CN213301631U

CN213301631U - Image sensor test equipment

Info

Publication number: CN213301631U
Application number: CN202021522753.6U
Authority: CN
Inventors: 高骏晨; 张太永; 吴恒宇; 马宣; 胡竹林; 武万多; 王兆民
Original assignee: Orbbec Inc
Current assignee: Orbbec Inc
Priority date: 2020-07-25
Filing date: 2020-07-25
Publication date: 2021-05-28
Anticipated expiration: 2030-07-25

Abstract

The utility model discloses an image sensor test equipment, include: a lower frame provided with an upper end surface and a control device inside; the device comprises a material displacement table, a backlight screen testing component, an integrating sphere testing component and a calibration plate testing component, wherein the material displacement table, the backlight screen testing component, the integrating sphere testing component and the calibration plate testing component are arranged on the upper end surface; the material displacement table is slidably provided with a material placing assembly for loading an image sensor to be detected; the material placing assembly is configured to carry the image sensor to be tested to slide above the material displacement table under the control of the control device so as to reach the test position of the backlight screen test assembly, the test position of the integrating sphere test assembly and the test position of the calibration plate test assembly to carry out corresponding tests respectively. The utility model discloses image sensor test equipment automation integrated level is high, has saved the space; and a plurality of test processes can be completed only by one-time feeding and discharging, so that the problems of repeated operation and power on and off of multiple feeding and discharging are effectively solved, the detection efficiency is effectively improved, and the production cost is reduced.

Description

Image sensor test equipment

Technical Field

The utility model belongs to the technical field of the optical test, especially, relate to an image sensor test equipment.

Background

With the development of artificial intelligence technologies such as machine vision and human-computer interaction, optical modules are beginning to be widely applied to the fields of mobile phones, robots, various intelligent vision hardware markets and the like. The optical module generally includes a projection module and an imaging module (the imaging module is usually an infrared module or an RGB module). Before the optical module is put on the market, a series of strict performance tests must be performed, in which the performance of the image sensor, which is an important component in the imaging module, directly affects the quality of the captured image, and thus affects the performance of the optical module and the performance of the hardware product using the optical module, so it is necessary to perform strict tests on the performances of the image sensor.

At present, the performance detected by an image sensor usually includes noise, quantum efficiency, time or spatial contrast, etc., but the integration level of the test equipment for detecting the above performance in the prior art is low, and a plurality of test equipment are needed to complete the tests of all the above performances, which not only wastes the space utilization rate and causes the detection cost to rise, but also reduces the detection efficiency.

Therefore, in order to overcome the above-mentioned drawbacks of the prior art, it is necessary to develop and research to provide a solution for solving the problems of low device integration level, low efficiency and high cost in testing multiple performances of the sensor in the conventional image sensor detection.

The above background disclosure is only for the purpose of assisting understanding of the inventive concept and technical solutions created by the present invention, and does not necessarily belong to the prior art of the present patent application, and should not be used for evaluating the novelty and inventive step of the present application in the case that there is no clear evidence that the above contents are disclosed at the filing date of the present patent application.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art not enough, provide an image sensor test equipment to solve current image sensor lower and the higher problem of cost of efficiency when a plurality of functional test.

In order to achieve the above object, the embodiment of the present invention provides a technical solution that:

an image sensor testing apparatus comprising:

a lower frame provided with an upper end surface and a control device inside;

the material displacement table, the backlight screen testing component, the integrating sphere testing component and the calibration plate testing component are arranged on the upper end face and are in communication connection with the control device; wherein the content of the first and second substances,

the material displacement table is slidably provided with a material placing assembly for loading an image sensor to be detected; the material placing assembly is configured to carry an image sensor to be tested to slide above the material displacement table under the control of the control device so as to reach a test position of the backlight screen test assembly, a test position of the integrating sphere test assembly and a test position of the calibration plate test assembly to carry out corresponding tests respectively.

