CN105721753B - Lens assembling method and lens assembling device - Google Patents
Lens assembling method and lens assembling device Download PDFInfo
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- CN105721753B CN105721753B CN201610187881.1A CN201610187881A CN105721753B CN 105721753 B CN105721753 B CN 105721753B CN 201610187881 A CN201610187881 A CN 201610187881A CN 105721753 B CN105721753 B CN 105721753B
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- lens group
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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Abstract
The invention provides a lens assembly method and a lens assembly device. The lens assembly method includes: placing the lens group into the fixing unit; controlling the lens group to move relative to the fixing unit by a control unit; providing, by a light source unit, detection light during the moving, the detection light being transmitted through the lens group; obtaining an image of the detection light transmitted through the lens group with a detection unit located at a first position; and when the image meets a predetermined condition, the control unit controls the lens group to stop moving at the second position.
Description
Technical Field
The present invention relates to the field of optical lenses, and more particularly, to a lens assembling method and a lens assembling apparatus using the same.
Background
In order to perform precise positioning control of the lens group, a Voice Coil Motor (VCM) that can stably move is generally used to move the lens group. The conventional voice coil motor generally includes a coil, a barrel, and a magnet. The coil is wound on the outer wall of the lens barrel, the magnet is opposite to the coil, and the lens barrel is used for accommodating the lens group. When the coil is electrified, an interaction force is generated between the coil and the magnet, and the interaction force drives the lens barrel to move along the optical axis of the lens group, so that the distance between the lens group and an image sensor for imaging by using the lens group is changed, and the zooming function is realized.
In a lens assembly process using a voice coil motor, the voice coil motor and the lens group need to be fixed to each other. In the case of the currently widely used screwless voice coil motor, it is desirable to provide a lens assembling method and a lens assembling apparatus capable of fixing the positions of the voice coil motor and the lens group to cover a desired auto-focusing range without an Active Alignment (AA) device, thereby achieving precise assembly of the lens group at low cost.
Disclosure of Invention
In view of the above, the present invention provides a lens assembling method and a lens assembling apparatus.
According to an embodiment of the present invention, there is provided a lens assembling method including: placing the lens group into the fixing unit; controlling the lens group to move relative to the fixing unit by a control unit; providing, by a light source unit, detection light during the moving, the detection light being transmitted through the lens group; obtaining an image of the detection light transmitted through the lens group with a detection unit located at a first position; and when the image meets a predetermined condition, the control unit controls the lens group to stop moving at the second position.
Further, a lens assembling method according to an embodiment of the present invention, further includes: fixing the lens group on the fixing unit after the image satisfies a predetermined condition.
Further, according to a lens assembling method of an embodiment of the present invention, wherein the detecting unit and the light source unit are located at both sides of the lens group, the detecting light is parallel light, and the predetermined condition is that the image is a minimum spot image of the parallel light.
Further, a lens assembling method according to an embodiment of the present invention, wherein obtaining an image of the detection light transmitted through the lens group with a detection unit located at a first position includes: reflecting the detection light transmitted through the lens group into reverse detection light via a reflection unit located at a third position; the reverse detection light is transmitted through the lens group again, and an image of the reverse detection light is obtained with the detection unit located at the first position.
Further, according to a lens assembling method of an embodiment of the present invention, wherein the detection unit and the light source unit are located on the same side of the lens group, the detection light is parallel light, and the predetermined condition is that the image is a spot image having the same spot section size as that of the detection light.
According to another embodiment of the present invention, there is provided a lens assembly apparatus including: a fixing unit for fixing the lens group; a control unit for controlling the lens group to move relative to the fixing unit; a light source unit for providing detection light during movement, the detection light being transmitted through the lens group; and a detection unit located at a first position for obtaining an image of the detection light transmitted through the lens group, wherein the control unit is configured to control the lens group to stop moving at a second position when the image satisfies a predetermined condition.
Further, a lens assembly apparatus according to another embodiment of the present invention, wherein the lens group is fixed on the fixing unit after the image satisfies a predetermined condition.
Further, according to a lens assembly apparatus of another embodiment of the present invention, wherein the detecting unit and the light source unit are located at both sides of the lens group, the detecting light is parallel light, and the predetermined condition is that the image is a minimum spot image of the parallel light.
