TWI863034B - Camera modules and electronic equipment - Google Patents

Abstract

The present invention provides a photographic module and an electronic device, wherein the photographic module comprises a housing, an aperture, a lens element and a photosensitive assembly, wherein the lens element comprises a lens group, wherein the lens group comprises N lenses, wherein the refractive indexes of adjacent lenses among the N lenses are different, and the refractive indexes of lenses arranged at intervals among the N lenses are the same, and N is a positive integer greater than 1; the housing, the aperture and the photosensitive assembly enclose a receiving cavity, wherein the lens element is arranged in the receiving cavity, the aperture and the lens element are arranged opposite to each other, and the lens element and the photosensitive assembly are arranged opposite to each other; wherein light is incident on the lens element through the aperture to undergo light path refraction and is projected onto the photosensitive assembly.

Description

Camera modules and electronic equipment

The present invention belongs to the field of electronic equipment technology, and in particular to a camera module and electronic equipment.

As the photography function of electronic devices matures, more and more users use electronic devices to take pictures. The various rays of light collected by the aperture in the camera module are refracted by the lens, forming an image with a relatively dispersed light field distribution. In related technologies, the point spread function (PSF) algorithm is usually used to optimize the image and perform PSF restoration on the image to form an image with a more concentrated light field, solving the above-mentioned technical problems. However, the above-mentioned PSF algorithm has too high requirements on computing power. Due to the limitation of the computing power that can be provided by electronic equipment, the PSF algorithm cannot be used to perform complete PSF restoration of the image, which results in low image clarity and reduces the image display effect.

The purpose of the present invention is to provide a camera module and an electronic device, which can solve the technical problem in the related art that the electronic device cannot perform complete PSF restoration on the image, thereby reducing the display effect of the image.

In order to solve the above technical problems, the present invention is implemented as follows: In a first aspect, the present invention provides a photographic module, including a housing, an aperture, a lens element and a photosensitive component, the lens element includes a lens group, the lens group includes N lenses, the refractive indexes of adjacent lenses in the N lenses are different, and the refractive indexes of the lenses arranged at intervals in the N lenses are the same, and N is a positive integer greater than 1; the housing, the aperture and the photosensitive component are surrounded to form a receiving cavity, the lens element is arranged in the receiving cavity, the aperture and the lens element are arranged opposite to each other, and the lens element and the photosensitive component are arranged opposite to each other; wherein, light passes through the aperture and enters the lens element to be refracted in the light path and projected onto the photosensitive component.

In a second aspect, the present invention provides an electronic device, comprising the camera module of the first aspect.

The camera module provided by the present invention includes a housing, an aperture, a lens element and a photosensitive assembly, the lens element includes a lens group, the lens group includes N lenses, the refractive indexes of adjacent lenses in the N lenses are different, and the refractive indexes of lenses arranged at intervals in the N lenses are the same, and N is a positive integer greater than 1; the housing, the aperture and the photosensitive assembly are surrounded to form a receiving cavity, the lens element is arranged in the receiving cavity, the aperture and the lens element are arranged opposite to each other, and the lens element and the photosensitive assembly are arranged opposite to each other; wherein, light passes through the aperture and enters the lens element to be refracted in the light path and projected onto the photosensitive assembly. In the present invention, the refractive indexes of adjacent lenses among the N lenses are set to be the same, and the refractive indexes of the lenses arranged at intervals among the N lenses are set to be different. After the light passes through the aperture and enters the lens element for light path refraction and is projected onto the photosensitive component, the light field distribution of the image generated by the photosensitive component is more concentrated. In the subsequent process, the image generated by the photosensitive component can be optimized by the PSF algorithm using less computing power, thereby obtaining an image with higher definition and improving the image display effect.

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making progressive improvements are within the scope of protection of the present invention.

The terms "first", "second", etc. in the specification and patent application of the present invention are used to distinguish similar objects, rather than to describe a specific order or precedence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention can be implemented in an order other than those illustrated or described herein. In addition, "and/or" in the specification and patent application indicates at least one of the connected objects, and the character "/" generally indicates that the objects associated before and after are in an "or" relationship.

In related technologies, the light collected by the aperture in the camera module forms a spot diagram of the image on the photosensitive element when it is refracted by the lens. The spot diagram can be represented by the point spread function value corresponding to the image, and the spot diagram can be understood as the PSF type of the image. The spot diagrams formed by the camera module under different fields of view or different focal distances are quite different, resulting in a more dispersed light field distribution of the image.

For ease of understanding, please refer to Figure 1a. Example 1 in Figure 1a shows the distribution of the light spot diagram formed by the camera module in different fields of view when the focus distance is infinite. Example 2 in Figure 1a shows the distribution of the light spot diagram formed by the camera module in different fields of view when the focus distance is 20cm. It can be seen from Figure 1a that when the focus distance changes, the distribution state of the light spot diagram corresponding to the same field of view is quite different.

