Folding plastic optical element, imaging lens module and electronic device

Abstract

Optical plastic folding element (110) comprising: an incident surface (111), wherein light enters the optical plastic folding element (110) through the incident surface (111); at least one reflective surface (112), wherein the at least one reflective surface (112) serves to change the direction of propagation of the light; an exit surface (113), wherein the light exits the optical plastic folding element (110) from the exit surface (113); and a reflective foil (114) arranged on the at least one reflective surface (112), wherein a bottom side of the reflective foil (114) is in physical contact with the at least one reflective surface (112) and a top side of the reflective foil (114) is arranged relative to the bottom side, wherein the reflective foil (114) comprises, in order from the bottom side to the top side furthest from the at least one reflective surface (112): a first multilayer film (1141) comprising at least one first low-reflective layer (1141a) and at least one first high-reflective layer (1141b), wherein the reflectance of the at least one first high-reflective layer (1141b) is higher than the reflectance of the at least one first low-reflective layer (1141a), and the at least one first high-reflective layer (1141b) and the at least one first low-reflective layer (1141a) are stacked alternately; a first compound layer (1142) containing aluminium oxide; a first Ag layer (1143) containing Argentum; a barrier layer (1144) containing at least one of the following: nickel, titanium, vanadium, chromium, nickel oxide, titanium oxide, vanadium oxide and chromium oxide; and a second multilayer film (1147) comprising at least one second low-reflective layer (1147a) and at least one second high-reflective layer (1147b), wherein the reflectance of the at least one second high-reflective layer (1147b) is higher than the reflectance of the at least one second low-reflective layer (1147a), and the at least one second high-reflective layer (1147b) and the at least one second low-reflective layer (1147a) are stacked alternately; where the thickness of the first multilayer film (1141) is Dmf1, the thickness of the barrier layer (1144) is Db, the distance between the first Ag layer (1143) and the underside is Hag1, and the following conditions are met: 70 nm < Dmf1 < 420 nm; 20 nm < Db < 180 nm; and 90 nm < Hag1 < 550 nm .

Description

BACKGROUND Technical area

[0001] The present disclosure relates to an optical plastic folding element and an imaging lens module. In particular, the present disclosure relates to an optical plastic folding element and an imaging lens module suitable for portable electronic devices. Description of the related technique

[0002] In recent years, portable electronic devices have developed rapidly. Smart devices and tablets, for example, have become commonplace in modern life, and imaging lens assemblies mounted on portable electronic devices have also seen significant advancements. However, with technological progress, the quality requirements for imaging lens assemblies are constantly increasing. Therefore, it is necessary to develop an imaging lens assembly that can improve image quality. BRIEF DESCRIPTION OF THE INVENTION

[0003] According to one aspect of the present disclosure, an optical plastic folding element comprises an incident surface, at least one reflective surface, an exit surface, and a reflective film. Light enters the optical plastic folding element through the incident surface. The reflective surface serves to change the direction of propagation of the light. The light exits the optical plastic folding element via the exit surface. A reflective film is arranged on the reflective surface, with a bottom side of the reflective film being in physical contact with the reflective surface and a top side of the reflective film being arranged relative to the bottom side. The reflective film comprises, in order from the bottom side to the top side furthest from the reflective surface, a first multilayer film, a first bonding layer, a first silver layer, a barrier layer, and a second multilayer film.The first multilayer film comprises at least one first low-reflective layer and at least one first high-reflective layer. The reflectance of the first high-reflective layer is higher than that of the first low-reflective layer, and the first high-reflective and low-reflective layers are stacked alternately. The first compound layer contains aluminum oxide. The first silver layer contains silver. The barrier layer contains at least one of nickel, titanium, vanadium, chromium, nickel oxide, titanium oxide, vanadium oxide, and chromium oxide. The second multilayer film comprises at least one second low-reflective layer and at least one second high-reflective layer.The reflectance of the second high-reflective layer is higher than that of the second low-reflective layer, and the second high-reflective and second low-reflective layers are stacked alternately. If the thickness of the first multilayer film is Dmf1, the thickness of the barrier layer is Db, and the distance between the first Ag layer and the bottom surface is Hag1, then the following conditions are met: 70 nm < Dmf1 < 420 nm; 20 nm < Db < 180 nm; and 90 nm < Hag1 < 550 nm.

[0004] According to the optical plastic folding element of the preceding aspect, the reflective film further comprises a second Ag layer and a second compound layer. The second Ag layer contains Argentum and is located between the barrier layer and the second multilayer film, wherein the second Ag layer is located further away from the at least one reflective surface than the barrier layer is from the at least one reflective surface and is in physical contact with the barrier layer. The second compound layer comprises aluminum oxide, wherein the second compound layer is located further away from the at least one reflective surface than the second Ag layer is from the at least one reflective surface and is in physical contact with the second Ag layer.

[0005] According to the optical plastic folding element of the previous aspect, a number of layers of the reflective film and a layer material of the reflective film are arranged symmetrically with the barrier layer as the center.

[0006] According to the optical plastic folding element of the previous aspect, at least one of the incidence surface, the exit surface and the at least one reflection surface has a curvature.

[0007] According to the optical plastic folding element of the previous aspect, the number of at least one reflective surface is at least two.

[0008] According to the optical plastic folding element of the previous aspect, if a distance between the second Ag layer and the top surface is Hag2, the following condition is met: 60 nm < Hag2 < 480 nm.

[0009] According to the optical plastic folding element of the previous aspect, if the distance between the first Ag layer and the bottom is Hag1, the following condition is met: 180 nm < Hag1 < 460 nm.

[0010] According to the optical plastic folding element of the previous aspect, if the thickness of the barrier layer is Db, the following condition is met: 35 nm < Db < 120 nm.

[0011] According to the optical plastic folding element of the previous aspect, if an average reflectance, measured from the underside of the reflective layer reflecting a wavelength of 400 nm to 1000 nm, is R1, the following condition is met: 85% < R1 < 100%.

[0012] According to the optical plastic folding element of the previous aspect, if an average reflectance, measured from the top of the reflective layer reflecting a wavelength of 400 nm to 1000 nm, is R2, then the following condition is met: 95% < R2 < 100%.

[0013] According to the optical plastic folding element of the previous aspect, nickel is a main material of the barrier layer.

[0014] According to the optical plastic folding element of the preceding aspect, the optical plastic folding element further comprises a plurality of connecting surfaces that are connected to the incident surface, the exit surface and the at least one reflective surface, wherein there is a step structure between the at least one reflective surface and one of the adjacent connecting surfaces to form a height difference between the at least one reflective surface and the connecting surface, if the height difference Hs is, the following condition is satisfied: 0.005 mm ≤ Hs ≤ 0.22 mm.

[0015] According to one aspect of the present disclosure, an optical plastic folding element comprises an incidence surface, at least one reflection surface, an exit surface, and a reflective film. Light enters the optical plastic folding element through the incidence surface. The reflection surface serves to change the direction of propagation of the light. The light exits the optical plastic folding element via the exit surface. A reflective film is arranged on the reflection surface, with a bottom side of the reflective film being in physical contact with the reflection surface and a top side of the reflective film being arranged relative to the bottom side. The reflective film comprises, in order from the bottom side to the top side furthest from the reflection surface, a first multilayer film, a first bonding layer, a first silver layer, and a barrier layer.The first multilayer film comprises at least one first low-reflective layer and at least one first high-reflective layer. The reflectance of the first high-reflective layer is higher than that of the first low-reflective layer, and the first high-reflective and first low-reflective layers are stacked alternately. The first compound layer contains aluminum oxide. The first silver layer contains silver. The barrier layer contains at least one of nickel, titanium, vanadium, chromium, nickel oxide, titanium oxide, vanadium oxide, and chromium oxide. If the thickness of the first multilayer film is Dmf1, the thickness of the barrier layer is Db, and the distance between the first silver layer and the bottom surface is Hag1, the following conditions are met: 0.1 < Db / Dmf1 < 0.9; 70 nm < Dmf1 < 420 nm; and 90 nm < Hag1 < 550 nm.

