

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