CN115327743A

CN115327743A - Optical imaging system, camera module and electronic equipment

Info

Publication number: CN115327743A
Application number: CN202210779363.4A
Authority: CN
Inventors: 李盼; 黄庆跃; 郭书存; 傅饶; 韦程鹏; 薛梅
Original assignee: Kunshan Q Technology Co Ltd
Current assignee: Kunshan Q Technology Co Ltd
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2022-11-11
Also published as: CN219370111U; CN219370036U

Abstract

The invention discloses an optical imaging system, a camera module and an electronic device, wherein the system comprises: an imaging lens; an imaging chip; the prism comprises a first reflecting surface, a second reflecting surface and a third reflecting surface, light rays penetrating through the imaging lens are incident into the prism, are reflected by the first reflecting surface, the second reflecting surface and the third reflecting surface in the prism, are emitted out of the prism, and are projected to the imaging chip; or, the prism includes a first reflection surface and a second reflection surface, the light penetrating through the imaging lens is incident into the prism, reflected by the first reflection surface and the second reflection surface in the prism, emitted from the prism, and projected to the imaging chip. The long-focus lens can meet the requirement of simultaneously realizing the long focus under the condition of smaller thickness, and has a simple structure and smaller space occupation ratio.

Description

Optical imaging system, camera module and electronic equipment

Technical Field

The invention relates to the technical field of camera shooting, in particular to an optical imaging system, a camera shooting module and electronic equipment.

Background

Tele cameras typically have a relatively long focal length and are well suited for capturing scenes and objects at long distances. However, the telephoto camera has a contradiction between a large aperture and a thick thickness, and if a large aperture is to be obtained, the thickness is inevitably thick; if the thickness is to be reduced, the aperture size must be compressed.

The advent of portable devices such as smart phones, tablet computers or wearable devices has created a need for high resolution low profile cameras to be integrated into the devices. Accordingly, optical imaging systems with small-profile, high-quality tele cameras are desirable.

Disclosure of Invention

The invention provides an optical imaging system, a camera module and an electronic device, which can simultaneously realize a long focal length under the condition of smaller thickness, and have simple structure and smaller space occupation.

In order to achieve the above purpose, the technical solutions provided by the embodiments of the present invention are as follows:

in a first aspect, the present invention provides an optical imaging system comprising: an imaging lens; an imaging chip; a prism, an imaging lens; an imaging chip; the prism comprises a first reflecting surface, a second reflecting surface and a third reflecting surface, light penetrating through the imaging lens enters the prism, is reflected by the first reflecting surface, the second reflecting surface and the third reflecting surface in the prism, is emitted from the prism, and is projected to the imaging chip; or, the prism includes a first reflection surface and a second reflection surface, the light penetrating through the imaging lens is incident into the prism, is reflected by the first reflection surface and the second reflection surface in the prism, is emitted from the prism, and is projected to the imaging chip.

Preferably, the imaging chip and the imaging lens are on the same side relative to the prism.

Preferably, when the prism includes a first reflection surface, a second reflection surface, and a third reflection surface, the light passing through the imaging lens enters the prism, and after sequentially passing through the first reflection surface, the second reflection surface, and the third reflection surface in the prism, the light is emitted from the prism and projected to the imaging chip.

Preferably, the light passing through the imaging lens is incident into the prism from the second reflecting surface and is projected to the first reflecting surface, the light of the first reflecting surface is projected to the second reflecting surface, the light of the second reflecting surface is projected to the third reflecting surface, and the light of the third reflecting surface is projected to the imaging chip through the second reflecting surface; the imaging chip and the imaging lens are on the same side relative to the second reflecting surface.

Preferably, the second reflecting surface is perpendicular to the optical axis of the imaging lens, an included angle between the first reflecting surface and the second reflecting surface is an acute angle, and an included angle between the second reflecting surface and the third reflecting surface is an acute angle.

Preferably, the prism is a T-shaped prism.

