An optical camera lens

Abstract

The present invention discloses an optical imaging lens, which sequentially includes, from the object side to the image side along the optical axis: a diaphragm; a first lens with positive optical power, whose object side is convex and image side is convex; a second lens; a third lens; and a filter; wherein, half of the maximum field of view of the optical imaging lens, Semi-FOV, and the effective focal length f of the optical imaging lens satisfy: tan(Semi-FOV)×f < 1 mm; the distance TTL from the object side of the first lens of the optical imaging lens to the imaging plane on the optical axis, half of the diagonal length ImgH of the effective pixel region on the imaging plane, and the effective focal length f of the optical imaging lens satisfy: 1 < TTL / ImgH×f < 2.06; the F number Fno of the optical imaging lens satisfies: 1.65 < Fno < 2.2. The optical imaging lens provided by the present invention is small in size, which is beneficial to integration on portable electronic devices, has low cost, high imaging quality, and can achieve excellent face recognition function under low light conditions in combination with an infrared fill light.

Description

Technical Field

[0001] The present invention belongs to the field of optical imaging, and particularly relates to an optical camera lens including three lenses. Background Art

[0002] With the development of portable electronic devices, there are not only increasingly high requirements for taking pictures and videos, but also more requirements for other convenient operations, such as fingerprint recognition, face recognition, etc.

[0003] Therefore, a visible-infrared confocal miniaturized lens that can be used in portable electronic devices and combines shooting and face recognition is needed. The small size of this camera lens is beneficial for integration into portable electronic devices, and it has low cost, high imaging quality, and can achieve excellent face recognition function under low-light conditions in combination with an infrared fill light. Summary of the Invention

[0004] The present invention aims to provide an optical camera lens composed of three lenses. The small size of this camera lens is beneficial for integration into portable electronic devices, and it has low cost, high imaging quality, and can achieve excellent face recognition function under low-light conditions in combination with an infrared fill light.

[0005] One aspect of the present invention provides an optical camera lens, which sequentially includes, from the object side to the image side along the optical axis: a diaphragm; a first lens with positive optical power, whose object side is convex and image side is convex; a second lens; a third lens; and a filter.

[0006] Wherein, half of the maximum field of view angle of the optical camera lens Semi-FOV and the effective focal length f of the optical camera lens satisfy: tan(Semi-FOV)×f < 1 mm; the distance TTL from the object side of the first lens of the optical camera lens to the imaging plane on the optical axis, half of the diagonal length ImgH of the effective pixel area on the imaging plane, and the effective focal length f of the optical camera lens satisfy: 1 < TTL / ImgH×f < 2.06; the F number Fno of the optical camera lens satisfies: 1.65 < Fno < 2.2.

[0007] According to an embodiment of the present invention, the sum ∑AT of the air gaps on the optical axis between any two adjacent lenses with optical power among the first lens to the third lens satisfies: ∑AT×10 ≤ 2.53 mm.

[0008] According to an embodiment of the present invention, the effective focal length f of the optical camera lens and the entrance pupil diameter EPD of the optical camera lens satisfy: 1.6 < f / EPD < 2.2.

[0009] According to an embodiment of the present invention, half of the diagonal length ImgH of the effective pixel area on the imaging plane satisfies: ImgH < 1 mm.

[0010] According to one embodiment of the present invention, the distance TTL from the object side of the first lens of the optical camera lens to the imaging plane on the optical axis and half of the maximum field of view of the optical camera lens Semi-FOV meet the following conditions: 1 mm <TTL / tan(Semi-FOV)≤2.03mm。

[0011] According to one embodiment of the present invention, the center thickness CT1 of the first lens on the optical axis, the air gap T12 between the first lens and the second lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, and the axial distance SL from the aperture to the imaging plane satisfy: 0<(CT1+T12+CT2) / SL≤0.54.

[0012] According to one embodiment of the present invention, the on-axis distance SAG32 between the intersection of the image side surface of the third lens and the optical axis to the vertex of the effective radius of the image side surface of the third lens, the on-axis distance SAG31 between the intersection of the object side surface of the third lens and the optical axis to the vertex of the effective radius of the object side surface of the third lens, and the sum ∑AT of the air gaps on the optical axis between any two adjacent lenses with optical focal power from the first lens to the third lens satisfy: 0<|SAG32-SAG31| / ∑AT<1.5.

[0013] According to one embodiment of the present invention, the working wavelength band of the optical camera lens is between 470nm and 850nm.

[0014] According to one embodiment of the present invention, the on-axis distance SAG22 between the intersection of the image side surface of the second lens and the optical axis to the effective radius vertex of the image side surface of the second lens and the maximum effective radius DT22 of the image side surface of the second lens satisfy: -0.5 <SAG22 / DT22<0。

[0015] According to one embodiment of the present invention, the effective focal length f1 of the first lens and the effective focal length f of the optical camera lens satisfy the following conditions: 0.3 <f1 / f<1.5。

[0016] According to one embodiment of the present invention, a curvature radius R1 of the object side surface of the first lens and a curvature radius R2 of the image side surface of the first lens satisfy: 0<|R1 / R2|<3.

[0017] According to one embodiment of the present invention, the maximum effective radius DT21 of the object side surface of the second lens and the maximum effective radius DT12 of the image side surface of the first lens satisfy: 1≤DT21 / DT12<1.5.

[0018] According to one embodiment of the present invention, the maximum effective radius DT32 of the image side surface of the third lens and the maximum effective radius DT11 of the object side surface of the first lens satisfy: 2 <DT32 / DT11<3.1。

[0019] According to an embodiment of the present invention, the air gap T23 between the second lens and the third lens on the optical axis and the central thickness CT2 of the second lens on the optical axis satisfy: 0 < T23 / CT2 < 0.5.

[0020] According to an embodiment of the present invention, the central thickness CT2 of the second lens on the optical axis and the central thickness CT3 of the third lens on the optical axis satisfy: 0 < CT2 / CT3 < 1.

[0021] According to an embodiment of the present invention, the central thickness CT3 of the third lens on the optical axis and the central thickness CT1 of the first lens on the optical axis satisfy: 0 < CT3 / CT1 < 2.

[0022] According to an embodiment of the present invention, the focal plane position F1 of the optical imaging lens in the visible light band and the focal plane position F2 of the optical imaging lens in the near infrared satisfy: |F1 - F2| < 20um.

[0023] According to an embodiment of the present invention, the filter is a band-pass filter, and its band-pass wavelength range is between 430nm and 900nm.

