CN215448417U - Test focusing device and SFR test equipment - Google Patents

Abstract

The utility model belongs to the technical field of lens manufacturing, and discloses a test focusing device and SFR (Small form-factor response) test equipment, wherein the test focusing device comprises a lens fixing mechanism, an SFR test mechanism and a focusing mechanism, the lens fixing mechanism comprises a reference plate and a pushing and pressing component, a lens module is attached to the reference plate forwards, the pushing and pressing component can move in the direction close to the reference plate to press the rear end of the lens module so as to fix the lens module on the reference plate, the SFR test mechanism comprises a test plate and an image processor, the lens module faces the test plate, the test plate can display Chart lineation, the image processor can process Chart images acquired by the lens module, and the focusing mechanism is used for rotating a lens of the lens module to perform focusing; the SFR test equipment comprises the test focusing device. The front surface of the lens module is attached to the reference plate, and the front surface of the lens module is used as a positioning reference and is consistent with a reference in actual use, so that the accuracy and focusing precision of the analytic force test are improved.

Description

Test focusing device and SFR test equipment

Technical Field

The utility model relates to the technical field of lens manufacturing, in particular to a focusing test device and SFR test equipment.

Background

Currently, when a lens module is manufactured, a lens needs to be assembled to a lens mount and a relative position between the lens and the lens mount needs to be adjusted to complete focusing of the lens. In the prior art, a lens module is generally tested and focused in an upward posture, so that the positioning mode of the lens module during focusing is inconsistent with the positioning mode during actual use, the analysis force test of the lens module is inaccurate, the focusing precision is not high, and the final imaging quality of the lens module is affected.

Based on the above current situation, it is necessary to design a focusing device for testing and an SFR testing apparatus to solve the above problems.

SUMMERY OF THE UTILITY MODEL

One object of the present invention is: the test focusing device takes the front of a lens module as a positioning reference, and improves the accuracy and focusing precision of the analytic force test.

Another object of the utility model is: an SFR test device is provided, which comprises the test focusing device.

In order to achieve the purpose, the utility model adopts the following technical scheme:

in one aspect, a test focus apparatus is disclosed, comprising:

the lens fixing mechanism comprises a reference plate and a pushing and pressing assembly, the lens module is attached to the reference plate forwards, and the pushing and pressing assembly can move in the direction close to the reference plate to abut against the rear end of the lens module so as to fix the lens module on the reference plate;

the SFR (Spatial Frequency Response) testing mechanism comprises a testing board and an image processor, wherein the lens module faces to the testing board, the testing board can display Chart scribing lines, and the image processor can process Chart images acquired by the lens module;

and the focusing mechanism is used for rotating the lens of the lens module to execute focusing action.

Preferably, the test board is placed along a vertical direction, and the lens module faces the test board along a horizontal direction.

As a preferred scheme, a positioning pin is arranged on the reference plate, a corresponding positioning hole is formed in a metal plate support of the lens module, and the positioning pin is inserted into the positioning hole to position the lens module on the reference plate.

Preferably, the pushing assembly includes:

a drive member;

the ejector pin is connected to the execution end of the driving piece, and the driving piece can drive the ejector pin to move along the direction close to the reference plate so that the ejector pin is abutted against the rear end of the lens module.

As a preferred scheme, the front end of the thimble is an elastic end, and the elastic end flexibly abuts against the rear end of the lens module.

Preferably, the driving member is provided as a handle, and the pushing assembly further comprises:

the ejector pin can slide on the base along a direction close to or far away from the reference plate;

the handle is arranged in the first sliding groove and the second sliding groove in a sliding mode and is connected with the ejector pin, and when the handle is located in the first sliding groove, the handle can drive the ejector pin to slide on the base; when the handle is located in the second sliding groove, the ejector pin is pressed against the lens module and stops sliding.

As a preferred scheme, the pushing and pressing assembly further comprises a pressing plate and a resetting piece, at least two ejector pins are mounted on the pressing plate, the pressing plate is connected to the base in a sliding mode along a direction close to or far away from the reference plate, one end of the resetting piece is connected with the pressing plate, the other end of the resetting piece is connected with the base, and the resetting piece can drive the pressing plate to slide along a direction far away from the reference plate.