In some embodiments, the backlight screen testing assembly is disposed on one side of the material displacement table, and includes a vertical slide rail extending in a vertical direction, and a backlight screen placing assembly slidably mounted on the vertical slide rail and configured to receive a backlight screen.

In some embodiments, the integrating sphere testing assembly is arranged on one side of the material displacement table and comprises a height adjusting plate extending along the vertical direction and an integrating sphere placing assembly arranged on the height adjusting plate and used for accommodating the integrating sphere.

In some embodiments, the calibration plate testing assembly is disposed at an end of the material displacement table away from the backlight screen testing assembly and the integrating sphere testing assembly, and includes a supporting frame and a sliding frame mounted on the supporting frame and accommodating the calibration plate.

In some embodiments, the device further comprises a housing and an interaction component arranged on the housing; the lower rack, the material displacement table, the backlight screen testing component, the integrating sphere testing component and the calibration plate testing component are all arranged in the inner cavity of the outer cover; the interaction assembly is connected with the control device and is controlled by the control device.

In some embodiments, the material displacement table comprises a first servomotor and a first linear stage connected to the first servomotor; wherein the first servomotor is used for driving the first linear platform under the control of the control device; the material placing assembly is slidably mounted on the first linear platform, so that the material placing assembly is driven by the first servo motor to move to the test position of each test assembly along the first linear platform to be tested.

In some embodiments, the material placing assembly comprises a first sliding block erected on the first linear platform, a translation sliding table, a first angle adjusting sliding table, a lifting sliding table and a material placing plate, wherein the translation sliding table, the first angle adjusting sliding table, the lifting sliding table and the material placing plate are stacked and mounted on the upper end surface of the first sliding block.

In some embodiments, the backlight screen placing assembly comprises a second sliding block erected on the vertical sliding rail, a backlight screen placing frame groove, and a first connecting piece connecting the second sliding block and the backlight screen placing frame groove.

In some embodiments, the integrating sphere placing assembly comprises a supporting block detachably mounted on the height adjusting plate, a second angle adjusting sliding table stacked on the upper end surface of the supporting block, an integrating sphere mounting plate and a second connecting piece.

In some embodiments, the support frame comprises a base, a top plate, and a guide shaft connecting the base and the top plate; the calibration plate testing assembly further comprises ball screws which are symmetrically and fixedly arranged on the bases on the two sides respectively and are parallel to the guide shafts, and the ball screws penetrate through the sliding frame and the top plate and then are fixed on the top plate.

The utility model discloses technical scheme's beneficial effect is:

the utility model integrates a plurality of testing functions on a multi-station testing workbench, has high automation integration level and saves space; and a plurality of test procedures can be completed only by one-time feeding and discharging, so that the problems of repeated operation and power on and off of multiple feeding and discharging are effectively solved, the detection efficiency is improved, the investment of equipment, manpower, space and the like is saved to a certain extent, and the effect of reducing the production cost is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 these drawings without inventive exercise.

Fig. 1 is a perspective view of an image sensor testing apparatus according to an embodiment of the present invention;

FIG. 2 is a perspective view of another embodiment of the present invention;

FIG. 3 is a diagram illustrating a partial structure of an image sensor testing apparatus according to an embodiment of the present invention;

fig. 4 is a structural diagram of a material displacement table of the image sensor testing apparatus according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a partial structure of an integrating sphere testing assembly of the image sensor testing apparatus according to an embodiment of the present invention;

fig. 6 is a partial structural illustration of a calibration board testing assembly of the image sensor testing apparatus according to an embodiment of the present invention;

fig. 7 is a diagram illustrating another partial structure of a calibration board testing assembly of the image sensor testing apparatus according to an embodiment of the present invention.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

It will be further understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner" and "outer" refer to an orientation or positional relationship as shown in the drawings, which are used for convenience in describing and simplifying the invention, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered limiting of the invention.

