Optical lens, camera module and electronic device

Abstract

An optical lens includes a lens barrel, a lens, a spacer element, and a holding element. The spacer element has a paraxial surface, an off-axis surface, and a first surface and a second surface disposed opposite each other. The paraxial surface is connected to the first and second surfaces on the side closest to the optical axis and tapers towards the optical axis to form a light-passing aperture. The off-axis surface is connected to the first and second surfaces on the side away from the optical axis. The holding element is fixedly disposed to the lens barrel to maintain a relatively fixed position between the lens and the lens barrel on the optical axis. The spacer element is disposed between the lens and the holding element. The lens has a first region surrounding the optical axis, and the first region is supported on the first surface in a direction parallel to the optical axis. The holding element has a second region surrounding the optical axis, and the second region is supported on the second surface in a direction parallel to the optical axis.

Description

Technical Field

[0001] This invention relates to an optical lens, a camera module, and an electronic device, particularly an optical lens and camera module suitable for electronic devices. Prior Technology

[0002] With advancements in semiconductor manufacturing technology, the performance of electronic image sensors has improved, allowing for smaller pixel sizes. Therefore, high-quality optical lenses have become an indispensable component. Furthermore, with rapid technological advancements, mobile devices equipped with optical lenses are finding increasingly wider applications, leading to more diverse requirements for these lenses.

[0003] With increasing demands for image capture, optical lenses are facing increasingly stringent environmental requirements. When the lens within an optical lens deforms due to environmental changes, the resulting stress can affect optical quality. Therefore, improving the structure of internal components to reduce the impact of environmental changes on image quality and meet the high-specification requirements of today's electronic devices has become a crucial issue in the field. Summary of the Invention

[0004] In view of the above-mentioned problems, the present invention provides an optical lens, a camera module and an electronic device that helps to controllably change the distance between the lens and the maintaining element when the lens is deformed due to environmental changes, thereby avoiding stress affecting optical quality.

[0005] This invention provides an optical lens having an optical axis. The optical lens includes a lens barrel, a lens, a spacer element, and a holding element. The optical axis passes through the lens barrel. The lens is disposed along the optical axis in the lens barrel and has a first region surrounding the optical axis. The spacer element is disposed adjacent to the lens and surrounds the optical axis, and has a first surface, a second surface, a paraxial surface, and an off-axis surface. The first region of the lens is supported on the first surface in a direction parallel to the optical axis. The second surface is disposed opposite to the first surface. The paraxial surface connects the side of the first surface near the optical axis and the side of the second surface near the optical axis, and the paraxial surface surrounds the optical axis and tapers in a direction toward the optical axis to form a light-passing aperture. The off-axis surface connects the side of the first surface away from the optical axis and the side of the second surface away from the optical axis. The holding element and the lens barrel are fixedly disposed to each other to maintain a relatively fixed position between the lens and the lens barrel on the optical axis. The spacer element is disposed between the lens and the holding element. The sustaining element has a second region surrounding the optical axis, and the second region is supported on a second surface in a direction parallel to the optical axis. The first region and the second region do not overlap in the direction parallel to the optical axis.

[0006] The present invention also provides an optical lens having an optical axis. The optical lens includes a lens barrel, a lens, a spacer element, and a holding element. The optical axis passes through the lens barrel, and the lens barrel has a first annular surface surrounding the optical axis. The lens is disposed along the optical axis on the first annular surface of the lens barrel, and the lens has a first region surrounding the optical axis. The spacer element is disposed adjacent to the lens and surrounds the optical axis, and the spacer element has a first surface, a second surface, a paraxial surface, and an off-axis surface. The first region of the lens is supported on the first surface in a direction parallel to the optical axis. The second surface is disposed opposite to the first surface. The paraxial surface connects the side of the first surface near the optical axis and the side of the second surface near the optical axis, and the paraxial surface surrounds the optical axis and tapers in a direction toward the optical axis to form a light-passing aperture. The off-axis surface connects the side of the first surface away from the optical axis and the side of the second surface away from the optical axis. The holding element and the lens barrel are fixedly disposed to each other to maintain a relatively fixed position between the lens and the lens barrel on the optical axis. The spacer element is disposed between the lens and the holding element. The sustaining element has a second annular surface surrounding an optical axis and a second region, the second region being supported on a second surface in a direction parallel to the optical axis. A gap is formed between the off-axis surface and at least one of the first and second annular surfaces, and the gap extends from the off-axis surface along at least one of the first and second surfaces toward the optical axis. The first and / or second annular surfaces forming the gap with the off-axis surface face the off-axis surface. The gap overlaps with one of the first and second regions in a direction parallel to the optical axis.

[0007] The present invention provides a camera module comprising the aforementioned optical lens and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the optical lens.

[0008] The present invention provides an electronic device comprising the aforementioned camera module.

[0009] According to the optical lens, camera module and electronic device disclosed in this invention, by means of the corresponding arrangement of the spacer element, lens barrel, lens and holding element, the distance between the lens and the holding element can be controlled to change when the lens deforms due to environmental changes, thereby avoiding stress affecting optical quality.

[0010] The above description of the content of this invention and the following description of the embodiments are used to demonstrate and explain the principles of this invention, and to provide a further explanation of the scope of the patent application of this invention. Simple Explanation of the Diagram

[0011] Figure 1 shows a cross-sectional schematic diagram of an optical lens according to a first embodiment of the present invention. Figure 2 shows an enlarged schematic diagram of region EL2 in Figure 1. Figure 3 shows an exploded view of the optical lens in Figure 1. Figure 4 shows a cross-sectional schematic diagram of the optical lens in Figure 1. Figure 5 shows an enlarged schematic diagram of region EL5 in Figure 4. Figure 6 shows a planar schematic diagram of the spacer element of an optical lens according to a first embodiment of the present invention. Figure 7 shows a cross-sectional schematic diagram of an optical lens according to a second embodiment of the present invention. Figure 8 shows an enlarged schematic diagram of region EL8 in Figure 7. Figure 9 shows an exploded view of the optical lens in Figure 7. Figure 10 shows a cross-sectional view of the optical lens in Figure 7. Figure 11 shows an enlarged schematic diagram of region EL11 in Figure 10. Figure 12 shows a plan view of the spacer element of an optical lens according to a second embodiment of the present invention. Figure 13 shows a cross-sectional schematic diagram of an optical lens according to a third embodiment of the present invention. Figure 14 shows an enlarged schematic diagram of region EL14 in Figure 13. Figure 15 shows an exploded view of the optical lens in Figure 13. Figure 16 shows a cross-sectional schematic diagram of the optical lens in Figure 13. Figure 17 shows an enlarged schematic diagram of region EL17 in Figure 16. Figure 18 shows a plan view of the spacer element of an optical lens according to a third embodiment of the present invention. Figure 19 shows a cross-sectional schematic diagram of an optical lens according to a fourth embodiment of the present invention. Figure 20 shows an enlarged schematic diagram of region EL20 in Figure 19. Figure 21 shows an exploded view of the optical lens in Figure 19. Figure 22 shows a cross-sectional schematic diagram of the optical lens in Figure 19. Figure 23 shows an enlarged schematic diagram of region EL23 in Figure 22. Figure 24 shows a planar schematic diagram of the spacer element of an optical lens according to a fourth embodiment of the present invention. Figure 25 shows a plan view of the spacer element of an optical lens according to an embodiment of the present invention. Figure 26 illustrates a plan view of the spacer element of an optical lens according to another embodiment of the present invention. Figure 27 illustrates a perspective view of one side of an electronic device according to a fifth embodiment of the present invention. Figure 28 shows a three-dimensional schematic diagram of the other side of the electronic device in Figure 27. Figure 29 illustrates a schematic diagram of images captured by an ultra-wide-angle camera module. Figure 30 illustrates a schematic diagram of images captured by a high-resolution camera module. Figure 31 illustrates a schematic diagram of images captured by a telephoto camera module. Figure 32 illustrates a perspective view of one side of an electronic device according to a sixth embodiment of the present invention. Figure 33 illustrates a perspective view of an electronic device according to a seventh embodiment of the present invention. Figure 34 shows a side view of the electronic device in Figure 33. Figure 35 shows a top view of the electronic device in Figure 33. Figure 36 illustrates a perspective view of an electronic device according to an eighth embodiment of the present invention. Implementation

[0012] The following detailed description of the features and advantages of the present invention is sufficient to enable anyone skilled in the art to understand the technical content of the present invention and implement it accordingly. Based on the disclosure, patent claims, and drawings in this specification, anyone skilled in the art can easily understand the relevant objectives and advantages of the present invention. The following embodiments further illustrate the points of the present invention in detail, but are not intended to limit the scope of the present invention in any way.