In a second aspect, the present invention provides a camera module, including: a lens driving device, a prism fixing device and the optical imaging system according to any one of the first aspect, wherein the prism is fixed in the prism fixing device, and the prism fixing device is matched with the prism; the lens driving device is fixed between the imaging lens and the prism and used for driving the imaging lens to focus.

Preferably, the lens driving device further includes a lens anti-shake module, and the lens anti-shake module is configured to perform anti-shake control on the imaging lens.

Preferably, the imaging chip comprises a chip anti-shake module, and the chip anti-shake module is used for anti-shake control of the imaging chip.

In a third aspect, the present invention provides an electronic device, comprising: a camera module according to any of the preceding second aspects and one or more processors configured to process image signals generated from the camera module.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

according to the optical imaging system provided by the embodiment of the invention, the arrangement of the polygon prism and the imaging lens can enable light rays to be transmitted along the direction vertical to the optical axis of the imaging lens, so that the thickness of the lens of the structure is thinner, the thickness of the camera module is reduced, and the equipment is more miniaturized. Therefore, the optical imaging system can simultaneously realize long focal length under the condition of smaller thickness, and has simple structure and smaller space occupation.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an optical imaging system according to an embodiment of the present invention;

FIG. 2 is a simplified block diagram of a first exemplary optical imaging system according to an embodiment of the present invention;

FIG. 3 is a simplified diagram of a second exemplary optical imaging system according to an embodiment of the present invention;

FIG. 4 is a simplified diagram of a third exemplary optical imaging system according to an embodiment of the present invention;

FIG. 5 is a simplified diagram of a fourth exemplary optical imaging system according to embodiments of the present invention;

FIG. 6 is a simplified diagram of a fifth exemplary optical imaging system, according to an embodiment of the present invention;

FIG. 7 is a simplified diagram of a sixth exemplary optical imaging system, according to an embodiment of the present invention;

FIG. 8 is a simplified block diagram of an optical imaging system according to an embodiment of the present invention;

FIG. 9 is a schematic thickness diagram of an optical imaging system provided by an embodiment of the invention;

FIG. 10 is a schematic diagram of a thickness comparison of an optical imaging system provided by an embodiment of the invention;

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

FIG. 12 is a schematic diagram of a light distribution in an optical imaging system according to an embodiment of the present invention;

FIG. 13 is a field curvature diagram of a system provided by an embodiment of the invention;

FIG. 14 is a schematic diagram of a distortion curve of a system provided by an embodiment of the invention;

FIG. 15 is a schematic diagram of vertical axis chromatic aberration of a system provided by an embodiment of the invention;

FIG. 16 is a schematic diagram of relative illumination of a system according to an embodiment of the present invention;

FIG. 17 is a schematic diagram of the distribution of light in another optical imaging system provided by an embodiment of the invention;

FIG. 18 is a schematic view of a field curvature of a system provided by an embodiment of the invention;

FIG. 19 is a schematic diagram of a distortion curve of a system provided by an embodiment of the invention;

FIG. 20 is a schematic view of vertical axis chromatic aberration of a system provided by an embodiment of the invention;

FIG. 21 is a schematic diagram of relative illumination of a system according to an embodiment of the present invention;

fig. 22 is a schematic structural diagram of a camera module according to an embodiment of the present invention;

fig. 23 is a schematic structural diagram of a novel camera module according to an embodiment of the present invention;

fig. 24 is a perspective view of a periscopic camera module according to an embodiment of the present invention;

fig. 25 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

The embodiment of the application provides an optical imaging system, make a video recording module and electronic equipment, can satisfy and realize long focal length simultaneously under the condition of less thickness, and simple structure, space account for than littleer.