[0024] Another aspect of the present invention provides an optical imaging lens, which sequentially includes, from the object side to the image side along the optical axis: a diaphragm; a first lens with positive optical power, whose object side is convex and image side is convex; a second lens; a third lens; and a filter.

[0025] Among them, each lens is independent of each other, and there is an air gap between each lens on the optical axis; half of the maximum field of view angle Semi-FOV of the optical imaging lens and the effective focal length f of the optical imaging lens satisfy: tan(Semi-FOV) × f < 1mm; the distance TTL from the object side of the first lens of the optical imaging lens to the imaging plane on the optical axis, half of the diagonal length ImgH of the effective pixel area on the imaging plane, and the effective focal length f of the optical imaging lens satisfy: 1 < TTL / ImgH × f < 2.06; the central thickness CT1 of the first lens on the optical axis, the air gap T12 between the first lens and the second lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, and the axial distance SL from the diaphragm to the imaging plane satisfy: 0 < (CT1 + T12 + CT2) / SL ≤ 0.54.

[0026] Advantages of the present invention:

[0027] The optical imaging lens provided by the present invention includes multiple lenses, such as the first lens to the third lens. The optical imaging lens of the present invention is small in volume, which is beneficial for integration on portable electronic devices, has low cost, high imaging quality, and can achieve excellent face recognition function under low light conditions in combination with an infrared fill light. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 Schematic diagram of the structure of the lens group of the optical camera lens embodiment 1 of the present invention;

[0030] Figure 2a to Figure 2d They are respectively an astigmatism curve, a distortion curve, a diffraction through-focus MTF curve in the visible light band, and a diffraction through-focus MTF curve in the infrared light band of the optical camera lens embodiment 1 of the present invention;

[0031] Figure 3 Schematic diagram of the lens group structure of Embodiment 2 of the optical camera lens of the present invention;

[0032] Figures 4a to 4d They are respectively an astigmatism curve, a distortion curve, a diffraction through-focus MTF curve in the visible light band, and a diffraction through-focus MTF curve in the infrared light band of Embodiment 2 of the optical camera lens of the present invention;

[0033] Figure 5 Schematic diagram of the lens group structure of Embodiment 3 of the optical camera lens of the present invention;

[0034] Figures 6a to 6d They are respectively an astigmatism curve, a distortion curve, a diffraction through-focus MTF curve in the visible light band, and a diffraction through-focus MTF curve in the infrared light band of Example 3 of the optical camera lens of the present invention;

[0035] Figure 7 Schematic diagram of the structure of a lens group of an optical camera lens embodiment 4 of the present invention;

[0036] Figures 8a to 8d They are respectively an astigmatism curve, a distortion curve, a diffraction through-focus MTF curve in the visible light band, and a diffraction through-focus MTF curve in the infrared light band of Example 4 of the optical camera lens of the present invention;

[0037] Fig. 9 Schematic diagram of the lens group structure of Embodiment 5 of the optical camera lens of the present invention;

[0038] Figures 10a to 10d They are respectively an astigmatism curve, a distortion curve, a diffraction through-focus MTF curve in the visible light band, and a diffraction through-focus MTF curve in the infrared light band of Example 5 of the optical camera lens of the present invention;

[0039] Fig.11Schematic diagram of the structure of a lens group of an optical camera lens embodiment 6 of the present invention;

[0040] Figures 12a to 12d They are respectively the astigmatism curve, the distortion curve, the diffraction through-focus MTF curve in the visible light band, and the diffraction through-focus MTF curve in the infrared light band of the optical camera lens embodiment 6 of the present invention. DETAILED DESCRIPTION

[0041] 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 only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0042] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present invention, the first lens discussed below may also be referred to as the second lens or the third lens.

[0043] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0044] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0045] In the description of the present invention, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region. If the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens.

[0046] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in a common dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal manner unless expressly so defined herein.

[0047] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The features, principles and other aspects of the present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0048] Exemplary Embodiment

[0049] The optical imaging lens of the exemplary embodiment of the present invention includes three lenses, which are sequentially arranged from the object side to the image side along the optical axis: a first lens, a second lens, and a third lens. Among them, each lens is independent of each other, and there is an air gap between the lenses on the optical axis.

[0050] In this exemplary embodiment, the aperture stop; the first lens has a positive focal power, its object side surface is convex, and its image side surface is convex; the second lens may have a positive or negative focal power; the third lens may have a positive or negative focal power. Both the object side and the image side of the first lens are convex, which is beneficial to lens processing.

[0051] In this exemplary embodiment, the conditional formula satisfied by half of the maximum field of view angle Semi-FOV of the optical imaging lens and the effective focal length f of the optical imaging lens is: tan(Semi-FOV)×f < 1 mm. It can ensure that the field of view angle of the lens is large enough. More specifically, Semi-FOV and f satisfy: 0.5 mm < tan(Semi-FOV)×f < 0.95 mm. For example, 0.80 mm ≤ tan(Semi-FOV)×f ≤ 0.91 mm.

[0052] In this exemplary embodiment, the conditional formula satisfied by the distance TTL from the object side surface of the first lens of the optical imaging lens to the imaging surface on the optical axis, half of the diagonal length ImgH of the effective pixel area on the imaging surface, and the effective focal length f of the optical imaging lens is: 1 < TTL / ImgH×f < 2.06. It is beneficial to achieve a small volume of the lens and facilitate integration. More specifically, TTL, ImgH and f satisfy: 1.6 < TTL / ImgH×f < 2. For example, 1.68 ≤ TTL / ImgH×f ≤ 1.97.

[0053] In this exemplary embodiment, the conditional expression satisfied by the F-number Fno of the optical camera lens is: 1.65 < Fno < 2.2. This can ensure high imaging quality of the lens. More specifically, Fno satisfies: 2 < Fno < 2.1. For example, 2.04 ≤ Fno ≤ 2.08.

[0054] In this exemplary embodiment, the conditional expression satisfied by the sum ∑AT of the air gaps on the optical axis between any two adjacent lenses with optical power among the first lens to the third lens is: ∑AT × 10 ≤ 2.53 mm. This is beneficial for ensuring a compact lens structure, small size, and stable structure. More specifically, ∑AT satisfies: 1 mm < ∑AT × 10 ≤ 2.53 mm. For example, 1.08 mm ≤ ∑AT × 10 ≤ 2.53 mm.

[0055] In this exemplary embodiment, the conditional expression satisfied by the effective focal length f of the optical camera lens and the entrance pupil diameter EPD of the optical camera lens is: 1.6 < f / EPD < 2.2. This ensures a large aperture for the imaging system and enables high-quality imaging. More specifically, f and EPD satisfy: 2 < f / EPD < 2.1. For example, 2.04 ≤ f / EPD ≤ 2.08.

