CN108873236B

CN108873236B - Optical system

Info

Publication number: CN108873236B
Application number: CN201810425973.8A
Authority: CN
Inventors: 胡朝彰; 翁智伟; 黄绍光; 宋欣忠
Original assignee: TDK Taiwan Corp
Current assignee: TDK Taiwan Corp
Priority date: 2017-05-12
Filing date: 2018-05-07
Publication date: 2022-06-24
Anticipated expiration: 2038-05-07
Also published as: CN208766376U; CN108873236A; CN108873228B; CN108873234A; CN207908778U; CN108873228A; CN208766374U; CN108873239A

Abstract

An embodiment of the disclosure provides an optical system, which includes a fixing portion, a first optical element carrier, a second optical element carrier, and a first driving assembly. The first optical element bearing piece is configured to bear a first optical element and is arranged on the fixing part. The second optical element bearing piece is configured to bear a second optical element and is movably connected with the first optical element bearing piece. The first driving component is configured to drive the first optical element carrier to move relative to the fixing part.

Description

Optical system

Technical Field

The present invention relates to an optical system, and more particularly, to an optical system having an optical anti-shake function and capable of compensating for an attitude difference.

Background

With the development of technology, many electronic devices (such as smart phones or tablet computers) have a function of taking pictures or recording videos. Through the camera module arranged on the electronic device, a user can operate the electronic device to extract various photos.

Generally, when the electronic device is used, the camera module therein is often shaken due to vibration, and the captured image is easily blurred. Therefore, the camera module of the electronic device can have the functions of automatic focusing and optical hand shock prevention. When the lens is automatically focused, the inner coil of the lens can act with the corresponding magnet after being electrified, so that the lens bearing seat which can be fixed with the coil can move along the optical axis direction (namely the Z-axis direction) of the lens to achieve the effect of automatic focusing, and the lens can be adjusted to the correct position (namely, the horizontal offset of the optical axis in the X-axis direction and the Y-axis direction is corrected) by respectively generating electromagnetic induction through the coil corresponding to the X axis and the Y axis and the magnet, thereby achieving the shockproof effect and obtaining better image quality.

However, when the electronic device is used, the shaking mode of the camera module inside the electronic device is actually more complicated, and the electronic device is not limited to the vertical direction and the horizontal direction. Therefore, it is desirable to provide a camera module and an electronic device with better anti-vibration effect.

Disclosure of Invention

The present invention provides an optical system to solve the above problems.

The embodiment of the invention discloses an optical system, which comprises a fixing part, a first optical element bearing piece, a second optical element bearing piece and a first driving assembly. The first optical element bearing piece is configured to bear a first optical element and is arranged on the fixing part. The second optical element bearing piece is configured to bear a second optical element and is movably connected with the first optical element bearing piece. The first driving component is configured to drive the first optical element carrier to move relative to the fixed part.

According to some embodiments of the present disclosure, the second optical element carrier, the second optical element and the fixing portion form a closed space, and the closed space is located between the second optical element and the photosensitive module. Furthermore, the first optical element is positioned between the second optical element and the fixing part.

According to some embodiments of the disclosure, the second optical element is fixedly connected to the fixing portion. Furthermore, the optical system further comprises an elastic element, and the first optical element bearing piece is movably connected with the fixing part through the elastic element. Furthermore, the elastic element has a strip-shaped structure, and the elastic element extends along a first optical axis direction of the first optical element to be connected to the base. Furthermore, when viewed from a direction perpendicular to the first optical axis, the elastic element partially overlaps the first optical element and the second optical element.

According to some embodiments of the present disclosure, the optical system further includes an optical path adjusting element, and the optical path adjusting element, the first optical element, and the second optical element are arranged along a first optical axis direction of the first optical element.

According to some embodiments of the present disclosure, the first driving assembly is configured to drive the first optical element carrier to move along a first optical axis direction of the first optical element.

According to some embodiments of the present disclosure, the first driving assembly is configured to control a distance between a first optical axis of the first optical element and a second optical axis of the second optical element. Furthermore, the first driving component is configured to control an included angle between a first optical axis of the first optical element and a second optical axis of the second optical element.

According to some embodiments of the present disclosure, the optical system includes a plurality of first optical elements disposed on the first optical element carrier. Furthermore, the optical system comprises a plurality of second optical elements arranged on the second optical element bearing piece. Furthermore, the size of the second optical elements is larger than that of the first optical elements. Furthermore, part of the first optical elements are made of plastic materials. Furthermore, part of the first optical elements are made of glass materials.

According to some embodiments of the present disclosure, the optical system further includes a second driving assembly for driving the second optical element carrier to move relative to the fixing portion. Moreover, the optical system also comprises a magnetic isolation element which is arranged between the first driving component and the second driving component.

According to some embodiments of the present disclosure, the optical system further includes a light amount control unit disposed between the first optical element carrier and the second optical element carrier.