For easier understanding, please refer to Figure 1b, which shows the distribution of the light spot diagram formed by the camera module in different fields of view when the focus distance is infinite and the wavelength distribution is 0.47um, 0.51um, 0.555um, 0.61um and 0.65um. It can be seen from Figure 1b that when the wavelength changes, the distribution state of the light spot diagram corresponding to the same field of view is quite different.

From the above content, we can conclude that in the relevant technology, the various light rays collected by the aperture in the camera module are refracted by the lens passing through, forming an image with a relatively dispersed light field distribution. In the subsequent process of PSF restoration of the image, the computing power requirements are relatively high. Due to the limitation of the computing power that can be provided by electronic equipment, the PSF algorithm cannot be used to perform complete PSF restoration of the image, which results in low image clarity and reduces the image display effect.

Please refer to FIG. 2, which is one of the structural schematic diagrams of the camera module provided by the embodiment of the present invention. As shown in FIG. 2, the camera module includes a housing 10, an aperture 20, a lens element 30 and a photosensitive assembly 40, the lens element includes a lens group, the lens group includes N lenses, the refractive indexes of adjacent lenses in the N lenses are different, and the refractive indexes of the lenses arranged at intervals in the N lenses are the same, and N is a positive integer greater than 1; the housing 10, the aperture 20 and the photosensitive assembly 40 enclose a receiving cavity, the lens element 30 is arranged in the receiving cavity, the aperture 20 and the lens element 30 are arranged opposite to each other, and the lens element 30 and the photosensitive assembly 40 are arranged opposite to each other.

Optionally, the photosensitive assembly 40 includes a filter 410 and a photosensitive element 420 that are arranged opposite to each other, and the distance between the filter 410 and the lens element 30 is smaller than the distance between the photosensitive element 420 and the lens element 30.

Optionally, the filter 410 is an infrared filter 410 for filtering infrared rays in the light.

In the embodiment of the present invention, light passes through the aperture 20 and enters the lens element 30 for light path refraction, and is projected onto the photosensitive component 40 to form a target image, wherein the point spread function value corresponding to the target image is located in a preset range. In the above process, by setting the refractive indexes of adjacent lenses among the N lenses to be the same, and setting the refractive indexes of the lenses arranged at intervals among the N lenses to be different, the point spread function value corresponding to the target image generated by the photosensitive component 40 is located in the preset range, so that the light field distribution corresponding to the target image is concentrated, that is, a PSF type with small differences under different fields of view is formed.

The camera module provided by the embodiment of the present invention includes a housing 10, an aperture 20, a lens element 30 and a photosensitive assembly 40, wherein the lens element 30 includes a lens group, and the lens group includes N lenses, wherein the refractive indexes of adjacent lenses among the N lenses are different, and the refractive indexes of the lenses arranged at intervals among the N lenses are the same, and N is a positive integer greater than 1; the housing 10, the aperture 20 and the photosensitive assembly 40 are enclosed to form a receiving cavity, and the lens element 30 is arranged in the receiving cavity, the aperture 20 and the lens element 30 are arranged opposite to each other, and the lens element 30 and the photosensitive assembly 40 are arranged opposite to each other; wherein, light passes through the aperture 20 and enters the lens element 30 to be refracted in the light path and projected onto the photosensitive assembly 40. In the embodiment of the present invention, the refractive indexes of adjacent lenses among the N lenses are set to be the same, and the refractive indexes of the lenses arranged at intervals among the N lenses are set to be different. After the light passes through the aperture 20 and enters the lens element 30 for light path refraction and is projected onto the photosensitive component 40, the light field distribution of the image generated by the photosensitive component 40 is more concentrated. In the subsequent process, the image generated by the photosensitive component 40 can be optimized by the PSF algorithm using less computing power to obtain an image with higher definition, thereby improving the display effect of the image.

It should be noted that the camera module provided in the embodiment of the present invention can improve image quality under different digital zooms such as 2X, 4X, and 8X.

Optionally, the lens element 30 further includes a first lens 311 and a second lens 312;

A lens group is disposed between the first lens 311 and the second lens 312. The first lens 311 is disposed opposite to the lens group, the second lens 312 is disposed opposite to the lens group, and the distance between the first lens 311 and the aperture 20 is smaller than the distance between the second lens 312 and the aperture 20.

Referring to FIG. 2 , the lens element 30 includes a first lens 311, a second lens 312 and a lens group. The lens group includes N lenses. Optionally, the number N is set to 4, that is, the lens group includes 4 lenses.

In the embodiment of the present invention, by adjusting the surface parameters of the first lens 311 and the surface parameters of the second lens 312, as well as adjusting the surface parameters and materials of the lenses included in the lens group, an image with a relatively concentrated light field distribution can be formed after the light is refracted through the lens element 30. It should be understood that the above-mentioned surface parameters include but are not limited to thickness and effective focal length; after adjusting the material of the lens, the refractive index and dispersion of the lens will be affected.