[0056] In this exemplary embodiment, the conditional expression satisfied by half of the diagonal length ImgH of the effective pixel region on the imaging surface is: ImgH < 1 mm. This is beneficial for miniaturization and thinning of the lens, and has a sufficiently large field of view, enabling integration and application in more scenarios. More specifically, ImgH satisfies: 0.8 mm < ImgH < 0.95 mm. For example, 0.82 mm ≤ ImgH ≤ 0.90 mm.

[0057] In this exemplary embodiment, the conditional expression satisfied by the distance TTL from the object side surface of the first lens of the optical camera lens to the imaging surface on the optical axis and half of the maximum field of view Semi-FOV of the optical camera lens is: 1 mm < TTL / tan(Semi-FOV) ≤ 2.03 mm. This is beneficial for miniaturization and thinning of the lens, and has a sufficiently large field of view, enabling integration and application in more scenarios. More specifically, TTL and Semi-FOV satisfy: 1.6 mm < TTL / tan(Semi-FOV) ≤ 2.03 mm. For example, 1.70 mm ≤ TTL / tan(Semi-FOV) ≤ 2.03 mm.

[0058] In this exemplary embodiment, the conditional expressions satisfied by the central thickness CT1 of the first lens on the optical axis, the air gap T12 between the first lens and the second lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, and the axial distance SL from the aperture stop to the imaging surface are: 0 < (CT1 + T12 + CT2) / SL ≤ 0.54. Satisfying the conditional expression ensures a compact lens structure and is conducive to correcting the axial chromatic aberration of the optical system to obtain better imaging performance. More specifically, CT1, T12, CT2, and SL satisfy: 0.3 < (CT1 + T12 + CT2) / SL < 0.5. For example, 0.39 ≤ (CT1 + T12 + CT2) / SL ≤ 0.46.

[0059] In this exemplary embodiment, the conditional expressions satisfied by the axial distance SAG32 between the intersection point of the image side surface of the third lens and the optical axis and the vertex of the effective radius of the image side surface of the third lens, the axial distance SAG31 between the intersection point of the object side surface of the third lens and the optical axis and the vertex of the effective radius of the object side surface of the third lens, and the sum ∑AT of the air gaps on the optical axis between any two adjacent lenses with optical power among the first lens to the third lens are: 0 < ∣SAG32 - SAG31∣ / ∑AT < 1.5. Satisfying the conditional expression is conducive to restricting the sag height difference between the object side surface and the image side surface of the third lens, facilitating the molding process of the third lens, and ensuring an appropriate air gap and a compact and efficient lens structure. More specifically, SAG32, SAG31, and ∑AT satisfy: 0.02 < ∣SAG32 - SAG31∣ / ∑AT < 1.2. For example, 0.03 ≤ ∣SAG32 - SAG31∣ / ∑AT ≤ 1.14.

[0060] In this exemplary embodiment, the working wavelength band of the optical imaging lens is between 470 nm and 850 nm. Satisfying the conditional expression is the basis for ensuring that the lens can achieve imaging functions in both the visible light and infrared wavelength bands.

[0061] In this exemplary embodiment, the conditional expression satisfied by the axial distance SAG22 between the intersection point of the image side surface of the second lens and the optical axis and the vertex of the effective radius of the image side surface of the second lens and the maximum effective radius DT22 of the image side surface of the second lens is:

[0062] -0.5 < SAG22 / DT22 < 0. Reasonably controlling the sag height of the image side surface of the second lens and the maximum effective radius of the image side surface within a reasonable range is conducive to restricting the bending shape and aperture of the second lens and reducing the manufacturing and molding difficulty. More specifically, SAG22 and DT22 satisfy:

[0063] -0.3 < SAG22 / DT22 < -0.1. For example, -0.29 ≤ SAG22 / DT22 ≤ -0.11.

[0064] In the present exemplary embodiment, the conditional formula satisfied by the effective focal length f1 of the first lens and the effective focal length f of the optical camera lens is: 0.3 < f1 / f < 1.5. Constraining the ratio of the focal length of the first lens to that of the entire photographic lens is conducive to reasonably distributing the optical power of each lens. More specifically, f1 and f satisfy: 0.6 < f1 / f < 1.4. For example, 0.67 ≤ f1 / f ≤ 1.32.

[0065] In the present exemplary embodiment, the conditional formula satisfied by the radius of curvature R1 of the object side of the first lens and the radius of curvature R2 of the image side of the first lens is: 0 < ∣R1 / R2∣ < 3. Constraining the ratio of the radius of curvature of the object side to that of the image side of the first lens to satisfy the conditional formula ensures that the first lens is easy to process and form, and adjusts the contribution of the first lens to the aberration of the photographic lens. More specifically, R1 and R2 satisfy: 0.05 < ∣R1 / R2∣ < 2.95. For example, 0.06 ≤ ∣R1 / R2∣ ≤ 2.92.

[0066] In the present exemplary embodiment, the conditional formula satisfied by the maximum effective radius DT21 of the object side of the second lens and the maximum effective radius DT12 of the image side of the first lens is: 1 ≤ DT21 / DT12 < 1.5. Constraining the maximum effective radius of the image side of the first lens and the maximum effective radius of the object side of the second lens to satisfy the conditional formula is conducive to constraining the height difference of the light rays between the first lens and the second lens within a reasonable range, conducive to achieving high-quality imaging, and improving the stability of the lens. More specifically, DT21 and DT12 satisfy: 1 ≤ DT21 / DT12 < 1.1. For example, 1.00 ≤ DT21 / DT12 ≤ 1.08.

[0067] In the present exemplary embodiment, the conditional formula satisfied by the maximum effective radius DT32 of the image side of the third lens and the maximum effective radius DT11 of the object side of the first lens is: 2 < DT32 / DT11 < 3.1. Constraining the maximum effective radius of the object side of the first lens and the maximum effective radius of the image side of the third lens to satisfy the conditional formula is conducive to constraining the apertures of the first lens and the third lens within a reasonable range, conducive to the processing and forming of the lens and the realization of the miniaturization of the lens. More specifically, DT32 and DT11 satisfy:

[0068] 2.05 < DT32 / DT11 < 3.05. For example, 2.08 ≤ DT32 / DT11 ≤ 3.03.

