CN201203517Y - A test device for an interchangeable lens - Google Patents

Abstract

The utility model provides a test device with a replaceable lens, which is used for testing the lens and image sensor, including a movable block, a base and a PCB mounting plate, and the image sensor is mounted on the PCB mounting plate; the base is detachably fixed on the PCB mounting plate The side with the image sensor is mounted; the movable block and the base can be movably assembled, and the lens is inlaid and installed on the movable block to align with the image sensor. The test device for replaceable lens provided by the utility model realizes changing the lens during the test process, and realizes double adjustment of the focal length, has strong flexibility, is easy to test whether the lens matches the image sensor, and can also use multiple lenses to test the performance of the image sensor. It can greatly reduce the test time, improve efficiency, and indirectly improve the efficiency of product development. The image sensor packaging structure proposed in this embodiment is convenient for packaging and significantly saves costs.

Description

A test device for an interchangeable lens

technical field

The utility model relates to the field of optical imaging, in particular to a test device for a replaceable lens.

Background technique

At present, many electronic test and verification devices, especially CMOS image sensor test and verification devices, use a single module to test and verify the imaging effect of the image sensor (ie sensor), and to perform a comparative test on different lenses, different lenses need to be packaged separately.

A packaging structure of the prior art is shown in Figure 1 and Figure 2, the image sensor 2 is packaged into the package block 12 through the cob binding wire 13, the sokect 11 of the image sensor is soldered to the PCB mounting board 10, and the package block is tested during the test. 12 is set into sokect1 of image sensor 2 for testing. The packaging block 12 is expensive and difficult to operate, and the image sensor 2 and the PCB mounting board 10 cannot be separated after packaging.

Using the existing packaging technology, in order to select a lens matching the image sensor and test the performance of the image sensor, it is often necessary to package multiple lenses separately, which brings inconvenience to the test and wastes resources.

Contents of the invention

The purpose of the utility model is to provide a test device with a replaceable lens, so that the lens can be replaced conveniently during the test.

The utility model provides a test device with a replaceable lens, which is used for lens and image sensor testing, including a movable block, a base and a PCB mounting plate, and the image sensor is mounted on the PCB mounting plate; the base is detachably fixed on the PCB mounting plate The side with the image sensor is mounted; the movable block and the base are movably assembled, and the lens is inlaid and installed on the movable block to align with the image sensor.

Preferably, the test device for the interchangeable lens further includes an inlay block, the lens inlay is installed on the inlay block, and the inlay block is inlay mounted on the movable block to be aligned with the image sensor.

The above inlay block is a hollow cylinder or a hollow round platform, the upper end is inlaid with the lens, and the lower end is inlaid on the movable block.

The above-mentioned movable block is a planar structure, and a through hole is provided in the middle part of the movable block, which is used for inlaying and installing the lens.

Preferably, the inside of the through hole of the above-mentioned movable block is provided with threads, and the threads cooperate with the external threads of the lens to mount the lens on the movable block.

The above-mentioned base is a square box structure, and the side of the base in contact with the movable block is provided with a base through-hole, which realizes light transmission and cooperates with the through-hole of the movable block to realize positioning.

The above-mentioned base and/or movable block are made of ferromagnetic metal and/or have magnets, and the base and the movable block are attracted to each other by magnetic force to realize movable assembly.

The above-mentioned test device for an interchangeable lens further includes at least one screw to realize detachable fixing between the base and the PCB installation board.

The above-mentioned PCB mounting board is provided with at least one screw hole, and at least one stud is provided on both sides of the base, and the position of the at least one stud corresponds to the position of the at least one screw hole respectively; the screw passes through at least one stud and at least one screw hole, and the base Fixed with PCB mounting plate.

Preferably, the image sensor is packaged on the PCB mounting board through cob (chip on board) chip bonding and wire bonding, and a transparent cover is packaged above the image sensor through PLCC (plastlc leaded chip carrier) plastic chip carrier with leads.

The test device for replaceable lens provided by the utility model can change the lens at will during the test process, and can realize double adjustment of the focal length. It has strong flexibility and is easy to test whether the lens matches the image sensor, and can also use multiple lenses to test the image sensor. Performance, so as to overcome the shortcomings of the existing technology that cannot be replaced at will after packaging or attachment, or even scrapped modules, which can greatly reduce test time, improve efficiency, and indirectly improve product research and development efficiency. The image sensor packaging structure proposed in this embodiment is convenient for packaging and significantly saves costs.