The present disclosure provides an optical system including a first optical element carrier, a second optical element carrier, and a first driving assembly. The first optical element carrier and the second optical element carrier are configured to respectively carry a plurality of first optical elements and a plurality of second optical elements. In some embodiments, a portion of the first optical elements are made of a plastic material, and a plurality of the second optical elements are made of a glass material. Because the first optical element made of the plastic material is light in weight, the first driving component can effectively drive the first optical element bearing part and the first optical elements to move relative to the fixing part.

In addition, the first driving assembly is configured to drive the first optical element bearing member to move along the first optical axis direction and/or control a distance between a first optical axis of the plurality of first optical elements and a second optical axis of the plurality of second optical elements and/or control an included angle between the first optical axis and the second optical axis. Therefore, when the optical system is shaken, the first driving component can assist the first optical axis to be opposite to the second optical axis in time, so that the photosensitive module can generate clear digital images, and the purpose of optical hand shock prevention is achieved.

In some embodiments of the present disclosure, the optical system may further include a second driving assembly configured to drive the second optical element carrier to move along the first optical axis relative to the fixing portion. Therefore, the optical system can also perform focusing while performing the zoom function. In addition, in this embodiment, the optical system may further include a plurality of magnetic isolation elements disposed between the first driving assembly and the second driving assembly to avoid the problem of magnetic interference between the first driving assembly and the second driving assembly.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the principles of the disclosed embodiments. The features and advantages of the invention may be realized and obtained by means of the instruments and combinations particularly pointed out in the appended claims. These and other features of the present invention will become more fully apparent from the following description and appended claims, or may be learned by the practice of the invention as set forth hereinafter.

Drawings

Fig. 1 is a schematic diagram of an optical system according to an embodiment of the disclosure.

Fig. 2 is an exploded view of components of an optical system according to an embodiment of the present disclosure.

Fig. 3 shows a perspective cross-sectional view taken along line a-a' in fig. 1.

FIG. 4 is a cross-sectional view of an optical system according to another embodiment of the present invention.

FIG. 5 is a schematic diagram of an optical system according to an embodiment of the invention at another viewing angle.

Fig. 6 is a schematic diagram of the first optical element carrier, the base and the photosensitive module according to the embodiment of fig. 2.

Fig. 7 is a schematic diagram illustrating an amount of movement sensed by a sensing unit in an optical system according to an embodiment of the present invention.

Fig. 8 is a schematic diagram illustrating deviation of an optical axis of an optical system according to an embodiment of the present invention.

FIG. 9 is a diagram illustrating an optical system with an attitude difference according to an embodiment of the present invention.

FIG. 10 is a diagram of an optical system according to another embodiment of the present invention.

FIG. 11 is a diagram of an optical system according to another embodiment of the present invention.

FIG. 12 is a diagram of an optical system according to another embodiment of the present invention.

FIG. 13 is a diagram of an optical system according to another embodiment of the present invention.

The reference numbers are as follows:

100. 100A, 100B, 100C, 100D optical system

102 shell

1021 shell opening

103 outer frame

1023 the space

1031 notch

103P projection

104 inner frame

1041 opening

1043 groove

104A inner frame

104B inner frame

104P clamping structure

106 upper reed

1061 outer ring part

1062 middle ring part

1063 inner ring part

1064 connecting part

1065 connecting part

107 first optical component

108 first optical element carrier

1081 through hole

110 lower reed

112 second optical element carrier

1121 through hole

1122 storage tank

113 second optical component

114 circuit board

1143 electric contact

116 base

1161 opening a hole in the base

1163 optical filter

117 elastic element

118 circuit flat

120 photosensitive module

122 light quantity control unit

150 control unit

160 processor

170 storage unit

180 movable part

190 optical path adjusting element

200 optical system

202 optical module

204 optical module

A_g1First angle of rotation

A_g2Second angle of rotation

AM magnet

A_sIncluded angle

Ax first axial direction

Ay second axial direction

d₁、d₂Distance between two adjacent devices

DCL drive coil

ECS Enclosed space

F1 electromagnetic driving force

F2 electromagnetic driving force

L incident light

LS11, LS12, LS13 first optical element

LS21, LS22 second optical element

MBM magnetic isolation element

MEG1 first magnetic element

MEG2 second magnetic element

MEG3 third magnetic element

O1 first optical axis

O2 second optical axis

O3、O4、O_sOptical axis

SR1 first sensor

SR2 second sensor

SR3 third sensor

Z₁Z₄、Z_a(Vector)

Zc1, Zc2 compensate for distance

Detailed Description

In order to make the objects, features and advantages of the embodiments of the present disclosure more comprehensible, embodiments accompanied with figures are described in detail below. The configuration of the elements in the embodiments is for illustration and is not intended to limit the embodiments of the disclosure. And the reference numerals in the embodiments are partially repeated, so that the relevance between different embodiments is not intended for the sake of simplifying the description. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are directions with reference to the attached drawings only. Accordingly, the directional terminology used is intended to be illustrative and is not intended to be limiting of the disclosed embodiments.

