Imaging modules, electronic devices and automobiles

Abstract

The present invention relates to an imaging module, an electronic device, and an automobile. The imaging module comprises, from the object side to the image side, a first lens having negative refractive power; a second lens having positive refractive power, the object-side surface of the second lens being convex; a third lens having refractive power; a fourth lens having positive refractive power, the object-side surface and the image-side surface of the fourth lens being convex; and a fifth lens having negative refractive power, the object-side surface of the fifth lens being concave and the image-side surface of the fifth lens being convex. By rationally matching the refractive power of each lens and limiting the surface shapes of the fourth and fifth lenses, the imaging module is endowed with a wide field of view.

Description

Technical Field

[0001] The present invention relates to the field of optical imaging, and in particular to an imaging module, an electronic device and a car. Background Art

[0002] Due to the limitations of the car body structure, family cars have multiple blind spots in their field of vision, and large trucks have even larger blind spots. Drivers cannot see these blind spots, which can easily lead to traffic accidents.

[0003] The side mirrors only provide a narrow view of the vehicle's surroundings and cannot capture all surrounding information. For example, when turning from a side road to the main road, the driver's left mirror cannot fully see the car on the left. If the driver accelerates and cuts into the innermost lane at a high angle, they could easily collide with the high-speed car in the innermost lane. Although the blind spots on both sides can be reduced by adjusting the rearview mirror angle or installing a convex mirror, the actual effect is minimal. Summary of the Invention

[0004] Based on this, it is necessary to provide an imaging module, an electronic device and a car to solve the problem of narrow viewing angle.

[0005] An imaging module, comprising, from the object side to the image side, the following components:

[0006] a first lens element having negative refractive power;

[0007] a second lens having positive refractive power, wherein the object-side surface of the second lens is convex;

[0008] a third lens having refractive power;

[0009] a fourth lens element having positive refractive power, wherein both the object-side surface and the image-side surface of the fourth lens element are convex; and

[0010] A fifth lens element having negative refractive power, wherein the object-side surface of the fifth lens element is concave and the image-side surface of the fifth lens element is convex.

[0011] In the above structure, the first lens provides negative refractive power, which can increase the field of view angle of the imaging module; the second lens provides positive refractive power to cooperate with the first lens to avoid excessive negative refractive power at the front end of the imaging module (the first lens and the second lens), thereby shortening the length of the imaging module in the optical axis direction to achieve miniaturization; the fourth lens provides positive refractive power to balance the refractive power configuration of the imaging module and suppress the angle of light incident on the imaging surface. In addition, the biconvex structure of the fourth lens can achieve a better focusing effect to shorten the length of the imaging module in the optical axis direction.

[0012] In one embodiment, the imaging module further includes an aperture, and the aperture is disposed between the object side of the first lens and the fourth lens.

[0013] In one embodiment, the imaging module satisfies the following relationship:

[0014] -7.00<f1 / f<0;

[0015] Wherein, f1 is the focal length of the first lens, and f is the effective focal length of the imaging module. When the above relationship is satisfied, the first lens can provide negative refractive power for the imaging module, so that the imaging module has a wide viewing angle characteristic.

[0016] In one embodiment, the imaging module satisfies the following relationship:

[0017] f45 / f>1.50;

[0018] Where f45 is the combined focal length of the fourth and fifth lenses, and f is the effective focal length of the imaging module. When the above relationship is satisfied, it helps to configure sufficient refractive power at the image-side end of the imaging module (at the fourth and fifth lenses), thereby reducing the sensitivity of the imaging module.

[0019] In one embodiment, the imaging module satisfies the following relationship:

[0020] 1.00≤CT2 / CT3<5.00;

[0021] Where CT2 is the thickness of the second lens on the optical axis, and CT3 is the thickness of the third lens on the optical axis. When the above relationship is satisfied, the problem of poor molding of the second and third lenses can be effectively avoided, while also helping to increase the uniformity of lens molding.

[0022] In one embodiment, the imaging module satisfies the following relationship:

[0023] ΣCT / TL<0.70;

[0024] Where ΣCT is the sum of the thicknesses of the first, second, third, fourth, and fifth lenses along the optical axis, and TL is the distance along the optical axis from the object-side surface of the first lens to the imaging surface of the imaging module. When this relationship is satisfied, the thickness of each lens can be appropriately set, reducing the manufacturing difficulty of each lens and improving the yield. This also shortens the optical axis dimensions of the imaging module and increases the mechanical focal length, facilitating focusing.

[0025] In one embodiment, the imaging module satisfies the following relationship:

[0026] ET4≥0.47;

[0027] Wherein, ET4 is the lens thickness of the fourth lens corresponding to a radius of 3.3 mm in the direction perpendicular to the optical axis, and the unit of ET4 is mm. When the above relationship is satisfied, the processing difficulty of the fourth lens can be reduced and the yield rate can be improved.

[0028] In one embodiment, the imaging module satisfies the following relationship:

[0029] |R3| / |R4|≤5.00;

[0030] 1.00<|R5| / |R6|<2.00;

[0031] Wherein, R3 is the radius of curvature of the object side surface of the second lens at the optical axis, R4 is the radius of curvature of the image side surface of the second lens at the optical axis, R5 is the radius of curvature of the object side surface of the third lens at the optical axis, and R6 is the radius of curvature of the image side surface of the third lens at the optical axis. When the above relationship is satisfied, the radius of curvature of the object side surface and the image side surface of the second lens and the third lens on the optical axis can be reasonably set so that the difference in the radius of curvature of the two surfaces of the second lens at the optical axis is similar, and the difference in the radius of curvature of the two surfaces of the third lens at the optical axis is similar, thereby making the second lens and the third lens easy to produce and process. If the radius of curvature of the object side surface or the image side surface is too large, a larger focal length will be produced and deviation will be easily generated; if the difference in the radius of curvature of the two surfaces is too large, the processing difficulty will be increased and the precision stability will be reduced.

[0032] In one embodiment, the imaging module satisfies the following relationship:

[0033] 0≤|V2-V5|<35.00;

[0034] Wherein, V2 is the dispersion coefficient of the second lens, and V5 is the dispersion coefficient of the fifth lens. By rationally configuring the materials of the second lens and the third lens to satisfy the above relationship, the chromatic aberration of the imaging module is reduced and the imaging quality is improved.

[0035] In one embodiment, the imaging module satisfies the following relationship:

[0036] (CT4-CT5) / (α4-α5)<0;

[0037] Wherein, CT4 is the thickness of the fourth lens on the optical axis, and the unit of CT4 is mm; CT5 is the thickness of the fifth lens on the optical axis, and the unit of CT5 is mm; α4 is the thermal expansion coefficient of the fourth lens, and the unit of α4 is 10 -6 / k; α5 is the thermal expansion coefficient of the fifth lens, and the unit of α5 is 10 -6 By rationally matching the thicknesses of the fourth and fifth lenses on the optical axis and their respective materials to meet the aforementioned relationship, the effects of temperature on the imaging module are reduced, enabling the imaging module to maintain good imaging quality at both high and low temperatures. Furthermore, if the fourth and fifth lenses are cemented together, the difference in thickness and material properties between the two lenses on the optical axis can be minimized, reducing the risk of cracking in the cemented lens.

[0038] In one embodiment, the imaging module satisfies the following relationship:

[0039] f / EPD≤2.00;

[0040] Where f is the effective focal length of the imaging module, and EPD is the entrance pupil diameter of the imaging module. When the above relationship is met, the imaging module can provide a larger entrance pupil, expand the aperture, and increase the amount of light entering, thereby enabling the imaging module to maintain excellent imaging quality in dark environments.

[0041] In one embodiment, the imaging module further includes a photosensitive chip, which is disposed on the image side of the fifth lens. The imaging module satisfies the following relationship:

[0042] TL / Imgh≤3.50;

[0043] Wherein, TL is the distance from the object side of the first lens to the imaging surface of the imaging module on the optical axis, and Imgh is the diagonal length of the photosensitive area in the photosensitive chip. When the above relationship is satisfied, the imaging module can meet the requirements of high pixel density while also meeting the requirements of miniaturization.