[0069] In this exemplary embodiment, the conditional formula satisfied by the air gap T23 between the second lens and the third lens on the optical axis and the central thickness CT2 of the second lens on the optical axis is: 0 < T23 / CT2 < 0.5. Reasonably controlling this conditional formula can ensure that the central thickness of the second lens and the air gap thickness distribution on its image side are uniform, which is beneficial to the reliability and stability of the lens. More specifically, T23 and CT2 satisfy: 0.1 < T23 / CT2 < 0.4. For example, 0.16 ≤ T23 / CT2 ≤ 0.31.

[0070] In this exemplary embodiment, the conditional formula satisfied by the central thickness CT2 of the second lens on the optical axis and the central thickness CT3 of the third lens on the optical axis is: 0 < CT2 / CT3 < 1. Reasonably controlling the conditional formula can ensure that the thickness distributions of the second lens and the third lens are uniform, which is conducive to the processing and shaping of the lens and also ensures the reliability of the lens. More specifically, CT2 and CT3 satisfy: 0.3 < CT2 / CT3 < 0.98. For example, 0.39 ≤ CT2 / CT3 ≤ 0.97.

[0071] In this exemplary embodiment, the conditional formula satisfied by the central thickness CT3 of the third lens on the optical axis and the central thickness CT1 of the first lens on the optical axis is: 0 < CT3 / CT1 < 2. Reasonably controlling the conditional formula can ensure that the thickness distributions of the first lens and the third lens are uniform, which is conducive to the processing and shaping of the lens and also ensures the reliability of the lens. More specifically, CT3 and CT1 satisfy: 0.4 < CT3 / CT1 < 1.5. For example, 0.46 ≤ CT3 / CT1 ≤ 1.48.

[0072] In this exemplary embodiment, the conditional formula satisfied by the focal plane position F1 of the optical imaging lens in the visible light band and the focal plane position F2 of the optical imaging lens in the near infrared is: |F1 - F2| < 20um. Satisfying the conditional formula can ensure that the image planes in the visible and near infrared light bands have a small difference, and high imaging quality can also be achieved in a fixed-focus lens. More specifically, F1 and F2 satisfy: 0.5um < |F1 - F2| < 16um. For example, 0.58um ≤ |F1 - F2| ≤ 15.21um.

[0073] In this exemplary embodiment, the filter is a band-pass filter, and its band-pass band is between 430nm and 900nm. Satisfying the conditional formula ensures that the imaging lens has a high transmittance in visible light and infrared light, which is beneficial to high-quality imaging.

[0074] In this exemplary embodiment, the above optical imaging lens may further include a diaphragm. The diaphragm can be set at an appropriate position as needed. For example, the diaphragm can be set between the object side and the first lens. Optionally, the above optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0075] The optical camera lens according to the above embodiment of the present invention may use multiple lenses, such as the above three lenses. By reasonably allocating the focal length, surface shape, center thickness of each lens, and axial spacing between lenses, the optical camera lens has a larger imaging surface, a wide imaging range, and high imaging quality, and ensures the ultra-thinness of the mobile phone.

[0076] In an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the mirror surfaces from the object side surface of the first lens to the image side surface of the third lens is an aspherical mirror surface. The characteristics of an aspherical lens are: the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side surface and the image side surface of each lens in the first lens, the second lens and the third lens is an aspherical mirror surface. Optionally, the object side surface and the image side surface of each lens in the first lens, the second lens and the third lens are all aspherical mirror surfaces.

[0077] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical camera lens can be changed to obtain the various results and advantages described in this specification. For example, although three lenses are used as an example in the embodiments, the optical camera lens is not limited to including three lenses, and the optical camera lens may also include other numbers of lenses if necessary.

[0078] Specific embodiments of the optical camera lens applicable to the above embodiments will be further described below with reference to the accompanying drawings. Specific embodiment 1

[0080] Figure 1 Schematic diagram of the lens group structure of the optical camera lens embodiment 1 of the present invention. The optical camera lens comprises, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a filter E4 and an imaging surface S9.

[0081] The first lens E1 has positive power, its object side surface S1 is convex, and its image side surface S2 is convex. The second lens E2 has negative power, its object side surface S3 is concave, and its image side surface S4 is convex. The third lens E3 has positive power, its object side surface S5 is convex, and its image side surface S6 is concave. The filter E4 has an object side surface S7 and an image side surface S8. The light from the object passes through each surface S1 to S8 in sequence and is finally imaged on the imaging surface S9.

[0082] As shown in Table 1, it is a basic parameter table of the optical camera lens of Example 1, wherein the units of the radius of curvature, thickness and focal length are all millimeters (mm).

[0083] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless STO Spherical endless -0.0047 S1 Aspheric 0.9149 0.4000 0.76 1.55 55.92 1.9186 S2 Aspheric -0.6415 0.0996 -0.0231 S3 Aspheric -0.2446 0.1800 -0.95 1.65 23.32 -1.1132 S4 Aspheric -0.5259 0.0300 0.0295 S5 Aspheric 0.3827 0.1859 1.45 1.65 23.32 -0.8797 S6 Aspheric 0.5234 0.2638 -1.0000 S7 Aspheric endless 0.1450 1.52 64.17 S8 Spherical endless 0.2550 S9 Spherical endless endless

[0084] Table 1

[0085] As shown in Table 2, in Example 1, the total effective focal length of the optical camera lens is f=1.04 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S9 is 1.56 mm, half of the diagonal length of the effective pixel area on the imaging surface S9 is ImgH=0.82 mm, and half of the maximum field of view angle of the optical camera lens is Semi-FOV=37.50°.

[0086]

[0087]

[0088] Table 2

[0089] The optical camera lens in Example 1 satisfies:

[0090] tan(Semi-FOV)×f=0.80mm, where Semi-FOV is half of the maximum field of view of the optical camera lens, and f is the effective focal length of the optical camera lens;

[0091] TTL / ImgH×f=1.97, where TTL is the distance from the object side of the first lens of the optical camera lens to the imaging plane on the optical axis, ImgH is half the diagonal length of the effective pixel area on the imaging plane, and f is the effective focal length of the optical camera lens;

[0092] Fno=2.04, where Fno is the F number of the optical camera lens;

[0093] ∑AT×10=1.30 mm, where ∑AT is the sum of the air intervals on the optical axis between any two adjacent lenses having optical power from the first lens to the third lens;

[0094] f / EPD=2.04, where f is the effective focal length of the optical camera lens, and EPD is the entrance pupil diameter of the optical camera lens;

[0095] ImgH = 0.82 mm, where ImgH is half of the diagonal length of the effective pixel area on the imaging surface;

[0096] TTL / tan(Semi-FOV)=2.03mm, where TTL is the distance from the object side of the first lens of the optical camera lens to the imaging plane on the optical axis, and Semi-FOV is half of the maximum field of view of the optical camera lens;

