CN114001931A

CN114001931A - Testing device and testing method for imaging assembly

Info

Publication number: CN114001931A
Application number: CN202111290474.0A
Authority: CN
Inventors: 邵明天
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-11-02
Filing date: 2021-11-02
Publication date: 2022-02-01
Anticipated expiration: 2041-11-02
Also published as: CN114001931B

Abstract

The present disclosure relates to the field of electronic device technology, and in particular, to a testing apparatus and a testing method for an imaging assembly, wherein the testing apparatus for the imaging assembly includes: the optical assembly comprises a light source piece, a beam splitter, a dispersion lens and a spectrum sensor, wherein the light source piece is used for emitting detection light, the beam splitter is arranged on the light emitting side of the light source piece, the dispersion lens is arranged on the side, far away from the light source, of the beam splitter, and the beam splitter is configured to be capable of transmitting light close to one side of the light source piece and reflecting light close to one side of the dispersion lens; the testing clamp is arranged on one side, far away from the beam splitter, of the dispersion lens, the imaging assembly is provided with a reflecting surface, the reflecting surface can reflect the detection light focused on the reflecting surface to form first reflection light, the first reflection light irradiates the beam splitter, and the beam splitter reflects the first reflection light to form second reflection light.

Description

Testing device and testing method for imaging assembly

Technical Field

The disclosure relates to the technical field of testing, in particular to a testing device and a testing method for an imaging assembly.

Background

With the development and progress of the technology, people have higher and higher requirements on the imaging function of the electronic equipment. In order to meet the requirement, a motor is usually arranged in an imaging module of the electronic device, and the motor drives the camera to achieve the purpose of improving the imaging quality, for example, an automatic focusing motor may be arranged in the imaging module, and the camera is pushed by the automatic focusing motor to focus. Since the requirement for focusing accuracy is high during imaging, a device for testing the motor of the imaging assembly is needed.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The present disclosure provides a testing apparatus and a testing method for an imaging module, so as to test a motor in an imaging module.

According to an aspect of the present disclosure, there is provided a testing apparatus of an imaging assembly, the testing apparatus of the imaging assembly including:

an optical assembly including a light source unit, a beam splitter, a dispersion lens and a spectrum sensor, wherein the light source unit is configured to emit detection light, the beam splitter is disposed on a light exit side of the light source unit, the dispersion lens is disposed on a side of the beam splitter away from the light source, the beam splitter is configured to transmit light near a side of the light source unit and reflect light near a side of the dispersion lens, and the dispersion lens is configured to focus light with different wavelengths in the detection light at different positions on a side of the dispersion lens away from the beam splitter;

the testing fixture is arranged on one side, away from the beam splitter, of the dispersive lens and used for clamping the imaging assembly, the imaging assembly is provided with a reflecting surface, the reflecting surface can reflect the detection light focused on the reflecting surface to form first reflected light, the first reflected light irradiates the beam splitter, and the beam splitter reflects the first reflected light to form second reflected light; the spectrum sensor is used for receiving second reflected light, and the spectrum sensor is used for detecting the spectrum of the second reflected light.

According to another aspect of the present disclosure, a method of testing an imaging assembly, the imaging assembly including a camera and a motor, the camera and the motor being connected and the motor being for driving the camera, the method comprising:

providing a driving signal to the motor to drive the camera to move;

controlling a light source device to emit detection light, so that the detection light is irradiated to a reflecting surface of the camera through a beam splitter and a dispersion lens, the reflecting surface reflects light focused on the reflecting surface to a spectrum sensor through the dispersion lens and the beam splitter, and the dispersion lens is used for focusing light with different wavelengths in the detection light to different positions on one side of the dispersion lens away from the beam splitter;

and determining the actual position of the camera according to the spectral data acquired by the spectral sensor.

The testing device of imaging assembly that this disclosed embodiment provided, through light source spare transmission detection light, detection light is divided into the light of multiple colour and shines to the imaging assembly on the test fixture through beam splitter and dispersive lens, the plane of reflection on the motor reflects the light that focuses on the plane of reflection and forms first reverberation, first reverberation shines to the beam splitter along original light path, the first reverberation of beam splitter reflection forms the second reverberation, spectrum sensor receives the second reverberation, and the spectral data of response definite second reverberation, can confirm the position of plane of reflection according to this spectral data, thereby realize the test to motor performance in the imaging assembly.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.

Fig. 1 is a schematic structural diagram of a testing apparatus for a first imaging assembly according to an exemplary embodiment of the present disclosure;

FIG. 2 is a block diagram of an imaging assembly testing apparatus provided in an exemplary embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a first light source device according to an exemplary embodiment of the present disclosure;

fig. 4 is a schematic structural view of a second light source device provided in an exemplary embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a second testing apparatus for an imaging assembly according to an exemplary embodiment of the present disclosure;

FIG. 6 is a spectrum diagram of a spectrum sensor provided by an exemplary embodiment of the present disclosure;

FIG. 7 is a flowchart of a first method for testing an imaging assembly according to an exemplary embodiment of the present disclosure;

FIG. 8 is a schematic view of a state of an imaging assembly provided by an exemplary embodiment of the present disclosure;

FIG. 9 is a flowchart of a second method of testing an imaging assembly provided by an exemplary embodiment of the present disclosure;

FIG. 10 is a flowchart of a third method of testing an imaging assembly provided by an exemplary embodiment of the present disclosure;

fig. 11 is a flowchart of a testing method for a fourth imaging assembly according to an exemplary embodiment of the disclosure.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

Although relative terms, such as "upper" and "lower," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.

An imaging module is installed in an electronic device (such as a mobile phone, a tablet computer, a wearable device, and the like), and the imaging module is used for acquiring image data. The imaging assembly can include camera and motor, and camera and motor active cell are connected, and the motion of motor drive camera. Among them, the motor may be used for auto-focusing or optical anti-shake, etc.

The imaging assembly is used for imaging, so the precision requirement on the motor is high. The motor is tested, on one hand, whether the motor is qualified is tested, and on the other hand, the motor can be calibrated.

For example, a theoretical position of the camera can be determined according to the driving signal during the operation of the motor, an actual position of the camera is determined by using the testing device, the motor is considered to be qualified when the theoretical position and the actual position of the camera are consistent, and the motor is considered to be unqualified when the theoretical position and the actual position of the camera are not consistent.