[0044] In one embodiment, the imaging module further includes a photosensitive chip, which is disposed on the image side of the fifth lens. The imaging module satisfies the following relationship:

[0045] tan[(1 / 2)FOV] / Y>0.25;

[0046] Where FOV is the field of view of the imaging module, and Y is half the diagonal length of the photosensitive area of ​​the photosensitive chip, with the unit of Y being mm. When the above relationship is met, the imaging module can be guaranteed to have high pixel characteristics, thereby achieving better wide-angle photography effects.

[0047] An electronic device includes a display module and the imaging module described in any one of the above embodiments, wherein the imaging module is communicatively connected to the display module, and the image obtained by the imaging module can be displayed on the display module.

[0048] A car includes a car body and the electronic device described in the above embodiment, wherein the display module is arranged in the car body, and the imaging module is arranged on the left side and / or right side of the car body. The imaging module is communicatively connected to the display module, and the imaging module is used to collect image information from the side and rear of the car. The image information obtained by the imaging module can be displayed on the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 A schematic diagram of an imaging module provided in a first embodiment of the present invention;

[0050] Figure 2 : spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the imaging module in the first embodiment;

[0051] Figure 3 A schematic diagram of an imaging module provided in a second embodiment of the present invention;

[0052] Figure 4 : spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the imaging module in the second embodiment;

[0053] Figure 5 A schematic diagram of an imaging module provided in a third embodiment of the present invention;

[0054] Figure 6 : spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the imaging module in the third embodiment;

[0055] Figure 7 A schematic diagram of an imaging module provided in a fourth embodiment of the present invention;

[0056] Figure 8 spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the imaging module in the fourth embodiment;

[0057] Figure 9 A schematic diagram of an imaging module provided in a fifth embodiment of the present invention;

[0058] Figure 10 : spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the imaging module in the fifth embodiment;

[0059] Figure 11 A schematic diagram of an imaging module provided in a sixth embodiment of the present invention;

[0060] Figure 12 : spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the imaging module in the sixth embodiment;

[0061] Figure 13A schematic diagram of an imaging module provided by a seventh embodiment of the present invention;

[0062] Figure 14 spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the imaging module in the seventh embodiment;

[0063] Figure 15 A schematic diagram of an imaging module provided in an eighth embodiment of the present invention;

[0064] Figure 16 : spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the imaging module in the eighth embodiment;

[0065] Figure 17 A schematic diagram of an imaging module provided in a ninth embodiment of the present invention;

[0066] Figure 18 spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the imaging module in the ninth embodiment;

[0067] Figure 19 A schematic diagram of an imaging module provided in another embodiment of the present invention;

[0068] Figure 20 A schematic diagram of an electronic device provided in accordance with an embodiment of the present invention;

[0069] Figure 21 A schematic diagram of a car using an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0070] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive disclosure of the present invention.

[0071] It should be noted that when an element is referred to as being "fixed to" another component, it may be directly on the other component or there may be a central element. When an element is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another component, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0072] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0073] refer to Figure 1 As shown, the imaging module 100 in the embodiment of the present application includes, from the object side to the image side, a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, a third lens L3 with refractive power, a fourth lens L4 with positive refractive power, and a fifth lens L5 with negative refractive power.

[0074] The first lens L1 includes an object-side surface S1 and an image-side surface S2. The second lens L2 includes an object-side surface S3 and an image-side surface S4. The third lens L3 includes an object-side surface S5 and an image-side surface S6. The fourth lens L4 includes an object-side surface S7 and an image-side surface S8. The fifth lens L5 includes an object-side surface S9 and an image-side surface S10. Furthermore, the image side of the fifth lens L5 also includes an imaging surface S15, which can be the photosensitive surface of a photosensitive chip.

[0075] The object-side surface S3 of the second lens L2 is convex. The object-side surface S7 and image-side surface S8 of the fourth lens L4 are both convex. The object-side surface S9 of the fifth lens L5 is concave, and the image-side surface S10 is convex.

[0076] In addition, the aspheric surface formulas of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 are:

[0077]

[0078] Where Z is the distance from the corresponding point on the aspheric surface to the plane tangent to the vertex of the surface, r is the distance from the corresponding point on the aspheric surface to the optical axis, c is the curvature of the aspheric vertex, k is the cone constant, and Ai is the coefficient corresponding to the i-th higher-order term in the aspheric surface shape formula.

[0079] In some embodiments, the imaging module 100 further includes an aperture ST0. The aperture ST0 may be disposed between the object side of the first lens L1 and the fourth lens L4. Specifically, in some embodiments, the aperture ST0 may be disposed between the second lens L2 and the third lens L3, or between the third lens L3 and the fourth lens L4.

[0080] In some embodiments, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 are all made of plastic. In this case, the plastic lenses can reduce the weight of the imaging module 100 and reduce the production cost. In some embodiments, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 are all made of glass. In this case, the imaging module 100 can withstand higher temperatures and has better optical performance. In other embodiments, only the first lens L1 can be made of glass, while the other lenses are made of plastic. In this case, the first lens L1 closest to the object side can better withstand the influence of the ambient temperature on the object side, and because the other lenses are made of plastic, the imaging module 100 maintains a lower production cost. Alternatively, in some embodiments, the first lens L1 is made of glass, and the materials of the other lenses can be arbitrarily combined.

[0081] In some embodiments, the imaging module 100 is equipped with a glass infrared filter L6, which is positioned on the image side of the fifth lens element L5. The infrared filter L6 includes an object-side surface S11 and an image-side surface S12. The infrared filter L6 is used to filter imaging light, specifically to block infrared light from reaching the imaging surface S15. This prevents infrared light from affecting the color and clarity of normal images, thereby improving the imaging quality of the imaging module 100.

[0082] In some embodiments, the imaging module 100 further includes a protective glass L7. The protective glass L7 includes an object-side surface S13 and an image-side surface S14. The protective glass L7 is positioned on the image side of the infrared filter L6 to allow proximity to the photosensitive chip during subsequent module assembly, thereby protecting the photosensitive chip.

[0083] In some embodiments, the imaging module 100 satisfies the following relationship:

[0084] -7.00<f1 / f<0;

[0085] Where f1 is the focal length of the first lens L1, and f is the effective focal length of the imaging module 100. In some embodiments, f1 / f can be -1.45, -1.35, -1.30, -1.25, -1.20, -1.15, -1.10, or -1.05. When the above relationship is satisfied, the first lens L1 can provide negative refractive power to the imaging module 100, giving the imaging module 100 a wide viewing angle.

[0086] In some embodiments, the imaging module 100 satisfies the following relationship:

[0087] f45 / f>1.50;

[0088] Where f45 is the combined focal length of the fourth lens element L4 and the fifth lens element L5, and f is the effective focal length of the imaging module 100. In some embodiments, f45 / f can be 1.70, 1.80, 1.90, 2.00, 2.10, 2.20, 2.30, 2.40, or 2.50. Meeting this relationship helps ensure sufficient refractive power at the image-side end of the imaging module 100 (at the fourth lens element L4 and the fifth lens element L5), thereby reducing the sensitivity of the imaging module 100.

[0089] In some embodiments, the imaging module 100 satisfies the following relationship:

[0090] 1.00≤CT2 / CT3<5.00;

[0091] Where CT2 is the thickness of the second lens element L2 along the optical axis, and CT3 is the thickness of the third lens element L3 along the optical axis. In some embodiments, CT2 / CT3 can be 1.10, 1.50, 2.00, 2.50, 3.00, 3.50, or 4.00. Meeting this relationship effectively avoids molding defects of the second lens element L2 and the third lens element L3, while also improving lens molding uniformity.

[0092] In some embodiments, the imaging module 100 satisfies the following relationship:

[0093] ΣCT / TL<0.70;

[0094] Wherein, ΣCT is the sum of the thicknesses of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 along the optical axis, and TL is the distance along the optical axis from the object-side surface S1 of the first lens L1 to the imaging surface S15 of the imaging module 100. In some embodiments, ΣCT / TL can be 0.42, 0.45, 0.50, 0.55, or 0.62. When the above relationship is satisfied, the thickness of each lens can be reasonably set, reducing the processing difficulty of each lens to improve the yield, while also shortening the size of the imaging module 100 along the optical axis and increasing the mechanical focal length, thereby facilitating focusing.