[0097] (CT1+T12+CT2) / SL=0.44, where CT1 is the center thickness of the first lens on the optical axis, T12 is the air gap between the first lens and the second lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, and SL is the on-axis distance from the aperture to the imaging surface;

[0098] |SAG32-SAG31| / ∑AT=0.03, wherein SAG32 is the on-axis distance between the intersection of the image side surface of the third lens and the optical axis and the vertex of the effective radius of the image side surface of the third lens, SAG31 is the on-axis distance between the intersection of the object side surface of the third lens and the optical axis and the vertex of the effective radius of the object side surface of the third lens, and ∑AT is the sum of the air intervals on the optical axis between any two adjacent lenses having optical power from the first lens to the third lens;

[0099] SAG22 / DT22=-0.29, where SAG22 is the on-axis distance between the intersection of the image side surface of the second lens and the optical axis to the vertex of the effective radius of the image side surface of the second lens, and DT22 is the maximum effective radius of the image side surface of the second lens;

[0100] f1 / f=0.73, where f1 is the effective focal length of the first lens and f is the effective focal length of the optical camera lens;

[0101] |R1 / R2|=1.43, where R1 is the radius of curvature of the object side of the first lens, and R2 is the radius of curvature of the image side of the first lens;

[0102] DT21 / DT12=1.00, where DT21 is the maximum effective radius of the object side of the second lens, and DT12 is the maximum effective radius of the image side of the first lens;

[0103] DT32 / DT11=2.08, where DT32 is the maximum effective radius of the image side of the third lens, and DT11 is the maximum effective radius of the object side of the first lens;

[0104] T23 / CT2=0.17, where T23 is the air spacing between the second lens and the third lens on the optical axis, and CT2 is the center thickness of the second lens on the optical axis;

[0105] CT2 / CT3=0.97, where CT2 is the center thickness of the second lens on the optical axis, and CT3 is the center thickness of the third lens on the optical axis;

[0106] CT3 / CT1=0.46, where CT3 is the center thickness of the third lens on the optical axis, and CT1 is the center thickness of the first lens on the optical axis;

[0107] |F1-F2|=11.41um, where F1 is the focal plane position of the optical camera lens in the visible light band, and F2 is the focal plane position of the optical camera lens in the near-infrared band.

[0108] In Embodiment 1, the object side surface and the image side surface of any lens among the first lens E1 to the third lens E3 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0109]

[0110] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1); k is the cone coefficient; Ai is the correction coefficient of the i-th order aspheric surface.

[0111] In Example 1, the object side surface and the image side surface of any one of the first lens E1 to the third lens E3 are aspherical surfaces. Table 3 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A5 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0112]

[0113]

[0114] Table 3

[0115] Figure 2a The astigmatism curve of the optical imaging lens of Example 1 is shown, which indicates the meridional field curvature and the sagittal field curvature. Figure 2b The distortion curve of the optical imaging lens of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 2c The diffraction through-focus MTF curve in the visible light band of Example 1 is shown, which indicates the diffraction through-focus MTF value in the visible light band. Figure 2dThe diffraction through-focus MTF curve of the infrared light band of Example 1 is shown, which represents the diffraction through-focus MTF value of the infrared light band. Figure 2a to Figure 2d It can be seen from the figure that the optical camera lens provided in Example 1 can achieve good imaging quality. Specific embodiment 2

[0117] Figure 3 Schematic diagram of the lens group structure of embodiment 2 of the optical camera lens of the present invention. The optical camera lens comprises, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a filter E4 and an imaging surface S9.

[0118] The first lens E1 has positive power, its object side surface S1 is convex, and its image side surface S2 is convex. The second lens E2 has negative power, its object side surface S3 is concave, and its image side surface S4 is convex. The third lens E3 has positive power, its object side surface S5 is convex, and its image side surface S6 is convex. The filter E4 has an object side surface S7 and an image side surface S8. The light from the object passes through each surface S1 to S8 in sequence and is finally imaged on the imaging surface S9.

[0119] As shown in Table 4, it is a basic parameter table of the optical camera lens of Example 2, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0120] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless STO Spherical endless 0.0395 S1 Aspheric 1.6403 0.3003 0.82 1.54 55.71 0.1412 S2 Aspheric -0.5617 0.2233 0.0160 S3 Aspheric -0.2088 0.1750 -0.63 1.67 20.37 -1.0022 S4 Aspheric -0.5550 0.0300 0.0014 S5 Aspheric 0.4024 0.4227 0.75 1.54 55.71 -1.0016 S6 Aspheric -100.0000 0.1072 -95.3148 S7 Aspheric endless 0.1450 1.52 64.17 S8 Spherical endless 0.2570 S9 Spherical endless endless

[0121] Table 4

[0122] As shown in Table 5, in Example 2, the total effective focal length of the optical camera lens is f=0.98 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S9 on the optical axis is 1.66 mm, half of the diagonal length of the effective pixel area on the imaging surface S9 is ImgH=0.87 mm, and half of the maximum field angle of the optical camera lens is Semi-FOV=41.12°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0123]

[0124] Table 5

[0125] In Example 2, the object side surface and the image side surface of any one of the first lens E1 to the third lens E3 are aspherical surfaces. Table 6 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A5 10 , A 12 , A 14 , A 16 , A 18 , A 20, A 22 , A 24 , A 26 , A 28 and A 30 .

[0126] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.5886E-02 -1.5823E-03 -2.0302E-04 -3.6633E-05 4.7027E-07 -2.5397E-07 -1.4679E-06 S2 -2.8231E-02 -1.0573E-03 -1.4945E-04 -1.9748E-04 2.4508E-05 -2.1925E-05 7.6808E-06 S3 9.6021E-02 4.8134E-03 -6.6544E-04 -8.0840E-04 5.2127E-04 -1.7303E-04 8.5819E-06 S4 3.4288E-02 1.9392E-02 -1.8249E-04 -1.5079E-03 6.3312E-04 -1.5099E-04 3.0751E-05 S5 -4.1121E-01 6.4652E-02 -1.9731E-02 2.8314E-03 -1.1231E-03 -9.2323E-04 2.8013E-04 S6 7.9797E-03 -5.6600E-02 1.2057E-02 -1.3341E-02 3.7991E-03 -3.1406E-03 9.5812E-04 Face number A18 A20 A22 A24 A26 A28 A30 S1 -4.0193E-06 -2.5486E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 -8.8516E-06 1.8290E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 2.0592E-05 -2.0484E-05 1.6803E-05 -8.6633E-06 9.8173E-06 -5.1425E-06 7.3432E-07 S4 1.3085E-05 -2.8877E-05 2.3848E-05 -1.6997E-05 7.5487E-06 -5.0938E-06 -2.8985E-07 S5 -4.2498E-04 3.6066E-04 -6.2361E-05 1.8643E-04 -3.1990E-05 3.0973E-05 -3.1929E-05 S6 -4.8751E-04 2.7725E-04 -7.1597E-05 3.3348E-05 1.8259E-05 2.4477E-05 -5.4208E-06