[0013] The present invention provides an optical lens comprising a lens barrel, a lens, a spacer element, and a holding element. The optical lens has an optical axis passing through the lens barrel. The lens is disposed in the lens barrel along the optical axis and has a first region surrounding the optical axis.

[0014] A spacer element is disposed adjacent to and surrounds the optical axis of a lens, and the spacer element has a first surface, a second surface, a paraxial surface, and an off-axis surface. The second surface is disposed opposite to the first surface, and a first region of the lens is supported on the first surface in a direction parallel to the optical axis. The paraxial surface connects the side of the first surface near the optical axis and the side of the second surface near the optical axis, and the paraxial surface surrounds the optical axis and tapers in a direction toward the optical axis to form a light-passing aperture. The off-axis surface connects the side of the first surface away from the optical axis and the side of the second surface away from the optical axis. The spacer element may have a light-shielding function to prevent glare.

[0015] The maintaining element is fixedly disposed to the lens barrel to maintain the relative fixed position of the lens and the lens barrel on the optical axis. Specifically, the maintaining element is correspondingly disposed to the lens to maintain the lens's position within the lens barrel, preventing lens misalignment or detachment and ensuring stable optical imaging quality. The maintaining element can be disposed on the lens barrel by means of threaded fastening, adhesive application, or mechanical snap-fit, or it can be integrally formed with the lens barrel; this invention is not limited to these methods.

[0016] The sustaining element has a second region surrounding the optical axis, the spacer element is disposed between the lens and the sustaining element, and the second region of the sustaining element is supported on the second surface of the spacer element in a direction parallel to the optical axis.

[0017] According to the optical lens disclosed in this invention, by means of the corresponding arrangement of the spacer element, the lens barrel, the lens and the holding element, the distance between the lens and the holding element can be controlled to change when the lens deforms due to environmental changes, thereby avoiding stress affecting the optical quality.

[0018] In one embodiment, the first region of the lens and the second region of the sustaining element may not overlap in a direction parallel to the optical axis. Thus, by using a spacer element to separate the lens and the sustaining element, and ensuring that the first and second regions do not overlap in a direction parallel to the optical axis, the distance between the lens and the sustaining element can be controlled to change when the lens deforms due to environmental changes, thereby preventing stress from affecting optical quality.

[0019] In one embodiment, at least one of the lens barrel and the holding element may form a gap with the off-axis surface of the spacer element, and the gap may extend from the off-axis surface of the spacer element along at least one of the first and second surfaces toward the optical axis. This gap provides a margin for the deformability of the spacer element to prevent buckling or displacement during deformation, thereby maintaining structural stability. Specifically, the lens barrel may have a first annular surface surrounding the optical axis, and the lens may be disposed along the optical axis on the first annular surface of the lens barrel. Furthermore, the holding element may further have a second annular surface surrounding the optical axis. A gap may be formed between the off-axis surface of the spacer element and at least one of the first and second annular surfaces, and the gap may extend from the off-axis surface along at least one of the first and second surfaces toward the optical axis. The first and / or second annular surfaces forming the gap with the off-axis surface may face the off-axis surface. Therefore, the gap provides space for the spacer element to deform in directions parallel to and / or perpendicular to the optical axis; furthermore, the gap is formed on the off-axis surface, which prevents the spacer element from being subjected to lateral forces perpendicular to the optical axis during deformation, thereby preventing the spacer element from shifting and affecting optical quality. The first annular surface of the lens barrel may refer to the inner surface of the lens barrel, and the inner surface of the lens barrel may, for example, accommodate lenses and other optical elements (e.g., spacer rings, fixing rings, light shields, etc.). The second annular surface of the maintaining element may refer to the inner surface of the maintaining element, and the inner surface of the maintaining element may, for example, rest against the outer surface of the lens barrel, be assembled with the lens barrel, and / or rest against the spacer element.

[0020] The gap can overlap with either the first region or the second region in a direction parallel to the optical axis. This allows the specific spacing between the lens and the holding element to change with environmental variations, preventing pressure from affecting the optical quality of the lens and thereby improving the environmental adaptability of the optical lens.

[0021] At least one of the lens barrel and the holding element can be clearance-fitted with the spacer element in a direction perpendicular to the optical axis. This allows for the spacer element to deform during assembly, preventing interference with other elements during deformation. This clearance fit can also be called a loose fit. It should be noted that while the first region of the lens and the second region of the holding element are substantially coaxial in the mechanism, because the spacer element is assembled with the lens barrel or holding element using a clearance fit, the regions of the first and second regions surrounding the optical axis may be approximately coaxial.

[0022] The sustaining element may include a sustaining portion extending in a direction toward the optical axis, and the sustaining portion having the second region.

[0023] The retaining element may further include a barb structure, which is spaced apart from the retaining portion and is closer to the optical axis than the off-axis surface of the spacer element. The spacer element may be disposed between the barb structure and the retaining portion. This allows for pre-assembly of the spacer element via the barb structure, preventing it from detaching from the retaining element and improving the assembly process.

[0024] The barbed structure can face and be spaced apart from the lens, and can be further away from the optical axis than the lens. This creates a space between the lens and the barbed structure, preserving the deformability margin of the lens and / or spacer element, and reducing assembly interference between the lens and / or spacer element after deformation. The gap may further include the spacing between the barbed structure and the lens. For example, the gap formed between the off-axis surface of the spacer element and the lens barrel and / or holding element can extend to the space between the barbed structure and the lens.

[0025] The lens barrel, spacer element, and retaining element can be made of materials such as plastic or metal, and the present invention is not limited thereto. In embodiments where the spacer element is made of plastic, the spacer element can elastically deform when the lens deforms to adaptively reduce the stress on the lens and maintain the lens position, thereby maintaining optical quality. In embodiments where the retaining element is made of metal, the retaining part can have sufficient rigidity to prevent the lens from falling off. The metal material can be, for example, aluminum or brass, but the present invention is not limited thereto. Assembling a metal retaining element with a plastic lens barrel can further improve the axial deformation resistance of the plastic lens barrel, thereby improving the impact resistance of the optical lens.

[0026] The optical lens disclosed in this invention may include a lens group, wherein the lens group includes the aforementioned lenses, and the lens group may have at least one plastic lens and at least one glass lens. Thus, the optical lens simultaneously includes both plastic and glass lenses, which can improve optical quality and reduce the impact of the environment on the optical lens. The lenses may be made of plastic. This can correct edge imaging, thereby improving overall optical quality. The lens group is arranged along the optical axis on the first annular surface of the lens barrel; that is, all lenses in the lens group may be arranged sequentially along the optical axis, and all of these lenses may be arranged on the first annular surface of the lens barrel.

[0027] The optical lens disclosed in this invention may further include a damper, which may be disposed within the gap. This provides a buffering function and further improves the airtightness of the optical lens. Furthermore, the damper disposed within the gap also reduces the probability of misalignment of the spacer element.

[0028] The optical lens disclosed in this invention may further include a light-shielding plate surrounding the optical axis. The light-shielding plate may be disposed between the lens and the spacer element, or between the spacer element and the holding element. This reduces the risk of light leakage when the spacer element deforms, thereby ensuring optical quality.

[0029] The paraxial surface of the spacer element may have an anti-reflective surface, and the reflectivity of the anti-reflective surface is lower than that of the off-axis surface. This prevents light reflection at the paraxial surface, thereby ensuring optical quality. The anti-reflective surface can reduce reflection through special uneven structures, V-groove structures, anti-reflective coatings, or nano-coatings, but the present invention is not limited to these methods. For example, referring to Figure 23, the anti-reflective surface ARL of the paraxial surface 433 has an uneven structure.

[0030] The distance VG between the first region of the lens and the second region of the holding element in the direction perpendicular to the optical axis satisfies the following condition: 0.01 mm ≤ VG ≤ 1.2 mm. This allows the displacement or deformation range of the spacer element to be controlled within a specific distance range. Please refer to Figure 5, which is a schematic diagram illustrating the parameter VG according to the first embodiment of the present invention.

[0031] The distance between the first and second regions in the direction perpendicular to the optical axis is VG, and the distance between the first and second regions in the direction parallel to the optical axis is HG, which satisfies the following condition: 0.03 ≤ VG / HG ≤ 3.1. This allows the displacement or deformation range of the spacer element to be controlled within a specific distance range. Please refer to Figure 5, which is a schematic diagram illustrating parameters HG and VG according to the first embodiment of the present invention.

[0032] Define a cross section parallel to and passing through the optical axis. Within this cross section, the length of a first region in the direction perpendicular to the optical axis is RF1, and the length of a second region in the direction perpendicular to the optical axis is RF2, satisfying the condition: 0.1 ≤ RF1 / RF2 ≤ 5.1. This improves the yield of the assembly mechanism at a specific length ratio. The condition that RF1 / RF2 ≤ 2.5 also applies. Please refer to Figure 5, which is a schematic diagram illustrating parameters RF1 and RF2 according to the first embodiment of the present invention.