[0095] In some embodiments, the imaging module 100 satisfies the following relationship:

[0096] ET4≥0.47mm;

[0097] Wherein, ET4 is the lens thickness of the fourth lens element L4 corresponding to a radius of 3.3 mm perpendicular to the optical axis, and the unit of ET4 is mm. In some embodiments, the value of ET4 can be 0.50 mm, 0.55 mm, 0.60 mm, 0.80 mm, 0.90 mm, 1.00 mm, 1.20 mm, 1.40 mm, or 1.50 mm. When the above relationship is met, the processing difficulty of the fourth lens element L4 can be reduced, and the yield rate can be improved.

[0098] In some embodiments, the imaging module 100 satisfies the following relationship:

[0099] |R3| / |R4|≤5.00;

[0100] 1.00<|R5| / |R6|<2.00;

[0101] Wherein, R3 is the radius of curvature of the object-side surface S3 of the second lens element L2 at the optical axis, R4 is the radius of curvature of the image-side surface S4 of the second lens element L2 at the optical axis, R5 is the radius of curvature of the object-side surface S5 of the third lens element L3 at the optical axis, and R6 is the radius of curvature of the image-side surface S6 of the third lens element L3 at the optical axis. In some embodiments, the relationship between |R3| and |R4| may be 0.15, 0.20, 1.00, 2.50, 3.50, 4.50, 4.90, or 4.95; and the relationship between |R5| and |R6| may be 1.30, 1.50, 1.60, 1.70, 1.80, or 1.90. When the above relationship is satisfied, the radii of curvature of the object-side and image-side surfaces of the second and third lens elements L2 and L3, along the optical axis, can be appropriately set, ensuring that the difference in the radii of curvature of the two surfaces of the second lens element L2 and the image-side surfaces along the optical axis is similar. This, in turn, makes the second and third lens elements L2 and L3 easier to manufacture and process. If the radius of curvature of the object-side or image-side surfaces is too large, the focal length will be larger and prone to deviation. If the difference in the radii of curvature of the two surfaces is too large, manufacturing will be more difficult and precision stability will be reduced.

[0102] In some embodiments, the imaging module 100 satisfies the following relationship:

[0103] 0≤|V2-V5|<35.00;

[0104] Where V2 is the Abbe number of the second lens element L2, and V5 is the Abbe number of the fifth lens element L5. In some embodiments, the relationship |V2 - V5| can be 1.00, 2.00, 2.50, 10.00, 11.00, 28.00, or 28.50. By rationally configuring the materials of the second lens element L2 and the third lens element L3 to satisfy the above relationship, chromatic aberration of the imaging module 100 is reduced, thereby improving image quality.

[0105] In some embodiments, the imaging module 100 satisfies the following relationship:

[0106] (CT4-CT5) / (α4-α5)<0;

[0107] Wherein, CT4 is the thickness of the fourth lens L4 on the optical axis, and the unit of CT4 is mm; CT5 is the thickness of the fifth lens L5 on the optical axis, and the unit of CT5 is mm; α4 is the thermal expansion coefficient of the fourth lens L4, and the unit of α4 is 10 -6 / k; α5 is the thermal expansion coefficient of the fifth lens L5, and the unit of α5 is 10 -6 / k. In some embodiments, the relationship (CT4-CT5) / (α4-α5) can be -8.00, -6.00, -4.00, or -3.00. By rationally matching the thicknesses and materials of the fourth lens L4 and the fifth lens L5 on the optical axis to satisfy the aforementioned relationship, the impact of temperature on the imaging module 100 is reduced, enabling the imaging module 100 to maintain good imaging quality at both high and low temperatures. Furthermore, if the fourth lens L4 and the fifth lens L5 are cemented together, the difference in thickness and material properties between the two lenses on the optical axis can be minimized, reducing the risk of cracking in the cemented lens.

[0108] In some embodiments, the imaging module 100 satisfies the following relationship:

[0109] f / EPD≤2.00;

[0110] Where f is the effective focal length of the imaging module 100, and EPD is the entrance pupil diameter of the imaging module 100. In some embodiments, the relationship f / EPD can be 1.83, 1.85, 1.90, 1.93, or 1.95. When this relationship is met, the imaging module 100 can provide a larger entrance pupil, expand the aperture, and increase the amount of light entering, thereby ensuring that the imaging module 100 still has excellent imaging quality in dark environments.

[0111] In some embodiments, the imaging module 100 further includes a photosensitive chip, which is disposed on the image side of the fifth lens L5. The imaging module 100 satisfies the following relationship:

[0112] TL / Imgh≤3.50;

[0113] Where TL is the distance on the optical axis from the object-side surface S1 of the first lens L1 to the imaging surface S15 of the imaging module 100, and Imgh is the diagonal length of the photosensitive area of ​​the photosensitive chip. In some embodiments, the relationship TL / Imgh can be 3.20, 3.25, 3.30, 3.35, 3.40, or 3.45. When this relationship is met, the imaging module can meet the requirements of high pixel density while also being compact.

[0114] In some embodiments, the imaging module 100 further includes a photosensitive chip, which is disposed on the image side of the fifth lens L5. The imaging module 100 satisfies the following relationship:

[0115] tan[(1 / 2)FOV] / Y>0.25;

[0116] Where FOV is the field of view of the imaging module 100, and Y is half the diagonal length of the photosensitive area of ​​the photosensitive chip, with the unit of Y being mm. In some embodiments, the relationship tan[(1 / 2)FOV] / Y can be 0.30, 0.32, 0.37, 0.38, or 0.39. When the above relationship is met, the imaging module can be guaranteed to have high pixel density, thereby achieving excellent wide-angle photography effects.

[0117] First embodiment

[0118] like Figure 1 In the first embodiment shown, the imaging module 100 includes, from the object side to the image side, a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, a third lens L3 with negative refractive power, an aperture ST0, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, an infrared filter L6 and a protective glass L7. Figure 2 The spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the imaging module 100 in the first embodiment are shown. The astigmatism diagram and distortion diagram are data diagrams at a reference wavelength. The reference wavelength in this embodiment and the following embodiments is 587.6 nm.

[0119] The object-side surface S1 of the first lens L1 is convex along the optical axis, and the image-side surface S2 of the first lens L1 is concave along the optical axis; the object-side surface S1 of the first lens L1 is convex along the circumference, and the image-side surface S2 of the first lens L1 is concave along the circumference. The object-side surface S3 of the second lens L2 is convex along the optical axis, and the image-side surface S4 of the second lens L2 is convex along the optical axis; the object-side surface S3 of the second lens L2 is convex along the circumference, and the image-side surface S4 of the second lens L2 is convex along the circumference. The object-side surface S5 of the third lens L3 is convex along the optical axis, and the image-side surface S6 of the third lens L3 is concave along the optical axis; the object-side surface S5 of the third lens L3 is convex along the circumference, and the image-side surface S6 of the third lens L3 is concave along the circumference. The object-side surface S7 of the fourth lens element L4 is convex along the optical axis, and the image-side surface S8 of the fourth lens element L4 is convex along the optical axis. The object-side surface S7 of the fourth lens element L4 is convex along the circumference, and the image-side surface S8 of the fourth lens element L4 is convex along the circumference. The object-side surface S9 of the fifth lens element L5 is concave along the optical axis, and the image-side surface S10 of the fifth lens element L5 is convex along the optical axis. The object-side surface S9 of the fifth lens element L5 is concave along the circumference, and the image-side surface S10 of the fifth lens element L5 is convex along the circumference.

[0120] The object-side surfaces and image-side surfaces of the first lens L1 , the second lens L2 , and the fifth lens L5 are all spherical surfaces, and the object-side surfaces and image-side surfaces of the third lens L3 and the fourth lens L4 are all aspherical surfaces.

[0121] In addition, the first lens L1 , the second lens L2 , the fourth lens L4 , the fifth lens L5 , the infrared filter L6 , and the protective glass L7 are all made of glass, and the third lens L3 is made of plastic.