Referring to fig. 1, an embodiment of the present invention provides an image sensor testing apparatus. As shown in fig. 1, the test apparatus includes a lower frame 1, the lower frame 1 having an upper end surface 2 and a control device (not shown) built therein; a material displacement table 3, a backlight screen testing component 4, an integrating sphere testing component 5 and a calibration plate testing component 6 which are in communication connection with a control device are arranged on the upper end surface 2 of the lower frame 1; wherein, the material displacement table 3 is slidably provided with a material placing component 30 for loading an image sensor (not shown) to be measured; the backlight screen testing component 4 is arranged on one side of the material displacement table 3 and comprises a vertical slide rail 40 extending along the vertical direction and a backlight screen placing component (not numbered) which is slidably arranged on the vertical slide rail 40 and is used for accommodating a backlight screen; the integrating sphere testing assembly 5 is arranged on one side of the material displacement table 3 and comprises a height adjusting plate 50 extending along the vertical direction and an integrating sphere 51 placing assembly (not numbered) which is arranged on the height adjusting plate 50 and used for containing the integrating sphere; the calibration plate testing component 6 is arranged at one end of the material displacement table 3, which is far away from the backlight screen testing component 4 and the integrating sphere testing component 5, and comprises a supporting rack 60 and a sliding frame 61 which is arranged on the supporting rack 60 and is accommodated with a calibration plate; the material placing assembly 30 is configured to carry the image sensor to be tested to slide above the material displacement table 3 under the control of the control device so as to reach the test position of the backlight screen test assembly, the test position of the integrating sphere test assembly, and the test position of the calibration plate test assembly to perform corresponding tests respectively.

In one embodiment, the integrating sphere testing component 5 is disposed on the same side or different side of the backlight screen testing component 4, and the material placing component 30 can reach the testing position of the backlight screen testing component first and also reach the testing position of the integrating sphere testing component first. It should be noted that the backlight screen in the backlight screen placement component is mainly used for testing the gain, dark current noise, reading noise and well filling of the image sensor; the integrating sphere 51 in the integrating sphere testing assembly 5 is mainly used for testing the quantum efficiency of the image sensor; the calibration plate in the calibration plate test assembly 6 is mainly used for testing the modulation contrast of the image sensor. By the arrangement, a plurality of test functions can be integrated on the multi-station test workbench, so that the space is saved; and a plurality of test procedures can be completed only by one-time feeding and discharging, so that the problems of repeated operation and power on and off of multiple feeding and discharging are effectively solved, the detection efficiency is effectively improved, the automation integration level of equipment is also improved, the input cost of equipment, manpower, space and the like is saved, and the effect of reducing the production cost is finally achieved.

Referring to fig. 2, in some embodiments, the testing apparatus further includes a housing (not numbered), and an interactive component (not shown) mounted on the housing; the lower frame 1, the material displacement table 3, the backlight screen testing component 4, the integrating sphere testing component 5 and the calibration plate testing component 6 are all arranged in the inner cavity of the outer cover. The interactive component is connected with the control device and is controlled by the control device, specifically, an input instruction is input through the interactive component or a test program arranged in the control device is executed, and a process is output and a test result is displayed through the interactive component; the interactive component may be a combination of components such as the display 7 and the keyboard 8, or other devices capable of performing human-computer interaction such as a touch screen operated by touch, the keyboard 8 may be installed in a keyboard box, and the keyboard box has a rotation and pull function, and can be stored in the lower rack to avoid occupying space when not operated.

In some embodiments, the side and the front of the outer cover are respectively provided with a side-by-side door, the material taking and placing operation can be carried out through the front side-by-side door, and the debugging operation of each internal station can be carried out through the side-by-side door. The door is tightly buckled by magnetic force after being closed; the magnetic buckle is attached with a switch to detect the closing state of the door, and when the door is opened, the equipment can not run, so that the manual work is prevented from being accidentally injured by machinery during debugging. In addition, the lower side surface of the outer cover is also provided with a shutter and a fan to provide a heat dissipation function; the outer cover is also provided with an interface board for connecting a power supply and transmitting data. It should be understood that the door on the housing may be provided in various forms, and the louvers and fans on the housing are only one of the heat dissipation means, and other heat dissipation means are not necessarily described.