Furthermore, relative terms, such as "lower" or "bottom" and "upper" or "top," may be used in embodiments to describe one element's relative relationship to another element as illustrated. It will be understood that if the device is turned over, with the top and bottom of the device reversed, elements described as being on the "lower" side will be turned over to elements on the "upper" side.

As used herein, the term "about" generally means within 20%, preferably within 10%, and more preferably within 5% of a given value or range. The amounts given herein are approximate, meaning that the meaning of "about" or "approximately" may still be implied without particular recitation.

Referring to fig. 1 to 3, fig. 1 is a schematic diagram of an optical system 100 according to an embodiment of the disclosure, fig. 2 is an exploded view of elements of the optical system 100 according to an embodiment of the disclosure, and fig. 3 shows a perspective cross-sectional view along a line a-a' in fig. 1. The optical system 100 may be a camera system having one or more driving components for carrying one or more optical elements (e.g., a lens), and the optical system 100 may be mounted on various electronic devices or portable electronic devices (e.g., a smart phone or a tablet computer) for a user to perform an image capturing function. In this embodiment, the driving component may be a Voice Coil Motor (VCM) with Auto Focusing (AF) function, but is not limited thereto. In some embodiments, the driving components of the Optical system 100 may also have auto-focusing, Optical Image Stabilization (OIS), static attitude difference (static) compensation, and dynamic attitude difference (dynamic) compensation functions.

Furthermore, as shown in fig. 1, the optical system 100 may also include a control unit 150, wherein the control unit 150 may include a processor 160 and a storage unit 170. In this embodiment, the processor 160 may be a microprocessor, and the storage unit 170 may be any type of storage medium (e.g., a random access memory) for storing data related to the optical system 100. The processor 160 in the control unit 150 may be configured to control the aforementioned driving components according to the data in the storage unit 170. The control unit 150 is not limited to the above embodiments, for example, the control unit 150 may also be a control chip.

Please refer to fig. 1 to fig. 3. In this embodiment, as shown in fig. 2, the optical system 100 includes a housing 102, an outer frame 103, an inner frame 104, an upper spring 106, a first optical assembly 107, a first optical element carrier 108, a driving coil DCL, a lower spring 110, a plurality of first magnetic elements MEG1, a plurality of second magnetic elements MEG2, a plurality of third magnetic elements MEG3, a plurality of elastic elements 117, a sensing unit, a circuit board 114, a circuit board 118, a second optical assembly 113, a second optical element carrier 112, a base 116, and a photosensitive module 120 (the control unit 150 is omitted in fig. 2). The housing 102, the circuit board 114, the circuit board 118 and the base 116 can be defined as a fixing portion. Furthermore, the first optical element carrier 108, the outer frame 103 and the inner frame 104 may define a movable portion that moves relative to the fixed portion.

As shown in fig. 2, the housing 102 has a hollow structure and is formed with a housing opening 1021, the base 116 is formed with a base opening 1161, the center of the housing opening 1021 corresponds to a first optical axis O1 of a first optical element LS11 in the first optical assembly 107, and the base opening 1161 corresponds to the photosensitive module 120 disposed below the base 116. The housing 102 may have a receiving space 1023 for receiving the upper spring 106, the outer frame 103, the inner frame 104, the first optical element carrier 108, the driving coil DCL, the second magnetic elements MEG2, the third magnetic element MEG3, and the circuit board 118. In this embodiment, the driving coil DCL, the first magnetic elements MEG1, the second magnetic elements MEG2, and the third magnetic element MEG3 may be defined as a first driving assembly, wherein the first driving assembly is electrically connected to the circuit board 114, and the first driving assembly is configured to drive the first optical element carrier 108 to move relative to the fixing portion.

As shown in fig. 2, the first optical element carrier 108 has a hollow ring structure and a through hole 1081, wherein a corresponding locking thread structure is disposed between the through hole 1081 and the first optical element 107, so that the first optical element 107 is locked in the through hole 1081. Similarly, the second optical element carrier 112 has a through hole 1121, wherein a corresponding locking thread structure is disposed between the through hole 1121 and the second optical element 113, so that the second optical element 113 is locked in the through hole 1121. In addition, the first optical element 107 includes a first optical element LS11, and the first optical element LS11 defines a first optical axis O1.

Furthermore, as shown in fig. 2, in this embodiment, the inner frame 104 has an opening 1041 and a plurality of recesses 1043, the opening 1041 is configured to receive the first optical element carrier 108, and the plurality of recesses 1043 is configured to receive the four second magnetic elements MEG 2. It is noted that the number of the grooves 1043 and the second magnetic elements MEG2 is not limited to this embodiment. In this embodiment, the second magnetic element MEG2 can have a long bar shape, but is not limited thereto, and for example, in other embodiments, the second magnetic element MEG can have a different shape. In addition, the second magnetic element MEG2 can be a multi-pole magnet.

