CN115774314A - Camera module and internal focusing optical lens thereof - Google Patents
Camera module and internal focusing optical lens thereof Download PDFInfo
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- CN115774314A CN115774314A CN202111047004.1A CN202111047004A CN115774314A CN 115774314 A CN115774314 A CN 115774314A CN 202111047004 A CN202111047004 A CN 202111047004A CN 115774314 A CN115774314 A CN 115774314A
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Abstract
The invention discloses a camera module and an internal focusing optical lens thereof, wherein the internal focusing optical lens comprises an object side lens group, a focusing lens group, an image side lens group and a shell, wherein the object side lens group is attached to the outer side of the shell, the image side lens group is fixedly arranged in the shell, the focusing lens group is arranged in the shell in a driving manner, and the object side lens group, the focusing lens group and the image side lens group are coaxial, so that the internal focusing optical lens integrates a focusing function.
Description
Technical Field
The present invention relates to optical imaging devices, and particularly to a camera module and an internal focusing optical lens thereof.
Background
In recent years, as a portable electronic device (for example, a smartphone) is required to be thinner, higher demands are being made on the imaging quality of an imaging module disposed in the portable electronic device. Whether according to focus can be adjusted categorised, the module of making a video recording includes focus camera module and fixed focus camera module, and the difference of both lies in whether being configured the driver that is used for driving optical lens along the optical axis direction motion of the module of making a video recording. Specifically, the zoom camera module is configured with a driver for driving the optical lens to move along the optical axis direction of the camera module to adjust the focal length of the zoom camera module, and the fixed focus camera module is not configured with the driver, so that the relative distance between the optical lens and the photosensitive chip cannot be adjusted. However, the fixed-focus camera module has a poor imaging capability, and cannot meet the requirement of people on the imaging quality of the front camera module.
Disclosure of Invention
An object of the present invention is to provide a camera module and an internal focusing optical lens thereof, wherein the camera module does not affect the total optical length of the internal focusing optical lens during the focusing process, thereby facilitating the reduction of the height and size of the camera module and realizing miniaturization, so that the camera module with focusing function can be applied to the front side of a portable electronic device as a front camera module.
An objective of the present invention is to provide a camera module and an inner focusing optical lens thereof, wherein the inner focusing optical lens provides an object side lens group, an image side lens group and a focusing lens group, the focusing lens group can be driven to move along the optical axis direction of the camera module, so as to realize the focusing of the camera module by changing the positions of the focusing lens group relative to the object side lens group and the image side lens group, and thus, during the focusing process, the positions of the object side lens group and the image side lens group relative to a photosensitive assembly are unchanged, so as not to affect the total optical length of the inner focusing optical lens.
An objective of the present invention is to provide a camera module and an inner focusing optical lens thereof, wherein the inner focusing optical lens provides a housing, and the focusing lens group is drivably retained in a housing space of the housing to allow the inner focusing optical lens to have an inner focusing function.
An object of the present invention is to provide a camera module and an inner focusing optical lens thereof, wherein the object-side lens group is attached to and protrudes from the housing, so as to allow the inner focusing optical lens to adopt a "small head" design scheme, and thus when the camera module is used as a front camera module of a portable electronic device, the object-side lens group can be closer to an opening position of a screen of the portable electronic device, thereby facilitating the camera module to obtain a larger field angle and a larger light transmission amount, so as to improve the imaging quality of the camera module.
An object of the present invention is to provide a camera module and an internal focusing optical lens thereof, wherein the internal focusing optical lens of the camera module adopts a "small head" design scheme, so that when the camera module is used as a front camera module of a portable electronic device, the size of an opening of a screen is not increased, and the requirement of opening miniaturization is met.
An object of the present invention is to provide a camera module and an inner focusing optical lens thereof, wherein the size of the object-side lens group is larger than that of the focusing lens group, so that the object-side lens group can be conveniently attached to the housing on the basis that the focusing lens group is drivably retained in the housing space of the housing, thereby making the structure of the camera module more reasonable.
An object of the present invention is to provide a camera module and an inner focusing optical lens thereof, wherein the inner focusing optical lens provides a driving unit, the driving unit allows the focusing lens group to be held in the housing space of the housing in a floating manner, and the driving unit is used for driving the focusing lens group to move along the optical axis direction of the camera module to realize focusing of the camera module.
An objective of the present invention is to provide a camera module and an inner focusing optical lens thereof, wherein a coil of the driving unit is sunk to facilitate reducing the height of the camera module, so that the camera module is suitable for portable electronic devices pursuing lightness and thinness.
An objective of the present invention is to provide a camera module and an optical lens for focusing therein, wherein the housing has at least one avoiding space for avoiding at least one extending arm of the driving unit, so that the focusing lens group has a larger stroke range, which is beneficial to improving the imaging effect of the camera module.
An object of the present invention is to provide a camera module and an internal focusing optical lens thereof, wherein the object-side lens group has an avoiding groove for avoiding a protrusion of the focusing lens group, so that the focusing lens group has a larger stroke range to facilitate improving an imaging effect of the camera module.
According to one aspect of the present invention, an inner focusing optical lens is provided, which includes:
an object side lens group;
a focus lens group;
an image side lens group; and
the focusing lens group is arranged in the shell in a driving mode, and the object side lens group, the focusing lens group and the image side lens group are coaxial.
According to an embodiment of the present invention, the inner-focusing optical lens further includes a driving unit, the driving unit includes a fixing portion, a carrying portion and a driving portion, wherein the fixing portion is disposed inside the housing or the fixing portion and the housing are integrally formed, wherein the carrying portion has a carrying outer side and a carrying inner side corresponding to the carrying outer side, the carrying outer side of the carrying portion extends outward to a position adjacent to the fixing portion, and the carrying inner side of the carrying portion extends inward to an upper side of the object-side lens group to keep the zoom lens group mounted on the carrying inner side of the carrying portion above the image-side lens group.
According to an embodiment of the present invention, the driving portion includes at least one magnet and at least one coil, the magnet is fixedly disposed on the fixing portion, the coil is fixedly disposed outside the bearing of the bearing portion, and the position of the magnet corresponds to the position of the fixing portion.
