Wide-angle high-definition camera

Abstract

The invention discloses a wide-angle high-definition camera, and belongs to the technical field of cameras. A wide-angle high-definition camera comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens, and object side surfaces and image side surfaces of the first lens, the second lens, the third lens, the fourth lens and the fifth lens are aspheric surfaces; through the five-lens type design formed by the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the diaphragm, and the surface shape structures of the lenses are combined with the optimal range of optical parameters, the optical system of the camera has the characteristics of wide angle and high definition, and has good imaging quality; by means of the technical scheme, high-definition imaging can be achieved, the imaging effect can be closer to a shot object, high picture texture, high resolution and high definition of a shot picture are achieved, and it is ensured that the shooting requirements of people are met.

Description

Technical Field

[0001] The present invention relates to the technical field of cameras, and in particular to a wide-angle high-definition camera. Background Art

[0002] With the continuous development of science and technology, the rise of electronic products with imaging functions, the demand for miniaturized photographic lenses is increasing, and people are paying more attention to the improvement and innovation of electronic products. Lenses are more widely used in mobile phones, tablets, drones, computers and other electronic products in life. Various scientific and technological improvements are constantly being introduced, and people's requirements for mobile phone photography are increasing to meet people's photography needs.

[0003] When using current mobile phone cameras, high-definition imaging cannot be achieved because the wide-angle of the optical system is not high-definition enough, making the imaging effect not close to the photographed object itself, resulting in poor image quality, resolution and clarity of the captured image. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the wide-angle of current mobile phone cameras is not high-definition enough, thus resulting in poor picture quality, resolution and clarity of the captured pictures, and to propose a wide-angle high-definition camera.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A wide-angle high-definition camera comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens, wherein the object side surfaces and image side surfaces of the first lens, the second lens, the third lens, the fourth lens and the fifth lens are all aspherical surfaces, and further comprises an aperture arranged between the second lens and the third lens, wherein the first lens and the fifth lens both have negative refractive power, the second lens, the third lens and the fourth lens both have positive refractive power, the object side surfaces of the first lens and the fifth lens are both convex surfaces at the paraxial position, the object side surface of the second lens is a convex surface, the image side surface of the third lens is a convex surface, the object side surface of the fourth lens is a concave surface at the paraxial position, the image side surface of the fourth lens is a convex surface at the paraxial position, the 1.0620<f / R5<1.0680, and the 2.23<V4 / V2<2.53.

[0007] In order to select the range of the distance from the image side surface of the second lens to the object side surface of the third lens on the optical axis and the focal length of the high-definition optical imaging lens, preferably, 2.15<(D23+CT3) / f<2.18.

[0008] In order to select the range of the focal length of the high-definition optical imaging lens and the distance from the first lens to the imaging surface on the optical axis, preferably, the 0.15 <f / TL<0.23。

[0009] In order to select the range of the distance on the optical axis from the object side surface of the first lens to the image side surface of the fifth lens and the interval distance on the optical axis between the first lens and the second lens, preferably, the 4.61 <TD / T12<4.66。

[0010] In order to select the range of the total optical length of the camera optical lens and the focal length of the high-definition optical imaging lens, preferably, the 5.22 <TTL / f<5.36。

[0011] In order to select the range of the sum of the air gap on the optical axis from the image side surface of the third lens to the object side surface of the fourth lens and the air gap between each adjacent lens from the first lens to the fifth lens, preferably, the 1.00 <T34 / AAT<1.56。

[0012] In order to select the focal length of the high-definition optical imaging lens and the range of the focal length of the first lens plus the focal length of the fourth lens, preferably, the 2.26 <f / (f1+f4)<2.89。

[0013] In order to select the range of the focal length of the high-definition optical imaging lens and the combined focal length of the first lens, the second lens and the third lens, preferably, the 0.05 <f / f123<0.09。

[0014] In order to select the range of the focal length of the fifth lens and the central thickness of the fifth lens along the optical axis, preferably, the -23.86 <f5 / CT5<-22.06。