[0033] The maintaining part may further have a stop surface, and the spacer element may further have a corresponding stop surface disposed opposite to the stop surface, with the distance between the corresponding stop surface and the stop surface gradually increasing in the direction away from the second region. The stop surface and the corresponding stop surface have an included angle A1 on a section parallel to and passing through the optical axis, which satisfies the following condition: A1 ≤ 20 degrees. This avoids excessive deformation of the spacer element, thereby extending the lifespan of the optical lens. Please refer to Figure 5, which is a schematic diagram illustrating parameter A1 according to the first embodiment of the present invention.

[0034] The length of the stopping surface on the cross section is SF, and the corresponding length of the stopping surface on the cross section is CSF, which satisfies the following condition: 0.4 ≤ SF / CSF ≤ 2.5. This provides sufficient support after the spacer element deforms. Please refer to Figure 5, which is a schematic diagram illustrating the parameters SF and CSF according to the first embodiment of the present invention.

[0035] In one embodiment, the off-axis surface of the spacer element faces the lens barrel, wherein the distance between the off-axis surface and the lens barrel in a direction perpendicular to the optical axis is SG, which satisfies the following condition: 0.007 mm ≤ SG ≤ 0.06 mm. Therefore, within a specific distance range, a certain level of optical quality imaging can be maintained. Please refer to Figure 11, which is a schematic diagram illustrating the parameter SG according to the second embodiment of the present invention.

[0036] The farthest distance between the spacer element and the center of the lens is SL, and the distance between the off-axis surface and the lens barrel in the direction perpendicular to the optical axis is SG. These distances satisfy the following condition: 0.9901 ≤ SL / (SL+SG) ≤ 0.9999. Therefore, by using a clearance fit in the assembly of the mechanism, the clearance size can be maintained within a specific range to ensure the stability of the overall mechanism. Please refer to Figures 10 and 11, which are schematic diagrams illustrating parameters SL and SG according to the second embodiment of the present invention. The spacer element can be an annular element or an arc-shaped element, but the present invention is not limited thereto. For example, please refer to Figures 24 to 26, which are planar schematic diagrams illustrating the spacer elements of optical lenses according to different embodiments of the present invention. As shown in Figure 24, the spacer element 43 is an annular element. As shown in Figure 25, the spacer element 53 is an arc-shaped element with a single slit, and its shape can be designed and configured, for example, to correspond to a lens with a single slit, but the present invention is not limited thereto. As shown in Figure 26, the spacer element 63 is an arc-shaped element with a pair of tangent edges. Its shape can be designed and configured, for example, to correspond to a lens with a pair of tangent edges, but the present invention is not limited thereto. The farthest distance between the spacer element and the center of the lens can be regarded as the outer diameter of the annular spacer element or the arc-shaped spacer element.

[0037] In another embodiment, the off-axis surface of the spacer element faces the holding element, wherein the distance between the off-axis surface and the holding element in the direction perpendicular to the optical axis is SGD, which satisfies the following condition: 0.007 mm ≤ SGD ≤ 0.06 mm. Therefore, within a specific distance range, a certain level of optical quality imaging can be maintained. Please refer to Figure 5, which is a schematic diagram illustrating the parameter SGD according to the first embodiment of the present invention.

[0038] The farthest distance between the spacer element and the center of the lens is SL, and the distance between the off-axis surface and the holding element in the direction perpendicular to the optical axis is SGD, which can satisfy the following condition: 0.9901 ≤ SL / (SL+SGD) ≤ 0.9999. Therefore, by using a clearance fit for mechanism assembly, the clearance size can be maintained within a specific range to ensure the stability of the overall mechanism. Please refer to Figures 4 and 5, which respectively illustrate schematic diagrams of parameters SL and SGD according to the first embodiment of the present invention. The spacer element can be an annular element or an arc-shaped element, but the present invention is not limited thereto. The spacer element can be designed and configured as an arc-shaped element with a truncated edge, for example, to correspond to a lens with a truncated edge, but the present invention is not limited thereto. The farthest distance between the spacer element and the center of the lens can be considered as the outer diameter of the annular spacer element or the arc-shaped spacer element.

[0039] The present invention provides a camera module comprising an electronic photosensitive element and the aforementioned optical lens, wherein the electronic photosensitive element is disposed on the imaging surface of the optical lens.

[0040] The present invention provides an electronic device comprising the aforementioned camera module.

[0041] The various technical features in the optical lens disclosed in this invention can be combined and configured to achieve corresponding effects.

[0042] Based on the above implementation methods, specific embodiments are presented below and described in detail with reference to the accompanying drawings.

[0043] <First Embodiment>

[0044] Please refer to Figures 1 to 6, where Figure 1 shows a cross-sectional view of the optical lens according to the first embodiment of the present invention, Figure 2 shows an enlarged view of region EL2 in Figure 1, Figure 3 shows an exploded view of the optical lens in Figure 1, Figure 4 shows a cross-sectional view of the optical lens in Figure 1, Figure 5 shows an enlarged view of region EL5 in Figure 4, and Figure 6 shows a planar view of the spacer elements of the optical lens according to the first embodiment of the present invention. To clearly illustrate the relative arrangements, some elements have been omitted or simplified. For example, the details of the lens group are not used to limit the present invention, therefore the detailed outline of the lens group is not shown in the figures.

[0045] The optical lens 1 of this embodiment has an optical axis OA, and the optical lens 1 includes a lens barrel 10, a lens group 11, a spacer element 13 and a holding element 15.

[0046] The optical axis OA of the optical lens 1 passes through the lens barrel 10, which has a first annular surface CS1 that surrounds the optical axis OA.

[0047] Lens group 11 includes a plurality of lenses E0 and E1 arranged sequentially along the optical axis OA. At least one lens in lens group 11 is a plastic lens and at least another lens is a glass lens, and lens group 11 is arranged along the optical axis OA on the first annular surface CS1 of lens barrel 10. Specifically, these lenses E0 and E1 in lens group 11 are arranged sequentially along the optical axis OA, and all lenses E0 and E1 are located on the first annular surface CS1 of lens barrel 10. Lens E1 is made of plastic and has a first region R1 that surrounds the optical axis OA.

[0048] Spacer element 13 is disposed adjacent to lens E1 and surrounds the optical axis OA. Spacer element 13 is made of plastic and has a first surface 131, a second surface 132, a paraxial surface 133, and an off-axis surface 134. As shown in Figures 2 and 5, the first surface 131 and the second surface 132 are disposed opposite to each other, and the first region R1 of lens E1 is supported on the first surface 131 in a direction parallel to the optical axis OA. The paraxial surface 133 is connected to the side of the first surface 131 near the optical axis OA and to the side of the second surface 132 near the optical axis OA. The paraxial surface 133 surrounds the optical axis OA and tapers in a direction toward the optical axis OA to form a light-passing aperture PH. The off-axis surface 134 is connected to the side of the first surface 131 away from the optical axis OA and to the side of the second surface 132 away from the optical axis OA. The off-axis surface 134 is disposed opposite to the paraxial surface 133.

[0049] As shown in Figures 4 and 5, the maintaining element 15 is made of metal and is fixedly disposed with respect to the lens barrel 10 to maintain the relatively fixed position between the lens E1 and the lens barrel 10 on the optical axis OA. Furthermore, a spacer element 13 is disposed between the lens E1 and the maintaining element 15. The maintaining element 15 has a second toroidal surface CS2 surrounding the optical axis OA and a second region R2, wherein the second toroidal surface CS2 faces the optical axis OA, and the second region R2 is supported on the second surface 132 of the spacer element 13 in a direction parallel to the optical axis OA. In this embodiment, the second toroidal surface CS2 of the maintaining element 15 is assembled with the lens barrel 10 and rests against the spacer element 13.

[0050] Furthermore, the holding element 15 includes a base 150, a holding portion 151, and a barb structure 152. The base 150 is fixedly disposed to the lens barrel 10. The holding portion 151 is connected to the base 150 and extends in a direction toward the optical axis OA, and the holding portion 151 has the second region R2. The barb structure 152 is connected to the base 150 and extends in a direction toward the optical axis OA, and the barb structure 152 faces the lens E1 and is spaced apart from the lens E1. The barb structure 152 is spaced apart from the holding portion 151, and the spacer element 13 is disposed between the barb structure 152 and the holding portion 151. In addition, the barb structure 152 is closer to the optical axis OA than the off-axis surface 134 of the spacer element 13, and the barb structure 152 is farther away from the optical axis OA than the lens E1.

