Optical camera

Abstract

This invention relates to an optical camera, comprising a lens barrel and an imaging lens group and a plurality of spacer elements housed within the lens barrel; the imaging lens group, along the optical axis from the object side to the image side, sequentially comprises: a first lens with negative optical power, a second lens with positive optical power, a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens with positive optical power, and a sixth lens with negative optical power; the plurality of spacer elements includes a third spacer element and a fourth spacer element; the optical camera satisfies: 15.20≤T45 / T56≤24.59; 1.05≤T45 / EP34≤2.01; 1.11≤R8 / d4s≤1.42; -1.09≤R9 / d5s≤-0.63. The optical camera of this invention ensures high resolution and low distortion while reducing the influence of stray light, and also achieves miniaturized design of the lens module.

Description

Technical Field

[0001] This invention relates to the field of imaging lens technology, and more particularly to an optical camera. Background Technology

[0002] With the rapid development of mobile smart terminal devices, the performance requirements for their built-in optical cameras are increasing. The market not only demands excellent imaging quality such as high resolution, low distortion, and high contrast, but also places extremely stringent demands on miniaturization and thinness. Currently, optical systems employing a six-element lens structure have become the mainstream technology solution for high-end mobile phone cameras.

[0003] To achieve high-performance imaging within a limited volume, existing technologies typically employ numerous aspherical lenses and complex lens shapes to correct aberrations, such as by adjusting lens curvature, thickness, and material combinations to optimize aberration correction. However, this design approach also introduces new technical challenges: First, the air gaps between lenses and the layout of the spacers significantly impact aberration control, stray light suppression, and system compactness. Improper design can easily lead to decreased edge field illumination, increased distortion, or enhanced stray light energy. Second, if the inner diameter, outer diameter, and relative position of the spacers are not properly constrained, assembly step differences can be introduced, affecting system stability and imaging consistency.

[0004] Furthermore, existing solutions often struggle to achieve high resolution, low stray light, and high assembly stability simultaneously when balancing optical performance and small-size design, especially in low-distortion optical lens applications where the problem is even more pronounced. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention aims to provide an optical camera that, by optimizing the lens spacing, spacer parameters, and curvature relationship, effectively improves imaging resolution and reduces distortion and stray light while achieving miniaturization.

[0006] To achieve the above-mentioned objectives, the present invention provides an optical camera, including a lens barrel and an imaging lens group and a plurality of spacer elements housed within the lens barrel.

[0007] The imaging lens group includes, in sequence along the optical axis from the object side to the image side: a first lens with negative optical power, a second lens with positive optical power, a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens with positive optical power, and a sixth lens with negative optical power.

[0008] The plurality of spacers include: a third spacer located between the third lens and the fourth lens and in at least partial contact with the image-side surface of the third lens; a fourth spacer located between the fourth lens and the fifth lens and in at least partial contact with the image-side surface of the fourth lens; and a fifth spacer located between the fifth lens and the sixth lens and in at least partial contact with the image-side surface of the fifth lens.

[0009] The optical camera satisfies the following conditions: 15.20≤T45 / T56≤24.59; 1.05≤T45 / EP34≤2.01; 1.11≤R8 / d4s≤1.42; -1.09≤R9 / d5s≤-0.63;

[0010] Wherein, T45 is the air gap between the fourth lens and the fifth lens on the optical axis, T56 is the air gap between the fifth lens and the sixth lens on the optical axis, EP34 is the spacing distance between the third spacer element and the fourth spacer element along the optical axis, R8 is the radius of curvature of the image side of the fourth lens, R9 is the radius of curvature of the object side of the fifth lens, d4s is the inner diameter of the object side of the fourth spacer element, and d5s is the inner diameter of the object side of the fifth spacer element.

[0011] According to one technical solution of the present invention, the plurality of spacers further includes: a first spacer element located between the first lens and the second lens, and at least partially in contact with the image-side surface of the first lens; and a second spacer element located between the second lens and the third lens, and at least partially in contact with the image-side surface of the second lens.

[0012] The optical camera satisfies: 4.01≤f12 / (EP01+EP12)≤5.16;

[0013] Wherein, f12 is the combined focal length of the first lens and the second lens, EP01 is the distance between the object-side end face of the lens barrel and the first spacer element along the optical axis, and EP12 is the distance between the first spacer element and the second spacer element along the optical axis.

[0014] According to one technical solution of the present invention, the plurality of spacers further includes: a first spacer, located between the first lens and the second lens, and at least partially in contact with the image side of the first lens;

[0015] The optical camera satisfies: -5.93≤R1 / d1s≤-3.94;

[0016] Wherein, d1s is the inner diameter of the object side surface of the first spacer element, and R1 is the radius of curvature of the object side surface of the first lens.

[0017] According to one technical solution of the present invention, the plurality of spacers further includes: a first spacer, located between the first lens and the second lens, and at least partially in contact with the image side of the first lens;

[0018] The optical camera satisfies: -3.18≤R2 / D1s≤-1.97;

[0019] Wherein, R2 is the radius of curvature of the image side of the first lens, and D1s is the outer diameter of the object side of the first spacer element.

[0020] According to one technical solution of the present invention, the plurality of spacer elements further includes: a second spacer element located between the second lens and the third lens, and at least partially in contact with the image side of the second lens;

[0021] The optical camera satisfies: -2.03≤D2s / R4≤-1.70;

[0022] Wherein, D2s is the outer diameter of the object side of the second spacer element, and R4 is the radius of curvature of the image side of the second lens.

[0023] According to one technical solution of the present invention, the plurality of spacer elements further includes: a second spacer element located between the second lens and the third lens, and at least partially in contact with the image side of the second lens;

[0024] The optical camera satisfies: 3.27≤d2m / Yc31≤4.96;

[0025] Wherein, d2m is the inner diameter of the image side of the second spacer element, and Yc31 is the perpendicular distance between the object side of the third lens and the optical axis at the intersection of the positive and negative changes in surface curvature at the off-axis location.