The motor also can receive the influence of factors such as self gravity and camera gravity in the use, leads to controlling the problem that has the error. In the testing process, the driving signals and the positions of the corresponding cameras can be recorded when the imaging components are in different forms, so that the motor is calibrated, and the motor is controlled conveniently.

An exemplary embodiment of the present disclosure first provides a testing apparatus of an imaging module, as shown in fig. 1, the testing apparatus of an imaging module including: an optical assembly 10 and a test fixture 20. The optical assembly 10 includes a light source element 110, a beam splitter 120, a dispersive lens 130, and a spectrum sensor 140, the light source element 110 being for emitting probe light; the beam splitter 120 is disposed on the light-emitting side of the light source device 110, the dispersion lens 130 is disposed on a side of the beam splitter 120 away from the light source, the beam splitter 120 is configured to transmit light near the light source device 110 and reflect light near the dispersion lens 130, and the dispersion lens 130 is configured to focus light of different wavelengths in the probe light at different positions on the side of the dispersion lens 130 away from the beam splitter 120. The testing fixture 20 is disposed on a side of the dispersive lens 130 away from the beam splitter 120, the testing fixture 20 is configured to clamp the imaging assembly 30, the imaging assembly 30 has a reflection surface, the reflection surface can reflect the probe light focused on the reflection surface to form a first reflected light, the first reflected light irradiates the beam splitter 120, and the beam splitter 120 reflects the first reflected light to form a second reflected light; the spectrum sensor 140 is used for receiving the second reflected light, and the spectrum sensor 140 is used for detecting the spectrum of the second reflected light.

According to the testing device of the imaging assembly provided by the embodiment of the disclosure, the light source device 110 emits the detection light, the detection light is divided into light of multiple colors through the beam splitter 120 and the dispersion lens 130 and irradiates onto the imaging assembly 30 on the testing fixture 20, the reflection surface on the motor 31 reflects the light focused on the reflection surface to form first reflection light, the first reflection light irradiates onto the beam splitter 120 along the original light path, the beam splitter 120 reflects the first reflection light to form second reflection light, the spectrum sensor 140 receives the second reflection light and determines the spectrum data of the second reflection light in an induction manner, and the position of the reflection surface can be determined according to the spectrum data, so that the performance of the motor 31 in the imaging assembly 30 can be tested.

Further, the testing apparatus for an imaging assembly provided by the embodiment of the present disclosure may further include a bracket 40 and a rotating arm 50, where the bracket 40 is used to form a main body of the testing apparatus for an imaging assembly. The rotating arm 50 is rotatably connected to the bracket 40, the optical assembly 10 and the test fixture 20 are connected to the rotating arm 50, and different postures of the electronic device in use can be simulated by rotating the rotating arm 50, so that different use postures of the imaging assembly 30 can be tested.

The optical assembly 10 and the rotary arm 50 may be connected in a sliding manner, and the optical assembly 10 can move in a direction perpendicular to the optical axis of the probe light, so as to scan the entire reflection surface of the camera 32 with the probe light.

Further, as shown in fig. 2, the testing apparatus for an imaging component provided in the embodiment of the present disclosure may further include a control module 80, where the control module 80 is connected to the spectrum sensor 140, and is configured to determine the posture of the imaging component 30 according to the spectrum data detected by the spectrum sensor 140. Thereby realizing the performance test of the motor 31.

The following will describe portions of the testing apparatus for an imaging component provided in the embodiments of the present disclosure in detail:

the stand 40 is used to form a main body of a test apparatus forming an image forming assembly, and the stand 40 may include a base 41 and a connecting portion 42, the base 41 being connected to the connecting portion 42, the base 41 being used to support the entire test apparatus, and the connecting portion 42 being used to connect the rotation arm 50.

The rotating arm 50 is rotatably connected to the connecting portion 42, wherein a driving motor may be disposed on the connecting portion 42, the driving motor is connected to the rotating arm 50, and the rotating arm 50 is driven to rotate relative to the bracket 40 by the driving motor. The driving motor is connected with the control module 80, a driving signal is provided to the driving motor through the control module 80, and the control module 80 controls the rotating arm 50 to rotate by a preset angle. When the rotary arm 50 stops at the preset position, the control module 80 controls the spectrum sensor 140 to detect the spectrum data of the second reflected light.

For example, the driving motor may be a servo motor or a stepping motor. When the driving motor is a servo motor, the driving motor may include a motor and a servo driver, the motor is connected to the connecting portion 42, an output shaft of the motor is connected to the rotating arm 50, the servo driver is connected to the control module 80, and the servo driver drives the motor according to a signal output by the control module 80. When the driving motor is a stepping motor, the driving motor may include a motor and a stepping driver, the motor is connected to the connecting portion 42, an output shaft of the motor is connected to the rotating arm 50, the stepping driver is connected to the control module 80, and the stepping driver drives the motor according to a signal output from the control module 80.

Alternatively, the rotating arm 50 may be rotatably connected to the connecting portion 42, and the relative positional relationship between the rotating arm 50 and the connecting portion 42 may be adjusted by manual rotation. For example, a damping member may be disposed on the connection portion 42, and the damping member is configured to enable relative rotation between the rotation arm 50 and the connection portion 42 when a force applied to the rotation arm 50 is greater than a preset threshold value.

Wherein a scale value configured to be 0-360 degrees along a circumference may be provided on the rotating portion. The angle of rotation of the rotating arm 50 with respect to the connecting portion 42 can be determined by the scale value on the connecting portion 42. Thereby enabling determination of the pose of the imaging assembly 30 and determining the effect of the pose of the imaging assembly 30 on the output of the motor 31.

The optical assembly 10 and the test fixture 20 are connected to a rotary arm 50, respectively. The optical assembly 10 and the rotary arm 50 may be a sliding connection, and the optical assembly 10 may slide in a direction perpendicular to the optical axis of the probe light. For example, in a cartesian coordinate system, the optical axis of the probe light is along the Z direction, and the optical assembly 10 can slide in the X direction and the Y direction.