[0016] According to the optical plastic folding element of the preceding aspect, the reflective film further comprises a second Ag layer containing Argentum, wherein the second Ag layer is located further away from the at least one reflective surface than the barrier layer is from the at least one reflective surface and is in physical contact with the barrier layer.

[0017] According to the optical plastic folding element of the previous aspect, at least one of the incidence surface, the exit surface and the at least one reflection surface has a curvature.

[0018] According to the optical plastic folding element of the previous aspect, the number of at least one reflective surface is at least two.

[0019] According to the optical plastic folding element of the previous aspect, if the distance between the first Ag layer and the bottom is Hag1, the following condition is met: 180 nm < Hag1 < 460 nm.

[0020] According to the optical plastic folding element of the previous aspect, if the thickness of the barrier layer is Db, the following condition is met: 35 nm < Db < 120 nm.

[0021] According to the optical plastic folding element of the previous aspect, if the thickness of the first multilayer film is Dmf1 and the thickness of the barrier layer is Db, the following condition is met: 0.1 < Db / Dmf1 < 0.4.

[0022] According to the optical plastic folding element of the previous aspect, if an average reflectance, measured from the underside of the reflective layer reflecting a wavelength of 400 nm to 1000 nm, is R1, the following condition is met: 85% < R1 < 100%.

[0023] According to the optical plastic folding element of the previous aspect, if an average reflectance, measured from the top of the reflective layer reflecting a wavelength of 400 nm to 1000 nm, is R2, then the following condition is met: 95% < R2 < 100%.

[0024] According to the optical plastic folding element of the previous aspect, nickel is a main material of the barrier layer.

[0025] According to the optical plastic folding element of the preceding aspect, the optical plastic folding element further comprises a plurality of connecting surfaces that are connected to the incident surface, the exit surface and the at least one reflective surface, wherein there is a step structure between the at least one reflective surface and one of the adjacent connecting surfaces to form a height difference between the at least one reflective surface and the connecting surface, if the height difference Hs is, the following condition is satisfied: 0.005 mm ≤ Hs ≤ 0.22 mm.

[0026] According to one aspect of the present disclosure, an imaging lens module comprises the optical plastic folding element according to the preceding aspect.

[0027] According to one aspect of the present disclosure, an electronic device comprises the imaging lens module of the preceding aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present disclosure may be more fully understood by reading the following detailed description of the embodiment, with reference to the accompanying drawings as follows: Fig. Figure 1A is a schematic view of an imaging lens module according to the first example of the first embodiment of the present disclosure. Fig. Figure 1B is a side view of the optical plastic folding element according to the first example of the first embodiment of Fig. 1A. Fig. 1C is a three-dimensional view of the optical plastic folding element made of Fig. 1B. Fig. 1D is another three-dimensional view of the optical plastic folding element made of Fig. 1B. Fig. 1E is a schematic view of the reflective foil of Fig. 1B. Fig. 1F is a schematic view of the first multilayer film made of Fig.1E. Fig. 1G is a schematic view of the second multilayer film made of Fig. 1E. Fig. 1H shows the reflectance of the first and second sides of the reflective foil. Fig. Figure 1I is a three-dimensional view of the optical plastic folding element according to the second example of the first embodiment of the present disclosure. Fig. 2A is a schematic view of an imaging lens module according to the first example of the second embodiment of the present disclosure. Fig. 2B is a side view of the optical plastic folding element according to the first example of the second embodiment of Fig. 2A. Fig. 2C is a three-dimensional view of the optical plastic folding element made of Fig. 2B. Fig. 2D is a schematic view of the reflective foil of Fig. 2B. Fig.2E is a schematic view of the first multilayer film made of Fig. 2D. Fig. 2F is a schematic view of the second multilayer film made of Fig. 2D. Fig. 2G shows the reflectance of the first and second sides of the reflective foil. Fig. Figure 3A is a schematic view of an imaging lens module according to the first example of the third embodiment of the present disclosure. Fig. Figure 3B is a side view of the optical plastic folding element according to the first example of the third embodiment of Fig. 3A. Fig. 3C is a three-dimensional view of the optical plastic folding element made of Fig. 3B. Fig. 3D is a schematic view of the reflective foil of Fig. 3B. Fig. 3E is a schematic view of the first multilayer film of Fig. 3D. Fig.3F is a schematic view of the second multilayer film of Fig. 3D. Fig. Figure 4A is a schematic view of an electronic device according to the fourth embodiment of the present disclosure. Fig. Figure 4B is another schematic view of the electronic device according to the fourth embodiment of Fig. 4A. Fig. 4C is a schematic view of an image produced by the electronic device according to the fourth embodiment of Fig. 4A was recorded. Fig. 4D is another schematic view of the image produced by the electronic device according to the fourth embodiment of Fig. 4A was recorded. Fig. 4E is another schematic view of the image produced by the electronic device according to the fourth embodiment of Fig. 4A was recorded. Fig.Figure 5 is a schematic view of an electronic device according to the fifth embodiment of the present disclosure. DETAILED DESCRIPTION

[0029] The present disclosure provides an optical plastic folding element comprising an incidence surface, at least one reflection surface, an exit surface, and a reflective film. Light enters the optical plastic folding element through the incidence surface. The reflection surface serves to change the direction of propagation of the light. The light exits the optical plastic folding element via the exit surface. A reflective film is arranged on the reflection surface, with a bottom side of the reflective film in physical contact with the reflection surface and a top side of the reflective film positioned relative to the bottom side. The reflective film comprises, in order from the bottom side to the top side furthest from the reflection surface, a first multilayer film, a first bonding layer, a first silver layer, a barrier layer, and a second multilayer film.The first multilayer film comprises at least one first low-reflective layer and at least one first high-reflective layer. The reflectance of the first high-reflective layer is higher than that of the first low-reflective layer, and the first high-reflective and low-reflective layers are stacked alternately. The first compound layer contains aluminum oxide. The first silver layer contains silver. The barrier layer contains at least one of nickel, titanium, vanadium, chromium, nickel oxide, titanium oxide, vanadium oxide, and chromium oxide. The second multilayer film comprises at least one second low-reflective layer and at least one second high-reflective layer.The reflectance of the second high-reflective layer is higher than that of the second low-reflective layer, and the second high-reflective and second low-reflective layers are stacked alternately. If the thickness of the first multilayer film is Dmf1, the thickness of the barrier layer is Db, and the distance between the first Ag layer and the bottom layer is Hag1, the following conditions are met: 70 nm < Dmf1 < 420 nm; 20 nm < Db < 180 nm; and 90 nm < Hag1 < 550 nm. Therefore, the first multilayer film is advantageous for increasing light transmittance and adjusting the spectrum of reflected light; the first bonding layer is advantageous for improving the bond stability of the first Ag layer; and the second multilayer film is advantageous for protecting the barrier layer and further protecting the first Ag layer.If the thickness of the barrier layer meets the aforementioned condition, which is advantageous for protecting the first Ag layer from oxidation or damage by external forces, then increasing the distance between the first Ag layer and the reflective surface is beneficial for preventing oxidation of the first Ag layer in high-temperature, high-humidity environments.