[0015] Compared with the prior art, the present invention provides a wide-angle high-definition camera having the following features:

[0016] Beneficial effects:

[0017] 1. The wide-angle high-definition camera adopts a five-lens design consisting of a first lens, a second lens, a third lens, a fourth lens, a fifth lens and an aperture, and the surface structure of each lens is combined with the optimization range of optical parameters, so that the optical system of the camera has the characteristics of wide-angle high definition and good imaging quality, and can achieve high-definition imaging, so that the imaging effect can be closer to the photographed object itself, thereby achieving high image quality, high resolution and high definition of the captured picture, which can be better adapted to the use of high-imaging quality portable equipment to ensure that people's shooting needs are met.

[0018] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The present invention solves the problem that the wide-angle of the current mobile phone camera is not high-definition enough, which leads to poor picture quality, resolution and clarity of the captured picture. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a plane exploded view of a wide-angle high-definition camera proposed by the present invention;

[0020] Figure 2 Distortion of a wide-angle high-definition camera proposed by the present invention Figure 1 ;

[0021] Figure 3 Axial chromatic aberration curve of a wide-angle high-definition camera proposed by the present invention Figure 1 ;

[0022] Figure 4 Distortion of a wide-angle high-definition camera proposed by the present invention Figure 2 ;

[0023] Figure 5 Axial chromatic aberration curve of a wide-angle high-definition camera proposed by the present invention Figure 2 ;

[0024] Figure 6 Distortion of a wide-angle high-definition camera proposed by the present invention Figure 3 ;

[0025] Figure 7 Axial chromatic aberration curve of a wide-angle high-definition camera proposed by the present invention Figure 3 ;

[0026] Figure 8 Distortion of a wide-angle high-definition camera proposed by the present invention Figure 4 ;

[0027] Fig. 9 Axial chromatic aberration curve of a wide-angle high-definition camera proposed by the present invention Figure 4 .

[0028] In the figure: 1, first lens; 2, second lens; 3, third lens; 4, fourth lens; 5, fifth lens; 6, aperture. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] Embodiment 1:

[0032] Reference Figure 1 The embodiment of the present invention provides a wide-angle high-definition camera, including a first lens 1, a second lens 2, a third lens 3, a fourth lens 4 and a fifth lens 5. The object side surface and the image side surface of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4 and the fifth lens 5 are all aspherical surfaces, and also include an aperture 6 arranged between the second lens 2 and the third lens 3. The aperture 6 is used to control the amount of light passing through the lens. Among them, the first lens 1 and the fifth lens 5 have negative refractive power, and the second lens 2, the third lens 3 and the fourth lens 4 have positive refractive power. The positive and negative refractive power will cause the incident light to diffuse outward, expand the field of view, reduce distortion, and thus optimize the whole The optical performance of the system, the object side surfaces of the first lens 1 and the fifth lens 5 are both convex at the paraxial position, the object side surface of the second lens 2 is convex, the image side surface of the third lens 3 is convex, the object side surface of the fourth lens 4 is concave at the paraxial position, and the image side surface of the fourth lens 4 is convex at the paraxial position, 1.0620<f / R5<1.0680, through the numerical range, the focal length of the high-definition optical imaging lens and the range of the radius of curvature of the object side surface of the fifth lens 5 can be selected, 2.23<V4 / V2<2.53, through the numerical range, the range of the Abbe number of the fourth lens 4 and the Abbe number of the second lens 2 can be selected, wherein, the higher the Abbe number, the less chromatic aberration and the better the image quality.

[0033] Specifically, when in use, through the five-lens design composed of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5 and the aperture 6, and the surface structure of each lens is combined with the optimization range of the optical parameters, the optical system of the camera has the characteristics of wide-angle high definition and good imaging quality, and can achieve high-definition imaging, so that the imaging effect can be closer to the photographed object itself, thereby achieving high image quality, high resolution and high clarity of the captured picture, which can be better adapted to the use of high-imaging quality portable equipment to ensure that people's shooting needs are met.