According to an embodiment of the present invention, the driving portion includes at least two of the magnets and one of the coils, at least one pair of the magnets being disposed oppositely, the coil being wound around the carrying outside of the carrying portion.
According to an embodiment of the invention, the height position of the load bearing outer side of the load bearing part is lower than the height position of the load bearing inner side.
According to an embodiment of the present invention, the carrying portion includes a driven ring, a carrying ring and at least one extension arm extending between the driven ring and the carrying ring, the driven ring forms the carrying outer side of the carrying portion, the carrying ring forms the carrying inner side of the carrying portion, and at least a portion of the extension arm is inclined so that a height position of the carrying outer side is lower than a height position of the carrying inner side.
According to an embodiment of the present invention, the extension arm of the carrying part has a lower side horizontally extending portion integrally extending inwardly from the driven member, an upper side horizontally extending portion integrally extending outwardly from the carrying ring, and an inclined extending portion having opposite ends respectively extending to and connected to the lower side horizontally extending portion and the upper side horizontally extending portion; or, the extension arm of the carrying part has a lower horizontal extension part and an inclined extension part, the lower horizontal extension part integrally extends inwards from the driven part, and two opposite ends of the inclined extension part respectively extend to and are connected with the lower horizontal extension part and the carrying ring; or, the extension arm of the bearing part has an inclined extension part and an upper horizontal extension part, the upper horizontal extension part integrally extends outwards from the bearing ring, and two opposite ends of the inclined extension part respectively extend to and are connected with the driven part and the upper horizontal extension part; alternatively, the extension arm of the carrying portion is entirely inclined.
According to one embodiment of the invention, the housing has at least one evacuation space for evacuating the carrying section.
According to an embodiment of the present invention, the housing has at least one avoiding space to avoid the extension arm of the carrying portion.
According to an embodiment of the invention, the inner-focus optical lens further includes a cover, a bottom side of the cover extends to the housing, and an inner side of the cover extends to the object-side lens group, so as to allow the cover to close the avoiding space.
According to an embodiment of the present invention, an outer diameter of the object side lens group is larger than an outer diameter of the focus lens group.
According to an embodiment of the present invention, the object side lens barrel of the object side lens group has an avoiding groove for avoiding the protrusion of the focusing lens barrel of the focusing lens group.
According to another aspect of the present invention, the present invention further provides a camera module, which includes a photosensitive element and an inner focusing optical lens disposed in a photosensitive path of the photosensitive element, wherein the inner focusing optical lens further includes:
an object side lens group;
a focus lens group;
an image side lens group; and
the focusing lens group is arranged in the shell in a driving mode, and the object side lens group, the focusing lens group and the image side lens group are coaxial.
Drawings
Fig. 1 is a perspective view of a camera module according to a first preferred embodiment of the invention.
Fig. 2A is a schematic cross-sectional view of the camera module according to the above preferred embodiment of the invention.
Fig. 2B is a schematic cross-sectional view of the camera module according to another direction in the above preferred embodiment of the invention.
Fig. 3A is a schematic cross-sectional view of a state of the camera module according to the above preferred embodiment of the invention.
Fig. 3B is a schematic cross-sectional view of another state of the camera module according to the above preferred embodiment of the invention.
Fig. 4A is an exploded view of a viewing angle of an optical lens of the camera module according to the above preferred embodiment of the invention.
Fig. 4B is an exploded view of another view angle of the inner-focus optical lens of the camera module according to the above preferred embodiment of the invention.
Fig. 5 is a schematic cross-sectional view of a modified embodiment of the camera module according to the above preferred embodiment of the invention.
Fig. 6 is a schematic cross-sectional view of another variant of the camera module according to the above preferred embodiment of the invention.
Fig. 7 is a perspective view of a camera module according to a second preferred embodiment of the invention.
Fig. 8 is a schematic cross-sectional view of the camera module according to the above preferred embodiment of the invention.
Fig. 9A is a schematic cross-sectional view of a state of the camera module according to the above preferred embodiment of the invention.
Fig. 9B is a schematic cross-sectional view of another state of the camera module according to the above preferred embodiment of the invention.
Fig. 10A is an exploded view of a viewing angle of an optical lens of the camera module according to the above preferred embodiment of the invention.
Fig. 10B is an exploded view of another view angle of the inner-focus optical lens of the camera module according to the above preferred embodiment of the present invention.
Fig. 11 is a schematic view illustrating an assembling process of the inner focusing optical lens of the camera module according to the above preferred embodiment of the present invention.
Detailed Description
Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including," "comprising," or "having" and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless specified or limited otherwise, the terms "mounted," "connected," "supported," and "coupled" and variations thereof are used broadly and encompass both direct mountings and indirect mountings, connections, supports, and couplings. Further, "connected" and "coupled" are not restricted to physical or mechanical connections or couplings.
Also, in the disclosure of the present invention, in the first aspect, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, which are merely for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms are not to be construed as limiting the present invention; in a second aspect, the terms "a" and "an" should be interpreted as meaning "at least one" or "one or more," i.e., in one embodiment, the number of an element can be one, and in another embodiment, the number of the element can be more than one, and the terms "a" and "an" should not be interpreted as limiting the number.
Referring to fig. 1 to 4B of the drawings of the present specification, a camera module according to a preferred embodiment of the present invention will be disclosed and described in the following description, wherein the camera module includes a photosensitive element 100 and an in-focus optical lens 200 disposed on the photosensitive element 100.
Specifically, referring to fig. 1 to 3B, the photosensitive assembly 100 includes a circuit board 101, a photosensitive chip 102, a lens base 103, and an optical filter 104, wherein the photosensitive chip 102 is attached to the circuit board 101, the lens base 103 is disposed on the circuit board 101 in a manner that the lens base 103 surrounds at least the periphery of a photosensitive area of the photosensitive chip 102, the optical filter 104 is attached to the top side of the lens base 103 in a manner that the optical filter 104 is maintained in a photosensitive path of the photosensitive chip 102, and the inner-focusing optical lens 200 is directly disposed on the lens base 103. Incident light rays can be received by the photosensitive chip 102 after sequentially passing through the inner focusing optical lens 200 and the optical filter 104 of the photosensitive assembly 100, so that subsequently, the photosensitive chip 102 can perform photoelectric conversion to form an image.