[0026] According to one technical solution of the present invention, the plurality of spacer elements further includes: a second spacer element located between the second lens and the third lens, and at least partially in contact with the image side of the second lens;

[0027] The optical camera satisfies: -20.41≤f3 / EP23≤-12.6;

[0028] Wherein, f3 is the effective focal length of the third lens, and EP23 is the spacing distance between the second spacer element and the third spacer element along the optical axis.

[0029] According to one technical solution of the present invention, the optical camera satisfies: 1.75≤R6*N3 / d3s≤3.07;

[0030] Wherein, R6 is the radius of curvature of the image side of the third lens, N3 is the refractive index of the third lens, and d3s is the inner diameter of the object side of the third spacer element.

[0031] According to one technical solution of the present invention, the optical camera satisfies: 5.85≤T45 / |SAG42|≤15.44;

[0032] Wherein, T45 is the air gap between the fourth lens and the fifth lens on the optical axis, and SAG42 is the axial displacement between the intersection of the image-side surface of the fourth lens and the optical axis and the vertex of the effective radius of the image-side surface of the fourth lens.

[0033] According to one technical solution of the present invention, the optical camera satisfies: 0.23≤EP45 / (D5s-D4m)≤1.26;

[0034] Wherein, EP45 is the spacing distance between the fourth spacer element and the fifth spacer element along the optical axis, D5s is the outer diameter of the object side of the fifth spacer element, and D4m is the outer diameter of the image side of the fourth spacer element.

[0035] According to one technical solution of the present invention, the optical camera satisfies: 1.03≤CT6*d0m / (D5m-d5m)≤1.69;

[0036] Wherein, CT6 is the center thickness of the sixth lens, d0m is the inner diameter of the image-side end face of the lens barrel, D5m is the outer diameter of the image-side surface of the fifth spacer element, and d5m is the inner diameter of the image-side surface of the fifth spacer element.

[0037] According to one technical solution of the present invention, the optical camera satisfies: 24.25≤f4 / EP34≤37.77;

[0038] Wherein, f4 is the effective focal length of the fourth lens, and EP34 is the spacing distance between the third and fourth spacers along the optical axis.

[0039] According to one technical solution of the present invention, the optical camera satisfies: 3.07≤d3s / Yc32≤3.48;

[0040] Wherein, d3s is the inner diameter of the object side of the third spacer element, and Yc32 is the perpendicular distance between the point where the positive and negative curvature of the image side of the third lens changes at the off-axis and the optical axis.

[0041] The optical camera of this invention includes six lenses with optical power and at least one spacer element. The first to sixth lenses are arranged sequentially with spacing between them. By constraining the ratio of the air gap between the fourth and fifth lenses and between the fifth and sixth lenses, the optical path layout of the system can be effectively controlled, balancing aberrations and compactness requirements. However, this also makes the fifth and sixth lenses more sensitive to position during assembly, posing a risk of introducing stray light. By limiting 1.05 ≤ T45 / EP34 ≤ 2.01, sufficient structural support thickness is ensured between the fourth lens and its adjacent spacer element, thereby reducing assembly sensitivity caused by excessively small lens spacing and improving the overall structural stability. Furthermore, by satisfying 1.11 ≤ R8 / d4s ≤ 1.42 and -1.09 ≤ R9 / d5s ≤ -0.63, adjusting the ratio of the curvature radius of the image side of the fourth lens and the object side of the fifth lens to the inner diameter of their corresponding spacer elements, can adjust the refraction angle of light between the lenses, effectively reduce optical distortion, and improve edge field-of-view illumination while suppressing stray light energy intensity, thereby reducing the risk of vignetting and haloing in the image. By simultaneously satisfying the above relationships, the optical camera achieves high resolution and low distortion imaging while also meeting the requirements for stray light suppression, miniaturization, and stability of the module structure. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0043] Figure 1 A structural layout diagram and schematic diagram of some parameters of an optical camera according to the present invention are shown;

[0044] Figure 2A , Figure 2B A schematic diagram of the structure of two optical cameras according to Embodiment 1 of the present invention is shown;

[0045] Figure 2C , Figure 2D , Figure 2E and Figure 2F The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical camera according to Embodiment 1 of the present invention are shown respectively.

[0046] Figure 3A , Figure 3B The diagram shows two optical cameras according to Embodiment 2 of the present invention;

[0047] Figure 3C , Figure 3D , Figure 3E and Figure 3F The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical camera according to Embodiment 2 of the present invention are shown respectively.

[0048] Figure 4A , Figure 4B The diagram shows two optical cameras according to Embodiment 3 of the present invention;

[0049] Figure 4C , Figure 4D , Figure 4E and Figure 4F The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical camera according to Embodiment 3 of the present invention are shown respectively.

[0050] Figure 5A , Figure 5B The diagram shows two optical cameras according to Embodiment 4 of the present invention;

[0051] Figure 5C , Figure 5D , Figure 5E and Figure 5F The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical camera according to Embodiment 4 of the present invention are shown respectively.

[0052] Figure 6A The defocus curve of the modulation transfer function of the optical camera of the present invention is shown when T45 / T56=19.86;

[0053] Figure 6B The defocus curve of the modulation transfer function of the optical camera in Comparative Example 1 when T45 / T56=14.0 is shown.

[0054] Figure 6C The defocus curve of the modulation transfer function of the optical camera in Comparative Example 2 is shown when T45 / T56=26;

[0055] Figure 7A The defocus curve of the modulation transfer function of the optical camera of the present invention is shown when T45 / EP34=1.63;

[0056] Figure 7B The defocus curve of the modulation transfer function of the optical camera in Comparative Example 3 when T45 / EP34=0.9 is shown.

[0057] Figure 7CThe defocus curve of the modulation transfer function of the optical camera in Comparative Example 4 when T45 / EP34=2.1 is shown.

[0058] Figure 8A The optical path diagram and light spot simulation diagram of the optical camera of the present invention are shown when R8 / d4s=1.25;

[0059] Figure 8B The optical path diagram and simulated spot diagram of the optical camera in Comparative Example 5 are shown when R8 / d4s=1.6.

