Microstructured optical member and optical lens module

Abstract

A microstructured optical component includes: a low-reflection optical surface, the low-reflection optical surface defining a cross section, the cross section having multiple peaks and multiple troughs distributed thereon, the cross section defining a maximum wave height and a virtual horizontal half-height line, the maximum wave height being the vertical distance between a highest wave peak and a lowest wave trough, the vertical distance between the virtual horizontal half-height line and the highest wave peak being half the maximum wave height distance, wherein the cross section has multiple main protrusions and multiple micro protrusions, the multiple wave peaks being respectively located at the multiple main protrusions and the multiple micro protrusions, the wave peak position of each of the main protrusions being higher than the virtual horizontal half-height line, and the wave peak position of each of the micro protrusions being lower than the virtual horizontal half-height line. An optical lens module provided in another embodiment includes the microstructured optical component.

Description

Technical Field

[0001] This utility model relates to an optical lens; in particular, it refers to an optical component with a microstructure. Background Technology

[0002] With the rapid advancement of camera technology, lens modules have been widely used in various camera devices, especially with the increasing integration of them with various portable electronic devices (such as smartphones, laptops, and tablets). As a key component of the photosensitive imaging system, the design and performance of the lens module have a decisive impact on the overall image quality of the camera device.

[0003] However, existing lens modules still commonly face the problem of stray light in practical applications. Stray light refers to light that enters the sensing element without traveling along a designed path. This type of light may originate from non-ideal reflections from the surface of optical elements (such as excess reflections or transmissions from the lens surface) or secondary reflections caused by non-optical element surfaces (such as the inner wall of the lens barrel, fixed structures, etc.). This type of stray light easily leads to image quality degradation. Specifically, it causes a decrease in the modulation transfer function (MTF) of the lens module, thereby affecting image sharpness, tonal gradation, and color saturation, limiting the development of lens modules in high-quality video applications. Summary of the Invention

[0004] In view of this, the present invention provides a microstructured optical component that has the function of dispersing stray light, thereby eliminating stray light from entering the lens barrel.

[0005] To achieve the above objectives, the present invention provides a microstructured optical component, which is selected from one or a combination of a group consisting of a lens barrel, a lens, and a spacer ring. The microstructured optical component includes: a low-reflection optical surface having a microstructured region, wherein the microstructured region is an area region of 0.3mm x 0.3mm arbitrarily selected on the low-reflection optical surface; a cross-section is defined within the microstructured region, the cross-section corresponding to the side length direction of the microstructured region; multiple peaks and multiple troughs are distributed on the cross-section; the cross-section defines a maximum peak height and a virtual horizontal half-height line; the maximum peak height is the vertical distance between the highest peak and the lowest trough among the multiple peaks; the vertical distance between the virtual horizontal half-height line and the highest peak is half the maximum peak height distance; and the virtual horizontal half-height line is located at... Between the highest peak and the lowest trough, the cross section has multiple main protrusions and multiple micro protrusions. The multiple peaks are located at the multiple main protrusions and the multiple micro protrusions, respectively. The peak position of each main protrusion is higher than the virtual horizontal half-height line, and the peak position of each micro protrusion is lower than the virtual horizontal half-height line. The cross section satisfies the following conditions: 0.6μm≤H≤18μm; 5≤N≤20; 3≤M≤20; and 1 / 5H≤A≤1 / 2H; where H is the maximum peak height; N is the number of the multiple main protrusions in the cross section; M is the number of the multiple micro protrusions in the cross section; each micro protrusion is located between two adjacent troughs, and one of the two adjacent troughs is lower than the other, which is a lower trough. A is the vertical distance between the peak of each micro protrusion and the lower trough.

[0006] Another embodiment of the present invention provides an optical lens module comprising a lens barrel, a lens group, an aperture, and a spacer ring; the lens barrel has an object-side opening; the lens group is disposed inside the lens barrel, and the lens group includes multiple lenses along an optical axis from the object side to the image side from the object side opening; the aperture is installed inside the lens barrel, and the aperture is located between the object side and the image side; the spacer ring is installed inside the lens barrel, and the spacer ring surrounds the optical axis and is disposed on one side of the object side or the image side of one of the lenses; wherein one or a combination thereof of the lens barrel, the multiple lenses, and the spacer ring is selected from the aforementioned microstructured optical components.

[0007] The advantage of this invention lies in the fact that the low-reflection optical surface of the microstructured optical component has a microstructured region design, wherein the microstructured region has a plurality of irregularly arranged main protrusions and a plurality of micro protrusions, which effectively disperse stray light. The number of the plurality of main protrusions and the plurality of micro protrusions in the cross section at least satisfies the conditions of 5≤N≤20 and 3≤M≤20, which provides a better effect of optimizing the removal of stray light. The microstructured optical component can be applied to the optical lens module, so that the optical lens module has the function of dispersing stray light, thereby achieving the purpose of eliminating stray light from entering the lens barrel. Attached Figure Description

[0008] The above and other features of this utility model will be described in detail with reference to the accompanying drawings.

[0009] Figure 1A This is a structural diagram of the optical lens module of the first preferred embodiment of the present invention.

[0010] Figure 1B This is a cross-sectional planar analysis diagram of a microstructured optical component according to the first preferred embodiment of the present invention.

