CN111757102A - Super macro camera sharpness detection device and method - Google Patents

Abstract

The application provides a device and a method for detecting the definition of an ultra-micro distance camera; super little apart from camera definition detection device includes: the jig is used for fixing the mobile terminal; the image card is used for carrying out focusing test on the ultra-micro distance camera of the mobile terminal so as to carry out definition detection; the graphic card is arranged in the jig and provided with a test surface for the ultramicro-distance camera to carry out focusing test, test patterns are arranged on the test surface, and the test surface is inclined to the front end surface of the ultramicro-distance camera. Comprises a super-micro distance camera definition detection device. According to the device for detecting the definition of the ultra-micro-distance camera, the graphic card is installed in the jig, and when the graphic card is tested, the testing surface on the graphic card is inclined to the front end surface of the ultra-micro-distance camera, so that the ultra-micro-distance camera can be confirmed to be qualified in focusing; the ultramicro-range camera definition detection device can realize the detection of the ultramicro-range camera definition, and has the advantages of simple structure, low cost, simple and convenient test process and high accuracy.

Description

Super macro camera sharpness detection device and method

technical field

The present application belongs to the technical field of super-macro camera definition detection, and more particularly, relates to a super-macro camera definition detection device and method.

Background technique

At present, the camera resolution test of mobile terminals such as mobile phones and tablet computers generally uses automated test equipment; specifically, the automatic test equipment is used to adjust the position of the black and white checkerboard chart to the mobile terminal, so that the mobile terminal can shoot the black and white checkerboard chart. In order to calculate the SFR (English: spatial frequency response, Chinese: spatial frequency response, abbreviation: SFR) value of different fields of view, the resolution of the camera is evaluated according to the size of the SFR value. However, this camera resolution test method is only applicable to cameras with a focus position that is centimeters to meters from the front of the lens or cameras with a depth of field of several centimeters or even longer. With the increasing number of camera functions of mobile terminals, it has become a current development trend of mobile terminals to set up super macro lenses with magnifying glass and microscope functions on mobile terminals. The focusing position of the super macro lens is millimeters away from the front surface of the lens, or the depth of field is a very short distance of micrometers, which makes it impossible for the existing camera resolution test equipment to test the clarity of the super macro lens on the whole mobile terminal.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present application is to provide an apparatus and method for detecting the sharpness of a super-macro camera, so as to solve the problem that the resolution test equipment of the camera in the related art cannot perform the sharpness test of the ultra-macro lens on the whole mobile terminal. .

In order to achieve the above purpose, the technical solution adopted in the embodiment of the present application is to provide a device for detecting the sharpness of a super macro camera, including:

Jigs for securing mobile terminals; and,

A picture card, used for focusing test of the super macro camera of the mobile terminal for sharpness detection;

The picture card is installed in the fixture, the picture card has a test surface for the ultra-macro camera to perform a focus test, the test surface is provided with a test pattern, and the test surface is inclined to the Front face setup of the super macro camera.

In an optional embodiment, the distance difference between the opposite ends of the test surface and the front end surface of the super macro camera is Z, and the distance from one end of the test surface to the front end surface of the super macro camera is H, the distance from the other end of the test surface to the front end of the super macro camera is D, Z=H-D, and D is greater than or equal to the sum of the tolerance of the super macro camera and the tolerance of the fixture.

In an optional embodiment, the test pattern is a black and white line pair, and the density of the black and white line pair is T=1/2S, where S is the resolution of the super macro camera, and the unit of T is lp /mm.

In an optional embodiment, the cross section of the image card is triangular or trapezoidal, the image card has a bottom surface facing away from the super macro camera, and the bottom surface is arranged parallel to the front surface of the super macro camera .

In an optional embodiment, the chart includes a diaphragm on the test surface and a spacer supporting the diaphragm inclined to the front end surface of the super macro camera.

In an optional embodiment, the test pattern is photoetched on the test surface; or the test pattern is printed on the test surface.

In an optional embodiment, the fixture is further provided with a light guide member, and the light guide member is provided on the side of the picture card.