As shown in fig. 2 and 3, the driving coil DCL is disposed around the first optical element carrier 108 and corresponds to the four second magnetic elements MEG 2. When the driving coil DCL is powered on, the four second magnetic elements MEG2 generate an electromagnetic driving force with the driving coil DCL, so as to drive the first optical element carrier 108 to move along the first optical axis O1 direction (Z-axis direction) relative to the inner frame 104 for Auto Focusing (Auto Focusing). In addition, as shown in fig. 2 and fig. 3, the first magnetic element MEG1 can be a flat coil disposed in the circuit board 118 and corresponding to the second magnetic element MEG 2.

As shown in fig. 2 and 3, the outer frame 103 surrounds the inner frame 104 and has four notches 1031, and the optical system 100 includes four elastic members 117 passing through the four notches 1031, respectively. Specifically, the elastic element 117 has a long strip structure extending along the first optical axis O1. One end of the elastic element 117 is connected to the outer frame 103 and the upper spring 106, and the other end is fixedly connected to the circuit board 118 and the second optical element carrier 112. In addition, the other end of the elastic member 117 may also be fixedly connected to the base 116. It should be noted that the elastic element 117 is connected to the first optical element carrier 108 through the upper spring 106, and there is no relative movement between the first optical element carrier 108 and the elastic element 117.

In this embodiment, the Circuit board 114 may be a Flexible Printed Circuit (FPC), but is not limited thereto. As shown in fig. 1 and 2, the circuit board 114 has a plurality of electrical contacts 1143 configured to connect a main circuit board (not shown) of the electronic device and the control unit 150. In addition, the circuit board 118 is disposed on the circuit board 114, and the first magnetic element MEG1 is electrically connected to the circuit board 114.

As shown in fig. 2 and 3, in this embodiment, the sensing unit may include two first sensors SR1, two second sensors SR2 and a third sensor SR 3. The plurality of first sensors SR1 and the second sensor SR2 can be fixedly disposed in a receiving groove 1122 of the second optical element carrier 112, but are not limited thereto, and for example, the plurality of first sensors SR1 and the second sensor SR2 can also be disposed on the circuit board 114 at a position corresponding to the first magnetic element MEG 1. The plurality of first sensors SR1 and the second sensor SR2 are configured to sense the movement of the corresponding second magnetic element MEG 2. In addition, the third sensor SR3 is disposed at a corner of the first optical element carrier 108 and configured to sense a magnet AM, wherein the magnet AM is fixedly disposed on the inner frame 104, corresponding to the third sensor SR3 on the first optical element carrier 108. The arrangement positions of the magnet AM and the third sensor SR3 are not limited to this embodiment. In this embodiment, the first sensor SR1, the second sensor SR2, or the third sensor SR3 can be a magnetic field sensing element, such as a Hall effect sensor (Hall effect sensor), a magneto-resistive sensor (MR sensor), or a magnetic flux sensor (Fluxgate), but is not limited thereto.

In this embodiment, the first optical element carrier 108 and the first optical assembly 107 are disposed in the inner frame 104 and are movable relative to the inner frame 104. More specifically, as shown in fig. 3, the first optical element carrier 108 may be suspended in the inner frame 104 by being connected to the inner frame 104 by the upper spring 106 and the lower spring 110, and the first optical element carrier 108 and the inner frame 104 are suspended in the outer frame 103 by the upper spring 106. In addition, based on the configuration of the four elastic elements 117 and the upper spring 106, when the first magnetic elements MEG1 are energized, the first magnetic elements MEG1 induce with the corresponding second magnetic elements MEG2 to generate an electromagnetic driving force, so as to drive the first optical element carrier 108, the inner frame 104, and the outer frame 103 to move along the X-Y plane relative to the circuit board 118. Therefore, when the Optical system 100 is shaken, the lens carrier 108 can be driven by the electromagnetic driving force to move on the X-Y plane, so as to achieve the purpose of Optical anti-shake (Optical Image Stabilization).

In this embodiment, as shown in fig. 3, the upper spring 106 and the lower spring 110 can be elastic elements, and the upper spring 106 can have an outer ring portion 1061, an intermediate ring portion 1062, an inner ring portion 1063, a plurality of connecting portions 1064 and connecting portions 1065. The inner ring 1063 is fixedly connected to the first optical element carrier 108, the middle ring 1062 is fixedly connected to the inner frame 104, and the outer ring 1061 is fixedly connected to the outer frame 103. Further, the inner ring portion 1063 is connected to the middle ring portion 1062 by a plurality of connecting portions 1065, and the middle ring portion 1062 is connected to the outer ring portion 1061 by a plurality of connecting portions 1064.