[0030] In particular, the barrier layer can be an alloy of at least two metals, such as a nickel-titanium alloy, although the present disclosure is not limited to this. Furthermore, according to the present disclosure, the main material of each layer means that the main material constitutes more than 50% of the total material.

[0031] The reflective foil can further comprise a second silver layer and a second compound layer. The second silver layer contains silver and is located between the barrier layer and the second multilayer foil. The second silver layer is located further from the at least one reflective surface than the barrier layer is from the at least one reflective surface and is in physical contact with the barrier layer. The second compound layer comprises aluminum oxide, and the second compound layer is located further from the at least one reflective surface than the second silver layer is from the at least one reflective surface and is in physical contact with the second silver layer. Therefore, by adding the second silver layer, both sides of the reflective foil can provide a reflective function, which is advantageous for improving the efficiency of the optical quality inspection of the reflective foil.

[0032] The number of layers and the material of the reflective foil can be arranged symmetrically with the barrier layer at the center. Therefore, for the efficiency of optical quality control of the reflective foil, it is advantageous to match the optical properties of both sides of the foil.

[0033] At least one of the incident surface, the exit surface, and the at least one reflecting surface can be curved. Since the direction of light reflection is not easy to control and optical quality control of the reflective film is not straightforward, it is advantageous to quickly verify the optical quality of the reflective film by arranging a two-sided reflection function when the surface of the optical plastic folding element is curved. Furthermore, the incident and exit surfaces can be coated with anti-reflective films.

[0034] The number of reflective surfaces can be at least two. Since light can be reflected multiple times within an optical plastic folding element with a multitude of reflective surfaces, and detection instruments cannot verify the quality of the reflected light within the optical plastic folding element, a reflective film with a two-sided reflective function is advantageous for verifying the optical quality of the reflective film from the outside of the optical plastic folding element.

[0035] If the distance between the second Ag layer and the top surface is Hag2, the following condition is met: 60 nm < Hag2 < 480 nm. Therefore, it is advantageous that the second Ag layer is not oxidized.

[0036] If the distance between the first Ag layer and the underside is Hag1, the following condition is met: 180 nm < Hag1 < 460 nm. Therefore, it is advantageous that the first Ag layer is not oxidized.

[0037] If the thickness of the barrier layer is Db, the following condition is met: 35 nm < Db < 120 nm. Therefore, it is favorable for the protection of the Ag layer.

[0038] If the average reflectance, measured from the underside of the reflective layer reflecting wavelengths from 400 nm to 1000 nm, is R1, then the following condition is met: 85% < R1 < 100%. Therefore, it is advantageous for improving the image quality of the imaging lens module.

[0039] If the average reflectance, measured from the top surface of the reflective layer reflecting wavelengths from 400 nm to 1000 nm, is R2, then the following condition is met: 95% < R2 < 100%. Therefore, it is advantageous to check the quality of the reflective foil.

[0040] Nickel can be a primary material of the barrier layer. It is advantageous to prevent oxidation of the first silver layer due to the good adhesion between nickel and silver.

[0041] The optical plastic folding element can further feature a multitude of connecting surfaces linked to the incidence, exit, and reflection surfaces. A stepped structure exists between the reflection surface and one of the adjacent connecting surfaces to create a height difference between the reflection surface and the connecting surface. If the height difference is Hs, the following condition is met: 0.005 mm ≤ Hs ≤ 0.22 mm. Therefore, it is advantageous for controlling the surface accuracy of the mold and for performing automated optical inspection (AOI). In detail, the gate track can be positioned further on the connecting surface, which is beneficial for preventing stray light. Furthermore, light-absorbing material can be placed on the connecting surface, which can reduce light reflection.Furthermore, the stepped structure can also be arranged on the inlet surface or the outlet surface, and the present disclosure is not limited to the embodiment or example herein.

[0042] The present disclosure provides an optical plastic folding element comprising an incidence surface, at least one reflection surface, an exit surface, and a reflective film. Light enters the optical plastic folding element through the incidence surface. The reflection surface serves to change the direction of propagation of the light. The light exits the optical plastic folding element via the exit surface. A reflective film is arranged on the reflection surface, with a bottom side of the reflective film in physical contact with the reflection surface and a top side of the reflective film positioned relative to the bottom side. The reflective film comprises, in order from the bottom side to the top side furthest from the reflection surface, a first multilayer film, a first bonding layer, a first silver layer, and a barrier layer.The first multilayer film comprises at least one first low-reflective layer and at least one first high-reflective layer. The reflectance of the first high-reflective layer is higher than that of the first low-reflective layer, and the first high-reflective and first low-reflective layers are stacked alternately. The first compound layer contains aluminum oxide. The first silver layer contains silver. The barrier layer contains at least one of nickel, titanium, vanadium, chromium, nickel oxide, titanium oxide, vanadium oxide, and chromium oxide. If the thickness of the first multilayer film is Dmf1, the thickness of the barrier layer is Db, and the distance between the first silver layer and the bottom surface is Hag1, the following conditions are met: 0.1 < Db / Dmf1 < 0.9; 70 nm < Dmf1 < 420 nm; and 90 nm < Hag1 < 550 nm.Therefore, it is advantageous for increasing light transmittance and for adjusting the spectrum of reflected light by the first multilayer film; the first bonding layer is advantageous for improving the bond stability of the first Ag layer. If the thickness of the barrier layer meets the aforementioned condition, it is advantageous for protecting the first Ag layer from oxidation or damage by external forces. It is advantageous for preventing oxidation of the first Ag layer in high-temperature, high-humidity environments by increasing the distance between the first Ag layer and the reflective surface.

[0043] In particular, the barrier layer can be an alloy of at least two metals, such as a nickel-titanium alloy, although the present disclosure is not limited to this. Furthermore, according to the present disclosure, the main material of each layer means that the main material constitutes more than 50% of the total material.

[0044] The reflective layer can further contain a second Ag layer containing Argentum, wherein the second Ag layer is located further away from the at least one reflective surface than the barrier layer is from the at least one reflective surface and is in physical contact with the barrier layer. Therefore, by adding the second Ag layer, both sides of the reflective foil can provide a reflective function, which is advantageous for improving the efficiency of the optical quality inspection of the reflective foil.

[0045] At least one of the incident surface, the exit surface, and the at least one reflecting surface can be curved. Since the direction of light reflection is not easy to control and optical quality control of the reflective film is not straightforward, it is advantageous to quickly verify the optical quality of the reflective film by applying a two-sided reflection function when the surface of the optical plastic folding element is curved. Furthermore, the incident and exit surfaces can be coated with anti-reflective films.

[0046] The number of reflective surfaces can be at least two. Since light can be reflected multiple times within an optical plastic folding element with a multitude of reflective surfaces, and detection instruments cannot verify the quality of the reflected light within the optical plastic folding element, a reflective film with a two-sided reflective function is advantageous for verifying the optical quality of the reflective film from the outside of the optical plastic folding element.

[0047] If the distance between the first Ag layer and the underside is Hag1, the following condition is met: 180 nm < Hag1 < 460 nm. Therefore, it is advantageous that the first Ag layer is not oxidized.

[0048] If the thickness of the barrier layer is Db, the following condition is met: 35 nm < Db < 120 nm. Therefore, it is favorable for the protection of the Ag layer.

