TW202314323A - Apparatus, system, and method for selectively compensating for corrective lenses applied to display devices during testing - Google Patents

Abstract

An apparatus comprising (1) a conoscope configured to receive an image emitted by a display device through a corrective lens, (2) a variable compensation element coupled to the conoscope, wherein the variable compensation element is capable of selectively modifying the image emitted by the display device to compensate for an optical effect imparted by the corrective lens on the image, and (3) a controller coupled to the variable compensation element, wherein the controller (1) receives a compensation parameter representative of the optical effect imparted by the corrective lens on the image, (2) selects, based at least in part on the compensation parameter, a feature of the variable compensation element that compensates for the optical effect, and (3) causing the feature of the variable compensation element to be applied to the image. Various other apparatuses, systems, and methods are also disclosed.

Description

Apparatus, system and method for selectively compensating a corrective lens applied to a display device during testing

The present invention generally relates to apparatus, systems and methods for selectively compensating for corrective lenses applied to a display device during testing.

incorporated by reference

This application claims priority under 35 U.S.C. §119(e) to U.S. Provisional Application No. 63/212,260, filed June 18, 2021, and U.S. Non-Provisional Application No. 17/721,760, filed April 15, 2022 rights, the content of which is incorporated herein by reference in its entirety.

In some examples, a display of an augmented reality/virtual reality (AR/VR) device may emit collimated light toward a user's eyes. In some AR/VR devices, prescription lenses may be placed between the user's eyes and the AR/VR display to correct defects and/or refractive errors in the user's eyes. Unfortunately, such prescription lenses are typically not easily removable. Furthermore, such prescription lenses can present difficulties related to characterizing AR/VR display performance through metrics like modulation transfer function (MTF) and/or display color uniformity. The MTF of an AR/VR display can represent resolution properties and/or quantify the sharpness of the display at different spatial frequencies.

In one aspect, an apparatus is disclosed that includes: a conoscopic lens configured to receive an image emitted by a display device through a corrective lens; a variable compensating element coupled to the conoscopic lens , wherein the variable compensating element is capable of selectively modifying the image emitted by the display device to compensate for an optical effect imparted by the corrective lens to the image; and a controller coupled to the variable compensating element, wherein the controller: receives a compensation parameter indicative of the optical effect imparted by the corrective lens to the image; selects a characteristic of the variable compensation element that compensates for the optical effect based at least in part on the compensation parameter; and Applying the feature of the variable compensation element to the image.

In another aspect is disclosed a system comprising: a display device including a corrective lens; and an imaging camera device optically coupled to the display device, wherein the imaging camera device includes: a conoscopic lens, It is configured to receive an image emitted by the display device through the corrective lens; a variable compensating element coupled to the conoscopic lens, wherein the variable compensating element is capable of selectively modifying an image emitted by the display device the image to compensate for an optical effect imparted by the corrective lens to the image; and a controller coupled to the variable compensation element, wherein the controller: receives a compensation parameter representing the corrective lens imparting the optical effect to the image; selecting a feature of the variable compensation element that compensates for the optical effect based at least in part on the compensation parameter; and applying the feature of the variable compensation element to the image.

In yet another aspect, a method is disclosed that includes: optically coupling a display device to a conoscope configured to receive an image emitted by the display device through a corrective lens; by a controller coupled to a variable compensation element positioned in an optical path of the conoscopic lens receives a compensation parameter indicative of at least one optical effect imparted by the corrective lens to the image; by the control selecting a feature of the variable compensating element that compensates for the optical effect based at least in part on the compensating parameter; and applying, by the controller, the feature of the variable compensating element to the image in the conoscope.

The present invention generally relates to apparatus, systems and methods for selectively compensating for corrective lenses applied to a display device during testing. As will be explained in more detail below, such devices, systems and methods can provide numerous features and benefits.

In some examples, a display of an augmented reality and/or virtual reality (AR/VR) device may emit collimated light toward a user's eyes. In some AR/VR devices, prescription lenses may be placed between the user's eyes and the AR/VR display to correct defects and/or refractive errors in the user's eyes. Unfortunately, such prescription lenses are typically not easily removable. Furthermore, such prescription lenses can present difficulties related to characterizing AR/VR display performance through metrics like modulation transfer function (MTF) and/or display color uniformity. The MTF of an AR/VR display can represent resolution properties and/or quantify the sharpness of the display at different spatial frequencies.

Characterizing display parameters such as MTF and/or color uniformity for AR/VR devices including prescription lenses will be extremely useful in some cases. However, a well-focused image may be required for accurate evaluation, and the presence of prescription lenses may distort the image emitted by the AR/VR device, thus making it difficult to obtain a well-focused image. For example, prescription lenses are often customized for a specific user and/or a specific group of users. Thus, this square lens can introduce variable modifications to the wavefront of light from the AR/VR display, making MTF determination and/or color uniformity measurement difficult.

Visual perception may account for over 80% of all information humans receive and/or consume from the real world. For this reason, the absolute priority of all modalities to create a realistic and/or believable AR/VR experience may involve creating artificial images of the human eye. Efforts to this end may necessitate the development and/or production of so-called near-eye displays (NEDs). The development and/or production of such NEDs can be a complex scientific and/or engineering effort that includes not only the development and/or production of the displays themselves, but also the creation of the characterization, testing and and/or all necessary infrastructure for metering.

In some cases, the characterization of the AR/VR display may be suitable for various quality and/or calibration purposes. Examples of applications for characterization and/or measurement devices include, but are not limited to, evaluation of display prototypes, quality control of display production lines, compliance checks on displays (e.g., in relation to safety regulations), and/or in Calibration and adjustment of the display before or during use, combinations or variations of one or more of the foregoing, and/or any other suitable application.

Contemporary AR/VR displays can push the boundaries of optical system design with the goal of increasing the user's field of view and/or eye frame, improving display efficiency, and/or reducing display size and/or weight. For better performance and/or efficiency, some metrics (eg, MTF and/or angular uniformity) may be sacrificed in favor of optimizing other parameters. Such trade-offs may be reasonable, since uniformity and/or other deficiencies are often detected and/or corrected during testing with proper calibration. While it can relieve some of the pressure on display developers, this approach can create additional challenges for optical metrology due to the large amounts of data that need to be collected, processed and/or stored to facilitate such testing and/or calibration. This approach can also result in extremely lengthy factory procedures requiring expensive automated machinery with custom features and/or devices.

Examples of testing and calibration methods that AR/VR displays undergo include display MTF and/or color uniformity calibration. One purpose of display MTF testing is to ensure that virtual images generated by a display meet required MTF specifications when viewed from a number of different angles. In some examples, this MTF test can interface and/or deploy complex systems with several cameras. In such instances, each camera may observe the virtual image from defined angles and/or perform necessary data collection. Using several cameras in this manner may allow and/or facilitate capturing information about all angles simultaneously. However, this approach can have several significant drawbacks, including higher cost (eg, equipment can necessitate as many as 30 expensive cameras), complex alignment and/or audit procedures, larger system size and/or footprint, relatively Heavy weight and/or considerable inconvenience.

In some cases, MTF measurements can be further complicated if the AR/VR device under test is adjusted for users with different vision. For example, an AR/VR device may include and/or incorporate prescription lenses for one or both eyes, and these prescription lenses may be non-removably fixed and/or attached to the AR/VR display. Therefore, removal of prescription lenses may not be feasible outside of professional services. These prescription lenses can modify the image projected by the AR/VR display, similar to how prescription glasses compensate for nearsightedness or farsightedness.

Additional challenges may exist with the requirement to determine MTF and/or measure color uniformity of AR/VR displays by prescribing lenses. Refractive error correction for hypermetropia in any given eye can include three main variants, namely sphere (Sph), cylinder (Cyl) and/or cylinder axis (Ax). Due to the varying values for these variants, there may be a large number of unique lens prescriptions (eg, 500,000 different options). In terms of optical power changes alone, a large number (eg, hundreds or more) of prescription lens powers may be required during display characterization (eg, for determining display parameters such as MTF).