[0060] Figure 8C The optical path diagram and light spot simulation diagram of the optical camera in Comparative Example 6 are shown.

[0061] Figure 9A The optical path diagram and light spot simulation diagram of the optical camera of the present invention are shown when R9 / d5s=-0.79;

[0062] Figure 9B The optical path diagram and light spot simulation diagram of the optical camera in Comparative Example 7 are shown.

[0063] Figure 9C The optical path diagram and light spot simulation diagram of the optical camera in Comparative Example 8 are shown. Detailed Implementation

[0064] To better understand the invention, various aspects of the invention will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of the invention and are not intended to limit the scope of the invention in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0065] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of the invention, the first lens discussed below may also be referred to as the second lens or the third lens, or the first lens may also be referred to as the first lens element.

[0066] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0067] In this paper, the paraxial region refers to the area near the optical axis. If the lens surface is convex and its location is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and its location is not defined, it means that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined by the sign of the R value (R refers to the radius of curvature of the paraxial region). In this paper, the surface of each lens closest to the subject is called the object-side surface, and the surface of each lens closest to the image plane is called the image-side surface. For the object-side surface, when the R value is positive, it is considered convex, and when the R value is negative, it is considered concave; for the image-side surface, when the R value is positive, it is considered concave, and when the R value is negative, it is considered convex.

[0068] In this invention, the object side refers to the side of the optical camera facing the object being photographed (not shown in the figure), and the image side refers to the side of the optical camera facing the imaging surface. hereinafter, the object side of a lens refers to the surface of the lens facing the object being photographed (not shown in the figure), and the image side of a lens refers to the surface of the lens facing the imaging surface. The object side of a spacer element refers to the surface of the spacer element facing the object being photographed (not shown in the figure), and the image side of the spacer element refers to the surface of the spacer element facing the imaging surface.

[0069] In the structural schematic diagram shown in this invention, the left side is the object side and the right side is the image side.

[0070] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formal sense, unless expressly so defined herein.

[0071] It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of this invention can be combined with each other. The following embodiments only illustrate several implementation methods of this invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this invention. It should be pointed out that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of this invention, and these all fall within the protection scope of this invention.

[0072] To address the challenge of simultaneously achieving high resolution and low stray light in existing six-element optical imaging lens assemblies while balancing optical performance with small size design, this invention provides an optical camera.

[0073] like Figure 1As shown, the imaging lens group of an exemplary embodiment of the present invention includes six lenses with optical power, which are sequentially included from the object side to the image side along the optical axis as follows: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, wherein each lens is independent of the others and there is an air gap between each lens on the optical axis.

[0074] The plurality of spacers may include a first spacer located between the first lens and the second lens and in at least partial contact with the image-side surface of the first lens, a second spacer located between the second lens and the third lens and in at least partial contact with the image-side surface of the second lens, a third spacer located between the third lens and the fourth lens and in at least partial contact with the image-side surface of the third lens, a fourth spacer located between the fourth lens and the fifth lens and in at least partial contact with the image-side surface of the fourth lens, a fifth spacer located between the fifth lens and the sixth lens and in at least partial contact with the image-side surface of the fifth lens, a sixth spacer located between the sixth lens and the image plane and in at least partial contact with the image-side surface of the sixth lens, and auxiliary spacers used in conjunction with each spacer.

[0075] The imaging lens group and multiple spacer elements are housed within the lens barrel, which includes an object-side end face, an image-side end face, an outer ring surface, and an inner ring surface. Along the optical axis of the optical camera, the inner ring surface of the lens barrel is stepped.

[0076] In some embodiments of the present invention, the optical camera may also include color filters and / or protective glass.

[0077] This invention provides an optical camera, including an imaging lens group and multiple spacer elements; the imaging lens group, along the optical axis from the object side to the image side, sequentially includes: a first lens with positive optical power, a second lens with negative optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with positive optical power, and a sixth lens with positive optical power; the optical camera satisfies: 15.20≤T45 / T56≤24.59; 1.05≤T45 / EP34≤2.01; 1.11≤R8 / d4s≤1.42; 1.09≤R9 / d5s≤-0.63; where T45 is the air gap between the fourth lens and the fifth lens on the optical axis, T56 is the air gap between the fifth lens and the sixth lens on the optical axis, EP34 is the spacing distance between the third spacer element and the fourth spacer element along the optical axis, R8 is the radius of curvature of the image side of the fourth lens, R9 is the radius of curvature of the object side of the fifth lens, d4s is the inner diameter of the object side of the fourth spacer element, and d5s is the inner diameter of the object side of the fifth spacer element.

[0078] By constraining the ratio of the air gaps between the fourth and fifth lenses and between the fifth and sixth lenses, the system optical path layout can be effectively controlled, balancing aberrations and compactness requirements. However, this also makes the fifth and sixth lenses more sensitive to position during assembly, posing a risk of introducing stray light. By limiting 1.05 ≤ T45 / EP34 ≤ 2.01, sufficient structural support thickness between the fourth lens and its adjacent spacer elements is ensured, thereby reducing assembly sensitivity caused by excessively small lens gaps and improving the overall structural stability. Furthermore, by satisfying 1.11 ≤ R8 / d4s ≤ 1.42 and -1.09 ≤ R9 / d5s ≤ -0.63, the ratio of the curvature radius of the image side of the fourth lens and the object side of the fifth lens to the inner diameter of their corresponding spacer elements can be adjusted. This allows for the adjustment of the refraction angle of light between the lenses, effectively reducing optical distortion and improving edge field illumination, while suppressing stray light energy intensity, thus reducing the risk of vignetting and halo effects in the image. By simultaneously satisfying the above relationships, the optical camera can achieve high resolution and low distortion imaging while also taking into account the requirements for stray light suppression, miniaturization, and stability of the module structure.