It should be noted that the outer ring portion 1061, the middle ring portion 1062 and the inner ring portion 1063 have larger elastic coefficients than the connecting portions 1064 and the connecting portions 1065, so that when the driving coil DCL is energized, the driving coil DCL induces an electromagnetic driving force with the second magnetic element MEG2 to drive the first optical element carrier 108 to move along the first optical axis O1 direction (Z-axis direction) relative to the inner frame 104, thereby ensuring that the first optical element carrier 108 cannot easily rotate relative to the inner frame 104. Furthermore, the lower spring 110 is configured to assist the first optical element carrier 108 to be suspended in the inner frame 104 more stably.

Furthermore, as shown in fig. 3, the first optical element 107 may include one or more first optical elements, such as a first optical element LS11, a first optical element LS12, and a first optical element LS 13. One or more second optical elements, such as a second optical element LS21 and a second optical element LS22, may be included in the second optical element 113. In this embodiment, the first optical elements and the second optical elements may be lenses, and the size of the second optical elements is larger than that of the first optical elements. For example, the size of the second optical element LS22 is larger than the size of the first optical element LS11 and the size of a first optical element LS 12. In this embodiment, a portion of the plurality of first optical elements is made of plastic, another portion of the plurality of first optical elements is made of glass, and the plurality of second optical elements is made of glass. For example, the first optical element LS11 and the first optical element LS12 are made of plastic material, and the first optical element LS13 is made of glass material. The material of the first optical element and the second optical element is not limited to this embodiment, for example, at least one of the plurality of second optical elements may be made of plastic material.

With continued reference to fig. 3, in this embodiment, the second optical element 113 is fixedly connected to the second optical element carrier 112, and the second optical element carrier 112 is fixedly connected to the base 116. That is, a plurality of second optical components among the second optical components 113 are fixedly connected to the fixing portion. Furthermore, as shown in fig. 2 and 3, the base opening 1161 of the base 116 may be provided with a filter 1163 configured to filter the light entering the optical system 100, and the second optical element carrier 112, the second optical element LS22 and the base 116 may form an enclosed space ECS. As shown in fig. 3, the closed space ECS is located between the second optical element LS22 and the photosensitive module 120. Due to the configuration of the closed space ECS, particles (particles) generated during the operation of the elements in the optical system 100 can be prevented from falling onto the photosensitive module 120.

Referring to fig. 4, fig. 4 is a cross-sectional view of an optical system 100A according to another embodiment of the invention. Compared to the optical system 100 of the previous embodiment, the optical system 100A of this embodiment may further include a light amount control unit 122 disposed between the first optical element carrier 108 and the second optical element carrier 112, and the light amount control unit 122 is configured to control the amount of light received by the light sensing module 120. As shown in fig. 4, when viewed from a direction perpendicular to the first optical axis O1 (e.g., along the Y-axis direction), the elastic element 117 partially overlaps the plurality of first optical elements and the plurality of second optical elements.

Referring to fig. 3 and 5, fig. 5 is a schematic diagram of the optical system 100 according to an embodiment of the invention at another viewing angle. The housing 102 is omitted from fig. 5 for clarity of illustration. As shown in fig. 3, a first axial direction Ax and a second axial direction Ay can be defined between the upper spring plate 106 and the lower spring plate 110, and are parallel to the X-axis direction and the Y-axis direction, respectively, and the first axial direction Ax and the second axial direction Ay are perpendicular to the first optical axis O1. More specifically, the first axial direction Ax and the second axial direction Ay intersect the first optical axis O1. It is noted that the first axial direction Ax and the second axial direction Ay pass through the first optical element carrier 108.

Furthermore, as shown in fig. 3 and 5, the control unit 150 in fig. 1 can only control the two second magnetic elements MEG2 and the third magnetic element MEG3 (coils) arranged along the Y-axis direction to generate two electromagnetic driving forces F1. The electromagnetic driving forces F1 are equal in magnitude and opposite in direction. Next, as shown in fig. 5, since the first optical element carrier 108 and the inner frame 104 are respectively connected to the inner ring portion 1063 and the middle ring portion 1062, when two electromagnetic driving forces F1 are generated, the inner frame 104 and the first optical element carrier 108 are driven to rotate around the first axial direction Ax with respect to the outer frame 103. That is, the inner ring portion 1063 and the middle ring portion 1062 rotate relative to the outer ring portion 1061 about the first axial direction Ax.

Similarly, as shown in fig. 5, the control unit 150 may control only the two second magnetic elements MEG2 and the two third magnetic elements MEG3 arranged along the X-axis direction to generate the two electromagnetic driving forces F2. The electromagnetic driving forces F2 are equal in magnitude and opposite in direction. As shown in fig. 5, the two electromagnetic driving forces F2 can drive the inner ring part 1063 and the middle ring part 1062 to rotate relative to the outer ring part 1061 about the second axial direction Ay. That is, the electromagnetic driving force F2 may drive the inner frame 104 and the first optical element carrier 108 to rotate relative to the outer frame 103 about the second axial direction Ay. It is noted that the control unit 150 may only control the first driving assembly to generate a single electromagnetic driving force F1 or a single electromagnetic driving force F2 to drive the first optical element carrier 108 and the inner frame 104 to rotate relative to the outer frame 103.

