Plastic lens and imaging lens

Abstract

A plastic lens and an imaging lens, the plastic lens includes an optical effective portion and a peripheral portion. The peripheral portion surrounds the optical effective portion and includes an outer edge surface and an optical detection structure. The optical detection structure is located between the optical effective portion and the outer edge surface and includes a first optical detection surface and a second optical detection surface, wherein the first optical detection surface and the second optical detection surface are respectively arranged on two sides of the peripheral portion and correspond to each other. Thus, a plastic lens capable of monitoring the assembly quality in real time is provided, thereby improving the yield and production of products.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a plastic lens and an imaging lens, and particularly to a plastic lens and an imaging lens with an optical detection structure. BACKGROUND

[0002] In recent years, portable electronic devices, such as smart electronic devices, tablet computers, etc., have been flooded in modern people's lives, and the imaging lenses and imaging lens assemblies loaded on the portable electronic devices have also developed rapidly. However, as technology continues to advance, users have increasingly high requirements for the quality of imaging lenses. However, in the existing imaging lens manufacturing process, only the appearance can be used to determine the assembly and the colloid setting of the imaging lens, and it is impossible to know whether there is assembly skew or incomplete colloid coating inside the imaging lens. Therefore, developing an imaging lens with miniaturization, good imaging effect, and high manufacturing yield has become an important and urgent problem in the industry. SUMMARY

[0003] The present disclosure provides a plastic lens and an imaging lens, which can instantly monitor the assembly quality of the plastic lens. The optical detection structure is directly arranged on the plastic lens through injection molding, achieving a fast and low-cost detection method.

[0004] According to an embodiment of the present disclosure, a plastic lens is provided, which includes an optical effective portion and a peripheral portion. The peripheral portion surrounds the optical effective portion and includes an outer edge surface and an optical detection structure. The optical detection structure is located between the optical effective portion and the outer edge surface and includes a first optical detection surface and a second optical detection surface, wherein the first optical detection surface and the second optical detection surface are respectively arranged on two sides of the peripheral portion and correspond to each other. The included angle between the first optical detection surface and the second optical detection surface is θi, the minimum thickness between the first optical detection surface and the second optical detection surface is IT, and the center thickness of the plastic lens is CT, which satisfy the following conditions: 30 degrees ≤ θi ≤ 60 degrees; and 0.2 < IT / CT < 1.4.

[0005] According to the plastic lens of the preceding embodiment, the minimum diameter of the second optical detection surface is ψi, and the maximum diameter of the outer edge surface is ψd, which satisfy the following condition: 0.80 < ψi / ψd < 0.99. In addition, it can satisfy the following condition: 0.85 ≤ ψi / ψd ≤ 0.96.

[0006] According to the plastic lens of the preceding embodiment, the optical effective portion can include at least one optical aspheric surface. In addition, the at least one optical aspheric surface can include at least one inflection point.

[0007] The plastic lens according to the preceding embodiment, wherein the peripheral portion further comprises an annular auxiliary surface, the annular auxiliary surface and the second optical detection surface are disposed on the same side, and the annular auxiliary surface forms an annular groove with the second optical detection surface.

[0008] The plastic lens according to the preceding embodiment, wherein the optical detection structure is closer to the peripheral surface than to the optically effective portion.

[0009] The plastic lens according to the preceding embodiment, further comprising a light-absorbing layer disposed on at least one of the two sides of the peripheral portion and between the optically effective portion and the optical detection structure.

[0010] The plastic lens according to the preceding embodiment, wherein the included angle between the first optical detection surface and the second optical detection surface is θi, the critical angle of total internal reflection of the plastic lens is θc, and the following condition is satisfied: θi > θc.

[0011] The plastic lens according to the preceding embodiment, wherein the refractive index of the plastic lens is Nd, and the following condition is satisfied: 1.50 < Nd < 1.75.

[0012] The plastic lens according to the preceding embodiment, wherein the included angle between the first optical detection surface and the second optical detection surface is θi, and the following condition is satisfied: 35 degrees ≤ θi ≤ 55 degrees.

[0013] The plastic lens according to the preceding embodiment, wherein the plastic lens is a two-color molded lens integrally made of transparent blocks and black blocks.

[0014] The plastic lens according to the preceding embodiment, wherein the first optical detection surface and the second optical detection surface are both smooth surfaces.

[0015] The plastic lens according to the preceding embodiment, wherein the minimum thickness between the first optical detection surface and the second optical detection surface is IT, and the following condition is satisfied: 0.1 mm < IT < 0.6 mm.

[0016] The plastic lens according to the preceding embodiment, wherein the minimum thickness between the first optical detection surface and the second optical detection surface is IT, and the central thickness of the plastic lens is CT, and the following condition is satisfied: 0.3 ≤ IT / CT ≤ 1.2.

[0017] An imaging lens according to an embodiment of the disclosure comprises a plastic lens barrel and an imaging lens group, the imaging lens group is accommodated in the plastic lens barrel, and comprises at least one plastic lens according to the preceding embodiment.

[0018] The imaging lens according to the preceding embodiment, wherein the peripheral portion further comprises two abutting surfaces, respectively disposed on the two sides of the peripheral portion, and the two abutting surfaces are substantially parallel to each other.

[0019] The imaging lens according to the preceding embodiment, wherein the first optical detection surface is one of the two abutting surfaces.

[0020] The imaging lens according to the preceding embodiment, wherein the peripheral portion further comprises an axial alignment structure for coaxially arranging the plastic lens with an adjacent imaging lens element.

[0021] The imaging lens according to the preceding embodiment, wherein the plastic lens barrel has at least one parallel inner annular surface, and a gap is formed between the outer edge surface of the plastic lens and the parallel inner annular surface of the plastic lens barrel; the imaging lens further comprises a gel disposed in the gap, and the gel connects the plastic lens and the plastic lens barrel.

[0022] The imaging lens according to the preceding embodiment, wherein the plastic lens barrel has a parallel inner annular surface, and the outer edge surface of the plastic lens and the parallel inner annular surface of the plastic lens barrel are cooperatively engaged.

[0023] The imaging lens according to the preceding embodiment, wherein the included angle between the first optical detection surface and the second optical detection surface is θi, and the following condition is satisfied: 35 degrees ≤ θi ≤ 55 degrees.

[0024] The imaging lens according to the preceding embodiment, wherein the refractive index of the plastic lens is Nd, and the following condition is satisfied: 1.50 < Nd < 1.75.