Preferably, the mirror base 103 is integrally formed with the circuit board 101, such that: on the one hand, need not set up the glue layer between the microscope base 103 and the circuit board 101 and can reduce the height dimension of module of making a video recording, on the other hand, the microscope base 103 can reinforce the intensity of circuit board 101, in order to guarantee the roughness of circuit board 101. Preferably, the mirror base 103 may further embed a portion of a non-photosensitive region of the photosensitive chip 102, such that the mirror base 103 is integrally coupled to the circuit board 101 and the photosensitive chip 102.
In addition, the photosensitive assembly 100 further includes at least one electronic component 105, wherein the electronic component 105 is attached to the circuit board 101, and the lens base 103 can embed the electronic component 105.
With continued reference to fig. 1 to 4B, the internal focusing optical lens 200 includes a housing 10, an object-side lens group 20, a focusing lens group 30 and an image-side lens group 40, wherein the housing 10 has a housing space 11 and a top opening 12 and a bottom opening 13 respectively communicating with the housing space 11, wherein the object-side lens group 20 is mounted on and protrudes from the housing 10 in such a manner that the object-side lens group 20 corresponds to the top opening 12 of the housing 10, wherein the focusing lens group 30 is drivably disposed in the housing space 11 of the housing 10 in such a manner that the focusing lens group 30 corresponds to the top opening 12 of the housing 10, wherein the image-side lens group 30 is fixedly disposed in the housing space 11 of the housing 10, and the lens object-side group 20, the focusing lens group 30 and the image-side lens group 40 are sequentially disposed along an optical axis direction of the internal focusing optical lens 200, such that the object-side lens group 20, the focusing lens group 30 and the image-side lens group 40 are integrated by the housing 10. In this way, the incident light can be received by the light sensing chip 102 after passing through the object side lens group 20, the focusing lens group 30, and the image side lens group 40 of the inner focusing optical lens 200, and the filter 104 of the light sensing assembly 100 in sequence.
It should be noted that the focusing lens group 30 is configured to move along the optical axis of the inner focusing optical lens 200 to realize focusing of the image capturing module by changing the positions of the focusing lens group 30 relative to the object side lens group 20 and the image side lens group 40, so that the positions of the object side lens group 20 and the image side lens group 40 relative to the photosensitive assembly 100 are not changed during focusing of the image capturing module, and the total optical length of the inner focusing optical lens 200 is not affected.
In other words, during the camera module focusing process, the positions and sizes of the exposed components of the inner focusing optical lens 200 are not changed, that is, the positions and sizes of the housing 10 and the object side lens group 20 of the inner focusing optical lens 200 are not changed, but focusing is achieved by changing the relative positions of the focusing lens group 30, so that the inner focusing optical lens 200 has an inner focusing function, thereby making the camera module particularly suitable for being a front camera module of a portable electronic device.
In particular, the size of the object-side lens group 20 is small, and the object-side lens group 20 is attached to the housing 10 in a manner of protruding from the housing 10, so as to allow the inner focusing optical lens 200 to adopt a design scheme of "small head", so that when the camera module is used as a front camera module of a portable electronic device, on one hand, the object-side lens group 20 can be closer to an opening position of a screen of the portable electronic device, so as to facilitate the camera module to obtain a larger angle of view and a larger amount of light transmission, thereby improving the imaging quality of the camera module, and on the other hand, the opening size of the screen is not increased, thereby satisfying the requirement of opening miniaturization.
The object-side lens group 20 includes an object-side lens barrel 21 and at least one object-side lens 22 mounted on the object-side lens barrel 21, wherein the object-side lens barrel 21 is attached to the housing 10 to attach the object-side lens group 20 to the housing 10. The focus lens group 30 includes a focus lens barrel 31 and at least one focus lens 32 mounted on the focus lens barrel 31. The image side lens group 40 includes an image side lens barrel 41 and at least one image side lens 42 mounted on the image side lens barrel 41, wherein the image side lens barrel 41 is fixedly mounted on the housing 10, so as to fixedly mount the image side lens group 40 in the housing space 11 of the housing 10.
Specifically, in this specific example of the image pickup module shown in fig. 1 to 4B, the object side lens group 20 includes one object side lens barrel 21 and two object side lenses 22, the two object side lenses 22 are disposed at intervals along the height direction of the object side lens barrel 21, the focusing lens group 30 includes one focusing lens barrel 31 and one focusing lens 32, the image side lens group 40 includes one image side lens barrel 41 and two image side lenses 42, and the two image side lenses 42 are disposed at intervals along the height direction of the image side lens barrel 41. In other words, in the specific example of the image capturing module shown in fig. 1 to 4B, the inner focusing optical lens 200 includes 5 lenses, which are the two object side lenses 22, the one focusing lens 32 and the two image side lenses 42.
The optical properties of the two object side lenses 22 of the object side lens group 20 may be different, and accordingly, the optical properties of the two image side lenses 42 of the image side lens group 40 may be different.
With continued reference to fig. 1 to 4B, the housing 10 includes a housing body 14 and a surrounding body 15, wherein the surrounding body 15 integrally extends downward from a periphery of the housing body 14 to form the housing space 11 between the housing body 14 and the surrounding body 15, wherein the housing body 14 is formed with the top opening 12, the surrounding body 15 defines the bottom opening 13, and wherein the object side barrel 21 of the object side lens group 20 is attached to the housing body 14 of the housing 10.
Preferably, the outer diameter of the object side lens group 20 is larger than the outer diameter of the focus lens group 30, so that the object side lens barrel 21 of the object side lens group 20 can be conveniently attached to the shell body 14 of the housing 10 on the basis that the focus lens group 30 is drivably retained in the shell space 11 of the housing 10, thereby making the structure of the camera module more reasonable.
Further, the housing 10 includes at least one mounting arm 16, wherein the mounting arm 16 integrally extends downward from an inner wall of the housing body 14 such that the mounting arm 16 is located in the housing space 11, and wherein the image side barrel 41 of the image side lens group 40 is mounted to the mounting arm 16 to fixedly dispose the image side lens group 40 in the housing space 11 of the housing 10.
