An ultra-small notebook computer imaging system

Abstract

The application discloses the technical field of optical lens and relates to an ultrasmall notebook computer imaging system, which comprises, from an object side to an image side, an aperture, a first lens, a second lens and a third lens, wherein the object side and the image side of each lens are aspherical surfaces; the first lens has positive and negative refractive power, and the object side thereof is a convex surface at a near optical axis; the second lens has negative refractive power, and the object side thereof is a concave surface; and the third lens has positive refractive power, and the image side thereof is a concave surface; the ultrasmall notebook computer imaging system satisfies the following relationship: -0.46 < f / f2 < -0.41 and 2.73 < V3 / V2 < 2.73; f is the focal length of the ultrasmall notebook computer imaging system, f2 is the focal length of the second lens, V2 is the Abbe number of the second lens, and V3 is the Abbe number of the third lens.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical lens, in particular to an ultra-micro laptop imaging system. BACKGROUND

[0002] With the development of science and technology, people have more and more video chat scenes on the network, and the market has higher and higher requirements for the thinness and portability of laptops, and the camera as an accessory of the computer also needs to meet the trend of miniaturization and thinness.

[0003] However, most of the thin lenses on the market have poor imaging quality, and the light quantity is small in dark light conditions, which performs poorly. SUMMARY

[0004] The purpose of the present application is to provide an ultra-micro laptop imaging system to solve the technical problems of poor imaging quality of thin lenses or poor performance in dark light conditions in the prior art.

[0005] To solve the above technical problems, the present application specifically provides an ultra-micro laptop imaging system, which comprises a stop, a first lens, a second lens and a third lens arranged in sequence from the object side to the image side, and the object side and the image side of each lens are aspherical surfaces.

[0006] The first lens has positive and negative refractive power, and the object side surface is convex at the near optical axis.

[0007] The second lens has negative refractive power, and the object side surface is concave.

[0008] The third lens has positive refractive power, and the image side surface is concave.

[0009] The ultra-micro laptop imaging system satisfies the following relationship:

[0010] -0.46

[0011] f is the focal length of the ultra-micro laptop imaging system, f2 is the focal length of the second lens, V2 is the Abbe number of the second lens, and V3 is the Abbe number of the third lens.

[0012] As a preferred scheme of the present application, the ultra-micro laptop imaging system also satisfies the following relationship:

[0013] 0.19

[0014] D23 is 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 CT3 is the thickness of the third lens on the optical axis.

[0015] As a preferred scheme of the present application, the ultra-compact notebook imaging system further satisfies the following relationship:

[0016] 0.69 < f / TL < 0.74;

[0017] TL is the distance from the first lens to the imaging surface on the optical axis.

[0018] As a preferred scheme of the present application, the ultra-compact notebook imaging system further satisfies the following relationship:

[0019] 0.28 < SAG12 / T12 < 0.31;

[0020] SAG12 is the sag of the image side surface of the first lens at the maximum effective radius, and T12 is the air gap on the optical axis between the image side surface of the first lens and the object side surface of the second lens.

[0021] As a preferred scheme of the present application, the ultra-compact notebook imaging system further satisfies the following relationship:

[0022] 1.36 < TTL / f < 1.46;

[0023] TTL is the total optical length of the ultra-compact notebook imaging system.

[0024] As a preferred scheme of the present application, the ultra-compact notebook imaging system further satisfies the following relationship:

[0025] 0.37 < T23 / AAT < 0.50;

[0026] T23 is the air gap on the optical axis between the image side surface of the second lens and the object side surface of the third lens, and AAT is the sum of the air gaps between adjacent lenses.

[0027] As a preferred scheme of the present application, the ultra-compact notebook imaging system further satisfies the following relationship:

[0028] -0.74 < f / (f1+f2) < -0.62;

[0029] f1 is the focal length of the first lens.

[0030] As a preferred scheme of the present application, the ultra-compact notebook imaging system further satisfies the following relationship:

[0031] 0.22 < f / f123 < 0.40;

[0032] f123 is the combined focal length of the first lens, the second lens, and the third lens.