[0122] Specifically, the imaging module 100 satisfies the following relationship:

[0123] f1 / f=-1.06;

[0124] Wherein, f1 is the focal length of the first lens L1, and f is the effective focal length of the imaging module 100. When the above relationship is satisfied, the first lens L1 can provide negative refractive power for the imaging module 100, so that the imaging module 100 has a wide viewing angle.

[0125] The imaging module 100 satisfies the following relationship:

[0126] f45 / f=2.07;

[0127] Where f45 is the combined focal length of the fourth lens element L4 and the fifth lens element L5, and f is the effective focal length of the imaging module 100. When this relationship is satisfied, sufficient refractive power is provided at the image-side end of the imaging module 100 (at the fourth lens element L4 and the fifth lens element L5), thereby reducing the sensitivity of the imaging module 100.

[0128] The imaging module 100 satisfies the following relationship:

[0129] CT2 / CT3=4.05;

[0130] Where CT2 is the thickness of the second lens element L2 along the optical axis, and CT3 is the thickness of the third lens element L3 along the optical axis. When these relationships are met, poor molding of the second and third lenses L2 and L3 can be avoided, while also helping to improve lens molding uniformity.

[0131] The imaging module 100 satisfies the following relationship:

[0132] ΣCT / TL=0.40;

[0133] Where ΣCT is the sum of the thicknesses of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 along the optical axis, and TL is the distance along the optical axis from the object-side surface S1 of the first lens L1 to the imaging surface S15 of the imaging module 100. When this relationship is satisfied, the thicknesses of the individual lenses can be appropriately set, reducing the manufacturing difficulty and improving the yield. This also shortens the optical axis dimensions of the imaging module 100 and increases the mechanical focal length, facilitating focusing.

[0134] The imaging module 100 satisfies the following relationship:

[0135] ET4=0.47mm;

[0136] Wherein, ET4 is the lens thickness of the fourth lens element L4 corresponding to a radius of 3.3 mm in the direction perpendicular to the optical axis, and the unit of ET4 is mm. When the above relationship is satisfied, the processing difficulty of the fourth lens element L4 can be reduced and the yield rate can be improved.

[0137] The imaging module 100 satisfies the following relationship:

[0138] |R3| / |R4|=1.00;

[0139] |R5| / |R6|=1.42;

[0140] Wherein, R3 is the radius of curvature of the object-side surface S3 of the second lens element L2 along the optical axis, R4 is the radius of curvature of the image-side surface S4 of the second lens element L2 along the optical axis, R5 is the radius of curvature of the object-side surface S5 of the third lens element L3 along the optical axis, and R6 is the radius of curvature of the image-side surface S6 of the third lens element L3 along the optical axis. When the above relationship is satisfied, the radii of curvature of the object-side and image-side surfaces of the second and third lens elements L2 and L3 along the optical axis can be appropriately set, ensuring that the difference in the radii of curvature of the two surfaces of the second lens element L2 along the optical axis is similar, and that the difference in the radii of curvature of the two surfaces of the third lens element L3 along the optical axis is similar, thereby facilitating the production and processing of the second and third lens elements L2 and L3.

[0141] The imaging module 100 satisfies the following relationship:

[0142] |V2-V5|=28.70;

[0143] Wherein, V2 is the dispersion coefficient of the second lens L2, and V5 is the dispersion coefficient of the fifth lens L5. By rationally configuring the materials of the second lens L2 and the third lens L3 to satisfy the above relationship, the chromatic aberration of the imaging module 100 is reduced and the imaging quality is improved.

[0144] The imaging module 100 satisfies the following relationship:

[0145] (CT4-CT5) / (α4-α5)=-8.35;

[0146] Wherein, CT4 is the thickness of the fourth lens L4 on the optical axis, and the unit of CT4 is mm; CT5 is the thickness of the fifth lens L5 on the optical axis, and the unit of CT5 is mm; α4 is the thermal expansion coefficient of the fourth lens L4, and the unit of α4 is 10 -6 / k; α5 is the thermal expansion coefficient of the fifth lens L5, and the unit of α5 is 10 -6 By rationally matching the thicknesses of the fourth lens L4 and the fifth lens L5 on the optical axis and their respective materials to satisfy the above relationship, the effect of temperature on the imaging module 100 is reduced, so that the imaging module 100 maintains good imaging quality at high or low temperatures.

[0147] The imaging module 100 satisfies the following relationship:

[0148] f / EPD=1.80;

[0149] Where f is the effective focal length of the imaging module 100, and EPD is the entrance pupil diameter of the imaging module 100. When the above relationship is met, the imaging module 100 can provide a larger entrance pupil and expand the aperture to increase the amount of light entering, thereby ensuring that the imaging module 100 still has excellent imaging quality in dark environments.

[0150] When a photosensitive chip is provided on the image side of the fifth lens L5, the imaging module 100 satisfies the following relationship:

[0151] TL / Imgh=3.42;

[0152] Wherein, TL is the distance on the optical axis from the object-side surface S1 of the first lens L1 to the imaging surface S15 of the imaging module 100, and Imgh is the diagonal length of the photosensitive area in the photosensitive chip. When the above relationship is satisfied, the imaging module can meet the requirements of high pixel density while also meeting the requirements of miniaturization.

[0153] When a photosensitive chip is provided on the image side of the fifth lens L5, the imaging module 100 satisfies the following relationship:

[0154] tan[(1 / 2)FOV] / Y=0.28;

[0155] Where FOV is the field of view of the imaging module 100, and Y is half the diagonal length of the photosensitive area of ​​the photosensitive chip, with the unit of Y being mm. When the above relationship is met, the imaging module can be guaranteed to have high pixel characteristics, thereby achieving better wide-angle photography effects.

[0156] In the first embodiment, the effective focal length f of the imaging module 100 is 4.62 mm, the aperture value FNO is 1.80, and the maximum field of view FOV is 80.16 degrees.

[0157] In addition, the parameters of the imaging module 100 are given in Tables 1 and 2. The components from the object plane to the imaging plane S15 are arranged in the order of the components from top to bottom in Table 1. Surface numbers 1 and 2 are respectively the object side surface S1 and the image side surface S2 of the first lens L1, that is, in the same lens, the surface with the smaller surface number is the object side surface, and the surface with the larger surface number is the image side surface. The R radius in Table 1 is the radius of curvature of the object side surface or the image side surface of the corresponding surface number at the optical axis. The first value in the "thickness" parameter column of the first lens L1 is the thickness of the lens on the optical axis, and the second value is the distance from the image side surface of the lens to the object side surface of the next lens on the optical axis. The "thickness" parameter in surface number 6 is the distance from the image side surface S6 of the third lens L3 to the aperture ST0. The value for stop ST0 in the "Thickness" parameter column is the distance along the optical axis from stop ST0 to the vertex of the object side of the next lens element (the vertex refers to the intersection of the lens and the optical axis). The positive direction of the optical axis is assumed to be the direction from the object side of the first lens element to the image side of the last lens element. A negative value indicates that stop ST0 is located to the right of the vertex of the object side of the lens element. A positive value for the "Thickness" parameter for stop ST0 indicates that stop ST0 is located to the left of the vertex of the object side of the lens element. The "Thickness" parameter for surface number 11 is the distance along the optical axis from the image side surface S10 of the fifth lens element L5 to the object side surface S11 of the infrared filter L6. The value corresponding to surface number 13 in the "Thickness" parameter for infrared filter L6 (the filter in Table 1) is the distance along the optical axis from the image side surface S12 of infrared filter L6 to the object side surface S13 of cover glass L7. Table 2 is a table of relevant parameters of the aspheric surface of each lens in Table 1, where K is the cone constant and Ai is the coefficient corresponding to the i-th high-order term in the aspheric surface formula.

[0158] In addition, in the following embodiments, the refractive index and focal length of each lens are values ​​at a reference wavelength.