[0127] Table 6

[0128] Figure 4a The astigmatism curve of the optical imaging lens of Example 2 is shown, which indicates the meridional field curvature and the sagittal field curvature. Figure 4b The distortion curve of the optical imaging lens of Example 2 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 4c The diffraction through-focus MTF curve in the visible light band of Example 2 is shown, which indicates the diffraction through-focus MTF value in the visible light band. Figure 4d The diffraction through-focus MTF curve of the infrared light band is shown, which represents the diffraction through-focus MTF value of the infrared light band. Figures 4a to 4d It can be seen from the figure that the optical camera lens provided in Example 2 can achieve good imaging quality. Specific embodiment 3

[0130] Figure 5 Schematic diagram of the lens group structure of the optical camera lens embodiment 3 of the present invention. The optical camera lens comprises, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a filter E4 and an imaging surface S9.

[0131] The first lens E1 has positive power, and its object side surface S1 is convex, and its image side surface S2 is convex. The second lens E2 has negative power, and its object side surface S3 is concave, and its image side surface S4 is convex. The third lens E3 has negative power, and its object side surface S5 is concave, and its image side surface S6 is concave. The filter E4 has an object side surface S7 and an image side surface S8. The light from the object passes through each surface S1 to S8 in sequence and is finally imaged on the imaging surface S9.

[0132] As shown in Table 7, it is a basic parameter table of the optical camera lens of Example 3, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0133] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless STO Spherical endless 0.0346 S1 Aspheric 0.7939 0.3118 0.74 1.54 55.71 0.6884 S2 Aspheric -0.6851 0.1596 1.3709 S3 Aspheric -0.2466 0.1843 -24.68 1.67 20.37 -1.1991 S4 Aspheric -0.3252 0.0300 -0.3518 S5 Aspheric -66.6667 0.4500 -4.39 1.54 55.71 -99.0000 S6 Aspheric 2.4478 0.0603 10.7978 S7 Aspheric endless 0.1450 1.52 64.17 S8 Spherical endless 0.2220 S9 Spherical endless endless

[0134] Table 7

[0135] As shown in Table 8, in Example 3, the total effective focal length of the optical camera lens is f=1.07 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S9 on the optical axis is 1.56 mm, half of the diagonal length of the effective pixel area on the imaging surface S9 is ImgH=0.90 mm, and half of the maximum field angle of the optical camera lens is Semi-FOV=39.05°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0136]

[0137] Table 8

[0138] In Example 3, the object side surface and the image side surface of any one of the first lens E1 to the third lens E3 are aspherical surfaces. Table 9 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A5 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0139] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.0181E-02 -3.2988E-03 -6.6478E-04 -1.6982E-04 -3.8729E-05 -1.3335E-05 -4.2529E-06 S2 -3.3106E-02 -1.1491E-03 -3.2021E-04 -1.8969E-04 4.9759E-06 -1.7264E-05 8.1054E-06 S3 4.4246E-02 7.8665E-03 -1.4755E-03 6.9498E-05 1.4119E-04 -3.8603E-05 -5.4786E-06 S4 1.8520E-01 1.4603E-02 4.2937E-03 -5.4398E-04 8.7947E-04 -5.1200E-05 7.5933E-05 S5 -1.1175E-02 -2.0855E-02 4.6689E-03 -3.1624E-03 1.4828E-03 -5.6291E-04 4.0433E-04 S6 -2.3161E-01 -3.1086E-02 4.4666E-04 -4.1568E-03 1.5482E-03 -9.6651E-04 4.8752E-04 Face number A18 A20 A22 A24 A26 A28 A30 S1 -3.3626E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 -4.1361E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 1.6538E-05 -9.0733E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -2.6158E-06 1.0391E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 -1.2076E-04 1.1387E-04 -3.7911E-05 3.5525E-05 -1.7567E-05 1.1980E-05 -8.8553E-06 S6 -2.8536E-04 1.8015E-04 -9.7914E-05 1.0985E-04 -3.1633E-05 5.0224E-05 -4.0553E-05

[0140] Table 9

[0141] Figure 6a The astigmatism curve of the optical imaging lens of Example 3 is shown, which indicates the meridional field curvature and the sagittal field curvature. Figure 6b The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 6c The diffraction through-focus MTF curve in the visible light band of Example 3 is shown, which represents the diffraction through-focus MTF value in the visible light band. Figure 6d The diffraction through-focus MTF curve of the infrared light band of Example 3 is shown, which represents the diffraction through-focus MTF value of the infrared light band. Figures 6a to 6d It can be seen from the figure that the optical camera lens provided in Example 3 can achieve good imaging quality. Specific embodiment 4

[0143] Figure 7 Schematic diagram of the lens group structure of the optical camera lens embodiment 4 of the present invention. The optical camera lens comprises, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a filter E4 and an imaging surface S9.

[0144] The first lens E1 has positive power, its object side surface S1 is convex, and its image side surface S2 is convex. The second lens E2 has positive power, its object side surface S3 is concave, and its image side surface S4 is convex. The third lens E3 has negative power, its object side surface S5 is concave, and its image side surface S6 is convex. The filter E4 has an object side surface S7 and an image side surface S8. The light from the object passes through each surface of the surface S1 to S8 in sequence and is finally imaged on the imaging surface S9.