The technical scheme of the embodiment of the application has the following general idea:

an optical imaging system comprising: an imaging lens; an imaging chip; the prism comprises a first reflecting surface, a second reflecting surface and a third reflecting surface, light penetrating through the imaging lens enters the prism, is reflected by the first reflecting surface, the second reflecting surface and the third reflecting surface in the prism, is emitted from the prism, and is projected to the imaging chip; or, the prism comprises a first reflecting surface and a second reflecting surface, light penetrating through the imaging lens enters the prism, is reflected by the first reflecting surface and the second reflecting surface in the prism, is emitted from the prism, and is projected to the imaging chip.

In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.

In a first aspect, as shown in fig. 1, an embodiment of the present invention provides an optical imaging system, including:

an imaging lens 100; an imaging chip 302;

the prism includes a first reflection surface 202, a second reflection surface 201, and a third reflection surface 203, and the light passing through the imaging lens 100 enters the prism, is reflected by the first reflection surface 202, the second reflection surface 201, and the third reflection surface 203 in the prism, exits from the prism, and is projected to the imaging chip 302.

Or, the prism includes a first reflection surface 202 and a second reflection surface 201, and the light passing through the imaging lens 100 enters the prism, is reflected by the first reflection surface 202 and the second reflection surface 201 in the prism, exits from the prism, and is projected to the imaging chip 302.

Preferably, the imaging chip 302 and the imaging lens 100 may be on the same side with respect to the prism, so that the thickness of the optical imaging system is further reduced. It is understood that the imaging chip 302 and the imaging lens 100 are represented on the same side of the prism as the imaging chip: the imaging chip 302 and the imaging lens 100 are located on one side of the prism, for example: all on the left or right side of the prism, etc.

In an embodiment, when the prism includes the first reflection surface 202, the second reflection surface 201, and the third reflection surface 203, the light passing through the imaging lens 100 enters the prism, sequentially reflects from the prism through the first reflection surface 202, the second reflection surface 201, and the third reflection surface 203, and then exits the prism to be projected onto the imaging chip 302.

As an alternative embodiment, as shown in fig. 1, the light passing through the imaging lens 100 is incident into the prism from the second reflection surface 201 and is projected onto the first reflection surface 202, the light of the first reflection surface 202 is projected onto the second reflection surface 201, the light of the second reflection surface 201 is projected onto the third reflection surface 203, and the light of the third reflection surface 203 is projected onto the imaging chip 302 through the second reflection surface 201.

Wherein, the imaging chip 302 is on the same side of the imaging lens 100 opposite to the second reflection surface 201.

As another alternative embodiment, as shown in fig. 2, the light passing through the imaging lens 100 is incident into the prism and is projected onto the first reflection surface 202, the light of the first reflection surface 202 is projected onto the second reflection surface 201, the light of the second reflection surface 201 is projected onto the third reflection surface 203, and the light of the third reflection surface 203 is projected onto the imaging chip 302 through the second reflection surface 201.

As shown in fig. 3, the light passing through the imaging lens 100 enters the prism from the second reflection surface 201 and is projected onto the first reflection surface 202, the light of the first reflection surface 202 is projected onto the second reflection surface 201, the light of the second reflection surface 201 is projected onto the third reflection surface 203, and the light of the third reflection surface 203 is emitted from the prism and is projected onto the imaging chip 302.

In an embodiment, in order to meet the requirement of longer focal length, when the prism includes the first reflective surface 202, the second reflective surface 201, and the third reflective surface 203, the light passing through the imaging lens 100 is incident into the prism, and after multiple reflections by the first reflective surface 202, the second reflective surface 201, and the third reflective surface 203 in the prism, the light exits from the prism and is projected to the imaging chip 302.

As shown in fig. 4, the light transmitted through the imaging lens 100 enters the prism from the third reflection surface 203, is projected onto the first reflection surface 202, is sequentially projected onto the second reflection surface 201, the first reflection surface 202, the third reflection surface 203 and the second reflection surface 201 from the first reflection surface 202, and the light of the second reflection surface 201 exits the prism and is projected onto the imaging chip 302.