[0034] The above 2.15<(D23+CT3) / f<2.18.

[0035] Specifically, through the numerical range, the range of the distance from the image side surface of the second lens 2 to the object side surface of the third lens 3 on the optical axis and the focal length of the high-definition optical imaging lens can be selected.

[0036] Above 0.15 <f / TL<0.23。

[0037] Specifically, through the numerical range, the range of the focal length of the high-definition optical imaging lens and the distance from the first lens 1 to the imaging surface on the optical axis can be selected.

[0038] Above 4.61 <TD / T12<4.66。

[0039] Specifically, through the numerical interval, the range of the distance on the optical axis from the object-side surface of the first lens 1 to the image-side surface of the fifth lens 5 and the distance between the first lens 1 and the second lens 2 on the optical axis can be selected.

[0040] 5.22 above <TTL / f<5.36。

[0041] Specifically, the range of the total optical length of the camera optical lens and the focal length of the high-definition optical imaging lens can be selected through the numerical range.

[0042] Above 1.00 <T34 / AAT<1.56。

[0043] Specifically, through the numerical interval, the range of the sum of the air gap on the optical axis from the image side surface of the third lens 3 to the object side surface of the fourth lens 4 and the air gap between each adjacent lens from the first lens 1 to the fifth lens 5 can be selected.

[0044] 2.26 above <f / (f1+f4)<2.89。

[0045] Specifically, through the numerical range, the focal length of the high-definition optical imaging lens and the range of the focal length of the first lens 1 plus the focal length of the fourth lens 4 can be selected.

[0046] Above 0.05 <f / f123<0.09。

[0047] Specifically, through the numerical range, the focal length of the high-definition optical imaging lens and the range of the combined focal length of the first lens 1 , the second lens 2 , and the third lens 3 can be selected.

[0048] Above -23.86 <f5 / CT5<-22.06。

[0049] Specifically, through the numerical interval, the range of the focal length of the fifth lens 5 and the central thickness of the fifth lens 5 along the optical axis can be selected.

[0050] The meanings of “alphanumeric values” in the present invention are as follows:

[0051] f: focal length of high-definition optical imaging lens;

[0052] R5: radius of curvature of the object side of the fifth lens 5;

[0053] V2: Abbe number of the second lens 2;

[0054] V4: Abbe number of the fourth lens 4;

[0055] D23: the distance from the image side of the second lens 2 to the object side of the third lens 3 on the optical axis;

[0056] CT3: thickness of the third lens 3 on the optical axis;

[0057] TL: the distance from the first lens 1 to the imaging surface on the optical axis;

[0058] TD: the distance on the optical axis from the object-side surface of the first lens 1 to the image-side surface of the fifth lens 5;

[0059] T12: the distance between the first lens 1 and the second lens 2 on the optical axis;

[0060] TTL: total optical length of the camera optical lens;

[0061] T34: an air gap on the optical axis from the image side surface of the third lens 3 to the object side surface of the fourth lens 4;

[0062] AAT: the sum of the air gaps between adjacent lenses from the first lens 1 to the fifth lens 5;

[0063] f1: focal length of the first lens 1;

[0064] F4: focal length of the fourth lens 4;

[0065] f5: focal length of the fifth lens 5;

[0066] f123: the combined focal length of the first lens 1, the second lens 2 and the third lens 3;

[0067] CT5: the center thickness of the fifth lens 5 along the optical axis.

[0068] Embodiment 2:

[0069] Based on the first embodiment, the specific parameters selected are f=1.14 mm, Fno=1.59, FOV=163.31° and aspheric coefficient to obtain the following table:

[0070]

[0071]

[0072]

[0073]

[0074]

[0075] Specifically, through the data in the above table, it is possible to generate Figure 2 and Figure 3 .

[0076] Embodiment three:

[0077] Based on the first embodiment, the specific parameters selected are f=1.14 mm, Fno=1.58, FOV=163.62° and aspheric coefficient to obtain the following table:

[0078]

[0079]

[0080]

[0081]

[0082]

[0083] Specifically, through the data in the above table, it is possible to generate Figure 4 and Figure 5 .