[0159] Table 1

[0160]

[0161]

[0162] Table 2

[0163]

[0164] Second embodiment

[0165] like Figure 3 In the second embodiment shown, the imaging module 100 includes, from the object side to the image side, a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, a third lens L3 with negative refractive power, an aperture ST0, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, an infrared filter L6 and a protective glass L7. Figure 4 : spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the imaging module 100 in the second embodiment, wherein the astigmatism diagram and distortion diagram are data diagrams at a reference wavelength.

[0166] The object-side surface S1 of the first lens L1 is convex along the optical axis, and the image-side surface S2 of the first lens L1 is concave along the optical axis; the object-side surface S1 of the first lens L1 is convex along the circumference, and the image-side surface S2 of the first lens L1 is concave along the circumference. The object-side surface S3 of the second lens L2 is convex along the optical axis, and the image-side surface S4 of the second lens L2 is convex along the optical axis; the object-side surface S3 of the second lens L2 is convex along the circumference, and the image-side surface S4 of the second lens L2 is convex along the circumference. The object-side surface S5 of the third lens L3 is convex along the optical axis, and the image-side surface S6 of the third lens L3 is concave along the optical axis; the object-side surface S5 of the third lens L3 is convex along the circumference, and the image-side surface S6 of the third lens L3 is concave along the circumference. The object-side surface S7 of the fourth lens element L4 is convex along the optical axis, and the image-side surface S8 of the fourth lens element L4 is convex along the optical axis. The object-side surface S7 of the fourth lens element L4 is convex along the circumference, and the image-side surface S8 of the fourth lens element L4 is convex along the circumference. The object-side surface S9 of the fifth lens element L5 is concave along the optical axis, and the image-side surface S10 of the fifth lens element L5 is convex along the optical axis. The object-side surface S9 of the fifth lens element L5 is concave along the circumference, and the image-side surface S10 of the fifth lens element L5 is convex along the circumference.

[0167] The object-side surfaces and image-side surfaces of the first lens L1 , the second lens L2 , and the fifth lens L5 are all spherical surfaces, and the object-side surfaces and image-side surfaces of the third lens L3 and the fourth lens L4 are all aspherical surfaces.

[0168] In addition, the first lens L1 , the second lens L2 , the fourth lens L4 , the fifth lens L5 , the infrared filter L6 , and the protective glass L7 are all made of glass, and the third lens L3 is made of plastic.

[0169] In the second embodiment, the effective focal length f of the imaging module 100 is 4.62 mm, the aperture value FNO is 1.81, and the maximum field of view FOV is 80.17 degrees.

[0170] In addition, the parameters of the imaging module 100 are given in Table 3 and Table 4, and the definitions of the parameters can be deduced from the first embodiment and are not repeated here.

[0171] Table 3

[0172]

[0173]

[0174] Table 4

[0175]

[0176] Based on the above parameter information, the following data can be derived:

[0177]

[0178] Third embodiment

[0179] like Figure 5 In the third embodiment shown, the imaging module 100 includes, from the object side to the image side, a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, a third lens L3 with positive refractive power, an aperture ST0, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, an infrared filter L6 and a protective glass L7. Figure 6 1 is a spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%) of the imaging module 100 in the third embodiment, wherein the astigmatism diagram and the distortion diagram are data diagrams at a reference wavelength.

[0180] The object-side surface S1 of the first lens L1 is convex along the optical axis, and the image-side surface S2 of the first lens L1 is concave along the optical axis; the object-side surface S1 of the first lens L1 is convex along the circumference, and the image-side surface S2 of the first lens L1 is concave along the circumference. The object-side surface S3 of the second lens L2 is convex along the optical axis, and the image-side surface S4 of the second lens L2 is concave along the optical axis; the object-side surface S3 of the second lens L2 is convex along the circumference, and the image-side surface S4 of the second lens L2 is concave along the circumference. The object-side surface S5 of the third lens L3 is concave along the optical axis, and the image-side surface S6 of the third lens L3 is convex along the optical axis; the object-side surface S5 of the third lens L3 is concave along the circumference, and the image-side surface S6 of the third lens L3 is convex along the circumference. The object-side surface S7 of the fourth lens element L4 is convex along the optical axis, and the image-side surface S8 of the fourth lens element L4 is convex along the optical axis. The object-side surface S7 of the fourth lens element L4 is convex along the circumference, and the image-side surface S8 of the fourth lens element L4 is convex along the circumference. The object-side surface S9 of the fifth lens element L5 is concave along the optical axis, and the image-side surface S10 of the fifth lens element L5 is convex along the optical axis. The object-side surface S9 of the fifth lens element L5 is concave along the circumference, and the image-side surface S10 of the fifth lens element L5 is convex along the circumference.

[0181] The object-side surface and the image-side surface of the first lens L1 are both spherical surfaces, and the object-side surfaces and the image-side surfaces of the second lens L2, the third lens L3, the fourth lens L4 and the fifth lens L5 are all aspherical surfaces.

[0182] In addition, the first lens L1, the fourth lens L4, the infrared filter L6 and the protective glass L7 are all made of glass, and the second lens L2, the third lens L3 and the fifth lens L5 are made of plastic.

[0183] In the third embodiment, the effective focal length f of the imaging module 100 is 4.55 mm, the aperture value FNO is 1.80, and the maximum field of view FOV is 81.21 degrees.

[0184] In addition, the parameters of the imaging module 100 are given in Table 5 and Table 6, and the definitions of the parameters can be deduced from the first embodiment and are not repeated here.

[0185] It should also be noted that in this embodiment, the image-side surface S6 of the third lens element L3 can function as an aperture stop. The sum of the "thickness" parameter values ​​corresponding to surface numbers 6 and 7 is the distance on the optical axis from the image-side surface S6 of the third lens element L3 to the object-side surface S7 of the fourth lens element L4.

[0186] Table 5

[0187]

[0188]

[0189] Table 6

[0190]

[0191] Based on the above parameter information, the following data can be derived:

[0192]

[0193] Fourth embodiment

[0194] like Figure 7 In the fourth embodiment shown, the imaging module 100 includes, from the object side to the image side, a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, an aperture stop ST0, a third lens L3 with positive refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, an infrared filter L6, and a cover glass L7. The fourth lens L4 and the fifth lens L5 form a cemented lens. Figure 8 1 and 2 are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the imaging module 100 in the fourth embodiment, wherein the astigmatism diagram and distortion diagram are data diagrams at a reference wavelength.

[0195] The object-side surface S1 of the first lens L1 is convex along the optical axis, and the image-side surface S2 of the first lens L1 is concave along the optical axis; the object-side surface S1 of the first lens L1 is convex along the circumference, and the image-side surface S2 of the first lens L1 is concave along the circumference. The object-side surface S3 of the second lens L2 is convex along the optical axis, and the image-side surface S4 of the second lens L2 is convex along the optical axis; the object-side surface S3 of the second lens L2 is convex along the circumference, and the image-side surface S4 of the second lens L2 is convex along the circumference. The object-side surface S5 of the third lens L3 is concave along the optical axis, and the image-side surface S6 of the third lens L3 is convex along the optical axis; the object-side surface S5 of the third lens L3 is concave along the circumference, and the image-side surface S6 of the third lens L3 is convex along the circumference. The object-side surface S7 of the fourth lens element L4 is convex along the optical axis, and the image-side surface S8 of the fourth lens element L4 is convex along the optical axis. The object-side surface S7 of the fourth lens element L4 is convex along the circumference, and the image-side surface S8 of the fourth lens element L4 is convex along the circumference. The object-side surface S9 of the fifth lens element L5 is concave along the optical axis, and the image-side surface S10 of the fifth lens element L5 is convex along the optical axis. The object-side surface S9 of the fifth lens element L5 is concave along the circumference, and the image-side surface S10 of the fifth lens element L5 is convex along the circumference.

[0196] The object-side surfaces and image-side surfaces of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , and the fifth lens L5 are all spherical surfaces.

[0197] In addition, the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the infrared filter L6 , and the protective glass L7 are all made of glass.

[0198] In addition, the fourth lens L4 and the fifth lens L5 are cemented lenses, thereby reducing the thickness difference and material property difference between the two lenses on the optical axis and lowering the risk of cracking of the cemented lens.