The testing device for the imaging assembly provided by the embodiment of the disclosure may further include a connecting plate 60, the connecting plate 60 is connected to the bracket 40, and the connecting plate 60 and the testing fixture 20 are oppositely disposed along the direction of the measuring light path, and the optical assembly 10 is slidably connected to a side of the connecting plate 60 facing the testing fixture 20.

Wherein, the connecting board 60 is connected with one end of the rotating arm 50, and the connecting board 60 is opposite to the testing fixture 20, the optical component 10 is arranged on one side of the connecting board 60 facing to the testing fixture 20, the imaging component 30 to be tested is clamped on the testing fixture 20, and the reflecting surface is opposite to the optical component 10. The connecting plate 60 is provided with a slide rail to which the optical assembly 10 is connected.

Illustratively, the connecting plate 60 may include a first plate connected to the rotary arm 50 and a second plate connected to the first plate, the second plate being capable of sliding in the X direction with respect to the first plate, and the optical module 10 being connected to the second plate, the second plate having a slide rail provided thereon in the Y direction along which the optical module 10 is capable of moving.

The test fixture 20 is connected to the rotating arm 50, and the test fixture 20 is provided with a receiving portion for placing the imaging assembly 30 to be tested. An adjustment mechanism may be provided on the test fixture 20 for adjusting the receiving portion to enable the test fixture 20 to be adapted for testing of different sizes of imaging assemblies 30.

In order to meet the requirement that the optical path of the optical assembly 10 is a pre-calibrated optical path in use, the reflecting surface of the imaging assembly 30 needs to be set to a preset initial position. The position of the optical assembly 10 on the test fixture 20 may be adjusted by an adjustment mechanism.

For example, the test fixture 20 may include a fixture body having a recess for placing the imaging assembly 30 and an adjustment bolt (not shown). The bottom of the recessed portion may be provided with a threaded hole, to which an adjusting bolt is connected. The imaging assembly 30 can be pushed to move by rotating the adjusting bolt, so that the initial position of the reflecting surface can be calibrated.

The light source 110 is used to emit a detection light, and in the embodiment of the present disclosure, the light source 110 may be a linear light source, and the linear light source can emit a linear detection light, and the linear detection light can form a linear light spot on the surface of the detected object. Of course, the light source 110 may be a point light source in practical applications, and the embodiment of the disclosure is not limited thereto.

In a possible embodiment of the present disclosure, as shown in fig. 3, the light source device 110 includes: a point light source 111, a first collimating lens 112, a first converging lens 113, and a first linear diaphragm 114; the first collimating lens 112 is disposed on the light emitting side of the point light source 111, and the first collimating lens 112 is configured to convert the light emitted from the point light source 111 into parallel light; the first converging lens 113 is disposed on a side of the first collimating lens 112 away from the point light source 111, and the first converging lens 113 is configured to converge the parallel light rays to form linear light; the first linear diaphragm 114 is disposed on a side of the first converging lens 113 away from the first collimating lens 112, and the first linear diaphragm 114 is configured to filter stray light in the linear light and output linear probe light.

The point light source 111 can generate a divergent light, and the point light source 111 may be a light emitting element such as an LED lamp or a halogen lamp. The light emitted from the point light source 111 is visible light, and the wavelength of the light emitted from the electric light source may be 400 nm to 700 nm.

The first collimating lens 112 is disposed on the light emitting side of the point light source 111, the collimating lens is an optical device, and the first collimating lens 112 is configured to align the light beam emitted by the point light source 111 with the light emitting direction to form a collimated light beam or a parallel light beam. Thereby preventing or at least minimizing the spread of the light beam with distance. The first collimating lens 112 may include one or more lenses, and the collimating lens may include various lens combinations such as a concave lens, a convex lens, a plane mirror, and the like.

The first converging lens 113 is disposed on a side of the first collimating lens 112 away from the point light source 111, and the first converging lens 113 is configured to converge the light transmitted by the collimating lens into linear light. The first converging lens 113 may be a cylindrical lens having a power meridian through which the vergence of the light rays changes after the probe light passes. The detection light is converged into linear detection light after passing through the cylindrical lens. In practical applications, the first converging lens 113 may also be formed by combining a plurality of lenses, for example, the first converging lens 113 may include a plurality of lens combinations such as a cylindrical lens, a concave lens, a convex lens, and a plane mirror.

The first linear diaphragm 114 is disposed on a side of the converging lens away from the collimating lens, and the first linear diaphragm 114 is used for filtering stray light in the probe light. The first linear diaphragm 114 may include a diaphragm body having a linear aperture formed therein to form a diaphragm. The light emitted from the point light source 111 passes through the first collimating lens 112, the first converging lens 113 and the first linear aperture 114 to form linear detection light.

In another possible embodiment of the present disclosure, as shown in fig. 4, the light source device 110 may include: a linear light source 115, a second collimating lens 116, a second converging lens 117, and a second linear diaphragm 118; the second collimating lens 116 is disposed on the light emitting side of the linear light source 115, and is configured to collimate the light of the linear light source 115 to output parallel light; the second converging lens 117 is arranged on one side of the second collimating lens 116 far away from the linear light source 115, and the second converging lens 117 is used for converging parallel light rays to form linear light; the second linear diaphragm 118 is disposed on a side of the second converging lens 117 away from the second collimating lens 116, and the second linear diaphragm 118 is configured to filter stray light in the linear light and output linear probe light.

The linear light source 115 can generate linear light, and the linear light source 115 can be a light emitting element such as an LED lamp or a halogen lamp. The light emitted from the linear light source 115 is visible light, and the wavelength of the light emitted from the linear light source 115 may be 400 nm to 700 nm.

The second collimating lens 116 is disposed on the light emitting side of the line light source 115, and the second collimating lens 116 is used for aligning the light beam emitted from the point light source 111 with the light emitting direction to form a collimated light beam or a parallel light beam. Thereby preventing or at least minimizing the spread of the light beam with distance. Wherein the second collimating lens 116 may be a cylindrical collimating lens. Or the second collimating lens 116 may include one or more lenses, and the collimating lens may include various lens combinations such as a concave lens, a convex lens, a plane mirror, and the like.