Referring to fig. 1, 3 and 4, in some embodiments, the material displacement table 3 is slidably mounted with a material placement assembly 30 that carries the image sensor to be measured. In one embodiment, the material displacement table 3 comprises a first servomotor 31 connected to the control device and a first linear stage 32 connected to the first servomotor 31, the first servomotor 31 being capable of driving the first linear stage 32 under the control of the control device. The material placing component 30 is slidably mounted on the first linear platform 32, so that it can move along the first linear platform 32 to the testing position of each testing component to be tested under the driving of the first servo motor 31 along the first linear platform 32.

Referring to fig. 4, the material placing assembly 30 includes a first slider 300 mounted on the linear platform 32, a translation sliding table 301 stacked on an upper end surface of the first slider 300, a first angle adjustment sliding table (not numbered), a lifting sliding table 303, and a material placing plate 304 for placing an image sensor. Wherein, micrometer 305 is installed to one side of translation slip table 301, through rotating the micrometer, can make translation slip table 301 remove about on first slider 300 to it places the board (drives the image sensor that awaits measuring promptly) and removes towards the equidirectional removal to drive the material. Assuming that the extending direction of the linear platform is the longitudinal axis direction, the direction perpendicular to the extending direction is the transverse axis direction, the first angle adjusting sliding table comprises a first transverse axis angle adjusting table 306 and a first longitudinal axis angle adjusting table 307, one side surfaces of the first transverse axis angle adjusting table 306 and the first longitudinal axis angle adjusting table 307 are respectively provided with a micrometer 305, and when the corresponding micrometer 305 is rotated, the first transverse axis angle adjusting table 306 and the first longitudinal axis angle adjusting table 307 can respectively drive the material placing plate 304 to incline left and right along the transverse axis direction and the longitudinal axis direction. For example, when the micrometer 305 on the first transverse-axis angle adjustment stage 306 is rotated, the first transverse-axis angle adjustment stage 306 can be made to slide along an arc trajectory; when first cross axle angle adjustment platform 306 slides along the pitch arc anticlockwise, can drive the material and place board 304 and incline to the left along the cross axle direction, and when first cross axle angle adjustment platform 306 slides along the pitch arc clockwise, can drive the material and place board 304 and incline to the right along the cross axle direction. Similarly, install micrometer 305 on the side of lift slip table 303, when rotating micrometer 305, adjustable lift slip table 303's height to drive the material and place board 304 and rise or descend, for example when clockwise rotation micrometer 305, lift slip table 303 will rise, otherwise then can descend. Through setting up translation slip table 301, first angle regulation slip table and lift slip table 303, can place the angle and highly adjusting that board 304 is located to the material to can change image sensor and backlight screen, integrating sphere, calibration plate's relative position and height, with promotion measuring accuracy.

In one embodiment, the material placement board 304 is mounted with a material fixture (not shown) for loading an image sensor under test and a confidence box 308 for powering the image sensor under test in the material fixture. It should be understood that the confidence box 308 is electrically connected to the control device and the image sensor to be tested to provide power to the image sensor to be tested; in the embodiment of the present invention, the confidence box 308 is connected to the control device and the image sensor to be measured through wires, and a first drag chain (not numbered) is disposed on the linear sliding table (not numbered) for arranging the wires, so that the wires are prevented from moving and winding when the linear sliding table slides along with the first sliding block 300.