In an embodiment, when the prism includes the first reflection surface 202 and the second reflection surface 201, the light passing through the imaging lens 100 enters the prism, and is reflected by the first reflection surface 202 and the second reflection surface 201 in sequence in the prism, and then exits from the prism and is projected to the imaging chip 302.

As an alternative embodiment, as shown in fig. 5, the light passing through the imaging lens 100 is incident into the prism from the second reflection surface 201 and is projected onto the first reflection surface 202, the light of the first reflection surface 202 is projected onto the second reflection surface 201, and the light of the second reflection surface 201 is emitted from the prism and is projected onto the imaging chip 302. Wherein.

As another alternative embodiment, as shown in fig. 6, the light passing through the imaging lens 100 is incident into the prism and is projected onto the first reflection surface 202, the light of the first reflection surface 202 is projected onto the second reflection surface 201, and the light of the second reflection surface 201 is emitted from the prism and is projected onto the imaging chip 302.

In an embodiment, in order to meet the requirement of longer focal length, when the prism includes the first reflection surface 202 and the second reflection surface 201, the light passing through the imaging lens 100 is incident into the prism, and after multiple reflections by the first reflection surface 202 and the second reflection surface 201 in the prism, the light exits from the prism and is projected to the imaging chip 302.

As shown in fig. 7, the light passing through the imaging lens 100 enters the prism, is projected onto the first reflective surface 202, is projected onto the second reflective surface 201 from the first reflective surface 202, is projected onto the first reflective surface 202 from the second reflective surface 201, is projected onto the second reflective surface 201 from the first reflective surface 202, and the light of the second reflective surface 201 exits the prism and is projected onto the imaging chip 302.

Of course, the present application may also include other embodiments, which are not illustrated herein.

As shown in fig. 8, which is a schematic diagram of the structure, light emitted from the light-passing hole enters the prism from the incident surface of the prism, and the light entering the prism is transmitted in a direction perpendicular to the optical axis of the imaging lens 100 and finally projected onto the imaging chip 302.

Wherein, the imaging lens 100 can be 1, 4, 5, etc. Taking 4 sheets as an example for explanation, as shown in fig. 1, the imaging lens 100 includes a first lens 101, a second lens 102, a third lens 103, and a fourth lens 104, and a diaphragm 105 is further included between the second lens 102 and the third lens 103.

In some embodiments, the first reflective surface 202 and the third reflective surface 203 are coated with a reflective film, so the first reflective surface 202 and the third reflective surface 203 can reflect light at the respective surfaces. The second reflective surface 201 may project light or pass light through a corresponding surface, and the second reflective surface 201 may reflect light under the phenomenon of total internal reflection. Total internal reflection can occur when the angle of incidence of light is near or above a certain critical angle, where the angle of incidence refers to the angle between light incident on a surface and the normal to the surface at the point of incidence. Accordingly, when the incident angle of light is less than the critical angle, the second reflective surface 201 of the prism may pass the light, whereas when the incident angle of the light is close to or greater than the critical angle, the second reflective surface 201 of the prism may reflect the light at the corresponding surface.

It should be noted that the critical angle here is related to the refractive index of the material of the second reflecting surface 201, and therefore, the magnitude of the critical angle can be adjusted by changing the type of the material of the second reflecting surface 201.

In one embodiment, the second reflecting surface 201 is perpendicular to the optical axis of the imaging lens, and as shown in fig. 3, an included angle θ 1 between the second reflecting surface 201 and the first reflecting surface 202 is an acute angle, and an included angle θ 2 between the second reflecting surface 201 and the third reflecting surface 203 is an acute angle. For example, an included angle θ 1 between the second reflecting surface 201 and the first reflecting surface 202 and an included angle θ 2 between the second reflecting surface 201 and the third reflecting surface 203 are both between 10 degrees and 80 degrees.

Preferably, in order to achieve a good projection effect, all the light rays projected from the first reflection surface 202 to the second reflection surface 201 can be reflected by the second reflection surface 201 to the third reflection surface 203, and an included angle θ 1 between the second reflection surface 201 and the first reflection surface 202 and an included angle θ 2 between the second reflection surface 201 and the third reflection surface 203 may be 30 degrees.