Description of drawings

FIG. 1 is a schematic perspective view of a packaging structure in the prior art;

FIG. 2 is a schematic plan view of a packaging structure in the prior art;

Fig. 3 is a schematic diagram of assembly of the first embodiment of the utility model;

Fig. 4 is an exploded schematic diagram of the first embodiment of the utility model;

Fig. 5 is a schematic diagram of assembly of the second embodiment of the utility model;

Fig. 6 is an exploded schematic view of the second embodiment of the utility model;

Fig. 7 is a three-dimensional schematic diagram of the packaging structure of the third embodiment of the present invention;

Fig. 8 is a schematic plan view of the packaging structure of the third embodiment of the present invention.

The realization of the purpose of the utility model, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

The utility model proposes the first embodiment. Referring to the assembly schematic diagram of the first embodiment shown in FIG. 3 , the test device for the replaceable lens of this embodiment realizes the detachable assembly of the lens 5 and the image sensor 2, specifically including the movable block 4, The base 3 and the PCB mounting board 1, wherein the image sensor 2 is mounted on the PCB mounting board 1, the base 3 is detachably fixed on the side of the PCB mounting board 1 where the image sensor 2 is mounted, and the movable block 4 and the base 3 can be movably assembled , the lens 5 is inlaid and installed on the movable block 4, and is aligned with the image sensor 2.

This embodiment is applicable to a variety of image sensors. The image sensor 2 can be selected from a variety of image sensors, and cooperates with the lens 5 to generate an image signal according to the imaging generated by the lens 5 .

The PCB mounting board 1 of this embodiment adopts a general-purpose image sensor adapter board, which is suitable for various image sensors; various existing mounting technologies can be used to mount the image sensor 2 on the PCB mounting board 1 to define the PCB installation The pins of the board 1 can drive the image sensor 2 to work; this embodiment is applicable to various general standard lenses, and the lens 5 can adopt various lenses.

Referring to the exploded diagram of the first embodiment shown in FIG. 4 , in this embodiment, screws are used to detachably fix the base 3 and the PCB mounting board 1 . The PCB mounting board 1 is provided with at least one screw hole 11 . The base 3 is a square box structure, and the side of the base 3 in contact with the movable block 4 is provided with a base through hole 32; the two sides of the base 3 are provided with at least one stud 31, and the position of at least one stud 31 is respectively at least the same as that on the PCB mounting board 1. The position of a screw hole 11 is corresponding; this embodiment also includes a screw 6 matched with the stud 31 , and the screw 6 cooperates with the stud 31 to fix the PCB mounting board 1 and the base 3 .

The movable block 4 in this embodiment is a planar structure, and a movable block through hole 41 is provided in the middle of the planar structure; the movable block through hole 41 is used for mounting the lens 5 . The movable block 4 is assembled with the base 3 to realize the corresponding combination of the lens 5 and the image sensor 2, and the image sensor 2 senses the imaging generated by the lens 5 to generate an image signal.

In this embodiment, magnets are used to realize the movable assembly of the movable block 4 and the base 3 . The base 3 and/or the movable block 4 are made of ferromagnetic metal and/or have magnets, and the base 3 and the movable block 4 are assembled into one body by mutual adsorption through magnetic force; the outline of the through hole 32 of the base corresponds to the outline of the through hole 41 of the movable block , the two cooperate with each other to realize the positioning, so that after the base 3 and the movable block 4 are assembled, the through hole 32 of the base is directly opposite to the through hole 41 of the movable block, so as to avoid blocking light from affecting the imaging effect of the lens 5.

When using this embodiment for testing, first fix the base 3 and the PCB mounting board 1 on which the image sensor 2 is mounted, then install multiple lenses 5 on the movable block 4 in turn, and then attach the movable block 4 to the base 3, test whether each lens 5 matches the image sensor 2 in turn, or use each lens 5 to test the performance of the image sensor 2. When replacing the lens, you only need to remove the lens 5 from the movable block 4, and then install another lens 4; The PCB mounting board 1 of the image sensor 2 and the base 3 are fixed.

