CN115855454A - Detection device and method for near-to-eye display products adaptive to different diopters - Google Patents
Detection device and method for near-to-eye display products adaptive to different diopters Download PDFInfo
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Abstract
The invention relates to a detection device and a method for near-to-eye display products adapting to different diopters, which comprises the following steps: the image receiving device is arranged on one side of the detection head and used for imaging the near-to-eye display product; and the compensation module and the detection head are arranged on the same side of the image receiving device, and the compensation module is configured to have different focal powers so as to be matched with the detection head to correct the light rays with different diopters to the same emergent angle. Because the compensation module with different focal powers is collocated on the detection equipment, the imaging detection of near-to-eye display products with different focal powers can be realized by selecting different focal powers to be matched with the detection head, the system is more universal, the focal power of the compensation module can be directly adjusted, different lenses do not need to be customized, the realization cost is lower, and the later maintenance is simple.
Description
Technical Field
The invention relates to the field of detection of virtual reality/augmented reality display products, in particular to a device and a method for detecting near-to-eye display products with different diopters.
Background
With the development of the technology, the near-eye display technology is receiving more and more attention and applications. The near-eye display is different with respect to the conventional flat panel display. Conventional flat panel displays include cell phones, notebook displays, television displays, and outdoor large screen displays. The display distance is at least the distance of the eye's photopic vision (250 mm). And for near-eye display (including augmented reality/virtual display, mixed reality and the like), the display product of the near-eye display belongs to a head-mounted product, and the distance between the human eyes and the display module is less than 250mm. The original image is displayed by the luminous micro/micro oled, and then the image displayed by the display panel is converted into a virtual image at a long distance by an optical element group (such as a lens group or a grating waveguide), and the virtual image is observed by human eyes.
Because the eye balls of different consumers have different convergence capabilities for light, it is desirable to produce such near-eye display products that are capable of adapting to the near/far vision conditions of different consumers. Therefore, for the same AR product, the parameters of the lens module will be different for consumers with different myopia degrees. The same is true for other VR/MR products.
And for factories producing AR/VR and MR, the yield of products can be improved through the quality detection of near-eye display products, and defective products are prevented from flowing into the hands of consumers. Currently, this is detected manually by an operator, who then needs different degrees of myopia/hyperopia. Or alternatively, by automated inspection equipment instead of human labor. Therefore, there is a technical difficulty in how to detect near-eye display products with different diopters.
In the related art, at present, the simplest way is to design different imaging systems to match display products of different diopters. However, such cost is too high, the imaging system generally comprises a lens and a camera, and different lenses are designed and customized to adapt to different diopters, so that the lens customization cost is high, and the system maintenance cost is high, and therefore, it is necessary to design a new detection apparatus and method for adapting to near-eye display products with different diopters to overcome the above problems.
Disclosure of Invention
The embodiment of the invention provides a detection device and a detection method suitable for near-eye display products with different diopters, and aims to solve the problems that different lenses are designed and customized in the related art, the customization cost is high, and the system maintenance cost is high.
In a first aspect, there is provided a detection apparatus for accommodating near-eye display products of different diopters, comprising: the image receiving device is arranged on one side of the detection head and used for imaging the near-to-eye display product; and the compensation module and the detection head are arranged on the same side of the image receiving device, and the compensation module is configured to have different focal powers so as to be matched with the detection head to correct the light rays with different diopters to the same emergent angle.
In some embodiments, the compensation module is a liquid lens, and the power variation of the liquid lens is controlled by voltage.
In some embodiments, the compensation module comprises a plurality of compensation parts, the focal power of different compensation parts is different, and the detection of near-eye display products with different diopters is realized by switching different compensation parts to be matched with the detection head.
In some embodiments, the compensator includes, but is not limited to, a prism, a diffractive device, a mirror, or a lens.
In some embodiments, the compensation module is located inside the detection head, or between the detection head and the image receiving device, or on a side of the detection head away from the image receiving device.
In some embodiments, the image receiving device includes, but is not limited to, an image sensor or a single point spectrometer, a color camera, an imaging luminance meter or a colorimeter.
In a second aspect, a method for detecting near-eye display products with different diopters is provided, which comprises the following steps: lightening a near-eye display product to emit light; adjusting a compensation module to be the focal power corresponding to the diopter of a near-eye display product, so that light emitted by the near-eye display product is imaged on an image receiving device through the compensation module and a detection head, wherein the compensation module is configured to have different focal powers so as to be matched with the detection head to correct the light rays with different diopters to the same emergent angle; and judging whether the near-eye display product is qualified or not according to the acquired image.