As other alternative embodiments, the second reflecting surface 201 may not be perpendicular to the optical axis of the imaging lens, the included angle θ 1 between the second reflecting surface 201 and the first reflecting surface 202 is an acute angle, and the included angle θ 2 between the second reflecting surface 201 and the third reflecting surface 203 is an acute angle. That is, an included angle exists between the normal of the second reflecting surface 201 and the optical axis of the imaging lens, and the included angle is smaller than the aforementioned critical angle, so that the light can be projected to the first reflecting surface 202 through the second reflecting surface 201.

Preferably, as shown in fig. 8, the prism provided herein may be a T-shaped prism 200. It should be noted that the T-shaped prism 200 has a smaller thickness than a triangular prism having the same θ 1 angle and θ 2 angle, and thus has a better effect.

The T-shaped prism 200 may be integrally formed or formed by bonding two triangular prisms.

Of course, as other alternative embodiments, the prism may also be a triangular prism, that is, the triangular prism is composed of the second reflecting surface 201, the first reflecting surface 202, and the third reflecting surface 203, or the prism is a quadrangular prism, a pentagonal prism, or the like.

For example, the second reflecting surface 201, the first reflecting surface 202, and the third reflecting surface 203 are all flat surfaces, the second reflecting surface 201, the first reflecting surface 202, and the third reflecting surface 203 are all spherical surfaces, and the second reflecting surface 201, the first reflecting surface 202, and the third reflecting surface 203 are all free-form surfaces, or the second reflecting surface 201 is a flat surface, the first reflecting surface 202 is a spherical surface, and the third reflecting surface 203 is a free-form surface, and the like, which is not limited in the present application.

The prism may be made of glass, resin, or the like.

Specifically, as shown in fig. 1, the optical imaging system further includes an optical filter 301, and the light reflected from the third reflecting surface 203 is projected to the optical filter 301 through the second reflecting surface 201, and then projected to the imaging chip 302 through the optical filter 301.

The optical filter 301 may be an infrared filter 301, and the optical filter 301 may be a glass plate coated with an infrared reflective film, which can filter out infrared light to reduce the influence of unwanted light on imaging.

As shown in fig. 9, the present application provides an optical imaging system in which the length from the first mirror 101 to the lowest part of the prism (also roughly the vertical distance of the light from the first mirror 101 to the first reflecting surface 202 of the prism) is Z1, the length from the imaging chip 302 to the lowest part of the prism is Z2, and Z2 is less than or equal to Z1, where Z1 is much smaller than the conventional length (i.e., the length from the first mirror to the imaging chip).

Fig. 10 shows a comparison between the conventional light distribution and the light distribution in the present application in a certain scene, and it can be seen that the Z height of the optical imaging system in the present application is shortened by 7.11mm compared with the conventional light distribution.

Thus, based on the prism structure provided above, the specific direction of the light is: the light emitted from the light through hole is incident into the prism through the incident surface of the prism, and the light is reflected, totally reflected and reflected in the prism in sequence, finally refracted to pass through the optical filter 301 and reach the imaging chip 302, wherein at least one total reflection occurs.

As another alternative embodiment, as shown in fig. 11, the optical imaging system provided in the present application may further include a fourth reflection surface 204, that is, the light projected from the first reflection surface 202 to the second reflection surface 201 is projected to the fourth reflection surface 204, projected from the fourth reflection surface 204 to the second reflection surface 201, and projected from the second reflection surface 201 to the third reflection surface 203.

Specifically, the specific direction of the light is as follows: the light emitted from the light-passing hole is incident into the prism through the incident surface of the prism, the light is reflected, totally reflected, totally reflected and reflected in the prism in sequence, and finally refracted to reach the imaging chip 302 after passing through the optical filter 301, wherein the total reflection is performed at least twice.