In some cases, determining the MTF and/or color uniformity of AR/VR displays where a square lens provides astigmatism correction may prove to be particularly challenging. Such prescription lenses can add other variable modifications to the wavefront of the light emitted from the AR/VR display. One approach to address this challenge may involve sequentially focusing images along different astigmatism axes. Disadvantageously, this approach can lead to massive focus control, additional device under test and/or equipment adjustments, complex data processing and/or large measurement errors.

In some cases, it may be very useful to determine display MTF and/or color uniformity using a single camera and single image capture. Furthermore, in the absence of compensating elements, prescription lenses may introduce monocular aberrations on the outgoing light wavefront that dominate any MTF or color uniformity measurement. Therefore, compensation for such monocular aberrations may be required for accurate MTF and/or color uniformity determinations. Accordingly, the present invention identifies and addresses the need for additional and improved apparatus, systems, and methods for selectively compensating for square lenses applied to display devices during testing.

As will be described in more detail below, the device and/or system can be configured to compensate for many possible prescription lenses in order to convey a sharp image from the AR/VR display under test to the image sensor. Thereby, the device and/or system can facilitate and/or support accurate determination of the MTF and/or color uniformity of that AR/VR display. In some examples, the device and/or system can be configured to obtain the MTF and/or color uniformity of that AR/VR display. In such examples, MTF and/or color uniformity determinations may indicate and/or represent image clarity on AR/VR displays. These MTF and/or color uniformity determinations can be used to ensure that AR/VR displays meet and/or meet certain quality standards prior to release and/or shipment.

In some examples, such devices and/or systems can include a light collection element (eg, an optical element such as a lens of a conoscopic lens) configured to collect light from a display over a range of viewing angles. By collecting light from a range of viewing angles, such an apparatus and/or system can alleviate and/or eliminate the conventional requirement of multiple cameras deployed at multiple locations for testing and/or calibration. Thus, such an apparatus and/or system may require and/or include only a single camera, thereby facilitating reduced cost and greatly simplified alignment and/or operation during testing and/or calibration.

In some examples, such apparatus and/or systems may implement and/or include compensation elements (such as features of phase plate arrays) that help compensate for square lenses incorporated in AR/VR devices under test. In one example, the compensating element can be positioned, placed, and/or located in or near the pupil conjugate region of a conoscopic lens included in the apparatus and/or system. In this example, the compensating element may be selected from a plurality of such elements (eg, incorporated into a phase plate array) based at least in part on the properties and/or characteristics of the square lens applied to the AR/VR device. The compensating element compensates for and/or takes into account the effect of prescription lenses on image quality. Thus, such compensating elements may enable and/or succeed in optical configurations of devices and/or systems with a very simple design (eg, including certain fixed optical features).

In some examples, adjustment of prescription lenses for incorporation in AR/VR devices may involve automatic selection and/or application of compensating elements from an array of such elements configured on a phase plate array. In such examples, the light from the AR/VR display can be modified by the prescription lens, and the compensating element can reverse the effect of the prescription lens. In one example, such an apparatus and/or system may include and/or represent a bi-telecentric afocal optical repeater device, a potentially telecentric eyepiece lens, an image sensor, and/or a compensating plate (e.g., a phase plate array).

In some examples, such devices and/or systems may facilitate and/or support determination and/or calibration of MTF and/or color uniformity or sharpness of AR/VR displays fitted and/or equipped with prescription lenses . These prescription lenses may provide and/or impart spherical correction only, cylindrical correction only, or both spherical and cylindrical correction. In one example, such an apparatus and/or system may include and/or represent a conoscope and/or another optical device configured to collect light from an AR/VR display at viewing angles, thereby facilitating and/or Or support MTF and/or color uniformity judgment using a single camera. Additionally or alternatively, such devices and/or systems may include and/or represent specific beams and/or reflectors (e.g., cavity reflectors) configured to collect light from an AR/VR display at several viewing angles .

In some examples, the compensation element of such devices and/or systems may include and/or represent at least one Pancharatnam-Berry phase (PBP) optical element. In one example, the selection, adjustment, insertion, and/or application of such compensating elements can be automated and directed by a controller (eg, a processing device). Additionally or alternatively, such compensating elements may be selected based at least in part on one or more adjustment parameters and/or optical properties of a square lens applied to the AR/VR display under test.

Detailed descriptions of exemplary devices, systems, components, and corresponding implementations for selectively compensating for corrective lenses applied to a display device during testing are provided below with reference to FIGS. 1-5 . Additionally, a method for selectively compensating a corrective lens applied to a display device during testing is described in detail in conjunction with FIG. 6 . The discussion corresponding to FIGS. 7 and 8 will provide exemplary artificial reality devices, wearables, and/or associated devices that may be tested and/or calibrated using one of the devices, systems, and/or methods disclosed herein. A detailed description of the type of system.

FIG. 1 shows an exemplary apparatus 100 that facilitates and/or supports selectively compensating for corrective lenses applied to a display device during testing. As shown in FIG. 1 , an exemplary apparatus 100 may include and/or represent a conoscopic lens 102 , a variable compensating element 104 , and/or a controller 106 . In some examples, the conoscopic lens 102 may be configured to receive, detect, and/or accept images emitted by a display device through a corrective lens. In such examples, variable compensating element 104 may be physically, directly, indirectly, and/or optically coupled to conoscope 102 . In one example, the variable compensating element 104 may be capable of selectively modifying the image emitted by the display device to compensate for the optical effect imparted by the corrective lens on the image.

In some examples, controller 106 may be physically, directly, indirectly, and/or communicatively coupled to variable compensation element 104 . In one example, the controller 106 may receive and/or obtain a compensation parameter representing the optical effect imparted by the corrective lens to the image. Controller 106 may receive and/or obtain this compensation parameter in a number of different ways. For example, the controller 106 may receive and/or obtain compensation parameters as user input from a technician performing a test of the display device via the user interface. In another example, the display device may be programmed with information identifying certain properties of the corrective lens, and the controller 106 may be communicatively coupled (via, eg, a wireless and/or wired connection) to the display device. In this example, the controller 106 may receive and/or obtain information identifying those properties of the corrective lens from the display device via the communicative coupling.

In some examples, the compensation parameters may constitute and/or represent one or more characteristics and/or properties of the corrective lens through which the image is transmitted. Additionally or alternatively, the compensation parameter may constitute and/or represent one or more characteristics and/or properties of the optical effect imparted by the corrective lens to the image. Examples of compensation parameters include, but are not limited to, the spherical power of the corrective lens, the cylindrical power of the corrective lens, the cylindrical axis of the corrective lens, combinations or variations of one or more of the foregoing, and/or any other suitable compensation parameter.

In some examples, based at least in part on the compensation parameters, controller 106 may select features of variable compensation element 104 that compensate for and/or account for optical effects imparted by corrective lenses. In one example, variable compensation element 104 may include and/or represent a phase plate array having a plurality of selectable features. In this example, the controller 106 may identify one of the selectable features of the phase plate array as capable of canceling and/or inverting the optical effect imparted by the corrective lens on the image. For example, when applied to an image, selected features of the phase plate array can counteract and/or reverse the optical effects imparted to the image by the spherical power, cylindrical power, and/or cylindrical axis of the corrective lens. This cancellation and/or inversion of optical effects may correct and/or adjust images to properly test and/or calibrate display devices by apparatus 100 and/or corresponding image sensors.

In some examples, controller 106 may apply characteristics of variable compensating element 104 to the image. In one example, after selecting features of the variable compensating element 104, the controller 106 may manipulate and/or adjust the variable compensating element 104 such that the selected features are applied to the image before the image reaches the image sensor. The controller 106 can manipulate and/or adjust the variable compensating element 104 in a number of different ways. For example, apparatus 100 may include and/or represent a phase plate positioning mechanism (not necessarily shown in FIG. Move in multiple directions (eg, rotationally, laterally, horizontally, vertically, diagonally, etc.). In this example, the controller 106 may direct and/or instruct the phase plate positioning mechanism to move the variable compensating element 104 to a position and/or orientation that causes selected features to appear in the image through the conoscopic lens 102. when applied to images.

