CN113834637A - Optical performance test system and method of optical module - Google Patents
Optical performance test system and method of optical module Download PDFInfo
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- CN113834637A CN113834637A CN202111000193.7A CN202111000193A CN113834637A CN 113834637 A CN113834637 A CN 113834637A CN 202111000193 A CN202111000193 A CN 202111000193A CN 113834637 A CN113834637 A CN 113834637A
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- 239000005304 optical glass Substances 0.000 claims description 8
- 208000001491 myopia Diseases 0.000 abstract description 24
- 206010020675 Hypermetropia Diseases 0.000 abstract description 20
- 201000009310 astigmatism Diseases 0.000 abstract description 20
- 230000004305 hyperopia Effects 0.000 abstract description 16
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses an optical performance test system and method of an optical module, wherein the optical performance test system of the optical module comprises: a camera; the diopter adjusting device is arranged on one side of the acquisition end of the camera, the optical module is arranged on one side of the diopter adjusting device, which is far away from the camera, and the diopter of the diopter adjusting device is matched with the diopter of the optical module; the camera is used for shooting a virtual image formed by the optical module. The technical scheme of the invention can realize the test of the optical performance of the optical module with different diopters (including myopia, hyperopia or astigmatism) at the same test position, and ensure the convenience and high efficiency of the test.
Description
Technical Field
The invention relates to the technical field of optical imaging, in particular to a system and a method for testing optical performance of an optical module.
Background
The abnormal state of human vision includes three forms of ametropia: myopia, hyperopia, and astigmatism. Among them, myopia means that when a human eye is in an accommodation relaxed state, parallel rays enter the human eye and are focused in front of the retina (in contrast to hyperopia, parallel rays are focused behind the retina), which results in that a clear object image cannot be formed on the retina. Astigmatism refers to the condition that after parallel rays enter eyes, the parallel rays cannot be focused at one point (focus) due to different refractive powers of the eyeballs on different meridian lines, so that a clear object image cannot be formed.
Currently, a general Augmented Reality (AR)/Virtual Reality (VR) module cannot adjust diopter, and generally, the Virtual image distance of the AR module is set to be infinity, and the Virtual image distance of the VR module is set to be 1 to 3 meters. In order to better adapt to the physiological needs of different customer groups, some AR/VR modules have added to the optical design functionality for correcting myopia, hyperopia or astigmatism, i.e. each AR/VR module may have a different power. The existing optical performance testing system is designed for the AR/VR module with the diopter of normal vision, although the testing distance between the camera and the AR/VR module in the optical performance testing system can be adjusted to complete the testing of the AR/VR module with the myopia or the hyperopia diopter, the adjusting operation is more complicated, the testing difficulty is increased undoubtedly, and in addition, the AR/VR module with the astigmatism diopter cannot be tested.
Disclosure of Invention
The invention mainly aims to provide an optical performance testing system and method of an optical module, and aims to test the optical performance of the optical module with different diopters (including myopia, hyperopia or astigmatism) at the same testing position and ensure the convenience and high efficiency of the test.
In order to achieve the above object, the present invention provides an optical performance testing system for an optical module, which is applied to the optical module, the optical performance testing system for the optical module includes:
a camera;
the diopter adjusting device is arranged on one side of the acquisition end of the camera, the optical module is arranged on one side of the diopter adjusting device, which is far away from the camera, and the diopter of the diopter adjusting device is matched with the diopter of the optical module;
the camera is used for shooting a virtual image formed by the optical module.
Optionally, the diopter adjusting device comprises a zoom lens, and the zoom lens is fixedly arranged at the collecting end of the camera;
the zoom lens is a mechanical zoom lens or a liquid lens.
Optionally, the diopter adjusting device further comprises:
the optical lens system comprises a plurality of astigmatic lenses, wherein the astigmatic lenses have different diopters and can be movably arranged so that one astigmatic lens is positioned in the extending direction of a collecting end of the camera.
Optionally, the diopter adjusting device further comprises:
the lens rotating disc is arranged along the circumferential direction of the lens rotating disc, and one of the lenses is positioned in the extending direction of the collecting end of the camera through the rotation of the lens rotating disc.
Optionally, the diopter adjustment device comprises:
the fixed focus lens is fixedly arranged at the acquisition end of the camera;
the optical glasses are near sight glasses or far sight glasses, the optical glasses have different diopters, and the optical glasses can be movably arranged so that one of the optical glasses is positioned in the extending direction of the acquisition end of the camera; the plurality of the astigmatic lenses have different diopters, and the plurality of the astigmatic lenses can be movably arranged, so that one of the astigmatic lenses is positioned in the extending direction of the acquisition end of the camera.