The following table 1 gives lens structure data for an exemplary system:

TABLE 1

The lens performance parameters for the corresponding system are given in table 2 below:

TABLE 2

Fig. 12 is a schematic diagram showing the distribution of light rays in the system with the lens structure data and lens performance parameters.

In the application scene, an optical imaging system is matched with a 1/2' chip, the focal length is designed to be 16mm, the equivalent focal length is 86.53mm, the relative equivalent focal length can be 25mm, the main shooting 3.5X optical zooming can be realized, meanwhile, the Z1 is controlled to be 8.9mm, and the height of the lens Z in the conventional scheme is more than 15 mm. Therefore, compared with the traditional system, the scheme has obvious advantages.

Fig. 13 shows a field curvature diagram of the system, in which the abscissa represents the value of field curvature, the ordinate represents the field angle, the solid line represents the meridional field curvature, and the dashed line represents the sagittal field curvature, and it can be seen from the diagram that the maximum value of field curvature is less than 0.07mm, and the field curvature of the system is better optimized.

Fig. 14 shows a schematic diagram of a distortion curve of the system, in which the abscissa represents the distortion value and the ordinate represents the field angle, and it can be seen from the diagram that the maximum distortion value is less than 5%, and the distortion correction of the system is better.

Fig. 15 shows a schematic diagram of vertical axis chromatic aberration of the system, in which the abscissa represents the magnitude of chromatic aberration and the ordinate represents the field angle, and it can be known that the vertical axis chromatic aberration of the system is less than 0.0016mm, the chromatic aberration correction effect is good, and the color cast problem does not occur in the photographing result.

Fig. 16 is a schematic diagram showing the relative illuminance of the system, where the abscissa is the angle of view and the ordinate is the relative illuminance value, and it is understood from the figure that the relative illuminance of the system is 80% or more at an image height of 4mm, and the relative illuminance is large.

The lens structure data for the second exemplary system is given in table 3 below:

TABLE 3

The lens performance parameters for the corresponding system are given in table 4 below:

TABLE 4

Fig. 17 is a schematic diagram showing the distribution of light rays in the system having the lens structure data and the lens performance parameters.

In the application scene, the focal length is designed to be 19mm, the equivalent focal length is 125mm, the relative equivalent focal length can be 25mm, the main shooting 5X optical zooming can be realized, meanwhile, the Z1 is controlled to be 8.9mm, and the height of the lens Z in the conventional scheme is more than 18 mm. Therefore, compared with the traditional system, the scheme has obvious advantages.

Fig. 18 shows a field curvature diagram of the system, in which the abscissa represents the value of field curvature, the ordinate represents the field angle, the solid line represents the meridional field curvature, and the dashed line represents the sagittal field curvature, and it can be seen from the diagram that the maximum value of field curvature is less than 0.04mm, and the field curvature of the system is better optimized.

Fig. 19 shows a schematic diagram of a distortion curve of the system, in which the abscissa represents the distortion value and the ordinate represents the field angle, and it can be seen from the diagram that the maximum distortion value is less than 3%, and the distortion correction of the system is better.

Fig. 20 shows a schematic diagram of vertical axis chromatic aberration of the system, in which the abscissa represents the magnitude of chromatic aberration and the ordinate represents the field angle, and it can be known that the vertical axis chromatic aberration of the system is less than 0.0016mm, the chromatic aberration correction effect is good, and the color cast problem does not occur in the photographing result.

Fig. 21 is a schematic diagram showing the relative illuminance of the system, in which the abscissa represents the angle of view and the ordinate represents the relative illuminance value, and it can be seen from the figure that the relative illuminance of the system is 90% or more at an image height of 3.3mm, and the relative illuminance is large.