Referring to fig. 1 and 3, in one embodiment, the backlight screen testing assembly 4 is disposed at one side of the material displacement table 3, and includes a vertical slide rail 40 extending in a vertical direction, and a backlight screen placing assembly (not numbered) slidably mounted on the vertical slide rail 40 for receiving the backlight screen. Wherein, the vertical slide rail 40 comprises a second servo motor (not numbered) connected with the control device and a second linear sliding table (not numbered) connected with the second servo motor; thereby second servo motor drives the straight line slip table of second under controlling means's control and drives the backlight screen and place the subassembly (drive the backlight screen promptly) and go up and down along vertical direction. Because the backlight screen can slide up and down along the vertical slide rail on the corresponding backlight screen placing component, the up-and-down movement of the backlight screen can be accurately controlled through the control device according to actual needs, so that the distance between the backlight screen and the image sensor to be measured can be adjusted. It should be understood that the second servo motor is connected with the control device through an electric wire, when the second servo motor drives the second linear sliding table to drive the backlight screen placing assembly to move up and down, the electric wire correspondingly moves, in order to avoid the electric wire from moving and winding, the second linear sliding table is provided with a second drag chain 41 for arranging the electric wire, and therefore the problem of winding of the electric wire is solved. In one embodiment, the backlight screen testing assembly 4 further comprises a first supporting frame 42 vertically installed on the upper end surface of the lower rack, and the first supporting frame 42 is connected with the vertical sliding rail 40 for fixing and balancing the vertical sliding rail 40.

Referring to fig. 1 and 3, the backlight screen placing assembly includes a second slider (not numbered) mounted on the vertical slide rail, a backlight screen placing frame groove 43, and a first connecting member (not numbered) connecting the second slider and the backlight screen placing frame groove 43. Wherein, the backlight screen placing frame groove 43 is used for embedding the backlight screen; the first connecting piece comprises a vertical fixing part (not numbered) and a baffle 44, the vertical fixing part is arranged on the second sliding block and is provided with a sliding groove (not shown); the baffle 44 comprises a transverse extending part (not numbered) and a vertical bending part (not numbered), wherein one end of the transverse extending part is accommodated in the chute, and the other end far away from the vertical fixing part transversely extends to the upper part of the material displacement table and then is vertically bent downwards to form the bending part; the backlight screen placement frame groove 43 is horizontally installed on the bent portion to be parallel to the material displacement table 3.

In one embodiment, the vertical fixation further comprises a bolt assembly (not numbered); the bolt assembly includes a bolt (not shown) and a nut (not shown), wherein the bolt penetrates through the baffle 44, the nut fixes the baffle 44 on the vertical fixing portion, and the diameter of the nut should be larger than the width of the sliding chute, the width of the sliding chute is slightly larger than the thickness of the baffle 44, so that the baffle 44 can slide up and down in the sliding chute along the vertical direction, thereby changing the distance between the backlight screen and the material placing plate 304. Further, after the second slider carries the backlight screen to move to the distance with certain allowance on the surface of the material placing plate 304 (image sensor to be detected) through the vertical slide rail, the distance of the baffle 44 moving up and down in the chute can be adjusted through the adjusting bolt assembly, so that the distance between the backlight screen and the image sensor to be detected can be further accurately fine-adjusted to reach an ideal state, and further the detection precision is improved.

When the image sensor to be tested moves to the testing position of the backlight screen testing component under the driving of the material displacement table 3, the material to be tested is started to photograph the backlight screen, the photographed image is transmitted to the control device, and the control device analyzes and processes the received image so as to detect parameters such as dark current, shot noise, dark current noise, reading noise, well filling and the like in the image sensor. It should be noted that any algorithm and the like suitable for detecting the above parameters can be applied to the present application, and are not described herein again.