In some examples, conoscopic 102 may include and/or represent any type or form of device and/or component that performs, facilitates, and/or supports conoscopic measurements and/or observations. In one example, conoscope 102 may include and/or represent one or more optical components. Examples of such optical components include, but are not limited to, lenses, quarter wave plates, reflectors, polarizers, retarders, partial reflectors, reflective polarizers, optical films, compensators, beam splitters, alignment layers, Color filter, protective sheet, glass component, plastic component, aperture, Fresnel lens, convex lens, concave lens, filter, spherical lens, cylindrical lens, compensator, coating, one or more of the above Combinations or variations of these, and/or any other suitable optical components. In one example, the conoscopic lens 102 may include and/or represent a stack of telecentric lenses capable of performing one or more optical functions including image scaling, lens correction, polarization, reflection, retardation, refraction, Light collection, optical aberration correction, gamma correction and/or adjustment, multiple image mixing and/or overlay, display overdrive compensation, chromatic aberration (Mura) correction, dithering, image decompression, noise correction, image distortion, contrast and/or sharpening, among other features.

In some examples, the optical components of conoscope 102 may include and/or contain a variety of different materials. Examples of such materials include, but are not limited to, plastic, glass (eg, crown glass), polycarbonate, combinations or variations of one or more of the foregoing, and/or any other suitable material. Optical components can be defined and/or formed in a variety of shapes and/or sizes.

In some examples, variable compensation element 104 may include and/or represent any type or form of phase plate array and/or phase compensation plate. In such examples, the phase plate array and/or the phase compensation plate may include and/or represent a plurality of selectable features such as phase compensation elements. In one example, selectable features can include and/or represent a set of PBP optics and/or aligners. Additionally or alternatively, at least a portion of the variable compensating element 104 may be sized and/or dimensioned to fit within an optical tray positioned in the optical path of the image within the conoscope 102 .

In some examples, variable compensating element 104 may include and/or represent one or more spherical power features and/or adapters capable of canceling and/or inverting the spherical power of a corrective lens applied to a display device under test or effect. In other examples, the variable compensating element 104 may include and/or represent one or more cylindrical power features and/or adapters capable of canceling and/or reversing the cylindrical power of the corrective lens applied to the display device under test. facet degree or effect. Additionally or alternatively, variable compensating element 104 may include and/or represent one or more cylindrical axis features and/or adapters capable of counteracting and/or reversing the cylindrical shape of the corrective lens applied to the display device under test. Face axis. Finally, the variable compensating element 104 may include and/or represent one or more field curvature features and/or adapters capable of canceling and/or inverting the field curvature and/or curvature of the corrective lens applied to the display device under test. / or magnification effects.

In some examples, controller 106 may include and/or represent any type or form of hardware-implemented processing device and/or system capable of interpreting and/or executing computer-readable instructions. In one example, controller 106 may access and/or modify certain software modules stored in memory to facilitate and/or support selective compensation of corrective lenses applied to the display device during testing. Examples of the controller 106 include, but are not limited to, physical processors, central processing units (Central Processing Unit; CPU), microprocessors, microcontrollers, Field-Programmable Gate Arrays (Field-Programmable Gate Arrays) implementing soft-core processors ; FPGA), Application-Specific Integrated Circuit (ASIC), part of one or more of the foregoing, variations or combinations of one or more of the foregoing, and/or any other suitable controller.

In some examples, apparatus 100 may include and/or represent one or more additional components, devices, and/or mechanisms not necessarily shown and/or labeled in FIGS. 1-5 . For example, the conoscopic lens 102 may include and/or represent one or more lenses not necessarily shown and/or labeled in FIGS. 1-5 . In another example, although not necessarily shown and/or labeled in this manner in FIGS. Wires, connectors, springs, motors and/or actuators, and other components. In other examples, apparatus 100 may exclude and/or omit one or more of the components, devices, and/or mechanisms shown and/or labeled in FIGS. 1-5 .

FIG. 2 shows an exemplary implementation of a conoscopic lens 102 that facilitates and/or supports selectively compensating for corrective lenses applied to a display device during testing. As shown in FIG. 2 , an exemplary conoscope 102 may include and/or represent a front lens 202 , a back lens 204 , an aperture stop 206 , and/or a circular polarizer 210 . In one example, front lens 202 may include and/or represent a light collection and/or imaging lens configured to collect collimated light representing an image emitted by a display device. In this example, when the collimated light emitted by the display device is within the viewing angle range, the front lens 202 can collect the collimated light. Additionally or alternatively, rear lens 204 may include and/or represent an image forming lens configured to form an image from collimated light for presentation on an image sensor.

In some embodiments, front lens 202 and back lens 204 can be similar and/or identical to each other. In such embodiments, front lens 202 and back lens 204 may be positioned and/or configured in an azimuthal manner relative to each other within conoscope 102 .

In some examples, front lens 202 may be positioned and/or placed proximate and/or proximate to the display device under test. In such examples, aperture stop 206 may be positioned and/or placed proximate and/or proximate to the image sensor. In one example, circular polarizer 210 and/or back lens 204 may be positioned and/or placed proximate to each other between front lens 202 and aperture stop 206 . More specifically, circular polarizer 210 may be positioned and/or placed between front lens 202 and back lens 204 . Additionally or alternatively, back end lens 204 may be positioned and/or placed between circular polarizer 210 and aperture stop 206 . Thus, light emitted by the display device may enter the conoscope 102 at and/or through the front lens 202 and then traverse towards the circular polarizer 210 . After passing through the circular polarizer 210 , the light may traverse towards the rear lens 204 before exiting the conoscope 102 through the aperture stop 206 .

3 shows an exemplary implementation of an apparatus 100 that facilitates and/or supports selectively compensating for corrective lenses applied to a display device during testing. As shown in FIG. 3 , an exemplary implementation of apparatus 100 may include and/or represent a conoscopic lens 102 , a variable compensating element 104 , and/or a controller 106 . In some examples, apparatus 100 may include and/or represent a phase plate positioning mechanism 304 communicatively coupled to controller 106 . Additionally or alternatively, the phase plate positioning mechanism 304 may be physically and/or communicatively coupled to the variable compensation element 104 . In such examples, the phase plate positioning mechanism 304 can be configured such that the variable compensating element 104 is relative to the conoscopic lens 102 in one or more directions (e.g., rotationally, laterally, horizontally, vertically). , diagonally, etc.) to move. In one example, phase plate positioning mechanism 304 may move variable compensating element 104 into a position that causes a feature selected by controller 106 to be applied to the image as it passes through conoscope 102 .

In some examples, phase plate positioning mechanism 304 may include and/or represent one or more devices and/or components that apply force to variable compensating element 104 . Forces applied by such devices and/or components may cause and/or guide variable compensating element 104 to move into a certain position relative to the optical path of conoscopic lens 102 . Examples of such devices and/or components include, but are not limited to, actuators, rotators, servo motors, Direct Current (DC) motors, Alternating Current (AC) motors, one or more of the foregoing Variations or combinations, and/or any other suitable devices and/or components.

In some examples, phase plate positioning mechanism 304 may align selected features of variable compensating element 104 with the optical path of conoscopic mirror 102 by moving variable compensating element 104 into that position. For example, the phase plate positioning mechanism 304 can engage one or more actuators to move the variable compensating element 104 relative to and/or within the optical tray of the conoscopic mirror 102 such that the The optical path of light mirror 102 applies selected features to the image.

4 shows an exemplary system 400 that facilitates and/or supports selectively compensating for a corrective lens 404 applied to a display device 402 during testing. As shown in FIG. 4 , an exemplary system 400 may include and/or represent a display device 402 and/or an imaging camera device 410 . In some examples, imaging camera device 410 may be optically coupled to display device 402 . In one example, imaging camera device 410 may include and/or represent conoscopic lens 102 , variable compensating element 104 , and/or controller 106 . In this example, imaging camera device 410 may include and/or represent image sensor 408 physically, directly, indirectly, and/or optically coupled to variable compensation element 104 .