[0025] The imaging lens according to the preceding embodiment, wherein the included angle between the first optical detection surface and the second optical detection surface is θi, and the critical angle of total internal reflection of the plastic lens is θc, and the following condition is satisfied: θi > θc. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1A A schematic view of an imaging lens according to a first embodiment of the present disclosure is shown;

[0027] Figure 1B A schematic view of a plastic lens in the first embodiment is shown; Figure 1A

[0028] A schematic view of a plastic lens in the first embodiment is shown; Figure 1C Figure 1A A schematic view of a plastic lens in the first embodiment is shown;

[0029] Figure 1D A schematic view of a plastic lens in the first embodiment is shown; Figure 1A

[0030] A schematic view of a plastic lens in the first embodiment is shown; Figure 1E Figure 1A A partial sectional view of a plastic lens barrel and a plastic lens in the first embodiment is shown; ​​

[0031] Figure 1F Drawing according to Figure 1A A three-dimensional schematic diagram of the plastic lens in the first embodiment;

[0032] Figure 1G Drawing according to Figure 1A Another perspective view of the plastic lens in the first embodiment;

[0033] Figure 1H Drawing according to Figure 1A A schematic diagram of a case where the plastic lens is being tested in the first embodiment;

[0034] Figure 1I Drawing according to Figure 1A A schematic diagram of another scenario where the plastic lens is being tested in the first embodiment;

[0035] Figure 1J A schematic diagram illustrating an imaging lens according to a second embodiment of this disclosure;

[0036] Figure 1A Drawing according to Figure 1K A schematic diagram of the plastic lens in the second embodiment;

[0037] Figure 1A Drawing according to Figure 1L A schematic diagram of the plastic lens in the second embodiment;

[0038] Figure 1A Drawing according to Figure 1M A schematic diagram of the plastic lens in the second embodiment;

[0039] Figure 1A Drawing according to Figure 1N A schematic diagram of a case where the plastic lens is being tested in the second embodiment;

[0040] Figure 1A Drawing according to Figure 1O A schematic diagram of another scenario where the plastic lens is being tested in the second embodiment;

[0041] Figure 1A Drawing according to Figure 1P A schematic diagram of the plastic lens in the second embodiment;

[0042] Figure 1A Drawing according to Figure 1Q A partial cross-sectional view of the plastic lens barrel and plastic lens in the second embodiment;

[0043] Figure 1A Drawing according to Figure 1R A three-dimensional schematic diagram of the plastic lens in the second embodiment;

[0044] Figure 1A Drawing according to Figure 1SAnother perspective view of the plastic lens in the second embodiment;

[0045] Figure 1A A perspective view of an electronic device according to the second embodiment is shown; Figure 1T A perspective view of another condition of the plastic lens under inspection in the second embodiment is shown;

[0046] Figure 1A A perspective view of an electronic device according to the second embodiment is shown; Figure 1U A perspective view of another condition of the plastic lens under inspection in the second embodiment is shown;

[0047] Figure 1A A perspective view of an electronic device according to the third embodiment is shown;

[0048] Figure 1V A perspective view of an electronic device according to the third embodiment is shown; Figure 1A A block diagram of the electronic device in the third embodiment is shown;

[0049] Figure 1W A perspective view of an electronic device according to the third embodiment is shown; Figure 1A A perspective view of a selfie scene in the third embodiment is shown; and

[0050] Figure 1X A perspective view of an electronic device according to the third embodiment is shown; Figure 1A A perspective view of an electronic device according to the third embodiment is shown;

[0051]

Symbol Description

[0052] 100, 200, 31: imaging lens

[0053] 101, 201: plastic lens barrel

[0054] 102, 202: filter element

[0055] 103, 203: imaging surface

[0056] 1041, 1042, 1043, 2041, 2042, 2043, 2044: parallel inner annular surface

[0057] 1051, 1052, 1053, 2051, 2052, 2053: colloid

[0058] 109, 209, 31b: electronic photosensitive element

[0059] 110, 120, 130, 210, 220, 230, 240: plastic lens

[0060] 111, 121, 131, 211, 221, 231, 241: optically effective portion

[0061] 1111, 1112, 1211, 1212, 1311, 1312, 2111, 2112, 2211, 2212, 2311, 2312, 2411, 2412: inflection points

[0062] 112, 122, 132, 212, 222, 232, 242: outer edge surface

[0063] 1131, 1231, 1331, 2131, 2231, 2331, 2431: first optical detection surface

[0064] 1132, 1232, 1332, 2132, 2232, 2332, 2432: second optical detection surface

[0065] 114, 124, 134, 214, 224, 234, 244: annular auxiliary surface

[0066] 115, 1251, 1252, 135, 215, 2251, 2252, 235, 245: abutting surface

[0067] 116, 126, 136: light ray absorbing layer

[0068] 1171, 1172, 1271, 2171, 2172, 2271, 2272: axial alignment structure

[0069] 141, 142, 143, 144, 251, 252, 253, 254: imaging lens element

[0070] 2402: black block

[0071] 30: electronic device

[0072] 31a: imaging lens group

[0073] 32: user interface

[0074] 33: imaging signal processing element

[0075] 34: optical anti-shake assembly

[0076] 35: sensing element

[0077] 36: flash module

[0078] 37: focus assisting module

[0079] L1: detection image light

[0080] θi: included angle between the first optical detection surface and the second optical detection surface

[0081] θc: critical angle of total internal reflection of the plastic lens

[0082] ψi: minimum diameter of the second optical detection surface

[0083] ψd: maximum diameter of the outer peripheral surface

[0084] Nd: refractive index of the plastic lens

[0085] IT: minimum thickness between the first optical detection surface and the second optical detection surface

[0086] CT: center thickness of the plastic lens

[0087] A, B, C, D, E, F: portions DETAILED DESCRIPTION

[0088] The present disclosure provides a plastic lens, which includes an optically effective portion and a peripheral portion. The peripheral portion surrounds the optically effective portion and includes an outer peripheral surface and an optical detection structure. The optical detection structure is located between the optically effective portion and the outer peripheral surface and includes a first optical detection surface and a second optical detection surface, wherein the first optical detection surface and the second optical detection surface are respectively arranged on two sides of the peripheral portion and correspond to each other. In detail, the outer peripheral surface connects the two sides of the peripheral portion. Through the optical detection structure, the condition of the internal assembly of the imaging lens in which the plastic lens is arranged can be detected. After the detection is qualified, subsequent assembly processes are performed, thereby increasing the assembly yield and reducing material waste.

[0089] The included angle between the first optical detection surface and the second optical detection surface is θi, which satisfies the following condition: 30 degrees ≤ θi ≤ 60 degrees. In this way, the detection image light can be smoothly transmitted to the outside of the plastic lens, thereby providing the feasibility of optical detection.

[0090] Therefore, the present disclosure provides a plastic lens that can monitor the assembly quality in real time. The optical detection structure is directly arranged on the plastic lens through injection molding, thereby achieving a rapid and low-cost detection method and further improving the yield and production of the product.