[0051] The maintaining element 15 and the spacer element 13 are fitted with a clearance between them in a direction perpendicular to the optical axis OA. Specifically, the second annular surface CS2 of the maintaining element 15 faces the off-axis surface 134 of the spacer element 13, and a gap GP is formed between the second annular surface CS2 and the off-axis surface 134. Furthermore, the gap GP extends from the off-axis surface 134 of the spacer element 13 along the first surface 131 toward the optical axis OA. In this embodiment, as shown in FIG5, the gap GP overlaps with the second region R2 of the maintaining element 15 in a direction parallel to the optical axis OA. The distance between the off-axis surface 134 and the maintaining element 15 in the direction perpendicular to the optical axis OA is SGD, which satisfies the following condition: SGD = 0.03 mm.

[0052] As shown in Figures 5 and 6, the first region R1 of lens E1 and the second region R2 of the holding element 15 do not overlap in the direction parallel to the optical axis OA. It should be noted that the first region R1 and the second region R2 marked in Figure 6 refer to the positions of the first region R1 of lens E1 and the second region R2 of the holding element 15 respectively projected onto the spacer element 13 in the direction parallel to the optical axis OA.

[0053] The distance between the first region R1 and the second region R2 in the direction perpendicular to the optical axis OA is VG, which satisfies the following condition: VG = 0.54 mm.

[0054] The distance between the first region R1 and the second region R2 in the direction perpendicular to the optical axis OA is VG, and the distance between the first region R1 and the second region R2 in the direction parallel to the optical axis OA is HG, which satisfies the following conditions: VG = 0.54 mm; HG = 0.55 mm; and VG / HG = 0.98.

[0055] As shown in Figures 4 and 5, the farthest distance between the spacer element 13 and the center of the lens E1 is SL, and the distance between the off-axis surface 134 of the spacer element 13 and the holding element 15 in the direction perpendicular to the optical axis OA is SGD, which satisfies the following conditions: SL = 7.32 mm; SGD = 0.03 mm; and SL / (SL+SGD) = 0.9959.

[0056] Define a cross section parallel to and passing through the optical axis OA. On this cross section, the length of a first region R1 in the direction perpendicular to the optical axis OA is RF1, and the length of a second region R2 in the direction perpendicular to the optical axis OA is RF2, satisfying the following conditions: RF1 = 0.24 mm; RF2 = 0.23 mm; and RF1 / RF2 = 1.04.

[0057] In this embodiment, as shown in FIG5, the holding portion 151 of the holding element 15 further has a stop surface TS1, and the spacer element 13 further has a corresponding stop surface TS2. The stop surface TS1 and the corresponding stop surface TS2 are disposed opposite to each other, and the distance between the corresponding stop surface TS2 and the stop surface TS1 gradually increases along the direction away from the second region R2. Wherein, on the cross section parallel to and passing through the optical axis OA, there is an included angle A1 between the stop surface TS1 and the corresponding stop surface TS2, which satisfies the following condition: A1 = 5 degrees.

[0058] The length of the stopping surface TS1 on the cross section is SF, and the length of the corresponding stopping surface TS2 on the cross section is CSF, which satisfies the following conditions: SF = 0.38 mm; CSF = 0.43 mm; and SF / CSF = 0.88.

[0059] <Second Embodiment>

[0060] Please refer to Figures 7 to 12, where Figure 7 shows a cross-sectional view of the optical lens according to the second embodiment of the present invention, Figure 8 shows an enlarged view of region EL8 in Figure 7, Figure 9 shows an exploded view of the optical lens in Figure 7, Figure 10 shows a cross-sectional view of the optical lens in Figure 7, Figure 11 shows an enlarged view of region EL11 in Figure 10, and Figure 12 shows a planar view of the spacer element of the optical lens according to the second embodiment of the present invention. To clearly illustrate the relative arrangements, some elements have been omitted or simplified. For example, the details of the lens group are not used to limit the present invention, therefore the detailed outline of the lens group is not shown in the figures.

[0061] The optical lens 2 of this embodiment has an optical axis OA, and the optical lens 2 includes a lens barrel 20, a lens group 21, a spacer element 23, a holding element 25, a light shield 27, and a damper 29.

[0062] The optical axis OA of the optical lens 2 passes through the lens barrel 20, which has a first annular surface CS1 that surrounds the optical axis OA.

[0063] Lens group 21 includes a plurality of lenses E0 and E1 arranged sequentially along the optical axis OA. At least one lens in lens group 21 is a plastic lens and at least another lens is a glass lens, and lens group 21 is arranged along the optical axis OA on the first annular surface CS1 of lens barrel 20. Specifically, these lenses E0 and E1 in lens group 21 are arranged sequentially along the optical axis OA, and all lenses E0 and E1 are located on the first annular surface CS1 of lens barrel 20. Lens E1 is made of plastic and has a first region R1 that surrounds the optical axis OA.

[0064] Spacer element 23 is disposed adjacent to lens E1 and surrounds the optical axis OA. Spacer element 23 is made of plastic and has a first surface 231, a second surface 232, a paraxial surface 233, and an off-axis surface 234. As shown in Figures 8 and 11, the first surface 231 and the second surface 232 are disposed opposite to each other, and the first region R1 of lens E1 is supported on the first surface 231 in a direction parallel to the optical axis OA. The paraxial surface 233 is connected to the side of the first surface 231 near the optical axis OA and to the side of the second surface 232 near the optical axis OA. The paraxial surface 233 surrounds the optical axis OA and tapers in a direction toward the optical axis OA to form a light-passing aperture PH. The off-axis surface 234 is connected to the side of the first surface 231 away from the optical axis OA and to the side of the second surface 232 away from the optical axis OA. The off-axis surface 234 is disposed opposite to the paraxial surface 233.

[0065] In this embodiment, as shown in FIG11, the near-axial surface 233 of the spacer element 23 has an anti-reflective surface ARL, and the reflectivity of the anti-reflective surface ARL is lower than that of the off-axial surface 234.

[0066] The lens barrel 20 and the spacer element 23 are fitted with a clearance between them in a direction perpendicular to the optical axis OA. Specifically, the first annular surface CS1 of the lens barrel 20 faces the off-axis surface 234 of the spacer element 23, and a gap GP is formed between the first annular surface CS1 and the off-axis surface 234. Furthermore, the gap GP extends from the off-axis surface 234 of the spacer element 23 along the first surface 231 toward the optical axis OA. In this embodiment, as shown in FIG11, the distance between the off-axis surface 234 and the lens barrel 20 in the direction perpendicular to the optical axis OA is SG, which satisfies the following condition: SG = 0.02 mm.

[0067] A light-shielding plate 27 is disposed between the lens E1 and the spacer element 23, and the light-shielding plate 27 surrounds the optical axis OA. The first region R1 of the lens E1 is indirectly supported on the first surface 231 of the spacer element 23 through the light-shielding plate 27 in a direction parallel to the optical axis OA.

[0068] Damping 29 is disposed in the gap GP. In this embodiment, damping 29 is located between the first annular surface CS1 of the lens barrel 20 and the off-axis side surface 234 of the spacer element 23, but the present invention is not limited thereto.

[0069] As shown in Figures 10 and 11, the holding element 25 is made of metal and is fixedly disposed with respect to the lens barrel 20 to maintain the relatively fixed position between the lens E1 and the lens barrel 20 on the optical axis OA. Furthermore, a spacer element 23 is disposed between the lens E1 and the holding element 25. The holding element 25 has a second annular surface CS2 surrounding the optical axis OA and a second region R2, wherein the second annular surface CS2 faces the optical axis OA, and the second region R2 is supported on the second surface 232 of the spacer element 23 in a direction parallel to the optical axis OA. Further, the holding element 25 includes a base 250 and a holding portion 251. The base 250 is fixedly disposed with respect to the lens barrel 20. The holding portion 251 is connected to the base 250 and extends in a direction toward the optical axis OA, and the holding portion 251 has the second region R2. In this embodiment, as shown in Figure 11, the gap GP and the second region R2 overlap in a direction parallel to the optical axis OA.

[0070] As shown in Figures 11 and 12, the first region R1 of lens E1 and the second region R2 of the holding element 25 do not overlap in the direction parallel to the optical axis OA. It should be noted that the first region R1 and the second region R2 marked in Figure 12 refer to the positions of the first region R1 of lens E1 and the second region R2 of the holding element 25 respectively projected onto the spacer element 23 in the direction parallel to the optical axis OA.

[0071] The distance between the first region R1 and the second region R2 in the direction perpendicular to the optical axis OA is VG, which satisfies the following condition: VG = 0.22 mm.

[0072] The distance between the first region R1 and the second region R2 in the direction perpendicular to the optical axis OA is VG, and the distance between the first region R1 and the second region R2 in the direction parallel to the optical axis OA is HG, which satisfies the following conditions: VG = 0.22 mm; HG = 0.34 mm; and VG / HG = 0.65.