[0079] like Figure 6A As shown, T45 / T56 = 19.86, and the optical camera satisfies 15.20 ≤ T45 / T56 ≤ 24.59. The modulation transfer function peak values ​​for each field of view are high, the field curvature shows no abnormal deviation, and the curves are uniformly distributed around the diffraction limit line. This indicates that the system can maintain stable imaging sharpness under the condition of satisfying the above relationships. Figure 6B As shown, in Comparative Example 1, T45 / T56 = 14.0, which does not satisfy the constraint 15.20 ≤ T45 / T56 ≤ 24.59. This results in abnormal field curvature deviations in each field of view, leading to blurred images. Figure 6C As shown in Comparative Example 2, T45 / T56=26, which does not satisfy the constraint condition 15.20≤T45 / T56≤24.59. The field curvature of each field of view is excessively shifted in the positive direction, affecting the imaging quality.

[0080] like Figure 7A As shown, T45 / EP34 = 1.63, and the optical camera satisfies 1.05 ≤ T45 / EP34 ≤ 2.01. The modulation functions of each field of view are generally at a high level, with smooth curves that are close to the diffraction limit line, indicating that the imaging consistency of the system is significantly optimized under the above conditions, effectively improving the optical performance; as Figure 7B As shown, in Comparative Example 3, T45 / EP34 = 0.9, which does not satisfy the constraint condition 1.05 ≤ T45 / EP34 ≤ 2.01. The field curvature of each field of view is excessively shifted in the negative direction. Figure 7CAs shown in Comparative Example 4, T45 / EP34=2.1, which does not satisfy the constraint condition 15.20≤T45 / T56≤24.59. The field curvature of each field of view is excessively shifted in the positive direction, and the imaging quality of the system is significantly reduced.

[0081] like Figure 8A As shown, R₈ / d₄s = 1.25, the optical camera satisfies 1.11 ≤ R₈ / d₄s ≤ 1.42, the light spot shape is regular and the energy is concentrated, and the energy intensity is 2.66e⁻⁷; Figure 8B As shown, in Comparative Example 5, R₈ / d₄s = 1.6, which does not satisfy the constraint 1.11 ≤ R₈ / d₄s ≤ 1.42, resulting in a significant increase in stray light energy, with an energy intensity of 1.17e⁻⁶. Figure 8C As shown, in Comparative Example 6, R8 / d4s=1.1, which does not satisfy the constraint condition 1.11≤R8 / d4s≤1.42, resulting in a decrease in stray light control capability and an energy intensity of 5.94e-7.

[0082] like Figure 9A As shown, R9 / d5s = -0.79, the optical camera satisfies -1.09 ≤ R9 / d5s ≤ -0.63, the light spot shape is regular, the energy is concentrated and uniformly distributed, and the energy intensity is 2.7e-7; Figure 9B As shown, in Comparative Example 7, R9 / d5s = -1.2, which does not satisfy the constraint condition -1.09 ≤ R9 / d5s ≤ -0.63. The energy is dispersed and the intensity is significantly increased, making low stray light imaging impossible; the energy intensity is 4.82e-6. Figure 9C As shown, in Comparative Example 8, R9 / d5s = -0.5, which does not satisfy the constraint condition -1.09≤R9 / d5s≤-0.63, resulting in poor energy concentration, reduced stray light control capability, and an energy intensity of 4.91e-6.

[0083] In some embodiments of the present invention, the optical camera satisfies: 4.01 ≤ f12 / (EP01+EP12) ≤ 5.16; where f12 is the combined focal length of the first lens and the second lens, EP01 is the distance along the optical axis between the object-side end face of the lens barrel and the first spacer element, and EP12 is the distance along the optical axis between the first spacer element and the second spacer element. By controlling the combined focal length of the front group and the distance between the spacers, the system can effectively collect a large amount of light, providing high relative illumination for the entire lens and laying a good foundation for subsequent lens group aberration correction.

[0084] In some embodiments of the present invention, the optical camera satisfies: -5.93 ≤ R1 / d1s ≤ -3.94; where d1s is the inner diameter of the object-side surface of the first spacer element, and R1 is the radius of curvature of the object-side surface of the first lens. By limiting the ratio of the inner diameter of the object-side surface of the first spacer element to the radius of curvature of the object-side surface of the first lens, the lens can achieve low distortion while ensuring high resolution at the edges of the image.

[0085] In some embodiments of the present invention, the optical camera satisfies: -3.18 ≤ R2 / D1s ≤ -1.97; where R2 is the radius of curvature of the image-side surface of the first lens, and D1s is the outer diameter of the object-side surface of the first spacer. By limiting the ratio of the radius of curvature of the image-side surface of the first lens to the outer diameter of the object-side surface of the first spacer, it helps to control the incident angle of the principal ray on the second lens, laying a good foundation for subsequent lens group correction of coma, astigmatism, and other off-axis aberrations, and is a key first step in obtaining good edge image quality.

[0086] In some embodiments of the present invention, the optical camera satisfies: -2.03 ≤ D2s / R4 ≤ -1.70; where D2s is the outer diameter of the object-side surface of the second spacer element, and R4 is the radius of curvature of the image-side surface of the second lens. By controlling the ratio of the radius of curvature of the image-side surface of the second lens to the outer diameter of the spacer element, it is possible to effectively cooperate with the first and third lenses while ensuring the formability of the lens, balance the optical power distribution of the system, and focus on correcting the spherical aberration and coma generated by the front lens.

[0087] In some embodiments of the present invention, the optical camera satisfies: 3.27 ≤ d2m / Yc31 ≤ 4.96; where d2m is the inner diameter of the image-side surface of the second spacer, and Yc31 is the perpendicular distance between the point where the positive and negative curvature changes of the object-side surface of the third lens at the off-axis location intersects the optical axis. By controlling the inner diameter of the image-side surface of the second spacer and the perpendicular distance between the point where the positive and negative curvature changes of the object-side surface of the third lens at the off-axis location intersects the optical axis, most of the stray light that generates noise can be effectively blocked, significantly improving the contrast of the image.

[0088] In some embodiments of the present invention, the optical camera satisfies: -20.41 ≤ f3 / EP23 ≤ -12.6; where f3 is the effective focal length of the third lens, and EP23 is the spacing distance between the second spacer element and the third spacer element along the optical axis. By controlling the effective focal length of the third lens and the spacing between the second and third spacers, field curvature and astigmatism generated by the front positive lens group can be corrected, thereby improving the MTF and resolution of the edge field of view.