The second converging lens 117 is disposed on a side of the collimating lens away from the point light source 111, and the second converging lens 117 is configured to converge the light transmitted by the collimating lens into linear light. The second converging lens 117 may be a cylindrical converging lens having a refractive power meridian through which the vergence of the light rays changes after the probe light passes. The detection light is converged into linear detection light after passing through the cylindrical converging lens. In practical applications, the converging lens may also be formed by combining a plurality of lenses, for example, the second converging lens 117 may include a plurality of lens combinations such as a cylindrical lens, a concave lens, a convex lens, and a plane mirror.

The second linear diaphragm 118 is disposed on a side of the second converging lens 117 away from the second collimating lens 116, and the second linear diaphragm 118 is used for filtering stray light in the probe light. The second linear diaphragm 118 may include a diaphragm body having a linear aperture formed therein to form a diaphragm. The light emitted from the linear light source 115 passes through the second collimating lens 116, the second converging lens 117 and the second linear aperture 118 to form linear probe light.

The beam splitter 120 is disposed on the light emitting side of the light source 110, the beam splitter 120 is configured to transmit light from the first side and reflect light from the second side, and the side of the beam splitter 120 close to the light source is the first side.

Wherein the optical axes of the beam splitter 120 and the detection light intersect, and the optical axes of the beam splitter 120 and the detection light are not perpendicular. The detection light output from the light source 110 can enter the dispersing lens 130 through the beam splitter 120, and the beam splitter 120 can reflect the light reflected by the imaging assembly 30 when the light is irradiated to the beam splitter 120.

The beam splitter 120 may be a single-sided see-through mirror having a reflective surface and a transmissive surface, the transmissive surface of the single-sided see-through mirror facing the light source element 110, and the reflective surface of the single-sided see-through mirror facing the dispersive lens 130. And the reflecting surface of the single-sided perspective mirror is not vertical to the optical axis of the detection light. The light emitted from the light source 110 is irradiated to the dispersion lens 130 through the single-sided see-through lens, the light reflected from the imaging assembly 30 is irradiated to the reflective surface of the single-sided see-through lens 130, and the reflective surface of the single-sided see-through lens reflects the light to the spectrum sensor 140.

For example, the perspective surface and the reflection surface of the beam splitter 120 are disposed in parallel, and the angle between the beam splitter 120 and the optical axis of the probe light may be 45 degrees. The light reflected by the reflecting surface of the beam splitter 120 is transmitted to the side of the light source device 110, and the spectrum sensor 140 is provided to the side of the light source device 110.

The dispersing lens 130 is disposed on a side of the beam splitter 120 away from the light source, and the dispersing lens 130 is used to focus the probe light with different wavelengths to different positions on the side of the dispersing lens 130 away from the beam splitter 120.

The dispersion is a phenomenon in which the complex color light is decomposed into monochromatic light to form a spectrum, that is, the dispersion lens 130 can decompose the complex color detection light into a plurality of monochromatic lights of different colors. And the chromatic dispersion lens 130 has a different focal point for light of different colors (wavelengths). After the probe light passes through the dispersion lens 130, the focal point of the light with different wavelengths is different from the dispersion lens 130. For example, light having a wavelength of 700 nm is focused at a first location, light having a wavelength of 550 nm is focused at a second location, and light having a wavelength of 400 nm is focused at a third location.

It should be noted that in the embodiment of the present disclosure, the light transmittance of each light-transmitting element is configured to be greater than 90% to ensure the intensity of the detection light finally reflected to the spectrum sensor 140.

Further, the light source assembly provided by the embodiment of the present disclosure may further include a package housing, an accommodating cavity is disposed inside the package housing, and the light source device 110, the beam splitter 120, the dispersive lens 130 and the spectrum sensor 140 are disposed in the accommodating cavity.

The light source 110, the beam splitter 120, and the dispersing lens 130 are sequentially disposed in the accommodating cavity along the optical axis. The spectrum sensor 140 may be disposed on a sidewall of the accommodating chamber, and the spectrum sensor 140 is located on an optical path of the second reflected light.

The imaging assembly 30 comprises a motor 31 and a camera head 32, the camera head 32 is connected with the motor 31, the motor 31 is used for driving the camera head 32, and the reflecting surface is positioned on the side of the camera head 32 far away from the motor 31. When the electronic device images, the motor 31 drives the camera 32 to move, and functions such as automatic focusing and anti-shake are realized. The camera 32 is a rigid device, and therefore, the performance of the motor 31 can be detected by detecting the position of the lens surface (i.e., the reflection surface) of the camera 32 driven by the motor 31.

In order to improve the reflectivity of the reflecting surface, as shown in fig. 5, the testing apparatus of the imaging assembly may further include a reflecting mirror 70, the reflecting mirror 70 is disposed on a side of the camera 32 facing the connecting plate 60, and the reflecting mirror 70 forms the reflecting surface.

The control module 80 is coupled to the spectral sensor 140 for determining the pose of the imaging assembly 30 based on the spectral data detected by the spectral sensor 140.

The control module 80 has a wavelength-focus mapping relationship, which includes a mapping relationship between the focus of the dispersive lens 130 and the wavelength of the detection light. The wavelength-focus mapping may be determined by calibration. The wavelength-focus mapping may be stored in the control module 80 in the form of a table or a function.

The working principle of the testing device of the imaging assembly provided by the embodiment of the disclosure is as follows:

the light source assembly emits detection light, the detection light irradiates to the dispersion lens 130 through the beam splitter 120, the dispersion lens 130 disperses the detection light into light beams with a plurality of colors, and the light beams with the plurality of colors are focused on different positions on one side of the dispersion lens 130 away from the beam splitter 120 after passing through the dispersion lens 130. When the reflection surface of the imaging component 30 is located at the focus of a certain color of light, the color of light is reflected to form a first reflection light, the first reflection light is reflected to the reflection surface of the beam splitter 120 along the original optical path, the reflection surface of the beam splitter 120 reflects the first reflection light to form a second reflection light, the second reflection light is irradiated to the spectrum sensor 140, and the spectrum of the second reflection light is determined by the reflection light sensed by the spectrum sensor 140. The wavelength of the second reflected light, i.e., the wavelength of the light focused on the reflective surface of the imaging assembly 30, is determined from the spectrum of the second reflected light. The control module 80 stores a wavelength-focus mapping relationship, and determines a position of a focus according to the wavelength-focus mapping relationship, where the position of the focus is a position of a reflecting surface of the camera 32, that is, a position of the camera 32 driven by the motor 31.