[0073] As shown in Figures 10 and 11, the farthest distance between the spacer element 23 and the center of the lens E1 is SL, and the distance between the off-axis surface 234 of the spacer element 23 and the lens barrel 20 in the direction perpendicular to the optical axis OA is SG, which satisfies the following conditions: SL = 7.28 mm; SG = 0.02 mm; and SL / (SL+SG) = 0.9973.

[0074] Define a cross section parallel to and passing through the optical axis OA. On this cross section, the length of a first region R1 in the direction perpendicular to the optical axis OA is RF1, and the length of a second region R2 in the direction perpendicular to the optical axis OA is RF2, satisfying the following conditions: RF1 = 0.32 mm; RF2 = 0.13 mm; and RF1 / RF2 = 2.46.

[0075] In this embodiment, as shown in FIG11, the holding portion 251 of the holding element 25 further has a stop surface TS1, and the spacer element 23 further has a corresponding stop surface TS2. The stop surface TS1 and the corresponding stop surface TS2 are disposed opposite to each other, and the distance between the corresponding stop surface TS2 and the stop surface TS1 gradually increases along the direction away from the second region R2. Wherein, on the cross section parallel to and passing through the optical axis OA, there is an included angle A1 between the stop surface TS1 and the corresponding stop surface TS2, which satisfies the following condition: A1 = 10 degrees.

[0076] The length of the stopping surface TS1 on the cross section is SF, and the length of the corresponding stopping surface TS2 on the cross section is CSF, which satisfies the following conditions: SF = 0.23 mm; CSF = 0.19 mm; and SF / CSF = 1.21.

[0077] <Third Embodiment>

[0078] Please refer to Figures 13 to 18, where Figure 13 shows a cross-sectional view of the optical lens according to the third embodiment of the present invention, Figure 14 shows an enlarged view of region EL14 in Figure 13, Figure 15 shows an exploded view of the optical lens in Figure 13, Figure 16 shows a cross-sectional view of the optical lens in Figure 13, Figure 17 shows an enlarged view of region EL17 in Figure 16, and Figure 18 shows a planar view of the spacer element of the optical lens according to the third embodiment of the present invention. To clearly illustrate the relative arrangements, some elements have been omitted or simplified. For example, the details of the lens group are not used to limit the present invention, therefore the detailed outline of the lens group is not shown in the figures.

[0079] The optical lens 3 of this embodiment has an optical axis OA, and the optical lens 3 includes a lens barrel 30, a lens group 31, a spacer element 33, a holding element 35, and a light shield 37.

[0080] The optical axis OA of the optical lens 3 passes through the lens barrel 30, which has a first annular surface CS1 that surrounds the optical axis OA.

[0081] Lens group 31 includes a plurality of lenses E0 and E1 arranged sequentially along the optical axis OA. At least one lens in lens group 31 is a plastic lens and at least another lens is a glass lens, and lens group 31 is arranged along the optical axis OA on the first annular surface CS1 of lens barrel 30. Specifically, these lenses E0 and E1 in lens group 31 are arranged sequentially along the optical axis OA, and all of these lenses E0 and E1 are located on the first annular surface CS1 of lens barrel 30. Lens E1 is made of plastic and has a first region R1 that surrounds the optical axis OA.

[0082] Spacer element 33 is disposed adjacent to lens E1 and surrounds the optical axis OA. Spacer element 33 is made of plastic and has a first surface 331, a second surface 332, a paraxial surface 333, and an off-axis surface 334. As shown in Figures 14 and 17, the first surface 331 and the second surface 332 are disposed opposite to each other, and the first region R1 of lens E1 is supported on the first surface 331 in a direction parallel to the optical axis OA. The paraxial surface 333 is connected to the side of the first surface 331 near the optical axis OA and to the side of the second surface 332 near the optical axis OA. The paraxial surface 333 surrounds the optical axis OA and tapers in a direction toward the optical axis OA to form a light-passing aperture PH. The off-axis surface 334 is connected to the side of the first surface 331 away from the optical axis OA and to the side of the second surface 332 away from the optical axis OA. The off-axis surface 334 is disposed opposite to the paraxial surface 333.

[0083] The lens barrel 30 and the spacer element 33 are fitted with a clearance between them in a direction perpendicular to the optical axis OA. Specifically, the first annular surface CS1 of the lens barrel 30 faces the off-axis side surface 334 of the spacer element 33, and a gap GP is formed between the first annular surface CS1 and the off-axis side surface 334. Furthermore, the gap GP extends from the off-axis side surface 334 of the spacer element 33 along the first surface 331 toward the optical axis OA. In this embodiment, as shown in FIG17, the distance between the off-axis side surface 334 and the lens barrel 30 in the direction perpendicular to the optical axis OA is SG, which satisfies the following condition: SG = 0.03 mm.

[0084] As shown in Figures 16 and 17, the maintaining element 35 is made of metal and is fixedly disposed with respect to the lens barrel 30 to maintain the relatively fixed position between the lens E1 and the lens barrel 30 on the optical axis OA. Furthermore, a spacer element 33 is disposed between the lens E1 and the maintaining element 35. The maintaining element 35 has a second toroidal surface CS2 surrounding the optical axis OA and a second region R2, wherein the second toroidal surface CS2 at least partially faces the optical axis OA, and the second region R2 is supported on the second surface 332 of the spacer element 33 in a direction parallel to the optical axis OA. In this embodiment, the second toroidal surface CS2 of the maintaining element 35 rests against the lens barrel 30 for assembly with the lens barrel 30 and rests against the second surface 332 of the spacer element 33.

[0085] Furthermore, the holding element 35 includes a base 350 and a holding portion 351. The base 350 is fixedly disposed to the lens barrel 30. The holding portion 351 is connected to the base 350 and extends in a direction toward the optical axis OA, and the holding portion 351 has the second region R2. In this embodiment, as shown in FIG17, the gap GP and the second region R2 overlap in a direction parallel to the optical axis OA.

[0086] A light-shielding plate 37 is disposed between the spacer element 33 and the support element 35, and the light-shielding plate 37 surrounds the optical axis OA. The second region R2 of the support element 35 is indirectly supported on the second surface 332 of the spacer element 33 through the light-shielding plate 37 in a direction parallel to the optical axis OA.

[0087] As shown in Figures 17 and 18, the first region R1 of lens E1 and the second region R2 of the holding element 35 do not overlap in the direction parallel to the optical axis OA. It should be noted that the first region R1 and the second region R2 marked in Figure 18 refer to the positions of the first region R1 of lens E1 and the second region R2 of the holding element 35 respectively projected onto the spacer element 33 in the direction parallel to the optical axis OA.

[0088] The distance between the first region R1 and the second region R2 in the direction perpendicular to the optical axis OA is VG, which satisfies the following condition: VG = 0.06 mm.

[0089] The distance between the first region R1 and the second region R2 in the direction perpendicular to the optical axis OA is VG, and the distance between the first region R1 and the second region R2 in the direction parallel to the optical axis OA is HG, which satisfies the following conditions: VG = 0.06 mm; HG = 0.36 mm; and VG / HG = 0.17.

[0090] As shown in Figures 16 and 17, the farthest distance between the spacer element 33 and the center of the lens E1 is SL, and the distance between the off-axis surface 334 of the spacer element 33 and the lens barrel 30 in the direction perpendicular to the optical axis OA is SG, which satisfies the following conditions: SL = 4.13 mm; SG = 0.03 mm; and SL / (SL+SG) = 0.9928.

[0091] Define a cross section parallel to and passing through the optical axis OA. On this cross section, the length of a first region R1 in the direction perpendicular to the optical axis OA is RF1, and the length of a second region R2 in the direction perpendicular to the optical axis OA is RF2, satisfying the following conditions: RF1 = 0.26 mm; RF2 = 0.24 mm; and RF1 / RF2 = 1.08.

[0092] <Fourth Embodiment>

[0093] Please refer to Figures 19 to 24, where Figure 19 shows a cross-sectional view of the optical lens according to the fourth embodiment of the present invention, Figure 20 shows an enlarged view of region EL20 in Figure 19, Figure 21 shows an exploded view of the optical lens in Figure 19, Figure 22 shows a cross-sectional view of the optical lens in Figure 19, Figure 23 shows an enlarged view of region EL23 in Figure 22, and Figure 24 shows a planar view of the spacer element of the optical lens according to the fourth embodiment of the present invention. To clearly illustrate the relative arrangements, some elements have been omitted or simplified. For example, the details of the lens group are not used to limit the present invention, therefore the detailed outline of the lens group is not shown in the figures.

[0094] The optical lens 4 of this embodiment has an optical axis OA, and the optical lens 4 includes a lens barrel 40, a lens group 41, a spacer element 43 and a holding element 45.