It should be noted that the manner of attaching the image side barrel 41 of the image side lens group 40 and the attachment arm 16 of the housing 10 is not limited in the image pickup module of the present invention, and for example, the image side barrel 41 of the image side lens group 40 may be attached to the attachment arm 16 by means of, but not limited to, glue bonding.
Specifically, referring to fig. 4A and 4B, the mounting arm 16 of the housing 10 has at least one engaging slot 161, and the outer wall of the image side barrel 41 of the image side lens group 40 has at least one engaging protrusion 411, wherein the engaging protrusion 411 of the image side barrel 41 is engaged with the engaging slot 161 of the mounting arm 16 to mount the image side barrel 41 on the mounting arm 16, so as to fixedly dispose the image side lens group 40 in the housing space 11 of the housing 10. In addition, the locking protrusion 411 of the image side barrel 41 and the locking groove 161 of the mounting arm 16 are engaged with each other, so that the image side lens group 40 is prevented from rotating relative to the housing 10 in the housing space 11 of the housing 10, thereby ensuring the reliability of the inner focusing optical lens 200.
More specifically, the mounting arm 16 of the housing 10 is provided with a plurality of mutually spaced-apart locking grooves 161, and accordingly, the outer wall of the image side barrel 41 of the image side lens group 40 is provided with a plurality of mutually spaced-apart locking protrusions 411, wherein these locking protrusions 411 of the image side barrel 41 and these locking grooves 161 of the mounting arm 16 correspond one-to-one to ensure the reliability of the assembling relationship of the image side lens group 40 and the housing 10.
Alternatively, in another possible example of the image pickup module according to the present invention, the card slot 161 may be formed in the image side barrel 41, the locking protrusion 411 may be formed in the mounting arm 16, and the image side lens group 40 may be securely mounted to the housing 10 by fitting the locking protrusion 411 of the mounting arm 16 and the card slot 161 of the image side barrel 41 to each other.
With continued reference to fig. 1 to fig. 4B, the internal focusing optical lens 200 further includes a driving unit 50, for maintaining the focusing lens group 30 in the housing space 11 of the housing 10 in a floating manner and driving the focusing lens group 30 to move in the housing space 11 of the housing 10 along the optical axis direction of the camera module to achieve focusing of the camera module.
Specifically, the driving unit 50 includes a fixing portion 51, a carrying portion 52, at least one elastic sheet 53 and a driving portion 54. The fixing portion 51 is fixedly provided to the housing 10. The carrying portion 52 has a carrying outer side 5201 and a carrying inner side 5202 corresponding to the carrying outer side 5201, the carrying outer side 5201 of the carrying portion 52 extends to a position adjacent to the fixing portion 51, the carrying inner side 5202 of the carrying portion 52 extends to an upper side of the image side lens group 40, so as to allow the focus lens group 30 mounted on the carrying inner side 5202 of the carrying portion 52 to be held at the upper side of the image side lens group 40. The outer side of the elastic piece 53 extends to and is connected to the fixed portion 51, and the inner side of the elastic piece 53 extends to and is connected to the carrying outer side 5201 of the carrying portion 52, so that the elastic piece 53 allows the focus lens group 30 to be held in a floating manner in the housing space 11 of the housing 10. The driving portion 54 is disposed on the carrying outer side 5201 of the carrying portion 52 and is used for driving the carrying portion 52 to drive the focusing lens group 30 to move along the optical axis direction of the camera module, so as to realize the focusing of the camera module.
It should be noted that, when the camera module is not in operation, the fixing portion 51, the carrying portion 52 and the elastic sheet 53 make the focusing lens group 30 in a relatively stable state, and when the driving portion 54 drives the carrying portion 52 to drive the focusing lens group 30 to move upward along the optical axis direction of the camera module, the elastic sheet 53 is deformed upward synchronously, referring to fig. 3A, and correspondingly, when the driving portion 54 drives the carrying portion 52 to drive the focusing lens group 30 to move downward along the optical axis direction of the camera module, the elastic sheet 53 is deformed downward synchronously, referring to fig. 3B.
It should be noted that the number of the elastic pieces 53 of the inner-focus optical lens 200 of the present invention is limited, for example, in the specific example of the inner-focus optical lens 200 shown in fig. 1 to 4B, the driving unit 50 of the driving unit 50 includes one elastic piece 53, an outer side of the elastic piece 53 extends to and is mounted on a top side of the fixing portion 51, an inner side of the elastic piece 53 extends to and is mounted on a top side of the carrying outer side 5201 of the carrying portion 52, or an outer side of the elastic piece 53 extends to and is mounted on a bottom side of the fixing portion 51, and an inner side of the elastic piece 53 extends to and is mounted on a bottom side of the carrying outer side 5201 of the carrying portion 52. Alternatively, in other examples of the inner-focus optical lens 200, the driving unit 50 includes two spring plates 53, wherein an outer side of one spring plate 53 extends to and is mounted on a top side of the fixed portion 51, an inner side extends to and is mounted on a top side of the supporting outer side 5201 of the supporting portion 52, and an outer side of the other spring plate 53 extends to and is mounted on a bottom side of the fixed portion 51, and an inner side of the other spring plate extends to and is mounted on a bottom side of the supporting outer side 5201 of the supporting portion 52.
Alternatively, in another example of the camera module of the present invention, the driving unit 50 replaces the elastic sheet 53 with at least one ball, so that the focusing lens group 30 is held in the housing space 11 of the housing 10 in a floating manner. Specifically, the balls are held between the fixing portion 51 and the bearing portion 52, when the camera module is not in operation, the fixing portion 51, the bearing portion 52 and the balls make the focusing lens group 30 in a relatively stable state, and when the driving portion 54 drives the bearing portion 52 to drive the focusing lens group 30 to move along the optical axis direction of the camera module, the balls can roll, so that the bearing portion 52 moves more smoothly. Specifically, the fixing portion 51 is provided with at least one first recess for accommodating a portion of the ball, and correspondingly, the bearing portion 52 is provided with at least one second recess for accommodating a portion of the ball, so as to reliably retain the ball between the fixing portion 51 and the bearing portion 52 and avoid direct contact between the bearing portion 52 and the fixing portion 51.