[0033] As a preferred scheme of the present application, the ultra-small notebook computer imaging system further satisfies the following relationship:

[0034] 3.28 < f1 / CT1 < 3.57;

[0035] CT1 is the thickness of the first lens on the optical axis.

[0036] The present application has the following beneficial effects compared with the prior art:

[0037] The ultra-small notebook computer imaging system provided by the present application is a three-piece type lens used by an ultra-small notebook computer, and the surface structure and the optimized range of the optical parameters of each lens are combined, so that the overall size of the imaging lens can be effectively shortened and the light quantity in dark light conditions can be improved while maintaining high imaging quality, and high resolution is achieved due to high pixels. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only exemplary, and other drawings can be obtained by the provided drawings without creative labor for those skilled in the art.

[0039] Figure 1 It is a schematic diagram of the ultra-small notebook computer imaging system in the first embodiment of the present application;

[0040] Figure 2 It is a field curvature and distortion curve diagram of the ultra-small notebook computer imaging system in the first embodiment of the present application;

[0041] Figure 3 It is an axial aberration curve diagram of the ultra-small notebook computer imaging system in the first embodiment of the present application;

[0042] Figure 4 It is a schematic diagram of the ultra-small notebook computer imaging system in the second embodiment of the present application;

[0043] Figure 5 It is a field curvature and distortion curve diagram of the ultra-small notebook computer imaging system in the second embodiment of the present application;

[0044] Figure 6 It is an axial aberration curve diagram of the ultra-small notebook computer imaging system in the second embodiment of the present application;

[0045] Figure 7 It is a schematic diagram of the ultra-small notebook computer imaging system in the third embodiment of the present application;

[0046] Figure 8The field curvature and distortion curve diagram of the super-micro laptop imaging system of the third embodiment of the present application;

[0047] Figure 9 The axial aberration curve diagram of the super-micro laptop imaging system of the third embodiment of the present application;

[0048] Figure 10 The schematic diagram of the super-micro laptop imaging system of the fourth embodiment of the present application;

[0049] Figure 11 The field curvature and distortion curve diagram of the super-micro laptop imaging system of the fourth embodiment of the present application;

[0050] Figure 12 The axial aberration curve diagram of the super-micro laptop imaging system of the fourth embodiment of the present application;

[0051] Figure 13 The schematic diagram of the super-micro laptop imaging system of the fifth embodiment of the present application;

[0052] Figure 14 The field curvature and distortion curve diagram of the super-micro laptop imaging system of the fifth embodiment of the present application;

[0053] Figure 15 The axial aberration curve diagram of the super-micro laptop imaging system of the fifth embodiment of the present application.

[0054] The numbers in the figures respectively represent the following:

[0055] Diaphragm: 101, 201, 301, 401, 501;

[0056] First lens: 102, 202, 302, 402, 502;

[0057] Second lens: 103, 203, 303, 403, 503;

[0058] Third lens: 104, 204, 304, 404, 504;

[0059] Infrared filter: 105, 205, 305, 405, 505. DETAILED DESCRIPTION

[0060] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0061] The application specifically provides an ultrasmall notebook computer imaging system, which comprises, from an object side to an image side, an aperture stop, a first lens, a second lens and a third lens, and the object side and the image side of each lens are aspherical surfaces.

[0062] The first lens has positive and negative refractive power, and the object side surface thereof is a convex surface at a near optical axis.

[0063] The second lens has negative refractive power, and the object side surface thereof is a concave surface.

[0064] The third lens has positive refractive power, and the image side surface thereof is a concave surface.

[0065] The ultrasmall notebook computer imaging system satisfies the following relationship:

[0066] -0.46 < f / f2 < -0.41, and 2.73 < V3 / V2 < 2.73.

[0067] f is the focal length of the ultrasmall notebook computer imaging system, f2 is the focal length of the second lens, V2 is the Abbe number of the second lens, and V3 is the Abbe number of the third lens.

[0068] The ultrasmall notebook computer imaging system provided by the application is a three-piece ultrasmall lens for a notebook computer, the surface structure of each lens is combined with the optimized range of optical parameters, the overall size of the imaging lens can be effectively shortened while maintaining high imaging quality, the light quantity in a dark light condition is improved, and high resolution is obtained due to high pixels.