Further, a lens assembly apparatus according to another embodiment of the present invention, further includes: a reflection unit at a third position for reflecting the detection light transmitted through the lens group into reverse detection light, wherein the reverse detection light is transmitted through the lens group again, the detection unit at the first position being configured to obtain an image of the reverse detection light.
Further, according to a lens assembly apparatus of another embodiment of the present invention, wherein the detection unit and the light source unit are located on the same side of the lens group, the detection light is parallel light, and the predetermined condition is that the image is a spot image having the same size as a cross section of the detection light.
According to the lens assembling method and the lens assembling device of the embodiment of the invention, the positions of the voice coil motor and the lens group can be fixed to cover the required automatic focusing range without an Active Alignment (AA) device, so that the accurate assembling of the lens group at low cost is realized.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and are intended to provide further explanation of the claimed technology.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail embodiments of the present invention with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings, like reference numbers generally represent like parts or steps.
Fig. 1 is a schematic view illustrating a lens assembly apparatus according to a first embodiment of the present invention.
Fig. 2 is a flowchart illustrating a lens assembling method according to a first embodiment of the present invention.
Fig. 3 is a schematic view illustrating a lens assembly apparatus according to a second embodiment of the present invention.
Fig. 4 is a flowchart illustrating a lens assembling method according to a second embodiment of the present invention.
Fig. 5 is a schematic view illustrating a lens apparatus assembled according to a lens assembling method of an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, exemplary embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a subset of embodiments of the invention and not all embodiments of the invention, with the understanding that the invention is not limited to the example embodiments described herein. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the invention described in the present disclosure without inventive step, shall fall within the scope of protection of the invention.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic view illustrating a lens assembly apparatus according to a first embodiment of the present invention. The lens assembly apparatus 1 is used for fixedly assembling the lens group 10 and the fixing unit 20.
As shown in fig. 1, a lens assembly apparatus 1 according to a first embodiment of the present invention includes a fixing unit 20, a control unit 30, a light source unit 40, and a detection unit 50.
Specifically, the fixing unit 20 is used to fix the lens group 10 to be assembled. The control unit 30 is used to control the lens group 10 to move relative to the fixed unit 20. The light source unit 40 is used to provide detection light during movement, which is transmitted through the lens group 10. The detecting unit 50 is located at a first position for obtaining an image of the detection light transmitted through the lens group 10. Further, when the image obtained by the detection unit 50 satisfies a predetermined condition while the control unit 30 is controlling the lens group 10 to move relative to the stationary unit 20, the control unit 30 controls the lens group 20 to stop moving at the second position.
In the first embodiment of the present invention as shown in fig. 1, the detecting unit 50 and the light source unit 40 are located at both sides of the lens group 10, and the detecting light is parallel light. After the detection light as parallel light passes through the lens group 10 in the process of moving the lens group 10 relative to the fixing unit 20, the image of the detection light obtained by the detection unit 50 changes as it moves. That is, the size of the spot image of the detection light obtained by the detection unit 50 changes with movement. When the image is the minimum spot image of the parallel light, the detecting unit 50 is located at the image-side focal point of the lens group 10. After the image is satisfied as the minimum spot image of the parallel light, if the lens group 10 is further moved close to the detection unit 50, the spot image of the parallel light will diverge accordingly. Therefore, in the first embodiment of the present invention, the predetermined condition is that the image is a minimum spot image of the parallel light.
After the predetermined condition is satisfied, the lens group 10 and the fixing unit 20 are fixed by dispensing, and an imaging unit for capturing an image by the lens group 10 may be disposed at the first position.
Fig. 2 is a flowchart illustrating a lens assembling method according to a first embodiment of the present invention. As shown in fig. 2, the lens assembling method according to the first embodiment of the present invention includes the following steps.
In step S201, the lens group is placed into the fixed unit. Thereafter, the process proceeds to step S202.
In step S202, the lens group is controlled by the control unit to move relative to the fixed unit. Thereafter, the process proceeds to step S203.
In step S203, during the movement, detection light is provided by the light source unit, the detection light being transmitted through the lens group. In the first embodiment of the present invention, the detection light is parallel light. Thereafter, the process proceeds to step S204.
In step S204, an image of the detection light transmitted through the lens group is obtained with the detection unit located at the first position. In the first embodiment of the present invention, the detection unit and the light source unit are located at both sides of the lens group. After the detection light as parallel light passes through the lens group during the movement of the lens group relative to the fixed unit, an image of the detection light obtained by the detection unit changes as it moves. Thereafter, the process proceeds to step S205.