It should be understood that in the embodiment of the present invention, in order to ensure the yield of the imaging element in the production process, the materials of the first lens 311 and the second lens 312 are not adjusted. Optionally, the materials of the above lenses include but are not limited to resin, polycarbonate and optical glass. In addition, the technical effect of saving costs is also achieved.

Optionally, the thickness of the first lens 311 is greater than 0.89 mm and less than 1.2 mm; the thickness of the second lens 312 is greater than 0.4 mm and less than 0.67 mm, and the effective focal length corresponding to the second lens 312 is greater than -12.3 mm and less than -8 mm; the refractive index of the first lens 311 is the same as the refractive index of the second lens 312.

In this embodiment, the thickness of the first lens 311 can be expressed as centerthickness1 (CT1). The CT1 parameter can be set, that is, 0.89 mm < CT1 < 1.2 mm.

In this embodiment, the thickness of the second lens 312 can be expressed as centerthickness2 (CT2), and the effective focal length corresponding to the second lens 312 can be expressed as EFL2 (f2). The two parameters CT2 and f2 can be set, that is, 0.4mm＜CT2＜0.67mm, -12.3mm＜f2＜-8mm.

Optionally, the lens group includes a third lens 313, a fourth lens 314, a fifth lens 315 and a sixth lens 316; the third lens 313 is arranged between the first lens 311 and the second lens 312, the fourth lens 314 is arranged between the third lens 313 and the second lens 312, the fifth lens 315 is arranged between the fourth lens 314 and the second lens 312, the sixth lens 316 is arranged between the fifth lens 315 and the second lens 312, and the first lens 311, the second lens 312, the third lens 313, the fourth lens 314, the fifth lens 315 and the sixth lens 316 are arranged relatively.

As shown in FIG. 2 , in an optional embodiment, a lens group is provided including four lenses, namely a third lens 313, a fourth lens 314, a fifth lens 315 and a sixth lens 316, and light is refracted by the first lens 311, the second lens 312, the third lens 313, the fourth lens 314, the fifth lens 315 and the sixth lens 316 to form an image with a relatively concentrated light field distribution.

It should be noted that the refractive indices of adjacent lenses in the lens group are different, and the refractive indices of interval lenses are the same. Optionally, the third lens 313, the fourth lens 314, the fifth lens 315 and the sixth lens 316 included in the lens group can be arranged in the following implementation manner.

In an optional implementation, the refractive index of the third lens 313 is lower than the refractive index of the fourth lens 314, the refractive index of the third lens 313 is the same as the refractive index of the fifth lens 315, and the refractive index of the fourth lens 314 is the same as the refractive index of the sixth lens 316.

Another optional implementation is that the refractive index of the third lens 313 is higher than the refractive index of the fourth lens 314, the refractive index of the third lens 313 is the same as the refractive index of the fifth lens 315, and the refractive index of the fourth lens 314 is the same as the refractive index of the sixth lens 316.

Another optional implementation is that the refractive index of the third lens 313 is higher than the refractive index of the fourth lens 314, the refractive index of the third lens 313 is the same as the refractive index of the sixth lens 316, and the refractive index of the fourth lens 314 is the same as the refractive index of the fifth lens 315.

Optionally, the refractive index of the third lens 313 is greater than 1.54 and less than 1.67, the refractive index of the fourth lens 314 is greater than 1.54 and less than 1.67, the refractive index of the fifth lens 315 is greater than 1.54 and less than 1.67, and the refractive index of the sixth lens 316 is greater than 1.54 and less than 1.67.

In this embodiment, the refractive index of the third lens 313 can be expressed as abbenumber3 (V3), the refractive index of the fourth lens 314 can be expressed as abbenumber4 (V4), the refractive index of the fifth lens 315 can be expressed as abbenumber5 (V5), and the refractive index of the sixth lens 316 can be expressed as abbenumber6 (V6).

The above four parameters V3, V4, V5 and V6 can be set, that is, 1.54＜V3＜1.67, 1.54＜V4＜1.67, 1.54＜V5＜1.67, 1.54＜V6＜1.67.

Optionally, the dispersion of the third lens 313 is greater than 19 and less than 56, the dispersion of the fourth lens 314 is greater than 19 and less than 56, the dispersion of the fifth lens 315 is greater than 19 and less than 56, and the dispersion of the sixth lens 316 is greater than 19 and less than 56.

In this embodiment, the dispersion of the third lens 313 can be expressed as refractiveindex3 (N3), the dispersion of the fourth lens 314 can be expressed as refractiveindex4 (N4), the dispersion of the fifth lens 315 can be expressed as refractiveindex5 (N5), and the dispersion of the sixth lens 316 can be expressed as refractiveindex6 (N6).