[0089] In some embodiments of the present invention, the optical camera satisfies: 1.75 ≤ R6 * N3 / d3s ≤ 3.07; where R6 is the radius of curvature of the image-side surface of the third lens, N3 is the refractive index of the third lens, and d3s is the inner diameter of the object-side surface of the third spacer. By constraining the radius of curvature of the image-side surface of the third lens and the inner diameter of the object-side surface of the third spacer, field curvature and astigmatism of the system can be effectively corrected.

[0090] In some embodiments of the present invention, the optical camera satisfies: 5.85 ≤ T45 / |SAG42| ≤ 15.44; where T45 is the air gap between the fourth lens and the fifth lens on the optical axis, and SAG42 is the axial displacement between the intersection of the image-side surface of the fourth lens and the optical axis and the vertex of the effective radius of the image-side surface of the fourth lens. By constraining the air gap between the fourth lens and the fifth lens on the optical axis, reflection loss can be reduced, thereby increasing light transmittance, which helps to improve the relative illumination at the edge of the field of view and prevent the edges of the image from darkening.

[0091] In some embodiments of the present invention, the optical camera satisfies: 0.23 ≤ EP45 / (D5s-D4m) ≤ 1.26; where EP45 is the distance between the fourth and fifth spacers along the optical axis, D5s is the outer diameter of the object-side surface of the fifth spacer, and D4m is the outer diameter of the image-side surface of the fourth spacer. By constraining the distance between the fourth and fifth lens spacers and the difference between the outer diameters of the object-side surfaces of the fourth and fifth spacers, the edge thickness and assembly step difference of the fifth lens can be effectively controlled. This reduces the assembly step difference and improves assembly stability while ensuring lens formability.

[0092] In some embodiments of the present invention, the optical camera satisfies: 1.03 ≤ CT6 * d0m / (D5m - d5m) ≤ 1.69; where CT6 is the center thickness of the sixth lens, d0m is the inner diameter of the image-side end face of the lens barrel, D5m is the outer diameter of the image-side face of the fifth spacer element, and d5m is the inner diameter of the image-side face of the fifth spacer element. Satisfying the above relationship helps improve the illuminance at the edge and center of the chip's image and ensures consistent color response.

[0093] In some embodiments of the present invention, the optical camera satisfies: 24.25 ≤ f4 / EP34 ≤ 37.77; where f4 is the effective focal length of the fourth lens, and EP34 is the distance between the third and fourth spacers along the optical axis. By controlling the effective focal length of the fourth lens and the distance between the third and fourth spacers, smooth light convergence can be ensured, system aberrations can be reduced, and the system's MTF and resolution can be improved.

[0094] In some embodiments of the present invention, the optical camera satisfies: 3.07 ≤ d3s / Yc32 ≤ 3.48; where d3s is the inner diameter of the object-side surface of the third spacer element, and Yc32 is the perpendicular distance between the optical axis and the intersection of the positive and negative curvature changes of the image-side surface of the third lens at the off-axis location. Satisfying the above relationship ensures that the entrance of the third spacer element has a sufficiently large space, allowing the converging imaging light beam to pass through without obstruction, thus laying the foundation for high resolution and contrast in the optical system.

[0095] The optical camera according to the above embodiments of the present invention can employ multiple lenses, such as the six lenses mentioned above. By rationally allocating the optical power, surface shape, and arrangement of the spacers of each lens, the range of each lens-lens connection is made more uniform, enhancing the light-gathering ability and improving the imaging quality of the optical camera.

[0096] In some embodiments of the present invention, the lens material in the optical camera provided by the present invention can be glass or plastic. When the lens material is plastic, production costs can be effectively reduced. When the lens material is glass, the low dispersion characteristic of glass itself can effectively correct the geometric chromatic aberration of the optical camera. The optical camera provided by the present invention can adopt an all-plastic lens structure, which not only gives the lens excellent imaging performance but also allows for a more compact lens structure, achieving a good balance between lens miniaturization and high image quality.

[0097] In some embodiments of the present invention, the first lens, second lens, third lens, fourth lens, fifth lens, and sixth lens can be spherical lenses or aspherical lenses. Compared with spherical structures, aspherical structures can effectively reduce the aberrations of the optical camera, thereby reducing the number of lenses and the size of the lenses, and better achieving lens miniaturization. More specifically, the first lens, second lens, third lens, fourth lens, fifth lens, and sixth lens of the present invention can all be aspherical lenses, which can effectively reduce the aberrations of the optical camera, thereby reducing the number of lenses and the size of the lenses, and achieving lens miniaturization.

[0098] When aspherical lenses are used, the surface shape of each aspherical lens in the optical camera can be defined using, but is not limited to, the following aspherical formulas:

[0099] (1)

[0100] In the above formula, The height perpendicular to the optical axis is along the optical axis. The axial distance from the vertex to the surface at the location; This represents the curvature at the vertex of the aspherical surface. The conic coefficient; , , , , , , ...represent aspheric coefficients of the fourth, sixth, eighth, tenth, twelfth, fourteenth, and sixteenth orders, respectively.

[0101] The present invention will be further described below with reference to several embodiments. In each embodiment, the thickness, radius of curvature, and material selection of each lens in the optical camera are different. For specific differences, please refer to the parameter table of each embodiment. The following embodiments are only preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the following embodiments. Any changes, substitutions, combinations, or simplifications made without departing from the innovative points of the present invention should be considered as equivalent substitutions and are included within the protection scope of the present invention. In addition, it should be noted that in the following Embodiment 1, there are two examples of optical cameras 1001 and 1002; in Embodiment 2, there are two examples of optical cameras 2001 and 2002; in Embodiment 3, there are two examples of optical cameras 3001 and 3002; and in Embodiment 4, there are two examples of optical cameras 4001 and 4002. The structures of the optical cameras in different examples are different, but the optical parameters of the optical cameras in the two examples in the same embodiment are the same, that is, the radius of curvature, center thickness, and other parameters of the first to sixth lenses, as well as the spacing distance and higher-order coefficients between the lenses are the same.