In some examples, display device 402 may include and/or represent a light source 412 that emits, projects, and/or transmits image 406 as collimated light through corrective lens 404 . In such examples, corrective lenses 404 may compensate for and/or account for those visual deficiencies and/or deficiencies of the user (much like prescription eyeglasses). Due to corrective lens 404, image 406 may be subject to one or more optical effects that alter and/or distort the collimated light in one way or another relative to its original form.

In some examples, corrective lens 404 may modify, alter, and/or alter image 406 to compensate for refractive errors experienced by those users. Examples of such refractive errors include, but are not limited to, nearsightedness, hyperopia, astigmatism, presbyopia, combinations or variations of one or more of the foregoing, and/or any other visual defect and/or deficiency. In order to accurately test and/or calibrate the quality of image 406 after passing through corrective lens 404 , image 406 may undergo further modification by various adapters included in imaging camera device 410 before reaching image sensor 408 . In some embodiments, corrective lens 404 may include and/or represent any type or form of prescription lens and/or transmittable optical device prescribed by a physician and/or medical practitioner, such as an ophthalmologist and/or optometrist .

In one example, image 406 may pass, traverse, and/or travel along optical path 416 through, through, and/or through various components of conoscope 102 (including, for example, front lens 202 ) before reaching image sensor 408 for evaluation and/or analysis. , circular polarizer 210 and/or rear lens 204, etc.). In this example, image 406 may also pass, traverse, and/or travel through selected features of variable compensation element 104 before reaching image sensor 408 for evaluation and/or analysis. As such, image 406 may undergo and/or undergo transformations and/or alterations that return collimated light to its original form (eg, prior to the optical effect imparted by corrective lens 404). In other words, selected features of variable compensating element 104 may condition and/or process collimated light such that image 406 reaches image sensor 408 before correcting lens 404 . In some examples, image sensor 408 may detect, sense, analyze, and/or evaluate image 406 to obtain information regarding and/or insight into the quality of image 406 projected and/or presented by display device 402 .

In some examples, conoscope 102 may include and/or represent a position and/or position optical tray 414 positioned and/or positioned in and/or along optical path 416 traversed by image 406 set up. In one example, variable compensating element 104 may be inserted and/or mounted into optical tray 414 . In this example, optical tray 414 may constitute, represent and/or form an interface and/or socket between variable compensating element 104 and/or conoscopic mirror 102 . Additionally or alternatively, phase plate positioning mechanism 304 may engage one or more actuators to move variable compensating element 104 relative to optical tray 414 . As a result of such movement, phase plate positioning mechanism 304 may effectively apply and/or align selectable features of variable compensating element 104 to image 406 as image 406 traverses optical path 416 within conoscope 102 .

In some examples, image sensor 408 may be communicatively coupled to controller 106 and/or may provide data representing image 406 to controller 106 for further evaluation and/or analysis. In one example, controller 106 may receive data representing image 406 from image sensor 408 . In this example, controller 106 may determine, extrapolate, and/or identify one or more display parameters of display device 402 based at least in part on data representing image 406 . Examples of such display parameters include, but are not limited to: MTF of the display device 402, color uniformity measurements of the display device 402, resolution (e.g., angular resolution) of the display device 402, sharpness measurements of the display device 402, Brightness uniformity measurements of the display device 402, combinations or variations of one or more of the above, and/or any other suitable display parameters.

In some examples, controller 106 may use such display parameters to determine whether display device 402 complies with and/or satisfies certain quality standards. Additionally or alternatively, controller 106 may provide such display parameters to a computing device and/or a user interface (e.g., a monitor), while technicians responsible for ensuring certain quality standards for display device 402 operate and/or Or the computing device and/or user interface (eg, monitor) may be accessed. In one example, controller 106 may devise a strategy for remediating one or more deficiencies detected in display device 402 based at least in part on display parameters. Additionally, controller 106 may initiate and/or perform one or more actions directed to correct one or more deficiencies detected in display device 402 . For example, controller 106 may notify and/or inform a technician how to correct and/or resolve one or more deficiencies detected in display device 402 .

FIG. 5 shows an exemplary implementation of the variable compensation element 104 . In some examples, the exemplary implementation of variable compensating element 104 in FIG. 5 may include and/or represent a phase plate array with a set of PBP optical elements and/or correctors. As shown in FIG. 5, such an implementation of variable compensating element 104 may include and/or represent features 502(1), 502(2), 502(3), 502(4), 502(5), 502( 6), 502(7), 502(8), 502(9), 502(10), 502(11), 502(12), 502(13), 502(14), 502(15), 502( 16), 502(17), 502(18), 502(19), 502(20), 502(21), 502(22), 502(23), 502(24), 502(25), 502( 26), 502(27), 502(28), 502(29), 502(30), 502(31) and/or 502(32). In one example, each of features 502(1)-502(32) can include and/or represent a different and/or unique PBP optical element. In this example, features 502(1)-502(32) may include and/or represent combinations of different spherical powers and/or cylindrical powers.

In some examples, controller 106 may select one of features 502 ( 1 )- 502 ( 32 ) from variable compensating element 104 to supply for image 406 . As a particular example, feature 502(1) may include and/or represent a combination of 0 diopters for SPH and 0 diopters for CYL. In this example, feature 502(16) may include and/or represent a combination of -4 diopters for SPH and -0.5 diopters for CYL. Additionally or alternatively, feature 502(32) may include and/or represent a combination of -4 diopters for SPH and -1.5 diopters for CYL.

6 is a flowchart of an exemplary method 500 for fabricating and/or assembling an imaging camera device that facilitates selectively compensating for corrective lenses applied to a display device during testing. Additionally or alternatively, the steps shown in FIG. 6 may combine and/or involve various sub-steps and/or variations consistent with the descriptions provided above in connection with FIGS. 1-5 .

As shown in FIG. 6, method 600 may include and/or involve the step (610) of optically coupling a display device to a conoscopic lens configured to receive an image emitted by the display device through a corrective lens. . Step 610 can be performed in a variety of ways, including any of those described above in connection with FIGS. 1-5 . For example, a test equipment manufacturer and/or contractor may optically couple a display device to a conoscope configured to receive an image emitted by the display device through a corrective lens.

Method 600 may also include and/or involve the step of receiving compensation parameters indicative of the optical effect imparted by the corrective lens on the image (620). Step 620 may be performed in a variety of ways, including any of those described above in connection with FIGS. 1-5 . For example, the controller may be coupled to a variable compensating element positioned in the optical path of the conoscopic lens. In this example, the controller may receive compensation parameters representing the optical effect imparted by the corrective lens on the image.

Method 600 may also include and/or involve a step ( 630 ) of selecting characteristics of a variable compensation element that compensates for optical effects based at least in part on compensation parameters. Step 630 can be performed in a variety of ways, including any of those described above in connection with FIGS. 1-5 . For example, the controller may select characteristics of a variable compensation element that compensates for optical effects based at least in part on compensation parameters.

Method 600 may also include and/or involve the step (640) of applying the characteristics of the variable compensating element to the image in the conoscopic lens. Step 640 may be performed in a variety of ways, including any of those described above in connection with FIGS. 1-5 . For example, the controller can apply the characteristics of the variable compensating element to the image in the conoscopic lens.

Illustrative concrete examples

Embodiment 1: An apparatus comprising: (1) a conoscopic lens configured to receive an image emitted by a display device through a corrective lens; (2) a variable compensating element coupled to the conoscopic lens an optical mirror, wherein the variable compensating element is capable of selectively modifying the image emitted by the display device to compensate for an optical effect imparted to the image by the correcting lens; and (3) a controller coupled to the A variable compensation element, wherein the controller: (1) receives a compensation parameter indicative of the optical effect imparted by the corrective lens to the image; (2) selects the variable compensation parameter to compensate for the optical effect based at least in part on the compensation parameter. changing a characteristic of the variable compensation element; and (3) applying the characteristic of the variable compensation element to the image.