[0091] In addition, the following condition can be satisfied: 35 degrees ≤ θi ≤ 55 degrees. In this way, the structure of total internal reflection can be more easily achieved, and shrinkage deformation is less likely to occur during molding.

[0092] The minimum diameter of the second optical detection surface is ψi, and the maximum diameter of the outer peripheral surface is ψd, which satisfy the following condition: 0.80 < ψi / ψd < 0.99. In this way, the optical detection structure can clearly reflect the image of the outer peripheral surface. In addition, the following condition can be satisfied: 0.85 ≤ ψi / ψd ≤ 0.96. In this way, the plastic lens has better molding efficiency.

[0093] The optical effective portion can include at least one optical aspheric surface. By this way, optical aberration can be reduced, and higher resolution can be provided. Furthermore, the optical aspheric surface can include at least one inflection point. By this way, the volume of the plastic lens can be reduced, and the image distortion during optical imaging can be reduced.

[0094] The peripheral portion can further include an annular auxiliary surface, which is disposed on the same side as the second optical detection surface and forms an annular groove with the second optical detection surface. By this way, the optical detection structure can maintain structural integrity during injection molding.

[0095] The optical detection structure is closer to the peripheral surface than to the optical effective portion. By this way, the information of the peripheral surface can be more completely monitored, and the dimensional accuracy of the optical effective portion can be maintained.

[0096] The plastic lens can further include a light-absorbing layer, which is disposed on at least one side of the peripheral portion between the optical effective portion and the optical detection structure. By this way, the probability of stray light generation can be reduced. In detail, the area between the optical effective portion and the optical detection structure is more prone to stray light generation, so the light-absorbing layer can be disposed between the optical effective portion and the optical detection structure. The light-absorbing layer can also be disposed on the annular auxiliary surface, which can be a black ink that can absorb non-imaging light, but the present disclosure is not limited thereto.

[0097] The included angle between the first optical detection surface and the second optical detection surface is θi, and the critical angle of total internal reflection of the plastic lens is θc, which satisfies the following condition: θi > θc. By this way, a clearer detection image can be provided, and the probability of misjudgment can be reduced. In detail, the plastic lens has a relationship between the critical angle of total internal reflection θc and the refractive index Nd: θc = sin -1 (1 / Nd), and the detection image light is transmitted by total internal reflection, which can reduce the energy loss of the detection image light, make the image comparison better, and make it easier to interpret, and there is no need to coat a reflective film.

[0098] Please refer to the following table, which discloses the data of the critical angle of total internal reflection and the refractive index of materials 1-20 (reference wavelength is 587.56 nm), and the plastic lens of the present disclosure can be made of any one of materials 1-20, but the present disclosure is not limited thereto.

[0099] Figure 1Y Figure 1A Figure 1Z Figure 1A 1.512 41.4 Figure 2A 1.535 40.7 Figure 2B 1.536 40.6 Figure 2A 1.544 40.4 Figure 2C 1.566 39.7 Figure 2A 1.585 39.1 Figure 2D 1.586 39.1 Figure 2A 1.588 39.0 Figure 2E 1.614 38.3 Figure 2A 1.614 38.3 Figure 2F 1.636 37.7 Figure 2A 1.640 37.6 Figure 2G 1.640 37.6 Figure 2A 1.644 37.5 Figure 2H 1.657 37.1 Figure 2A 1.661 37.0 Figure 2I 1.670 36.8 Figure 2A 1.680 36.5 Figure 2J 1.686 36.4 Figure 2A 1.705 35.9

[0100] The refractive index of the plastic lens is Nd, which satisfies the following condition: 1.50 < Nd < 1.75, wherein the refractive index is the refractive index under d light, and the d light wavelength is 587.56 nm. By this way, the refractive index range of total internal reflection can be more easily achieved.

[0101] The plastic lens can be a bicolored molded lens integrally formed by transparent blocks and black blocks. Specifically, the transparent blocks can allow visible light to pass through; the black blocks can allow infrared light to pass through, and the wavelength of the infrared light can be 700 nm to 1000 nm, but is not limited thereto. In this way, the light sources used for detection and imaging are separated, and the generation of stray light by the optical detection structure is directly prevented.

[0102] The first optical detection surface and the second optical detection surface can both be smooth surfaces. Specifically, the smooth surface refers to an optical surface with a roughness Ra less than 0.01 μm, which has a smaller scattering degree. In this way, the scattering of the detection image light is reduced, and image blurring is avoided.

[0103] The minimum thickness between the first optical detection surface and the second optical detection surface is IT, which satisfies the following condition: 0.1 mm < IT < 0.6 mm. In this way, the space occupied by the optical detection structure is reduced, and the size range of the small volume is maintained.

[0104] The minimum thickness between the first optical detection surface and the second optical detection surface is IT, and the center thickness of the plastic lens is CT, which satisfies the following condition: 0.2 < IT / CT < 1.4. In this way, a size range of the center and periphery forming manufacturability of the plastic lens is provided. In addition, the following condition can be satisfied: 0.3 ≤ IT / CT ≤ 1.2. In this way, a thickness ratio with better plastic forming fluidity is achieved.

[0105] The present disclosure provides an imaging lens, which includes a plastic lens barrel and an imaging lens group. The imaging lens group is accommodated in the plastic lens barrel and includes at least one of the aforementioned plastic lenses. In this way, assembly detection of the plastic lens is provided when the imaging lens is assembled, and an imaging lens with better stability and better imaging quality is achieved.

[0106] The outer peripheral portion can further include two abutting surfaces, which are respectively arranged on the two sides of the outer peripheral portion and are substantially parallel to each other. In this way, a reference surface for assembly is provided, and the spacing of each element is maintained. Specifically, the abutting surface is used to abut with an adjacent optical element, wherein the adjacent optical element can be an imaging lens element, a light shielding piece, a spacer ring, or a fixing ring, but the present disclosure is not limited thereto.

[0107] The first optical detection surface can be one of the two abutting surfaces. In this way, the detection and the lapping configuration share the same plane, and the space configuration can be saved.

[0108] The outer peripheral portion can further include an axial alignment structure, which is used to coaxially arrange the plastic lens and an adjacent imaging lens element. In this way, better coaxiality is provided, and the spacing between the plastic lens and the plastic lens barrel is maintained, which is beneficial to improving the uniformity of the glue coating.

[0109] The plastic lens barrel has at least one parallel inner surface, and a gap is formed between the outer surface of the plastic lens and the parallel inner surface of the plastic lens barrel. The imaging lens can further include an adhesive disposed in the gap and connecting the plastic lens and the plastic lens barrel. In this way, the structural stability of the plastic lens assembly is enhanced, and the optical quality of the lens is maintained. In detail, the adhesive can be a colorless material or a black material, which can provide the effects of stabilizing the element and shielding non-imaging light according to requirements. An optical detection structure can detect the completeness of the adhesive coating on the outer surface.