Optionally, when the diopter adjusting device includes a plurality of the sight glasses, the diopter adjusting device further includes: the glasses rotating disc is arranged in a plurality of the glasses along the circumferential direction of the glasses rotating disc, and one of the glasses is positioned in the extending direction of the collecting end of the camera through the rotation of the glasses rotating disc;
when the diopter adjusting device includes a plurality of the astigmatic lenses, the diopter adjusting device further includes: the lens rotating disc is arranged along the circumferential direction of the lens rotating disc, and one of the lenses is positioned in the extending direction of the collecting end of the camera through the rotation of the lens rotating disc.
In order to achieve the above object, the present invention further provides an optical performance testing method of an optical module, which is applied to the optical performance testing system of the optical module, where the optical performance testing system of the optical module includes a camera and a diopter adjusting device, and the optical performance testing method of the optical module includes the following steps:
acquiring diopter of the optical module;
adjusting diopter of the diopter adjusting device to be matched with diopter of the optical module according to diopter of the optical module;
and controlling the optical module to work, and shooting a virtual image formed by the optical module through the camera.
Further, diopter adjusting device includes a vision adjusting device, the vision adjusting device is a zoom lens, and the step of adjusting diopter of diopter adjusting device to match diopter of the optical module according to diopter of the optical module includes:
determining a target focal length corresponding to the zoom lens according to the diopter of the optical module;
and controlling the zoom lens to adjust to the target focal length.
Further, diopter adjusting device includes eyesight adjusting device, eyesight adjusting device includes a plurality of sight glasses and sight glass carousel, according to the diopter of optics module, adjust diopter adjusting device's diopter with the step that the diopter of optics module matches includes:
determining a first diopter corresponding to the eyesight glasses according to the diopter of the optical module;
determining a first rotation angle of the glasses rotary table according to the relative position between the glasses with the first diopter and the extending direction of the collection end of the camera;
and controlling the sight glass rotary disc to rotate according to the first rotation angle.
Further, diopter adjusting device includes astigmatism adjusting device, astigmatism adjusting device includes astigmatic mirror and astigmatic mirror carousel, according to the diopter of optics module, adjust diopter adjusting device's diopter and the step that the diopter of optics module matches includes:
determining a second diopter corresponding to the astigmatic lens according to the diopter of the optical module;
determining a second rotation angle of the astigmatic lens rotary table according to a relative position between the extended direction of the collection end of the camera and the glasses with the second diopter;
and controlling the astigmatic lens rotary table to rotate according to the second rotation angle.
In the technical scheme of the invention, the diopter adjusting device is arranged between the camera and the tested optical module, when the camera shoots a virtual image formed by the tested optical module through the diopter adjusting device, the diopter of the diopter adjusting device is matched with the diopter of the optical module, so that the diopters of the camera and the optical module can be mutually offset, and the influence of the diopter of the optical module on the optical performance test can be eliminated, thereby realizing the test of the optical performance of the optical module with different diopters (including myopia, hyperopia or astigmatism) at the same test position, avoiding frequently adjusting the test distance between the camera and the optical module, and ensuring the test to be convenient and efficient.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of an embodiment of an optical performance testing system of an optical module according to the present invention;
FIG. 2 is a schematic structural diagram of an optical performance testing system of an optical module according to another embodiment of the present invention;
FIG. 3 is a schematic flowchart of a first embodiment of a method for testing optical performance of an optical module according to the present invention;
FIG. 4 is a flowchart illustrating the step of step S20 in the second embodiment of the method for testing optical performance of an optical module according to the present invention;
FIG. 5 is a flowchart illustrating the step of step S20 in the third embodiment of the method for testing optical performance of an optical module according to the present invention;
FIG. 6 is a flowchart illustrating the step of step S20 in the fourth embodiment of the method for testing optical performance of an optical module according to the present invention.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The present invention provides an optical performance testing system 100 for an optical module.
In the embodiment of the present invention, as shown in fig. 1 to 2, the optical performance testing system 100 of the optical module is applied to an optical module 80, the optical performance testing system 100 of the optical module includes a camera 10 and a diopter adjusting device, the diopter adjusting device is disposed on one side of the collecting end of the camera 10, the optical module 80 is disposed on one side of the diopter adjusting device away from the camera 10, and the diopter of the diopter adjusting device is matched with the diopter of the optical module 80; the camera 10 is used for shooting a virtual image formed by the optical module 80.