As a preferable aspect, the focusing mechanism includes:

the lens penetrates through the bracket;

the clamping jaw assembly is rotatably connected to the support and located on the periphery of the lens, and the clamping jaw assembly can abut against the lens to drive the lens to rotate.

As a preferable scheme, the test focusing device further comprises a distance-increasing lens, the distance-increasing lens is located between the test board and the lens, and the distance-increasing lens can prolong the focal length of the lens.

On the other hand, the SFR test equipment comprises the test focusing device.

The utility model has the beneficial effects that: the front surface of the lens module is attached to a reference plate, the pushing component can move along the direction close to the reference plate to fix the lens module on the reference plate, the front surface of the lens module is used as a positioning reference and is consistent with the reference when the lens module is actually installed on the whole machine, and the accuracy and focusing precision of an analytic force test are improved; SFR test equipment includes foretell test focusing device, has improved production quality.

Drawings

The utility model is explained in more detail below with reference to the figures and examples.

FIG. 1 is a schematic diagram of a focus mount under test;

FIG. 2 is a schematic view of a lens module;

FIG. 3 is a schematic view of a first view angle of the lens holder;

FIG. 4 is a structural diagram of a second view angle of the lens holder;

FIG. 5 is a schematic structural diagram of a focusing mechanism;

FIG. 6 is a schematic structural view of the focusing device after the test board is detached.

In fig. 1 to 6:

1. a lens fixing mechanism; 11. a reference plate; 111. positioning pins; 12. a pushing assembly; 121. a handle; 122. a thimble; 123. a base; 124. a guide plate; 1241. a first chute; 1242. a second chute; 125. pressing a plate; 126. a reset member;

21. a test board;

3. a focusing mechanism; 31. a support; 32. a jaw assembly; 321. a first jaw; 322. an elastic member; 323. a second jaw; 33. a pin shaft;

4. a distance increasing mechanism; 41. a distance-increasing mirror; 42. a mounting frame; 43. a cylinder;

5. a lens module; 51. a lens; 52. a sheet metal bracket; 521. positioning holes; 53. a lens mount; 54. a PCB board;

61. a frame; 62. a bearing platform.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

The lens module 5 includes a lens 51, a lens mount 53, a metal plate bracket 52 and a PCB (Printed Circuit Board) Board 54, the lens 51 is rotatably connected in the lens mount 53, the PCB Board 54 is disposed at one end of the lens mount 53 far away from the lens 51, the metal plate bracket 52 is sleeved on and fixed to the lens mount 53, and in the whole camera, one surface of the metal plate bracket 52 far away from the PCB Board 54 is fixed on the casing, namely, the mounting surface is used as a positioning reference. In the production of the lens module 5, it is necessary to mount the lens 51 to the lens holder 53 and adjust the relative positions of the lens 51 and the lens holder 53 to complete focusing of the lens 51. In the prior art, the lens module 5 is generally tested and focused in an upward posture, that is, the back of the sheet metal bracket 52 close to the PCB 54 is used as a positioning reference, which is different from a reference actually installed in the whole camera, and therefore, the accuracy of the resolution test and the focusing precision of the lens module 5 are affected. The embodiment provides a test focusing device, the preceding attached on benchmark board 11 of lens module 5, bulldoze subassembly 12 with lens module 5 support and be fixed in on benchmark board 11, it uses the preceding benchmark of panel beating support 52 or lens mount 53 as the location benchmark, is unanimous with the benchmark of actually installing in the casing, has improved test accuracy and focusing precision.