[0110] The plastic lens barrel has a parallel inner surface, and the outer surface of the plastic lens and the parallel inner surface of the plastic lens barrel are matched and overlapped. By controlling the size accuracy, the plastic lens has better centering, and the optical quality of the imaging lens is maintained. In addition, an optical detection structure can detect the decentering and tilting of the plastic lens and the plastic lens barrel.

[0111] The included angle between the first optical detection surface and the second optical detection surface is θi, which satisfies the following condition: 35 degrees ≤ θi ≤ 55 degrees. In this way, it is easier to achieve a total internal reflection structure, and it is also less likely to produce shrinkage deformation during molding.

[0112] The refractive index of the plastic lens is Nd, which satisfies the following condition: 1.50 < Nd < 1.75. In this way, it is easier to achieve a total internal reflection refractive index range.

[0113] The included angle between the first optical detection surface and the second optical detection surface is θi, and the critical angle of the total internal reflection of the plastic lens is θc, which satisfies the following condition: θi > θc. In this way, a clearer detection image is provided to reduce the probability of misjudgment.

[0114] According to the above embodiments, the following specific examples are proposed in detail with reference to the accompanying drawings.

[0115] <First embodiment>

[0116] Please refer to Figure 2K , which is a schematic diagram illustrating an imaging lens 100 according to the first embodiment of the present disclosure. As shown in Figure 2A , the imaging lens 100 includes a plastic lens barrel 101 and an imaging lens group (not labeled separately), and the imaging lens group is accommodated in the plastic lens barrel 101. In addition, the imaging lens 100 can further include a filter element 102 and an electronic photosensitive element 109, the filter element 102 is disposed between the imaging lens group and an imaging surface 103, and the electronic photosensitive element 109 is disposed on the imaging surface 103.

[0117] The imaging lens assembly, from the object side to the image side, includes imaging lens elements 141, 142, and 143, plastic lenses 110, 120, and 130, and imaging lens element 144. Additionally, optical elements such as light-shielding plates, spacers, or fixing rings can be provided between adjacent imaging lens elements and plastic lenses as needed; these will not be further indicated or described here.

[0118] Reference Figure 2L Its drawing is based on Figure 2A A schematic diagram of the plastic lens 110 in the first embodiment. (From...) Figure 2M As can be seen, the plastic lens 110 includes an optically active portion 111 and an outer peripheral portion (not otherwise labeled). The outer peripheral portion surrounds the optically active portion 111 and includes an outer edge surface 112, an optical detection structure (not otherwise labeled), and an annular auxiliary surface 114. The optical detection structure is located between the optically active portion 111 and the outer edge surface 112, and includes a first optical detection surface 1131 and a second optical detection surface 1132, wherein the first optical detection surface 1131 and the second optical detection surface 1132 are respectively disposed on two sides of the outer peripheral portion and correspond to each other. The annular auxiliary surface 114 is disposed on the same side as the second optical detection surface 1132 and forms an annular groove with the second optical detection surface 1132.

[0119] The optical effective portion 111 includes two optical aspherical surfaces (i.e., both the object-side surface and the image-side surface are optical aspherical surfaces), and each optical aspherical surface includes at least one inflection point 1111, 1112. In the plastic lens 110, the optical detection structure is closer to the outer edge surface 112 than the optical effective portion 111. The first optical detection surface 1131 and the second optical detection surface 1132 are both smooth surfaces. In addition, the outer peripheral portion may also include two bearing surfaces, which are respectively disposed on two sides of the outer peripheral portion, and the two bearing surfaces are substantially parallel to each other; in detail, in the plastic lens 110, one bearing surface is the bearing surface 115, and the other bearing surface is the first optical detection surface 1131. Furthermore, the plastic lens 110 may also include a light-absorbing layer 116 disposed on at least one side (i.e., the object side) of the outer periphery and located between the optical effective part 111 and the optical detection structure; specifically, the light-absorbing layer 116 of the plastic lens 110 is disposed on the annular auxiliary surface 114.

[0120] Depend on Figure 2A It can be seen that the angle between the first optical detection surface 1131 and the second optical detection surface 1132 is θi, the minimum diameter of the second optical detection surface 1132 is ψi, the maximum diameter of the outer edge surface 112 is ψd, the critical angle for total internal reflection of the plastic lens 110 is θc, the refractive index of the plastic lens is Nd, the minimum thickness between the first optical detection surface 1131 and the second optical detection surface 1132 is IT, and the center thickness of the plastic lens 110 is CT, which satisfies the conditions in the table below.

[0121]

[0122] In addition, the plastic lens 110 satisfies θi>θc.

[0123] Reference Figure 2N Its drawing is based on Figure 2A A schematic diagram of the plastic lens 120 in the first embodiment. (From...) Figure 2O As can be seen, the plastic lens 120 includes an optically active portion 121 and an outer peripheral portion (not otherwise labeled). The outer peripheral portion surrounds the optically active portion 121 and includes an outer edge surface 122, an optical detection structure (not otherwise labeled), and an annular auxiliary surface 124. The optical detection structure is located between the optically active portion 121 and the outer edge surface 122, and includes a first optical detection surface 1231 and a second optical detection surface 1232, wherein the first optical detection surface 1231 and the second optical detection surface 1232 are respectively disposed on two sides of the outer peripheral portion and correspond to each other. The annular auxiliary surface 124 is disposed on the same side as the second optical detection surface 1232 and forms an annular groove with the second optical detection surface 1232.

[0124] The optical effective portion 121 includes two optical aspherical surfaces (i.e., both the object-side surface and the image-side surface are optical aspherical surfaces), and each optical aspherical surface includes at least one inflection point 1211, 1212. In the plastic lens 120, the optical detection structure is closer to the outer edge surface 122 than the optical effective portion 121. The first optical detection surface 1231 and the second optical detection surface 1232 are both smooth surfaces. In addition, the outer periphery may also include two bearing surfaces, which are respectively disposed on two sides of the outer periphery, and the two bearing surfaces are substantially parallel to each other; in detail, in the plastic lens 120, one bearing surface is bearing surface 1251, and the other bearing surface is bearing surface 1252. Furthermore, the plastic lens 120 may also include a light absorption layer 126, which is disposed on at least one side (i.e., the image side) of the outer periphery and is located between the optical effective portion 121 and the optical detection structure.

[0125] Furthermore, cooperation Figure 2A As can be seen, the plastic lens 120 meets the conditions in the table below. The relevant parameter definitions are the same as those of the aforementioned plastic lens 110, and will not be repeated here.