Referring to fig. 1, in one embodiment, the integrating sphere testing assembly 5 is disposed on the same side of the backlight screen testing assembly 4 as the material displacement table 3, and includes a height adjusting plate 50 extending in a vertical direction and an integrating sphere placing assembly (not numbered) mounted on the height adjusting plate 50 for accommodating an integrating sphere 51. The integrating sphere placing assembly comprises a supporting block 52 detachably mounted on the height adjusting plate 50, a second angle adjusting sliding table 53 stacked on the upper end surface of the supporting block 52, an integrating sphere mounting plate 54 and a second connecting piece 55; wherein, the integrating sphere device with the built-in integrating sphere is horizontally installed on the second connecting piece 55 in a suspended manner so that the light outlet of the integrating sphere 51 is aligned with the material placing plate 304. In one embodiment, integrating sphere testing assembly 5 further includes a second support frame (not shown) vertically installed on the upper end surface of the lower frame, and the second support frame is connected with height adjustment plate 50 for fixing balance height adjustment plate 50.

In one embodiment, one surface of the height adjustment plate 50 for mounting the support block 52 is provided with a plurality of mounting holes (not shown), and when the height of the integrating sphere needs to be adjusted, the support block 52 can be detached from the height adjustment plate 50 and moved to the mounting hole corresponding to the required height; specifically, a scale (not shown) and a pointer (not shown) are disposed on one side surface of the height adjusting plate 50, and the height of the supporting block can be read through the scale and the pointer, so that the requirement of the integrating sphere for detecting the image sensor to be detected at each height can be met.

Referring to fig. 5, in an embodiment, the second angle adjustment sliding table 53 includes a second horizontal axis angle adjustment table 520 and a second vertical axis angle adjustment table 521 (assuming that the direction in which the linear platform extends is the vertical axis direction, and the direction perpendicular thereto is the horizontal axis direction), and micrometers are respectively installed on one side surfaces of the second horizontal axis angle adjustment table 520 and the second vertical axis angle adjustment table 521, and when the corresponding micrometers are rotated, the second horizontal axis angle adjustment table 520 and the second vertical axis angle adjustment table 521 can respectively drive the integrating sphere mounting plate (integrating sphere) to tilt left and right along the horizontal axis direction and the vertical axis direction. For example, when the micrometer on the second transverse-axis angle adjustment stage 520 is rotated, the second transverse-axis angle adjustment stage 520 can be made to slide along an arc trajectory; when second cross axle angle adjustment platform 520 slides along the pitch arc anticlockwise, can drive the integrating sphere mounting panel along the horizontal axis direction to the left slope, and when second cross axle angle adjustment platform 520 slides along the pitch arc clockwise, can drive the integrating sphere mounting panel along the horizontal axis direction to the right slope, and then makes the integrating sphere can follow the horizontal axis direction and incline about. The relative position and the angle of the integrating sphere relative to the image sensor can be changed by arranging the second angle adjusting table, so that the testing precision is improved.

In one embodiment, the integrating sphere testing assembly 5 further comprises a camera 56, wherein the camera 56 is disposed parallel to the integrating sphere and has an optical axis facing the image sensor to be tested, and is used for collecting an image of the image sensor to be tested and transmitting the image to the display. When the image is positioned in the center of the display screen, judging that the integrating sphere is aligned with the image sensor to be detected; if not, the second angle adjusting platform can be adjusted to change the angle of the integrating sphere relative to the image sensor until the ideal state is reached.

After the integrating sphere 51 is aligned with the image sensor to be measured, the light source enters the integrating sphere 51 through the light inlet of the integrating sphere 51, monochromatic uniform light exits through the light outlet of the integrating sphere 51, the image sensor to be measured receives the monochromatic uniform light, collected light energy data is transmitted to the control device, and the control device performs analysis processing to obtain the quantum efficiency of the sensor to be measured. Wherein, the control device is provided with corresponding test analysis software.