[0102] Example 1

[0103] The following is for reference Figures 2A to 2F The optical camera 1001 and optical camera 1002 according to Embodiment 1 of the present invention are described. Figure 2A , Figure 2B The following are schematic diagrams of the optical camera 1001 and optical camera 1002 according to Embodiment 1 of the present invention.

[0104] In Example 1, as Figure 2A , Figure 2B As shown, optical cameras 1001 and 1002 have the same lens parameters but different structural parameters, and both include a lens barrel, an imaging lens group, and multiple spacer elements.

[0105] The imaging lens group, from the object side to the image side, includes the following lenses in sequence: first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, and sixth lens E6. Specifically, the first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens E2 has positive optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. Light from the object passes sequentially through surfaces S1 to S12 and is finally imaged on imaging surface S15 (not shown in the figure). S13 and S14 are two surfaces of the protective glass or filter (not shown in the figure), OBJ (not shown in the figure) is the object surface, and STO (not shown in the figure) is the aperture stop, which is set on the object side of the first lens E1.

[0106] like Figure 2A , Figure 2B As shown, both optical cameras 1001 and 1002 include a first spacer element P1, a second spacer element P2, a second auxiliary spacer element P2b, a third spacer element P3, a fourth spacer element P4, a fourth auxiliary spacer element P4b, a fifth spacer element P5, and a fifth auxiliary spacer element P5b. The object-side surface of the second auxiliary spacer element P2b is at least partially in contact with the image-side surface of the second spacer element P2; the object-side surface of the fourth auxiliary spacer element P4b is at least partially in contact with the image-side surface of the fourth spacer element P4; and the object-side surface of the fifth auxiliary spacer element P5b is at least partially in contact with the image-side surface of the fifth spacer element P5. However, unlike optical camera 1001, optical camera 1002 also includes a fifth auxiliary spacer element P5c and a sixth spacer element P6. The fifth auxiliary spacer element P5c is located between the fifth auxiliary spacer element P5b and the sixth lens P6, and the object-side surface of the fifth auxiliary spacer element P5c is at least partially in contact with the image-side surface of the fifth auxiliary spacer element P5b.

[0107] Table 1 lists the relevant parameters of each lens in the optical camera of this embodiment, including: surface type, radius of curvature, thickness, refractive index of the material, Abbe number and conic coefficient. The units of radius of curvature and thickness are millimeters (mm).

[0108]

[0109] Table 1

[0110] Table 2 lists the aspherical coefficients of each aspherical lens of the optical camera in this embodiment, including: A4, A6, A8, A... 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0111]

[0112] Table 2

[0113] Figure 2C The on-axis chromatic aberration curve of the optical camera of Embodiment 1 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 2D The astigmatism curve of the optical camera of Embodiment 1 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 2E The distortion curve of the optical camera in Embodiment 1 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 2F The magnification chromatic aberration curve of the optical camera of Embodiment 1 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 2C to 2F As can be seen, the optical camera given in Example 1 can achieve good imaging quality.

[0114] Example 2

[0115] The following is for reference Figures 3A to 3F The optical camera 2001 and optical camera 2002 according to Embodiment 2 of the present invention are described. Figure 3A , Figure 3B The following are schematic diagrams of the optical camera 2001 and optical camera 2002 according to Embodiment 2 of the present invention.

[0116] In Example 2, as Figure 3A , Figure 3B As shown, optical camera 2001 and optical camera 2002 have the same lens parameters but different structural parameters, both including a lens barrel, an imaging lens group and multiple spacer elements.

[0117] The imaging lens group, from the object side to the image side, includes the following lenses in sequence: first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, and sixth lens E6. Specifically, the first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens E2 has positive optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. Light from the object passes sequentially through surfaces S1 to S12 and is finally imaged on imaging surface S15 (not shown in the figure). S13 and S14 are two surfaces of the protective glass or filter (not shown in the figure), OBJ (not shown in the figure) is the object surface, and STO (not shown in the figure) is the aperture stop, which is set on the object side of the first lens E1.

[0118] like Figure 3A , Figure 3B As shown, both optical cameras 2001 and 2002 include a first spacer element P1, a second spacer element P2, a third spacer element P3, a third auxiliary spacer element P3b, a fourth spacer element P4, a fourth auxiliary spacer element P4b, a fifth spacer element P5, and a fifth auxiliary spacer element P5b. The object-side surface of the third auxiliary spacer element P3b is at least partially in contact with the image-side surface of the third spacer element P3; the object-side surface of the fourth auxiliary spacer element P4b is at least partially in contact with the image-side surface of the fourth spacer element P4; and the object-side surface of the fifth auxiliary spacer element P5b is at least partially in contact with the image-side surface of the fifth spacer element P5. However, unlike optical camera 2001, optical camera 2002 also includes a fifth auxiliary spacer element P5c located between the fifth auxiliary spacer element P5b and the sixth lens E6, with its object-side surface at least partially in contact with the image-side surface of the fifth auxiliary spacer element P5b.

[0119] Table 3 lists the relevant parameters of each lens in the optical camera of this embodiment, including: surface type, radius of curvature, thickness, refractive index of the material, Abbe number and conic coefficient. The units of radius of curvature and thickness are millimeters (mm).

[0120]

[0121] Table 3

[0122] Table 4 lists the aspherical coefficients of each aspherical lens of the optical camera in this embodiment, including: A4, A6, A8, A... 10 A 12A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0123]

[0124] Table 4

[0125] Figure 3C The on-axis chromatic aberration curve of the optical camera of Embodiment 2 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 3D The astigmatism curve of the optical camera of Embodiment 2 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 3E The distortion curve of the optical camera in Embodiment 2 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 3F The magnification chromatic aberration curve of the optical camera of Embodiment 2 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 3C to 3F It can be seen that the optical camera given in Embodiment 2 can achieve good imaging quality.