In an optional embodiment, the fixture is provided with a card slot for positioning and accommodating the mobile terminal.

In an optional embodiment, a cavity is opened in the fixture, and the image card is placed in the cavity.

In an optional embodiment, the device for detecting the sharpness of the super macro camera further comprises a support plate for supporting the picture card and a fine adjustment for fine-tuning the distance between the support plate and the front end surface of the super macro camera The support plate is supported on the fine-tuning piece, and the fine-tuning piece is mounted on the jig.

Another object of the embodiments of the present application is to provide a method for detecting the sharpness of a super macro camera, including the following steps:

Provide a picture card, the picture card has a test surface for the ultra-macro camera to perform a focus test, and the test surface is provided with a test pattern;

The super-macro camera on the mobile terminal is set facing the picture card, and the test surface of the picture card is set obliquely to the front face of the super-macro camera;

The super-macro camera is subjected to a focus test, and if the focus shot of the super-macro camera has the test pattern that is partially clear on the test surface, it is determined that the definition of the super-macro camera is qualified.

In an optional embodiment, the distance difference between the opposite ends of the test surface and the front end surface of the super macro camera is Z, and the distance from one end of the test surface to the front end surface of the super macro camera is H, the distance from the other end of the test surface to the front end of the super-macro camera is D, Z=H-D, and D is greater than or equal to the difference between the tolerance of the super-macro camera and the tolerance of the fixed position of the mobile terminal and.

The beneficial effect of the super-macro camera definition detection device provided by the embodiment of the present application is that, compared with the prior art, the super-macro camera definition detection device of the present application has the following advantages: The test surface on the chart is inclined to the front face of the super macro camera, which can confirm that the focus of the super macro camera is qualified; that is, the super macro camera clarity detection device can realize the super macro camera definition detection, and the device The structure is simple, the cost is low, and the testing process is simple, convenient and accurate.

The beneficial effects of the super-macro camera definition detection method provided by the embodiments of the present application are: compared with the prior art, the super-macro camera definition detection method of the present application has a simple and convenient testing process, high accuracy, and low cost.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings that are used in the description of the embodiments or exemplary technologies. Obviously, the drawings in the following description are only for the present application. In some embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic structural diagram 1 of a device for detecting sharpness of a super macro camera provided by an embodiment of the present application;

FIG. 2 is a second schematic structural diagram of a device for detecting sharpness of a super macro camera provided by an embodiment of the present application;

3 is a schematic structural diagram of a first image card provided by an embodiment of the present application;

4 is a schematic structural diagram of a second image card provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a third image card provided by an embodiment of the present application;

6 is a schematic structural diagram of a fourth image card provided by an embodiment of the present application;

7 is a schematic diagram of a process of sharpness detection of a super macro camera provided by an embodiment of the present application;

FIG. 8 is a schematic flowchart of a method for detecting sharpness of a super macro camera according to an embodiment of the present application.

Among them, the main symbols of each accompanying drawing in the figure are:

100-Super macro camera clarity detection device;

11-fixture; 111-card slot; 112-positioning protrusion; 1121-strip hole; 113-screw; 114-cavity; 12-light guide; 13-support plate; 14-fine adjustment piece; 15-bracket;

20-picture card; 21-test surface; 22-test pattern; 221-black and white line pair; 222-black and white checkerboard; 23-bottom; 24-diaphragm; 25-spacer;

91-mobile terminal; 92-super macro camera; 93-front face.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "front", "rear", "bottom", "inner", "outer", etc. are based on those shown in the accompanying drawings The orientation or positional relationship is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present application.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be a mechanical connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

Reference in this specification to "one embodiment," "some embodiments," or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application . Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in other embodiments," etc. in various places in this specification are not necessarily All refer to the same embodiment, but mean "one or more but not all embodiments" unless specifically emphasized otherwise. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.