Referring to fig. 1, 2, 5 and 6, in one embodiment, the calibration plate testing assembly 6 is disposed at an end of the material displacement table 3 away from the backlight screen testing assembly 4 and the integrating sphere testing assembly 5, and includes a supporting frame 60 and a sliding frame 61 mounted on the supporting frame 60 and accommodating the calibration plate. Wherein, the supporting frame 60 comprises a base 600, a top plate 601, and a plurality of guiding shafts 602 connecting the base 600 and the top plate 601; the slide frame 61 is mounted on the frame 60. The calibration plate testing assembly 6 further comprises ball screws 603 which are symmetrically and fixedly arranged on the bases 600 on the two sides respectively and are parallel to the guide shaft 602, and the ball screws 603 penetrate through the sliding frame 61 and the top plate 601 and then are fixed on the top plate 601; and at least one driving member (not numbered) disposed on the base 600 and connected to the ball screw 603 to drive the ball screw 603 to rotate and further drive the sliding frame 61 to move up and down along the guiding shaft 602 on the frame 60. So, can change the distance between calibration board and the material that awaits measuring through sliding frame 61's lift to can mark in the distance department of difference, improve the precision of demarcation, can satisfy the demarcation demand of different distance departments.

Referring to fig. 7, in one embodiment, the driving part is a hand wheel 604, a first synchronizing wheel (not numbered) is mounted at one end of the hand wheel 604 close to the base 600, correspondingly, a first synchronizing wheel (not numbered) which is matched with the first synchronizing wheel is sleeved at one end of the ball screw 603 close to the base 600, a first synchronizing belt 605 is sleeved between the two synchronizing wheels, the hand wheel 604 and the ball screw 603 perform motion transmission through the first synchronizing belt 605, when the hand wheel 604 is manually rotated, the ball screw 603 rotates synchronously, and the sliding frame 61 carries the calibration plate to move up and down along the guide shaft 602 under the thrust action of the ball screw 603. For example, when the hand wheel 604 is rotated clockwise, the ball screw 603 will drive the sliding frame 61 to rise, so as to pull the distance between the calibration plate and the image sensor to be measured, and when the hand wheel 604 is rotated counterclockwise, the ball screw 603 will drive the sliding frame 61 to fall, so as to reduce the distance between the calibration plate and the image sensor to be measured. In one embodiment, the handwheel may be replaced with a motor and communicatively coupled to the control device for rotation under the control of the control device.

In one embodiment, a second synchronizing wheel 606 is sleeved on one end of the ball screw 603 close to the top plate 601, correspondingly, a matching second synchronizing wheel (not numbered) is sleeved on one end of the ball screw 603 symmetrically fixed on the other side base 600 close to the top plate 601, a second synchronous belt 607 is sleeved between the two second synchronizing wheels, so that the second synchronous belt 607 on the top plate 601 can transmit the rotation of the ball screw 603 on one side to the ball screw 603 on the other side, and further the sliding frame 61 carries the calibration plate to stably lift and descend in a balanced manner according to the thrust on both sides.

In one embodiment, a rib (not numbered) is provided on one side of the sliding frame 61 to increase the rigidity of the calibration plate and prevent the bending deformation caused by the thrust of the ball screw 603. An elevating frame (not numbered) is arranged below the frame to avoid the ball screw 603 from colliding with the image sensor to be detected below when the height of the calibration plate is lowered too low, and in addition, the stroke of the ball screw can be shortened, so that the processing cost is reduced and the structural stability is improved.

The calibration plate (not numbered) has a calibration surface (not numbered) towards the one side of the image sensor to be measured, at the calibration position, the light-emitting optical axis of the image sensor to be measured is perpendicular to the corresponding calibration surface, when the image sensor to be measured moves to the position of the calibration plate testing component 6 under the driving of the material displacement table 3, the control device controls the image sensor to collect images of the calibration surface and transmit the shot images to the control device, and the control device analyzes and processes the received images to measure the modulation contrast. It should be understood that the calibration surface of the calibration plate should be as smooth and smooth as possible, and in order to make the reflectivity of the surface of the calibration plate higher and more uniform, the calibration surface is preferably white, and may be made of white matte paper.