The above four parameters N3, N4, N5 and N6 can be set, that is, 19＜N3＜56, 19＜N4＜56, 19＜N5＜56, 19＜N6＜56.

Optionally, the thickness of the third lens 313 is greater than 0.4 mm and less than 0.69 mm, the thickness of the fourth lens 314 is greater than 0.4 mm and less than 0.57 mm, the thickness of the fifth lens 315 is greater than 0.53 mm and less than 0.77 mm, and the thickness of the sixth lens 316 is greater than 0.45 mm and less than 0.51 mm.

In this embodiment, the thickness of the third lens 313 can be expressed as centerthickness3 (CT3), the thickness of the fourth lens 314 can be expressed as centerthickness4 (CT4), the thickness of the fifth lens 315 can be expressed as centerthickness5 (CT5), and the thickness of the sixth lens 316 can be expressed as centerthickness6 (CT6).

The above four parameters CT3, CT4, CT5 and CT6 can be set, that is, 0.4mm＜CT3＜0.69mm, 0.4mm＜CT4＜0.57mm, 0.53mm＜CT5＜0.77mm, and 0.45mm＜CT6＜0.51mm.

Optionally, the effective focal length of the third lens 313 is greater than -8.1 mm and less than 5.2 mm, the effective focal length of the fourth lens 314 is greater than -6.8 mm and less than 11.1 mm, the effective focal length of the fifth lens 315 is greater than -24.9 mm and less than 28.3 mm, and the effective focal length of the sixth lens 316 is greater than 12.8 mm and less than 42.5 mm.

In this embodiment, the effective focal length of the third lens 313 can be expressed as EFL3 (f3), the effective focal length of the fourth lens 314 can be expressed as EFL4 (f4), the effective focal length of the fifth lens 315 can be expressed as EFL5 (f5), and the effective focal length of the sixth lens 316 can be expressed as EFL6 (f6).

The above four parameters f3, f4, f5 and f6 can be set, that is, -8.1mm＜f3＜-5.2mm, -6.8mm＜f4＜11.1mm, -24.9mm＜f5＜28.3mm, and 12.8mm＜f6＜42.5mm.

Alternatively, for an aspherical surface of a lens, the aspheric coefficient can be set by the following formula:

Wherein, Z is the Z-axis coordinate of the aspherical surface, X is the X-axis coordinate of the aspherical surface, the above coordinates are located in a three-dimensional coordinate system with the center point of the aspherical surface as the coordinate center, K is the cone coefficient corresponding to the aspherical surface, C is the radius of curvature corresponding to the aspherical surface, and A_1-A_n is the aspherical coefficient.

To facilitate understanding of the overall technical solution, please refer to the following embodiments: Embodiment 1: In Embodiment 1, the optical distortion parameter corresponding to the imaging module is greater than -1% and less than 0%, the display field of view (DFOV) corresponding to the imaging module is 48 degrees, the effective focal length corresponding to the imaging module is 6.823 mm, and the aperture 20 included in the imaging module is F2.2 aperture 20.

In Embodiment 1, referring to FIG. 2 , the lens group in the camera module includes 4 lenses. The refractive index of the first lens 311 is set to 1.54, the dispersion of the first lens 311 is set to 55.98, the thickness of the first lens 311 is set to 1.07 mm, the curvature radius corresponding to the first aspheric surface of the first lens 311 is 0.33 mm, the curvature radius corresponding to the other aspheric surface of the first lens 311 is -0.01 mm, and the effective focal length corresponding to the first lens 311 is 5.48 mm.

The refractive index of the second lens 312 is set to 1.54, the dispersion of the second lens 312 is 55.98, the thickness of the second lens 312 is 0.4 mm, the curvature radius corresponding to the second aspherical surface of the second lens 312 is -0.3 mm, the curvature radius corresponding to the third aspherical surface of the second lens 312 is -0.14 mm, and the effective focal length corresponding to the second lens 312 is -11.7 mm.

The refractive index of the third lens 313 is set to 1.67, the dispersion of the third lens 313 is set to 19.24, the thickness of the third lens 313 is set to 0.4 mm, the radius of curvature corresponding to the fourth aspheric surface of the third lens 313 is set to 0.35 mm, the radius of curvature corresponding to the fifth aspheric surface of the third lens 313 is set to 0.56 mm, and the effective focal length corresponding to the third lens 313 is set to -8.11 mm.

The refractive index of the fourth lens 314 is set to 1.54, the dispersion of the fourth lens 314 is set to 55.98, the thickness of the fourth lens 314 is set to 0.54 mm, the curvature radius corresponding to the sixth aspheric surface of the fourth lens 314 is set to 0.26 mm, the curvature radius corresponding to the seventh aspheric surface of the fourth lens 314 is set to 0.1 mm, and the effective focal length corresponding to the fourth lens 314 is set to 11.13 mm.