In some embodiments, the adjusting the compensation module to an optical power corresponding to a diopter of the near-eye display product comprises: and controlling the focal power change of the compensation module through voltage to adjust the compensation module to the focal power corresponding to the diopter of the near-to-eye display product.
In some embodiments, before said adjusting the compensation module to an optical power corresponding to a diopter of the near-eye display product, further comprises: continuously adjusting the focal power of the compensation module, and imaging and photographing the near-to-eye display product; and judging to obtain the diopter parameter of the near-to-eye display product through the image definition degree of the image.
In some embodiments, the compensation module comprises a plurality of compensators, different ones of the compensators having different optical powers, the adjusting the compensation module to an optical power corresponding to a diopter of the near-eye display product comprising: the compensation module is adjusted to be focal power corresponding to the diopter of the near-to-eye display product by switching different compensation pieces to be matched with the detection head.
The technical scheme provided by the invention has the beneficial effects that:
the embodiment of the invention provides detection equipment and a method for near-eye display products with different diopters, because the detection equipment is matched with compensation modules with different focal powers, the imaging detection of the near-eye display products with different diopters can be realized by selecting different focal powers to be matched with a detection head, the system is more universal, the focal power of the compensation module can be directly adjusted, different lenses do not need to be customized, the realization cost is lower, and the later maintenance is simple.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a detection apparatus adapted to near-eye display products with different diopters according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of various arrangement positions of a compensation module according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a detection head according to an embodiment of the present invention;
FIG. 4 is an initial design value for a near-eye display product;
FIG. 5 is a graph of uncorrected results at-4D myopia;
fig. 6 is a result diagram of a simple correction by the detection method provided by the embodiment of the present invention.
In the figure:
1. a detection head; 2. an image receiving device; 3. a compensation module; 4. a corrective layer; 5. a light source.
Description of the preferred embodiment
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The embodiment of the invention provides detection equipment and a detection method for near-to-eye display products with different diopters, which can solve the problems of high customization cost and high system maintenance cost caused by designing and customizing different lenses in the related technology.
Referring to fig. 1, a detection apparatus for accommodating near-eye display products with different diopters according to an embodiment of the present invention may include: the detection device comprises a detection head 1, wherein an image receiving device 2 is arranged on one side of the detection head 1, the image receiving device 2 is used for imaging a near-eye display product, when the detection head 1 and the image receiving device 2 are arranged in front and back, the image receiving device 2 can be placed behind the detection head 1, and when the detection head 1 and the image receiving device 2 are arranged in up and down, the image receiving device 2 can be placed above the detection head 1; and the compensation module 3, the compensation module 3 can be disposed on the same side of the image receiving device 2 as the detection head 1, and the compensation module 3 is configured to have different focal powers so as to cooperate with the detection head 1 to correct the light rays with different diopters to the same emergent angle. The same exit angle may be parallel light of a normal eyeball or other angles, and it is ensured that the image receiving device 2 can image light at the angle.
In order to adapt to consumers with different myopia/hyperopia degrees, near-eye display products with different diopters can be designed, wherein the near-eye display product suitable for normal eyes can be used without adding any additional correction layer 4, while for myopia and hyperopia eyes, the near-eye display product can be provided with the correction layer 4, and for the near-eye correction layer 4, emergent rays are diverged; for the presbyopia correction layer 4, the emergent rays are converged; for perfectly normal glasses, it is a parallel light; the emergent rays of the display images of the near-eye display products with different diopters are different.
In this embodiment, the compensation module 3 with different focal powers is collocated on the detection device, that is, the focal power of the compensation module 3 is variable, the compensation module 3 is adjusted to be the focal power corresponding to the diopter of the near-to-eye display product and is matched with the detection head 1, so that the imaging detection of the near-to-eye display product with different diopters can be realized, the system is more universal, and the focal power of the compensation module 3 can be directly adjusted, so that different lenses do not need to be customized, the realization cost is lower, and the later maintenance is simple.
Further, referring to fig. 2 and 3, the detection head 1 may be a lens, and the detection head 1 is not limited to be coaxial or movable.
In some embodiments, the compensation module 3 may be a liquid lens, and when the compensation module operates, the liquid lens may be used to quickly compensate different diopters.
In some optional embodiments, the compensation module 3 includes a plurality of compensation members, different compensation members have different focal powers, and different compensation members can be independently disposed and switched with each other, and by switching different compensation members to cooperate with the detection head 1, detection of near-to-eye display products with different diopters can be achieved. Wherein, can also set up the runner through manual switching, install a plurality of compensators on the runner, through switching that step-by-step will be faster than the mode of runner, the precision is higher, and can realize switching in succession. In this embodiment, the same set of check out test set can realize the detection to different products through the different compensation pieces of collocation, and equipment is more general.