Referring to fig. 6, fig. 6 is a schematic view illustrating the first optical element carrier 108, the base 116 and the photosensitive module 120 according to the embodiment of fig. 2. Before the optical system 100 is mounted on the main circuit board and is not activated, the first optical axis O1 of the first optical element carrier 108 may be aligned with an optical axis O of the photosensitive module 120_sNot parallel, e.g. first optical axis O1 and optical axis O_sWill form an included angle A therebetween_s(inclination angle). This condition is called static attitude difference (static tilt) and may cause the image obtained by the photosensitive module 120 to be less sharp. Therefore, to compensate for the static attitude difference, the control unit 150 may control the second stageA driving assembly generates an electromagnetic driving force to rotate the first optical element carrier 108 clockwise (as shown in fig. 3) relative to the first axis Ax, thereby compensating for the tilted angle a_s。

Referring to fig. 2, fig. 3 and fig. 7, fig. 7 is a schematic diagram illustrating a moving amount sensed by a sensing unit in an optical system 100 according to an embodiment of the invention. In this embodiment, vector Z₁And vector Z₂Respectively represent the displacement of the two first sensors SR1 sensing the corresponding second magnetic element MEG2 along the Z-axis direction, and the vector Z₃And vector Z₄Respectively, represent the displacement amounts of the two second sensors SR2 sensing the corresponding second magnetic element MEG2 along the Z-axis direction. Vector Z_aRepresents the amount of displacement of the magnet AM sensed by the third sensor SR 3.

In this embodiment, vector Z₁Is smaller than the vector Z₂And vector Z₃Is smaller than the vector Z₄. Thus, the control unit 150 can be based on the vector Z₁To vector Z₄Obtain information about a first rotation angle of the first optical element carrier 108 and the inner frame 104 about the first axial direction Ax or a second rotation angle about the second axial direction Ay with respect to the outer frame 103. For example, by the distance d between the two second magnetic elements MEG2 along the Y-axis direction₁Vector Z₃And vector Z₄The first rotation angle A can be calculated_g1(according to trigonometric function formula). Then, the control unit 150 may drive the first optical element carrier 108 and the inner frame 104 to turn around the first axis Ax according to the obtained information about the first rotation angle. That is, the control unit 150 controls the vector Z₃The third magnetic element MEG3 generates an electromagnetic driving force toward the Z-axis direction to drive the first optical element carrier 108 and the inner frame 104 to rotate for a compensation distance Zc1, wherein Z is₄＝Z₃+Zc1。

Similarly, the control unit 150 may also be based on the vector Z₁And vector Z₂To obtain a second rotation of the first optical element carrier 108 about the second axial direction AyAngle A_g2And correspondingly drives the first optical element carrier 108 to rotate to compensate for the second rotation angle. In this embodiment, the control unit 150 can control the two second magnetic elements MEG2 according to the distance d between the two second magnetic elements MEG2 along the X-axis direction₂Vector Z₁And vector Z₂The second rotation angle A can be calculated_g2(according to trigonometric function formula). Then, the control unit 150 may drive the first optical element carrier 108 to turn around the second axial direction Ay according to the obtained information about the second rotation angle. That is, the control unit 150 controls the vector Z₁The third magnetic element MEG3 generates an electromagnetic driving force toward the Z-axis direction to drive the first optical element carrier 108 and the inner frame 104 to rotate for a compensation distance Zc2, wherein Z is₂＝Z₁+ Zc 2. After the first optical element carrier 108 and the inner frame 104 are driven to rotate by the two electromagnetic driving forces, the first optical axis O1 of the first optical element carrier 108 can be aligned with the optical axis O of the photosensitive module 120_sAnd aligning (figure 6) to further achieve the purpose of compensating the attitude difference.

Referring to fig. 2 and 8, fig. 8 is a schematic diagram illustrating an optical axis deviation of an optical system 100 according to an embodiment of the invention. For clarity of illustration, the outer frame 103, the inner frame 104, and the first optical element carrier 108 of the optical system 100 are shown as a movable portion 180. As shown in fig. 8, the optical system 100 may have a problem of optical axis deviation due to an error in assembly. That is, the first optical axes O1 of the first optical elements may not be aligned with a second optical axis O2 of the second optical elements, and the first optical axis O1 and the second optical axis O2 have a distance along the Y-axis direction, which makes the digital image generated by the photosensitive module 120 unclear.