Embodiment 2: The apparatus of Embodiment 1, further comprising an image sensor coupled to the variable compensation element, wherein: (1) after the image is compensated by the characteristic of the variable compensation element , the image sensor is configured to sense the image; and (2) the controller: (A) receives from the image sensor a representation of the image when the image is sensed by the image sensor and (B) determining a display parameter of the display device based at least in part on the data representing the image.

Embodiment 3: The device according to Embodiment 1 or 2, wherein the display parameters include at least one of the following: (1) a modulation transfer function of the display device; (2) a color uniformity of the display device (3) a resolution of the display device; (4) a definition measurement of the display device; or (5) a brightness uniformity measurement of the display device.

Embodiment 4: The apparatus of any of Embodiments 1 to 3, wherein: (1) the variable compensating element comprises a phase plate array comprising a plurality of selectable features; and (2) the control A sensor selects one of the selectable features included on the phase plate array for application to the image before the image reaches the image sensor.

Embodiment 5: The apparatus of any of Embodiments 1 to 4, wherein the optional features included on the phase plate array comprise at least one of a set of interrogated Ratnam-Berry phase optical elements .

Embodiment 6: The apparatus of any of Embodiments 1 to 5, further comprising a phase plate positioning mechanism communicatively coupled to the controller and configured to move the phase plate array, wherein The controller directs the phase plate positioning mechanism to move the phase plate array to a position such that the one of the selectable features is applied to the image as it passes through the conoscope.

Embodiment 7: The apparatus of any one of Embodiments 1 to 6, wherein: (1) the phase plate positioning mechanism comprises one or more actuators; (2) the conoscope comprises a an optical tray in the optical path; and (3) the phase plate positioning mechanism engages the actuators to move the phase plate array relative to the optical tray such that the one of the selectable features is The optical path within the conoscope is applied to the image.

Embodiment 8: The apparatus of any one of Embodiments 1 to 7, wherein the controller provides the display parameter representing the display device to a user interface or a computing device for evaluation.

Embodiment 9: The apparatus of any one of Embodiments 1 to 8, wherein the compensation parameter includes at least one of the following: (1) a spherical power of the corrective lens; (2) one of the corrective lenses Cylindrical power; or (3) A cylindrical axis of the corrective lens.

Embodiment 10: The apparatus of any one of Embodiments 1 to 9, wherein the conoscope comprises: (1) a light collection lens configured to collect light representing the an image; and (2) an image forming lens configured to form the image from the light for presentation on the image sensor.

Embodiment 11: The apparatus of embodiments 1 to 10, wherein the light collection lens collects the light when the light is emitted by the display device within a viewing angle range.

Embodiment 12: A system comprising: (1) a display device; and (2) an imaging camera device optically coupled to the display device, wherein the imaging camera device comprises: (A) a conoscopic lens , configured to receive an image emitted by a display device via a corrective lens; (B) a variable compensating element coupled to the conoscopic lens, wherein the variable compensating element is capable of selectively modifying the The image emitted by the display device to compensate for an optical effect imparted by the corrective lens to the image; and (C) a controller coupled to the variable compensation element, wherein the controller: (I) receives a a compensation parameter indicative of the optical effect imparted by the corrective lens to the image; (II) selecting a feature of the variable compensation element that compensates for the optical effect based at least in part on the compensation parameter; and (III) using The feature of the variable compensation element is applied to the image.

Embodiment 13: The system of Embodiment 12, wherein: (1) the imaging camera device includes an image sensor coupled to the variable compensation element; (2) the image passes through the variable compensation element After the characteristic is compensated, the image sensor is configured to sense the image: and (3) the controller: (I) when the image is sensed by the image sensor, receiving data representing the image; and (II) determining a display parameter representing the display device based at least in part on the data representing the image.

Embodiment 14: The system according to Embodiment 12 or 13, wherein the display parameters include at least one of the following: (1) a modulation transfer function of the display device; (2) a color uniformity of the display device (3) a resolution of the display device; (4) a definition measurement of the display device; or (5) a brightness uniformity measurement of the display device.

Embodiment 15: The system of any of Embodiments 12 to 14, wherein: (1) the variable compensating element comprises a phase plate array including a plurality of selectable features; and (2) the control A sensor selects one of the selectable features included on the phase plate array for application to the image before the image reaches the image sensor.

Embodiment 16: The system of any of Embodiments 12 to 15, wherein the selectable features included on the phase plate array comprise at least one of a set of interlocking Ratnam-Berry phase optical elements .

Embodiment 17: The system of any of Embodiments 12 to 16, further comprising a phase plate positioning mechanism communicatively coupled to the controller and configured to move the phase plate array, wherein The controller directs the phase plate positioning mechanism to move the phase plate array to a position such that the one of the selectable features is applied to the image as it passes through the conoscope.

Embodiment 18: The system of any one of Embodiments 12 to 17, wherein: (1) the phase plate positioning mechanism comprises one or more actuators; (2) the conoscope comprises a an optical tray in the optical path; and (3) the phase plate positioning mechanism engages the actuators to move the phase plate array relative to the optical tray such that the one of the selectable features is The optical path within the conoscope is applied to the image.

Embodiment 19: The system of any of Embodiments 12 to 18, wherein the controller provides the display parameter representing the display device to a user interface or a computing device for evaluation.

Embodiment 20: A method comprising: (1) optically coupling a display device to a conoscope configured to receive an image emitted by a display device through a corrective lens;( 2) receiving a compensation parameter indicative of the optical effect imparted by the corrective lens to the image by a controller coupled to a variable compensation element positioned in an optical path of the conoscopic lens; (3) by selecting, by the controller, a feature of the variable compensating element that compensates for the optical effect based at least in part on the compensation parameter; and (4) applying, by the controller, the feature of the variable compensating element to the conoscopic the image in the mirror.

Embodiments of the present invention may include or be implemented in combination with various types of artificial reality systems. Artificial reality is a form of reality that has been conditioned in some way before being presented to a user, which may include, for example, virtual reality, augmented reality, mixed reality, hybrid reality, or some combination and/or derivative thereof things. Artificial reality content may include fully computer-generated content or computer-generated content combined with captured (eg, real-world) content. Artificial reality content may include video, audio, haptic feedback, or some combination thereof, any of which may be presented in a single channel or in multiple channels (such as stereoscopic video that creates a three-dimensional (3D) effect on the viewer ). Additionally, in some embodiments, an artificial reality may also be used in conjunction with, for example, applications, products, products, attachments, services, or some combination thereof.

The artificial reality system can be implemented in various form factors and configurations. Some artificial reality systems may be designed to function without a near-eye display (NED). Other artificial reality systems may include NEDs that also provide visibility into the real world (such as, for example, augmented reality system 700 in FIG. 7 ), or visually immerse the user in an artificial reality (such as, for example, FIG. 8 In the virtual reality system 800). While some artificial reality devices may be self-contained systems, other artificial reality devices may communicate and/or coordinate with external devices to provide an artificial reality experience to a user. Examples of such external devices include handheld controllers, mobile devices, desktop computers, devices worn by a user, devices worn by one or more other users, and/or any other suitable external system.

Turning to FIG. 7 , augmented reality system 700 can include eyewear 702 having frame 710 configured to hold left display device 715 (A) and right display device 715 (B) in the user's eyes ahead. Display devices 715(A) and 715(B) may function together or independently to present an image or series of images to a user. Although augmented reality system 700 includes two displays, embodiments of the invention may be implemented in augmented reality systems with a single NED or more than two NEDs.