[0069] As a preferred scheme of the application, the ultrasmall notebook computer imaging system further satisfies the following relationship:

[0070] 0.19 < (D23+CT3) / f < 0.23.

[0071] D23 is the distance on the optical axis from the image side surface of the second lens to the object side surface of the third lens, and CT3 is the thickness of the third lens on the optical axis.

[0072] As a preferred scheme of the application, the ultrasmall notebook computer imaging system further satisfies the following relationship:

[0073] 0.69 < f / TL < 0.74.

[0074] TL is the distance on the optical axis from the first lens to an imaging surface.

[0075] As a preferred scheme of the application, the ultrasmall notebook computer imaging system further satisfies the following relationship:

[0076] 0.28 < SAG12 / T12 < 0.31.

[0077] SAG12 is the sag of the image side surface of the first lens at the maximum effective radius, and T12 is the air gap on the optical axis between the image side surface of the first lens and the object side surface of the second lens.

[0078] As a preferred scheme of the present application, the super-miniature notebook computer imaging system further satisfies the following relationship:

[0079] 1.36 < TTL / f < 1.46;

[0080] TTL is the total optical length of the super-miniature notebook computer imaging system.

[0081] As a preferred scheme of the present application, the super-miniature notebook computer imaging system further satisfies the following relationship:

[0082] 0.37 < T23 / AAT < 0.50;

[0083] T23 is the air gap on the optical axis between the image side surface of the second lens and the object side surface of the third lens, and AAT is the sum of the air gaps between the adjacent lenses.

[0084] As a preferred scheme of the present application, the super-miniature notebook computer imaging system further satisfies the following relationship:

[0085] -0.74 < f / (f1+f2) < -0.62;

[0086] f1 is the focal length of the first lens.

[0087] As a preferred scheme of the present application, the super-miniature notebook computer imaging system further satisfies the following relationship:

[0088] 0.22 < f / f123 < 0.40;

[0089] f123 is the combined focal length of the first lens, the second lens and the third lens.

[0090] As a preferred scheme of the present application, the super-miniature notebook computer imaging system further satisfies the following relationship:

[0091] 3.28 < f1 / CT1 < 3.57;

[0092] CT1 is the thickness of the first lens on the optical axis.

[0093] Embodiment One

[0094] Please refer to the accompanying drawings Figures 1 to 3 , Figure 1 shows a schematic diagram of the super-miniature notebook computer imaging system of embodiment one, Figure 2The field curvature and distortion curves of the super-miniature notebook computer imaging system of embodiment one are shown in the following figures from left to right, Figure 3 The axial aberration curves of the super-miniature notebook computer imaging system of embodiment one are shown in the following figures.

[0095] The super-miniature notebook computer imaging system of embodiment one comprises, in order from the object side to the image side, a diaphragm 101, a first lens 102, a second lens 103, and a third lens 104, and the object side and the image side of each lens are aspherical surfaces.

[0096] The surface shapes of each lens are as follows:

[0097] The first lens 102 has positive and negative refractive power, and the object side surface thereof is a convex surface at the near optical axis.

[0098] The second lens 103 has negative refractive power, and the object side surface thereof is a concave surface.

[0099] The third lens 104 has positive refractive power, and the image side surface thereof is a concave surface.

[0100] In the super-miniature notebook computer imaging system, the diaphragm 101 is located on the object side of the first lens 102, which is beneficial to reducing the front aperture, thereby achieving the effect of reducing the size of the optical imaging system.

[0101] The super-miniature notebook computer imaging system further comprises an infrared filter 105, which is arranged between the third lens 104 and the imaging surface. The infrared filter 105 filters out the infrared band light entering the lens, so as to avoid the noise caused by the infrared light irradiating the photosensitive chip. Specifically, the infrared filter 105 can be made of glass to avoid affecting the focal length.

[0102] For reference, please refer to Table 1-1 and Table 1-2 below.

[0103]

[0104]

[0105]

[0106] Table 1-1 is the detailed structure data of embodiment one, wherein the units of the curvature radius, the thickness, and the focal length are millimeters, f is the focal length of the super-miniature notebook computer imaging system, Fno is the aperture value, and FOV is the maximum field of view angle of the super-miniature notebook computer imaging system.