[0084] Embodiment 4:

[0085] Based on the first embodiment, the specific parameters selected are f=1.13 mm, Fno=1.58, FOV=165.22° and aspheric coefficient to obtain the following table:

[0086]

[0087]

[0088]

[0089]

[0090]

[0091] Specifically, through the data in the above table, it is possible to generate Figure 6 and Figure 7 .

[0092] Embodiment five:

[0093] Based on the first embodiment, the specific parameters selected are f=1.13 mm, Fno=1.58, FOV=164.99° and aspheric coefficient to obtain the following table:

[0094]

[0095]

[0096]

[0097]

[0098] Specifically, through the data in the above table, it is possible to generate Figure 8 and Fig. 9 .

[0099] In the above table: f represents focal length, Fno represents aperture number, and FOV represents field of view. These three parameters work together in the design of high-pixel telephoto cameras to ensure that users can obtain high-quality images.

[0100] The present invention is achieved by Figure 2 , Figure 4 , Figure 6 as well as Figure 8 The comparison of the changes in the distortion curves shows that the size of the deformation of the object after being imaged by the lens is that the closer the distortion curve is to 0, the closer the image shape is to the shape of the object;

[0101] And, through Figure 3 , Figure 5 , Figure 7 as well as Fig. 9 The mutual comparison of the changes in the central axial chromatic aberration curves shows that each curve represents the focal position of light of different wavelengths after passing through the lens, and the closer the different curves are, the better the chromatic aberration effect of the lens.

[0102] This wide-angle high-definition camera has a five-lens design consisting of a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5 and an aperture 6, and the surface structure of each lens is combined with the optimization range of optical parameters, so that the optical system of the camera has the characteristics of wide-angle high definition and good imaging quality, and can achieve high-definition imaging, so that the imaging effect can be closer to the photographed object itself, thereby achieving high image quality, high resolution and high definition of the captured picture, which can be better adapted to the use of high-imaging quality portable equipment to ensure that people's shooting needs are met.

[0103] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A wide-angle high-definition camera, comprising a first lens (1), a second lens (2), a third lens (3), a fourth lens (4) and a fifth lens (5), characterized in that: The object side surfaces and image side surfaces of the first lens (1), the second lens (2), the third lens (3), the fourth lens (4) and the fifth lens (5) are all aspherical surfaces, and further include a stop (6) disposed between the second lens (2) and the third lens (3). The first lens (1) and the fifth lens (5) both have negative refractive power, the second lens (2), the third lens (3) and the fourth lens (4) all have positive refractive power, the object side surfaces of the first lens (1) and the fifth lens (5) are both convex at the paraxial position, the object side surface of the second lens (2) is a convex surface, the image side surface of the third lens (3) is a convex surface, the object side surface of the fourth lens (4) is a concave surface at the paraxial position, and the image side surface of the fourth lens (4) is a convex surface at the paraxial position, 1.0620<f / R5<1.0680, and 2.23<V4 / V2<2.

53.

2. A wide-angle high-definition camera according to claim 1, characterized in that: The 2.15<(D23+CT3) / f<2.

18.

3. The wide-angle high-definition camera according to claim 1, characterized in that: 0.15 <f / TL<0.23。 4. The wide-angle high-definition camera according to claim 1, characterized in that: 4.61 <TD / T12<4.66。 5. The wide-angle high-definition camera according to claim 1, characterized in that: 5.22 <TTL / f<5.36。 6. The wide-angle high-definition camera according to claim 1, characterized in that: 1.00 <T34 / AAT<1.56。 7. The wide-angle high-definition camera according to claim 1, characterized in that: 2.26 <f / (f1+f4)<2.89。 8. The wide-angle high-definition camera according to claim 1, characterized in that: 0.05 <f / f123<0.09。 9. The wide-angle high-definition camera according to claim 1, characterized in that: -23.86 <f5 / CT5<-22.06。

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