In step S205, it is determined whether the image satisfies a predetermined condition. When the image is the minimum facula image of the parallel light, the detection unit is located at the image space focus of the lens group at the moment. After the image is satisfied as the minimum light spot image of the parallel light, if the lens group is further moved close to the detection unit, the light spot image of the parallel light will diverge accordingly. Therefore, in the first embodiment of the present invention, the predetermined condition is that the image is a minimum spot image of the parallel light.
If a negative result is obtained in step S205 and the image does not satisfy the predetermined condition, i.e., the image is not the minimum spot image of the parallel light, the process returns to step S202 to continue the control of the movement of the lens group with respect to the fixed unit by the control unit.
In contrast, if a positive result is obtained in step S205 and the image satisfies a predetermined condition that the image is the minimum spot image of the parallel light, the process proceeds to step S206.
In step S206, the control unit controls the lens group to stop moving at the second position. Thereafter, the process proceeds to step S207.
In step S207, the lens group is fixed to the fixing unit, thereby completing the assembly process of the lens group.
Above, a lens assembly apparatus and a lens assembly method thereof according to a first embodiment of the present invention are described with reference to fig. 1 and 2. Hereinafter, a lens assembling apparatus and a lens assembling method thereof according to a second embodiment of the present invention will be described with reference to fig. 3 and 4.
Fig. 3 is a schematic view illustrating a lens assembly apparatus according to a second embodiment of the present invention. The lens assembly device 3 is used for fixedly assembling the lens group 10 and the fixed unit 20.
As shown in fig. 3, the lens assembly apparatus 3 according to the second embodiment of the present invention includes a fixing unit 20, a control unit 30, a light source unit 40, a detection unit 50, and a reflection unit 60.
Specifically, the fixing unit 20 is used to fix the lens group 10 to be assembled. The control unit 30 is used to control the lens group 10 to move relative to the fixed unit 20. The light source unit 40 is used to provide detection light during movement, which is transmitted through the lens group 10. Unlike the lens assembly apparatus 1 according to the first embodiment of the present invention described with reference to fig. 1, the lens assembly apparatus 3 according to the second embodiment of the present invention further includes a reflection unit 60 located at a third position for reflecting the detection light transmitted through the lens group into reverse detection light. The reverse detection light is transmitted through the lens group 10 again, and the detection unit 50 located at the first position is configured to obtain an image of the reverse detection light. Further, when the image obtained by the detection unit 50 satisfies a predetermined condition while the control unit 30 is controlling the lens group 10 to move relative to the stationary unit 20, the control unit 30 controls the lens group 20 to stop moving at the second position.
In the second embodiment of the present invention as shown in fig. 3, the detecting unit 50 and the light source unit 40 are located on the same side of the lens group 10, and the detecting light is parallel light. The detection light as a parallel light is reflected by the reflection unit 60 at the third position after passing through the lens group 10 as a reverse detection light in the process of moving the lens group 10 with respect to the fixing unit 20. The image of the reverse detection light obtained by the detection unit 50 changes with movement. That is, the size of the spot image of the reverse detection light obtained by the detection unit 50 changes with movement. When the spot image of the reverse detection light is the same as the cross-sectional size of the detection light, the reflection unit 60 is located at the image-side focal point of the lens group 10. After satisfying that the spot image of the reverse detection light is the same as the sectional size of the detection light, if the lens group 10 is further moved close to the reflection unit 60, the spot image of the reverse detection light will diverge accordingly. Therefore, in the second embodiment of the present invention, the predetermined condition is that the image is a spot image of the same size as the cross-sectional size of the detection light.
After the predetermined condition is satisfied, the lens group 10 and the fixing unit 20 are fixed by dispensing, and an imaging unit for capturing an image by the lens group 10 may be disposed at the third position.
Fig. 4 is a flowchart illustrating a lens assembling method according to a second embodiment of the present invention. As shown in fig. 4, a lens assembling method according to a second embodiment of the present invention includes the following steps.
In step S401, the lens group is set in the fixed unit. Thereafter, the process proceeds to step S402.
In step S402, the lens group is controlled to move relative to the fixed unit by the control unit. Thereafter, the process proceeds to step S403.