[0126]

[0127] Reference Figure 2P Its drawing is based on Figure 2A A schematic diagram of the plastic lens 130 in the first embodiment. (From...) Figure 2QThe plastic lens 130 includes an optical effective portion 131 and a peripheral portion (not labeled separately), which surrounds the optical effective portion 131 and includes an outer edge surface 132, an optical detection structure (not labeled separately), and an annular auxiliary surface 134. The optical detection structure is located between the optical effective portion 131 and the outer edge surface 132 and includes a first optical detection surface 1331 and a second optical detection surface 1332, wherein the first optical detection surface 1331 and the second optical detection surface 1332 are respectively arranged on two sides of the peripheral portion and correspond to each other. The annular auxiliary surface 134 and the second optical detection surface 1332 are arranged on the same side and form an annular groove with the second optical detection surface 1332.

[0128] The optical effective portion 131 includes two optical aspheric surfaces (i.e., both the object side surface and the image side surface are optical aspheric surfaces), and each optical aspheric surface includes at least one inflection point 1311, 1312. In the plastic lens 130, the optical detection structure is closer to the outer edge surface 132 than the optical effective portion 131 and the outer edge surface 132. The first optical detection surface 1331 and the second optical detection surface 1332 are both smooth surfaces. In addition, the peripheral portion can further include two abutting surfaces, which are respectively arranged on two sides of the peripheral portion and are substantially parallel to each other; in detail, in the plastic lens 130, one abutting surface is the abutting surface 135, and the other abutting surface is the first optical detection surface 1331. Furthermore, the plastic lens 130 can further include a light absorbing layer 136, which is arranged on at least one side (i.e., the image side) of the two sides of the peripheral portion and is located between the optical effective portion 131 and the optical detection structure.

[0129] Furthermore, in combination with Figure 2A It can be seen that the plastic lens 130 satisfies the following table conditions, and the definitions of the related parameters are the same as those of the plastic lens 110 described above, which will not be described again.

[0130]

[0131] In combination with the above Figure 2R The peripheral portion of the plastic lens 110 can further include two axial alignment structures 1171, 1172, which are respectively located on the object side and the image side of the plastic lens 110. The peripheral portion of the plastic lens 120 can further include an axial alignment structure 1271, which is located on the object side of the plastic lens 120. The axial alignment structure 1171 is used to coaxially arrange the plastic lens 110 and the adjacent imaging lens element 143. The axial alignment structure 1172 is used to coaxially arrange the plastic lens 110 and the adjacent imaging lens element (i.e., the plastic lens 120), that is, to overlap with the axial alignment structure 1271 of the plastic lens 120.

[0132] In combination with the above Figure 2A which illustrates the partial cross-sectional view of the plastic lens barrel 101 and the plastic lens 130 according to Figure 2S The plastic lens barrel 101 and the plastic lens 130 in the first embodiment. As shown inFigure 2A As shown in FIG. 1, the plastic lens 130 is disposed in the plastic lens barrel 101. The plastic lens barrel 101 has parallel inner annular surfaces 1041, 1042, 1043. The outer edge surface 132 of the plastic lens 130 and the parallel inner annular surfaces 1041, 1042, 1043 of the plastic lens barrel 101 form a gap (not labeled). The imaging lens 100 can further include a gel 1051, 1052, 1053 disposed in the gap and connecting the plastic lens 130 and the plastic lens barrel 101.

[0133] By reference to Figure 2T , Figure 2A , Figure 2U and Figure 2A , it is shown that the detection image light L1 enters from the outer edge surface 132 and is totally internally reflected by the second optical detection surface 1332 to the first optical detection surface 1331 and penetrates out of the first optical detection surface 1331. Then, the detection image light L1 can be captured by an image detector and analyzed for image detection. By observing from the first optical detection surface 1331 to the second optical detection surface 1332, a virtual image of the outer edge surface 132 can be observed and the medium in contact with the outer edge surface 132 can be directly seen. Figure 2V A perspective view of the plastic lens 130 according to the first embodiment is shown in FIG. 2. Figure 2A Another perspective view of the plastic lens 130 according to the first embodiment is shown in FIG. 3. Figure 2W A schematic view of a situation under detection of the plastic lens 130 according to the first embodiment is shown in FIG. 4. Figure 2A Another schematic view of another situation under detection of the plastic lens 130 according to the first embodiment is shown in FIG. 5. As shown in FIG. 4 and FIG. 5, Figure 2X Figure 2A Figure 2Y Figure 2A As shown in FIG. 4 and FIG. 5, the detection image light L1 enters from the outer edge surface 132 and is totally internally reflected by the second optical detection surface 1332 to the first optical detection surface 1331 and penetrates out of the first optical detection surface 1331. Then, the detection image light L1 can be captured by an image detector and analyzed for image detection. By observing from the first optical detection surface 1331 to the second optical detection surface 1332, a virtual image of the outer edge surface 132 can be observed and the medium in contact with the outer edge surface 132 can be directly seen. Figure 2Z Figure 2A Figure 3A As shown in FIG. 4, the portion A indicates that the outer edge surface 132 is completely in contact with the gel 1053, which means that the assembly is qualified. As shown in FIG. 5, Figure 3B Figure 3A As shown in FIG. 5, the portion A indicates that the outer edge surface 132 is in contact with the gel 1053, and the portion B indicates that the outer edge surface 132 is not in contact with the gel 1053 (which means that there is an air gap between the outer edge surface 132 of the plastic lens 130 and the plastic lens barrel 101), which means that the assembly needs to be adjusted and corrected. In this way, the state of the gel coating between the outer edge surface 132 and the plastic lens barrel 101 can be detected to evaluate whether the gel is insufficient or unevenly coated, and further adjustment and correction can be made.

[0134] <Second Embodiment>

[0135] Please refer to​​​​​​Figure 3A Fig. 2 is a schematic diagram illustrating an imaging lens 200 according to a second embodiment of the present disclosure. As shown in Fig. 2, the imaging lens 200 comprises a plastic lens barrel 201 and an imaging lens group (not labeled separately), which is accommodated in the plastic lens barrel 201. In addition, the imaging lens 200 can further comprise a filter element 202 arranged between the imaging lens group and an imaging surface 203. Figure 3B As shown in Fig. 2, the imaging lens 200 comprises the plastic lens barrel 201 and the imaging lens group (not labeled separately), which is accommodated in the plastic lens barrel 201. In addition, the imaging lens 200 can further comprise a filter element 202 arranged between the imaging lens group and an imaging surface 203.

[0136] The imaging lens group comprises, from the object side to the image side, an imaging lens element 251, an imaging lens element 252, a plastic lens 210, a plastic lens 220, an imaging lens element 253, an imaging lens element 254, a plastic lens 230, and a plastic lens 240. In addition, between adjacent imaging lens elements and plastic lenses in the imaging lens group, optical elements such as light-shielding sheets, spacer rings, or fixing rings can be arranged as required, which are not labeled and described herein.