The refractive index of the fifth lens 315 is set to 1.67, the dispersion of the fifth lens 315 is set to 19.24, the thickness of the fifth lens 315 is set to 0.53 mm, the curvature radius corresponding to the eighth aspheric surface of the fifth lens 315 is set to -0.58 mm, the curvature radius corresponding to the ninth aspheric surface of the fifth lens 315 is set to 0.46 mm, and the effective focal length corresponding to the fifth lens 315 is set to -24.92 mm.

The refractive index of the sixth lens 316 is set to 1.54, the dispersion of the sixth lens 316 is set to 55.98, the thickness of the sixth lens 316 is set to 0.45 mm, the curvature radius corresponding to the tenth aspheric surface of the sixth lens 316 is set to 0.5 mm, the curvature radius corresponding to the eleventh aspheric surface of the sixth lens 316 is set to 0.39 mm, and the effective focal length corresponding to the sixth lens 316 is set to 12.79 mm.

Furthermore, Figure 3a shows the distribution of the light spot diagram formed by the camera module in different fields of view when the focus distance is infinite and the wavelength distribution is 0.47um, 0.51um, 0.555um, 0.61um and 0.65um. It can be seen from Figure 3a that when the wavelength changes, the difference in the distribution of the light spot diagram corresponding to the same field of view is small.

Furthermore, Example 1 in FIG3b shows the distribution of the light spot diagram formed by the camera module in different fields of view when the focus distance is infinite. Example 2 in FIG3b shows the distribution of the light spot diagram formed by the camera module in different fields of view when the focus distance is 20 cm. It can be seen from FIG3b that when the focus distance changes, the difference in the distribution of the light spot diagram corresponding to the same field of view is small.

Example 2: In Example 2, the Optical distortion parameter corresponding to the camera module is greater than -1% and less than 0%, the DFOV corresponding to the camera module is 48 degrees, the effective focal length corresponding to the camera module is 6.823 mm, and the aperture 20 included in the camera module is F2.2 aperture 20.

In Embodiment 2, referring to FIG. 4 , the lens group in the camera module includes 4 lenses. The refractive index of the first lens 311 is set to 1.54, the dispersion of the first lens 311 is set to 55.98, the thickness of the first lens 311 is set to 0.89 mm, the curvature radius corresponding to the first aspheric surface of the first lens 311 is set to 0.37 mm, the curvature radius corresponding to the other aspheric surface of the first lens 311 is set to 0.37 mm, and the effective focal length corresponding to the first lens 311 is set to 45.18 mm.

The refractive index of the second lens 312 is set to 1.54, the dispersion of the second lens 312 is set to 55.98, the thickness of the second lens 312 is set to 0.48 mm, the curvature radius corresponding to the second aspherical surface of the second lens 312 is set to -0.42 mm, the curvature radius corresponding to the third aspherical surface of the second lens 312 is set to -0.26 mm, and the effective focal length corresponding to the second lens 312 is set to -12.33 mm.

The refractive index of the third lens 313 is set to 1.54, the dispersion of the third lens 313 is 55.98, the thickness of the third lens 313 is 0.69 mm, the curvature radius corresponding to the fourth aspheric surface of the third lens 313 is 0.49 mm, the curvature radius corresponding to the fifth aspheric surface of the third lens 313 is 0.16 mm, and the effective focal length corresponding to the third lens 313 is 5.24 mm.

The refractive index of the fourth lens 314 is set to 1.67, the dispersion of the fourth lens 314 is set to 19.24, the thickness of the fourth lens 314 is set to 0.57 mm, the curvature radius corresponding to the sixth aspheric surface of the fourth lens 314 is set to -0.41 mm, the curvature radius corresponding to the seventh aspheric surface of the fourth lens 314 is set to -0.18 mm, and the effective focal length corresponding to the fourth lens 314 is set to -6.8 mm.

The refractive index of the fifth lens 315 is set to 1.54, the dispersion of the fifth lens 315 is set to 55.98, the thickness of the fifth lens 315 is set to 0.61 mm, the curvature radius corresponding to the eighth aspheric surface of the fifth lens 315 is set to 0.41 mm, the curvature radius corresponding to the ninth aspheric surface of the fifth lens 315 is set to 0.28 mm, and the effective focal length corresponding to the fifth lens 315 is set to 11.53 mm.

The refractive index of the sixth lens 316 is set to 1.67, the dispersion of the sixth lens 316 is set to 19.24, the thickness of the sixth lens 316 is set to 0.51 mm, the curvature radius corresponding to the tenth aspheric surface of the sixth lens 316 is set to 0.31 mm, the curvature radius corresponding to the eleventh aspheric surface of the sixth lens 316 is set to 0.28 mm, and the effective focal length corresponding to the sixth lens 316 is set to 31.85 mm.