With continued reference to fig. 1 to 4B, the driving portion 54 further includes at least one magnet 541 and at least one coil 542, wherein the magnet 541 is fixedly disposed on the fixing portion 51, the coil 542 is fixedly disposed on the carrying outer side 5201 of the carrying portion 52, and a position of the magnet 541 corresponds to a position of the coil 542, such that when the coil 542 is powered, a magnetic field generated by the coil 542 interacts with the magnet 541 to drive the carrying portion 52 to move relative to the fixing portion 51, and the carrying portion 52 can drive the focusing lens group 30 to move along an optical axis direction of the camera module to focus the camera module.
Preferably, the coil 542 of the driving portion 54 may be electrically connected to the circuit board 101 of the photosensitive assembly 100 to allow the circuit board 101 to supply power to the coil 542 of the driving portion 54.
Alternatively, in another example of the camera module according to the present invention, the magnet 541 of the driving portion 54 may be fixedly disposed on the carrying outer side 5201 of the carrying portion 52, and accordingly, the coil 542 may be fixedly disposed on the fixing portion 51, such that when the coil 542 is powered, the magnetic field generated by the coil 542 and the magnet 541 interact to drive the carrying portion 52 to move relative to the fixing portion 51, so that the carrying portion 52 can drive the focusing lens group 30 to move along the optical axis direction of the camera module to realize focusing of the camera module.
Preferably, the fixing portion 51 is in a ring shape and located outside the focus lens group 30, wherein the driving portion 54 includes two magnets 541, and the two magnets 541 are symmetrically disposed at two opposite sides of the fixing portion 51, so that the two magnets 541 can be symmetrically disposed outside the focus lens group 30. The bearing outer side 5201 of the bearing part 52 is annular and is located outside the focus lens group 30, wherein the driving part 54 includes one coil 542, and the coil 542 is wound around the bearing outer side 5201 of the bearing part 52, so that the coil 542 is annular and is located outside the focus lens group 20. With the above structure, when the coil 542 is powered, the magnetic field generated by the annular coil 542 interacts with the two symmetrically arranged magnets 541, so that the focusing lens group 30 can be driven by the carrying part 52 in a balanced manner to move along the optical axis direction of the image pickup module, so as to avoid the focusing lens group 30 from tilting when being driven, thereby ensuring the optical performance of the image pickup module. Preferably, the bearing portion 52 forms an annular winding slot 5203 on the bearing outer side 5201, wherein the coil 542 is wound around the winding slot 5203 of the bearing portion 52, so as to ensure that the coil 542 is fixedly disposed on the bearing outer side 5201 of the bearing portion 52. Moreover, the coil 542 is allowed to wind around the winding slot 5203 of the bearing part 52, so that the coil 542 can be prevented from protruding from the side wall of the bearing outer side 5201 of the bearing part 52, which is beneficial to reducing the length and width dimensions of the inner focus optical lens 200.
Alternatively, in another example of the inner-focus optical lens 200 according to the present invention, the driving unit 54 may include three or more magnets 541, for example, the driving unit 54 may include four magnets 541, and the magnets 541 are disposed on the fixing portion 51 so as to be spaced apart from each other and surround the focus lens group 30.
It should be noted that the assembly method of the magnet 541 and the fixing portion 51 of the driving portion 54 is not limited in the inner focus optical lens 200 of the present invention, and for example, the magnet 541 may be attached to an inner wall of the fixing portion 51 such that the magnet 541 is fixedly disposed in the fixing portion 51, or the fixing portion 51 may have at least one insertion groove 511 such that the magnet 541 is fixedly disposed in the fixing portion 51 so as to be inserted in the insertion groove 511.
Preferably, referring to fig. 1 to 4B, the fixing portion 51 surrounds the image side lens group 40, so that the two magnets 541 are symmetrically disposed on opposite sides of the image side lens group 40, and accordingly, the height position of the carrying outer side 5201 of the carrying portion 52 is lower than the height position of the carrying inner side 5202, so that the carrying portion 52 can make the coil 542 wound around the carrying outer side 5201 of the carrying portion 52 surround the image side lens group 40 and correspond to the position of the magnet 541 while ensuring that the focus lens group 30 is held on the upper side of the image side lens group 40, in such a way that the coil 542 of the driving unit 50 can sink down to facilitate reducing the height dimension of the image pickup module, thereby making the image pickup module suitable for portable electronic devices pursuing slimness.
Specifically, the carrying part 52 further includes a driven ring 521, a carrying ring 522 and at least one extension arm 523 extending between the driven ring 521 and the carrying ring 522, wherein the driven ring 521 forms the carrying outer side 5201 of the carrying part 52 to allow the coil 542 to wind around the driven ring 521, wherein the carrying ring 522 forms the carrying inner side 5202 of the carrying part 52 to allow the focusing lens group 30 to be fixedly mounted on the carrying ring 522, wherein the housing 10 has at least one movable channel 17 communicating with two opposite sides of the mounting arm 16, wherein the extension arm 523 of the carrying part 52 is movably held in the movable channel 17 of the housing 10, so that the driven ring 521 and the carrying ring 522 of the carrying part 52 can be respectively held at two opposite sides of the mounting arm 16 of the housing 10.
Preferably, referring to fig. 4A and 4B, the carrying part 52 includes two extension arms 523, which connect the driven ring 521 and the carrying ring 522 in a mutually symmetrical manner, and accordingly, the housing 10 has two moving channels 17, wherein each extension arm 523 of the carrying part 52 is movably held to each moving channel 17 of the housing 10. The width dimension of the movable channel 17 of the housing 10 is slightly larger than the width dimension of the extension arm 523 of the carrying portion 52, so that the extension arm 523 of the carrying portion 52 can be prevented from touching the mounting arm 16 of the housing 10 during the focusing process of the camera module.