[0137] In combination with reference to Figure 3C Fig. 4 is a schematic diagram illustrating the plastic lens 210 according to the second embodiment of the present disclosure. As shown in Fig. 4, the plastic lens 210 comprises an optically effective portion 211 and a peripheral portion (not labeled separately), which surrounds the optically effective portion 211 and comprises an outer edge surface 212, an optical detection structure (not labeled separately), and an annular auxiliary surface 214. The optical detection structure is located between the optically effective portion 211 and the outer edge surface 212 and comprises a first optical detection surface 2131 and a second optical detection surface 2132, wherein the first optical detection surface 2131 and the second optical detection surface 2132 are arranged on two sides of the peripheral portion, respectively, and correspond to each other. The annular auxiliary surface 214 and the second optical detection surface 2132 are arranged on the same side and form an annular groove with the second optical detection surface 2132. Figure 3A Figure 3D As shown in Fig. 4, the plastic lens 210 comprises the optically effective portion 211 and the peripheral portion (not labeled separately), which surrounds the optically effective portion 211 and comprises the outer edge surface 212, the optical detection structure (not labeled separately), and the annular auxiliary surface 214. The optical detection structure is located between the optically effective portion 211 and the outer edge surface 212 and comprises the first optical detection surface 2131 and the second optical detection surface 2132, wherein the first optical detection surface 2131 and the second optical detection surface 2132 are arranged on two sides of the peripheral portion, respectively, and correspond to each other. The annular auxiliary surface 214 and the second optical detection surface 2132 are arranged on the same side and form an annular groove with the second optical detection surface 2132.

[0138] The optically effective portion 211 comprises two optical aspherical surfaces (i.e., both the object-side surface and the image-side surface are optical aspherical surfaces), and each optical aspherical surface comprises at least one inflection point 2111, 2112. In the plastic lens 210, the optical detection structure is closer to the outer edge surface 212 than to the optically effective portion 211. The first optical detection surface 2131 and the second optical detection surface 2132 are both smooth surfaces. In addition, the peripheral portion can further comprise two bearing surfaces arranged on two sides of the peripheral portion, respectively, and the two bearing surfaces are substantially parallel to each other; in detail, for the plastic lens 210, one bearing surface is the bearing surface 215, and the other bearing surface is the first optical detection surface 2131.

[0139] In combination with reference to Figure 3A As shown in Fig. 4, the plastic lens 210 satisfies the following table conditions, and the definitions of the related parameters are the same as those of the plastic lens 110 described above, which are not described herein.

[0140] ​

[0141] Reference Figure 3A Its drawing is based on Figure 3D A schematic diagram of the plastic lens 220 in the second embodiment. (From...) Figure 3D As can be seen, the plastic lens 220 includes an optically active portion 221 and an outer peripheral portion (not otherwise labeled). The outer peripheral portion surrounds the optically active portion 221 and includes an outer edge surface 222, an optical detection structure (not otherwise labeled), and an annular auxiliary surface 224. The optical detection structure is located between the optically active portion 221 and the outer edge surface 222, and includes a first optical detection surface 2231 and a second optical detection surface 2232. The first optical detection surface 2231 and the second optical detection surface 2232 are respectively disposed on two sides of the outer peripheral portion and correspond to each other. The annular auxiliary surface 224 is disposed on the same side as the second optical detection surface 2232 and forms an annular groove with the second optical detection surface 2232.

[0142] The optical effective portion 221 includes two optical aspherical surfaces (i.e., both the object-side surface and the image-side surface are optical aspherical surfaces), and each optical aspherical surface includes at least one inflection point 2211, 2212. In the plastic lens 220, the optical detection structure is closer to the outer edge surface 222 than the optical effective portion 221. Both the first optical detection surface 2231 and the second optical detection surface 2232 are smooth surfaces. In addition, the outer peripheral portion may also include two bearing surfaces, which are respectively disposed on two sides of the outer peripheral portion, and the two bearing surfaces are substantially parallel to each other; in detail, in the plastic lens 220, one bearing surface is bearing surface 2251, and the other bearing surface is bearing surface 2252.

[0143] Furthermore, cooperation ​ As can be seen, the plastic lens 220 meets the conditions in the table below. The relevant parameter definitions are the same as those of the aforementioned plastic lens 110, and will not be repeated here.

[0144]

[0145]

[0146] Reference ​ Its drawing is based on ​ A schematic diagram of the plastic lens 230 in the second embodiment. (From...) ​As can be seen, the plastic lens 230 includes an optically active portion 231 and an outer peripheral portion (not otherwise labeled). The outer peripheral portion surrounds the optically active portion 231 and includes an outer edge surface 232, an optical detection structure (not otherwise labeled), and an annular auxiliary surface 234. The optical detection structure is located between the optically active portion 231 and the outer edge surface 232, and includes a first optical detection surface 2331 and a second optical detection surface 2332. The first optical detection surface 2331 and the second optical detection surface 2332 are respectively disposed on two sides of the outer peripheral portion and correspond to each other. The annular auxiliary surface 234 is disposed on the same side as the second optical detection surface 2332 and forms an annular groove with the second optical detection surface 2332.

[0147] The optical effective portion 231 includes two optical aspherical surfaces (i.e., both the object-side surface and the image-side surface are optical aspherical surfaces), and each optical aspherical surface includes at least one inflection point 2311, 2312. In the plastic lens 230, the optical detection structure is closer to the outer edge surface 232 than the optical effective portion 231. Both the first optical detection surface 2331 and the second optical detection surface 2332 are smooth surfaces. In addition, the outer periphery may also include two bearing surfaces, which are respectively disposed on two sides of the outer periphery, and the two bearing surfaces are substantially parallel to each other; in detail, in the plastic lens 230, one bearing surface is the bearing surface 235, and the other bearing surface is the first optical detection surface 2331.

[0148] Furthermore, cooperation ​ As can be seen, the plastic lens 230 meets the conditions in the table below. The relevant parameter definitions are the same as those of the aforementioned plastic lens 110, and will not be repeated here.

[0149]

[0150] Reference ​ as well as ​ ,in ​ Drawing according to ​ A schematic diagram of a scenario where the plastic lens 230 is being tested in the second embodiment. ​ Drawing according to ​ A schematic diagram of another scenario where the plastic lens 230 is being tested, as shown in the second embodiment. Please refer to... ​ The plastic lens barrel 201 has parallel inner annular surfaces 2041, 2042, 2043, and 2044, wherein the outer edge surface 232 of the plastic lens 230 and the parallel inner annular surface 2043 of the plastic lens barrel 201 are mutually engaged and overlapped. ​ It can be seen that part C indicates that the outer edge surface 232 is completely mated and overlapped with the parallel inner ring surface 2043 of the plastic lens barrel 201, which can be judged as a qualified assembly result. ​As can be seen, part C indicates that the outer edge surface 232 and the parallel inner ring surface 2043 of the plastic lens barrel 201 are observably mated and overlapped, while part D indicates the area where the outer edge surface 232 does not mat with the parallel inner ring surface 2043 of the plastic lens barrel 201, which is determined to be an assembly result that requires adjustment and correction. Therefore, by checking the fit between the outer edge surface 232 and the parallel inner ring surface 2043 of the plastic lens barrel 201, the system assesses whether the plastic lens 230 is misaligned and makes further adjustments and corrections.