[0199] In the fourth embodiment, the effective focal length f of the imaging module 100 is 4.64 mm, the aperture value FNO is 1.80, and the maximum field of view FOV is 80.69 degrees.

[0200] In addition, the parameters of the imaging module 100 are given in Table 7, and the definitions of the parameters therein can be derived from the first embodiment and are not repeated here. However, it should be noted that the fourth lens L4 and the fifth lens L5 are bonded together. In this case, the radius of curvature of the image side surface S8 of the fourth lens L4 at the optical axis is the same as the radius of curvature of the object side surface S9 of the fifth lens L5 at the optical axis. Therefore, the parameters of the image side surface S8 of the fourth lens L4 are not reflected in the table below. At the same time, since the object side surface and the image side surface of each lens are spherical, when the radius of curvature of any point on the object side surface or the image side surface of a given lens is determined, the radius of curvature of each point on the surface is also determined. Therefore, to avoid repetition, this embodiment does not provide a table of aspheric coefficient parameters.

[0201] Table 7

[0202]

[0203] Based on the above parameter information, the following data can be derived:

[0204]

[0205]

[0206] Fifth embodiment

[0207] like Figure 9 In the fifth embodiment, the imaging module 100 includes, from the object side to the image side, a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, an aperture stop ST0, a third lens L3 with positive refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, an infrared filter L6, and a cover glass L7. The fourth lens L4 and the fifth lens L5 form a cemented lens. Figure 10 1 and 2 are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the imaging module 100 in the fifth embodiment, wherein the astigmatism diagram and distortion diagram are data diagrams at a reference wavelength.

[0208] The object-side surface S1 of the first lens L1 is convex along the optical axis, and the image-side surface S2 of the first lens L1 is concave along the optical axis; the object-side surface S1 of the first lens L1 is convex along the circumference, and the image-side surface S2 of the first lens L1 is concave along the circumference. The object-side surface S3 of the second lens L2 is convex along the optical axis, and the image-side surface S4 of the second lens L2 is convex along the optical axis; the object-side surface S3 of the second lens L2 is convex along the circumference, and the image-side surface S4 of the second lens L2 is convex along the circumference. The object-side surface S5 of the third lens L3 is concave along the optical axis, and the image-side surface S6 of the third lens L3 is convex along the optical axis; the object-side surface S5 of the third lens L3 is concave along the circumference, and the image-side surface S6 of the third lens L3 is convex along the circumference. The object-side surface S7 of the fourth lens element L4 is convex along the optical axis, and the image-side surface S8 of the fourth lens element L4 is convex along the optical axis. The object-side surface S7 of the fourth lens element L4 is convex along the circumference, and the image-side surface S8 of the fourth lens element L4 is convex along the circumference. The object-side surface S9 of the fifth lens element L5 is concave along the optical axis, and the image-side surface S10 of the fifth lens element L5 is convex along the optical axis. The object-side surface S9 of the fifth lens element L5 is concave along the circumference, and the image-side surface S10 of the fifth lens element L5 is convex along the circumference.

[0209] The object-side surfaces and image-side surfaces of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , and the fifth lens L5 are all spherical surfaces.

[0210] In addition, the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the infrared filter L6 , and the protective glass L7 are all made of glass.

[0211] In the fifth embodiment, the effective focal length f of the imaging module 100 is 4.62 mm, the aperture value FNO is 1.80, and the maximum field of view FOV is 80.20 degrees.

[0212] In addition, the parameters of the imaging module 100 are given in Table 8, and the definitions of the parameters therein can be derived from the first embodiment and are not repeated here. However, it should be noted that the fourth lens L4 and the fifth lens L5 are bonded together. In this case, the radius of curvature of the image side surface S8 of the fourth lens L4 at the optical axis is the same as the radius of curvature of the object side surface S9 of the fifth lens L5 at the optical axis. Therefore, the parameters of the image side surface S8 of the fourth lens L4 are not reflected in the table below. At the same time, since the object side surface and the image side surface of each lens are spherical, when the radius of curvature of any point on the object side surface or the image side surface of a given lens is determined, the radius of curvature of each point on the surface is also determined. Therefore, to avoid repetition, this embodiment does not provide a table of aspheric coefficient parameters.

[0213] Table 8

[0214]

[0215]

[0216] Based on the above parameter information, the following data can be derived:

[0217]

[0218] Sixth embodiment

[0219] like Figure 11 In the sixth embodiment, the imaging module 100 includes, from the object side to the image side, a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, an aperture stop ST0, a third lens L3 with positive refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, an infrared filter L6, and a cover glass L7. The fourth lens L4 and the fifth lens L5 form a cemented lens. Figure 12 1 and 2 are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the imaging module 100 in the sixth embodiment, wherein the astigmatism diagram and distortion diagram are data diagrams at a reference wavelength.

[0220] The object-side surface S1 of the first lens L1 is convex along the optical axis, and the image-side surface S2 of the first lens L1 is concave along the optical axis; the object-side surface S1 of the first lens L1 is convex along the circumference, and the image-side surface S2 of the first lens L1 is concave along the circumference. The object-side surface S3 of the second lens L2 is convex along the optical axis, and the image-side surface S4 of the second lens L2 is convex along the optical axis; the object-side surface S3 of the second lens L2 is convex along the circumference, and the image-side surface S4 of the second lens L2 is convex along the circumference. The object-side surface S5 of the third lens L3 is concave along the optical axis, and the image-side surface S6 of the third lens L3 is convex along the optical axis; the object-side surface S5 of the third lens L3 is concave along the circumference, and the image-side surface S6 of the third lens L3 is convex along the circumference. The object-side surface S7 of the fourth lens element L4 is convex along the optical axis, and the image-side surface S8 of the fourth lens element L4 is convex along the optical axis. The object-side surface S7 of the fourth lens element L4 is convex along the circumference, and the image-side surface S8 of the fourth lens element L4 is convex along the circumference. The object-side surface S9 of the fifth lens element L5 is concave along the optical axis, and the image-side surface S10 of the fifth lens element L5 is convex along the optical axis. The object-side surface S9 of the fifth lens element L5 is concave along the circumference, and the image-side surface S10 of the fifth lens element L5 is convex along the circumference.

[0221] The object-side surfaces and image-side surfaces of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , and the fifth lens L5 are all spherical surfaces.

[0222] In addition, the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the infrared filter L6 , and the protective glass L7 are all made of glass.

[0223] In the sixth embodiment, the effective focal length f of the imaging module 100 is 4.62 mm, the aperture value FNO is 1.80, and the maximum field of view FOV is 81.07 degrees.

[0224] In addition, the various parameters of the imaging module 100 are given in Table 9, and the definitions of the various parameters therein can be deduced from the first embodiment and are not repeated here. However, it should be noted that the fourth lens L4 and the fifth lens L5 are bonded together. In this case, the radius of curvature of the image side surface S8 of the fourth lens L4 at the optical axis is the same as the radius of curvature of the object side surface S9 of the fifth lens L5 at the optical axis. Therefore, the parameters of the image side surface S8 of the fourth lens L4 are not reflected in the table below. At the same time, since the object side surface and the image side surface of each lens are spherical, when the radius of curvature of any point on the object side surface or the image side surface of a given lens is determined, the radius of curvature of each point on the surface is also determined. Therefore, to avoid repetition, this embodiment does not provide a table of aspheric coefficient parameters.

[0225] Table 9

[0226]

[0227] Based on the above parameter information, the following data can be derived:

[0228]

[0229] Seventh embodiment

[0230] like Figure 13 In the seventh embodiment, the imaging module 100 includes, from the object side to the image side, a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, an aperture stop ST0, a third lens L3 with positive refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, an infrared filter L6, and a cover glass L7. The fourth lens L4 and the fifth lens L5 form a cemented lens. Figure 14 1 is a spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%) of the imaging module 100 in the seventh embodiment, wherein the astigmatism diagram and the distortion diagram are data diagrams at a reference wavelength.