[0126] Example 3

[0127] The following is for reference Figures 4A to 4F The optical camera 3001 and optical camera 3002 according to Embodiment 3 of the present invention are described. Figure 4A , Figure 4B Schematic diagrams of the optical camera 3001 and optical camera 3002 according to Embodiment 3 of the present invention are shown respectively.

[0128] In Example 3, as Figure 4A , Figure 4B As shown, optical cameras 3001 and 3002 have the same lens parameters but different structural parameters, and both include a lens barrel, an imaging lens group, and multiple spacer elements.

[0129] The imaging lens group, from the object side to the image side, includes the following lenses in sequence: first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, and sixth lens E6. Specifically, the first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens E2 has positive optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. Light from the object passes sequentially through surfaces S1 to S12 and is finally imaged on imaging surface S15 (not shown in the figure). S13 and S14 are two surfaces of the protective glass or filter (not shown in the figure), OBJ (not shown in the figure) is the object surface, and STO (not shown in the figure) is the aperture stop, which is set on the object side of the first lens E1.

[0130] like Figure 4A , Figure 4B As shown, both optical cameras 3001 and 3002 include a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fifth spacer element P5, and a fifth auxiliary spacer element P5b. The fifth auxiliary spacer element P5b is located between the fifth spacer element P5 and the sixth lens E6, and its object-side surface is at least partially in contact with the image-side surface of the fifth spacer element P5. However, unlike optical camera 3002, optical camera 3001 also includes a fourth auxiliary spacer element P4b located between the fourth spacer element P4 and the fifth lens E5. The object-side surface of the fourth auxiliary spacer element P4b is at least partially in contact with the image-side surface of the fourth spacer element P4.

[0131] Table 5 lists the relevant parameters of each lens in the optical camera of this embodiment, including: surface type, radius of curvature, thickness, refractive index of the material, Abbe number and conic coefficient, wherein the units of radius of curvature and thickness are millimeters (mm).

[0132]

[0133] Table 5

[0134] Table 6 lists the aspherical coefficients of each aspherical lens of the optical camera in this embodiment, including: A4, A6, A8, A... 10 A 12 A 14 A 16 A 18 A 20A 22 A 24 A 26 A 28 and A 30 .

[0135]

[0136] Table 6

[0137] Figure 4C The on-axis chromatic aberration curve of the optical camera of Embodiment 3 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 4D The astigmatism curves of the optical camera of Embodiment 3 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 4E The distortion curve of the optical camera in Embodiment 3 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 4F The magnification chromatic aberration curve of the optical camera of Embodiment 3 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 4C to 4F It can be seen that the optical camera given in Embodiment 3 can achieve good imaging quality.

[0138] Example 4

[0139] The following is for reference Figures 5A to 5F The optical camera 4001 and optical camera 4002 according to Embodiment 4 of the present invention are described. Figure 5A , Figure 5B Schematic diagrams of the optical camera 4001 and optical camera 4002 according to Embodiment 4 of the present invention are shown respectively.

[0140] In Example 4, as Figure 5A , Figure 5B As shown, optical cameras 4001 and 4002 have the same lens parameters but different structural parameters, both including a lens barrel, an imaging lens group and multiple spacer elements.

[0141] The imaging lens group, from the object side to the image side, includes the following lenses in sequence: first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, and sixth lens E6. Specifically, the first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens E2 has positive optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. Light from the object passes sequentially through surfaces S1 to S12 and is finally imaged on imaging surface S15 (not shown in the figure). S13 and S14 are two surfaces of the protective glass or filter (not shown in the figure), OBJ (not shown in the figure) is the object surface, and STO (not shown in the figure) is the aperture stop, which is set on the object side of the first lens E1.

[0142] like Figure 5A , Figure 5B As shown, both optical cameras 4001 and 4002 include a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fourth auxiliary spacer element P4b, a fifth spacer element P5, and a fifth auxiliary spacer element P5b. The object-side surface of the fourth auxiliary spacer element P4b is at least partially in contact with the image-side surface of the fourth spacer element P4, and the object-side surface of the fifth auxiliary spacer element P5b is at least partially in contact with the image-side surface of the fifth spacer element P5. However, unlike optical camera 4001, optical camera 4002 also includes a fifth auxiliary spacer element P5c located between the fifth auxiliary spacer element P5b and the sixth lens E6, with its object-side surface at least partially in contact with the image-side surface of the fifth auxiliary spacer element P5b.

[0143] Table 7 lists the relevant parameters of each lens in the optical camera of this embodiment, including: surface type, radius of curvature, thickness, refractive index of the material, Abbe number and conic coefficient. The units of radius of curvature and thickness are millimeters (mm).

[0144]

[0145] Table 7

[0146] Table 8 lists the aspherical coefficients of each aspherical lens of the optical camera in this embodiment, including: A4, A6, A8, A... 10 A 12 A 14 A 16 A 18A 20 A 22 A 24 A 26 A 28 and A 30 .

[0147]

[0148] Table 8

[0149] Figure 5C The on-axis chromatic aberration curve of the optical camera of Embodiment 4 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 5D The astigmatism curves of the optical camera of Embodiment 4 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 5E The distortion curve of the optical camera in Embodiment 4 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 5F The magnification chromatic aberration curve of the optical camera of Embodiment 4 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 5C to 5F It can be seen that the optical camera given in Embodiment 4 can achieve good imaging quality.

[0150] In summary, the optical parameters of the optical cameras 1001, 1002, 2001, 2002, 3001, 3002, 4001 and 4002 in Embodiments 1 to 4 are shown in Table 9 below.

[0151]

[0152] Table 9

[0153] The structural parameters of the optical cameras 1001, 1002, 2001, 2002, 3001, 3002, 4001 and 4002 in Embodiments 1 to 4 are shown in Table 10 below, in millimeters (mm).

[0154]

[0155] Table 10

[0156] The optical cameras 1001, 1002, 2001, 2002, 3001, 3002, 4001 and 4002 of Embodiments 1 to 4 satisfy the relationship shown in Table 11.

[0157]

[0158] Table 11

[0159] The above description is merely a preferred embodiment of the present invention and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention is not limited to the specific combination of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this invention.