In the above embodiments, the lens and the image sensor are movably assembled, so that the lens can be replaced at will. Most existing general standard lenses are provided with standard external threads for installation. In order to better realize testing, the present invention proposes an improved second embodiment for most lenses provided with standard external threads.

The inner side of the through hole 41 of the movable block in this embodiment is provided with a screw thread, which matches with the external screw thread of the lens 5, so that the lens 5 can be embedded and installed on the movable block 4. At this time, the lens 5 is rotated, and the distance between the lens 5 and the image sensor 2 is adjusted by screw threads, that is, the focal length is adjusted. Combined with the focal length adjustment of the lens 5 itself, two focal length adjustment modes can be realized. The screw thread on the movable block 4 is generally used for coarse adjustment, and the lens 5 itself is generally used for fine adjustment.

Due to the limited pitch of some optical lenses 5, the excessive thickness of the base 3 may cause the lens 5 to fail to focus or have poor imaging effects, affecting the test. For this reason the thickness of the base 3 of the present embodiment should not exceed 13mm.

Part of the lenses used in mobile phones, handheld digital devices, etc. are relatively small in size and difficult to disassemble. The utility model proposes a third embodiment for adapting to such small lenses.

Referring to the schematic assembly diagram of the second embodiment shown in FIG. 5 and the exploded schematic diagram of the second embodiment shown in FIG. 6, the test device for the interchangeable lens of this embodiment realizes the detachable assembly of the small lens 7 and the image sensor 2, including The insert 8, the movable block 4, the base 3 and the PCB mounting board 1, wherein the image sensor 2 is mounted on the PCB mounting board 1, and the base 3 is detachably fixed on the side of the PCB mounting board 1 where the image sensor 2 is mounted, The movable block 4 and the base 3 can be movably assembled, the lens 5 is fixed on the inlay block 8 , and the inlay block 8 is inlaid and mounted on the movable block 4 .

The movable block 4, the base 3 and the PCB mounting plate 1 of the present embodiment are similar to the foregoing implementations, so no further description is given; the above-mentioned insert 8 is a hollow cylinder or a hollow round table, and the upper end can be inlaid with a small lens 7, and the outer contour of the lower end is the same as that of the movable block 4. The inner contour of the movable block through hole 41 is corresponding, so that the insert 8 can be embedded and installed on the movable block through hole 41 of the movable block 4 . The hollow of the insert 8 can realize light transmission, so that the imaging generated by the small lens 7 can be projected on the image sensor 2 . Insert block 8 can be made into different sizes and models respectively according to different specifications or small lenses 7 of different manufacturers, so that various small lenses 7 can be assembled on movable block 4 .

When using this embodiment for testing, the base 3 and the PCB mounting plate 1 mounted with the image sensor 2 can be fixed first; a plurality of small lenses 7 are inlaid and installed on a plurality of inserts 8 respectively, and the plurality of inserts 8 Installed on the movable block 4 in turn, through the assembly of the movable block 4 and the base 3, it is possible to test whether each small lens 7 matches the image sensor 2 in turn, and each small lens 7 can also be used to test the performance of the image sensor 2. When replacing the lens, you only need to remove the insert 8 from the movable block 4, and then install another insert 8; when you want to replace the image sensor 2, you only need to disassemble the base 3 from the PCB mounting plate 1, and then install another The PCB mounting board 1 on which the image sensor 2 is mounted is fixed to the base 3 .

Of course, in this embodiment, only one insert 8 can be used, and a plurality of small lenses 7 can be inlaid on the insert 8 in turn, so as to realize the replacement of multiple small lenses.

In this embodiment, screws can be used to realize the detachable fixation of the base 3 and the PCB mounting plate 1 , and magnetic force can also be used to realize the movable assembly of the movable block 4 and the base 3 .

Because many small lenses are limited by size, it is not convenient to adjust the focus. Although tools can be used to adjust the focus of small lenses, it is inconvenient to use and the accuracy is low, so it is generally not used. The Xiang block 8 of this embodiment can be mounted on the movable block 4 by thread inlaying. At this time, the insert block 8 is rotated, and the distance between the insert block 8 and the image sensor 2 is adjusted by using the thread, that is, the focal length adjustment of the small lens 7 is realized. According to the existing small lens focusing requirements, the maximum adjustment distance of the insert 8 is 15mm, and the minimum can make the small lens 7 directly contact the surface of the image sensor 2 .