Referring to FIG. 1 and FIG. 7 , the device 100 for detecting the sharpness of a super macro camera provided by the present application will now be described. The super-macro camera definition detection device 100 includes a fixture 11 and a picture card 20; wherein, the fixture 11 is used to fix the mobile terminal 91, so as to perform definition detection on the super-macro camera 92 of the mobile terminal 91; Fig. The card 20 is used for focusing test of the ultra-macro camera 92 of the mobile terminal 91 for sharpness detection. When the focus test is performed from the camera 92 , the test pattern 22 on the test surface 21 can be photographed. The graphic card 20 is installed in the fixture 11, so that when the mobile terminal 91 is fixed in the fixture 11, the graphic card 20 can be positioned on the front side of the super macro camera 92 of the mobile terminal 91, and the test surface of the graphic card 20 can be 21 is adjacent to the front end face 93 of the super macro camera 92 of the mobile terminal 91 so that the super macro camera 92 can shoot. The front surface 93 of the super macro camera 92 is the light incident surface of the super macro camera 92 when shooting, and the light incident side of the super macro camera 92 is the front side of the super macro camera 92 . During testing, if the mobile terminal 91 is fixed in the fixture 11, the picture card 20 can be positioned in front of the super macro camera 92 of the mobile terminal 91, and the test surface 21 on the picture card 20 can be adjacent to the super macro camera. 92, and make the test surface 21 inclined to the front end surface 93 of the super macro camera 92, so that at least part of the area on the test surface 21 is located within the focal length range of the super macro camera 92, then when the super macro camera 92 Part of the clear test pattern 22 on the test surface 21 can be photographed, then it can be confirmed that the super-macro camera 92 is qualified for focusing; that is, the super-macro camera sharpness detection device 100 can realize the detection of the sharpness of the ultra-macro camera 92, and The device has simple structure, low cost, simple and convenient testing process and high accuracy.

Compared with the prior art, the super-macro camera definition detection device 100 provided by the present application, by installing the picture card 20 in the fixture 11, during the test, the test surface 21 on the picture card 20 is inclined to the super-macro camera. The front end surface 93 of 92 can confirm that the focus of the super macro camera 92 is qualified; that is, the super macro camera sharpness detection device 100 can realize the detection of the sharpness of the ultra macro camera 92, and the device has a simple structure, low cost, and is suitable for testing. The process is simple, convenient and accurate.

In one embodiment, please refer to FIG. 1 and FIG. 7 , the distance difference between the opposite ends of the test surface 21 and the front end surface 93 of the super macro camera 92 is Z, and one end of the test surface 21 is from the front end surface of the super macro camera 92 The distance of 93 is H, the distance from the other end of the test surface 21 to the front end surface 93 of the super macro camera 92 is D, Z=H-D, and D is greater than or equal to the sum of the tolerance of the super macro camera 92 and the tolerance of the jig 11 . For an ordinary camera, the focal length is from a few centimeters to a few meters or more from the front face of the camera. The processing and assembly tolerances of each component in the camera are very small compared to the focal length of the camera, and the impact on the camera focus is also very small. . The components of the super macro camera 92 will inevitably have some tolerances when they are manufactured, produced and assembled; in addition, there will also be tolerances in the production of the jig 11 , and the tolerance of the jig 11 directly affects the position tolerance of the mobile terminal 91 . , which directly affects the position tolerance of the macro camera on the mobile terminal 91 ; the tolerance of the super macro camera 92 is the overall tolerance after the super macro camera 92 is assembled. As for the super macro camera 92 , since its focal length is millimeters or microns from the front end surface 93 of the super macro camera 92 , that is, its focal length is a few millimeters to 93 mm from the front end surface 93 of the super macro camera 92 . A few microns, for this extremely short focal length range, the processing and assembly tolerances of the components in the super macro camera 92 and the tolerances of the jig 11, the accumulation of these tolerances is compared with the focal length of the super macro camera 92. It is very large, that is, the tolerance of the super macro camera 92 and the tolerance of the fixture 11 have a great influence on the focusing of the super macro camera 92, which also causes the current camera test equipment to be unable to be applied to the focusing of the super macro camera 92. detection. In the embodiment of the present application, the distance difference Z between the opposite ends of the test surface 21 and the front end surface 93 of the super macro camera 92 is set to be greater than or equal to the sum of the tolerance of the super macro camera 92 and the tolerance of the fixture 11, Then the distance difference Z between the front end surfaces 93 of the super macro cameras 92 at opposite ends of the test surface 21 can compensate the influence of the tolerance of the super macro camera 92 and the tolerance of the fixture 11 on the super macro camera 92, and then This can facilitate the focus test of the super macro camera 92 of the mobile terminal 91 to ensure the accuracy of the test.