Specifically, the optical module 80 may be an AR module or a VR module. During the test, arrange optical module 80 in the diopter adjusting device and deviate from the test position of camera 10 one side, at this moment, camera 10's optical axis, diopter adjusting device's optical axis and optical module 80's optical axis three collineation. Wherein, optical module 80 during operation, optical module 80 forms the image in the one side that deviates from camera 10 to backward converge and form corresponding virtual image in the one side towards camera 10, when camera 10 was shot, permeable diopter adjusting device caught the virtual image that optical module 80 formed. It is easy to understand that the camera 10 herein simulates human eyes, the camera 10 sends the acquired virtual image information to the processor of the testing system, and the virtual image information is analyzed by the processor, so that the testing of various optical performances of the optical module 80 can be completed.
It should be noted that, in the embodiment of the present invention, the tested optical module 80 may be an optical module 80 having a function of correcting eyesight (myopia or hyperopia) and/or astigmatism, that is, compared with the conventional optical module 80, a vision correcting lens (myopia correcting lens or hyperopia correcting lens) and/or astigmatism correcting lens are disposed in the tested optical module 80, and have a certain diopter. Diopter is the unit of the magnitude of the refractive power, expressed as D, meaning that parallel rays pass through the refractive material, and the refractive power of the refractive material is 1 diopter or 1D at a focus of 1 m. It is easy to understand that since different optical modules 80 have different diopters, if the camera 10 is used to directly capture the virtual images of different optical modules 80, the test distance between the camera 10 and the optical module 80 under test needs to be frequently changed to satisfy the condition of the optical performance test.
In the embodiment of the present invention, a diopter adjusting device is provided between the camera 10 and the optical module 80 to be tested. The diopter adjustment means has the function of adjusting diopter, i.e., adjusting diopter related to myopia, hyperopia or astigmatism, so that the diopter of the diopter adjustment means matches with the diopter of the optical module 80 to be tested. By matching, it is meant that the diopter of the diopter adjustment device and the diopter of the optical module 80 under test can be mutually offset. So, when camera 10 sees through diopter adjusting device and shoots the virtual image that tested optical module 80 becomes, diopter through adjusting diopter adjusting device and optical module 80's diopter phase-match, make the diopter of the two offset each other, thereby can eliminate the diopter of optical module 80 self and to the influence that optical property test caused, the realization is tested the optical property of optical module 80 of different diopters (including myopia, hyperopia or astigmatism) at same test position, and needn't frequently adjust the test distance between camera 10 and the optical module 80, make the convenient high efficiency of test.
In an embodiment, referring to fig. 1, the diopter adjusting device includes a zoom lens 20, and the zoom lens 20 is fixedly disposed at the collecting end of the camera 10.
The testing system of the present embodiment can perform optical performance testing on the optical module 80 with vision (myopia or hyperopia) correction function. The zoom lens 20 can be adjusted within a certain focal length range, so that the working distance thereof can be changed from the position a to the position B (as shown in fig. 1), and therefore, images of the optical module 80 at different positions within the working distance of the zoom lens 20 can be tested. The zoom lens 20 changes its diopter by adjusting its focal length to match with the diopter of the optical module 80 to be tested, so as to achieve the effect of mutual diopter cancellation, and thus, the optical performance of the optical module 80 with different diopters (including near-sighted or far-sighted) can be tested at the same testing position, the testing distance between the camera 10 and the optical module 80 does not need to be frequently adjusted, and the testing is convenient and efficient.
Specifically, the zoom lens 20 may be a mechanical zoom lens or a liquid lens. The mechanical zoom lens is a mechanical structure arranged on a lens to adjust the relative distance between a group of lenses arranged on the lens so as to change the light path in the lens, thereby achieving the purpose of changing the focal length of the lens. The liquid lens is simply a lens whose medium changes from glass to liquid. More precisely, it is a new optical element that dynamically adjusts the refractive index of the lens or changes the focal length by changing its surface shape, but the material is an optical liquid material that can change its shape. The focal length of a glass lens depends on the material and the curvature radius. Liquid lenses also follow the same basic principle, but are unique in that the radius of curvature, and thus the focal length, can be varied. The radius change adopts an electric control mode, and microsecond-level change can be realized. Based on the principle of bionics, the liquid lens has the working principle that when light passes through a water drop, the device is converted into a miniature camera lens, and when the water drop passes through a cylindrical small hole back and forth, a picture enters or departs from a focal range according to the distance between the lens and a shot object. Image capture is accomplished electronically automatically, while software can be used to automatically edit any unfocused frames, thereby allowing the operator to obtain a clear image. The focus-adjustable liquid lens changes its focal length by changing the shape (curvature) of the focusing mirror by electric current based on optical feedback. This process can be completed in a few microseconds. The unique mechanism can lead the system to omit a series of complex mechanical structures and become more rapid and compact.
Further, referring to fig. 1, the diopter adjusting device further includes: the astigmatic lenses 60 are provided, the astigmatic lenses 60 have different diopters, and the astigmatic lenses 60 are movably disposed so that one of the astigmatic lenses 60 is located in an extending direction of a capturing end of the camera 10.