[0049] If the thickness of the first multilayer film is Dmf1 and the thickness of the barrier layer is Db, the following condition is met: 0.1 < Db / Dmf1 < 0.4. Therefore, both sides of the first Ag layer can be protected.

[0050] If the average reflectance, measured from the underside of the reflective layer reflecting wavelengths from 400 nm to 1000 nm, is R1, then the following condition is met: 85% < R1 < 100%. Therefore, it is advantageous for improving the image quality of the imaging lens module.

[0051] If the average reflectance, measured from the top surface of the reflective layer reflecting wavelengths from 400 nm to 1000 nm, is R2, then the following condition is met: 95% < R2 < 100%. Therefore, it is advantageous to check the quality of the reflective foil.

[0052] Nickel can be a primary material of the barrier layer. Due to the good adhesion between nickel and silver, it is advantageous to prevent the oxidation of the first silver layer.

[0053] The optical plastic folding element can further feature a multitude of connecting surfaces linked to the incidence, exit, and reflection surfaces. A stepped structure exists between the reflection surface and one of the adjacent connecting surfaces to create a height difference between the reflection surface and the connecting surface. If the height difference is Hs, the following condition is met: 0.005 mm ≤ Hs ≤ 0.22 mm. Therefore, it is advantageous for controlling the surface accuracy of the mold and for performing automated optical inspection (AOI). In detail, the gate track can be positioned further on the connecting surface, which is beneficial for preventing stray light. Furthermore, light-absorbing material can be placed on the connecting surface, which can reduce light reflection.Furthermore, the stepped structure can also be arranged on the inlet surface or the outlet surface, and the present disclosure is not limited to the embodiment or example herein.

[0054] The present disclosure provides an imaging lens module comprising the aforementioned optical plastic folding element.

[0055] The present disclosure provides an electronic device containing the aforementioned imaging lens module. <Erste Ausführungsform>

[0056] Fig. Figure 1A is a schematic view of an imaging lens module 100 according to the first example of the first embodiment of the present disclosure. Fig.1A comprises the imaging lens module 100, in the order from an object side to an image side, a first lens arrangement 101, an optical plastic folding element 110, a second lens arrangement 102, a third lens arrangement 103, an optical folding element 104, and an image surface 105. The first lens arrangement 101 comprises a lens tube element 1011 and at least one lens element 1012, wherein the lens element 1012 is arranged in the lens tube element 1011 along a first optical axis X1. The second lens arrangement 102 comprises a lens tube element 1021 and a plurality of lens elements 1022, wherein the lens elements 1022 are arranged in the lens tube element 1021 along a second optical axis X2. The third lens arrangement 103 comprises a lens tube element 1031 and at least one lens element 1032, wherein the lens element 1032 is arranged in the lens tube element 1031 along the second optical axis X2.The first optical axis X1 is folded via the optical plastic folding element 110 to the second optical axis X2, and then the second optical axis X2 is folded via the optical folding element 104 to a third optical axis X3 in order to image onto the image surface 105. It should be noted that the optical folding element 104 may be the same as or different from the optical plastic folding element 110, and the following description will mainly illustrate the optical plastic folding element 110.

[0057] Fig. Figure 1B is a side view of the optical plastic folding element 110 according to the first example of the first embodiment of Fig. 1A, Fig. 1C is a three-dimensional view of the optical plastic folding element 110 from Fig. 1B, and Fig. 1D is another three-dimensional view of the optical plastic folding element 110 from Fig. 1B. In Fig. 1A, Fig. 1B, Fig. 1C and Fig.Figure 1D comprises the optical plastic folding element 110, comprising an incidence surface 111, a reflection surface 112, an exit surface 113, and a reflective foil 114. Light enters the optical plastic folding element 110 through the incidence surface 111, traveling along the first optical axis X1. The reflection surface 112 serves to change the direction of propagation of the light; that is, the light is folded over the reflection surface 112 and then propagates along the second optical axis X2. The light exits the optical plastic folding element 110 at the exit surface 113. The reflective foil 114 is arranged on the reflection surface 112. One underside of the reflective foil 114 is in physical contact with the reflection surface 112, and one top side of the reflective foil 114 is positioned relative to the underside.Furthermore, the optical plastic folding element 110 can have at least one gate track 116, which can be arranged on the surface of the optical plastic folding element 110, which differs from the incidence surface 111, the reflection surface 112 and the exit surface 113.

[0058] Fig. 1E is a schematic view of the reflective foil 114 from Fig. 1B. In Fig. 1E comprises the reflective foil 114 in the order from bottom to top, which is furthest from the reflective surface 112, a first multilayer foil 1141, a first bonding layer 1142, a first Ag layer 1143, a barrier layer 1144, a second Ag layer 1145, a second bonding layer 1146 and a second multilayer foil 1147.

[0059] Fig. 1F is a schematic view of the first multilayer film 1141 made of Fig. 1E. In Fig. 1E and Fig.1F comprises the first multilayer film 1141, consisting of two low-reflectivity first layers 1141a and two high-reflectivity first layers 1141b. The reflectance of each high-reflectivity first layer 1141b is higher than that of each low-reflectivity first layer 1141a, and the high-reflectivity first layers 1141b and the low-reflectivity first layers 1141a are stacked alternately, with the low-reflectivity first layer 1141a stacked directly on the reflective surface 112. The first compound layer 1142 is stacked directly on the first high-reflectivity first layer 1141b of the first multilayer film 1141, and the first compound layer 1142 comprises aluminum oxide. The first Ag layer 1143 is stacked directly on the first compound layer 1142, and the first Ag layer 1143 contains silver. The barrier layer 1144 is stacked directly onto the first Ag layer 1143, and the barrier layer 1144 contains nickel.The second Ag layer 1145 contains argentum, which is located between the barrier layer 1144 and the second multilayer film 1147. The second Ag layer 1145 is located further from the reflective surface 112 than the barrier layer 1144 is from the reflective surface 112 and is in physical contact with the barrier layer 1144; that is, the second Ag layer 1145 is stacked directly onto the barrier layer 1144. The second compound layer 1146 contains aluminum oxide, wherein the second compound layer 1146 is located further from the reflective surface 112 than the second Ag layer 1145 is from the reflective surface 112 and is in physical contact with the second Ag layer 1145; that is, the second compound layer 1146 is stacked directly onto the second Ag layer 1145. Fig. 1G is a schematic view of the second multilayer film 1147 from Fig. 1E. In Fig. 1E and Fig.In 1G, the second multilayer film 1147 comprises two second low-reflective layers 1147a and two second high-reflective layers 1147b. The reflectance of each second high-reflective layer 1147b is higher than the reflectance of each second low-reflective layer 1147a, and the second high-reflective layers 1147b and the second low-reflective layer 1147a are stacked alternately, with the second high-reflective layer 1147b being stacked directly onto the second bonding layer 1146.

[0060] In Fig. 1B, Fig. 1C and Fig.In 1D, the optical plastic folding element 110 can further comprise a plurality of connecting surfaces 115 which are connected to the incidence surface 111, the exit surface 113 and the reflection surface 112. Between the reflection surface 112 and one of the adjacent connecting surfaces 115 there is a step structure 1151 to form a height difference Hs between the reflection surface 112 and the connecting surface 115, wherein according to the first example of the first embodiment, Fig. 1B Hs = 0.05 mm.