It should be noted that, in a single test in practical applications, ambient light or light of other wavelengths reflected by the mirror 70 is also detected by the spectrum sensor 140, but the spectrum intensity of the light focused on the reflection surface is the largest in the spectrum detection result. Therefore, as shown in fig. 6, the wavelength corresponding to the point in the spectrogram at which the peak of the spectral intensity is the largest is the wavelength of the light focused on the reflection surface. The peak wavelength point and the test distance can be in one-to-one correspondence by calibrating the test device in the early stage. Therefore, the control module 80 can calculate the distance between the object to be tested and the testing device after acquiring the spectrum data.

The probe light is a linear probe light, and when the motor 31 is used for auto-focusing, the motor 31 drives the camera 32 to move away from the test fixture 20 or to move close to the test fixture 20, and the wavelength of the light focused on the mirror 70 of the camera 32 is different.

When the motor 31 is used to detect the performance of the anti-shake motor 31, the camera 32 may move on the test fixture 20 in a translational manner, and the position of the camera 32 cannot be determined by the linear detection light at one time. At this time, the linear detection light may traverse the reflective surface of the camera 32 in a scanning manner, and the position of the camera 32 may be determined according to the spectral data detected by the spectral sensor 140 and the relative position relationship between the optical assembly 10 and the bracket 40, so as to test the anti-shake motor 31.

During testing, the rotating arm 50 may be rotated so that the imaging assembly 30 is in different postures, and the motor 31 in the imaging assembly 30 is tested. For example, the motor 31 may be tested when the included angles between the rotating arm 50 and the connecting portion 42 are 0 degree, 45 degrees, 90 degrees, 135 degrees, and 180 degrees, respectively.

During testing, it is necessary to provide a drive signal to the motor 31 in the imaging assembly 30, and in order to provide a drive signal to the motor 31, an electrical connection 42 may be provided on the test fixture 20. The electrical connection portion 42 is used to electrically connect the motor 31 and provide a driving signal to the motor 31. The electrical connection 42 may be a pad or a power interface, etc.

The testing device of the imaging assembly provided by the embodiment of the disclosure can detect the positions of the camera 32 and the motor 31 when the reflecting surface of the camera 32 is perpendicular to the optical axis of the detection light. The positions of the camera 32 and the motor 31 can be detected when the reflecting surface and the optical axis of the camera 32 are not vertical, and the height difference of different positions of the reflecting surface can be determined by a scanning type detection mode, so that the position of the inclined camera 32 can be detected.

According to the testing device of the imaging assembly provided by the embodiment of the disclosure, the light source device 110 emits the detection light, the detection light is divided into light of multiple colors through the beam splitter 120 and the dispersion lens 130 and irradiates onto the imaging assembly 30 on the testing fixture 20, the reflection surface on the motor 31 reflects the light focused on the reflection surface to form first reflection light, the first reflection light irradiates onto the beam splitter 120 along the original light path, the beam splitter 120 reflects the first reflection light to form second reflection light, the spectrum sensor 140 receives the second reflection light and determines the spectrum data of the second reflection light in an induction manner, and the position of the reflection surface can be determined according to the spectrum data, so that the performance of the motor 31 in the imaging assembly 30 can be tested. The test device is miniaturized and convenient, and has the advantages of high accuracy, strong universality, wide application range and the like.

The exemplary embodiment of the present disclosure also provides a testing method of an imaging assembly, the imaging assembly includes a camera and a motor, the camera is connected with the motor, and the motor is used for driving the camera, as shown in fig. 7, the testing method of the imaging assembly may include the following steps:

step S710, providing a driving signal to a motor to drive the camera to move through the motor;

step S720, controlling the light source to emit the detection light, so that the detection light irradiates to the reflecting surface of the camera through the beam splitter and the dispersion lens, and the reflecting surface reflects the light focused on the reflecting surface to the spectrum sensor through the dispersion lens and the beam splitter, wherein the dispersion lens is used for focusing the light with different wavelengths in the detection light to different positions on one side of the dispersion lens, which is far away from the beam splitter;

and step S730, determining the actual position of the camera according to the spectrum data acquired by the spectrum sensor.

The testing method of the imaging assembly provided by the embodiment of the disclosure includes the steps that the light source component emits detection light, the detection light is divided into light with multiple colors through the beam splitter and the dispersion lens and irradiates the light to the imaging assembly on the testing clamp, the reflection surface on the motor reflects the light focused on the reflection surface to form first reflection light, the first reflection light irradiates the beam splitter along an original light path, the beam splitter reflects the first reflection light to form second reflection light, the spectrum sensor receives the second reflection light and determines the spectrum data of the second reflection light in an induction mode, the position of the reflection surface can be determined according to the spectrum data, and therefore the performance of the motor in the imaging assembly is tested.

Further, as shown in fig. 9, the method for testing an imaging assembly according to the embodiment of the present disclosure further includes the following steps:

step S740, determining the theoretical position of the camera under the current driving signal according to the driving signal;

and step S750, when the difference between the actual position and the theoretical position of the camera is smaller than a preset threshold value, determining that the imaging component is qualified.

The theoretical position of the camera at the current driving signal line is determined through the driving signal, the theoretical position and the actual position are compared, when the difference between the actual position and the theoretical position of the camera is smaller than a preset threshold value, the imaging assembly is determined to be qualified, and whether the motor is qualified or not is detected.

Further, as shown in fig. 10, the method for testing an imaging assembly according to the embodiment of the present disclosure further includes the following steps:

and S760, controlling the rotating arm to rotate so as to drive the test fixture, the imaging assembly and the optical assembly to rotate, so as to test the imaging assembly by the optical assembly under different postures, wherein the rotating arm is connected with the test fixture and the imaging assembly.

The test fixture, the imaging assembly and the optical assembly are driven to rotate through the rotating arm, various postures of the imaging assembly during use can be simulated, and the performance of the motor can be tested more comprehensively.

Further, when the motor drives the camera to translate, as shown in fig. 11, the method for testing the imaging assembly provided by the embodiment of the present disclosure further includes the following steps:

step S770, controlling the light source to move along a preset direction, so that the detected light scans the reflective surface to determine the spectral data of the detected light focused on the reflective surface.