In one embodiment, please refer to FIG. 1 and FIG. 7 , the image card 20 is made of light-transmitting material. Since the focal length of the super macro camera 92 is very short, during the test, the distance between the test surface 21 of the picture card 20 and the front end surface 93 of the super macro camera 92 is also very short, which will block most of the ambient light from reaching the picture card 20. As a result, less light is obtained by the super macro camera 92, which affects the image quality and focusing speed. The picture card 20 is made of light-transmitting material, and the light generated by the flash light of the mobile terminal 91 or the external fill light can better reach the test surface 21 of the picture card 20, which can facilitate the super-macro camera 92 to take light, so as to improve the performance. Focusing speed and imaging quality ensure the accuracy and efficiency of testing.

In one embodiment, the test pattern 22 on the graphic card 20 can be fabricated by photolithography, so that the line edges of the test pattern 22 are kept smooth, so as to facilitate the focus test of the super macro camera 92 and reduce the size of the test pattern. The influence of the edge of the pattern 22 on the test of the super macro camera 92 improves the efficiency and accuracy of the test. In some embodiments, the test pattern 22 can also be printed on the test surface 21 . Of course, in some other embodiments, the test pattern 22 may be printed on the test surface 21 by using materials such as ink.

In one embodiment, the graphic card 20 may be made of glass material to ensure the strength and good light transmittance of the graphic card 20 . Moreover, it is made of glass material, and the test pattern 22 is photoetched on the glass, so that the edge of the test pattern 22 can be smoother. In some embodiments, the graphic card 20 can also be made of materials such as light-transmitting plastic.

In one embodiment, the chart 20 is a film made of film material, and the test pattern 22 can be printed on the film, and the use of the film can also ensure that the edge of the test pattern 22 is smooth.

In one embodiment, the fixture 11 is further provided with a light guide 12, and the light guide 12 is arranged on the side of the picture card 20, so as to better enable the light generated by the flash of the mobile terminal 91 or the external fill light, Arriving at the test surface 21 of the chart 20, it is convenient for the super macro camera 92 to take light, so as to improve the focusing speed and image quality, and ensure the accuracy and efficiency of the test.

In one embodiment, the light guide 12 is arranged around the picture card 20 to better guide the light generated by the flash of the mobile terminal 91 or the external fill light to enter the test surface 21 of the picture card 20 , which is convenient for the super macro camera 92 to pick up the light. Light.

In one embodiment, please refer to FIG. 1 , FIG. 2 and FIG. 7 , the fixture 11 is provided with a card slot 111 , and the card slot 111 is provided to accommodate and position the mobile terminal 91 , that is, during testing, the mobile terminal can be 91 is placed in the slot 111 to fix the mobile terminal 91 on the fixture 11 . Of course, in some embodiments, a baffle plate may also be provided on the fixture 11, and the mobile terminal 91 is positioned by the baffle plate. In still other embodiments, elastic clips or hooks may be provided on the fixture 11 to clamp and fix the mobile terminal 91 .

In one embodiment, a plurality of positioning protrusions 112 are installed on the side wall of the card slot 111 , and the mobile terminal 91 is fixed in the card slot 111 through the positioning protrusions 112 to facilitate positioning and fixing of the mobile terminal 91 . In one embodiment, each positioning protrusion 112 is fixed on the side wall of the card slot 111 by a screw 113 , and each positioning protrusion 112 is provided with an elongated hole 1121 , and the screw 113 passes through the elongated hole 1121 on the corresponding positioning protrusion 112 , so as to be installed on the side wall, and then the position of the positioning protrusion 112 on the side wall can be adjusted to correct the deviation of the mobile terminal 91 so that the super macro camera 92 of the mobile terminal 91 can be aligned with the image card 20 in the fixture 11 .