In some embodiments, augmented reality system 700 may include one or more sensors, such as sensor 740 . Sensor 740 may generate measurement signals in response to motion of augmented reality system 700 and may be located on substantially any portion of frame 710 . Sensor 740 may represent one or more of a variety of different sensing mechanisms, such as position sensors, inertial measurement units (IMUs), depth camera assemblies, structured light emitters and/or detectors, or any combination thereof. In some embodiments, augmented reality system 700 may or may not include sensor 740 or may include more than one sensor. In embodiments where sensor 740 includes an IMU, the IMU can generate calibration data based on measurement signals from sensor 740 . Examples of sensors 740 may include, but are not limited to, accelerometers, gyroscopes, magnetometers, other suitable types of sensors to detect motion, sensors for error correction of IMUs, or some combination thereof.

In some examples, augmented reality system 700 may also include a microphone array having a plurality of acoustic transducers 720 (A)- 720 (J), collectively referred to as acoustic transducers 720 . Acoustic transducer 720 may represent a transducer that detects changes in air pressure induced by sound waves. Each acoustic transducer 720 may be configured to detect sound and convert the detected sound to an electronic format (eg, analog or digital format). The microphone array in FIG. 7 may include, for example, ten acoustic transducers: 720(A) and 720(B), which may be designed to be placed inside corresponding ears of the user; acoustic transducer 720(C), 720(D), 720(E), 720(F), 720(G), and 720(H), which may be positioned at various locations on frame 710; and/or acoustic transducers 720(1) and 720 (J), which can be positioned on the corresponding neck strap 705 .

In some embodiments, one or more of acoustic transducers 720(A)-720(J) may serve as output transducers (eg, speakers). For example, acoustic transducers 720(A) and/or 720(B) may be earbuds or any other suitable type of headphones or speakers.

The configuration of the acoustic transducer 720 of the microphone array may vary. Although the augmented reality system 700 is shown in FIG. 7 as having ten acoustic transducers 720 , the number of acoustic transducers 720 may be greater or less than ten. In some embodiments, using a higher number of acoustic transducers 720 can increase the amount of collected audio information and/or improve the sensitivity and accuracy of the audio information. In contrast, using a lower number of acoustic transducers 720 may reduce the computational power required by the associated controller 750 to process the collected audio information. Additionally, the position of each acoustic transducer 720 of the microphone array may vary. For example, the positions of the acoustic transducers 720 may include defined positions with respect to the user, defined coordinates with respect to the frame 710, an orientation associated with each acoustic transducer 720, or some combination thereof.

Acoustic transducers 720(A) and 720(B) may be positioned on different parts of the user's ear, such as behind the pinna, behind the tragus, and/or within the concha or ear socket. Alternatively, there may be additional acoustic transducers 720 on or around the ear in addition to the acoustic transducers 720 inside the ear canal. Positioning the acoustic transducer 720 in close proximity to the user's ear canal enables the microphone array to gather information about how sound reaches the ear canal. By positioning at least two of the acoustic transducers 720 on either side of the user's head (e.g., as binaural microphones), the augmented reality system 700 can simulate binaural hearing and capture the surrounding area of the user's head. 3D stereo sound field. In some embodiments, acoustic transducers 720(A) and 720(B) can be connected to augmented reality system 700 via wired connection 730, and in other embodiments, acoustic transducers 720(A) and 720 (B) Can be connected to the augmented reality system 700 via a wireless connection (eg, Bluetooth connection). In yet other embodiments, acoustic transducers 720(A) and 720(B) may not be used in conjunction with augmented reality system 700 at all.

Acoustic transducers 720 on frame 710 may be positioned in a number of different ways, including along the length of the temples, across bridges, above or below display devices 715(A) and 715(B), or some combination thereof. Acoustic transducer 720 may also be oriented such that the microphone array is capable of detecting sound in a wide range of directions surrounding the user wearing augmented reality system 700 . In some embodiments, an optimization process may be performed during manufacture of the augmented reality system 700 to determine the relative positioning of each acoustic transducer 720 in the microphone array.

In some examples, augmented reality system 700 may include or be connected to an external device (eg, a paired device), such as neckband 705 . Neckband 705 generally represents any type or form of paired device. Accordingly, the following discussion of the neckband 705 is also applicable to various other paired devices, such as charging cases, smart watches, smartphones, wristbands, other wearable devices, handheld controllers, tablets, laptops , other external computing devices, etc.

As shown, the neck strap 705 can be coupled to the eyewear 702 via one or more connectors. Connectors may be wired or wireless, and may include electrical and/or non-electrical (eg, structural) components. In some cases, eyewear 702 and neckband 705 may operate independently without any wired or wireless connection therebetween. Although FIG. 7 shows the components of the eyewear 702 and neckband 705 in an example location on the eyewear 702 and neckband 705, these components may be located elsewhere and/or distributed over the eyewear 702 and neckband 705 in a different manner. The upper wear 702 and/or the neckband 705. In some embodiments, the components of eyewear 702 and neckband 705 may be located on one or more additional peripheral devices paired with eyewear 702, neckband 705, or some combination thereof.

Pairing an external device such as the neckband 705 with the augmented reality eye wearable may enable the eye wearable to achieve the form factor of a pair of glasses while still providing sufficient battery power and computing power for expansion capabilities. Some or all of the battery power, computing resources, and/or additional features of the augmented reality system 700 may be provided by the paired device or shared between the paired device and the eyewear, thereby reducing the weight of the eyewear overall , heat distribution, and form factor while still maintaining desired functionality. For example, the neck strap 705 can allow components that would otherwise be included on the eyewear to be included in the neck strap 705 because the user can bear more on their shoulders than they would on their head. heavy weight load. The neckband 705 may also have a larger surface area on which to spread and dissipate heat to the surrounding environment. Thus, the neckband 705 may allow for greater battery capacity and computing power than is possible on a standalone eyewear. Since the weight carried in the neck strap 705 may be less intrusive to the user than the weight carried in the eyewear 702, the user can afford to wear lighter eyewear and bear the burden of carrying it. Carrying or wearing the paired device for a longer period of time than a user would endure wearing a heavier standalone eyewear, thereby enabling the user to more fully incorporate the artificial reality environment into their daily activities.

Neck strap 705 may be communicatively coupled to eyewear 702 and/or other devices. These other devices may provide certain functionality to the augmented reality system 700 (eg, tracking, positioning, depth mapping, processing, storage, etc.). In the particular example of FIG. 7, neckband 705 may include two acoustic transducers (e.g., 720(I) and 720(J)) that are part of a microphone array (or may form its own microphone sub-array) . The neckband 705 may also include a controller 725 and a power supply 735 .

Acoustic transducers 720(I) and 720(J) of neckband 705 may be configured to detect sound and convert the detected sound to an electronic format (analog or digital). In the specific example of FIG. 7, acoustic transducers 720(I) and 720(J) may be positioned on neckband 705, thereby increasing the relationship between neckband acoustic transducers 720(I) and 720(J) and positioning on the neckband 705. The distance between other acoustic transducers 720 on the eyewear 702 . In some cases, increasing the distance between the acoustic transducers 720 of the microphone arrays can improve the accuracy of beamforming performed by the microphone arrays. For example, if sound is detected by acoustic transducers 720(C) and 720(D), and the distance between acoustic transducers 720(C) and 720(D) is greater than, for example, acoustic transducer 720 (D) and 720(E), the determined source location of the detected sound can be more accurate than if the sound had been detected by acoustic transducers 720(D) and 720(E).

Controller 725 of neckband 705 may process information generated by sensors on neckband 705 and/or augmented reality system 700 . For example, controller 725 may process information from a microphone array describing sounds detected by the microphone array. For each detected sound, the controller 725 may perform a direction-of-arrival (DOA) estimation to estimate the direction from which the detected sound arrives at the microphone array. When sound is detected by the microphone array, the controller 725 may populate the audio dataset with this information. In embodiments where augmented reality system 700 includes an inertial measurement unit, controller 725 may compute all inertial and spatial operations from an IMU located on eye wearable 702 . The connectors can communicate information between the augmented reality system 700 and the neckband 705 , and between the augmented reality system 700 and the controller 725 . This information may be in the form of optical data, electrical data, wireless data or any other form of transmittable data. Moving the processing of information generated by the augmented reality system 700 to the neckband 705 reduces weight and heat in the eyewear 702, making the eyewear more comfortable for the user.