The detection light traverses the reflecting surface of the camera in a scanning mode, and the position of the light source piece is recorded in the scanning process, so that the position of the reflecting surface of the camera can be determined, and the translation test of the motor-driven camera is realized.

The following will describe in detail the steps of the testing method of the imaging assembly provided by the embodiment of the present disclosure:

in step S710, a driving signal may be provided to the motor to drive the camera to move by the motor.

The imaging assembly is arranged on the test fixture during testing, and the reflecting surface of the imaging assembly can be adjusted to the initial position through the adjusting mechanism on the test fixture before testing. The test begins by providing a drive signal to the motor, which moves to a corresponding position in response to the drive signal.

For example, when the motor is an auto-focus motor, a driving signal may be output to the motor to move the motor according to a preset step length, and the motor drives the camera to move along the optical axis direction of the optical assembly, that is, the reflection surface is always perpendicular to the optical axis of the optical assembly. When the motor moves for one step length, the position of the camera is tested once by using the optical assembly.

When the motor is the anti-shake motor, can be to motor output drive signal, make the motor move according to predetermineeing the step length, the motor can drive the camera and learn the optical axis direction motion of subassembly along parallel and perpendicular to, also be under the anti-shake motor drive, the plane of reflection can be with the optical axis of optical assembly and be arbitrary contained angle. When the motor moves for one step length, the position of the camera is tested once by using the optical assembly. For example, as shown in fig. 8, the reflection surface of the camera and the optical axis of the optical component are not perpendicular, that is, the reflection surface is inclined with respect to the optical component.

During testing, it is necessary to provide drive signals to the motors in the imaging assemblies, and electrical connections may be provided on the test fixture in order to provide drive signals to the motors. The electric connection part is used for electrically connecting the motor and providing a driving signal for the motor. The electrical connection may be a pad or a power interface, etc.

The driving signal can be provided by a control module, and the control module can comprise a computer and a motor driver, wherein the motor driver is respectively connected with the computer and the motor, and the motor driver drives the motor to move under the control of the computer.

In step S720, the light source device may be controlled to emit the detection light, such that the detection light is irradiated to the reflection surface of the camera through the beam splitter and the dispersion lens, and the reflection surface reflects the light focused on the reflection surface to the spectrum sensor through the dispersion lens and the beam splitter, and the dispersion lens is configured to focus the light with different wavelengths in the detection light to different positions on a side of the dispersion lens away from the beam splitter.

The control module can be used for sending a trigger signal to the light source piece, and the light source piece emits detection light when receiving the trigger signal. The detection light is dispersed into light with multiple colors after passing through the beam splitter and the dispersion lens, and the light with multiple colors is focused on different positions on one side of the dispersion lens, which is far away from the light source component. When the reflecting surface of the camera is positioned at the focus of one color of light, the color of light is reflected to the beam splitter along the original optical path and is reflected to the spectrum sensor through the beam splitter.

The light source component is used for emitting detection light, and in the embodiment of the present disclosure, the light source component may be a linear light source component, and the linear light source component can emit linear detection light, and the linear detection light irradiates on the surface of the detected object to form a linear light spot. Of course, in practical applications, the light source device may also be a point light source, and the embodiments of the disclosure are not limited thereto.

The light source component is a linear light source component, and the detection light emitted by the linear light source component is linear detection light. In one possible embodiment of the present disclosure, a light source device includes: the device comprises a point light source, a first collimating lens, a first converging lens and a first linear diaphragm; the first collimating lens is arranged on the light emitting side of the point light source and used for converting light rays emitted by the point light source into parallel light rays; the first converging lens is arranged on one side of the first collimating lens, which is far away from the point light source, and is used for converging parallel light rays to form linear light; the first linear diaphragm is arranged on one side of the first converging lens, which is far away from the first collimating lens, and is used for filtering stray light in the linear light and outputting linear detection light. .

The point light source can generate divergent light, and the point light source can be a light emitting piece such as an LED lamp or a halogen lamp. The light emitted from the point light source is visible light, and the wavelength of the light emitted from the electric light source may be 400 nm to 700 nm.

The first collimating lens is arranged on the light emitting side of the point light source, the collimating lens is an optical device, and the collimating lens is used for aligning the light beam emitted by the point light source to the light ray emitting direction so as to form collimated light rays or parallel light rays. Thereby preventing or at least minimizing the spread of the light beam with distance. The collimating lens may include one or more lenses, and the collimating lens may include various lens combinations such as a concave lens, a convex lens, a plane mirror, and the like.

The first converging lens is arranged on one side, away from the point light source, of the first collimating lens and is used for converging light rays transmitted by the collimating lens into linear light rays. The first converging lens may be a cylindrical lens having a refractive power meridian through which the probe light passes and a vergence of the light changes. The detection light is converged into linear detection light after passing through the cylindrical lens. In practical applications, the converging lens may also be formed by combining a plurality of lenses, for example, the first converging lens may include a plurality of lens combinations such as a cylindrical lens, a concave lens, a convex lens, and a plane mirror.

The first linear diaphragm is arranged on one side, far away from the first collimating lens, of the converging lens and used for filtering stray light in the probe light. The first linear diaphragm may include a diaphragm body provided with a linear aperture forming a diaphragm. The light emitted by the point light source passes through the first collimating lens, the first converging lens and the first linear diaphragm to form linear detection light.

In another possible embodiment of the present disclosure, the light source device may include: the linear light source, the second collimating lens, the second converging lens and the second linear diaphragm; the second collimating lens is arranged on the light-emitting side of the linear light source and is used for collimating the light of the linear light source so as to output parallel light; the second converging lens is arranged on one side of the second collimating lens, which is far away from the linear light source, and is used for converging the parallel light rays to form linear light; the second linear diaphragm is arranged on one side of the second converging lens far away from the second collimating lens and used for filtering stray light in the linear light and outputting linear detection light.

The linear light source can generate linear light, and the linear light source can be a light emitting element such as an LED lamp or a halogen lamp. The light emitted from the linear light source is visible light, and the wavelength of the light emitted from the linear light source can be 400 nm to 700 nm.