In one embodiment, please refer to FIG. 1 , FIG. 2 and FIG. 7 , a cavity 114 is opened in the fixture 11 , and the image card 20 is placed in the cavity 114 . A cavity 114 is provided in the jig 11 to facilitate positioning and installation of the image card 20 , and further, when the mobile terminal 91 is installed on the jig 11 , it can facilitate the positioning between the image card 20 and the super macro camera 92 of the mobile terminal 91 .

In one embodiment, the light guide 12 can be disposed in the cavity 114 , which can reduce the footprint and can guide light into the chart 20 .

In one embodiment, please refer to FIG. 1 , FIG. 2 and FIG. 7 , the super-macro camera sharpness detection device 100 further includes a support plate 13 and a fine adjustment member 14 , the image card 20 is supported on the support plate 13 , and the support plate 13 Supported on the fine-tuning member 14, the fine-tuning member 14 is used to fine-tune the distance between the support plate 13 and the front end surface 93 of the super macro camera 92, and the image card 20 is installed on the support plate 13, the image card can be adjusted by the fine-tuning member 14. 20 to the distance from the front end face 93 of the super macro camera 92 to adapt to the super macro cameras 92 of different focal lengths.

In one embodiment, the support plate 13 can be set in the cavity 114 of the fixture 11 , and the fine adjustment member 14 can be used to fine-tune the position of the support plate 13 in the cavity 114 , and then the image card 20 can be adjusted in the cavity 114 Location. This structure can reduce the thickness of the jig 11 .

In one embodiment, the fine adjustment member 14 may be a micrometer. In other embodiments, the fine adjustment member 14 may be a precision bolt. In still other embodiments, the fine adjustment member 14 may be a combination structure of a bolt and a grating ruler, the position of the support plate 13 is adjusted through the bolt, and the adjusted position or distance is checked through the grating ruler. Of course, in other embodiments, the fine-tuning member 14 may also be other structural members that can fine-tune the distance.

In one embodiment, the super-macro camera definition detection apparatus 100 further includes a bracket 15 for supporting the fixture 11 , and the bracket 15 is arranged to support the fixture 11 , thereby facilitating the installation of the mobile terminal 91 on the fixture 11 .

In one embodiment, the fine adjustment member 14 may be mounted on the bracket 15 to facilitate supporting the fine adjustment member 14 . In still other embodiments, the fine adjustment member 14 can be directly fixed on the fixture 11 .

In one embodiment, please refer to FIG. 2 , the cross section of the image card 20 is trapezoidal, and the image card 20 has a bottom surface 23 , the bottom surface 23 is the side of the image card 20 facing away from the mobile terminal 91 , that is, the bottom surface 23 is the image card The side facing away from the super macro camera 92 on the 20, and the bottom surface 23 is set parallel to the front end surface 93 of the super macro camera 92, so that the test surface 21 of the chart 20 can be supported and inclined to the front end surface 93 of the super macro camera 92 .

In one embodiment, please refer to FIG. 3 , the cross section of the image card 20 is triangular, and the image card 20 has a bottom surface 23 , the bottom surface 23 is the side of the image card 20 facing away from the mobile terminal 91 , that is, the bottom surface 23 is the image card The side facing away from the super macro camera 92 on the 20, and the bottom surface 23 is set parallel to the front end surface 93 of the super macro camera 92, so that the test surface 21 of the chart 20 can be supported and inclined to the front end surface 93 of the super macro camera 92 .

In one embodiment, please refer to FIG. 6 , the chart 20 includes a diaphragm 24 and a spacer 25 , the diaphragm 24 has a test surface 21 , and the diaphragm 24 is mounted on the spacer 25 and supported by the spacer 25 Diaphragm 24 so that the diaphragm 24 is inclined to the front end surface 93 of the super macro camera 92 , so that the test surface 21 of the chart 20 is inclined to the front end surface 93 of the super macro camera 92 . As in one embodiment, the diaphragm 24 may be a film. Of course, in some other embodiments, the diaphragm 24 may also be other sheet-like parts, such as a light-transmitting plastic sheet.