[0107] Surface 0 to 10 represent the surfaces from the object side to the image side in order, wherein surface 1-10 represent the diaphragm, the first lens object surface, the first lens image surface, the second lens object surface, the second lens image surface, the third lens object surface, the third lens image surface, the infrared filter object surface, the infrared filter image surface, and the imaging surface in order.

[0108] Table 1-2 is the aspherical surface coefficient data in Example 1, wherein k represents the conic coefficient in the aspherical surface equation, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22 represent the 4th, 6th, 8th, 10th, 12th, 14th, 16th, 18th, 20th, 22nd order aspherical surface coefficients of each surface.

[0109] Example 2

[0110] Please refer to the following table Figures 4 to 6 , Figure 4 Fig. 2 shows a schematic diagram of the ultra-compact notebook computer imaging system in Example 2, Figure 5 Fig. 3 shows the field curvature and distortion curves of the ultra-compact notebook computer imaging system in Example 2 from left to right, Figure 6 Fig. 4 is an axial aberration curve of the ultra-compact notebook computer imaging system in Example 2.

[0111] The ultra-compact notebook computer imaging system in Example 2 includes, from the object side to the image side, an aperture 201, a first lens 202, a second lens 203, and a third lens 204, and the object side and the image side of each lens are aspherical surfaces.

[0112] The surface shape of each lens is as follows:

[0113] The first lens 202 has positive and negative refractive power, and the object side surface thereof is convex near the optical axis.

[0114] The second lens 203 has negative refractive power, and the object side surface thereof is concave.

[0115] The third lens 204 has positive refractive power, and the image side surface thereof is concave.

[0116] In the ultra-compact notebook computer imaging system, the aperture 201 is located on the object side of the first lens 202, which is beneficial to reducing the front aperture, thereby achieving the effect of reducing the size of the optical imaging system.

[0117] Please refer to Table 2-1 and Table 2-2 below.

[0118]

[0119]

[0120]

[0121] Example 3

[0122] Please refer to the following table Figures 7 to 9 , Figure 7 Fig. 5 shows a schematic diagram of the ultra-compact notebook computer imaging system in Example 3, Figure 8Fig. 3-2 shows the field curvature and distortion curves of the ultra-compact notebook computer imaging system of embodiment three from left to right in sequence, Figure 9 Fig. 3-3 is an axial aberration curve of the ultra-compact notebook computer imaging system of embodiment three.

[0123] The ultra-compact notebook computer imaging system of embodiment three comprises, in sequence from the object side to the image side, an aperture 301, a first lens 302, a second lens 303, and a third lens 304, and the object side and the image side of each lens are aspherical surfaces;

[0124] The surface shapes of the lenses are as follows:

[0125] The first lens 302 has positive and negative refractive power, and the object side surface thereof is convex near the optical axis;

[0126] The second lens 303 has negative refractive power, and the object side surface thereof is concave;

[0127] The third lens 304 has positive refractive power, and the image side surface thereof is concave;

[0128] In the ultra-compact notebook computer imaging system, the aperture 301 is located on the object side of the first lens 303, which is beneficial to reducing the front aperture, thereby achieving the effect of reducing the size of the optical imaging system.

[0129] Please refer to Table 3-1 and Table 3-2 below.

[0130]

[0131]

[0132]

[0133] Embodiment four

[0134] Please refer to Table 4-1 and Table 4-2 below. Figures 10 to 12 Figure 10 Fig. 4-1 shows a schematic diagram of the ultra-compact notebook computer imaging system of embodiment four, Figure 11 Fig. 4-2 shows the field curvature and distortion curves of the ultra-compact notebook computer imaging system of embodiment four from left to right in sequence, Figure 12 Fig. 4-3 is an axial aberration curve of the ultra-compact notebook computer imaging system of embodiment four.