In step S403, during the movement, detection light is provided by the light source unit, the detection light being transmitted through the lens group. In the first embodiment of the present invention, the detection light is parallel light. Thereafter, the process proceeds to step S404.
In step S404, the detection light transmitted through the lens group is reflected into reverse detection light by the reflection unit located at the third position. Thereafter, the process proceeds to step S405.
In step S405, an image of the reverse detection light transmitted again through the lens group is obtained with the detection unit located at the first position. In the second embodiment of the present invention, the detection unit and the light source unit are located on the same side of the lens group. The image of the reverse detection light obtained by the detection unit changes with movement after the detection light as parallel light passes through the lens group twice during the movement of the lens group relative to the fixed unit. Thereafter, the process proceeds to step S406.
In step S406, it is determined whether the image satisfies a predetermined condition. When the image is a spot image with the same size as the cross section of the detection light, the reflection unit is located at the image space focal point of the lens group. After the image is satisfied as a spot image having the same size as the cross-section of the detection light, if the lens group is further moved close to the reflection unit, the spot image of the reverse detection light will diverge. Therefore, in the second embodiment of the present invention, the predetermined condition is that the image is a spot image of the same size as the cross-sectional size of the detection light.
If a negative result is obtained in step S406 and an image does not satisfy a predetermined condition, i.e., the image is not the same as the spot cross-sectional size of the detection light, the process returns to step S402 to continue the control of the movement of the lens group relative to the fixed unit by the control unit.
In contrast, if a positive result is obtained in step S406 and the image satisfies a predetermined condition that the image is a spot image of the same size as the cross-sectional size of the detection light, the process proceeds to step S407.
In step S407, the control unit controls the lens group to stop moving at the second position. Thereafter, the process proceeds to step S408.
In step S408, the lens group is fixed to the fixing unit, thereby completing the assembly process of the lens group.
Above, a lens assembling method and a lens assembling apparatus according to an embodiment of the present invention are described with reference to fig. 1 to 4. Fig. 5 is a schematic view illustrating a lens apparatus assembled according to a lens assembling method of an embodiment of the present invention.
After the lens groups are fixed to the fixing unit using the lens assembly method according to the first embodiment of the present invention as described in fig. 1 and 2 or the lens assembly method according to the second embodiment of the present invention as described in fig. 3 and 4, the imaging unit 80 is placed at a position where the detecting unit (first embodiment) or the reflecting unit (second embodiment) is placed in the course of composition, and the circuit unit 90 is disposed at the lower end thereof for signal connection with the electronic device using the lens apparatus 5, thereby receiving a control signal from the electronic device and transmitting image data acquired via the imaging unit 80 to the electronic device. Further, as shown in fig. 5, between the fixed lens group 10 and the imaging unit 80, a filter unit 70 may be further disposed to further improve the imaging quality.
Above, a lens assembling method and a lens assembling apparatus according to embodiments of the present invention are described with reference to fig. 1 to 5, which can fix the positions of a voice coil motor and a lens group to cover a desired auto-focusing range without an Active Alignment (AA) device, thereby achieving precise assembly of the lens group at low cost.
It should be noted that, in the present specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that the series of processes described above includes not only processes performed in time series in the order described herein, but also processes performed in parallel or individually, rather than in time series.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present invention may be implemented by software plus a necessary hardware platform, and may also be implemented by hardware entirely. With this understanding in mind, all or part of the technical solutions of the present invention that contribute to the background can be embodied in the form of a software product, which can be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., and includes instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods according to the embodiments or some parts of the embodiments of the present invention.
The present invention has been described in detail, and the principle and embodiments of the present invention are explained herein by using specific examples, which are only used to help understand the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A lens assembly method, comprising:
placing the lens group into the fixing unit;
controlling the lens group to move relative to the fixing unit by a control unit;
providing, by a light source unit, detection light during the moving, the detection light being transmitted through the lens group;
obtaining an image of the detection light transmitted through the lens group with a detection unit located at a first position; and
the control unit controls the lens group to stop moving at a second position when the image satisfies a predetermined condition,
wherein the predetermined condition is that the image is a minimum spot image of the parallel light or the image is a spot image having the same spot cross-sectional size as the detection light.
2. The lens assembling method of claim 1, further comprising:
fixing the lens group on the fixing unit after the image satisfies a predetermined condition.
