High-pixel long-focus camera

Abstract

The invention discloses a high-pixel long-focus camera, and belongs to the technical field of cameras. A high-pixel long-focus camera comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens, 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, and the high-pixel long-focus camera further comprises a diaphragm arranged in front of the first lens; according to the invention, the five-lens design composed of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the diaphragm is adopted, and the surface shape structure of each lens is combined with the optimal range of optical parameters, so that the camera has the characteristic of long focal length, and has better imaging quality; according to the invention, high-definition long-range shooting can be realized, so that the periphery of a shot image is not easy to distort and deform, and the imaging effect of a photo is greatly improved.

Description

Technical Field

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

[0002] With the continuous development of science and technology, people pay more attention to the improvement and innovation of electronic products. Mobile phones, tablet computers, drones, computers and other electronic products are more widely used in life. With the continuous improvement of various scientific and technological advances, people's requirements for mobile phone photography are also increasing to meet people's photography needs.

[0003] When current mobile phone cameras are used to shoot distant scenes, the surroundings of the captured images are easily distorted due to the long distance of the distant objects, which in turn affects the clarity, resolution and image quality of the captured images, resulting in the captured images being unable to be close to the photographed objects themselves, thus affecting the imaging effect of the photo. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the clarity, resolution and image quality of the images taken by the current camera during the shooting process are poor, resulting in the captured image being unable to be closer to the photographed object itself, thus affecting the photo imaging effect, and to propose a high-pixel telephoto camera.

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

[0006] A high-pixel telephoto 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 in front of the first lens, wherein the first lens and the third lens have positive refractive power, the second lens, the fourth lens and the fifth lens have negative refractive power, the object side surfaces of the first lens and the fifth lens are both convex surfaces, the object side surfaces of the second lens and the fourth lens are both concave surfaces, the image side surface of the third lens is convex, the image side surface of the fourth lens is concave, the -0.243<f / R3<-0.146, and the 2.383<V1-V2<2.383.

[0007] In order to select the range of the curvature radius of the object side surfaces of the first lens and the second lens, preferably, -0.62<(R1+R2) / (R1-R2)<-0.612.

[0008] In order to select the range of the sum of the center thicknesses of the first lens, the second lens, the third lens, and the fourth lens and the range of the total optical length of the camera optical lens, preferably, 0.559<(Ct1+Ct4+Ct6+Ct8) / TTL<0.569.

[0009] In order to select the range of the center thickness of the first lens and the range of the center thickness of the second lens, preferably, the 0.753 <ct1 / ct2<0.785。

[0010] In order to select the focal length range of the high-definition optical imaging lens and the range of the total optical length of the camera optical lens, preferably, the 1.034 <TTL / f<1.051。

[0011] In order to select the distance range between the object side vertex of the first lens and the imaging surface and the diagonal length range of the maximum viewing angle of the lens group on the imaging surface, preferably, the 1.562 <TL / Dg<1.586。

[0012] In order to select the focal length range of the combination of the second lens and the third lens and the focal length range of the fourth lens, preferably, the 1.370 <f23 / f4<1.425。

[0013] In order to select the range of the center thickness of the fourth lens along the optical axis and the range of the center thickness of the fifth lens along the optical axis, preferably, the 4.616 <CT4 / CT5<5.697。

[0014] In order to select the focal length range of the first lens and the second lens combined and the focal length range of the fifth lens, preferably, the 1.495 <f12 / f5<1.675。

[0015] Compared with the prior art, the present invention provides a high-pixel telephoto camera, which has the following beneficial effects:

[0016] 1. The high-pixel telephoto 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 combines the surface structure of each lens with the optimization range of optical parameters, so that the camera has the characteristics of a long focal length and good imaging quality, and can achieve high-definition long-range shooting, so that the surroundings of the captured image are not easily distorted, thereby improving the clarity, resolution and image quality of the captured image, so that the captured image can be closer to the captured object itself, thereby greatly improving the imaging effect of the photo.