Claims

1. An optical camera, comprising a lens barrel and an imaging lens group and a plurality of spacer elements housed within the lens barrel, characterized in that, The imaging lens group includes, in sequence along the optical axis from the object side to the image side: a first lens with negative optical power, a second lens with positive optical power, a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens with positive optical power, and a sixth lens with negative optical power. The plurality of spacers include: a third spacer located between the third lens and the fourth lens and in at least partial contact with the image-side surface of the third lens; a fourth spacer located between the fourth lens and the fifth lens and in at least partial contact with the image-side surface of the fourth lens; and a fifth spacer located between the fifth lens and the sixth lens and in at least partial contact with the image-side surface of the fifth lens. The optical camera satisfies the following conditions: 15.20≤T45 / T56≤24.59; 1.05≤T45 / EP34≤2.01; 1.11≤R8 / d4s≤1.42; -1.09≤R9 / d5s≤-0.63; Wherein, T45 is the air gap between the fourth lens and the fifth lens on the optical axis, T56 is the air gap between the fifth lens and the sixth lens on the optical axis, EP34 is the spacing distance between the third spacer element and the fourth spacer element along the optical axis, R8 is the radius of curvature of the image side of the fourth lens, R9 is the radius of curvature of the object side of the fifth lens, d4s is the inner diameter of the object side of the fourth spacer element, and d5s is the inner diameter of the object side of the fifth spacer element.

2. The optical camera according to claim 1, characterized in that, The plurality of spacers further includes: a first spacer located between the first lens and the second lens, and at least partially in contact with the image-side surface of the first lens; and a second spacer located between the second lens and the third lens, and at least partially in contact with the image-side surface of the second lens. The optical camera satisfies: 4.01≤f12 / (EP01+EP12)≤5.16; Wherein, f12 is the combined focal length of the first lens and the second lens, EP01 is the distance between the object-side end face of the lens barrel and the first spacer element along the optical axis, and EP12 is the distance between the first spacer element and the second spacer element along the optical axis.

3. The optical camera according to claim 1, characterized in that, The plurality of spacers further includes: a first spacer, located between the first lens and the second lens, and in at least partial contact with the image side of the first lens; The optical camera satisfies: -5.93≤R1 / d1s≤-3.94; Wherein, d1s is the inner diameter of the object side surface of the first spacer element, and R1 is the radius of curvature of the object side surface of the first lens.

4. The optical camera according to claim 1, characterized in that, The plurality of spacers further includes: a first spacer, located between the first lens and the second lens, and in at least partial contact with the image side of the first lens; The optical camera satisfies: -3.18≤R2 / D1s≤-1.97; Wherein, R2 is the radius of curvature of the image side of the first lens, and D1s is the outer diameter of the object side of the first spacer element.

5. The optical camera according to claim 1, characterized in that, The plurality of spacers further includes: a second spacer located between the second lens and the third lens, and in at least partial contact with the image-side surface of the second lens; The optical camera satisfies: -2.03≤D2s / R4≤-1.70; Wherein, D2s is the outer diameter of the object side of the second spacer element, and R4 is the radius of curvature of the image side of the second lens.

6. The optical camera according to claim 1, characterized in that, The plurality of spacers further includes: a second spacer located between the second lens and the third lens, and in at least partial contact with the image-side surface of the second lens; The optical camera satisfies: 3.27≤d²m / Yc³¹≤4.96; Wherein, d2m is the inner diameter of the image side of the second spacer element, and Yc31 is the perpendicular distance between the object side of the third lens and the optical axis at the intersection of the positive and negative changes in surface curvature at the off-axis location.

7. The optical camera according to claim 1, characterized in that, The plurality of spacers further includes: a second spacer located between the second lens and the third lens, and in at least partial contact with the image-side surface of the second lens; The optical camera satisfies: -20.41≤f3 / EP23≤-12.6; Wherein, f3 is the effective focal length of the third lens, and EP23 is the spacing distance between the second spacer element and the third spacer element along the optical axis.

8. The optical camera according to any one of claims 1 to 7, characterized in that, The optical camera satisfies: 1.75≤R6*N3 / d3s≤3.07; Wherein, R6 is the radius of curvature of the image side of the third lens, N3 is the refractive index of the third lens, and d3s is the inner diameter of the object side of the third spacer element.

9. The optical camera according to any one of claims 1 to 7, characterized in that, The optical camera satisfies: 5.85≤T45 / |SAG42|≤15.44; Wherein, T45 is the air gap between the fourth lens and the fifth lens on the optical axis, and SAG42 is the axial displacement between the intersection of the image-side surface of the fourth lens and the optical axis and the vertex of the effective radius of the image-side surface of the fourth lens.

10. The optical camera according to any one of claims 1 to 7, characterized in that, The optical camera satisfies: 0.23≤EP45 / (D5s-D4m)≤1.26; Wherein, EP45 is the spacing distance between the fourth spacer element and the fifth spacer element along the optical axis, D5s is the outer diameter of the object side of the fifth spacer element, and D4m is the outer diameter of the image side of the fourth spacer element.

11. The optical camera according to any one of claims 1 to 7, characterized in that, The optical camera satisfies: 1.03≤CT6*d0m / (D5m-d5m)≤1.69; Wherein, CT6 is the center thickness of the sixth lens, d0m is the inner diameter of the image-side end face of the lens barrel, D5m is the outer diameter of the image-side surface of the fifth spacer element, and d5m is the inner diameter of the image-side surface of the fifth spacer element.

12. The optical camera according to any one of claims 1 to 7, characterized in that, The optical camera satisfies: 24.25≤f4 / EP34≤37.77; Wherein, f4 is the effective focal length of the fourth lens, and EP34 is the spacing distance between the third and fourth spacers along the optical axis.

13. The optical camera according to any one of claims 1 to 7, characterized in that, The optical camera satisfies: 3.07≤d3s / Yc32≤3.48; Wherein, d3s is the inner diameter of the object side of the third spacer element, and Yc32 is the perpendicular distance between the point where the positive and negative curvature of the image side of the third lens changes at the off-axis and the optical axis.

Images