The second collimating lens is arranged on the light emitting side of the line light source, the collimating lens is an optical device, and the second collimating lens is used for aligning the light beam emitted by the point light source to the light emitting direction so as to form collimated light or parallel light. Thereby preventing or at least minimizing the spread of the light beam with distance. Wherein the second collimating lens may be a cylindrical collimating lens. Or the second collimating lens comprises one or more lenses, and the second collimating lens can comprise various lens combinations such as a concave lens, a convex lens, a plane mirror and the like.

The second converging lens is arranged on one side, far away from the point light source, of the second collimating lens and is used for converging light rays transmitted by the collimating lens to form linear light. The second converging lens may be a cylindrical converging lens having a refractive power meridian, and the vergence of the light may change after the probe light passes through the refractive power meridian. The detection light is converged into linear detection light after passing through the cylindrical converging lens. In practical applications, the second converging lens may also be formed by combining a plurality of lenses, for example, the second converging lens may include a plurality of lens combinations such as a cylindrical lens, a concave lens, a convex lens, and a plane mirror.

The second linear diaphragm is arranged on one side of the converging lens far away from the second collimating lens and used for filtering stray light in the detection light. The second linear diaphragm may include a diaphragm body provided with a linear aperture forming a diaphragm. And light emitted by the linear light source passes through the second collimating lens, the second converging lens and the second linear diaphragm to form linear detection light.

The beam splitter is located the light-emitting side of light source spare, and the beam splitter is configured as can see through the light of first side to reflect the light of second side, the one side that the beam splitter is close to the light source is the first side.

The optical axes of the beam splitter and the detection light are crossed, and the optical axes of the beam splitter and the detection light are not vertical. The detection light output by the light source component can enter the dispersion lens through the beam splitter, and when the light reflected by the imaging component irradiates the beam splitter, the beam splitter can reflect the light.

The beam splitter may be a single-sided see-through mirror having a reflective surface and a transmissive surface, the transmissive surface of the single-sided see-through mirror facing the light source element and the reflective surface of the single-sided see-through mirror facing the dispersive lens. And the reflecting surface of the single-sided perspective mirror is not vertical to the optical axis of the detection light. The light emitted by the light source component irradiates to the dispersion lens through the single-sided perspective mirror, the light reflected by the imaging component irradiates to the reflecting surface of the single-sided perspective mirror through the dispersion lens, and the reflecting surface of the single-sided perspective mirror reflects the light to the spectrum sensor.

For example, the perspective surface and the reflection surface of the beam splitter are disposed in parallel, and the angle between the beam splitter and the optical axis of the probe light may be 45 degrees. The light reflected by the reflecting surface of the beam splitter is transmitted to the side part of the light source part, and the spectrum sensor is arranged on the side part of the light source part.

The dispersion lens is arranged on one side of the beam splitter, which is far away from the light source, and is used for focusing the detection light with different wavelengths on different positions of one side of the dispersion lens, which is far away from the beam splitter.

The dispersion is a phenomenon that the complex color light is decomposed into monochromatic light to form a spectrum, that is, the dispersion lens can decompose the complex color detection light into a plurality of monochromatic lights of different colors. And the focal point of the dispersive lens is different for different colors (wavelengths) of light. After the probe light passes through the dispersion lens, the focal points of the light with different wavelengths are different from the dispersion lens. For example, light having a wavelength of 700 nm is focused at a first location, light having a wavelength of 550 nm is focused at a second location, and light having a wavelength of 400 nm is focused at a third location.

In step S730, an actual position of the camera may be determined according to the spectrum data collected by the spectrum sensor.

The actual position of the camera can be determined through the control module, and the control module is connected with the spectrum sensor and used for determining the posture of the imaging component according to the spectrum data detected by the spectrum sensor. The control module is provided with a wavelength-focus mapping relation, and the wavelength-focus mapping relation comprises a mapping relation between the focus of the dispersive lens and the wavelength of the detection light. The wavelength-focus mapping may be determined by calibration. The wavelength-focus mapping may be stored in the control module in the form of a table or a function.

In step S740, a theoretical position of the camera under the current driving signal may be determined according to the driving signal.

The motor can respond to the current driving signal to drive the motion result of the camera under the current driving signal, and further determine the theoretical position of the camera.

The theoretical position of the camera obtained through calculation and the actual position of the camera obtained through testing can be compared, and when the difference between the actual position and the theoretical position of the camera is smaller than a preset threshold value, the imaging assembly is determined to be qualified. And when the difference between the actual position and the theoretical position of the camera is greater than or equal to a preset threshold value, determining that the imaging assembly is unqualified.

In step S760, the rotation arm is controlled to rotate to drive the test fixture, the imaging component and the optical component to rotate, so as to test the imaging component by the optical component in different postures, and the rotation arm is connected with the test fixture and the imaging component.

Wherein, the support is used for forming the testing arrangement's of formation of image subassembly main part, and the support can include base and connecting portion, and base and connecting portion are connected, and the base is used for supporting whole testing arrangement, and connecting portion are used for connecting the swinging boom.

The rotating arm is rotatably connected with the connecting part, a driving motor can be arranged on the connecting part, the driving motor is connected with the rotating arm, and the rotating arm is driven to rotate relative to the support through the driving motor. The driving motor is connected with the control module, a driving signal is provided for the driving motor through the control module, and the control module controls the rotating arm to rotate by a preset angle. When the rotating arm stops at the preset position, the control module controls the spectrum sensor to detect the spectrum data of the second reflected light.

For example, the driving motor may be a servo motor or a stepping motor. When driving motor is servo motor, driving motor can include motor and servo driver, and the motor is connected in connecting portion, and the output shaft and the swinging boom of motor are connected, and servo driver and control module group connect, and servo driver is according to the signal driving motor of control module group output. When driving motor is step motor, driving motor can include motor and step driver, and the motor is connected in connecting portion, and the output shaft and the swinging boom of motor are connected, and step driver and control module group connect, and step driver is according to the signal driving motor of control module group output.

Or the rotating arm can also be rotatably connected to the connecting part, and the relative position relationship between the rotating arm and the connecting part can be adjusted in a manual rotating mode. For example, a damping member may be disposed on the connection portion, and the damping member is configured to enable relative rotation between the rotating arm and the connection portion when a force applied to the rotating arm is greater than a preset threshold.