[0061] According to the first example of the first embodiment, the material and thickness of each layer of the reflective foil 114 are given in the following Table 1A. Table 1A - the first example of the first embodiment Shift No. Material . Layer thickness (nm) 13 Second multilayer film 1147 SiO2 123,26 12 TiO2 28,63 11 SiO2 86,46 10 TiO2 41,7 9 Second bonding layer 1146 Al2O3 60 8 Second Ag layer 1145 AG 70 7 Barrier layer 1144 Ni 40 6 First Ag layer 1143 AG 70 5 First bonding layer 1142 Al2O3 60 4 First multilayer film 1141 TiO2 35 3 SiO2 80 2 TiO2 20 1 SiO2 70 Reflective surface 112

[0062] In Table 1A, Fig. 1E, Fig. 1F and Fig. 1G represents a number of layers of the reflective layer 114 and a layer material of the reflective layer 114 arranged symmetrically with the barrier layer 1144 as the center.

[0063] According to the first example of the first embodiment, if the thickness of the first multilayer film 1141 is Dmf1, the thickness of the barrier layer 1144 is Db, the distance between the first Ag layer 1143 and the bottom is Hag1, the distance between the second Ag layer 1145 and the top is Hag2, the average reflectance measured from the bottom of the reflective layer 114, which reflects a wavelength from 400 nm to 1000 nm, is R1, and the average reflectance measured from the top of the reflective film 114, which reflects a wavelength from 400 nm to 1000 nm, is R2, the parameter data are given in the following Table 1B. Table 1B - the first example of the first embodiment Dmf1 (nm) dB (nm) Hag1 (nm) Hag2 (nm) R1 R2 (%) 205 40 265 340,05 87,19 97,10

[0064] Fig. 1H shows the reflectance of the first side 114a (only in Fig. 1H labeled) and the second page 114b (only in Fig.1H labeled) of the reflective foil 114, wherein the reflectance of the reflective foil 114 coated on a plastic plate is measured. The reflectance of the first side 114a is obtained from the light transmitted from the underside of the reflective foil 114, and the reflectance of the second side 114b is obtained from the light transmitted from the top side of the reflective foil 114.

[0065] Fig. Figure 1I is a three-dimensional view of the optical plastic folding element 110 according to the second example of the first embodiment of the present disclosure. Fig.The differences between the optical plastic folding element 110 according to the second example of the first embodiment and the optical plastic folding element 110 according to the first example of the first embodiment are that the inlet surface 111 and the outlet surface 113 of the optical plastic folding element 110 according to the second example of the first embodiment have curvatures. Other elements of the optical plastic folding element 110 according to the second example of the first embodiment are identical or similar to the elements of the optical plastic folding element 110 according to the first example of the first embodiment, which will not be described again here. <Zweite Ausführungsform>

[0066] Fig. Figure 2A is a schematic view of an imaging lens module 200 according to the first example of the second embodiment of the present disclosure. Fig.2A comprises the imaging lens module 200, in order from an object side to an image side, a first lens arrangement 201, a second lens arrangement 202, an optical plastic folding element 210, and an image surface 205. The first lens arrangement 201 comprises a lens tube element 2011 and a plurality of lens elements 2012, wherein the lens elements 2012 are arranged in the lens tube element 2011 along a first optical axis X1. The second lens arrangement 202 comprises a lens tube element 2021 and a plurality of lens elements 2022, wherein the lens elements 2022 are arranged in the lens tube element 2021 along the first optical axis X1, and the second lens arrangement 202 is arranged on an image side of the first lens arrangement 201 along the first optical axis X1.The first optical axis X1 is folded via the optical plastic folding element 210 to the second optical axis X2 and then folded to a third optical axis X3 to image onto the image surface 205. Furthermore, the optical plastic folding element 210 is arranged via a cover 2062 and connected to the second lens arrangement 202 via a cover 2061. The image surface 205 is arranged on a base 207, and the base is connected to the cover 2061.

[0067] Fig. Figure 2B is a side view of the optical plastic folding element 210 according to the first example of the second embodiment of the Fig. 2A, Fig. 2C is a three-dimensional view of the optical plastic folding element 210 of the Fig. 2B. In Fig. 2A, Fig. 2B and Fig.The optical plastic folding element 210 comprises an incidence surface 211, two reflection surfaces 212, an exit surface 213, and two reflective foils 214. Light enters the optical plastic folding element 210 through the incidence surface 211, traveling along the first optical axis X1. The reflection surfaces 212 serve to change the direction of travel of the light; that is, the light is folded over the reflection surfaces 212 and then travels along the second optical axis X2 and the third optical axis X3. The light exits the optical plastic folding element 210 via the exit surface 213. The reflective foils 214 are arranged on the reflection surfaces 212. A bottom surface of each reflective foil 214 is in physical contact with each reflection surface 212, and a top surface of each reflective foil 214 is positioned relative to the bottom surface.It is noted that the incidence surface 211 and the exit surface 213 of the optical plastic folding element 210 are arranged on the same side of it, and the optical plastic folding element 210 further comprises a total reflection surface (its reference numeral is omitted), so that the second optical axis X2 is folded once over the total reflection surface before being folded over the reflection surfaces 212 to the third optical axis X3.

[0068] Fig. 2D is a schematic view of the reflective foil 214 made of Fig. 2B. In Fig. 2D comprises the reflective foil 214 in the order from bottom to top, which is removed from the reflective surface 212, a first multilayer foil 2141, a first bonding layer 2142, a first Ag layer 2143, a barrier layer 2144, a second Ag layer 2145, a second bonding layer 2146 and a second multilayer foil 2147.

[0069] Fig. 2E is a schematic view of the first multilayer film 2141 from Fig. 2D. In Fig. 2D and Fig.2E comprises the first multilayer film 2141, consisting of two low-reflectivity first layers 2141a and two high-reflectivity first layers 2141b. The reflectance of each high-reflectivity first layer 2141b is higher than that of each low-reflectivity first layer 2141a, and the high-reflectivity first layers 2141b and the low-reflectivity first layers 2141a are stacked alternately, with the low-reflectivity first layer 2141a stacked directly on the reflective surface 212. The first compound layer 2142 is stacked directly on the first high-reflectivity first layer 2141b of the first multilayer film 2141, and the first compound layer 2142 contains aluminum oxide. The first Ag layer 2143 is stacked directly on the first compound layer 2142, and the first Ag layer 2143 contains silver. The barrier layer 2144 is stacked directly onto the first Ag layer 2143, and the barrier layer 2144 contains nickel.The second Ag layer 2145 contains argentum, which is located between the barrier layer 2144 and the second multilayer film 2147. The second Ag layer 2145 is located farther from the reflective surface 212 than the barrier layer 2144 is from the reflective surface 212 and is in physical contact with the barrier layer 2144; that is, the second Ag layer 2145 is stacked directly onto the barrier layer 2144. The second compound layer 2146 comprises aluminum oxide, wherein the second compound layer 2146 is located farther from the reflective surface 212 than the second Ag layer 2145 is from the reflective surface 212 and is in physical contact with the second Ag layer 2145; that is, the second compound layer 2146 is stacked directly onto the second Ag layer 2145. Fig. 2F is a schematic view of the second multilayer film 2147 from Fig. 2D. In Fig. 2D and Fig.In 2F, the second multilayer film 2147 comprises two second low-reflecting layers 2147a and one second high-reflecting layer 2147b. The reflectance of the second high-reflecting layer 2147b is higher than the reflectance of each of the second low-reflecting layers 2147a, and the second high-reflecting layer 2147b and the second low-reflecting layers 2147a are stacked alternately, with the second low-reflecting layer 2147a being stacked directly onto the second interconnect layer 2146.