[0135] The ultra-compact notebook computer imaging system of embodiment four comprises, in sequence from the object side to the image side, an aperture 401, a first lens 402, a second lens 403, and a third lens 404, and the object side and the image side of each lens are aspherical surfaces;

[0136] The surface shapes of the lenses are as follows:

[0137] The first lens 402 has positive and negative refractive power, and the object side surface thereof is convex near the optical axis;​

[0138] The second lens 403 has negative refractive power, and its object side surface is concave;

[0139] The third lens 404 has positive refractive power, and its image side surface is concave;

[0140] In the ultra-compact notebook computer imaging system, the diaphragm 401 is located on the object side surface of the first lens 402, which is beneficial to reduce the front aperture, thereby achieving the effect of reducing the size of the optical imaging system.

[0141] For reference, please refer to Table 4-1 and Table 4-2 below.

[0142]

[0143]

[0144]

[0145] Example Five

[0146] Please refer to the schematic diagram of the ultra-compact notebook computer imaging system of Example Five, Figures 13 to 15 , Figure 13 The schematic diagram of the ultra-compact notebook computer imaging system of Example Five is shown, Figure 14 The field curvature and distortion curve diagram of the ultra-compact notebook computer imaging system of Example Five from left to right is shown, Figure 15 The axial aberration curve diagram of the ultra-compact notebook computer imaging system of Example Five.

[0147] The ultra-compact notebook computer imaging system in Example Five includes a diaphragm 501, a first lens 502, a second lens 503, and a third lens 504 arranged in order from the object side to the image side, and the object side surface and the image side surface of each lens are aspherical surfaces;

[0148] The lens surface types are as follows:

[0149] The first lens 502 has positive and negative refractive power, and its object side surface is convex near the optical axis;

[0150] The second lens 503 has negative refractive power, and its object side surface is concave;

[0151] The third lens 504 has positive refractive power, and its image side surface is concave;

[0152] In the ultra-compact notebook computer imaging system, the diaphragm 501 is located on the object side surface of the first lens 502, which is beneficial to reduce the front aperture, thereby achieving the effect of reducing the size of the optical imaging system.

[0153] For reference, please refer to Table 5-1 and Table 5-2 below.

[0154]

[0155]

[0156]

[0157] The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application. The scope of protection of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and such modifications or equivalent replacements should also be considered to fall within the protection scope of the present application.

Claims

1. An ultra-miniature laptop imaging system, characterized in that, It consists of an aperture stop, a first lens, a second lens, and a third lens arranged sequentially from the object side to the image side. The object side and image side of each lens are aspherical. The first lens has positive and negative refractive forces, and its object-side surface is convex near the optical axis. The second lens has negative refractive power and its object-side surface is concave. The third lens has positive refractive power, and its image-side surface is concave. The ultra-miniature laptop imaging system satisfies the following relationship: -0.46<f / f2<-0.41, V3 / V2=2.73; f is the focal length of the ultra-small laptop imaging system, f2 is the focal length of the second lens, V2 is the Abbe number of the second lens, and V3 is the Abbe number of the third lens. The ultra-miniature laptop imaging system also satisfies the following relationship: ； TL is the distance from the first lens to the imaging surface along the optical axis; The ultra-miniature laptop imaging system also satisfies the following relationship: ； SAG12 is the sag of the image-side surface of the first lens at the maximum effective radius, and T12 is the air gap on the optical axis between the image-side surface of the first lens and the object-side surface of the second lens. The ultra-miniature laptop imaging system also satisfies the following relationship: ； TTL is the total optical length of the ultra-miniature laptop imaging system.

2. The ultra-miniature laptop imaging system according to claim 1, characterized in that, The ultra-miniature laptop imaging system also satisfies the following relationship: ； D23 is the distance on the optical axis from the image side of the second lens to the object side of the third lens, and CT3 is the thickness of the third lens on the optical axis.

3. The ultra-miniature laptop imaging system according to claim 1, characterized in that, The ultra-miniature laptop imaging system also satisfies the following relationship: ； T23 is the air gap on the optical axis between the image side of the second lens and the object side of the third lens, and AAT is the sum of the air gaps between adjacent lenses.

4. The ultra-miniature laptop imaging system according to claim 1, characterized in that, The ultra-miniature laptop imaging system also satisfies the following relationship: ； f1 is the focal length of the first lens.

5. The ultra-miniature laptop imaging system according to claim 1, characterized in that, The ultra-miniature laptop imaging system also satisfies the following relationship: ； CT1 is the thickness of the first lens on the optical axis.

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