The testing system of the present embodiment can perform an optical performance test on the optical module 80 having both the vision correction function and the astigmatism correction function, that is, the zoom lens 20 (or the fixed focus lens 30 and the vision mirror 40) is used in cooperation with the astigmatic lens 60. The astigmatic lenses 60 have different diopters, and the astigmatic lenses 60 with different diopters correspond to the astigmatic correction lenses of different optical modules 80 to be tested one by one. The plurality of astigmatic lenses 60 can be movable and positionable relative to the camera 10, and the astigmatic lenses 60 can be moved in a translational manner, a rotational manner, or a combination thereof. Through the activity setting of a plurality of astigmatic lenses 60, can select the astigmatic lens 60 that is positioned in the extending direction of the collection end of the camera 10 with the diopter phase-match of the optical module 80 to be tested, namely the optical axis of the astigmatic lens 60 is collinear with the optical axis of the camera 10, so that the diopter of the astigmatic lens 60 and the diopter of the optical module 80 are mutually offset, thereby the optical performance of the optical module 80 with different diopters (astigmatism) can be tested at the same test position, and the test is convenient and efficient.
Further, referring to fig. 1, the diopter adjusting device further includes: the astigmatic lens rotating disk 70 is arranged in a plurality of astigmatic lenses 60 along a circumferential direction of the astigmatic lens rotating disk 70, and one of the astigmatic lenses 60 is positioned in an extending direction of a collecting end of the camera 10 by the rotation of the astigmatic lens rotating disk 70.
Specifically, a rotating shaft may be disposed at the center of the astigmatic lens rotating disc 70, the rotating shaft is disposed parallel to the optical axis of the camera 10, the astigmatic lens rotating disc 70 may be provided with mounting openings along the circumferential direction thereof, the number of the mounting openings is the same as that of the plurality of astigmatic lenses 60, the plurality of astigmatic lenses 60 are respectively mounted in the corresponding mounting openings, and when the rotating disc rotates by a certain angle, one of the astigmatic lenses 60 is located in the extending direction of the collecting end of the camera 10, that is, the optical axis of the astigmatic lens 60 is collinear with the optical axis of the camera 10. Further, a driving member (e.g., a motor) may be provided to connect with the rotating shaft of the astigmatic lens rotating disk 70, so as to realize automatic control of the rotating process of the astigmatic lens rotating disk 70. So, when carrying out optical property test to optical module 80, rotate through driving piece drive astigmatic mirror carousel 70, can make with the diopter assorted astigmatic mirror 60 of the optical module 80 that tests rotate to the extending direction of the collection end of camera 10 for the diopter of astigmatic mirror 60 offsets each other with optical module 80's diopter, thereby can realize testing the optical property of the optical module 80 of different diopters at same test position, test convenient high efficiency.
In one embodiment, referring to fig. 2, the diopter adjusting device comprises: the fixed-focus lens 30 is fixedly arranged at the acquisition end of the camera 10, and the fixed-focus lens 40 and/or the astigmatic lenses 60 are/is arranged at the acquisition end of the camera 10; the plurality of the glasses 40 have different diopters, and the plurality of the glasses 40 can be movably arranged, so that one of the glasses 40 is located in the extending direction of the collecting end of the camera 10; the astigmatic lenses 60 have different refractive powers, and the astigmatic lenses 60 are movably disposed so that one of the astigmatic lenses 60 is located in an extending direction of the capturing end of the camera 10.
The embodiment specifically includes three cases, the first: fixed focus lens 30+ a plurality of sight glasses 40, second: fixed focus lens 30+ a plurality of astigmatic mirrors 60, third: a fixed focus lens 30+ a plurality of sight glasses 40+ a plurality of astigmatic lenses 60.
In the first case, the test system can perform optical performance tests on the optical module 80 with vision (near-sighted or far-sighted) correction. The fixed focus lens 30 is a lens with a fixed focal length and being not variable in focal length, and the plurality of sight glasses 40 (near sight glasses or far sight glasses) have different diopters respectively and can be matched with diopters of different optical modules 80. Wherein, a plurality of the sight glasses 40 can move and position relative to the camera 10, and the movement mode of the sight glasses 40 can be translation, rotation or the combination of the translation and the rotation. Through the activity setting of a plurality of sight glasses 40, can select the diopter assorted sight glass 40 with the optical module 80 that is being tested to be positioned in the extending direction of the collection end of camera 10, the optical axis of this sight glass 40 and the optical axis of camera 10 and the optical axis collineation of tight focus lens 30 promptly, so that the diopter of sight glass 40 and the diopter of optical module 80 offset each other, thereby can realize testing the optical property of the optical module 80 of different diopters (myopia or hyperopia) at same test position, and needn't frequently adjust the test distance between camera 10 and the optical module 80, it is convenient high-efficient to test.