[0095] The optical axis OA of the optical lens 4 passes through the lens barrel 40, which has a first annular surface CS1 that surrounds the optical axis OA.

[0096] Lens group 41 includes a plurality of lenses E0 and E1 arranged sequentially along the optical axis OA. At least one lens in lens group 41 is a plastic lens and at least another lens is a glass lens, and lens group 41 is arranged along the optical axis OA on the first annular surface CS1 of lens barrel 40. Specifically, these lenses E0 and E1 in lens group 41 are arranged sequentially along the optical axis OA, and all lenses E0 and E1 are located on the first annular surface CS1 of lens barrel 40. Lens E1 is made of plastic and has a first region R1 that surrounds the optical axis OA.

[0097] Spacer element 43 is disposed adjacent to lens E1 and surrounds the optical axis OA. Spacer element 43 is made of plastic and has a first surface 431, a second surface 432, a paraxial surface 433, and an off-axis surface 434. As shown in Figures 20 and 23, the first surface 431 and the second surface 432 are disposed opposite to each other, and the first region R1 of lens E1 is supported on the first surface 431 in a direction parallel to the optical axis OA. The paraxial surface 433 is connected to the side of the first surface 431 near the optical axis OA and to the side of the second surface 432 near the optical axis OA. The paraxial surface 433 surrounds the optical axis OA and tapers in a direction toward the optical axis OA to form a light-passing aperture PH. The off-axis surface 434 is connected to the side of the first surface 431 away from the optical axis OA and to the side of the second surface 432 away from the optical axis OA. The off-axis surface 434 is disposed opposite to the paraxial surface 433.

[0098] In this embodiment, as shown in FIG23, the near-axial surface 433 of the spacer element 43 has an anti-reflective surface ARL, and the reflectivity of the anti-reflective surface ARL is lower than that of the off-axial surface 434.

[0099] The lens barrel 40 and the spacer element 43 are fitted with a clearance between them in a direction perpendicular to the optical axis OA. Specifically, the first annular surface CS1 of the lens barrel 40 faces the off-axis surface 434 of the spacer element 43, and a gap GP is formed between the first annular surface CS1 and the off-axis surface 434. Furthermore, the gap GP extends from the off-axis surface 434 of the spacer element 43 along the second surface 432 toward the optical axis OA. In this embodiment, as shown in FIG23, the distance between the off-axis surface 434 and the lens barrel 40 in the direction perpendicular to the optical axis OA is SG, which satisfies the following condition: SG = 0.02 mm.

[0100] As shown in Figures 22 and 23, the maintaining element 45 is made of metal and is fixedly disposed with respect to the lens barrel 40 to maintain the relatively fixed position between the lens E1 and the lens barrel 40 on the optical axis OA. Furthermore, a spacer element 43 is disposed between the lens E1 and the maintaining element 45. The maintaining element 45 has a second toroidal surface CS2 surrounding the optical axis OA and a second region R2, wherein the second toroidal surface CS2 at least partially faces the optical axis OA, and the second region R2 is supported on the second surface 432 of the spacer element 43 in a direction parallel to the optical axis OA. In this embodiment, the second toroidal surface CS2 of the maintaining element 45 rests against the lens barrel 40 for assembly with the lens barrel 40 and rests against the second surface 432 of the spacer element 43.

[0101] Furthermore, the holding element 45 includes a base 450 and a holding portion 451. The base 450 is fixedly disposed to the lens barrel 40. The holding portion 451 is connected to the base 450 and extends in a direction toward the optical axis OA, and the holding portion 451 has the second region R2. In this embodiment, as shown in FIG23, the gap GP overlaps with the first region R1 in a direction parallel to the optical axis OA.

[0102] As shown in Figures 23 and 24, the first region R1 of lens E1 and the second region R2 of the holding element 45 do not overlap in the direction parallel to the optical axis OA. It should be noted that the first region R1 and the second region R2 marked in Figure 24 refer to the positions of the first region R1 of lens E1 and the second region R2 of the holding element 45 respectively projected onto the spacer element 43 in the direction parallel to the optical axis OA.

[0103] The distance between the first region R1 and the second region R2 in the direction perpendicular to the optical axis OA is VG, which satisfies the following condition: VG = 0.02 mm.

[0104] The distance between the first region R1 and the second region R2 in the direction perpendicular to the optical axis OA is VG, and the distance between the first region R1 and the second region R2 in the direction parallel to the optical axis OA is HG, which satisfies the following conditions: VG = 0.02 mm; HG = 0.31 mm; and VG / HG = 0.06.

[0105] As shown in Figures 22 and 23, the farthest distance between the spacer element 43 and the center of the lens E1 is SL, and the distance between the off-axis surface 434 of the spacer element 43 and the lens barrel 40 in the direction perpendicular to the optical axis OA is SG, which satisfies the following conditions: SL = 5.74 mm; SG = 0.02 mm; and SL / (SL+SG) = 0.9965.

[0106] Define a cross section parallel to and passing through the optical axis OA. On this cross section, the length of a first region R1 in the direction perpendicular to the optical axis OA is RF1, and the length of a second region R2 in the direction perpendicular to the optical axis OA is RF2, satisfying the following conditions: RF1 = 0.1 mm; RF2 = 0.21 mm; and RF1 / RF2 = 0.48.

[0107] In this embodiment, as shown in FIG23, the holding portion 451 of the holding element 45 further has a stop surface TS1, and the spacer element 43 further has a corresponding stop surface TS2. The stop surface TS1 and the corresponding stop surface TS2 are disposed opposite to each other, and the distance between the corresponding stop surface TS2 and the stop surface TS1 gradually increases along the direction away from the second region R2. Wherein, on the cross section parallel to and passing through the optical axis OA, there is an included angle A1 between the stop surface TS1 and the corresponding stop surface TS2, which satisfies the following condition: A1 = 6 degrees.

[0108] The length of the stopping surface TS1 on the cross section is SF, and the length of the corresponding stopping surface TS2 on the cross section is CSF, which satisfies the following conditions: SF = 0.23 mm; CSF = 0.28 mm; and SF / CSF = 0.82.

[0109] In this embodiment, as shown in FIG24, the spacer element 43 is an annular element, but the present invention is not limited thereto. For example, please refer to FIG25 and FIG26, wherein FIG25 illustrates a plan view of the spacer element of an optical lens according to one embodiment of the present invention, and FIG26 illustrates a plan view of the spacer element of an optical lens according to another embodiment of the present invention.

[0110] In the embodiment shown in FIG25, the spacer element 53 is an arc-shaped element with a single cut edge. Its shape may be designed and configured, for example, to correspond to a lens with a single cut edge, but the present invention is not limited thereto.

[0111] In the embodiment shown in FIG26, the spacer element 63 is an arc-shaped element with a pair of tangents, the shape of which may be designed and configured, for example, to correspond to a lens with a pair of tangents, but the present invention is not limited thereto.

[0112] <Fifth Embodiment>

[0113] Please refer to Figures 27 and 28, wherein Figure 27 shows a perspective view of one side of an electronic device according to a fifth embodiment of the present invention, and Figure 28 shows a perspective view of the other side of the electronic device of Figure 27.

[0114] In this embodiment, the electronic device 200 is a smartphone. The electronic device 200 includes multiple camera modules 200a, 200b, 200c and 200d, a flash module 201, a focus assist module 202, an image signal processor 203, a display module (user interface) 204 and an image software processor (not shown).

[0115] These camera modules include an ultra-wide-angle camera module 200a, a high-resolution camera module 200b, a telephoto camera module 200c, and a telephoto camera module 200d. The telephoto camera module 200d includes the optical lens of this invention and an electronic image sensor (not shown), wherein the electronic image sensor is disposed on the imaging plane of the optical lens. However, this invention is not limited thereto. Camera modules 200a, 200b, and 200c may also include the optical lens of this invention.

[0116] The ultra-wide-angle camera module 200a has the ability to capture multiple scenes. Figure 29 illustrates a schematic diagram of images captured by the ultra-wide-angle camera module 200a.

[0117] The high-resolution camera module 200b features high resolution and low distortion. The high-resolution camera module 200b can further capture a portion of the image in Figure 29. Figure 30 illustrates a schematic diagram of an image captured by the high-resolution camera module 200b.

[0118] Telephoto camera modules 200c and 200d have high magnification capabilities. Telephoto camera module 200c or 200d can further capture a portion of the image in Figure 30. Figure 31 illustrates a schematic diagram of image capture using telephoto camera module 200c or 200d.