Further, the compensation member includes, but is not limited to, a prism, a diffraction device, a mirror, or a lens. The compensation piece can be a single lens sheet or a lens group consisting of a plurality of lenses, and the plurality of compensation pieces are all used for compensating emergent rays with different diopters and have consistent effects.
Generally, the larger the number of the compensation elements, the better the imaging quality of the continuous different diopters can be realized, but a limited number, such as 5 or 8, can also be set; since a slight change in diopter does not affect a large change in imaging quality, it can be set according to the image resolution determination requirement.
On the basis of the above technical solution, referring to fig. 2, in some alternative embodiments, the compensation module 3 may be located inside the detection head 1, or between the detection head 1 and the image receiving device 2, or on a side of the detection head 1 away from the image receiving device 2. That is, the position of the compensation module 3 is not limited to the outside of the detection head 1, and may be inside the detection head 1, near the front and back positions of the detection head 1, near the image receiving device 2, near the correction layer 4 of the near-eye display product, or near the light source 5, where the light source 5 may be used to illuminate the near-eye display product, or may be a near-eye display product, and in this case, the near-eye display product may illuminate itself, and the position of the compensation module 3 in the present embodiment includes, but is not limited to, the above-mentioned positions.
In some embodiments, the image receiving device 2 includes, but is not limited to, an image sensor or a single point spectrometer, a color camera, an imaging luminance meter or a colorimeter. In this embodiment, the image receiving device 2 behind the detection head 1 may be a camera, or may be another type of detector, such as a single-point spectrometer, a color camera, or an imaging luminance meter, or other types of detectors, whose working principles are similar, but the detection receivers are different, and are all within the scope of the patent claims.
When the detection equipment suitable for the near-eye display products with different diopters is designed, the detection equipment is divided into two groups through modular design, wherein one group is a compensation group, namely the compensation module 3 is variable; the other group is a fixed group, and may be unchanged, that is, the detection head 1, the image receiving apparatus 2, and the like in the present embodiment.
Referring to fig. 4 to 6, in one embodiment, for a near-eye display product with a positive diopter of-4D, the image quality, i.e., MTF (optical modulation transfer function), of the near-eye display product is greatly reduced by 30% when no correction is made, and the MTF of the near-eye display product is greatly improved after compensation is performed by adding the compensation module 3. In which fig. 4 shows the initial design values of the near-eye display product, fig. 5 is a graph of the uncorrected results at-4D myopia, and fig. 6 shows the results after simple correction by the present method.
In the actual detection process, the near-eye display product can be placed below the detection equipment, the optimal imaging position is adjusted as required, and the near-eye display product is lightened to emit light. If the diopter parameter of the near-to-eye display product is known, the compensation module 3 corresponding to the focal power can be directly selected for imaging and photographing; if the diopter parameter of the near-to-eye display product is unknown, imaging photographing can be carried out by adjusting the focal power of the compensation module 3 one by one, and then the diopter parameter of the near-to-eye display product can be obtained through judgment of the image definition degree.
The embodiment of the invention also provides a detection method for near-to-eye display products adapting to different diopters, which comprises the following steps:
step 1: lightening the near-eye display product to emit light.
And 2, step: adjusting the compensation module 3 to the focal power corresponding to the diopter of the near-eye display product, so that the light emitted by the near-eye display product is imaged on the image receiving device 2 through the compensation module 3 and the detection head 1, wherein the compensation module 3 is configured to have different focal powers so as to be matched with the detection head 1 to correct the light rays with different diopters to the same emergent angle, and under the emergent angle, the image receiving device 2 can image the irradiated light.
And step 3: and judging whether the near-eye display product is qualified or not according to the acquired image. When judging whether the near-eye display product is qualified or not, two conditions can be met, wherein on one hand, a sufficiently clear picture image is formed, and on the other hand, the product can be called as a qualified product only through judgment of abnormity, defects and the like.
Further, in some embodiments, the adjusting the compensation module 3 to the optical power corresponding to the diopter of the near-eye display product may include: and controlling the focal power change of the compensation module 3 through voltage to adjust the compensation module 3 to the focal power corresponding to the diopter of the near-to-eye display product. In this embodiment, the compensation module 3 may be an integral compensation component, and the change of focal power can be realized by directly controlling the voltage change of the compensation module 3 without switching or moving the position of the compensation module 3. In this embodiment, the compensation module 3 is preferably a liquid lens, and of course, other types of lenses may be used if the focal power of the lenses can be controlled by voltage.
In some optional embodiments, before the adjusting the compensation module 3 to the optical power corresponding to the diopter of the near-eye display product, the method may further include: continuously adjusting the focal power of the compensation module 3, and imaging and photographing the near-to-eye display product; and judging and obtaining the diopter parameter of the near-to-eye display product according to the image definition degree of the image. In this embodiment, for a near-eye display product with unknown diopter parameter, the diopter parameter of the near-eye display product can be obtained in this way.