In the second case, the test system can perform the optical performance test on the optical module 80 with the astigmatism correction function alone. The astigmatic lenses 60 have different diopters, and the astigmatic lenses 60 with different diopters correspond to the astigmatic correction lenses of different optical modules 80 to be tested one by one. The plurality of astigmatic lenses 60 can be movable and positionable relative to the camera 10, and the astigmatic lenses 60 can be moved in a translational manner, a rotational manner, or a combination thereof. Through the activity setting of a plurality of astigmatic lenses 60, can select the astigmatic lens 60 that is positioned in the extending direction of the collection end of the camera 10 with the diopter phase-match of the optical module 80 to be tested, namely the optical axis of the astigmatic lens 60 is collinear with the optical axis of the camera 10, so that the diopter of the astigmatic lens 60 and the diopter of the optical module 80 are mutually offset, thereby the optical performance of the optical module 80 with different diopters (astigmatism) can be tested at the same test position, and the test is convenient and efficient.
In the third case, the testing system can perform optical performance testing on the optical module 80 having both the vision (myopia or hyperopia) correction function and the astigmatism correction function, and during the testing, one of the matched glasses 40 and one of the matched astigmatic lenses 60 are sequentially arranged along the extending direction of the collecting end of the camera 10, and the testing method refers to the above method, which is not described herein again.
In particular, the sight glasses 40 are near sight glasses or far sight glasses.
The glasses 40 can be divided into near vision glasses and far vision glasses according to the difference of the positive and negative diopters of the glasses 40. Correspondingly, the plurality of glasses 40 on the glasses turntable 50 can be set as a plurality of myopes with different diopters, and the myopes with different diopters correspond to the myopic corrective glasses of different tested optical modules 80 one by one; or the plurality of the visual lenses 40 on the visual lens rotating disc 50 are set to be a plurality of the distance lenses with different diopters, and the plurality of the distance lenses with different diopters correspond to the tested far-vision correcting lenses of different optical modules 80 one by one; of course, a plurality of near vision lenses with different diopters and a plurality of distance vision lenses with different diopters can be simultaneously arranged on the glasses rotating disc 50, and the near vision lenses or the distance vision lenses with different diopters correspond to the near vision lenses or the distance vision correcting lenses of the tested different optical modules 80 one by one.
Further, referring to fig. 2, when the diopter adjusting means includes a plurality of the glasses 40, the diopter adjusting means further includes: the goggle rotary table 50 is a plurality of the goggle 40 is arranged along the circumferential direction of the goggle rotary table 50, and the goggle rotary table 50 is rotated to enable one of the goggle 40 to be positioned on the extending direction of the collecting end of the camera 10.
Specifically, the center of the goggle rotary table 50 can be provided with a rotary shaft, the rotary shaft is parallel to the optical axis of the camera 10, the goggle rotary table 50 can be provided with mounting openings the same as the plurality of goggles 40 in number along the circumferential direction of the goggle rotary table, the plurality of goggles 40 are respectively mounted in the corresponding mounting openings, when the rotary table rotates a certain angle, one of the goggles 40 is positioned in the extending direction of the collecting end of the camera 10, namely, the optical axis of the goggle 40 is collinear with the optical axis of the camera 10. Further, a driving member (e.g., a motor) may be provided to connect with the rotation shaft of the glasses rotation disk 50, so as to realize automatic control of the rotation process of the glasses rotation disk 50. So, when carrying out optical property test to optical module 80, rotate through driving piece drive eyesight glasses carousel 50, can make with the diopter assorted eyesight glasses 40 that test optical module 80 rotate to the extending direction of the collection end of camera 10, make the diopter of eyesight glasses 40 and optical module 80's diopter offset each other, thereby can realize testing the optical property of the optical module 80 of different diopters at same test position, and needn't frequently adjust the test distance between camera 10 and the optical module 80, the convenient high efficiency of test.
Further, referring to fig. 2, when the diopter adjusting device includes a plurality of the astigmatic lenses 60, the diopter adjusting device further includes: the astigmatic lens rotating disk 70 is arranged in a plurality of astigmatic lenses 60 along a circumferential direction of the astigmatic lens rotating disk 70, and one of the astigmatic lenses 60 is positioned in an extending direction of a collecting end of the camera 10 by the rotation of the astigmatic lens rotating disk 70.