Preferably, the driven ring 521, the carrying ring 5223 and the two extension arms 523 of the carrying part 52 may be of a unitary structure, such that one end of the two extension arms 523 extends to and is integrally connected to the driven ring 521, respectively, and the other end extends to and is integrally connected to the carrying ring 522, respectively.
Preferably, at least a part of the extension arm 523 of the bearing portion 52 is inclined, so that the height position of the bearing outer side 5201 of the bearing portion 52 can be lower than the height position of the bearing inner side 5202 to sink the coil 542 of the driving portion 54. In other words, the height position of the driven ring 521 of the mount 52 is lower than the height position of the carrier ring 522, and thus the mount 52 is disposed so that the driven ring 521 surrounds the image side lens group 40 and the carrier ring 522 is held on the upper side of the image side lens group 40.
Specifically, referring to fig. 1 to 4B, the extension arm 523 of the bearing part 52 has a lower horizontal extension portion 5231, an upper horizontal extension portion 5232 and an inclined extension portion 5233, wherein the lower horizontal extension portion 5231 integrally extends inward from the driven ring 521, the upper horizontal extension portion 5232 integrally extends outward from the bearing ring 522, and opposite ends of the inclined extension portion 5233 respectively extend to and are connected to the lower horizontal extension portion 5231 and the upper horizontal extension portion 5232, so that the height position of the driven ring 521 of the bearing part 52 is lower than the height position of the bearing ring 522 to sink the coil 542 of the driving part 54, thereby facilitating reduction of the height dimension of the camera module.
In an alternative example of the inner-focus optical lens 200 of the present invention, the extension arm 523 of the mount 52 is composed of the lower horizontally extending portion 5231 and the inclined extending portion 5233, wherein the lower horizontally extending portion 5231 integrally extends inward from the driven ring 521, and opposite ends of the inclined extending portion 5233 extend to and are connected to the lower horizontally extending portion 5231 and the mount ring 522, respectively.
In another alternative example of the inner-focus optical lens 200 of the present invention, the extension arm 523 of the carrying part 52 is composed of the upper horizontal extension portion 5232 and the inclined extension portion 5233, wherein the upper horizontal extension portion 5232 integrally extends outward from the carrying ring 522, and opposite ends of the inclined extension portion 5233 extend to and are connected to the upper horizontal extension portion 5232 and the driven ring 521, respectively.
In another alternative example of the inner-focus optical lens 200 of the present invention, the extending arm 523 of the bearing 52 is inclined as a whole, that is, opposite ends of the extending arm 523 extend to and are connected to the driven ring 521 and the bearing ring 522, respectively, in such a manner that the extending arm 523 is inclined as a whole.
Further, the driving unit 50 of the driving unit 50 includes a carrier 55, wherein the carrier 55 surrounds the focusing lens barrel 31 of the focusing lens group 30, and the carrier 55 is mounted on the carrying ring 522 of the carrying portion 52, and the carrier 55 fixedly mounts the focusing lens group 30 on the carrying portion 52.
With continued reference to fig. 1 to 4B, the housing 10 has at least one avoiding space 18, the avoiding space 18 communicates the housing space 11 and the top opening 12, wherein the extension arm 523 of the carrying portion 52 corresponds to the avoiding space 18 of the housing 10 to allow the housing 10 to avoid the extension arm 523 of the carrying portion 52, so that the focusing lens group 30 is allowed to have a larger stroke range. Preferably, the housing 10 has two avoidance spaces 18, the two avoidance spaces 18 are symmetrically formed on two opposite sides of the top opening 12, wherein each extension arm 523 of the bearing part 52 corresponds to each avoidance space 18 of the housing 10.
It should be noted that the width of the avoiding space 18 of the housing 10 is slightly larger than the width of the extending arm 523 of the carrying portion 52, so that when the focusing lens group 30 is driven to move along the optical axis direction of the camera module, the extending arm 523 of the carrying portion 52 can be prevented from touching the housing 10, so as to ensure the reliability of the camera module.
Further, the inner-focus optical lens 200 includes a cover 60, wherein the cover 60 has a central through hole 61, wherein the cover 60 is attached to the shell 14 of the housing 10 in such a manner that the object-side lens group 20 is retained in the central through hole 61 of the cover 60, and the cover 60 closes the avoiding space 18 of the housing 10, in such a manner that contaminants such as dust can be prevented from entering the inner-focus optical lens 200 through the avoiding space 18 of the housing 10 of the inner-focus optical lens 200, thereby ensuring the reliability of the inner-focus optical lens 200. Specifically, the lower side of the cover 60 extends to and is attached to the shell body 14 of the housing 10, and the inner side of the cover 60 extends to and is attached to the object-side barrel 21 of the object-side lens group 20, so as to allow the cover 60 to close the escape space 18 of the housing 10 and to allow the object-side lens group 20 to be held in the central through hole 61 of the cover 60.
Further, the inner focusing optical lens 200 includes a base 70, the base 70 has a light passage 71, wherein the base 70 is attached to the surrounding body 15 of the housing 10 in such a manner that the image side lens group 40 corresponds to the light passage 71 of the base 70, so that the housing 10, the object side lens group 20 and the base 70 form a general appearance of the inner focusing optical lens 200. The base 70 of the inner focusing optical lens 200 is attached to the lens seat 103 of the photosensitive assembly 100, so that the inner focusing optical lens 200 is disposed in the photosensitive path of the photosensitive assembly 100 to form the camera module.
With reference to fig. 1 to fig. 4B, the bottom side of the object-side barrel 21 of the object-side lens group 20 has an avoiding groove 211, the top side of the focusing barrel 31 of the focusing lens group 30 has a protrusion 311, the protrusion 311 of the focusing barrel 31 corresponds to the avoiding groove 211 of the object-side barrel 21, wherein when the image capturing module is focused, the protrusion 311 of the focusing barrel 31 can extend to the avoiding groove 211 of the object-side barrel 21 to allow the object-side lens group 20 to avoid the focusing lens group 30, and in this way, the focusing lens group 30 can have a larger stroke range to facilitate improving the imaging effect of the image capturing module.