[0145] As shown in Table 10, it is a basic parameter table of the optical camera lens of Example 4, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0146] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless STO Spherical endless 0.0428 S1 Aspheric 0.7581 0.3044 0.75 1.54 55.71 1.1164 S2 Aspheric -0.7443 0.1510 4.0046 S3 Aspheric -0.2442 0.1861 102.68 1.67 20.37 -1.1156 S4 Aspheric -0.3175 0.0300 -0.3494 S5 Aspheric -4.0690 0.4500 -7.99 1.54 55.71 13.0205 S6 Aspheric -83.3333 0.0848 10.7978 S7 Aspheric endless 0.1450 1.52 64.17 S8 Spherical endless 0.2464 S9 Spherical endless endless

[0147] Table 10

[0148] As shown in Table 11, in Example 4, the total effective focal length f of the optical camera lens is 1.07 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S9 on the optical axis is 1.60 mm, half of the diagonal length of the effective pixel area on the imaging surface S9 is ImgH=0.90 mm, and half of the maximum field angle of the optical camera lens is Semi-FOV=38.96°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0149]

[0150] Table 11

[0151] In Example 4, the object side surface and the image side surface of any one of the first lens E1 to the third lens E3 are aspherical surfaces. Table 12 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A 10 , A 12 , A 14 , A 16 , A 10 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0152]

[0153]

[0154] Table 12

[0155] Figure 8aThe astigmatism curve of the optical imaging lens of Example 4 is shown, which indicates the meridional field curvature and the sagittal field curvature. Figure 8b The distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 8c The diffraction through-focus MTF curve in the visible light band of Example 4 is shown, which represents the diffraction through-focus MTF value in the visible light band. Figure 8d The diffraction through-focus MTF curve of the infrared light band of Example 4 is shown, which represents the diffraction through-focus MTF value of the infrared light band. Figures 8a to 8d It can be seen from the figure that the optical camera lens provided in Example 4 can achieve good imaging quality. Specific embodiment 5

[0157] Fig. 9 Schematic diagram of the lens group structure of the optical camera lens embodiment 5 of the present invention. The optical camera lens comprises, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a filter E4 and an imaging surface S9.

[0158] The first lens E1 has positive power, its object side surface S1 is convex, and its image side surface S2 is convex. The second lens E2 has negative power, its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has positive power, its object side surface S5 is convex, and its image side surface S6 is concave. The filter E4 has an object side surface S7 and an image side surface S8. The light from the object passes through each surface of the surface S1 to S8 in sequence and is finally imaged on the imaging surface S9.

[0159] As shown in Table 13, it is a basic parameter table of the optical camera lens of Example 5, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0160] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless STO Spherical endless 0.1695 S1 Aspheric 0.7605 0.4309 0.67 1.54 55.71 0.8702 S2 Aspheric -0.5510 0.0746 -0.6523 S3 Aspheric -0.3637 0.1750 -0.54 1.67 20.37 -0.9292 S4 Aspheric 28.5714 0.0336 -99.0000 S5 Aspheric 0.3716 0.4458 0.91 1.54 55.71 -0.9424 S6 Aspheric 0.5537 0.1656 -0.5374 S7 Aspheric endless 0.1450 1.52 64.17 S8 Spherical endless 0.0400 S9 Spherical endless endless

[0161] Table 13

[0162] As shown in Table 14, in Example 5, the total effective focal length f of the optical camera lens is 1.00 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S9 on the optical axis is 1.51 mm, half of the diagonal length of the effective pixel area on the imaging surface S9 is ImgH=0.90 mm, and half of the maximum field angle of the optical camera lens is Semi-FOV=41.57°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0163]

[0164] Table 14

[0165] In Example 5, the object side surface and the image side surface of any one of the first lens E1 to the third lens E3 are aspherical surfaces. Table 15 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A62, A71, A72, A73, A74, A75 10 , A 12 , A 14 , A 16 , A 10 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0166] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.9273E-02 -3.1791E-03 -6.9293E-04 -1.9364E-04 -6.1521E-05 -2.4488E-05 -8.5693E-06 S2 -2.3202E-02 -4.0354E-03 -1.0244E-04 -3.5481E-04 1.2941E-04 -8.6838E-05 3.5672E-05 S3 6.7315E-02 -9.6760E-04 1.0111E-03 -5.6949E-04 3.4131E-04 -1.7601E-04 7.5840E-05 S4 -7.4797E-02 3.2612E-02 -5.4316E-03 1.6233E-03 -2.6024E-04 5.6084E-05 -3.2904E-05 S5 -2.8651E-01 3.5941E-02 -9.0144E-03 2.4868E-03 -6.5174E-04 1.9222E-04 -1.3279E-04 S6 -6.8502E-01 2.1784E-02 -2.4811E-02 -2.2391E-03 -1.0810E-03 -1.4743E-03 2.8905E-04 Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.5102E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 -1.2696E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -2.3886E-05 2.0172E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 1.2914E-05 -4.4186E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 3.6801E-05 -2.8037E-05 1.3120E-05 -2.4048E-06 3.4571E-06 0.0000E+00 0.0000E+00 S6 -5.9335E-04 2.0306E-04 -1.4053E-04 9.9831E-05 -3.4678E-05 0.0000E+00 0.0000E+00

[0167] Table 15

[0168] Fig.10a The astigmatism curve of the optical imaging lens of Example 5 is shown, which indicates the meridional field curvature and the sagittal field curvature. Fig.10b The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.10c The diffraction through-focus MTF curve of Example 5 in the visible light band is shown, which represents the diffraction through-focus MTF value in the visible light band. Fig.10d The diffraction through-focus MTF curve of the infrared light band of Example 5 is shown, which represents the diffraction through-focus MTF value of the infrared light band. Figures 10a to 10d It can be seen from the figure that the optical camera lens provided in Example 5 can achieve good imaging quality. Specific embodiment 6

[0170] Fig.11 Schematic diagram of the lens group structure of embodiment 6 of the optical camera lens of the present invention. The optical camera lens comprises, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a filter E4 and an imaging surface S9.

[0171] The first lens E1 has positive power, its object side surface S1 is convex, and its image side surface S2 is convex. The second lens E2 has negative power, its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, its object side surface S5 is convex, and its image side surface S6 is concave. The filter E4 has an object side surface S7 and an image side surface S8. The light from the object passes through each surface S1 to S8 in sequence and is finally imaged on the imaging surface S9.

[0172] As shown in Table 16, it is a basic parameter table of the optical camera lens of Example 6, wherein the units of the curvature radius, thickness and focal length are all millimeters (mm).