[0231] The object-side surface S1 of the first lens L1 is convex along the optical axis, and the image-side surface S2 of the first lens L1 is concave along the optical axis; the object-side surface S1 of the first lens L1 is convex along the circumference, and the image-side surface S2 of the first lens L1 is concave along the circumference. The object-side surface S3 of the second lens L2 is convex along the optical axis, and the image-side surface S4 of the second lens L2 is convex along the optical axis; the object-side surface S3 of the second lens L2 is convex along the circumference, and the image-side surface S4 of the second lens L2 is convex along the circumference. The object-side surface S5 of the third lens L3 is concave along the optical axis, and the image-side surface S6 of the third lens L3 is convex along the optical axis; the object-side surface S5 of the third lens L3 is concave along the circumference, and the image-side surface S6 of the third lens L3 is convex along the circumference. The object-side surface S7 of the fourth lens element L4 is convex along the optical axis, and the image-side surface S8 of the fourth lens element L4 is convex along the optical axis. The object-side surface S7 of the fourth lens element L4 is convex along the circumference, and the image-side surface S8 of the fourth lens element L4 is convex along the circumference. The object-side surface S9 of the fifth lens element L5 is concave along the optical axis, and the image-side surface S10 of the fifth lens element L5 is convex along the optical axis. The object-side surface S9 of the fifth lens element L5 is concave along the circumference, and the image-side surface S10 of the fifth lens element L5 is convex along the circumference.

[0232] The object-side surfaces and image-side surfaces of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , and the fifth lens L5 are all spherical surfaces.

[0233] In addition, the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the infrared filter L6 , and the protective glass L7 are all made of glass.

[0234] In the seventh embodiment, the effective focal length f of the imaging module 100 is 3.57 mm, the aperture value FNO is 1.80, and the maximum field of view FOV is 100.26 degrees.

[0235] In addition, the various parameters of the imaging module 100 are given in Table 10, and the definitions of the various parameters therein can be deduced from the first embodiment and are not repeated here. However, it should be noted that the fourth lens L4 and the fifth lens L5 are bonded together. In this case, the radius of curvature of the image side surface S8 of the fourth lens L4 at the optical axis is the same as the radius of curvature of the object side surface S9 of the fifth lens L5 at the optical axis. Therefore, the parameters of the image side surface S8 of the fourth lens L4 are not reflected in the table below. At the same time, since the object side surface and image side surface of each lens are spherical, when the radius of curvature of any point on the object side surface or image side surface of a given lens is determined, the radius of curvature of each point on the surface is also determined. Therefore, to avoid repetition, this embodiment does not provide a table of aspheric coefficient parameters.

[0236] Table 10

[0237]

[0238] Based on the above parameter information, the following data can be derived:

[0239]

[0240]

[0241] Eighth embodiment

[0242] like Figure 15 In the eighth embodiment, the imaging module 100 includes, from the object side to the image side, a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, an aperture stop ST0, a third lens L3 with positive refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, an infrared filter L6, and a cover glass L7. The fourth lens L4 and the fifth lens L5 form a cemented lens. Figure 16 1 and 2 are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the imaging module 100 in the eighth embodiment, wherein the astigmatism diagram and distortion diagram are data diagrams at a reference wavelength.

[0243] The object-side surface S1 of the first lens L1 is convex along the optical axis, and the image-side surface S2 of the first lens L1 is concave along the optical axis; the object-side surface S1 of the first lens L1 is convex along the circumference, and the image-side surface S2 of the first lens L1 is concave along the circumference. The object-side surface S3 of the second lens L2 is convex along the optical axis, and the image-side surface S4 of the second lens L2 is convex along the optical axis; the object-side surface S3 of the second lens L2 is convex along the circumference, and the image-side surface S4 of the second lens L2 is convex along the circumference. The object-side surface S5 of the third lens L3 is concave along the optical axis, and the image-side surface S6 of the third lens L3 is convex along the optical axis; the object-side surface S5 of the third lens L3 is concave along the circumference, and the image-side surface S6 of the third lens L3 is convex along the circumference. The object-side surface S7 of the fourth lens element L4 is convex along the optical axis, and the image-side surface S8 of the fourth lens element L4 is convex along the optical axis. The object-side surface S7 of the fourth lens element L4 is convex along the circumference, and the image-side surface S8 of the fourth lens element L4 is convex along the circumference. The object-side surface S9 of the fifth lens element L5 is concave along the optical axis, and the image-side surface S10 of the fifth lens element L5 is convex along the optical axis. The object-side surface S9 of the fifth lens element L5 is concave along the circumference, and the image-side surface S10 of the fifth lens element L5 is convex along the circumference.

[0244] The object-side surfaces and image-side surfaces of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , and the fifth lens L5 are all spherical surfaces.

[0245] In addition, the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the infrared filter L6 , and the protective glass L7 are all made of glass.

[0246] In the eighth embodiment, the effective focal length f of the imaging module 100 is 4.00 mm, the aperture value FNO is 1.80, and the maximum field of view FOV is 90.29 degrees.

[0247] In addition, the various parameters of the imaging module 100 are given in Table 11, and the definitions of the various parameters therein can be derived from the first embodiment and are not repeated here. However, it should be noted that the fourth lens L4 and the fifth lens L5 are bonded together. In this case, the radius of curvature of the image side surface S8 of the fourth lens L4 at the optical axis is the same as the radius of curvature of the object side surface S9 of the fifth lens L5 at the optical axis. Therefore, the parameters of the image side surface S8 of the fourth lens L4 are not reflected in the table below. At the same time, since the object side surface and the image side surface of each lens are spherical, when the radius of curvature of any point on the object side surface or the image side surface of a given lens is determined, the radius of curvature of each point on the surface is also determined. Therefore, to avoid repetition, this embodiment does not provide a table of aspheric coefficient parameters.

[0248] Table 11

[0249]

[0250]

[0251] Based on the above parameter information, the following data can be derived:

[0252]

[0253] Ninth embodiment

[0254] like Figure 17 In the ninth embodiment, the imaging module 100 includes, from the object side to the image side, a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, an aperture stop ST0, a third lens L3 with positive refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, an infrared filter L6, and a cover glass L7. The fourth lens L4 and the fifth lens L5 form a cemented lens. Figure 18 1 is a spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%) of the imaging module 100 in the ninth embodiment, wherein the astigmatism diagram and the distortion diagram are data diagrams at a reference wavelength.

[0255] The object-side surface S1 of the first lens L1 is convex along the optical axis, and the image-side surface S2 of the first lens L1 is concave along the optical axis; the object-side surface S1 of the first lens L1 is convex along the circumference, and the image-side surface S2 of the first lens L1 is concave along the circumference. The object-side surface S3 of the second lens L2 is convex along the optical axis, and the image-side surface S4 of the second lens L2 is concave along the optical axis; the object-side surface S3 of the second lens L2 is convex along the circumference, and the image-side surface S4 of the second lens L2 is concave along the circumference. The object-side surface S5 of the third lens L3 is concave along the optical axis, and the image-side surface S6 of the third lens L3 is convex along the optical axis; the object-side surface S5 of the third lens L3 is concave along the circumference, and the image-side surface S6 of the third lens L3 is convex along the circumference. The object-side surface S7 of the fourth lens element L4 is convex along the optical axis, and the image-side surface S8 of the fourth lens element L4 is convex along the optical axis. The object-side surface S7 of the fourth lens element L4 is convex along the circumference, and the image-side surface S8 of the fourth lens element L4 is convex along the circumference. The object-side surface S9 of the fifth lens element L5 is concave along the optical axis, and the image-side surface S10 of the fifth lens element L5 is convex along the optical axis. The object-side surface S9 of the fifth lens element L5 is concave along the circumference, and the image-side surface S10 of the fifth lens element L5 is convex along the circumference.

[0256] The object-side surfaces and image-side surfaces of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , and the fifth lens L5 are all spherical surfaces.

[0257] In addition, the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the infrared filter L6 , and the protective glass L7 are all made of glass.

[0258] In the ninth embodiment, the effective focal length f of the imaging module 100 is 4.25 mm, the aperture value FNO is 2.00, and the maximum field of view FOV is 98.74 degrees.