In some embodiments, the compensation module 3 may include a plurality of compensation members, different optical powers of the compensation members are different, and the adjusting the compensation module 3 to an optical power corresponding to a diopter of the near-eye display product may include: by switching different compensation parts to be matched with the detection head 1, the compensation module 3 is adjusted to have focal power corresponding to the diopter of the near-to-eye display product. Wherein, can remove one of them compensating part through manual, install another compensating part, also can rotate the switching through the mode of runner.
Further, the compensation member includes, but is not limited to, a prism, a diffraction device, a mirror, or a lens.
In some embodiments, the compensation module 3 is located inside the detection head 1, or between the detection head 1 and the image receiving device 2, or on a side of the detection head 1 away from the image receiving device 2.
Further, the image receiving device 2 includes, but is not limited to, an image sensor or a single-point spectrometer, a color camera, a luminance meter or a colorimeter for imaging.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It is to be noted that, in the present invention, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A detection apparatus for accommodating near-eye display products of different diopters, comprising:
the detection device comprises a detection head (1), wherein an image receiving device (2) is arranged on one side of the detection head (1), and the image receiving device (2) is used for imaging a near-to-eye display product;
and the compensation module (3) and the detection head (1) are arranged on the same side of the image receiving device (2), and the compensation module (3) is configured to have different focal powers so as to be matched with the detection head (1) to correct the light rays with different diopters to the same emergent angle.
2. The apparatus for detecting near-to-eye display accommodation of different diopters of products according to claim 1, wherein:
the compensation module (3) is a liquid lens, and the focal power of the liquid lens is controlled to change through voltage.
3. The apparatus for detecting near-to-eye display accommodation of different diopters of product according to claim 1, wherein:
the compensation module (3) comprises a plurality of compensation pieces, the focal powers of different compensation pieces are different, and the detection of near-to-eye display products with different diopters is realized by switching different compensation pieces to be matched with the detection head (1).
4. The apparatus for detecting near-to-eye display accommodation of different diopters of claim 3, wherein:
the compensation member includes, but is not limited to, a prism, a diffraction device, a mirror, or a lens.
5. The apparatus for detecting near-to-eye display accommodation of different diopters of products according to claim 1, wherein:
the compensation module (3) is positioned inside the detection head (1), or positioned between the detection head (1) and the image receiving device (2), or positioned on one side of the detection head (1) far away from the image receiving device (2).
6. The apparatus for detecting near-to-eye display accommodation of different diopters of products according to claim 1, wherein:
the image receiving device (2) includes but is not limited to an image sensor or a single-point spectrometer, a color camera, an imaging luminance meter or a colorimeter.
7. A detection method for near-eye display products adapting to different diopters is characterized by comprising the following steps:
lightening a near-eye display product to emit light;
adjusting a compensation module (3) to be the focal power corresponding to the diopter of a near-eye display product, and enabling light emitted by the near-eye display product to pass through the compensation module (3) and a detection head (1) to be imaged on an image receiving device (2), wherein the compensation module (3) is configured to have different focal powers so as to be matched with the detection head (1) to correct the light rays with different diopters to the same emergent angle;
and judging whether the near-eye display product is qualified or not according to the acquired image.
8. The detection method for near-eye display products with different diopters adapted according to claim 7, wherein the adjusting the compensation module (3) to the optical power corresponding to the diopter of the near-eye display products comprises:
and the focal power of the compensation module (3) is controlled by voltage to change, so that the compensation module (3) is adjusted to the focal power corresponding to the diopter of the near-to-eye display product.
9. The method for detecting near-eye display products adapted to different diopters according to claim 7, further comprising, before said adjusting the compensation module (3) to the optical power corresponding to the diopter of the near-eye display products:
continuously adjusting the focal power of the compensation module (3), and imaging and photographing the near-to-eye display product;
and judging to obtain the diopter parameter of the near-to-eye display product through the image definition degree of the image.
10. The method for detecting near-eye display products adapted to different diopters according to claim 7, wherein said compensation module (3) comprises a plurality of compensation members, different optical powers of said compensation members being different, said adjusting the compensation module (3) to an optical power corresponding to the diopter of the near-eye display products comprises:
the compensation module (3) is adjusted to the focal power corresponding to the diopter of the near-to-eye display product by switching different compensation pieces to be matched with the detection head (1).
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| CN114488534A (en) * | 2022-01-26 | 2022-05-13 | 深圳市光舟半导体技术有限公司 | AR glasses and related devices and methods |
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