As shown in fig. 1 and 2, the focusing device for testing comprises a lens fixing mechanism 1, an SFR testing mechanism and a focusing mechanism 3, wherein the lens fixing mechanism 1 comprises a reference plate 11 and a pushing and pressing assembly 12, the reference plate 11 is fixed on a bearing table 62, the front surface of a sheet metal bracket 52 is attached to the reference plate 11, and the pushing and pressing assembly 12 moves in the direction close to the reference plate 11 to press against a PCB 54 at the rear end so as to fix a lens module 5 on the reference plate 11; the SFR testing mechanism comprises a testing board 21 and an image processor, wherein the testing board 21 is fixed on the rack 61, a Chart scribing line is displayed on the testing board 21, the lens 51 faces the testing board 21 to acquire a Chart image, and the image processor is in communication connection with the PCB 54 to process the Chart image acquired by the lens module 5 through an SFR model; according to the analysis force test result, the focusing mechanism 3 can rotate the lens 51 on the lens mount 53 to focus the lens 51. In the focusing work, the front surface of the sheet metal support 52 is taken as a positioning reference, the lens module 5 is fixed on the reference plate 11 through the pushing component 12, the lens 51 acquires a Chart image, the image processor obtains a test result of the resolving power through an SFR mathematical model, and then the focusing mechanism 3 is used for focusing the lens 51 according to the test result to enable the resolving power to be optimal. It can be understood that, when the test focusing device of the embodiment is used for focusing, the front surface of the sheet metal support 52 is used as a positioning reference, and is consistent with a reference installed in the machine shell, so that the analytic force test accuracy and the focusing precision are improved. In other embodiments of the present invention, when the lens holder 53 is fixed to the chassis on the side away from the PCB 54 in the camera, the front surface of the lens holder 53 may be attached to the reference plate 11 to focus the lens 51, as long as it is consistent with the actual installation reference.

In this embodiment, the test board 21 is a dimming backlight board, and the dimming backlight board displays transmissive Chart scribing, so that a paper Chart board in the prior art is replaced, the problem of aging and discoloration does not occur, the test accuracy is improved, and the service life is prolonged.

In this embodiment, the test board 21 is disposed along the vertical direction, and the lens module 5 faces the test board 21 along the horizontal direction, so as to facilitate the lens module 5 to be mounted during the focusing process. Wherein survey test panel 21 and be fixed in frame 61, install the guide rail on the frame 61, the guide rail extends along the horizontal direction, and lens fixed establishment 1 and benchmark board 11 are installed on plummer 62, and the bottom of plummer 62 is fixed with the slider, and slider sliding connection is on the guide rail, and the locking hand (hold) runs through plummer 62 and is connected to frame 61 on, can be fixed in the appointed position on frame 61 with plummer 62. When the distance between the lens module 5 and the test board 21 needs to be adjusted, the locking handle only needs to be unlocked, then the plummer 62 is slid on the frame 61, and finally the locking handle is pressed, so that the operation is simple.

As shown in fig. 3 and 4, the reference plate 11 is provided with the positioning pins 111, the number of the positioning pins 111 can be set as required, the embodiment is provided with two left and right positioning pins 111, the sheet metal bracket 52 is provided with positioning holes 521 corresponding to the positioning pins 111 one by one, and when the positioning pins 111 are inserted into the positioning holes 521, the lens module 5 can be positioned on the reference plate 11, and the structure is simple. In other embodiments of the present invention, the sheet metal bracket 52 may also be positioned on the reference plate 11 by using the clamping groove and the clamping block, which is not described herein again.

Specifically, the pushing and pressing assembly 12 includes a driving element and a thimble 122, the thimble 122 is connected to an execution end of the driving element, the driving element can drive the thimble 122 to move in a direction close to the reference plate 11 and the lens module 5, so that the thimble 122 can be inserted into a screw hole on the PCB 54 at the rear end of the lens module 5, and the lens module 5 can be fixed on the reference plate 11.

As a preferred embodiment, the front end of the thimble 122 is an elastic end, and specifically, the main body of the thimble 122 of this embodiment is sleeved with a spring, and when the thimble 122 presses the PCB 54, the elastic force of the spring can urge the front end of the thimble 122 to firmly press the PCB 54, thereby improving reliability.

In this embodiment, the driving member is a handle 121, the pushing assembly 12 further includes a base 123 and a guide plate 124, the horizontal direction is a direction close to or away from the reference plate 11, the thimble 122 can slide on the base 123 along the horizontal direction, a first sliding slot 1241 and a second sliding slot 1242 are formed on the guide plate 124, the first sliding slot 1241 extends along the horizontal direction, the second sliding slot 1242 is formed at a distal end of the first sliding slot 1241 close to the reference plate 11, the second sliding slot 1242 extends along the vertical direction, and the handle 121 is slidably disposed in the first sliding slot 1241 and the second sliding slot 1242 and connected to the thimble 122. When the handle 121 slides in the first chute 1241, the handle 121 can carry the thimble 122 to move in the horizontal direction; when the handle 121 is placed in the second chute 1242 from the end of the first chute 1241, the handle 121 cannot slide in the first chute 1241, i.e. the thimble 122 locks the lens module 5 on the reference plate 11. In other embodiments of the present invention, the driving member may also be configured as an air cylinder or an electric push rod, and the thimble 122 is connected to an output end of the air cylinder or the electric push rod, and can also function to drive the thimble 122 to move in the horizontal direction.