Specifically, a rotating shaft may be disposed at the center of the astigmatic lens rotating disc 70, the rotating shaft is disposed parallel to the optical axis of the camera 10, the astigmatic lens rotating disc 70 may be provided with mounting openings along the circumferential direction thereof, the number of the mounting openings is the same as that of the plurality of astigmatic lenses 60, the plurality of astigmatic lenses 60 are respectively mounted in the corresponding mounting openings, and when the rotating disc rotates by a certain angle, one of the astigmatic lenses 60 is located in the extending direction of the collecting end of the camera 10, that is, the optical axis of the astigmatic lens 60 is collinear with the optical axis of the camera 10. Further, a driving member (e.g., a motor) may be provided to connect with the rotating shaft of the astigmatic lens rotating disk 70, so as to realize automatic control of the rotating process of the astigmatic lens rotating disk 70. So, when carrying out optical property test to optical module 80, rotate through driving piece drive astigmatic mirror carousel 70, can make with the diopter assorted astigmatic mirror 60 of the optical module 80 that tests rotate to the extending direction of the collection end of camera 10 for the diopter of astigmatic mirror 60 offsets each other with optical module 80's diopter, thereby can realize testing the optical property of the optical module 80 of different diopters at same test position, test convenient high efficiency.
Based on the above hardware architecture, the present invention provides a first embodiment of an optical performance testing method of an optical module 80, which is applied to the optical performance testing system 100 of the optical module described above, where the optical performance testing system 100 of the optical module includes a camera 10 and a diopter adjusting device, please refer to fig. 3, and in the first embodiment, the optical performance testing method of the optical module 80 includes the following steps:
s10, acquiring the diopter of the optical module 80;
s20, adjusting diopter of the diopter adjusting device to be matched with diopter of the optical module 80 according to diopter of the optical module 80;
and S30, controlling the optical module 80 to work, and shooting the virtual image formed by the optical module 80 through the camera 10.
In this embodiment, the optical performance testing system 100 of the optical module includes a processor, such as a CPU, a network interface, a user interface, a memory, and a communication bus. Wherein the communication bus is used for realizing connection communication among the components. The user interface may comprise a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface may also comprise a standard wired interface, a wireless interface. The network interface may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory may be a high-speed RAM memory or a non-volatile memory, such as a disk memory. The memory may alternatively be a storage device separate from the aforementioned processor. Wherein the camera 10 and the diopter adjustment means are connected to the processor. During testing, the optical module 80 is connected to the processor.
During the test, arrange optical module 80 in the diopter adjusting device and deviate from the test position of camera 10 one side, at this moment, camera 10's optical axis, diopter adjusting device's optical axis and optical module 80's optical axis three collineation. Wherein, optical module 80 during operation, optical module 80 forms the image in the one side that deviates from camera 10 to backward converge and form corresponding virtual image in the one side towards camera 10, when camera 10 was shot, permeable diopter adjusting device caught the virtual image that optical module 80 formed. It is easy to understand that the camera 10 herein simulates human eyes, the camera 10 sends the acquired virtual image information to the processor of the testing system, and the virtual image information is analyzed by the processor, so that the testing of various optical performances of the optical module 80 can be completed.
In the embodiment of the present invention, a diopter adjusting device is provided between the camera 10 and the optical module 80 to be tested. The diopter adjustment means has the function of adjusting diopter, i.e., adjusting diopter related to myopia, hyperopia or astigmatism, so that the diopter of the diopter adjustment means matches with the diopter of the optical module 80 to be tested. By matching, it is meant that the diopter of the diopter adjustment device and the diopter of the optical module 80 under test can be mutually offset. So, when camera 10 sees through diopter adjusting device and shoots the virtual image that tested optical module 80 becomes, diopter through adjusting diopter adjusting device and optical module 80's diopter phase-match, make the diopter of the two offset each other, thereby can eliminate the diopter of optical module 80 self and to the influence that optical property test caused, the realization is tested the optical property of optical module 80 of different diopters (including myopia, hyperopia or astigmatism) at same test position, and needn't frequently adjust the test distance between camera 10 and the optical module 80, make the convenient high efficiency of test.
Referring to fig. 4, the present invention provides a second embodiment of a method for testing optical performance of an optical module 80, based on the first embodiment, the diopter adjusting device includes a zoom lens 20, and the step S20 includes:
s21, determining a target focal length corresponding to the zoom lens 20 according to the diopter of the optical module 80;
and S22, controlling the zoom lens 20 to adjust to the target focal length.
In this embodiment, the zoom lens 20 may be a mechanical zoom lens or a liquid lens. When the zoom lens 20 is a mechanical zoom lens, after the target focal length corresponding to the diopter of the optical module 80 is determined, the lens distance required to be adjusted by the mechanical zoom lens can be further determined based on the corresponding relationship between the lens distance and the focal length of the mechanical zoom lens, and the lens distance can be adjusted by controlling the mechanical components of the mechanical zoom lens to act. When the zoom lens 20 is a liquid lens, after the target focal length corresponding to the diopter of the optical module 80 is determined, the target current of the liquid lens can be further determined based on the corresponding relationship between the working current of the liquid lens and the focal length, and the liquid lens is controlled to work by applying a current to the liquid lens according to the determined target current.