[0119] When a user photographs a subject, the electronic device 200 uses the ultra-wide-angle camera module 200a, high-resolution camera module 200b, telephoto camera module 200c, or telephoto camera module 200d to capture light, activates the flash module 201 for supplemental lighting, and uses the subject distance information provided by the focus assist module 202 for fast focusing. The image signal processor 203 then performs image optimization processing to further improve the image quality produced by the camera module, while also providing zoom functionality. The focus assist module 202 can use an infrared or laser focus assist system to achieve fast focusing. The display module 204 can be a touchscreen with touch functionality, allowing manual adjustment of the shooting angle, switching between different camera modules, and utilizing the diverse functions of the image software processor for image capture and processing (or shooting can be performed using a physical shooting button). The image processed by the image software processor can be displayed on the display module 204.

[0120] <Sixth Embodiment>

[0121] Please refer to Figure 32, which shows a perspective view of one side of an electronic device according to a sixth embodiment of the present invention.

[0122] In this embodiment, the electronic device 300 is a smartphone. The electronic device 300 includes camera modules 300a, 300b, 300c, 300d, 300e, 300f, 300g, 300h, and 300i, a flash module 301, an image signal processor, a display module, and an image software processor (not shown). Camera modules 300a, 300b, 300c, 300d, 300e, 300f, 300g, 300h, and 300i are all located on the same side of the electronic device 300, while the display module is located on the other side of the electronic device 300. The camera module 300c includes an optical lens of the present invention and an electronic photosensitive element (not shown), wherein the electronic photosensitive element is disposed on the imaging surface of the optical lens.

[0123] Camera module 300a is a telephoto camera module with a reversible optical path; camera module 300b is a telephoto camera module with a reversible optical path; camera module 300c is a telephoto camera module; camera module 300d is a telephoto camera module; camera module 300e is a wide-angle camera module; camera module 300f is a wide-angle camera module; camera module 300g is an ultra-wide-angle camera module; camera module 300h is a Time of Flight (ToF) camera module; and camera module 300i is an ultra-wide-angle camera module. In this embodiment, camera modules 300i, 300a, 300b, 300c, 300d, 300e, 300f, and 300g have different viewing angles, allowing the electronic device 300 to provide different magnifications to achieve optical zoom shooting effects. Furthermore, camera modules 300a and 300b are telephoto camera modules with light-reflecting elements. Additionally, camera module 300h can acquire depth information of the image. The above-described electronic device 300 is exemplified by including multiple camera modules 300a, 300b, 300c, 300d, 300e, 300f, 300g, 300h, and 300i, but the number and configuration of the camera modules are not intended to limit the invention. When the user takes a picture of the subject, the electronic device 300 uses camera modules 300a, 300b, 300c, 300d, 300e, 300f, 300g, 300h, or 300i to focus the light and capture the image, activates the flash module 301 to provide supplementary lighting, and performs subsequent processing in a manner similar to the aforementioned embodiments, which will not be described in detail here.

[0124] <Seventh Embodiment>

[0125] Please refer to Figures 33 to 35, wherein Figure 33 shows a perspective view of an electronic device according to a seventh embodiment of the present invention, Figure 34 shows a side view of the electronic device of Figure 33, and Figure 35 shows a top view of the electronic device of Figure 33.

[0126] In this embodiment, the electronic device 400 is a car. The electronic device 400 includes a plurality of automotive camera modules 400a, and these camera modules 400a respectively include, for example, the optical lenses of the present invention and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of these optical lenses. These camera modules 400a can be applied, for example, to panoramic driving assistance systems, dashcams, and reversing cameras.

[0127] As shown in Figure 33, the camera module 400a can be installed, for example, around the vehicle body to capture images of the car's surroundings, helping to identify road conditions outside the vehicle and thus enabling autonomous driving assistance functions. Furthermore, the images can be combined into a panoramic view through an image processing software, providing the driver with images of blind spots, allowing the driver to monitor the surroundings of the vehicle for easier driving and parking.

[0128] As shown in Figure 34, the camera module 400a can be installed, for example, below the left and right rearview mirrors respectively. The viewing angle of the camera module 400a can be 40 degrees to 90 degrees to capture image information within the range of the left and right lanes.

[0129] As shown in Figure 35, the camera module 400a can also be installed, for example, below the left and right rearview mirrors and inside the front and rear windshields, thereby helping the driver obtain information about the external space outside the cockpit, providing more perspectives to reduce blind spots and improve driving safety.

[0130] <Eighth Embodiment>

[0131] Please refer to Figure 36, which is a perspective schematic diagram illustrating an electronic device according to an eighth embodiment of the present invention.

[0132] In this embodiment, the electronic device 500 is an unmanned aerial vehicle (UAV), such as a delivery UAV with a housing. The electronic device 500 includes a front camera module 500a and a side camera module 500b. The front camera module 500a and the side camera module 500b each include, for example, the optical lenses of this invention and an electronic image sensor, wherein the electronic image sensor is disposed on the imaging surface of these optical lenses. The front camera module 500a and the side camera module 500b provide the electronic device 500 with reliable optical quality and environmental tolerance. The electronic device 500 is exemplified by including two camera modules 500a and 500b, but the number and configuration of the camera modules are not intended to limit the invention.

[0133] The optical lens and camera module of this invention are not limited to applications in smartphones, panoramic driving assistance systems, dashcams, reversing cameras, and drones. They can be applied to various mobile focusing systems as needed, and feature excellent aberration correction and good image quality. For example, the optical lens and camera module can be widely used in electronic devices such as 3D image capture, digital cameras, mobile devices, digital tablets, smart TVs, network monitoring equipment, multi-lens devices, recognition systems, motion-sensing game consoles, and wearable devices. The aforementioned electronic devices are merely illustrative examples of practical applications of this invention and do not limit the scope of application of the optical lens and camera module of this invention.

[0134] While the present invention has been disclosed above with reference to the foregoing embodiments, these embodiments are not intended to limit the invention. Any modifications and refinements made without departing from the spirit and scope of the invention are within the scope of patent protection of the present invention. For the scope of protection defined by the present invention, please refer to the appended claims.

[0135] 1,2,3,4: Optical lenses 10, 20, 30, 40: Lens tube 11,21,31,41: Lens Group 13,23,33,43,53,63: Spacer elements 131,231,331,431: First surface 132,232,332,432: Second surface 133,233,333,433: Paraxial surfaces 134,234,334,434: Off-axis surfaces 15, 25, 35, 45: Holding elements 150, 250, 350, 450: Base 151,251,351,451: Maintenance Department 152: Barbed Structure 27,37: Light-blocking sheet 29: Damping 200, 300, 400, 500: Electronic devices 200a, 200b, 200c, 200d, 300a, 300b, 300c, 300d, 300e, 300f, 300g, 300h, 300i, 400a, 500a, 500b: Camera modules 201,301: Flash module 202: Focusing Assist Module 203: Image Signal Processor 204: Display Module A1: Angle between the stopping surface and the corresponding stopping surface on a section parallel to and passing through the optical axis. ARL: Anti-reflective surface CS1: First torus CS2: Second Torus CSF: Length of the corresponding stopping surface on the cross section E0, E1: Lenses GP: gap HG: The distance between the first and second regions in a direction parallel to the optical axis. OA: Optical Axis PH: Light transmission hole RF1: The length of the first region in a cross-section perpendicular to the optical axis and passing through the optical axis. RF2: The length of the second region in a cross-section perpendicular to the optical axis and passing through the optical axis. R1: First Region R2: Second Region SG: The distance between the off-axis surface and the lens barrel in the direction perpendicular to the optical axis. SGD: The distance between the off-axis surface and the holding element in the direction perpendicular to the optical axis. SF: Length of the stopping surface on the cross section SL: The farthest distance between the spacer element and the center of the lens. TS1: Stop surface TS2: Corresponding stopping surface VG: The distance between the first and second regions in the direction perpendicular to the optical axis.

Claims

1. An optical lens having an optical axis, and the optical lens comprising: a lens barrel through which the optical axis passes; a lens disposed along the optical axis in the lens barrel, the lens having a first region surrounding the optical axis; and a spacer element disposed adjacent to the lens and surrounding the optical axis, the spacer element having: a first surface on which the first region of the lens is supported in a direction parallel to the optical axis; and a second surface disposed opposite to the first surface; A paraxial surface is connected to the side of the first surface near the optical axis and the side of the second surface near the optical axis. The paraxial surface surrounds the optical axis and tapers towards the optical axis to form a light-transmitting aperture. An off-axis surface is connected to the side of the first surface away from the optical axis and the side of the second surface away from the optical axis. A holding element is fixedly disposed with the lens barrel to maintain a relatively fixed position between the lens and the lens barrel on the optical axis. A spacer element is disposed between the lens and the holding element, and the holding element has: a second region supported on the second surface in a direction parallel to the optical axis, and the second region surrounds the optical axis. The first region and the second region do not overlap in the projection direction parallel to the optical axis.

2. The optical lens as claimed in claim 1, wherein the sustaining element includes a sustaining portion extending in a direction toward the optical axis, and the sustaining portion having the second region.