[0070] In Fig. 2B and Fig.2C, the optical plastic folding element 210 can further comprise a plurality of connecting surfaces 215 which are connected to the incidence surface 211, the exit surface 213, and the reflective surfaces 212. Between each reflective surface 212 and one of the adjacent connecting surfaces 215, there is a step structure 2151 to form a height difference Hs between each reflective surface 212 and the connecting surface 215, wherein, according to the first example of the second embodiment, Fig. 2B Hs = 0.03 mm. Furthermore, the stepped structure 2151 forms according to the first example of the second embodiment of Fig. 2B a further height difference Hs' between the exit surface 213 and the connecting surface 215, Hs' = 0.01 mm.

[0071] According to the first example of the second embodiment, the material and thickness of each layer of the reflective foil 214 are given in the following Table 2A. Table 2A - the first example of the second embodiment Shift No. Material . Layer thickness (nm) 12 Second multilayer film 2147 SiO2 20 11 TiO2 44 10 SiO2 26 9 Second bonding layer 2146 Al2O3 28 8 Second Ag layer 2145 AG 70 7 Barrier layer 2144 Ni 40 6 First Ag layer 2143 AG 70 5 First compound layer 2142 Al2O3 60 4 First multilayer film 2141 TiO2 35 3 SiO2 80 2 TiO2 20 1 SiO2 70 Reflective surface 212

[0072] According to the first example of the second embodiment, if the thickness of the first multilayer film 2141 is Dmf1, the thickness of the barrier layer 2144 is Db, the distance between the first Ag layer 2143 and the bottom is Hag1, the distance between the second Ag layer 2145 and the top is Hag2, the average reflectance measured from the bottom of the reflective layer 214, which reflects a wavelength from 400 nm to 1000 nm, is R1, and the average reflectance measured from the top of the reflective film 214, which reflects a wavelength from 400 nm to 1000 nm, is R2, the parameter data are given in the following Table 2B. Table 2B - the first example of the second embodiment Dmf1 (nm) dB (nm) Hag1 (nm) Hag2 (nm) R1 (%) R2 (%) 205 40 265 118 87,71 96,00

[0073] Fig. 2G shows the reflectance of the first side 214a (only in Fig. 2G labelled) and the second page 214b (only in Fig.(labelled 2G) of the reflective foil 214, wherein the reflectance of the reflective foil 214 coated on a plastic plate is measured. The reflectance of the first side 214a is obtained from the light passing through from the underside of the reflective foil 214, and the reflectance of the second side 214b is obtained from the light passing through from the top side of the reflective foil 214. <Dritte Ausführungsform>

[0074] Fig. Figure 3A is a schematic view of an imaging lens module 300 according to the first example of the third embodiment of the present disclosure. Fig.3A comprises the imaging lens module 300, in order from an object side to an image side, an optical plastic folding element 310, a plurality of lens elements 3012, and an image surface 305, wherein the optical plastic folding element 310 and the lens elements 3012 are arranged in a lens tube element 3011 in order from the object side to the image side, and the image surface 305 is located on the image side of the optical plastic folding element 310 and the lens elements 3012. The light enters the optical plastic folding element 310 along a first optical axis X1, is folded through the optical plastic folding element 310, then enters the lens elements 3012, and then images onto the image surface 305.

[0075] Fig. Figure 3B is a side view of the optical plastic folding element 310 according to the first example of the third embodiment of the Fig. 3A, Fig.3C is a three-dimensional view of the optical plastic folding element 310 of the Fig. 3B. In Fig. 3A, Fig. 3B and Fig.3C comprises the optical plastic folding element 310, an incidence surface 311, three reflection surfaces 3121, 3122, 3123, an exit surface 313, and three reflective foils 3141, 3142, 3143, wherein the reflection surface 3121 and the incidence surface 311 are on the same side, and the reflection surfaces 3122, 3123 and the exit surface 313 are also on the same side. Light enters the optical plastic folding element 310 through the incidence surface 311 and travels along the first optical axis X1. The reflection surfaces 3121, 3122, 3123 serve to change the direction of propagation of the light; that is, the light is folded over the reflection surfaces 3121, 3122, 3123. The light exits the optical plastic folding element 310 at the exit surface 313 and enters the lens elements 3012. The reflective films 3141, 3142, 3143 are each arranged on the reflective surfaces 3121, 3122, 3123.A bottom surface of each of the reflective foils 3141, 3142, 3143 is physically in contact with each of the reflective surfaces 3121, 3122, 3123, a top surface of each of the reflective foils 3141, 3142, 3143 is arranged relative to the bottom surface.

[0076] Fig. 3D is a schematic view of the reflective foil 3141 made of Fig. 3B. In Fig. 3D comprises the reflective foil 3141 in the order from bottom to top, which is removed from the reflective surface 3121, a first multilayer foil 31411, a first bonding layer 31412, a first Ag layer 31413, a barrier layer 31414 and a second multilayer foil 31417.

[0077] Fig. 3E is a schematic view of the first multilayer film 31411 from Fig. 3D. In Fig. 3D and Fig.3E comprises the first multilayer film 31411, consisting of two low-reflectivity first layers 31411a and two high-reflectivity first layers 31411b. The reflectance of each high-reflectivity first layer 31411b is higher than the reflectance of each low-reflectivity first layer 31411a, and the high-reflectivity first layers 31411b and the low-reflectivity first layers 31411a are stacked alternately, with the low-reflectivity first layer 31411a stacked directly on the reflective surface 3121. The first compound layer 31412 is stacked directly on the first high-reflectivity first layer 31411b of the first multilayer film 31411, and the first compound layer 31412 comprises aluminum oxide. The first Ag layer 31413 is stacked directly on top of the first compound layer 31412, and the first Ag layer 31413 contains Argentum.The barrier layer 31414 is stacked directly onto the first Ag layer 31413, and the barrier layer 31414 contains nickel. Fig. 3F is a schematic view of the second multilayer film 31417 from Fig. 3D. In Fig. 3D and Fig. In 3F, the second multilayer film 31417 comprises a second low-reflective layer 31417a and a second high-reflective layer 31417b. The reflectance of the second high-reflective layer 31417b is higher than the reflectance of the second low-reflective layer 31417a, and the second high-reflective layer 31417b and the second low-reflective layer 31417a are stacked alternately, with the second low-reflective layer 31417a being stacked directly onto the barrier layer 31414.

[0078] It should be noted that, according to the first example of the third embodiment, the structure, material and relationship to the corresponding reflective surfaces 3122, 3123 of the reflective layers 3142, 3143 may be the same or similar to the previously mentioned reflective layer 3141 and the corresponding reflective surface 3121 and will not be described again here.

[0079] In Fig.3C The optical plastic folding element 310 can further comprise a plurality of connecting surfaces 315, which are connected to the incident surface 311 and the reflecting surfaces 3122, 3123. Between each reflecting surface 3122, 3123 and one of the adjacent connecting surfaces 315, there is a stepped structure (the reference number is omitted) to create a height difference between each reflecting surface 3122, 3123 and the connecting surface 315. Furthermore, there is another stepped structure between the incident surface 311 and one of the adjacent connecting surfaces 315.