In order to align the first optical axis O1 with the second optical axis O2, the control unit 150 can control the first magnetic element MEG1 and the second magnetic element MEG2 in the first driving assembly to generate an electromagnetic driving force along the Y-axis direction, so as to drive the movable portion 180 to move along the arrow direction (Y-axis direction) in fig. 8, and further align the first optical axis O1 with the second optical axis O2. Therefore, the first optical axis O1 and the second optical axis O2 can be in the same axial direction.

Referring to fig. 9, fig. 9 is a schematic diagram illustrating an optical system 100 having an attitude difference according to an embodiment of the invention. Fig. 9 shows only some of the elements in the optical system 100. Due to assembly errors, the first optical axes O1 of the first optical elements and the second optical axes O2 of the second optical elements may form an included angle a_sThis makes the digital image generated by the photosensitive module 120 unclear.

To compensate for the problem of the gesture difference, the control unit 150 can control the third magnetic elements MEG3 arranged along the Y-axis direction in the first driving assembly to generate two electromagnetic driving forces F1, so as to drive the first optical element carrier 108 to rotate around the first axial direction Ax relative to the outer frame 103, so that the first optical axis O1 is aligned with the second optical axis O2. In addition, in some embodiments, the optical system 100 may have problems of poor posture and optical axis deviation, and the control unit 150 may control the first driving assembly to drive the first optical element carrier 108 to move along the XY plane and rotate around the first axial direction Ax (or the second axial direction Ay) at the same time, so that the first optical axis O1 is aligned with and located in the same axial direction as the second optical axis O2.

Referring to fig. 10, fig. 10 is a schematic diagram of an optical system 100B according to another embodiment of the invention. In this embodiment, the movable portion 180 is located between the second optical element carrier 112 and the fixed portion (the base 116), i.e. the plurality of first optical elements are located between the plurality of second optical elements and the fixed portion.

Furthermore, the movable portion 180 is connected to the second optical element carrier 112 through a plurality of protruding portions. For example, four protrusions 103P (only two are shown) may be formed at four corners of the outer frame 103 in the movable portion 180, and four concave holes (not shown) may be correspondingly formed at the bottom of the second optical element carrier 112, so that the protrusions 103P can be engaged with the four concave holes.

Referring to fig. 11, fig. 11 is a schematic diagram of an optical system 100C according to another embodiment of the invention. As shown in fig. 11, the optical system 100C may have all elements in the optical system 100, compared to the optical system 100, and the optical system 100C further includes an optical path adjusting element 190. In this embodiment, the optical path adjusting element 190 may be a mirror configured to direct an incident light L entering along the-Z direction to a direction parallel to the first optical axis O1. The direction of the incident light L is not parallel to the direction of the first optical axis O1. In this embodiment, the optical path adjusting element 190, the plurality of first optical elements and the plurality of second optical elements are arranged along the first optical axis O1.

Referring to fig. 12, fig. 12 is a schematic diagram of an optical system 100D according to another embodiment of the invention. In this embodiment, the first optical element carrier 108 of the optical system 100D is suspended in an inner frame 104A by the upper spring 106, and the second optical element carrier 112 is suspended in an inner frame 104B by another upper spring 106. The inner frame 104A is disposed on the inner frame 104B through a locking structure 104P, and the inner frame 104B is disposed on the base 116. Furthermore, in this embodiment, the optical system 100D may further include a second driving component configured to drive the second optical element carrier 112 to move along the first optical axis O1 relative to the fixing portion (the base 116).

Similar to the first driving assembly, the second driving assembly may include a driving coil DCL disposed on the second optical element carrier 112 and one or more second magnetic elements MEG2 disposed on the inner wall surface of the inner frame 104B. Based on the structural design of this embodiment, the optical system 100D can also perform focusing while performing a zoom function. Furthermore, it should be noted that the optical system 100D may include one or more magnetic shielding elements MBM disposed between the first driving assembly and the second driving assembly to avoid the problem of magnetic interference between the first driving assembly and the second driving assembly.

It is noted that fig. 12 only shows some elements of the optical system 100D, and the embodiment of the first and second driving assemblies is not limited to this embodiment, and any first and second driving assemblies that can drive the first optical element carrier 108 and the second optical element carrier 112 to move along the first optical axis O1 are all within the scope of the embodiments of the present disclosure.

Referring to fig. 13, fig. 13 is a schematic diagram of an optical system 200 according to another embodiment of the invention. In this embodiment, the optical system 200 includes an optical module 202 and an optical module 204, and the

optical modules

202 and 204 are similar to the optical system 100. As shown in fig. 13, the optical module 202 has an optical axis O3, and the optical module 204 has an optical axis O4, wherein the optical axis O3 is parallel to the Z-axis direction, and the optical axis O4 is not parallel to the Z-axis direction. In order to enable the optical system 200 to obtain a clearer image, a driving assembly (similar to the aforementioned first driving assembly) in the optical module 204 may control the optical element bearing in the optical module 204 to rotate so that the optical axis O4 is parallel to the optical axis O3.