[0017] 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 clarity, resolution and image quality of the images taken by the current camera during the shooting process are poor, resulting in the captured image being unable to be closer to the photographed object itself, thus affecting the photo imaging effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is a planar exploded view of a high-pixel telephoto camera proposed by the present invention;

[0019] Figure 2 Distortion of a high-pixel telephoto camera proposed by the present invention Figure 1 ;

[0020] Figure 3 Axial chromatic aberration curve of a high-pixel telephoto camera proposed by the present invention Figure 1 ;

[0021] Figure 4 Distortion of a high-pixel telephoto camera proposed by the present invention Figure 2 ;

[0022] Figure 5 Axial chromatic aberration curve of a high-pixel telephoto camera proposed by the present invention Figure 2 ;

[0023] Figure 6 Distortion of a high-pixel telephoto camera proposed by the present invention Figure 3 ;

[0024] Figure 7 Axial chromatic aberration curve of a high-pixel telephoto camera proposed by the present invention Figure 3 ;

[0025] Figure 8 Distortion of a high-pixel telephoto camera proposed by the present invention Figure 4 ;

[0026] Fig. 9 Axial chromatic aberration curve of a high-pixel telephoto camera proposed by the present invention Figure 4 ;

[0027] Fig.10 Distortion of a high-pixel telephoto camera proposed by the present invention Figure 5 ;

[0028] Fig.11 Axial chromatic aberration curve of a high-pixel telephoto camera proposed by the present invention Figure 5 .

[0029] In the figure: 1, first lens; 2, second lens; 3, third lens; 4, fourth lens; 5, fifth lens; 6, aperture. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] Embodiment 1:

[0033] Reference Figure 1 , an embodiment of the present invention provides a high-pixel telephoto camera, comprising a first lens 1, a second lens 2, a third lens 3, a fourth lens 4 and a fifth lens 5, wherein 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 comprising an aperture 6 arranged in front of the first lens 1, for controlling the amount of light passing through the lens, wherein the first lens 1 and the third lens 3 both have positive refractive power, and the second lens 2, the fourth lens 4 and the fifth lens 5 both have negative refractive power, the positive and negative refractive power can diffuse the incident light outward, expand the field of view, reduce distortion, and thus optimize the optical performance of the entire system, the object side surfaces of the first lens 1 and the fifth lens 5 are both convex surfaces, the object side surfaces of the second lens 2 and the fourth lens 4 are both concave surfaces, the image side surface of the third lens 3 is convex, and the image side surface of the fourth lens 4 is concave, -0.243<f / R3<-0.146, 2.383<V1-V2<2.383.

[0034] Specifically, when in use, by adopting 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 combining the surface structure of each lens with the optimization range of optical parameters, the camera has the characteristics of a long focal length and good imaging quality, and can achieve high-definition long-range shooting, making it less likely for the surroundings of the captured image to be distorted, thereby improving the clarity, resolution and image quality of the captured image, making the captured image closer to the object itself, thereby greatly improving the imaging effect of the photo.

[0035] The above -0.62<(R1+R2) / (R1-R2)<-0.612.

[0036] Specifically, the range of the curvature radius of the object side surfaces of the first lens 1 and the second lens 2 can be selected through the numerical range.

[0037] The above 0.559<(Ct1+Ct4+Ct6+Ct8) / TTL<0.569.

[0038] Specifically, through the numerical interval, the range of the sum of the center thicknesses of the first lens 1 , the second lens 2 , the third lens 3 , and the fourth lens 4 and the range of the total optical length of the camera optical lens can be selected.

[0039] Above 0.753 <ct1 / ct2<0.785。

[0040] Specifically, through the numerical interval, the range of the center thickness of the first lens 1 and the range of the center thickness of the second lens 2 can be selected.

[0041] 1.034 above <TTL / f<1.051。

[0042] Specifically, through the numerical range, the focal length range of the high-definition optical imaging lens can be selected, and the range of the total optical length of the camera optical lens can also be selected.

[0043] Above 1.562 <TL / Dg<1.586。

[0044] Specifically, through the numerical interval, the distance range between the object side vertex of the first lens 1 and the imaging plane can be selected, and the diagonal length range of the maximum viewing angle of the lens group on the image plane can also be selected.

[0045] Above 1.370 <f23 / f4<1.425。

[0046] Specifically, through the numerical range, the focal length range of the combination of the second lens 2 and the third lens 3 can be selected, and the focal length range of the fourth lens 4 can also be selected.

[0047] Above 4.616 <CT4 / CT5<5.697。

[0048] Specifically, through the numerical interval, the range of the center thickness of the fourth lens 4 along the optical axis can be selected, and the range of the center thickness of the fifth lens 5 along the optical axis can also be selected.

[0049] Above 1.495 <f12 / f5<1.675。

[0050] Specifically, through the numerical range, the focal length range of the first lens 1 and the second lens 2 combined can be selected, and the focal length range of the fifth lens 5 can also be selected.