In one embodiment, referring to FIG. 2 , the test pattern 22 on the image card 20 may be a pair of black and white lines 221 . In other embodiments, please refer to FIG. 5 , the test pattern 22 on the image card 20 may be a black and white checkered pattern 222 . In still other embodiments, the test pattern 22 on the graphic card 20 may also be other patterns used to test the resolution of the camera.

In one embodiment, please refer to FIG. 2, the test pattern 22 on the chart 20 is a black and white line pair 221, the density of the black and white line pair 221 is T, the unit of T is lp/mm, T=1/2S, wherein , S is the resolution of the super macro camera 92 , so as to better test the definition and resolution of the super macro camera 92 of the mobile terminal 91 and improve the accuracy of the test.

The super-macro camera definition detection device 100 of the embodiment of the present application has a simple structure and low cost, and can quickly and accurately test the definition of the super-macro camera 92 .

Referring to FIG. 7 and FIG. 8 , an embodiment of the present application further provides a method for detecting the sharpness of a super macro camera 92 . The method for detecting the sharpness of the super macro camera 92 includes the following steps:

S1: Provide a picture card 20, the picture card 20 has a test surface 21 for the super macro camera 92 to perform a focus test, and the test surface 21 is provided with a test pattern 22;

S2: set the super macro camera 92 on the mobile terminal 91 facing the picture card 20, and make the test surface 21 of the picture card 20 inclined to the front end surface 93 of the super macro camera 92;

S3: The super-macro camera 92 performs a focus test. If the super-macro camera 92 has the test pattern 22 that is partially clear on the test surface 21 in the focus-shot image, it is determined that the super-macro camera 92 92 definition is qualified.

The chart 20 has a test surface 21 on which a test pattern 22 is provided, so that when the super macro camera 92 of the mobile terminal 91 performs a focus test, the test pattern 22 on the test surface 21 can be photographed. During the test, the picture card 20 is located on the front side of the super macro camera 92 of the mobile terminal 91, and the test surface 21 on the picture card 20 is adjacent to the front end surface 93 of the super macro camera 92, and the test surface 21 is inclined to the super macro camera 92. The front end surface 93 of the macro camera 92, so that at least part of the area on the test surface 21 is located within the focal length range of the super macro camera 92, then when the super macro camera 92 can capture a part of the clear test pattern 22 on the test surface 21 , it can be confirmed that the focus of the super macro camera 92 is qualified, and the test process is simple, convenient and accurate.

In one embodiment, please refer to FIG. 7 and FIG. 8 , the distance difference between the opposite ends of the test surface 21 and the front end surface 93 of the super macro camera 92 is Z, and one end of the test surface 21 is from the front end surface of the super macro camera 92 The distance of 93 is H, the distance from the other end of the test surface 21 to the front surface 93 of the super macro camera 92 is D, Z=H-D, and D is greater than or equal to the tolerance of the super macro camera 92 and the fixed position of the mobile terminal 91. Sum. The components of the super macro camera 92 must have some tolerances when they are manufactured, produced and assembled; in addition, there are often certain tolerances when the mobile terminal 91 is installed and fixed; the tolerance of the super macro camera 92 is super micro Overall tolerance from camera 92 after assembly. As for the super macro camera 92 , since its focal length is millimeters or microns from the front end surface 93 of the super macro camera 92 , that is, its focal length is a few millimeters to 93 mm from the front end surface 93 of the super macro camera 92 . A few microns, for this extremely short focal length range, the processing and assembly tolerances of the components in the super macro camera 92 and the tolerances of the jig 11, the accumulation of these tolerances is compared with the focal length of the super macro camera 92. In other words, it is very large, that is, the tolerance of the super macro camera 92 and the tolerance of the fixed position of the mobile terminal 91 have a great influence on the focusing of the super macro camera 92 . And the distance difference Z between the opposite ends of the test surface 21 and the front end surface 93 of the super macro camera 92 is set to be greater than or equal to the sum of the tolerance of the super macro camera 92 and the tolerance of the fixed position of the mobile terminal 91, then the test surface 21 The distance difference Z between the front faces 93 of the super-macro cameras 92 at opposite ends can compensate the influence of the tolerance of the super-macro camera 92 and the tolerance of the fixture 11 on the super-macro camera 92, thereby facilitating the mobile terminal Focus test of 91's super macro camera 92 to ensure the accuracy of the test.