[0151] Reference ​ Its drawing is based on ​ A schematic diagram of the plastic lens 240 in the second embodiment. (From...) ​ As can be seen, the plastic lens 240 includes an optically active portion 241 and an outer peripheral portion (not otherwise labeled). The outer peripheral portion surrounds the optically active portion 241 and includes an outer edge surface 242, an optical detection structure (not otherwise labeled), and an annular auxiliary surface 244. The optical detection structure is located between the optically active portion 241 and the outer edge surface 242, and includes a first optical detection surface 2431 and a second optical detection surface 2432. The first optical detection surface 2431 and the second optical detection surface 2432 are respectively disposed on two sides of the outer peripheral portion and correspond to each other. The annular auxiliary surface 244 is disposed on the same side as the second optical detection surface 2432 and forms an annular groove with the second optical detection surface 2432.

[0152] The optical effective portion 241 includes two optical aspherical surfaces (i.e., both the object-side surface and the image-side surface are optical aspherical), and each optical aspherical surface includes at least one inflection point 2411, 2412. In the plastic lens 240, the optical detection structure is closer to the outer edge surface 242 than the optical effective portion 241. Both the first optical detection surface 2431 and the second optical detection surface 2432 are smooth surfaces. In addition, the outer peripheral portion may also include a bearing surface 245 disposed on the object side of the outer peripheral portion. Furthermore, the plastic lens 240 is a bichromatic molded lens, integrally formed from a transparent block (not otherwise indicated) and a black block 2402. Specifically, the transparent block is the optical effective portion 241 and a portion of the outer peripheral portion, and the black block 2402 is another portion of the outer peripheral portion, but this is not a limitation.

[0153] Furthermore, cooperation ​ As can be seen, the plastic lens 240 meets the conditions in the table below. The relevant parameter definitions are the same as those of the aforementioned plastic lens 110, and will not be repeated here.

[0154]

[0155] Reference ​The outer periphery of the plastic lens 210 can further include two axial alignment structures 2171, 2172 located on the object side and the image side of the plastic lens 210, respectively. The outer periphery of the plastic lens 220 can further include two axial alignment structures 2271, 2272 located on the object side and the image side of the plastic lens 220, respectively. The axial alignment structure 2171 is used to coaxially arrange the plastic lens 210 with the adjacent imaging lens element 252. The axial alignment structure 2172 is used to coaxially arrange the plastic lens 210 with the adjacent imaging lens element (i.e. the plastic lens 220), that is, to overlap with the axial alignment structure 2271 of the plastic lens 220. The axial alignment structure 2272 is used to coaxially arrange the plastic lens 220 with the adjacent imaging lens element 253.

[0156] By ​ , ​ , ​ , ​ It can be seen that the outer edge surface 212, 222, 242 of the plastic lens 210, 220, 240 respectively forms a gap (not labeled separately) with the parallel inner annular surface 2041, 2042, 2044 of the plastic lens barrel 201. The imaging lens 200 can further include a colloid 2051, 2052, 2053 arranged in the gap, and the colloid 2051, 2052, 2053 is connected to the plastic lens 210, 220, 240 and the plastic lens barrel 201, respectively.

[0157] For reference ​ , ​ , ​ , ​ And ​ Among them ​ Draws a partial cross-sectional view of the plastic lens barrel 201 and the plastic lens 240 according to ​ The second embodiment, ​ Draws a perspective view of the plastic lens 240 according to ​ The second embodiment, ​ Draws another perspective view of the plastic lens 240 according to ​ The second embodiment, ​ Draws a schematic diagram of a situation detected for the plastic lens 240 according to ​ The second embodiment, ​ Draws another schematic diagram of a situation detected for the plastic lens 240 according to ​ The second embodiment. By ​ , ​ , ​ , ​ , ​ And ​It can be seen that the plastic lens 240 is a bicolor molded lens, and the optical detection structure is set on the black block 2402. Since the black block 2402 is permeable to infrared light, the detection image ray L1 can be infrared light. ​ It can be seen that location E indicates that the outer edge surface 242 is in complete contact with the colloid 2053, which can be judged as a qualified assembly result. ​ It can be seen that part E indicates that the outer edge surface 242 is in contact with the colloid 2053, while part F indicates that the outer edge surface 242 is not in contact with the colloid 2053 (indicating that there is an air gap between the outer edge surface 242 of the plastic lens 240 and the plastic lens barrel 201). Therefore, it is determined that the assembly result needs to be adjusted and corrected.

[0158] <Third Embodiment>

[0159] ​ A schematic diagram of the electronic device 30 according to the third embodiment of this disclosure is shown. ​ Drawing according to ​ A block diagram of the electronic device 30 in the third embodiment. ​ and ​ As can be seen, the electronic device 30 is a smartphone and includes an imaging lens 31, wherein the imaging lens 31 includes an imaging lens group 31a, an electronic photosensitive element 31b, and a plastic lens barrel (not shown). In the third embodiment, the imaging lens 31 is disposed in the area on the side of the user interface 32, and the electronic photosensitive element 31b is disposed on the imaging surface of the imaging lens 31 (not shown). The user interface 32 may be a touch screen or a display screen, and is not limited thereto. The imaging lens 31 may be any of the aforementioned first to second embodiments, but the present disclosure is not limited thereto.

[0160] Furthermore, the user enters the shooting mode through the user interface 32 of the electronic device 30. At this time, the imaging lens 31 gathers the imaging light onto the electronic photosensitive element 31b and outputs the relevant electronic signal of the image to the image signal processing element (ISP) 33.