Furthermore, Figure 5a shows the distribution of the light spot diagram formed by the camera module in different fields of view when the focus distance is infinite and the wavelength distribution is 0.47um, 0.51um, 0.555um, 0.61um and 0.65um. It can be seen from Figure 5a that when the wavelength changes, the difference in the distribution of the light spot diagram corresponding to the same field of view is small.

Furthermore, Example 1 in FIG5b shows the distribution of the light spot diagram formed by the camera module in different fields of view when the focus distance is infinite. Example 2 in FIG5b shows the distribution of the light spot diagram formed by the camera module in different fields of view when the focus distance is 20 cm. It can be seen from FIG5b that when the focus distance changes, the difference in the distribution of the light spot diagram corresponding to the same field of view is small.

Example 3: In Example 3, the optical distortion parameter corresponding to the camera module is greater than -1% and less than 0%, the DFOV corresponding to the camera module is 48 degrees, the effective focal length corresponding to the camera module is 6.823 mm, and the aperture 20 included in the camera module is F2.2 aperture 20.

In Embodiment 3, referring to FIG6 , the lens group in the camera module includes 4 lenses. The refractive index of the first lens 311 is set to 1.54, the dispersion of the first lens 311 is 55.98, the thickness of the first lens 311 is 1.18 mm, the curvature radius corresponding to the first aspheric surface of the first lens 311 is 0.35 mm, the curvature radius corresponding to the other aspheric surface of the first lens 311 is 0.01 mm, and the effective focal length corresponding to the first lens 311 is 5.41 mm.

The refractive index of the second lens 312 is set to 1.54, the dispersion of the second lens 312 is set to 55.98, the thickness of the second lens 312 is set to 0.67 mm, the curvature radius corresponding to the second aspheric surface of the second lens 312 is set to -0.33 mm, the curvature radius corresponding to the third aspheric surface of the second lens 312 is set to -0.1 mm, and the effective focal length corresponding to the second lens 312 is set to -7.97 mm.

The refractive index of the third lens 313 is set to 1.67, the dispersion of the third lens 313 is set to 19.24, the thickness of the third lens 313 is set to 0.5 mm, the radius of curvature corresponding to the fourth aspheric surface of the third lens 313 is set to 0.18 mm, the radius of curvature corresponding to the fifth aspheric surface of the third lens 313 is set to 0.42 mm, and the effective focal length corresponding to the third lens 313 is set to -5.56 mm.

The refractive index of the fourth lens 314 is set to 1.54, the dispersion of the fourth lens 314 is set to 55.98, the thickness of the fourth lens 314 is set to 0.4 mm, the curvature radius corresponding to the sixth aspheric surface of the fourth lens 314 is set to -0.33 mm, the curvature radius corresponding to the seventh aspheric surface of the fourth lens 314 is set to -0.13 mm, and the effective focal length corresponding to the fourth lens 314 is set to 8.89 mm.

The refractive index of the fifth lens 315 is set to 1.54, the dispersion of the fifth lens 315 is set to 55.98, the thickness of the fifth lens 315 is set to 0.61 mm, the curvature radius corresponding to the eighth aspheric surface of the fifth lens 315 is set to -0.47 mm, the curvature radius corresponding to the ninth aspheric surface of the fifth lens 315 is set to -0.48 mm, and the effective focal length corresponding to the fifth lens 315 is set to 28.28 mm.

The refractive index of the sixth lens 316 is set to 1.54, the dispersion of the sixth lens 316 is set to 55.98, the thickness of the sixth lens 316 is set to 0.5 mm, the curvature radius corresponding to the tenth aspheric surface of the sixth lens 316 is set to 0.3 mm, the curvature radius corresponding to the eleventh aspheric surface of the sixth lens 316 is set to 0.28 mm, and the effective focal length corresponding to the sixth lens 316 is set to 42.49 mm.

Furthermore, Figure 7a shows the distribution of the light spot diagram formed by the camera module in different fields of view when the focus distance is infinite and the wavelength distribution is 0.47um, 0.51um, 0.555um, 0.61um and 0.65um. It can be seen from Figure 7a that when the wavelength changes, the difference in the distribution of the light spot diagram corresponding to the same field of view is small.

Furthermore, Example 1 in FIG7b shows the distribution of the light spot diagram formed by the camera module in different fields of view when the focus distance is infinite. Example 2 in FIG7b shows the distribution of the light spot diagram formed by the camera module in different fields of view when the focus distance is 20 cm. It can be seen from FIG7b that when the focus distance changes, the difference in the distribution of the light spot diagram corresponding to the same field of view is small.

Embodiment 4: In Embodiment 4, the optical distortion parameter corresponding to the camera module is greater than -1% and less than 0%, the DFOV corresponding to the camera module is 48 degrees, the effective focal length corresponding to the camera module is 6.815 mm, and the aperture 20 included in the camera module is F2.2 aperture 20.