In one embodiment, please refer to FIG. 7 , the image card 20 is made of light-transmitting material. Since the focal length of the super macro camera 92 is very short, during the test, the distance between the test surface 21 of the picture card 20 and the front end surface 93 of the super macro camera 92 is also very short, which will block most of the ambient light from reaching the picture card 20. As a result, less light is obtained by the super macro camera 92, which affects the image quality and focusing speed. The picture card 20 is made of light-transmitting material, and the light generated by the flash light of the mobile terminal 91 or the external fill light can better reach the test surface 21 of the picture card 20, which can facilitate the super-macro camera 92 to take light, so as to improve the performance. Focusing speed and imaging quality ensure the accuracy and efficiency of testing.

In one embodiment, the test pattern 22 on the graphic card 20 can be fabricated by photolithography, so that the line edges of the test pattern 22 are kept smooth, so as to facilitate the focus test of the super macro camera 92 and reduce the size of the test pattern. The influence of the edge of the pattern 22 on the test of the super macro camera 92 improves the efficiency and accuracy of the test. In some embodiments, the test pattern 22 can also be printed on the test surface 21 . Of course, in some other embodiments, the test pattern 22 may be printed on the test surface 21 by using materials such as ink.

In one embodiment, the graphic card 20 may be made of glass material to ensure the strength and good light transmittance of the graphic card 20 . Moreover, it is made of glass material, and the test pattern 22 is photoetched on the glass, so that the edge of the test pattern 22 can be smoother. In some embodiments, the graphic card 20 can also be made of materials such as light-transmitting plastic.

In one embodiment, the chart 20 is a film made of film material, and the test pattern 22 can be printed on the film, and the use of the film can also ensure that the edge of the test pattern 22 is smooth.

In one embodiment, please refer to FIG. 7 , the cross section of the image card 20 is trapezoidal, and the image card 20 has a bottom surface 23 , the bottom surface 23 is the side of the image card 20 facing away from the mobile terminal 91 , that is, the bottom surface 23 is the image card The side facing away from the super macro camera 92 on the 20, and the bottom surface 23 is set parallel to the front end surface 93 of the super macro camera 92, so that the test surface 21 of the chart 20 can be supported and inclined to the front end surface 93 of the super macro camera 92 .

In one embodiment, please refer to FIG. 3 , the cross section of the image card 20 is triangular, and the image card 20 has a bottom surface 23 , the bottom surface 23 is the side of the image card 20 facing away from the mobile terminal 91 , that is, the bottom surface 23 is the image card The side facing away from the super macro camera 92 on the 20, and the bottom surface 23 is set parallel to the front end surface 93 of the super macro camera 92, so that the test surface 21 of the chart 20 can be supported and inclined to the front end surface 93 of the super macro camera 92 .

In one embodiment, please refer to FIG. 6 , the chart 20 includes a diaphragm 24 and a spacer 25 , the diaphragm 24 has a test surface 21 , and the diaphragm 24 is mounted on the spacer 25 and supported by the spacer 25 Diaphragm 24 so that the diaphragm 24 is inclined to the front end surface 93 of the super macro camera 92 , so that the test surface 21 of the chart 20 is inclined to the front end surface 93 of the super macro camera 92 .

In one embodiment, referring to FIG. 2 , the test pattern 22 on the image card 20 may be a pair of black and white lines 221 . In other embodiments, please refer to FIG. 5 , the test pattern 22 on the image card 20 may be a black and white checkered pattern 222 . In still other embodiments, the test pattern 22 on the graphic card 20 may also be other patterns used to test the resolution of the camera.