So, when carrying out optical performance test to optical module 80, according to the different diopter of optical module 80, can be through adjusting the focus of zoom lens 20, make the diopter of zoom lens 20 and optical module 80's diopter phase-match, reach the effect that the diopter of the two offsets each other, thereby can eliminate optical module 80 self diopter to optical performance test's influence, realize testing optical performance to the optical module 80 of different diopters at same test position, and needn't frequently adjust the test distance between camera 10 and the optical module 80, make the convenient high efficiency of test.
Referring to fig. 5, the present invention provides a third embodiment of a method for testing optical performance of an optical module 80, based on the first embodiment, the diopter adjusting device includes a plurality of glasses 40 and a glasses rotary table 50, and the step S20 includes:
s23, determining a first diopter corresponding to the sight glass 40 according to the diopter of the optical module 80;
s24, determining a first rotation angle of the glasses carousel 50 according to the relative position between the glasses 40 with the first diopter and the extending direction of the collecting end of the camera 10;
and S25, controlling the eyesight glasses rotary disc 50 to rotate according to the first rotation angle.
In this embodiment, the plurality of glasses 40 (near-sighted glasses or far-sighted glasses) have different diopters respectively, and the plurality of glasses 40 with different diopters correspond to the vision correction glasses (near-sighted correction glasses or far-sighted correction glasses) of the different tested optical modules 80 one by one. The center of the sight glass rotary disc 50 can be provided with a rotary shaft, the rotary shaft is parallel to the optical axis of the camera 10, the sight glass rotary disc 50 can be provided with mounting openings the same as the plurality of sight glasses 40 in number along the circumferential direction of the sight glass rotary disc, the sight glasses 40 are respectively mounted in the corresponding mounting openings, when the rotary disc rotates for a certain angle, one of the sight glasses 40 is positioned in the extending direction of the collecting end of the camera 10, namely, the optical axis of the sight glass 40 is collinear with the optical axis of the camera 10. Further, a driving member (e.g., a motor) can be provided to connect with the rotation shaft of the glasses rotation disk 50, and the driving member is controlled by the processor to realize automatic control of the rotation process of the glasses rotation disk 50. So, when carrying out optical property test to optical module 80, rotate through driving piece drive eyesight glasses carousel 50, can make with the diopter assorted eyesight glasses 40 that test optical module 80 rotate to the extending direction of the collection end of camera 10 for the diopter of eyesight glasses 40 offsets each other with optical module 80's diopter, thereby can realize testing the optical property of the optical module 80 of different diopters at same test position, test convenient high efficiency.
Referring to fig. 6, the present invention provides a fourth embodiment of a method for testing optical performance of an optical module 80, based on the first, second or third embodiment, wherein the diopter adjusting device includes an astigmatic lens 60 and an astigmatic lens rotating disc 70, and the step S20 includes:
s26, determining a second diopter corresponding to the astigmatic lens 60 according to the diopter of the optical module 80;
s27, determining a second rotation angle of the astigmatic lens rotating disk 70 according to the relative position between the extended direction of the glasses 40 having the second diopter and the collection end of the camera 10;
and S28, controlling the astigmatic mirror rotating disc 70 to rotate by a second rotating angle.
In this embodiment, the astigmatic lenses 60 have different diopters, and the astigmatic lenses 60 with different diopters correspond to the astigmatic correction lenses of different optical modules 80 under test one by one. The center of the astigmatic lens rotating disc 70 can be provided with a rotating shaft, the rotating shaft is parallel to the optical axis of the camera 10, the astigmatic lens rotating disc 70 can be provided with mounting ports along the circumferential direction thereof, the number of the mounting ports is the same as that of the plurality of astigmatic lenses 60, the plurality of astigmatic lenses 60 are respectively mounted in the corresponding mounting ports, when the rotating disc rotates by a certain angle, one of the astigmatic lenses 60 is positioned in the extending direction of the collecting end of the camera 10, namely, the optical axis of the astigmatic lens 60 is collinear with the optical axis of the camera 10. Further, a driving member (e.g., a motor) may be provided to be connected to the rotating shaft of the astigmatic lens rotating disk 70, and the driving member is controlled by the processor to realize automatic control of the rotating process of the astigmatic lens rotating disk 70. So, when carrying out optical property test to optical module 80, rotate through driving piece drive astigmatic mirror carousel 70, can make with the diopter assorted astigmatic mirror 60 of the optical module 80 that tests rotate to the extending direction of the collection end of camera 10 for the diopter of astigmatic mirror 60 offsets each other with optical module 80's diopter, thereby can realize testing the optical property of the optical module 80 of different diopters at same test position, test convenient high efficiency.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The utility model provides an optical property test system of optical module which characterized in that is applied to optical module, optical module's optical property test system includes:
a camera;
the diopter adjusting device is arranged on one side of the acquisition end of the camera, the optical module is arranged on one side of the diopter adjusting device, which is far away from the camera, and the diopter of the diopter adjusting device is matched with the diopter of the optical module;
the camera is used for shooting a virtual image formed by the optical module.