In Embodiment 4, referring to FIG8 , the lens group in the camera module includes 4 lenses. The refractive index of the first lens 311 is set to 1.54, the dispersion of the first lens 311 is 55.98, the thickness of the first lens 311 is 1.18 mm, the radius of curvature corresponding to the first aspheric surface of the first lens 311 is 0.35 mm, the radius of curvature corresponding to the other aspheric surface of the first lens 311 is 0.00 mm, and the effective focal length corresponding to the first lens 311 is 5.19 mm.

The refractive index of the second lens 312 is set to 1.54, the dispersion of the second lens 312 is set to 55.98, the thickness of the second lens 312 is set to 0.4 mm, the curvature radius corresponding to the second aspherical surface of the second lens 312 is set to -0.34 mm, the curvature radius corresponding to the third aspherical surface of the second lens 312 is set to -0.14 mm, and the effective focal length corresponding to the second lens 312 is set to -9.19 mm.

The refractive index of the third lens 313 is set to 1.65, the dispersion of the third lens 313 is set to 28, the thickness of the third lens 313 is set to 0.4 mm, the curvature radius corresponding to the fourth aspheric surface of the third lens 313 is set to 0.02 mm, the curvature radius corresponding to the fifth aspheric surface of the third lens 313 is set to 0.46 mm, and the effective focal length corresponding to the third lens 313 is set to -3.51 mm.

The refractive index of the fourth lens 314 is set to 1.59, the dispersion of the fourth lens 314 is set to 42, the thickness of the fourth lens 314 is set to 0.58 mm, the curvature radius corresponding to the sixth aspheric surface of the fourth lens 314 is set to 0.46 mm, the curvature radius corresponding to the seventh aspheric surface of the fourth lens 314 is set to 0.09 mm, and the effective focal length corresponding to the fourth lens 314 is set to 4.46 mm.

The refractive index of the fifth lens 315 is set to 1.65, the dispersion of the fifth lens 315 is set to 28, the thickness of the fifth lens 315 is set to 0.53 mm, the curvature radius corresponding to the eighth aspheric surface of the fifth lens 315 is set to -0.36 mm, the curvature radius corresponding to the ninth aspheric surface of the fifth lens 315 is set to -0.28 mm, and the effective focal length corresponding to the fifth lens 315 is set to -24.49 mm.

The refractive index of the sixth lens 316 is set to 1.59, the dispersion of the sixth lens 316 is set to 42, the thickness of the sixth lens 316 is set to 0.51 mm, the curvature radius corresponding to the tenth aspheric surface of the sixth lens 316 is set to 0.56 mm, the curvature radius corresponding to the eleventh aspheric surface of the sixth lens 316 is set to 0.47 mm, and the effective focal length corresponding to the sixth lens 316 is set to 12.84 mm.

Furthermore, Figure 9a shows the distribution of the light spot diagram formed by the camera module in different fields of view when the focus distance is infinite and the wavelength distribution is 0.47um, 0.51um, 0.555um, 0.61um and 0.65um. It can be seen from Figure 9a that when the wavelength changes, the difference in the distribution of the light spot diagram corresponding to the same field of view is small.

Furthermore, Example 1 in FIG9b shows the distribution of the light spot diagram formed by the camera module in different fields of view when the focus distance is infinite. Example 2 in FIG9b shows the distribution of the light spot diagram formed by the camera module in different fields of view when the focus distance is 20 cm. It can be seen from FIG9b that when the focus distance changes, the difference in the distribution of the light spot diagram corresponding to the same field of view is small.

The embodiment of the present invention also provides an electronic device, which includes the imaging element provided by the above embodiment. The specific implementation of the imaging element can refer to the above description and can achieve the same technical effect. To avoid repetition, no further description is given.

In the embodiments of the present invention, the electronic devices may be computers, mobile phones, tablet personal computers (TPC), laptop computers (LC), personal digital assistants (PDA), mobile Internet devices (MID), wearable devices (WD), electronic readers, navigators, digital cameras, etc.

The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative and not restrictive. Under the inspiration of the present invention, a person with ordinary knowledge in the field can make many forms without departing from the scope protected by the purpose of the present invention and the scope of the patent application, all of which are within the protection of the present invention.

10: Housing 20: Aperture 30: Lens element 311: First lens 312: Second lens 313: Third lens 314: Fourth lens 315: Fifth lens 316: Sixth lens 40: Photosensitive component 410: Filter 420: Photosensitive element