[0173] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless STO Spherical endless 0.0969 S1 Aspheric 0.7978 0.4462 1.42 1.54 55.71 2.0547 S2 Aspheric -12.7937 0.1166 99.0000 S3 Aspheric 62.5000 0.1984 -130.27 1.54 55.71 -28.4057 S4 Aspheric 32.9589 0.0606 -99.0000 S5 Aspheric 0.5952 0.3449 21.29 1.67 20.37 -0.7396 S6 Aspheric 0.4773 0.1750 -0.6292 S7 Aspheric endless 0.1450 1.52 64.17 S8 Spherical endless 0.0645 S9 Spherical endless endless

[0174] Table 16

[0175] As shown in Table 17, in Example 6, the total effective focal length f of the optical camera lens is 1.07 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S9 on the optical axis is 1.55 mm, half of the diagonal length of the effective pixel area on the imaging surface S9 is ImgH=0.90 mm, and half of the maximum field angle of the optical camera lens is Semi-FOV=40.20°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0176]

[0177]

[0178] In Example 6, the object side surface and the image side surface of any one of the first lens E1 to the third lens E3 are aspherical surfaces. Table 18 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0179] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.3896E-02 -1.3474E-03 -1.3217E-04 -1.8536E-05 8.2871E-07 -3.9022E-06 -1.4526E-06 S2 -2.3479E-02 -5.0510E-03 4.2975E-04 -2.7026E-05 5.6514E-05 -3.4512E-05 1.4905E-05 S3 1.2738E-02 -1.0445E-02 8.1910E-04 2.9027E-04 3.5635E-04 -1.5409E-05 1.3679E-06 S4 -6.4217E-02 7.9393E-03 -1.7488E-03 1.4019E-03 7.0879E-04 1.2907E-04 3.0111E-05 S5 -2.3317E-01 6.4972E-03 -2.5444E-03 8.7752E-04 6.5338E-04 2.5255E-04 -6.0346E-05 S6 -7.7430E-01 3.6710E-02 -2.5563E-02 1.2721E-03 -1.2961E-03 -8.4922E-04 4.4696E-05 Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.9697E-06 -1.2408E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 -7.7447E-06 3.4198E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -1.4863E-05 -4.5093E-06 1.4567E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 1.2181E-05 -7.9869E-06 2.1444E-06 1.8471E-06 3.3255E-06 0.0000E+00 0.0000E+00 S5 -1.1588E-05 -5.4414E-05 -2.9059E-06 -1.0938E-05 8.5721E-06 0.0000E+00 0.0000E+00 S6 -3.5841E-04 7.0163E-05 -8.4215E-05 2.1280E-05 -1.5508E-05 1.7755E-05 1.1112E-07

[0180] Table 18

[0181] Fig.12a The astigmatism curve of the optical imaging lens of Example 6 is shown, which indicates the meridional field curvature and the sagittal field curvature. Figure 12b The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.12c The diffraction through-focus MTF curve in the visible light band of Example 6 is shown, which represents the diffraction through-focus MTF value in the visible light band. Fig.12d The diffraction through-focus MTF curve of the infrared light band of Example 6 is shown, which represents the diffraction through-focus MTF value of the infrared light band. Figures 12a to 12d It can be seen from the figure that the optical camera lens provided in Example 6 can achieve good imaging quality.

[0182] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, improvements, equivalent substitutions, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical camera lens, characterized in that: The optical camera lens has three lenses with optical power, and the optical camera lens includes, in order from the object side to the image side along the optical axis: Aperture; A first lens having positive refractive power, whose object-side surface is convex and whose image-side surface is convex; The second lens has a concave object side surface; The third lens; Optical filters; The second lens has negative optical power and the third lens has negative optical power; or the second lens has positive optical power and the third lens has negative optical power; or the second lens has negative optical power and the third lens has positive optical power; Among them, half of the maximum field of view angle Semi-FOV of the optical camera lens and the effective focal length f of the optical camera lens satisfy: tan(Semi-FOV)×f<1mm; the distance TTL from the object side of the first lens of the optical camera lens to the imaging plane on the optical axis, half of the diagonal length of the effective pixel area on the imaging plane ImgH and the effective focal length f of the optical camera lens satisfy: 1.68≤TTL / ImgH×f≤1.97; the F number Fno of the optical camera lens satisfies: 2.04≤Fno≤2.08; The maximum effective radius DT32 of the image side surface of the third lens and the maximum effective radius DT11 of the object side surface of the first lens satisfy: 2.08≤DT32 / DT11≤3.

03.

2. The optical camera lens according to claim 1, wherein: The center thickness CT1 of the first lens on the optical axis, the air interval T12 between the first lens and the second lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, and the axial distance SL from the aperture to the imaging plane satisfy: 0.39≤(CT1+T12+CT2) / SL≤0.

46.

3. The optical camera lens according to claim 1, wherein: The on-axis distance SAG32 between the intersection of the image side surface of the third lens and the optical axis to the vertex of the effective radius of the image side surface of the third lens, the on-axis distance SAG31 between the intersection of the object side surface of the third lens and the optical axis to the vertex of the effective radius of the object side surface of the third lens, and the sum ∑AT of the air gap on the optical axis between any two adjacent lenses with optical focal power from the first lens to the third lens satisfy: 0<|SAG32-SAG31| / ∑AT≤1.

14.

4. The optical camera lens according to claim 1, wherein: The working wavelength band of the optical camera lens is between 470nm and 850nm.

5. The optical camera lens according to claim 1, wherein: An axial distance SAG22 from the intersection of the second lens image side surface and the optical axis to the effective radius vertex of the second lens image side surface and a maximum effective radius DT22 of the second lens image side surface satisfy: -0.29≤SAG22 / DT22≤-0.

11.

6. The optical camera lens according to claim 1, wherein: The effective focal length f1 of the first lens and the effective focal length f of the optical camera lens satisfy the following: 0.67≤f1 / f≤1.

32.

7. The optical camera lens according to claim 1, wherein: A curvature radius R1 of the object side surface of the first lens and a curvature radius R2 of the image side surface of the first lens satisfy: 0.06≤|R1 / R2|≤2.

92.

8. The optical camera lens according to claim 1, wherein: The maximum effective radius DT21 of the object side of the second lens and the maximum effective radius DT12 of the image side of the first lens satisfy: 1≤DT21 / DT12≤1.

08.

9. The optical camera lens according to claim 1, wherein: An air interval T23 between the second lens and the third lens on the optical axis and a center thickness CT2 of the second lens on the optical axis satisfy: 0.16≤T23 / CT2≤0.

31.

10. The optical camera lens according to claim 1, wherein: A center thickness CT2 of the second lens on the optical axis and a center thickness CT3 of the third lens on the optical axis satisfy: 0.39≤CT2 / CT3<1.

11. The optical camera lens according to claim 1, wherein: A center thickness CT3 of the third lens on the optical axis and a center thickness CT1 of the first lens on the optical axis satisfy: 0.46≤CT3 / CT1≤1.

48.

12. The optical camera lens according to claim 1, wherein: The focal plane position F1 of the optical camera lens in the visible light band and the focal plane position F2 of the optical camera lens in the near infrared band satisfy: 0.58um≤|F1-F2|≤15.21um.

13. The optical camera lens according to claim 1, wherein: The optical filter is a bandpass filter, and its bandpass wavelength is between 430nm and 900nm.

Images