A power supply 735 in the neckband 705 can provide power to the eyewear 702 and/or the neckband 705 . Power source 735 may include, but is not limited to, lithium ion batteries, lithium polymer batteries, primary lithium batteries, alkaline batteries, or any other form of power storage. In some cases, power source 735 may be a wired power source. Including the power supply 735 on the neck strap 705 rather than the eyewear 702 can help to better distribute the weight and heat generated by the power supply 735 .

As mentioned, instead of blending artificial reality with actual reality, some artificial reality systems may essentially replace one or more of the user's sensory perception of the real world with a virtual experience. An example of this type of system is a head-mounted display system, such as virtual reality system 800 in FIG. 8 , which primarily or completely covers the user's field of view. The virtual reality system 800 may include a front rigid body 802 and a belt 804 shaped to fit around a user's head. Virtual reality system 800 may also include output audio transducers 806(A) and 806(B). Additionally, although not shown in FIG. 8 , front rigid body 802 may include one or more electronic components including one or more electronic displays, one or more inertial measurement units (IMUs), one or more tracking transmitters sensor or detector and/or any other suitable device or system for generating an artificial reality experience.

An artificial reality system may include various types of visual feedback mechanisms. For example, the display devices in the augmented reality system 700 and/or the virtual reality system 800 may include one or more liquid crystal displays (liquid crystal display; LCD), light emitting diodes (light emitting diode; LED) displays , micro LED displays, organic LED (organic LED; OLED) displays, digital light projection (digital light project; DLP) microdisplays, liquid crystal on silicon (LCoS) microdisplays, and/or any other suitable type of Display the screen. These artificial reality systems may include a single display screen for both eyes, or may provide a display screen for each eye, which may allow additional flexibility for zoom adjustment or for correcting the user's refractive error . Some of these artificial reality systems may also include an optical subsystem with one or more lenses (e.g., concave or convex lenses, Fresnel lenses, adjustable liquid lenses, etc.) through which the user views the display screen. These optical subsystems can be used for a variety of purposes, including collimating light (e.g. making objects appear at a greater distance than they actually are), amplifying light (e.g. making objects appear larger than they really are) and/or Or relay light (relay light to, for example, the viewer's eye). These optical subsystems can be used in non-pupil-forming architectures (such as single lens configurations that directly collimate light but produce so-called pincushion distortion) and/or pupil-forming architectures (such as producing so-called barrel distortion to eliminate the pincushion distortion). Shape distortion of the multi-lens configuration).

Some of the artificial reality systems described herein may also include one or more projection systems in addition to or instead of using a display screen. For example, display devices in augmented reality system 700 and/or virtual reality system 800 may include micro LED projectors that project light (using, for example, waveguides) into display devices such as those that allow ambient Clear combiner lens through which light passes. The display device can refract the projected light toward the user's pupil, and can enable the user to simultaneously view both the artificial reality content and the real world. Display devices can accomplish this using any of a variety of different optical components, including waveguide components (e.g., holographic, planar, diffractive, polarizing, and/or reflective waveguide elements), light manipulating surfaces, and elements (such as diffractive, reflective and refractive elements and gratings), coupling elements, etc. The artificial reality system may also be configured with any other suitable type or form of image projection system, such as a retinal projector used in a virtual retinal display.

The artificial reality systems described herein may also include various types of computer vision components and subsystems. For example, augmented reality system 700 and/or virtual reality system 800 may include one or more optical sensors, such as two-dimensional (2D) or 3D cameras, structured light transmitters, and detectors. sensors, time-of-flight depth sensors, single-beam or swept laser rangefinders, 3D LiDAR sensors, and/or any other suitable type or form of optical sensors. An artificial reality system may process data from one or more of these sensors to identify a user's location, map the real world, provide the user with context about the real world environment, and/or perform a variety of other functions.

The artificial reality systems described herein may also include one or more input and/or output audio transducers. Output audio transducers may include voice coil speakers, ribbon speakers, electrostatic speakers, piezoelectric speakers, bone conduction transducers, cartilage conduction transducers, tragus vibration transducers, and/or any other suitable type or form of Audio transducer. Similarly, input audio transducers may include condenser microphones, dynamic microphones, ribbon microphones, and/or any other type or form of input transducers. In some embodiments, a single transducer can be used for both audio input and audio output.

In some embodiments, the artificial reality systems described herein can also include haptic (i.e., sense of touch) feedback systems that can be incorporated into headgear, gloves, one-piece suits, handheld controllers , environmental devices (eg, seats, floor mats, etc.) and/or any other type of device or system. Haptic feedback systems can provide various types of skin feedback, including vibration, force, traction, texture and/or temperature. Haptic feedback systems can also provide various types of kinesthetic feedback, such as motion and compliance. Haptic feedback may be implemented using motors, piezoelectric actuators, fluid systems, and/or various other types of feedback mechanisms. The haptic feedback system can be implemented independently of, within, and/or in conjunction with other VR devices.

By providing tactile sensations, audible content, and/or visual content, an artificial reality system can create a complete virtual experience or enhance a user's real-world experience in a variety of situations and environments. For example, an artificial reality system can assist or extend a user's perception, memory or cognition within a specific environment. Some systems may enhance a user's interaction with others in the real world, or may enable more immersive interactions with others in a virtual world. Artificial reality systems may also be used for educational purposes (e.g., for teaching or training in schools, hospitals, government organizations, military organizations, businesses, etc.), entertainment purposes (e.g., for playing video games, listening to music, watching video content, etc.), and/or for accessibility purposes (e.g., as hearing aids, vision aids, etc.). Embodiments disclosed herein may enable or enhance a user's artificial reality experience in one or more of these contexts and environments and/or in other contexts and environments.

Process parameters and step sequences described and/or illustrated herein are given as examples only and may vary as desired. For example, although steps illustrated and/or described herein may be shown or discussed in a particular order, the steps do not necessarily need to be performed in the order illustrated or discussed. The various exemplary methods described and/or illustrated herein may also omit one or more of the steps described or illustrated herein, or include additional steps in addition to those disclosed.

The foregoing description has been provided to enable those of ordinary skill in the art to best utilize the illustrative embodiments disclosed herein in various ways. This illustrative description is not intended to be exhaustive or to be limited to any precise form disclosed. Many modifications and variations are possible without departing from the spirit and scope of the invention. The specific examples disclosed herein are to be considered in all respects as illustrative rather than restrictive. In determining the scope of the invention, reference should be made to any appended claims and their equivalents.

Unless otherwise indicated, as used in the specification and/or claims, the terms "connected to" and "coupled to" (and their derivatives) are to be interpreted as allowing direct and indirect (that is, via other elements or components ) to connect the two. In addition, the term "one (a or an)" as used in the specification and/or claims shall be deemed to mean "at least one of them". Finally, for ease of use, the terms "comprising" and "having" (and their derivatives) as used in the specification and/or claims are interchangeable with the word "comprising" and have the same meanings.