[0051] The meanings of “alphanumeric values” in the present invention are as follows:

[0052] f: focal length of high-definition optical imaging lens;

[0053] R3: the radius of curvature of the object side of the third lens 3;

[0054] V1: Abbe number of the first lens 1;

[0055] V2: Abbe coefficient of the second lens 2;

[0056] R1: the radius of curvature of the object side surface of the first lens 1;

[0057] R2: the radius of curvature of the object side of the second lens 2;

[0058] CT1+CT4+CT6+CT8: the sum of the center thicknesses of the first lens 1, the second lens 2, the third lens 3, and the fourth lens 4;

[0059] TTL: total optical length of the camera optical lens;

[0060] CT1: center thickness of the first lens 1;

[0061] CT2: center thickness of the second lens 2;

[0062] TL: distance between the object side vertex of the first lens 1 and the imaging surface;

[0063] Dg: The diagonal length of the image plane at the maximum viewing angle of the lens group;

[0064] f23: focal length of the combination of the second lens 2 and the third lens 3;

[0065] f4: focal length of the fourth lens 4;

[0066] CT4: the center thickness of the fourth lens 4 along the optical axis;

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

[0068] f12: the focal length of the first lens 1 and the second lens 2 combined;

[0069] f5: focal length of the fifth lens 5.

[0070] Embodiment 2:

[0071] Based on the first embodiment, the specific parameters selected are f=10.53 mm, Fno=2.50, FOV=35.33° and aspheric coefficient to obtain the following table:

[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=10.44 mm, Fno=2.50, FOV=35.41° and aspheric coefficient to obtain the following table:

[0078]

[0079]

[0080]

[0081]

[0082] Specifically, through the data in the above table, it is possible to generate Figure 4 and Figure 5 .

[0083] Embodiment 4:

[0084] Based on the first embodiment, the specific parameters selected are f=10.20 mm, Fno=2.50, FOV=36.13° and aspheric coefficient to obtain the following table:

[0085]

[0086]

[0087]

[0088]

[0089] Specifically, through the data in the above table, it is possible to generate Figure 6 and Figure 7 .

[0090] Embodiment five:

[0091] Based on the first embodiment, the specific parameters selected are f=10.37 mm, Fno=2.50, FOV=35.55° and aspheric coefficient to obtain the following table:

[0092]

[0093]

[0094]

[0095] Specifically, through the data in the above table, it is possible to generate Figure 8 and Fig. 9 .

[0096] Embodiment six:

[0097] Based on the first embodiment, the specific parameters selected are f=10.39 mm, Fno=2.50, FOV=35.66° and aspheric coefficient to obtain the following table:

[0098]

[0099]

[0100]

[0101] Specifically, through the data in the above table, it is possible to generate Fig.10 and Fig.11 .

[0102] 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.

[0103] The present invention is achieved by Figure 2 , Figure 4 , Figure 6 , Figure 8 as well as Fig.10 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;

[0104] And, through Figure 3 , Figure 5 , Figure 7 , Fig. 9 as well as Fig.11 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.

[0105] The high-pixel telephoto 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. By combining the surface structure of each lens with the optimized range of optical parameters, the camera has the characteristics of a long focal length and good imaging quality, and can achieve high-definition long-range shooting, making it less likely for the surroundings of the captured image to be distorted, thereby improving the clarity, resolution and image quality of the captured image, making the captured image closer to the captured object itself, thereby greatly improving the imaging effect of the photo.

[0106] 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 high-pixel telephoto 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) arranged in front of the first lens (1). The first lens (1) and the third lens (3) both have positive refractive power, the second lens (2), the fourth lens (4) and the fifth lens (5) all have negative refractive power, the object side surfaces of the first lens (1) and the fifth lens (5) are both convex, the object side surfaces of the second lens (2) and the fourth lens (4) are both concave, the image side surface of the third lens (3) is convex, the image side surface of the fourth lens (4) is concave, -0.243<f / R3<-0.146, and 2.383<V1-V2<2.

383.

2. A high-pixel telephoto camera according to claim 1, characterized in that: The -0.62<(R1+R2) / (R1-R2)<-0.

612.

3. The high-pixel telephoto camera according to claim 1, characterized in that: The 0.559<(Ct1+Ct4+Ct6+Ct8) / TTL<0.

569.

4. The high-pixel telephoto camera according to claim 1, characterized in that: 0.753 <ct1 / ct2<0.785。 5. The high-pixel telephoto camera according to claim 1, characterized in that: 1.034 <TTL / f<1.051。 6. The high-pixel telephoto camera according to claim 1, characterized in that: 1.562 <TL / Dg<1.586。 7. The high-pixel telephoto camera according to claim 1, characterized in that: 1.370 <f23 / f4<1.425。 8. The high-pixel telephoto camera according to claim 1, characterized in that: 4.616 <CT4 / CT5<5.697。 9. The high-pixel telephoto camera according to claim 1, characterized in that: 1.495 <f12 / f5<1.675。

Images