[0080] The parameters and material of the elements according to the first example of the third embodiment may be the same or similar to the elements according to the first example of the first embodiment or the second embodiment and are not described again here. <Vierte Ausführungsform>

[0081] Fig.Figure 4A is a schematic view of an electronic device 40 according to the fourth embodiment of the present disclosure. Fig. Figure 4B is another schematic view of the electronic device 40 according to the fourth embodiment of Fig. 4A. As in Fig. 4A and Fig. As shown in Figure 4B, the electronic device 40 is a smartphone. The electronic device 40 comprises camera modules and a user interface 46, each camera module being able to include the imaging lens module according to any example of the aforementioned first to third embodiments. Specifically, the camera modules are a high-pixel camera module 41, an ultra-wide-angle camera module 42, and two telephoto camera modules 43, 44, and the user interface 46 is a touchscreen, although the present disclosure is not limited thereto.

[0082] A user selects a recording mode via the user interface 46. The user interface 46 is used to display the screen, and the recording angle can be manually adjusted to switch between different camera modules. At this point, the camera modules collect imaging light on their respective image sensors (not shown in the figures) and output electronic signals associated with images to an image signal processor (ISP) 45.

[0083] As in Fig.As shown in Figure 4A, the electronic device 40, according to the camera specifications of the electronic device 40, may further comprise an optical anti-shake mechanism (not shown in the figures). Furthermore, the electronic device 40 may comprise at least one focusing aid module (not shown in the figures) and at least one sensing component (not shown in the figures). The focusing aid module may be a flash module, an infrared distance measuring component, a laser focusing module, etc. The flash module serves to compensate for the color temperature. The sensor component may have functions for sensing physical impulses and kinetic energies, such as an accelerator, a gyroscope, and a Hall effect element, to detect vibrations or fluctuations caused by the user's hands or the external environment.Thus, the autofocus function and the optical anti-shake mechanism of the imaging lens arrangement on the electronic device 40 can serve to achieve excellent image quality and enable the electronic device 40, according to the present disclosure, to have a multi-mode shooting function, such as taking optimized selfies, high dynamic range (HDR) in low light conditions, shooting at 4K resolution, etc. Furthermore, the user can visually view the captured image of the camera via the user interface 46 and manually operate the viewfinder area on the user interface 46 to achieve the "what you see is what you get" (WYSIWYG) autofocus function.

[0084] Furthermore, the camera modules, the optical anti-shake mechanism, the detection component, and the focusing aid module can be arranged on a flexible printed circuit board (FPC) (not shown in the figures) and electrically connected to the image signal processor 45, etc., via a connector (not shown in the figures) to operate an imaging process. In newer electronic devices, such as smartphones, the trend is toward thin and lightweight designs. The camera modules and associated elements are arranged on an FPC, and the circuitry is integrated into a mainboard of an electronic device via a connector.Therefore, this can satisfy the mechanical design requirements of a limited interior space for the electronic device and the requirements of a circuit layout, while providing greater flexibility. It is also advantageous for the autofocus functions of the camera modules, which are flexibly controlled via a touchscreen of the electronic device. In the fourth embodiment, the electronic device 40 can comprise a plurality of the detection components and a plurality of the focusing aid modules. The detection components and the focusing aid modules are arranged on one FPC and at least one other FPC (not shown in the figures) and are electrically connected to the image signal processor 45, etc., via a suitable connector to operate an imaging process.In other embodiments (not shown in the figures), the detection components and optical auxiliary elements can be arranged on a main circuit board of an electronic device or on a circuit board of another shape according to a mechanical design and a circuit layout requirement.

[0085] Furthermore, the electronic device 40 may also include, but is not limited to, a display, a control unit, a storage unit, a random-access memory (RAM), a read-only memory (ROM), or a combination thereof.

[0086] Fig. 4C is a schematic view of an image produced by the electronic device 40 according to the fourth embodiment of Fig. 4A was recorded. As in Fig.As shown in 4C, a longer-range image can be captured via the ultra-wide-angle camera module 42, which has a function for capturing multiple views.

[0087] Fig. 4D is another schematic view of the image produced by the electronic device 40 according to the fourth embodiment of Fig. 4A was recorded. As in Fig. As shown in 4D, an image with a certain range and high pixel count can be captured via the high-pixel camera module 41, which has a function for high resolution and low distortion.

[0088] Fig. 4E is another schematic view of the image produced by the electronic device 40 according to the fourth embodiment of Fig. 4A was recorded. As in Fig.As shown in Figure 4E, a distant image can be captured and magnified to a high magnification via the telephoto camera modules 43, 44, which have a high magnification function.

[0089] As in Fig. 4C to Fig. As shown in Figure 4E, a zoom function of the electronic device 40 can be achieved when an image is captured via different camera modules with different focal lengths and processed using an image processing technology. <Fünfte Ausführungsform>

[0090] Fig. Figure 5 is a schematic view of an electronic device 50 according to the fifth embodiment of the present disclosure. As in Fig.As shown in Figure 5, the electronic device 50 is a smartphone. The electronic device 50 comprises a plurality of camera modules, each camera module being able to include the imaging lens module according to any example of the aforementioned first to third embodiments, although the present disclosure is not limited thereto. Specifically, the camera modules are two ultra-wide-angle camera modules 51, 52, two wide-angle camera modules 53, 54, four telephoto camera modules 55, 56, 57, 58, and a time-of-flight (TOF) module 59, the TOF module 59 being able to be other types of camera modules which are not limited in the present arrangement.

[0091] Furthermore, the camera modules 57, 58 can have a folding function of the light path, but the present disclosure is not limited to this.

[0092] According to the camera specifications of the electronic device 50, the electronic device 50 may further comprise an optical anti-shake mechanism (not shown in the figures). Furthermore, the electronic device 50 may comprise at least one focusing aid module (not shown in the figures) and at least one sensing component (not shown in the figures). The focusing aid module may be a flash module 501, an infrared distance-measuring component, a laser focusing module, etc. The flash module 501 serves to compensate for the color temperature. The sensor component may have functions for sensing physical impulses and kinetic energies, such as an accelerator, a gyroscope, and a Hall effect element, to detect vibrations or fluctuations caused by the user's hands or the external environment.Thus, the autofocus function and the optical anti-shake mechanism of the camera modules arranged on the electronic device 50 can function to obtain great image quality and enable the electronic device 50, according to the present disclosure, to have a multi-mode shooting function, such as taking optimized selfies, high dynamic range (HDR) with a low light source, 4K recording resolution, etc.

[0093] Furthermore, all other structures and arrangements according to the fifth embodiment are the same as the structures and arrangements according to the fourth embodiment and are not described again here.