3. A lens assembling method according to claim 1 or 2, wherein
Under the condition that the detection unit and the light source unit are positioned at two sides of the lens group and the detection light is parallel light,
the predetermined condition is that the image is a minimum spot image of the parallel light.
4. The lens assembling method as claimed in claim 1 or 2, wherein obtaining the image of the detection light transmitted through the lens group using the detection unit located at the first position includes:
reflecting the detection light transmitted through the lens group into reverse detection light via a reflection unit located at a third position;
the reverse detection light is transmitted through the lens group again, and an image of the reverse detection light is obtained with the detection unit located at the first position.
5. The lens assembling method of claim 4, wherein
Under the condition that the detection unit and the light source unit are positioned at the same side of the lens group and the detection light is parallel light,
the predetermined condition is that the image is a spot image having the same spot cross-sectional size as the detection light.
6. A lens assembly apparatus, comprising:
a fixing unit for fixing the lens group;
a control unit for controlling the lens group to move relative to the fixing unit;
a light source unit for providing detection light during movement, the detection light being transmitted through the lens group; and
a detection unit located at a first position for obtaining an image of the detection light transmitted through the lens group,
wherein the control unit is configured to control the lens group to stop moving at the second position when the image satisfies a predetermined condition,
wherein the predetermined condition is that the image is a minimum spot image of the parallel light or the image is a spot image having the same spot cross-sectional size as the detection light.
7. The lens assembly apparatus as claimed in claim 6, wherein the lens group is fixed on the fixing unit after the image satisfies a predetermined condition.
8. The lens assembly apparatus as claimed in claim 6 or 7, wherein
Under the condition that the detection unit and the light source unit are positioned at two sides of the lens group and the detection light is parallel light,
the predetermined condition is that the image is a minimum spot image of the parallel light.
9. The lens assembly apparatus of claim 6 or 7, further comprising:
a reflection unit located at a third position for reflecting the detection light transmitted through the lens group as reverse detection light,
wherein the reverse detection light is transmitted through the lens group again, and the detection unit located at the first position is configured to obtain an image of the reverse detection light.
10. The lens assembly apparatus as claimed in claim 9, wherein the lens assembly apparatus
Under the condition that the detection unit and the light source unit are positioned at the same side of the lens group and the detection light is parallel light,
the predetermined condition is that the image is a spot image of the same size as a cross section of the detection light.
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| CN201610187881.1A CN105721753B (en) | 2016-03-29 | 2016-03-29 | Lens assembling method and lens assembling device |
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| CN201610187881.1A CN105721753B (en) | 2016-03-29 | 2016-03-29 | Lens assembling method and lens assembling device |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI625557B (en) * | 2017-07-11 | 2018-06-01 | 大立光電股份有限公司 | Annular optical element, imaging lens module and electronic device |
| CN107589513A (en) * | 2017-10-17 | 2018-01-16 | 歌尔股份有限公司 | Optics module assemble method and device |
| CN107589552B (en) * | 2017-10-17 | 2023-08-04 | 歌尔光学科技有限公司 | Optical module assembly equipment |
| CN107589512A (en) | 2017-10-17 | 2018-01-16 | 歌尔股份有限公司 | Optics module assemble method and device |
| CN107649875B (en) * | 2017-10-17 | 2024-05-10 | 歌尔光学科技有限公司 | Optical module assembly equipment and method |
| CN107855767B (en) * | 2017-10-17 | 2024-06-07 | 歌尔光学科技有限公司 | Optical module assembly equipment and method |
| CN107589514A (en) | 2017-10-17 | 2018-01-16 | 歌尔股份有限公司 | Optics module assemble method and device |
| CN109773474B (en) * | 2017-11-13 | 2021-07-13 | 宁波舜宇光电信息有限公司 | Assembling equipment and assembling method for optical assembly |
| CN112954146B (en) * | 2019-12-11 | 2022-10-28 | 余姚舜宇智能光学技术有限公司 | Camera module mounting equipment and mounting method thereof |
| CN110906881A (en) * | 2019-12-26 | 2020-03-24 | 上海广智光学实业有限公司 | Lens combination method for optical detection |
| TWI734535B (en) * | 2020-06-19 | 2021-07-21 | 新加坡商巴奇尼資本私人有限公司 | Active alignment system and active alignment method |
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