To sum up, this application realizes ultra-thin thickness when guaranteeing big light ring through increase the prism at the back at the telephoto lens, the burnt geometric length behind the effective compression camera lens. This application uses the prism to carry out the turn to the light path, realizes the big light ring big end of long focus, and light throws the light to the imaging chip in projecting to the prism from the imaging lens, again with the optical axis direction looks vertically direction of imaging lens on, finally throw, and simple structure that has, the space accounts for than littleer.

In a second aspect, based on the same concept, as shown in fig. 22, the present application provides a camera module 10, including:

the lens driving device 400, the prism fixing device 500 and the optical imaging system in the first aspect, the prism is fixed in the prism fixing device 500, and the prism fixing device 500 is adapted to the prism. The lens driving device 400 is fixed between the imaging lens 100 and the prism, and the lens driving device 400 is used for driving the imaging lens 100 to focus.

By fixing the prism in the prism fixing device 500, the camera module 10 is more secure. For example, when the prism is a T-shaped prism 200, the prism fixture 500 may be a T-shaped cavity, which is adapted to the size of the T-shaped prism 200. Still alternatively, when the prism is a triangular prism, the prism-fixing device 500 may be a triangular structure cavity adapted to the size of the triangular prism.

Further, the lens driving device 400 and the imaging chip 302 are on the same side relative to the prism, and the imaging chip 302 and the lens driving device 400 are arranged on the same side, so that the space on the side can be fully utilized, and the thickness of the camera module 10 is greatly reduced.

The lens driving device 400 may be a focusing motor, and the focusing motor is fixed between the imaging lens 100 and the prism and used for loading the imaging lens 100 to move up and down for focusing.

As an embodiment, the focusing motor can adopt a traditional VCM (voice coil) driving structure (namely a voice coil motor), so that the whole system is a length Jiao Mozu which can be focused, and the protruding area of the electronic equipment (such as a mobile phone) is small.

The voice coil motor mainly comprises a shell, an elastic sheet, a magnet, a coil + carrier, a base + elastic sheet and the like, and a motor assembly is fixed above the prism. The focusing motor is not only an elastic sheet, but also can be a ball, and the like, and can realize focusing without being limited to what is mentioned herein.

As an embodiment, the imaging lens 100 provided by the present application may include a lens group composed of a plurality of imaging lens groups, and the imaging lens 100 group includes at least one imaging lens 100.

The focusing motor is used to drive the lens group or a part of the imaging lens group 100 in the driving lens group for focusing, that is, the focusing motor can not only drive the whole imaging lens group 100 for focusing, but also split the lens group into a plurality of imaging lens groups, and then drive one or more of the imaging lens groups for focusing.

As another alternative embodiment, the lens driving apparatus 400 may further include a lens anti-shake module for performing anti-shake control on the lens, so that the lens driving apparatus 400 is a focusing and anti-shake integrated apparatus, that is, the lens group driving employs an optical anti-shake (OIS) + auto-focusing (AF) driver, so that the camera module 10 is a length Jiao Mozu capable of focusing and anti-shake, but compared with the case of only focusing, the integration of focusing and anti-shake makes the protruding position of the camera module 10 slightly larger in area and the difficulty of manufacturing the motor increases.

Therefore, the present application further provides a camera module 10 that can make the protruding area small, and can also realize focusing and anti-shake, as shown in fig. 23, i.e. fix the focusing motor between the imaging lens 100 and the prism, obtain focusing motor + lens 701, fix the chip anti-shake module at the imaging chip 302, obtain the chip anti-shake driver 702, wherein the chip anti-shake module is used for anti-shake control of the imaging chip.

Specifically, the imaging lens 100 is focused, and the imaging chip 302 is anti-shaking, so that the protruding area of the head is small, and the focusing and anti-shaking functions can be realized. Wherein, anti-shake module mainly can include upper cover, drive magnetite, chip board + coil, elastic plate + signal board and base.

As other alternative embodiments, the present solution may place a liquid sensor or a motion sensor on the foremost side of the imaging lens 100 (i.e. in front of the first lens 101) for focusing, or place a liquid sensor or a motion sensor on the rearmost side of the imaging lens 100 (behind the fourth lens 104) for focusing, or move the imaging lens 100 for focusing, etc.