Claims

[1] Optical plastic folding element (110) comprising: an incident surface (111), wherein light enters the optical plastic folding element (110) through the incident surface (111); at least one reflective surface (112), wherein the at least one reflective surface (112) serves to change the direction of propagation of the light; an exit surface (113), wherein the light exits the optical plastic folding element (110) from the exit surface (113); and a reflective foil (114) arranged on the at least one reflective surface (112), wherein a bottom side of the reflective foil (114) is in physical contact with the at least one reflective surface (112) and a top side of the reflective foil (114) is arranged relative to the bottom side, wherein the reflective foil (114) comprises, in order from the bottom side to the top side furthest from the at least one reflective surface (112): a first multilayer film (1141) comprising at least one first low-reflective layer (1141a) and at least one first high-reflective layer (1141b), wherein the reflectance of the at least one first high-reflective layer (1141b) is higher than the reflectance of the at least one first low-reflective layer (1141a), and the at least one first high-reflective layer (1141b) and the at least one first low-reflective layer (1141a) are stacked alternately; a first compound layer (1142) containing aluminium oxide; a first Ag layer (1143) containing Argentum; a barrier layer (1144) containing at least one of the following: nickel, titanium, vanadium, chromium, nickel oxide, titanium oxide, vanadium oxide and chromium oxide; and a second multilayer film (1147) comprising at least one second low-reflective layer (1147a) and at least one second high-reflective layer (1147b), wherein the reflectance of the at least one second high-reflective layer (1147b) is higher than the reflectance of the at least one second low-reflective layer (1147a), and the at least one second high-reflective layer (1147b) and the at least one second low-reflective layer (1147a) are stacked alternately; where the thickness of the first multilayer film (1141) is Dmf1, the thickness of the barrier layer (1144) is Db, the distance between the first Ag layer (1143) and the underside is Hag1, and the following conditions are met: 70 nm <Dmf1<420 nm; 20 nm <Db<180 nm; und 90 nm <Hag1<550 nm. [2] Optical plastic folding element (110) according to claim 1, wherein the reflective film (114) further comprises: a second Ag layer (1145) comprising Argentum and located between the barrier layer (1144) and the second multilayer film (1147), wherein the second Ag layer (1145) is located further away from the at least one reflective surface (112) than the barrier layer (1144) is from the at least one reflective surface (112) and is in physical contact with the barrier layer (1144); and a second compound layer (1146) comprising aluminium oxide, wherein the second compound layer (1146) is located further away from the at least one reflective surface (112) than the second Ag layer (1145) is from the at least one reflective surface (112) and is in physical contact with the second Ag layer (1145). [3] Optical plastic folding element (110) according to claim 2, wherein a number of layers of the reflective film (114) and a layer material of the reflective film (114) are arranged symmetrically with the barrier layer (1144) as the center. [4] Optical plastic folding element (110) according to claim 2, wherein at least one of the incident surface (111), the exit surface (113) and the at least one reflecting surface (112) has a curvature. [5] Optical plastic folding element (210) according to claim 2, wherein the number of the at least one reflective surface (212) is at least two. [6] Optical plastic folding element (110) according to claim 2, wherein there is a distance between the second Ag layer (1145) and the top surface Hag2, and the following condition is met: 60 nm <Hag2<480 nm. [7] Optical plastic folding element (110) according to claim 1, wherein the distance between the first Ag layer (1143) and the underside is Hag1, and the following condition is met: 180 nm <Hag1<460 nm. [8] Optical plastic folding element (110) according to claim 1, wherein the thickness of the barrier layer (1144) is Db, and the following condition is met: 35 nm <Db<120 nm. [9] Optical plastic folding element (110) according to claim 1, wherein an average reflectance, measured from the underside of the reflective layer (114) reflecting at a wavelength of 400 nm to 1000 nm, is R1, and the following condition is met: 85% <R1<100%. [10] Optical plastic folding element (110) according to claim 1, wherein an average reflectance, measured from the top surface of the reflective layer (114) reflecting at a wavelength of 400 nm to 1000 nm, is R2, and the following condition is met: 95% <R2<100%. [11] Optical plastic folding element (110) according to claim 1, wherein a main material of the barrier layer (1144) is nickel. [12] Optical plastic folding element (110) according to claim 1, further comprising: a plurality of connecting surfaces (115) connected to the incident surface (111), the exit surface (113) and the at least one reflecting surface (112), wherein there is a step structure between the at least one reflecting surface (112) and one of the adjacent connecting surfaces (115) to form a height difference between the at least one reflecting surface (112) and the connecting surface (115), the height difference being Hs and the following condition being satisfied: 0.005 mm≤Hs≤0.22 mm. [13] Optical plastic folding element (110) comprising: an incident surface (111), wherein light enters the optical plastic folding element (110) through the incident surface (111); at least one reflective surface (112), wherein the at least one reflective surface (112) serves to change the direction of propagation of the light; an exit surface (113), wherein the light exits the optical plastic folding element (110) from the exit surface (113); and a reflective foil (114) arranged on the at least one reflective surface (112), wherein a bottom side of the reflective foil (114) is in physical contact with the at least one reflective surface (112) and a top side of the reflective foil (114) is arranged relative to the bottom side, wherein the reflective foil (114) comprises, in order from the bottom side to the top side furthest from the at least one reflective surface (112): a first multilayer film (1141) comprising at least one first low-reflective layer (1141a) and at least one first high-reflective layer (1141b), wherein the reflectance of the at least one first high-reflective layer (1141b) is higher than the reflectance of the at least one first low-reflective layer (1141a), and the at least one first high-reflective layer (1141b) and the at least one first low-reflective layer (1141a) are stacked alternately; a first compound layer (1142) containing aluminium oxide; a first Ag layer (1143) containing Argentum; and a barrier layer (1144) containing at least one of the following: nickel, titanium, vanadium, chromium, nickel oxide, titanium oxide, vanadium oxide and chromium oxide; where the thickness of the first multilayer film (1141) is Dmf1, the thickness of the barrier layer (1144) is Db, the distance between the first Ag layer (1143) and the underside is Hag1, and the following conditions are met: 0.1 <Db / Dmf1<0,9; 70 nm <Dmf1<420 nm; und 90 nm <Hag1<550 nm. [14] Optical plastic folding element (110) according to claim 13, wherein the reflective film (114) further comprises: a second Ag layer (1145) containing Argentum, wherein the second Ag layer (1145) is located further away from the at least one reflective surface (112) than the barrier layer (1144) is from the at least one reflective surface (112) and is in physical contact with the barrier layer (1144). [15] Optical plastic folding element (110) according to claim 14, wherein at least one of the incident surface (111), the exit surface (113) and the at least one reflecting surface (112) has a curvature. [16] Optical plastic folding element (210) according to claim 14, wherein the number of the at least one reflective surface (212) is at least two. [17] Optical plastic folding element (110) according to claim 13, wherein the distance between the first Ag layer (1143) and the underside is Hag1, and the following condition is met: 180 nm <Hag1<460 nm. [18] Optical plastic folding element (110) according to claim 13, wherein the thickness of the barrier layer (1144) is Db, and the following condition is met: 35 nm <Db<120 nm. [19] Optical plastic folding element (110) according to claim 18, wherein the thickness of the first multilayer film (1141) is Dmf1, the thickness of the barrier layer (1144) is Db, and the following condition is met: 0.1 <Db / Dmf1<0,4. [20] Optical plastic folding element (110) according to claim 13, wherein an average reflectance, measured from the underside of the reflective layer (114) reflecting at a wavelength of 400 nm to 1000 nm, is R1, and the following condition is met: 85% <R1<100%. [21] Optical plastic folding element (110) according to claim 14, wherein an average reflectance, measured from the top of the reflective layer (114) reflecting at a wavelength of 400 nm to 1000 nm, is R2, and the following condition is met: 95% <R2<100%. [22] Optical plastic folding element (110) according to claim 13, wherein a main material of the barrier layer (1144) is nickel. [23] Optical plastic folding element (110) according to claim 13, further comprising: a plurality of connecting surfaces (115) connected to the incident surface (111), the exit surface (113) and the at least one reflecting surface (112), wherein there is a step structure between the at least one reflecting surface (112) and one of the adjacent connecting surfaces (115) to form a height difference between the at least one reflecting surface (112) and the connecting surface (115), the height difference being Hs and the following condition being satisfied: 0.005 mm≤Hs≤0.22 mm. [24] Imaging lens module (100) comprising: the optical plastic folding element (110) according to claim 1 or claim 13. [25] Electronic device (40) comprising: the imaging lens module (100) according to claim 24.

Images