In one embodiment, please refer to FIG. 2, the test pattern 22 on the chart 20 is a black and white line pair 221, the density of the black and white line pair 221 is T, the unit of T is lp/mm, T=1/2S, wherein , S is the resolution of the super macro camera 92 , so as to better test the definition and resolution of the super macro camera 92 of the mobile terminal 91 and improve the accuracy of the test.

The method for detecting the sharpness of the super-macro camera 92 in the embodiment of the present application can be implemented by using the apparatus 100 for detecting the sharpness of the ultra-macro camera provided in the embodiment of the present application.

The method for detecting the sharpness of the super macro camera 92 of the present application has the advantages of simple and convenient testing process, high accuracy and low cost.

The above descriptions are only optional embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection of the present application. within the range.

Claims (12)

1. Super macro camera clarity detection device, is characterized in that, comprises: Jigs for securing mobile terminals; and, A picture card, used for focusing test of the super macro camera of the mobile terminal for sharpness detection; The picture card is installed in the fixture, the picture card has a test surface for the ultra-macro camera to perform a focus test, the test surface is provided with a test pattern, and the test surface is inclined to the Front face setup of the super macro camera. 2. The super-macro camera sharpness detection device as claimed in claim 1, wherein the distance difference from the opposite ends of the test surface to the front end of the super-macro camera is Z, and the test surface The distance from one end of the test surface to the front end of the super macro camera is H, and the distance from the other end of the test surface to the front end of the super macro camera is D, Z=H-D, and D is greater than or equal to the super micro camera The sum of the tolerance from the camera and the tolerance of the fixture. 3. The super-macro camera sharpness detection device of claim 1, wherein the test pattern is a pair of black and white lines, and the density of the pair of black and white lines is T=1/2S, wherein S is the For the resolution of the super macro camera, the unit of T is lp/mm. 4. The super-macro camera definition detection device according to claim 1, wherein the cross-section of the picture card is a triangle or a trapezoid, and the picture card has a bottom surface away from the super-macro camera, so that the The bottom surface is arranged parallel to the front end surface of the super macro camera. 5 . The super-macro camera definition detection device according to claim 1 , wherein the picture card comprises a diaphragm of the test surface and a diaphragm supporting the diaphragm inclined to the front end of the super-macro camera. 6 . gasket. 6. The super-macro camera definition detection device according to any one of claims 1-5, wherein: the test pattern is photoetched on the test surface; or the test pattern is printed on the on the test surface. 7. The super-macro camera definition detection device according to any one of claims 1-5, wherein the fixture is further provided with a light guide, and the light guide is arranged on the image card side. 8. The super-macro camera definition detection device according to any one of claims 1-5, wherein the fixture is provided with a card slot for positioning and accommodating the mobile terminal. 9 . The super-macro camera definition detection device according to claim 1 , wherein a cavity is opened in the fixture, and the image card is placed in the cavity. 10 . 10. The super-macro camera sharpness detection device according to any one of claims 1-5, wherein the ultra-macro camera sharpness detection device further comprises a support plate for supporting the picture card and a A fine-tuning piece for fine-tuning the distance between the support plate and the front end surface of the super-macro camera, the support board is supported on the fine-tuning piece, and the fine-tuning piece is mounted on the jig. 11. Super macro camera definition detection method, is characterized in that, comprises the steps: Provide a picture card, the picture card has a test surface for the ultra-macro camera to perform a focus test, and the test surface is provided with a test pattern; The super-macro camera on the mobile terminal is set facing the picture card, and the test surface of the picture card is set obliquely to the front face of the super-macro camera; The super-macro camera is subjected to a focus test, and if the focus shot of the super-macro camera has the test pattern that is partially clear on the test surface, it is determined that the definition of the super-macro camera is qualified. 12. The super-macro camera definition detection method according to claim 11, wherein the distance difference between the opposite ends of the test surface and the front end of the super-macro camera is Z, and the test surface The distance from one end of the test surface to the front end of the super macro camera is H, and the distance from the other end of the test surface to the front end of the super macro camera is D, Z=H-D, and D is greater than or equal to the super micro camera The sum of the tolerance from the camera and the tolerance of the fixed position of the mobile terminal.

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