Figure 1a is one of the distribution diagrams of the light spot diagram in the related technology; Figure 1b is one of the distribution diagrams of the light spot diagram in the related technology; Figure 2 is one of the structural diagrams of the camera module provided by the embodiment of the present invention; Figure 3a is one of the distribution diagrams of the light spot diagram provided by the embodiment of the present invention; Figure 3b is one of the distribution diagrams of the light spot diagram provided by the embodiment of the present invention; Figure 4 is one of the structural diagrams of the camera module provided by the embodiment of the present invention; Figure 5a is one of the distribution diagrams of the light spot diagram provided by the embodiment of the present invention; Figure 5b is one of the distribution diagrams of the light spot diagram provided by the embodiment of the present invention; Figure 6 is one of the structural diagrams of the camera module provided by the embodiment of the present invention; Figure 7a is the seventh schematic diagram of the distribution of the light spot diagram provided by the embodiment of the present invention; Figure 7b is the eighth schematic diagram of the distribution of the light spot diagram provided by the embodiment of the present invention; Figure 8 is the fourth schematic diagram of the structure of the camera module provided by the embodiment of the present invention; Figure 9a is the ninth schematic diagram of the distribution of the light spot diagram provided by the embodiment of the present invention; Figure 9b is the tenth schematic diagram of the distribution of the light spot diagram provided by the embodiment of the present invention.

10: Shell

20: Aperture

30: Lens components

311: First lens

312: Second lens

313: The third lens

314: The fourth lens

315: The fifth lens

316: The sixth lens

40: Photosensitive component

410: Filter

420: Photosensitive element

Claims (9)

A camera module mainly comprises: a lens element, the lens element comprises a lens group, the lens group comprises N lenses, the refractive indexes of adjacent lenses in the N lenses are different, and the refractive indexes of lenses arranged at intervals in the N lenses are the same, and N is a positive integer greater than 1; a housing cavity formed by a housing, an aperture and a photosensitive component, the lens element is arranged in the housing cavity, the aperture is arranged opposite to the lens element, and the lens element and the photosensitive component are arranged opposite to each other. wherein the light passes through the aperture and enters the lens element for light path refraction and is projected onto the photosensitive component; the lens element further comprises a first lens and a second lens; the thickness of the first lens is greater than 0.89 mm and less than 1.2 mm; the thickness of the second lens is greater than 0.4 mm and less than 0.67 mm, and the effective focal length corresponding to the second lens is greater than -12.3 mm and less than -8 mm; the refractive index of the first lens is the same as the refractive index of the second lens. The camera module as described in claim 1, wherein the lens group is disposed between the first lens and the second lens, the first lens is disposed opposite to the lens group, the second lens is disposed opposite to the lens group, and the distance between the first lens and the aperture is smaller than the distance between the second lens and the aperture. The camera module as described in claim 2, wherein the lens group includes a third lens, a fourth lens, a fifth lens and a sixth lens; the third lens is arranged between the first lens and the second lens, the fourth lens is arranged between the third lens and the second lens, the fifth lens is arranged between the fourth lens and the second lens, the sixth lens is arranged between the fifth lens and the second lens, and the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are arranged relatively. The camera module as described in claim 3, wherein the refractive index of the third lens is lower than the refractive index of the fourth lens, the refractive index of the third lens is the same as the refractive index of the fifth lens, and the refractive index of the fourth lens is the same as the refractive index of the sixth lens. The camera module as described in claim 3, wherein the refractive index of the third lens is higher than the refractive index of the fourth lens, the refractive index of the third lens is the same as the refractive index of the fifth lens, and the refractive index of the fourth lens is the same as the refractive index of the sixth lens. The camera module as described in claim 3, wherein the refractive index of the third lens is higher than the refractive index of the fourth lens, the refractive index of the third lens is the same as the refractive index of the sixth lens, and the refractive index of the fourth lens is the same as the refractive index of the fifth lens. The imaging module as described in claim 3, wherein the refractive index of the third lens is greater than 1.54 and less than 1.67, the dispersion of the third lens is greater than 19 and less than 56, the thickness of the third lens is greater than 0.4 mm and less than 0.69 mm, and the effective focal length of the third lens is greater than -8.1 mm and less than 5.2 mm; the refractive index of the fourth lens is greater than 1.54 and less than 1.67, the dispersion of the fourth lens is greater than 19 and less than 56, the thickness of the fourth lens is greater than 0.4 mm and less than 0.57 mm, and the effective focal length of the fourth lens is greater than -6.8 mm and less than 11 .1mm; the refractive index of the fifth lens is greater than 1.54 and less than 1.67, the dispersion of the fifth lens is greater than 19 and less than 56, the thickness of the fifth lens is greater than 0.53mm and less than 0.77mm, and the effective focal length of the fifth lens is greater than -24.9mm and less than 28.3mm; the refractive index of the sixth lens is greater than 1.54 and less than 1.67, the dispersion of the sixth lens is greater than 19 and less than 56, the thickness of the sixth lens is greater than 0.45mm and less than 0.51mm, and the effective focal length of the sixth lens is greater than 12.8mm and less than 42.5mm. The camera module as described in claim 1, wherein the photosensitive component includes a filter and a photosensitive element arranged opposite to each other, and the distance between the filter and the lens element is smaller than the distance between the photosensitive element and the lens element. An electronic device, which mainly includes a camera module as described in any one of claims 1 to 8.