100: Equipment 102: conoscopic mirror 104: variable compensation element 106: Controller 202: front lens 204: rear end lens 206: Aperture diaphragm 210: circular polarizer 304: Phase plate positioning mechanism 400: system 402: display device 404: Corrective lens 406: Image 408: Image sensor 410: Imaging camera device 412: light source 414: optical tray 416: Optical path 502(1): Features 502(2): Features 502(3): Features 502(4): Features 502(5): Features 502(6): Features 502(7): Features 502(8): Features 502(9): Features 502(10): Features 502(11): Characteristics 502(12): Features 502(13): Features 502(14): Features 502(15): Features 502(16): Features 502(17): Features 502(18): Features 502(19): Characteristics 502(20): Features 502(21): Features 502(22): Features 502(23): Features 502(24): Features 502(25): Features 502(26): Features 502(27): Features 502(28): Features 502(29): Features 502(30): Features 502(31): Features 502(32): Features 600: method 610: Step 620: Step 630: step 640: step 700: Augmented Reality System 702: Eyewear 705: neck strap 710: frame 715(A): left display device 715(B): Display device on the right 720(A): Acoustic transducers 720(B): Acoustic Transducers 720(C): Acoustic transducers 720(D): Acoustic Transducers 720(E): Acoustic Transducers 720(F): Acoustic transducer 720(G): Acoustic Transducer 720(H): Acoustic Transducer 720(I): Acoustic transducers 720(J): Acoustic Transducer 725: Controller 730: wired connection 735: power supply 740: sensor 750:Associated controller 800:Virtual Reality System 802: Front rigid body 804: with 806(A): Output audio transducer 806(B): Output audio transducer

The accompanying drawings illustrate several illustrative embodiments and are a part of this specification. Together with the description below, the drawings illustrate and explain the various principles of the invention.

[ FIG. 1 ] is a diagram of an exemplary apparatus for selectively compensating a corrective lens applied to a display device during testing, according to one or more embodiments of the present invention.

[FIG. 2] Is a diagram of an exemplary conoscopic lens incorporated into an apparatus that facilitates selectively compensating for corrective lenses applied to a display device during testing, in accordance with one or more embodiments of the present invention .

[ FIG. 3 ] is a diagram of an exemplary apparatus for selectively compensating a corrective lens applied to a display device during testing, according to one or more embodiments of the present invention.

[ FIG. 4 ] is a diagram of an exemplary system for selectively compensating a corrective lens applied to a display device during testing, according to one or more embodiments of the present invention.

[ FIG. 5 ] is a diagram of an exemplary variable compensating element including various optional features that can be applied to conoscopic optics, according to one or more embodiments of the present invention.

[ FIG. 6 ] is a flowchart of an exemplary method for selectively compensating a corrective lens applied to a display device during testing, according to one or more embodiments of the present invention.

[ FIG. 7 ] is a diagram of exemplary augmented reality glasses that may be used in conjunction with embodiments of the present invention.

[ FIG. 8 ] is a diagram of an exemplary virtual reality headset that may be used in conjunction with embodiments of the present invention.

While the illustrative embodiments described herein are susceptible to various modifications and alternative forms, certain embodiments have been shown by way of example in the drawings and will be described in detail herein. However, the illustrative embodiments described herein are not intended to be limited to the particular forms disclosed. Rather, the present invention covers all modifications, combinations, equivalents, and alternatives falling within the scope of the present invention.

100: Equipment

102: conoscopic mirror

104: variable compensation element

106: Controller

Claims (20)

A device comprising: a conoscope configured to receive an image emitted by a display device through a corrective lens; a variable compensating element coupled to the conoscopic lens, wherein the variable compensating element is capable of selectively modifying the image emitted by the display device to compensate for an optical effect imparted to the image by the corrective lens; and a controller coupled to the variable compensation element, wherein the controller: receiving a compensation parameter representing the optical effect imparted by the corrective lens to the image; selecting a feature of the variable compensation element that compensates for the optical effect based at least in part on the compensation parameter; and Applying the feature of the variable compensation element to the image. The apparatus of claim 1, further comprising an image sensor coupled to the variable compensation element, wherein: the image sensor is configured to sense the image after the image is compensated by the feature of the variable compensation element; and The controller: when the image is sensed by the image sensor, receiving data representing the image from the image sensor; and A display parameter of the display device is determined based at least in part on the data representing the image. The device according to claim 2, wherein the display parameters include at least one of the following; a modulation transfer function of one of the display devices; A color uniformity measurement of the display device; a resolution of the display device; a measure of the clarity of the display device; or A brightness uniformity measurement of the display device. Such as the equipment of claim 2, wherein: the variable compensation element includes a phase plate array including a plurality of selectable features; and The controller selects one of the selectable features included on the phase plate array for application to the image before the image reaches the image sensor. The apparatus of claim 4, wherein the selectable features included on the phase plate array comprise at least one of a set of interlocking Ratnam-Berry phase optical elements. The apparatus of claim 4, further comprising a phase plate positioning mechanism communicatively coupled to the controller and configured to move the phase plate array; and Wherein the controller directs the phase plate positioning mechanism to move the phase plate array to a position such that the one of the selectable features is applied to the image as it passes through the conoscope. Such as the equipment of claim 6, wherein: The phase plate positioning mechanism includes one or more actuators; the conoscope includes an optical tray positioned in an optical path of the image; and The phase plate positioning mechanism engages the actuators to move the phase plate array relative to the optical tray such that the one of the selectable features is applied as the image traverses the optical path within the conoscope on the image. The apparatus of claim 2, wherein the controller provides the display parameter representing the display device to a user interface or a computing device for evaluation. The device as claimed in item 1, wherein the compensation parameter includes at least one of the following; the spherical power of one of the corrective lenses; a cylindrical power of the corrective lens; or A cylindrical axis of the correcting lens. The device as in claim 1, wherein the conoscope includes: a light collection lens configured to collect light representing the image emitted by the display device; and An image forming lens configured to form the image from the light for presentation on the image sensor. The apparatus of claim 1, wherein the light collection lens collects the light when the light is emitted by the display device within a viewing angle range. A system comprising: a display device including a corrective lens; and An imaging camera device, which is optically coupled to the display device, wherein the imaging camera device comprises: a conoscope configured to receive an image emitted by the display device through the corrective lens; a variable compensating element coupled to the conoscopic lens, wherein the variable compensating element is capable of selectively modifying the image emitted by the display device to compensate for an optical effect imparted to the image by the corrective lens; and a controller coupled to the variable compensation element, wherein the controller: receiving a compensation parameter representing the optical effect imparted by the corrective lens to the image; selecting a feature of the variable compensation element that compensates for the optical effect based at least in part on the compensation parameter; and Applying the feature of the variable compensation element to the image. The system of claim 12, wherein: the imaging camera device includes an image sensor coupled to the variable compensation element; the image sensor is configured to sense the image after the image is compensated by the feature of the variable compensation element; and The controller: when the image is sensed by the image sensor, receiving data representing the image from the image sensor; and A display parameter of the display device is determined based at least in part on the data representing the image. The system according to claim 13, wherein the display parameters include at least one of the following; a modulation transfer function of one of the display devices; A color uniformity measurement of the display device; a resolution of the display device; a measure of the clarity of the display device; or A brightness uniformity measurement of the display device. The system of claim 13, wherein: the variable compensation element includes a phase plate array including a plurality of selectable features; and The controller selects one of the selectable features included on the phase plate array for application to the image before the image reaches the image sensor. The system of claim 15, wherein the selectable features included on the phase plate array comprise at least one of a set of interrogated Ratnam-Berry phase optical elements. The system of claim 15, further comprising a phase plate positioning mechanism communicatively coupled to the controller and configured to move the phase plate array; and Wherein the controller directs the phase plate positioning mechanism to move the phase plate array to a position such that the one of the selectable features is applied to the image as it passes through the conoscope. The system of claim 17, wherein: The phase plate positioning mechanism includes one or more actuators; the conoscope includes an optical tray positioned in an optical path of the image; and The phase plate positioning mechanism engages the actuators to move the phase plate array relative to the optical tray such that the one of the selectable features is applied as the image traverses the optical path within the conoscope on the image. The system according to claim 12, wherein the controller provides a user interface or a computing device with display parameters representing the display device for evaluation. A method comprising: optically coupling a display device to a conoscope configured to receive an image emitted by the display device through a corrective lens; receiving a compensation parameter indicative of at least one optical effect imparted by the corrective lens to the image via a controller coupled to a variable compensation element positioned in an optical path of the conoscope; selecting, by the controller, a feature of the variable compensation element that compensates for the optical effect based at least in part on the compensation parameter; and The characteristic of the variable compensation element is applied to the image in the conoscopic mirror by the controller.

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