[0259] In addition, the various parameters of the imaging module 100 are given in Table 12, and the definitions of the various parameters therein can be derived from the first embodiment and are not repeated here. However, it should be noted that the fourth lens L4 and the fifth lens L5 are bonded together. In this case, the radius of curvature of the image side surface S8 of the fourth lens L4 at the optical axis is the same as the radius of curvature of the object side surface S9 of the fifth lens L5 at the optical axis. Therefore, the parameters of the image side surface S8 of the fourth lens L4 are not reflected in the table below. At the same time, since the object side surface and the image side surface of each lens are spherical, when the radius of curvature of any point on the object side surface or the image side surface of a given lens is determined, the radius of curvature of each point on the surface is also determined. Therefore, to avoid repetition, this embodiment does not provide a table of aspheric coefficient parameters.

[0260] Table 12

[0261]

[0262] Based on the above parameter information, the following data can be derived:

[0263]

[0264] refer to Figure 19 As shown, in some embodiments, the imaging module 100 is provided with a photosensitive chip 110, and the photosensitive chip 110 is disposed on the image side of the protective glass L7. In some embodiments, the photosensitive chip 110 can be a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor).

[0265] Specifically, in some embodiments, the imaging module 100 is a fixed focus module. In other embodiments, a voice coil motor is configured on the photosensitive chip 110 so that the photosensitive chip 110 can move relative to the lens in the imaging module 100, thereby achieving a focusing function. In one embodiment, the protective glass L7 can be fixed integrally with the photosensitive chip 110 so that the two can remain relatively stationary during the focusing movement. In other embodiments, a fixing member can also be provided to fix the first lens L1, the second lens L2, the third lens L3, the aperture ST0, the fourth lens L4 and the fifth lens L5, and a voice coil motor can be configured on the fixing member to drive the above-mentioned lenses and the aperture ST0 to move relative to the photosensitive chip 110, thereby achieving a focusing function.

[0266] In practical applications, the photosensitive chip 110 is connected to the circuit board. The photosensitive chip 110 converts the received image into an electrical signal and transmits it to the image processor through the circuit board for processing and optimization. Specifically, the imaging module 100 can be used in mobile phones, vehicles, monitoring, security, medical and other fields.

[0267] refer to Figure 20 As shown, in some embodiments, the imaging module 100 can be communicatively connected with the display module 310 to cooperate to form an electronic device 30 with imaging and display functions. Specifically, the display module 310 includes a display screen 3111. The light carrying the environmental scene information is modulated by each lens of the imaging module 100 and received by the photosensitive chip 110. The photosensitive chip 110 converts the light signal into an electrical signal and transmits it to the display module 310 through the circuit, and finally displays it on the display screen 3111. At this time, with the help of the wide viewing angle characteristic of the imaging module 100, the electronic device 30 can obtain the scene within the wide viewing angle range of the object side of the lens (imaging module 100) and display it on the display screen 3111. Similarly, the electronic device 30 can also be used in mobile phones, vehicles, monitoring, security, medical and other fields.

[0268] refer to Figure 21 As shown, in some embodiments, the imaging module 100 can be used as a vehicle-mounted camera in a car 40. The car 40 can be an autonomous car or a non-autonomous car. The imaging module 100 can be used as a front-view camera, a rear-view camera, or a side-view camera of the car 40. Specifically, the car 40 includes a car body 410, and the imaging module 100 is installed at any position of the car body 410, such as the left rearview mirror, the right rearview mirror, the rear trunk, the front headlights, the rear headlights, etc., to obtain image information of the blind spots of the car 40 (such as obtaining a larger left rear and right rear field of view). In addition, a display module 310 is also provided in the car 40, and the display module 310 is installed in the car body 410, and the imaging module 100 is communicatively connected to the display module 310. The image information obtained by the imaging module 100 can be transmitted to the display module 310 for display, so that the driver can obtain more complete surrounding image information and improve safety during driving.

[0269] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0270] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. An imaging module, characterized in that: There are five refractive lenses, from object side to image side, including: a first lens having negative refractive power, wherein the object-side surface of the first lens is convex; a second lens having positive refractive power, wherein the object-side surface of the second lens is convex; a third lens having refractive power; a fourth lens element having positive refractive power, wherein both the object-side surface and the image-side surface of the fourth lens element are convex; and a fifth lens having negative refractive power, wherein the object-side surface of the fifth lens is concave and the image-side surface of the fifth lens is convex; A photosensitive chip, the photosensitive chip being arranged on the image side of the fifth lens; The imaging module satisfies the following relationship: 3.14≤TL / Imgh≤3.50; 1.00<|R5| / |R6|<2.00; Among them, TL is the distance from the object side of the first lens to the imaging surface of the imaging module on the optical axis, Imgh is the diagonal length of the photosensitive area in the photosensitive chip, R5 is the curvature radius of the object side of the third lens at the optical axis, and R6 is the curvature radius of the image side of the third lens at the optical axis.

2. The imaging module according to claim 1, wherein: The optical system further includes an aperture, which is disposed between the object side of the first lens and the fourth lens.

3. The imaging module according to claim 1, wherein: The following relationship is satisfied: -7.00<f1 / f<0; Wherein, f1 is the focal length of the first lens, and f is the effective focal length of the imaging module.

4. The imaging module according to claim 1, wherein: The following relationship is satisfied: f45 / f>1.50; Among them, f45 is the combined focal length of the fourth lens and the fifth lens, and f is the effective focal length of the imaging module.

5. The imaging module according to claim 1, wherein: The following relationship is satisfied: 1.00≤CT2 / CT3<5.00; Wherein, CT2 is the thickness of the second lens on the optical axis, and CT3 is the thickness of the third lens on the optical axis.

6. The imaging module according to claim 1, wherein: The following relationship is satisfied: ΣCT / TL<0.70; Wherein, ΣCT is the sum of the thicknesses of the first lens, the second lens, the third lens, the fourth lens and the fifth lens on the optical axis, and TL is the distance from the object side surface of the first lens to the imaging surface of the imaging module on the optical axis.

7. The imaging module according to claim 1, wherein: The following relationship is satisfied: ET4≥0.47; ET4 is the lens thickness of the fourth lens corresponding to a radius of 3.3 mm in a direction perpendicular to the optical axis, and the unit of ET4 is mm.

8. The imaging module according to claim 1, wherein: The following relationship is satisfied: |R3| / |R4|≤5.00; Wherein, R3 is the curvature radius of the object side surface of the second lens at the optical axis, and R4 is the curvature radius of the image side surface of the second lens at the optical axis.

9. The imaging module according to claim 1, wherein: The following relationship is satisfied: 0≤|V2-V5|<35.00; Wherein, V2 is the dispersion coefficient of the second lens, and V5 is the dispersion coefficient of the fifth lens.

10. The imaging module according to claim 1, wherein: The following relationship is satisfied: (CT4-CT5) / (α4-α5)<0; Wherein, CT4 is the thickness of the fourth lens on the optical axis, CT5 is the thickness of the fifth lens on the optical axis, α4 is the thermal expansion coefficient of the fourth lens, and α5 is the thermal expansion coefficient of the fifth lens.

11. The imaging module according to claim 1, wherein: The following relationship is satisfied: f / EPD≤2.00; Wherein, f is the effective focal length of the imaging module, and EPD is the entrance pupil diameter of the imaging module.

12. The imaging module according to claim 1, wherein: The imaging module satisfies the following relationship: tan[(1 / 2)FOV] / Y>0.25; Among them, FOV is the field of view of the imaging module, Y is half of the diagonal length of the photosensitive area in the photosensitive chip, and the unit of Y is mm.

13. An electronic device, characterized in that: It comprises a display module and the imaging module according to any one of claims 1 to 12, wherein the imaging module is communicatively connected to the display module, and the image obtained by the imaging module can be displayed on the display module.

14. An automobile, characterized in that: It includes a vehicle body and the electronic device according to claim 13, the display module is arranged in the vehicle body, the imaging module is arranged on the left side and / or right side of the vehicle body, the imaging module is communicatively connected to the display module, the imaging module is used to collect image information from the side and rear of the car, and the image information obtained by the imaging module can be displayed on the display module.

Images