In some embodiments, in order to avoid the influence of the ambient light on the calibration, it is preferable to coat the inner wall surface of the housing with a coating for reducing the light reflectivity, for example, a black material such as polyvinyl chloride on the inner wall surface, so as to reduce the reflectivity and make the reflectivity less than 1.5%.

The control device built in the lower chassis may implement all or part of the functions of the various components in the above embodiments by hardware, or may implement the functions by software programs. The control device comprises an electric controller, a light source controller, a computer and the like; wherein the electric controller can be used for controlling the rotation of the servo motor; the light source controller can be used for starting the laser light source and setting the brightness; alternatively, a program stored in the computer is used to control the implementation of all or part of the functions of the above-described respective components.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the present invention.

In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope of the invention as defined by the appended claims.

Claims

1. An image sensor testing apparatus, comprising:

a lower frame provided with an upper end surface and a control device inside;

2. The image sensor testing apparatus according to claim 1, wherein: the backlight screen testing component is arranged on one side of the material displacement table and comprises a vertical sliding rail extending in the vertical direction and a backlight screen placing component arranged on the vertical sliding rail and used for containing a backlight screen, wherein the vertical sliding rail and the backlight screen placing component are slidably mounted on the vertical sliding rail.

3. The image sensor testing apparatus according to claim 1, wherein: the integrating sphere testing assembly is arranged on one side of the material displacement table and comprises a height adjusting plate extending in the vertical direction and an integrating sphere placing assembly arranged on the height adjusting plate and used for containing an integrating sphere.

4. The image sensor testing apparatus according to claim 1, wherein: the calibration plate testing component is arranged at one end, far away from the backlight screen testing component and the integrating sphere testing component, of the material displacement table and comprises a supporting rack and a sliding frame which is arranged on the supporting rack and accommodates a calibration plate.

5. The image sensor testing apparatus according to claim 1, wherein: the device also comprises an outer cover and an interaction component arranged on the outer cover; the lower rack, the material displacement table, the backlight screen testing component, the integrating sphere testing component and the calibration plate testing component are all arranged in an inner cavity of the outer cover; the interaction assembly is connected with the control device and is controlled by the control device.

6. The image sensor testing apparatus according to claim 1, wherein: the material displacement table comprises a first servo motor and a first linear platform connected with the first servo motor; wherein the first servomotor is used for driving the first linear platform under the control of the control device; the material placing assembly is slidably mounted on the first linear platform, so that the material placing assembly is driven by the first servo motor to move to the test position of each test assembly along the first linear platform to be tested.

7. The image sensor testing apparatus of claim 6, wherein: the material placing assembly comprises a first sliding block erected on the first linear platform, and a translation sliding table, a first angle adjusting sliding table, a lifting sliding table and a material placing plate used for placing the image sensor, wherein the translation sliding table, the first angle adjusting sliding table and the lifting sliding table are arranged on the upper end surface of the first sliding block in a stacking mode.

8. The image sensor testing apparatus according to claim 2, wherein: the backlight screen placing assembly comprises a second sliding block erected on a vertical sliding rail, a backlight screen placing frame groove and a first connecting piece connected with the second sliding block and the backlight screen placing frame groove.

9. The image sensor testing apparatus of claim 3, wherein: the integrating sphere placing assembly comprises a supporting block detachably mounted on the height adjusting plate, a second angle adjusting sliding table stacked on the upper end face of the supporting block, an integrating sphere mounting plate and a second connecting piece.

10. The image sensor testing apparatus according to claim 4, wherein: the supporting frame comprises a base, a top plate and a guide shaft for connecting the base and the top plate; the calibration plate testing assembly further comprises ball screws which are symmetrically and fixedly arranged on the bases on the two sides respectively and are parallel to the guide shafts, and the ball screws penetrate through the sliding frame and the top plate and then are fixed on the top plate.