Specifically, the bottom side of the object-side barrel 21 has an inner convex ring 212 and an outer convex ring 213, the avoiding groove 211 is formed between the inner convex ring 212 and the outer convex ring 213, and the avoiding groove 211 is annular. The inner convex ring 212 of the object-side barrel 21 extends downward to prevent stray light, and the outer convex ring 213 of the object-side barrel 21 extends downward to be adhered to the shell 14 of the housing 10. In the process of adhering the outer convex ring 213 of the object-side barrel 21 to the shell 14 of the housing 10 by using glue, the avoiding groove 211 of the object-side barrel 21 is used for accommodating overflowing glue, so that the avoiding groove 211 of the object-side barrel 21 has a function of collecting overflowing glue.
Fig. 5 shows a modified example of the camera module of the present invention, and unlike the camera module shown in fig. 1 to 4B, in this specific example of the camera module shown in fig. 5, the housing 10 and the fixing portion 51 of the driving unit 50 are of an integral structure. In other words, the magnet 541 of the driving portion 54 of the driving unit 50 can be directly and fixedly disposed on the housing 10, so that the length and width of the camera module can be further reduced, and the overall volume of the camera module can be reduced. The outer side of the elastic piece 53 is directly fixed to the housing 10.
Fig. 6 shows another modified example of the image pickup module according to the present invention, which is different from the image pickup module shown in fig. 1 to 4B in that, in the specific example of the image pickup module shown in fig. 6, the image side lens group 40 is fixedly disposed directly on the base 70, so that the relative positional relationship between the object side lens group 20 and the image side lens group 30 is ensured by the cooperation between the base 70 and the housing 10.
According to another aspect of the present invention, the present invention further provides an assembling method of the inner focusing optical lens 200, wherein the assembling method comprises the following steps:
(a) Allowing the object side lens group 20, the focus lens group 30, and the image side lens group 30 to be substantially coaxially disposed;
(b) Calibrating Z-direction gaps among the object side lens group 20, the focus lens group 30 and the image side lens group 40;
(c) Sequentially calibrating the XY-direction positions of the image side lens group 40, the focus lens group 30, and the object side lens group 20 from low to high in the sensitivity of the object side lens group 20, the focus lens group 30, and the image side lens group 40 in the entire inner focus optical lens 200; and
(d) Assembling the calibrated image side lens group 40, the focusing lens group 30 and the object side lens group 20 to obtain the inner focusing optical lens 200.
Preferably, the relative positions of the object side lens group 20 and the image side lens group 40 are relatively fixed by the housing 10, and the focus lens group 30 is held in the housing space 11 of the housing 10 in a floating manner by the driving unit 50 of the driving unit 50.
Preferably, in the above method, first, the Z-direction gap of the focus lens group 30 is adjusted with reference to the image side lens group 40, then, the Z-direction gap of the image side lens group 40 is corrected with reference to the image side lens group 40 and the focus lens group 30, then, the position of the focus lens group 30 in the ZY direction is corrected with reference to the image side lens group 40, and finally, the position of the object side lens group 20 in the XY direction is corrected with reference to the image side lens group 40 and the focus lens group 30.
It should be noted that the relationship among the object side lens group 20, the focus lens group 30 and the image side lens group 40 of the inner focus optical lens 200 is: (1) The Z-direction gap mainly affects the curvature of field of the inner focusing optical lens 200; (2) The position in the XY direction mainly affects the peak value of the inner-focus optical lens 200; (3) The tilt of the object side lens group 20, the focus lens group 30, and the image side lens group 40 mainly affects the tilt and astigmatism of the inner focus optical lens 200.
Therefore, when the inner focusing optical lens 200 is optically designed, it is necessary to balance the sensitivity of the overall optical performance of the inner focusing optical lens 200, that is, a specific lens or lens group is not so sensitive due to the relationship among the object side lens group 20, the focusing lens group 30 and the image side lens group 40, so that the overall optical performance of the inner focusing optical lens 200 is decreased due to the higher sensitivity of the lens or the lens group. However, due to the different actions and powers of the lenses, there are lens groups with sensitivity gradually increasing from low to high, and in general, the sensitivity of these lens groups increases in order from the image side to the object side, that is, the sensitivity of the focus lens group 30 is higher than that of the image side lens group 40, and the sensitivity of the object side lens group 20 is higher than that of the focus lens group 30. Therefore, in the assembly method of the present invention, after the Z-direction gaps of the object side lens group 20, the focus lens group 30, and the image side lens group 40 are calibrated, the XY-direction positions of the object side lens group 20, the focus lens group 30, and the image side lens group 40 need to be sequentially calibrated in a manner of decreasing sensitivity from high to low, so that the overall performance of the inner focus optical lens 200 is ensured.
Fig. 7 to 11 show a camera module according to a second preferred embodiment of the present invention, and one difference of the camera module shown in fig. 7 to 11 is that the focusing lens group 30 is only composed of the focusing lens 32, compared with the camera module shown in fig. 1 to 4B. In other words, in the specific example of the camera module shown in fig. 7 to 10, the focus lens 32 of the focus lens group 30 is directly mounted on the carrying ring 522 of the carrying portion 52. Preferably, the edge of the focusing lens 32 is provided with at least one clamping portion 321, so as to facilitate the clamping of the focusing lens 32 by a clamp through the clamping portion 321 of the focusing lens 32 when the focusing lens group 30 is assembled.
Another difference of the camera module shown in fig. 7 to 11, compared to the camera module shown in fig. 1 to 4B, is the assembly process of the inner focus optical lens 200. Specifically, the assembly process of the inner focus optical lens 200 of the camera module shown in fig. 7 to 11 includes the following stages:
pre-fixing a standard lens group 300 on the carrying ring 522 of the carrying part 52;
the carrying part 52 is movably disposed in the housing space 11 of the housing 10 in a manner that the standard lens group 300 corresponds to the avoiding space 18 of the housing 10, and at this time, the bottom surface of the standard lens group 300 is higher than the surface of the housing 14 of the housing 10, so as to allow the standard lens group 300 to be removed laterally in the following;
fixedly disposing the image side lens group 40 in the housing space 11 of the housing 10 and pre-fixing the image side lens group 40 to the housing 10, wherein the object side lens group 20, the standard lens group 300 and the image side lens group 40 are substantially coaxial;
calibrating the image side lens group 40, the standard lens group 300 and the object side lens group 20;
the standard lens group 300 is removed and the focusing lens group 30 is moved into the avoiding space 18 of the housing 10 to obtain the inner focusing optical lens 200.