Wherein a scale value configured to be 0-360 degrees along a circumference may be provided on the rotating portion. The angle of rotation of the rotating arm relative to the connecting part can be determined by the scale value on the connecting part. The pose of the imaging assembly can thus be determined, determining the effect of the pose of the imaging assembly on the motor output.

During testing, the rotating arm can be rotated to enable the imaging assembly to be in different postures, and a motor in the imaging assembly is tested. For example, the motor can be tested when the included angles between the rotating arm and the connecting part are 0 degree, 45 degrees, 90 degrees, 135 degrees and 180 degrees.

In step S770, the light source unit may be controlled to move in a predetermined direction, so that the detected light scans the reflective surface to determine spectral data of the detected light focused on the reflective surface.

The optical assembly and the rotary arm can be in sliding connection, and the optical assembly can slide along the direction perpendicular to the optical axis of the detection light. For example, in a cartesian coordinate system, the optical axis of the probe light is along the Z direction, and the optical assembly can slide in the X direction and the Y direction.

The testing device for the imaging assembly provided by the embodiment of the disclosure can further comprise a connecting plate, wherein the connecting plate is connected to the bracket, the connecting plate is opposite to the testing clamp, and the optical assembly is slidably connected to one side, facing the testing clamp, of the connecting plate.

The optical assembly is arranged on one side, facing the test fixture, of the connecting plate, the to-be-tested imaging assembly is clamped on the test fixture, and the reflecting surface is opposite to the optical assembly. The connecting plate is provided with a slide rail, and the optical assembly is connected with the slide rail.

For example, the connecting plate may include a first plate and a second plate, the first plate is connected to the rotating arm, the second plate is connected to the first plate, the second plate is capable of sliding in the X direction relative to the first plate, the optical assembly is connected to the second plate, and a slide rail in the Y direction is disposed on the second plate, and the optical assembly is capable of moving along the slide rail.

Through the test of scanning formula, can test anti-shake motor. Under the drive of the anti-shake motor, the reflecting surface can form any included angle with the optical axis of the optical component. When the motor moves for one step length, the position of the camera is subjected to scanning test by the optical assembly. The scanning test can acquire the spectral data of any point on the reflecting surface, and then can confirm the spatial position of whole reflecting surface, confirms the motion state of anti-shake motor according to the spatial position of reflecting surface, realizes the test of anti-shake motor.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A testing apparatus for an imaging assembly, comprising:

the testing fixture is arranged on one side, away from the beam splitter, of the dispersive lens and used for clamping the imaging assembly, the imaging assembly is provided with a reflecting surface, the reflecting surface can reflect the detection light focused on the reflecting surface to form first reflected light, the first reflected light irradiates the beam splitter, the beam splitter reflects the first reflected light to form second reflected light, the spectrum sensor is used for receiving the second reflected light, and the spectrum sensor is used for detecting the spectrum of the second reflected light.

2. The apparatus for testing an imaging assembly according to claim 1, wherein the light source unit is a linear light source unit, and the probe light emitted from the linear light source unit is a linear probe light.

3. The imaging assembly testing apparatus of claim 2, wherein the light source device comprises:

a point light source;

the first collimating lens is arranged on the light emitting side of the point light source and used for converting the light emitted by the point light source into parallel light;

the first converging lens is arranged on one side, far away from the point light source, of the first collimating lens and is used for converging the parallel light rays to form linear light;

the first linear diaphragm is arranged on one side, away from the first collimating lens, of the first converging lens and used for filtering stray light in the linear light and outputting linear detection light.

4. The imaging assembly testing apparatus of claim 2, wherein said light source unit comprises:

a line light source;

the second collimating lens is arranged on the light emitting side of the linear light source and is used for collimating the light of the linear light source so as to output parallel light;

the second converging lens is arranged on one side, away from the linear light source, of the second collimating lens and is used for converging the parallel light rays to form linear light;

and the second linear diaphragm is arranged on one side of the second converging lens, which is far away from the second collimating lens, and is used for filtering stray light in the linear light and outputting linear detection light.

5. The imaging assembly testing apparatus of claim 1, wherein the probe light has a wavelength of 400 nm to 700 nm.

6. The imaging assembly testing apparatus of claim 1, further comprising:

a support;

a rotary arm connected to the support, the rotary arm being rotatable relative to the support, and the optical assembly and the test fixture being disposed on the rotary arm.

7. The imaging assembly testing apparatus of claim 6 wherein the optical assembly and the rotary arm are slidably connected.

8. The imaging assembly testing apparatus of claim 7, further comprising:

the connecting plate is connected to the support, the connecting plate and the test fixture are oppositely arranged along the direction of the measuring light path, and the optical assembly is connected to one side, facing the test fixture, of the connecting plate in a sliding mode.

9. The imaging assembly testing apparatus of claim 7, further comprising:

the reflector is arranged on one side, facing the connecting plate, of the imaging assembly, and the reflector forms the reflecting surface.

10. The imaging assembly testing apparatus of any of claims 1-9, further comprising:

the control module is connected with the spectral sensor and used for determining the position of the imaging assembly according to the spectral data detected by the spectral sensor.

11. The apparatus for testing an imaging assembly of claim 10, wherein the control module has a wavelength-focus mapping comprising a mapping of a focal point of the dispersive lens and a wavelength of the probe light.

12. The apparatus for testing an imaging assembly according to any of claims 1-9, wherein the imaging assembly comprises a motor and a camera, the camera is connected to the motor, and the motor is used to drive the camera, and the reflective surface is located on a side of the camera remote from the motor.

13. A method of testing an imaging assembly, the imaging assembly including a camera and a motor, the camera and the motor being coupled and the motor being for driving the camera, the method comprising:

providing a driving signal to the motor to drive the camera to move;

14. The testing method of claim 13, further comprising:

determining the theoretical position of the camera under the current driving signal according to the driving signal;

and when the difference between the actual position and the theoretical position of the camera is smaller than a preset threshold value, determining that the imaging assembly is qualified.

15. The testing method of claim 13, further comprising:

the control swinging boom rotates to drive the test fixture image component and optical component rotate, in order to realize the test of optical component to the image component under different gestures, the swinging boom with the test fixture reaches the image component is connected.

16. The testing method of claim 15, further comprising:

and controlling the light source component to move along a preset direction, so that the detection light scans the reflecting surface to determine the spectral data of the detection light focused on the reflecting surface.