In addition, since the optical angle of the small lens 7 is generally small, in order to make the image without vignetting, the insert 8 should adopt a hollow circular frustum structure to avoid vignetting.

The movable block 4 and the base 3 of the above-mentioned embodiments are movable and fixed, so the relative position of the movable block 4 and the base 3 can be adjusted to adjust the relative position of the lens and the image sensor, so that the imaging produced by the lens can be accurately projected on the image sensor.

The image sensor and the PCB mounting board of the above-mentioned embodiments of the present invention are packaged using the prior art, and cannot be disassembled after being packaged. In order to improve the performance and save the cost, this invention proposes an improved packaging scheme.

As shown in Figure 7 and Figure 8, the packaging structure of this embodiment is that the image sensor 2 is directly packaged on the PCB mounting board 1 through the cob (chip on board) chip binding wire 22, and the lead wire is passed through the PLCC (plastlcleaded chip carrier) In the plastic chip carrier method, a transparent cover 21 is packaged above the image sensor 2, and the lens and the image sensor 2 can be detachably assembled during testing. The test device and assembly method of the interchangeable lens in this embodiment are similar to those in the foregoing embodiments, so details are not repeated here.

The above-mentioned transparent cover 21 is made of glass, and can also be made of transparent resin or plastic.

The above descriptions are only preferred embodiments of the present utility model, and are not therefore limiting the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the specification of the utility model and the contents of the accompanying drawings may be directly or indirectly used in Other relevant technical fields are all included in the patent protection scope of the present utility model in the same way.

Claims (10)

1. the proving installation of a lens changeable is used for the test of camera lens and imageing sensor, it is characterized in that:

Comprise movable block, base and PCB installing plate, described imageing sensor is mounted on the described PCB installing plate; Described base removably is fixed on the one side that described PCB installing plate is pasted with imageing sensor; Movable block and base are assembled movably, and described camera lens is inlayed and is installed on the movable block, with described image sensor alignment.

2. the proving installation of lens changeable according to claim 1 is characterized in that, also comprise and inserting, described camera lens inlay be installed in insert on, inserting to inlay is installed on the movable block, with described image sensor alignment.

3. the proving installation of lens changeable according to claim 2 is characterized in that, described inserting is hollow cylinder or hollow round platform, and camera lens is inlayed in the upper end, and the lower end is inlayed and is installed on the movable block.

4. according to the proving installation of any described lens changeable of claim 1 to 3, it is characterized in that described movable block is a planar structure, the middle part is provided with the movable block through hole, is used to inlay the described camera lens of installation.

5. the proving installation of lens changeable according to claim 4 is characterized in that, described movable block through hole inboard is provided with screw thread, and described screw thread matches with the external thread of camera lens, camera lens is inlayed be installed on the movable block.

6. according to the proving installation of any described lens changeable of claim 1 to 3, it is characterized in that described base is the square box structure, the one side that base contacts with movable block is provided with base plate through holes, described base plate through holes realizes printing opacity, and cooperatively interacts with described movable block through hole and to realize the location.

7. according to the proving installation of any described lens changeable of claim 1 to 3, it is characterized in that, described base and/or movable block adopt ferromagnetic metal to make and/or have magnet, and base and movable block adsorb mutually by magneticaction, realize assembling movably.

8. according to the proving installation of any described lens changeable of claim 1 to 3, it is characterized in that, also comprise at least one screw, realize between described base and the PCB installing plate removably fixing.

9. the proving installation of lens changeable according to claim 8 is characterized in that, described PCB installing plate is provided with at least one screw, and described base both sides are provided with at least one double-screw bolt, and the position of at least one double-screw bolt is corresponding with the position of at least one screw respectively; Screw is fixed described base and PCB installing plate by at least one double-screw bolt and at least one screw.

10. according to the proving installation of any described lens changeable of claim 1 to 3, it is characterized in that, described imageing sensor is encapsulated on the described PCB installing plate by the cob wiring, and encapsulates a transparency cover by the PLCC mode above described imageing sensor.

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