In the process of assembling the inner focus optical lens 200, the standard lens group 300 is introduced to increase the overall threshold of the inner focus optical lens 200, so that the inner focus optical lens 200 can be adjusted under the high threshold.
Preferably, in the assembly process of the inner focusing optical lens 200, after the focusing lens group 30 replaces the standard lens group 300, the object-side lens group 20, the focusing lens group 30 and the image-side lens group 40 are calibrated again, which is beneficial to ensuring the optical performance of the inner focusing optical lens 200 and the imaging quality of the image capturing module.
Preferably, during the assembly of the inner focusing optical lens 200, the standard lens group 300 is removed by moving the standard lens group 300 in a direction perpendicular to the optical axis of the inner focusing optical lens 200 through the escape space 18 of the housing 10, and correspondingly, the focusing lens group 30 is moved in a direction perpendicular to the optical axis of the inner focusing optical lens 200 through the escape space 18 of the housing 10 into the focusing lens group 30.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.
Claims (13)
1. An inner focus optical lens, comprising:
an object side lens group;
a focus lens group;
an image side lens group; and
the focusing lens group is arranged in the shell in a driving mode, and the object side lens group, the focusing lens group and the image side lens group are coaxial.
2. The inner focusing optical lens of claim 1, further comprising a driving unit including a fixing portion, a carrying portion and a driving portion, wherein the fixing portion is disposed inside the housing or the fixing portion and the housing are integrally formed, wherein the carrying portion has a carrying outer side and a carrying inner side corresponding to the carrying outer side, the carrying outer side of the carrying portion extends outward to a position adjacent to the fixing portion, and the carrying inner side of the carrying portion extends inward to an upper side of the object-side lens group to keep the zoom lens group mounted on the carrying inner side of the carrying portion above the image-side lens group.
3. The inner-focus optical lens according to claim 2, wherein the driving part includes at least one magnet and at least one coil, the magnet is fixedly disposed on the fixing part, the coil is fixedly disposed outside the bearing of the bearing part, and the position of the magnet corresponds to the position of the fixing part.
4. The inner-focus optical lens according to claim 3, wherein the driving portion includes at least two magnets and a coil, at least one pair of the magnets being disposed oppositely, the coil being wound around the carrying outer side of the carrying portion.
5. The inner-focus optical lens as claimed in any one of claims 2 to 4, wherein a height position of the carrying outer side of the carrying portion is lower than a height position of the carrying inner side.
6. The inner focus optical lens as claimed in claim 5, wherein the carrying portion comprises a driven ring, a carrying ring and at least one extension arm extending between the driven ring and the carrying ring, the driven ring forms the carrying outer side of the carrying portion, the carrying ring forms the carrying inner side of the carrying portion, and at least a portion of the extension arm is inclined so that a height position of the carrying outer side is lower than a height position of the carrying inner side.
7. The inner-focus optical lens as claimed in claim 6, wherein the extension arm of the carrying portion has a lower horizontally extending portion integrally extending inwardly from the driven member, an upper horizontally extending portion integrally extending outwardly from the carrying ring, and an inclined extending portion having opposite ends respectively extending to and connected to the lower horizontally extending portion and the upper horizontally extending portion; or, the extension arm of the carrying part has a lower horizontal extension part and an inclined extension part, the lower horizontal extension part integrally extends inwards from the driven part, and two opposite ends of the inclined extension part respectively extend to and are connected with the lower horizontal extension part and the carrying ring; or, the extension arm of the bearing part has an inclined extension part and an upper horizontal extension part, the upper horizontal extension part integrally extends outwards from the bearing ring, and two opposite ends of the inclined extension part respectively extend to and are connected with the driven part and the upper horizontal extension part; alternatively, the extension arm of the carrying portion is entirely inclined.
8. The inner-focus optical lens as claimed in any one of claims 2 to 4, wherein the housing has at least one avoiding space to avoid the carrying part.
9. The inner focus optical lens as claimed in claim 6, wherein the housing has at least one avoiding space to avoid the extension arm of the carrying part.
10. The inner focusing optical lens of claim 8, further comprising a cover, wherein the bottom side of the cover extends to the housing, and the inner side of the cover extends to the object side lens group, so as to allow the cover to close the avoiding space.
11. The inner focus optical lens of claim 8, wherein an outer diameter of the object side lens group is larger than an outer diameter of the focus lens group.
12. The inner focusing optical lens of any one of claims 1 to 4, wherein the object side lens barrel of the object side lens group has an avoiding groove to avoid a protrusion of the focusing lens barrel of the focusing lens group.
13. A camera module, comprising:
a photosensitive assembly; and
the inner focus optical lens as claimed in any one of claims 1 to 12, wherein the inner focus optical lens is disposed in a photosensitive path of the photosensitive component.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111047004.1A CN115774314A (en) | 2021-09-07 | 2021-09-07 | Camera module and internal focusing optical lens thereof |
| PCT/CN2022/117238 WO2023036122A1 (en) | 2021-09-07 | 2022-09-06 | Optical drive assembly, optical lens and assembly method therefor, camera module, and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111047004.1A CN115774314A (en) | 2021-09-07 | 2021-09-07 | Camera module and internal focusing optical lens thereof |
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| Publication Number | Publication Date |
|---|---|
| CN115774314A true CN115774314A (en) | 2023-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111047004.1A Pending CN115774314A (en) | 2021-09-07 | 2021-09-07 | Camera module and internal focusing optical lens thereof |
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| CN (1) | CN115774314A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023241535A1 (en) * | 2022-06-13 | 2023-12-21 | 宁波舜宇光电信息有限公司 | Optical lens drive assembly and camera module thereof |
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2021
- 2021-09-07 CN CN202111047004.1A patent/CN115774314A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023241535A1 (en) * | 2022-06-13 | 2023-12-21 | 宁波舜宇光电信息有限公司 | Optical lens drive assembly and camera module thereof |
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