[0161] In response to the camera specifications of the electronic device 30, the electronic device 30 can further include an optical image stabilization (OIS) module 34, which can be an OIS anti-shake feedback device. Further, the electronic device 30 can further include at least one auxiliary optical element (not labeled separately) and at least one sensing element 35. In the third embodiment, the auxiliary optical elements are a flash module 36 and a focus-assisting module 37. The flash module 36 can be used to compensate for color temperature, and the focus-assisting module 37 can be an infrared ranging element, a laser focus module, or the like. The sensing element 35 can have the function of sensing physical momentum and action energy, such as an accelerometer, a gyroscope, a Hall Effect element, to sense the shaking and jitter applied by the user's hand or the external environment, thereby facilitating the automatic focusing function of the imaging lens 31 and the operation of the optical image stabilization module 34 in the electronic device 30, to obtain good imaging quality, and helping the electronic device 30 according to the present disclosure to have multiple modes of shooting functions, such as optimized selfie, low-light source HDR (High Dynamic Range) imaging, high-resolution 4K (4K Resolution) video recording, and the like. In addition, the user can directly view the shooting image of the camera on the touch screen and manually operate the framing range on the touch screen to achieve the auto-focus function of what you see is what you get.

[0162] In addition, the electronic device 30 can further include, but is not limited to, a display unit (Display), a control unit (Control Unit), a storage unit (Storage Unit), a random access memory (RAM), a read-only memory (ROM), or a combination thereof.

[0163] ​ A schematic diagram of a selfie scene according to the third embodiment is shown in ​ A schematic diagram of a selfie scene according to the third embodiment is shown in ​ A schematic diagram of a selfie scene according to the third embodiment is shown in ​ A schematic diagram of a selfie scene according to the third embodiment is shown in ​ It can be seen that the imaging lens 31 and the user interface 32 are both directed towards the user, and when taking a selfie or live streaming, the user can simultaneously watch the shooting image and perform the interface operation, and after shooting, the user can obtain the shooting image as shown in ​ Therefore, the imaging lens 31 according to the present disclosure can provide a better shooting experience.

[0164] Although the present disclosure has been disclosed with the above embodiments, it is not intended to limit the present disclosure, and anyone with ordinary knowledge in the art can make some modifications and refinements without departing from the spirit and scope of the present disclosure, and the protection scope of the present disclosure shall be subject to the scope defined by the appended claims.

Claims

1. A plastic lens characterized by, Comprising: an optically effective portion; and a peripheral portion surrounding the optically effective portion, the peripheral portion comprising: an outer edge surface; and an optical detection structure located between the optically effective portion and the outer edge surface and comprising a first optical detection surface and a second optical detection surface, wherein the first optical detection surface and the second optical detection surface are respectively arranged on two sides of the peripheral portion and correspond to each other; wherein an included angle between the first optical detection surface and the second optical detection surface is θi, a minimum thickness between the first optical detection surface and the second optical detection surface is IT, a central thickness of the plastic lens is CT, and the following conditions are satisfied: 30 degrees ≤ θi ≤ 60 degrees; and 0.2 < IT / CT < 1.

4.

2. The plastic lens of claim 1, wherein A minimum diameter of the second optical detection surface is ψi, and a maximum diameter of the outer edge surface is ψd, and the following condition is satisfied: 0.80 < ψi / ψd < 0.

99.

3. The plastic lens of claim 2, wherein A minimum diameter of the second optical detection surface is ψi, and a maximum diameter of the outer edge surface is ψd, and the following condition is satisfied: 0.85 ≤ ψi / ψd ≤ 0.

96.

4. The plastic lens of claim 1, wherein The optically effective portion comprises at least one optical aspheric surface.

5. The plastic lens of claim 4, wherein The at least one optical aspheric surface comprises at least one inflection point.

6. The plastic lens of claim 1, wherein The peripheral portion further comprises an annular auxiliary surface, the annular auxiliary surface and the second optical detection surface are arranged on the same side, and form an annular groove with the second optical detection surface.

7. The plastic lens of claim 1, wherein The optical detection structure is closer to the outer edge surface with respect to the optically effective portion and the outer edge surface.

8. The plastic lens of claim 7, wherein Further comprising: a light-absorbing layer arranged on at least one of the two sides of the peripheral portion and located between the optically effective portion and the optical detection structure.

9. The plastic lens of claim 1, wherein An included angle between the first optical detection surface and the second optical detection surface is θi, and a critical angle of total internal reflection of the plastic lens is θc, and the following condition is satisfied: θi > θc.

10. The plastic lens of claim 1, wherein A refractive index of the plastic lens is Nd, and the following condition is satisfied: 1.50 < Nd < 1.

75.

11. The plastic lens of claim 1, wherein An included angle between the first optical detection surface and the second optical detection surface is θi, and the following condition is satisfied: 35 degrees ≤ θi ≤ 55 degrees.

12. The plastic lens of claim 1, wherein The plastic lens is a two-color molded lens integrally made of a transparent block and a black block.

13. The plastic lens of claim 1, wherein The first optical detection surface and the second optical detection surface are both smooth surfaces.

14. The plastic lens of claim 1, wherein A minimum thickness between the first optical detection surface and the second optical detection surface is IT, and the following condition is satisfied: 0.1 mm < IT < 0.6 mm.

15. The plastic lens of claim 1, wherein A minimum thickness between the first optical detection surface and the second optical detection surface is IT, and a central thickness of the plastic lens is CT, and the following condition is satisfied: 0.3 ≤ IT / CT ≤ 1.

2.

16. An imaging lens characterized by comprising, in order from the object, Comprising: a plastic lens barrel; and an imaging lens group accommodated in the plastic lens barrel and comprising at least one plastic lens as claimed in claim 1.

17. The imaging lens according to claim 16, characterized in that, The peripheral portion further comprises two abutting surfaces respectively arranged on the two sides of the peripheral portion, and the two abutting surfaces are substantially parallel to each other.

18. The imaging lens according to claim 17, characterized in that, The first optical detection surface is one of the two abutting surfaces.

19. The imaging lens according to claim 17, characterized in that, The peripheral portion further comprises an axial alignment structure for coaxially arranging the plastic lens and an adjacent imaging lens element.

20. The imaging lens according to claim 16, characterized in that, The plastic lens barrel has at least one parallel inner annular surface, and a gap is formed between the outer edge surface of the plastic lens and the parallel inner annular surface of the plastic lens barrel; the imaging lens further comprises a glue body arranged in the gap, and the glue body connects the plastic lens and the plastic lens barrel.

21. The imaging lens according to claim 16, characterized in that, The plastic lens barrel has a parallel inner annular surface, and the outer edge surface of the plastic lens and the parallel inner annular surface of the plastic lens barrel are matched and overlapped with each other.

22. The imaging lens according to claim 16, characterized in that, An included angle between the first optical detection surface and the second optical detection surface is θi, which satisfies the following condition: 35 degrees≤θi≤55 degrees.

23. The imaging lens according to claim 16, characterized in that, A refractive index of the plastic lens is Nd, which satisfies the following condition: 1.50<Nd<1.

75.

24. The imaging lens according to claim 16, characterized in that, An included angle between the first optical detection surface and the second optical detection surface is θi, and a total internal reflection critical angle of the plastic lens is θc, which satisfies the following condition: θi>θc.

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