As a preferred embodiment, the pushing and pressing assembly 12 further includes a pressing plate 125 and a reset element 126, a sliding block is mounted on the pressing plate 125, a guide rail extending along the horizontal direction is mounted on the base 123, the sliding block is slidably connected to the guide rail, at least two ejector pins 122 are fixed on the pressing plate 125, where the specific number of the ejector pins 122 can be set as required, in this embodiment, two ejector pins 122 are provided, and the two ejector pins 122 can slide on the base 123 through the pressing plate 125; the reset member 126 can be a spring or a spring plate, the reset member 126 of this embodiment is a tension spring, one end of the tension spring is connected to the pressing plate 125, the other end of the tension spring is connected to the base 123, and when the handle 121 is adjusted from the second chute 1242 to the first chute 1241 to detach the lens module 5, the tension spring can drive the pressing plate 125 to slide in a direction away from the reference plate 11. In another embodiment of the present invention, a sliding hole may be formed in the base 123, and the thimble 122 is slidably disposed in the sliding hole, so that the thimble 122 can be slid on the base 123.

As shown in fig. 1 and 5, the focusing mechanism 3 includes a holder 31 and a gripper assembly 32, the holder 31 is fixed on the platform 62 and located between the reference plate 11 and the test plate 21, the lens 51 penetrates the holder 31, the gripper assembly 32 is rotatably connected to the holder 31, and the gripper assembly 32 is located on the periphery of the lens 51. When the gripper assembly 32 rotates on the bracket 31, the gripper assembly 32 can abut on the lens 51 and rotate with the lens 51, so that focusing of the lens 51 is realized.

Specifically, the clamping jaw assembly 32 includes a first clamping jaw 321, an elastic member 322, a second clamping jaw 323, the focusing mechanism 3 further includes a pin 33, the elastic member 322 may be a spring or a rubber pad, the elastic member 322 of this embodiment is a tension spring, the bracket 31 is provided with two pin shafts 33, the first clamping jaw 321 is rotatably connected to the bracket 31 through one pin shaft 33 and is located on one side of the lens 51, and the second clamping jaw 323 is rotatably connected to the bracket 31 through another pin shaft 33 and is located on the other side of the lens 51. When the lens 51 needs to be rotated to adjust the focal length, only the first clamping jaw 321 and the second clamping jaw 323 need to be pinched to clamp the lens 51, and then the lens 51 needs to be slightly rotated; after the adjustment is completed, the first jaw 321 and the second jaw 323 are released, and the tension spring can drive the first jaw 321 and the second jaw 323 away from each other and reset. In other embodiments of the present invention, a gear may be rotatably connected to the reference plate 11, one side of the gear is in transmission connection with the lens 51, and the gear may also rotate to bring the lens 51 to rotate to implement the focusing action.

As shown in fig. 1 and 6, the test focusing device further includes a distance-increasing mechanism 4, the distance-increasing mechanism 4 includes a distance-increasing lens 41, an installation frame 42 and a cylinder 43, the cylinder 43 is installed below the plummer 62, the installation frame 42 is connected to the output end of the cylinder 43, a guide rail extending along the horizontal direction is installed on the plummer 62, a slider is slidably connected to the guide rail, the installation frame 42 is fixed on the slider, the installation frame 42 is located between the test board 21 and the focusing mechanism 3, and the distance-increasing lens 41 is fixed on the installation frame 42. When the lens module 5 is fixed on the lens fixing mechanism 1, the distance-increasing lens 41 is located between the lens 51 and the test board 21, the focal length of the object distance side of the lens 51 can be extended, and the cylinder 43 can drive the distance-increasing lens 41 to move between the lens 51 and the test board 21, so that the distance-increasing size of the distance-increasing lens 41 can be adjusted according to the model of the lens 51, and the universality is improved. In this embodiment, the plummer 62 is provided with a limiting column, the limiting column is located on one side of the mounting frame 42 close to the focusing mechanism 3, the limiting column can abut against the mounting frame 42 to prevent the distance-increasing mechanism 4 from colliding with the focusing mechanism 3, and the reliability is improved.