2. The system for testing optical performance of an optical module according to claim 1, wherein the diopter adjusting means comprises a zoom lens, and the zoom lens is fixedly disposed at the capturing end of the camera;
the zoom lens is a mechanical zoom lens or a liquid lens.
3. The optical performance testing system of an optical module of claim 2, wherein said diopter adjustment device further comprises:
the optical lens system comprises a plurality of astigmatic lenses, wherein the astigmatic lenses have different diopters and can be movably arranged so that one astigmatic lens is positioned in the extending direction of a collecting end of the camera.
4. The optical performance testing system of an optical module of claim 3, wherein said diopter adjustment device further comprises:
the lens rotating disc is arranged along the circumferential direction of the lens rotating disc, and one of the lenses is positioned in the extending direction of the collecting end of the camera through the rotation of the lens rotating disc.
5. The optical performance testing system of an optical module of claim 1, wherein said diopter adjusting means comprises:
the fixed focus lens is fixedly arranged at the acquisition end of the camera;
the optical glasses are near sight glasses or far sight glasses, the optical glasses have different diopters, and the optical glasses can be movably arranged so that one of the optical glasses is positioned in the extending direction of the acquisition end of the camera; the plurality of the astigmatic lenses have different diopters, and the plurality of the astigmatic lenses can be movably arranged, so that one of the astigmatic lenses is positioned in the extending direction of the acquisition end of the camera.
6. The optical performance testing system of an optical module of claim 5, wherein when said diopter adjustment means comprises a plurality of said sight glasses, said diopter adjustment means further comprises: the glasses rotating disc is arranged in a plurality of the glasses along the circumferential direction of the glasses rotating disc, and one of the glasses is positioned in the extending direction of the collecting end of the camera through the rotation of the glasses rotating disc;
when the diopter adjusting device includes a plurality of the astigmatic lenses, the diopter adjusting device further includes: the lens rotating disc is arranged along the circumferential direction of the lens rotating disc, and one of the lenses is positioned in the extending direction of the collecting end of the camera through the rotation of the lens rotating disc.
7. An optical performance testing method of an optical module applied to the optical performance testing system of the optical module according to any one of claims 1 to 6, the optical performance testing system of the optical module comprising a camera and a diopter adjusting device, the optical performance testing method of the optical module comprising the steps of:
acquiring diopter of the optical module;
adjusting diopter of the diopter adjusting device to be matched with diopter of the optical module according to diopter of the optical module;
and controlling the optical module to work, and shooting a virtual image formed by the optical module through the camera.
8. The method for testing optical performance of an optical module according to claim 7, wherein the diopter adjusting device comprises a zoom lens, and the step of adjusting the diopter of the diopter adjusting device to match the diopter of the optical module according to the diopter of the optical module comprises:
determining a target focal length corresponding to the zoom lens according to the diopter of the optical module;
and controlling the zoom lens to adjust to the target focal length.
9. The method for testing optical performance of an optical module according to claim 7, wherein the diopter adjusting device comprises a plurality of glasses and a glasses rotary table, and the step of adjusting the diopter of the diopter adjusting device to match the diopter of the optical module according to the diopter of the optical module comprises:
determining a first diopter corresponding to the eyesight glasses according to the diopter of the optical module;
determining a first rotation angle of the glasses carousel based on a relative position between the glasses having the first diopter and the camera;
and controlling the sight glass rotary disc to rotate according to the first rotation angle.
10. The method for testing optical performance of an optical module according to any one of claims 7 to 9, wherein the diopter adjusting device comprises a plurality of astigmatic lenses and astigmatic lens rotating discs, and the step of adjusting the diopter of the diopter adjusting device to match the diopter of the optical module according to the diopter of the optical module comprises:
determining a second diopter corresponding to the astigmatic lens according to the diopter of the optical module;
determining a second rotation angle of the astigmatic lens turret based on a relative position between the astigmatic lens having the second refractive power and the camera;
and controlling the astigmatic lens rotary table to rotate according to the second rotation angle.
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