As other alternative embodiments, the optical anti-shake may be performed by moving the imaging lens 100, moving a prism, or moving a sensor, etc.

As shown in fig. 24, the periscopic camera module 10 provided by the present application includes an imaging lens 100, a lens driving device 400 (i.e., a focusing motor), a T-prism 200, a prism fixing device 500, and an imaging chip 302.

In a third aspect, as shown in fig. 25, the present invention provides an electronic device 60, comprising: a camera module 10 according to any of the preceding second aspects, and one or more processors configured to process image signals generated from the camera module 10.

The electronic device 60 may be, but is not limited to, a smart phone, a tablet computer, a smart watch, an electronic book reader, a vehicle-mounted camera device, a monitoring device, a medical device, a drone, and so forth. Specifically, in an embodiment, the electronic device 60 is a smart phone, the smart phone includes a middle frame and a circuit board, the circuit board is disposed in the middle frame, the camera module 10 is installed in the middle frame of the smart phone, and the imaging chip 302 is electrically connected to the circuit board. The camera module 10 can be used as a front camera module or a rear camera module of a smart phone.

The camera module 10 in the above embodiment of the present application has the characteristics of long focus, high image brightness and small size, so that by using the camera module 10, the electronic device 60 can give consideration to the telephoto performance, and simultaneously has the characteristics of sufficient brightness of the shot image and miniaturization.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. An optical imaging system, comprising:

an imaging lens;

an imaging chip;

the prism comprises a first reflecting surface, a second reflecting surface and a third reflecting surface, light penetrating through the imaging lens enters the prism, is reflected by the first reflecting surface, the second reflecting surface and the third reflecting surface in the prism, is emitted from the prism, and is projected to the imaging chip;

or, the prism includes a first reflection surface and a second reflection surface, the light penetrating through the imaging lens is incident into the prism, is reflected by the first reflection surface and the second reflection surface in the prism, is emitted from the prism, and is projected to the imaging chip.

2. The system of claim 1, wherein the imaging chip and the imaging optic are on the same side of the prism.

3. The system of claim 1, wherein when the prism comprises a first reflective surface, a second reflective surface and a third reflective surface, the light transmitted through the imaging lens is incident into the prism, and is reflected by the first reflective surface, the second reflective surface and the third reflective surface in sequence in the prism, and then exits from the prism and is projected to the imaging chip.

4. The system of claim 3, wherein light transmitted through the imaging lens is incident into the prism from the second reflective surface and projected onto the first reflective surface, wherein light from the first reflective surface is projected onto the second reflective surface, wherein light from the second reflective surface is projected onto the third reflective surface, and wherein light from the third reflective surface is projected onto the imaging chip through the second reflective surface;

the imaging chip and the imaging lens are on the same side relative to the second reflecting surface.

5. The system of claim 4, wherein the second reflective surface is perpendicular to the optical axis of the imaging optic, and wherein the angle between the first reflective surface and the second reflective surface is acute and the angle between the second reflective surface and the third reflective surface is acute.

6. The system of claim 1, wherein the prism is a T-prism.

7. The utility model provides a module of making a video recording which characterized in that includes: lens driving means, prism holding means, and a system according to any of claims 1-6, the prism being held in the prism holding means, the prism holding means being adapted to the prism;

the lens driving device is fixed between the imaging lens and the prism and used for driving the imaging lens to focus.

8. The camera module of claim 7, wherein the lens driving device further comprises a lens anti-shake module, and the lens anti-shake module is used for anti-shake control of the imaging lens.

9. The camera module of claim 7, wherein the imaging chip further comprises a chip anti-shake module, and the chip anti-shake module is configured to perform anti-shake control on the imaging chip.

10. An electronic device, comprising: a camera module according to any of claims 7-9, and one or more processors configured to process image signals generated from the camera module.