3. The optical lens as claimed in claim 2, wherein the distance between the first region and the second region in a direction perpendicular to the optical axis is VG, which satisfies the following condition: 0.01 mm ≤ VG ≤ 1.2 mm.

4. The optical lens as described in claim 3, wherein the distance between the first region and the second region in the direction perpendicular to the optical axis is VG, and the distance between the first region and the second region in the direction parallel to the optical axis is HG, which satisfies the following condition: 0.03 ≤ VG / HG ≤ 3.

1.

5. The optical lens as claimed in claim 2, wherein the holding element further includes a barb structure spaced apart from the holding portion, and the barb structure is closer to the optical axis than the off-axis side surface of the spacer element; and wherein, The spacer element is disposed between the barb structure and the retaining part.

6. The optical lens as claimed in claim 5, wherein the barb structure faces the lens and is spaced apart from the lens, and the barb structure is further away from the optical axis than the lens.

7. The optical lens as claimed in claim 2, wherein a cross-section is defined parallel to and passing through the optical axis; and wherein, On this cross section, the length of the first region in the direction perpendicular to the optical axis is RF1, and the length of the second region in the direction perpendicular to the optical axis is RF2, which satisfies the following condition: 0.1 ≤ RF1 / RF2 ≤ 5.

1.

8. The optical lens as claimed in claim 7, wherein on the cross section, the length of the first region in the direction perpendicular to the optical axis is RF1, and the length of the second region in the direction perpendicular to the optical axis is RF2, which satisfies the following condition: 0.2 ≤ RF1 / RF2 ≤ 2.

5.

9. The optical lens as claimed in claim 1, wherein the spacer element is made of plastic.

10. The optical lens as claimed in claim 1, wherein the sustaining element is made of metal.

11. The optical lens as claimed in claim 1 further comprises a lens group, wherein the lens group includes the lens, and the lens group has at least one plastic lens and at least one glass lens.

12. The optical lens as described in claim 11, wherein the lens is made of plastic.

13. The optical lens as claimed in claim 1, wherein at least one of the lens barrel and the holding element is clearance-fitted with the spacer element in a direction perpendicular to the optical axis.

14. The optical lens of claim 13, wherein at least one of the lens barrel and the retaining element forms a gap with the off-axis side surface, and the gap extends from the off-axis side surface along at least one of the first surface and the second surface toward the optical axis; and wherein, The gap overlaps with one of the first region and the second region in a projection direction parallel to the optical axis.

15. The optical lens as described in claim 14 further includes a damper disposed in the gap.

16. The optical lens as claimed in claim 1 further includes a light shield, wherein the light shield is disposed between the lens and the spacer element, and the light shield surrounds the optical axis.

17. The optical lens as claimed in claim 1 further includes a light-shielding plate, wherein the light-shielding plate is disposed between the spacer element and the sustaining element, and the light-shielding plate surrounds the optical axis.

18. The optical lens as claimed in claim 1, wherein the paraxial surface of the spacer element has an antireflective surface, and the reflectivity of the antireflective surface is lower than that of the offaxial surface.

19. The optical lens as claimed in claim 2, wherein the holding portion further comprises a stop surface, the spacer element further comprises a corresponding stop surface, the stop surface and the corresponding stop surface are disposed opposite to each other, and the distance between the corresponding stop surface and the stop surface gradually increases along a direction away from the second region; and wherein, Define a cross section parallel to and passing through the optical axis, where the stopping surface and the corresponding stopping surface have an angle A1 on the cross section, satisfying the following condition: A1 ≤ 20 degrees.

20. The optical lens as claimed in claim 19, wherein the length of the stop surface on the cross section is SF and the length of the corresponding stop surface on the cross section is CSF, which satisfy the following condition: 0.4 ≤ SF / CSF ≤ 2.

5.

21. A camera module comprising: an optical lens as described in claim 1; and an electronic photosensitive element disposed on an imaging surface of the optical lens.

22. An electronic device comprising: a camera module as described in claim 21.

23. An optical lens having an optical axis, and the optical lens comprising: a lens barrel through which the optical axis passes, the lens barrel having a first annular surface surrounding the optical axis; a lens disposed along the optical axis on the first annular surface, the lens having a first region surrounding the optical axis; and a spacer element disposed adjacent to the lens and surrounding the optical axis, the spacer element having: a first surface on which the first region of the lens is supported in a direction parallel to the optical axis; and a second surface disposed opposite to the first surface. A paraxial surface is connected to the side of the first surface near the optical axis and the side of the second surface near the optical axis. The paraxial surface surrounds the optical axis and tapers towards the optical axis to form a light-passing aperture. An off-axis surface is connected to the side of the first surface away from the optical axis and the side of the second surface away from the optical axis. A holding element is fixedly disposed with the lens barrel to maintain a relatively fixed position between the lens and the lens barrel on the optical axis. A spacer element is disposed between the lens and the holding element, and the holding element has: a second annular surface surrounding the optical axis; and a second region supporting the second surface in a direction parallel to the optical axis, and the second region surrounding the optical axis. The off-axis side surface forms a gap with at least one of the first annular surface and the second annular surface, and the gap extends from the off-axis side surface along at least one of the first surface and the second surface toward the optical axis; wherein the first annular surface and / or the second annular surface that forms the gap with the off-axis side surface faces the off-axis side surface; and wherein the gap overlaps with one of the first region and the second region in a projection direction parallel to the optical axis.

24. The optical lens as claimed in claim 23, wherein the sustaining element includes a sustaining portion extending in a direction toward the optical axis, and the sustaining portion having the second region.

25. The optical lens as claimed in claim 24, wherein the holding element further includes a barb structure spaced apart from the holding portion, and the barb structure is closer to the optical axis than the off-axis side surface of the spacer element; and wherein, The spacer element is disposed between the barb structure and the retaining part.

26. The optical lens as claimed in claim 25, wherein the barb structure faces the lens and is spaced apart from the lens, and the barb structure is further away from the optical axis than the lens.

27. The optical lens as claimed in claim 23, wherein the off-axis side surface faces the lens barrel, and the distance between the off-axis side surface and the lens barrel in a direction perpendicular to the optical axis is SG, which satisfies the following condition: 0.007 mm ≤ SG ≤ 0.06 mm.

28. The optical lens as claimed in claim 27, wherein the farthest distance between the spacer element and the center of the lens is SL, and the distance between the off-axis surface and the lens barrel in a direction perpendicular to the optical axis is SG, which satisfies the following condition: 0.9901 ≤ SL / (SL+SG) ≤ 0.9999.

29. The optical lens as claimed in claim 23, wherein the off-axis side surface faces the holding element; and wherein, The distance between the off-axis surface and the holding element in the direction perpendicular to the optical axis is SGD, which satisfies the following condition: 0.007 mm ≤ SGD ≤ 0.06 mm.

30. The optical lens as claimed in claim 29, wherein the farthest distance between the spacer element and the center of the lens is SL, and the distance between the off-axis surface and the holding element in a direction perpendicular to the optical axis is SGD, which satisfies the following condition: 0.9901 ≤ SL / (SL+SGD) ≤ 0.9999.

31. The optical lens as described in claim 23, wherein the spacer element is made of plastic.

32. The optical lens as described in claim 23, wherein the sustaining element is made of metal.

33. The optical lens as claimed in claim 23 further comprises a lens group, wherein the lens group includes the lens, and the lens group has at least one plastic lens and at least one glass lens.

34. The optical lens as described in claim 33, wherein the lens is made of plastic.

35. The optical lens as described in claim 23 further includes a damper, wherein the damper is disposed in the gap.

36. The optical lens as claimed in claim 23 further includes a light shield, wherein the light shield is disposed between the lens and the spacer element, and the light shield surrounds the optical axis.

37. The optical lens as claimed in claim 23 further includes a light-shielding plate, wherein the light-shielding plate is disposed between the spacer element and the sustaining element, and the light-shielding plate surrounds the optical axis.

38. The optical lens as claimed in claim 23, wherein the paraxial surface of the spacer element has an antireflective surface, and the reflectivity of the antireflective surface is lower than that of the offaxial surface.

39. The optical lens as claimed in claim 24, wherein the holding portion further comprises a stop surface, the spacer element further comprises a corresponding stop surface, the stop surface and the corresponding stop surface are disposed opposite to each other, and the distance between the corresponding stop surface and the stop surface gradually increases in a direction away from the second region; and wherein, Define a cross section parallel to and passing through the optical axis, where the stopping surface and the corresponding stopping surface have an angle A1 on the cross section, satisfying the following condition: A1 ≤ 20 degrees.

40. A camera module comprising: an optical lens as described in claim 23; and an electronic photosensitive element disposed on an imaging surface of the optical lens.

41. An electronic device comprising: a camera module as described in claim 40.

Images