The embodiment further provides an SFR test device, which includes the above test focusing device, and after the test focusing device tests and focuses the lens 51, the subsequent processing device of the SFR test device can fix the lens 51 on the lens mount 53, wherein the test focusing device improves the focusing precision, and further improves the final finished product production quality of the lens module 5.

In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are based on the orientation or positional relationship shown in the drawings for convenience in description and simplicity of operation, 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 are not to be considered limiting of the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (10)

1. A test focus apparatus, comprising:

the lens fixing mechanism (1) comprises a reference plate (11) and a pushing component (12), a lens module (5) is attached to the reference plate (11) forwards, and the pushing component (12) can move along the direction close to the reference plate (11) to press the rear end of the lens module (5) so as to fix the lens module (5) on the reference plate (11);

the SFR testing mechanism comprises a testing board (21) and an image processor, wherein the lens module (5) faces the testing board (21), the testing board (21) can display a Chart scribing line, and the image processor can process a Chart image acquired by the lens module (5);

and the focusing mechanism (3) is used for rotating the lens (51) of the lens module (5) to execute focusing action.

2. The test focus adjustment device according to claim 1, wherein the test board (21) is placed in a vertical direction, and the lens module (5) faces the test board (21) in a horizontal direction.

3. The test focusing device according to claim 1, wherein a positioning pin (111) is arranged on the reference plate (11), a corresponding positioning hole (521) is formed in a sheet metal bracket (52) of the lens module (5), and the positioning pin (111) is inserted into the positioning hole (521) to position the lens module (5) on the reference plate (11).

4. The test focus fixture of claim 1, wherein the bias assembly (12) comprises:

a drive member;

the ejector pin (122) is connected to the execution end of the driving piece, and the driving piece can drive the ejector pin (122) to move along the direction close to the reference plate (11) so that the ejector pin (122) is pressed against the rear end of the lens module (5).

5. The test focusing device according to claim 4, wherein the front end of the thimble (122) is an elastic end, and the elastic end is flexibly pressed against the rear end of the lens module (5).

6. The test focus fixture of claim 5, wherein the actuator is provided as a handle (121), the pushing assembly (12) further comprising:

a base (123), on which the thimble (122) can slide in a direction approaching or departing from the reference plate (11);

the guide plate (124), a first sliding chute (1241) and a second sliding chute (1242) are formed in the guide plate (124), the first sliding chute (1241) extends along the horizontal direction, the second sliding chute (1242) is located on the wall of the first sliding chute (1241) and extends along the vertical direction, the handle (121) is slidably arranged in the first sliding chute (1241) and the second sliding chute (1242) and is connected with the ejector pin (122), and when the handle (121) is located in the first sliding chute (1241), the handle (121) can drive the ejector pin (122) to slide on the base (123); when the handle (121) is located in the second sliding groove (1242), the thimble (122) is pressed against the lens module (5) and stops sliding.

7. The test focusing apparatus according to claim 6, wherein the pushing assembly (12) further comprises a pressing plate (125) and a resetting member (126), at least two of the ejector pins (122) are mounted on the pressing plate (125), the pressing plate (125) is slidably connected to the base (123) in a direction approaching to or departing from the reference plate (11), one end of the resetting member (126) is connected to the pressing plate (125), the other end of the resetting member is connected to the base (123), and the resetting member (126) can drive the pressing plate (125) to slide in a direction departing from the reference plate (11).

8. A test focus fixture as claimed in claim 1, wherein the focus mechanism (3) comprises:

a holder (31), through which the lens (51) penetrates the holder (31);

the clamping jaw assembly (32) is connected to the support (31) in a rotating mode, the clamping jaw assembly (32) is located on the peripheral side of the lens (51), and the clamping jaw assembly (32) can abut against the lens (51) to drive the lens (51) to rotate.

9. A test focus adjustment device according to claim 1, further comprising a range-increasing mirror (41), said range-increasing mirror (41) being located between said test plate (21) and said lens (51), said range-increasing mirror (41) being capable of extending the focal length of said lens (51).

10. An SFR test apparatus comprising a test focus mount as claimed in any of claims 1 to 9.

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