In summary, the present disclosure provides an optical system including a first optical element carrier 108, a second optical element carrier 112 and a first driving assembly. The first optical element carrier 108 and the second optical element carrier 112 are configured to respectively carry a plurality of first optical elements and a plurality of second optical elements. In some embodiments, a portion of the first optical elements are made of a plastic material and the second optical elements are made of a glass material. Since the first optical element made of plastic material has a light weight, the first driving assembly can effectively drive the first optical element carrier 108 and the plurality of first optical elements to move relative to the fixing portion.

In addition, the first driving assembly is configured to drive the first optical element carrier 108 to move along the first optical axis O1 and/or to control a distance between the first optical axes O1 of the plurality of first optical elements and the second optical axes O2 of the plurality of second optical elements and/or to control an included angle between the first optical axes O1 and the second optical axes O2. Therefore, when the optical system is shaken, the first driving assembly can instantly assist the first optical axis O1 to be aligned with the second optical axis O2, so that the photosensitive module 120 can generate clear digital images, thereby achieving the purpose of optical anti-shake.

In some embodiments of the present disclosure, the optical system may further include a second driving component configured to drive the second optical element carrier 112 to move along the first optical axis O1 relative to the fixing portion. Therefore, the optical system can perform focusing also at the same time when the zooming function is performed. In addition, in this embodiment, the optical system may further include a plurality of magnetic shielding elements MBM disposed between the first driving assembly and the second driving assembly to avoid the problem of magnetic interference between the first driving assembly and the second driving assembly.

Although the embodiments of the present disclosure and their advantages have been disclosed above, it should be understood that various changes, substitutions and alterations can be made herein by those skilled in the art without departing from the spirit and scope of the disclosure. Moreover, the scope of the present disclosure is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification, but it is to be understood that any process, machine, manufacture, composition of matter, means, method and steps, presently existing or later to be developed, that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized according to the present disclosure. Accordingly, the scope of the present disclosure includes the processes, machines, manufacture, compositions of matter, means, methods, and steps described above. In addition, each claim constitutes a separate embodiment, and the scope of protection of the present disclosure also includes combinations of the respective claims and embodiments.

Claims

1. An optical system, comprising:

a fixing part including a base, a filter and a photosensitive module;

a first optical element bearing member configured to bear a first optical element and arranged on the fixing part;

a second optical element bearing member configured to bear a second optical element and movably connected with the first optical element bearing member, wherein the first optical element is a lens; and

a first driving assembly configured to drive the first optical element bearing member to rotate around a first axial direction and/or a second axial direction relative to the fixing portion and the second optical element, wherein the first axial direction and the second axial direction are perpendicular to a first optical axis, and the first optical axis is an optical axis of the first optical element;

the optical system also comprises an elastic element, and the first optical element bearing piece is movably connected with the fixed part through the elastic element;

the elastic element is provided with a strip-shaped structure and extends along the first optical axis direction to be connected to the second optical element bearing piece;

when the optical element is observed from a direction perpendicular to the first optical axis direction, the elastic element is partially overlapped with the first optical element and the second optical element.

2. The optical system of claim 1, wherein the second optical element carrier, the second optical element and the fixing portion form an enclosed space, and the enclosed space is located between the second optical element and the photosensitive module.

3. The optical system of claim 2, wherein the first optical element is located between the second optical element and the fixed portion.

4. The optical system of claim 2, wherein the second optical element is fixedly connected to the fixed portion.

5. The optical system of claim 1, further comprising an optical path adjusting element, and the optical path adjusting element, the first optical element and the second optical element are arranged along the first optical axis direction.

6. The optical system of claim 1, wherein the first driving assembly is configured to drive the first optical element carrier to move along the first optical axis direction.

7. The optical system of claim 1, wherein the first drive assembly is configured to control a separation between the first optical axis of the first optical element and a second optical axis of the second optical element.

8. The optical system of claim 1, wherein the first driving assembly is configured to control an angle between the first optical axis of the first optical element and a second optical axis of the second optical element.

9. The optical system of claim 1, further comprising a plurality of first optical elements disposed on the first optical element carrier.

10. The optical system of claim 9, further comprising a plurality of second optical elements disposed on the second optical element carrier.

11. The optical system of claim 10, wherein a plurality of the second optical elements are larger in size than a plurality of the first optical elements.

12. The optical system of claim 9, wherein a portion of the plurality of first optical elements are made of plastic.

13. The optical system of claim 12, wherein a portion of the plurality of first optical elements are formed of glass.

14. The optical system of claim 1, further comprising a second driving assembly for driving the second optical element carrier to move relative to the fixed portion.

15. The optical system of claim 14, further comprising a magnetic isolation element disposed between the first and second driving assemblies.

16. The optical system of claim 1, further comprising a light amount control unit disposed between the first optical element carrier and the second optical element carrier.