[0011] Figure 1C The reflectance curve of the microstructured optical component of the first preferred embodiment of this utility model is shown.

[0012] Figure 2A This is a cross-sectional planar analysis diagram of a microstructured optical component according to the second preferred embodiment of the present invention.

[0013] Figure 2B This is a reflectance curve of a microstructured optical component according to the second preferred embodiment of the present invention.

[0014] Figure 3A This is a cross-sectional planar analysis diagram of a microstructured optical component according to the third preferred embodiment of the present invention.

[0015] Figure 3B The reflectance curve of the microstructured optical component is shown in the third preferred embodiment of this utility model.

[0016] Figure 4A This is a cross-sectional planar analysis diagram of a microstructured optical component according to the fourth preferred embodiment of the present invention.

[0017] Figure 4B The reflectance curve of the microstructured optical component of the fourth preferred embodiment of this utility model is shown.

[0018] Figure 5A This is a cross-sectional planar analysis diagram of a microstructured optical component according to the fifth preferred embodiment of the present invention.

[0019] Figure 5B This is a reflectance curve of a microstructured optical component according to the fifth preferred embodiment of the present invention.

[0020] Figure 6A This is a cross-sectional planar analysis diagram of a microstructured optical component according to the sixth preferred embodiment of the present invention.

[0021] Figure 6B This is a reflectance curve of a microstructured optical component according to the sixth preferred embodiment of the present invention.

[0022] Figure 7A This is a cross-sectional planar analysis diagram of a microstructured optical component according to the seventh preferred embodiment of the present invention.

[0023] Figure 7B The reflectance curve of the microstructured optical component is shown in the seventh preferred embodiment of this utility model.

[0024] Figure 8A This is a cross-sectional planar analysis diagram of the microstructured optical component of the eighth preferred embodiment of the present invention.

[0025] Figure 8B This is a reflectance curve of the microstructured optical component of the eighth preferred embodiment of the present invention.

[0026] Figure 9A This is a cross-sectional planar analysis diagram of a microstructured optical component according to the ninth preferred embodiment of the present invention.

[0027] Figure 9B This is a reflectance curve of a microstructured optical component according to the ninth preferred embodiment of the present invention.

[0028] Figure 10A This is a cross-sectional planar analysis diagram of a microstructured optical component according to the tenth preferred embodiment of this utility model.

[0029] Figure 10B This is a reflectance curve of a microstructured optical component according to the tenth preferred embodiment of the present invention.

[0030] Figure 11A This is a cross-sectional planar analysis diagram of the microstructured optical component of the eleventh preferred embodiment of the present invention.

[0031] Figure 11B The reflectance curve of the microstructured optical component of the eleventh preferred embodiment of this utility model is shown.

[0032] Figure 12A This is a cross-sectional planar analysis diagram of a microstructured optical component according to the twelfth preferred embodiment of the present invention.

[0033] Figure 12BThis is a reflectance curve of the microstructured optical component of the twelfth preferred embodiment of the present invention.

[0034] Figure 13A This is a cross-sectional planar analysis diagram of a microstructured optical component according to the thirteenth preferred embodiment of this utility model.

[0035] Figure 13B This is a reflectance curve of the microstructured optical component of the thirteenth preferred embodiment of the present invention.

[0036] Figure 14A This is a cross-sectional planar analysis diagram of a microstructured optical component according to the fourteenth preferred embodiment of the present invention.

[0037] Figure 14B This is a reflectance curve of the microstructured optical component according to the fourteenth preferred embodiment of the present invention.

[0038] Figure 15A This is a cross-sectional planar analysis diagram of a microstructured optical component according to the fifteenth preferred embodiment of this utility model.

[0039] Figure 15B This is a reflectance curve of a microstructured optical component according to the fifteenth preferred embodiment of the present invention.

[0040] Figure 16A This is a cross-sectional planar analysis diagram of a microstructured optical component according to the sixteenth preferred embodiment of the present invention.

[0041] Figure 16B This is a reflectance curve of a microstructured optical component according to the sixteenth preferred embodiment of the present invention.

[0042] Figure 17A This is a cross-sectional planar analysis diagram of a microstructured optical component according to the seventeenth preferred embodiment of the present invention.

[0043] Figure 17B This is a reflectance curve of the microstructured optical component according to the seventeenth preferred embodiment of the present invention.

[0044] Figure 18A This is a cross-sectional planar analysis diagram of a microstructured optical component according to the eighteenth preferred embodiment of the present invention.

[0045] Figure 18B This is a reflectance curve of the microstructured optical component of the eighteenth preferred embodiment of the present invention.

[0046] Figure 19A This is a cross-sectional planar analysis diagram of a microstructured optical component according to the nineteenth preferred embodiment of the present invention.

[0047] Figure 19BThis is a reflectance curve of a microstructured optical component according to the nineteenth preferred embodiment of the present invention.

[0048] Figure 20A This is a cross-sectional planar analysis diagram of a microstructured optical component according to the twentieth preferred embodiment of the present invention.

[0049] Figure 20B The reflectance curve of the microstructured optical component of the twentieth preferred embodiment of this utility model is shown.

[0050] Explanation of reference numerals in the attached figures

[0051] 100: Optical lens module

[0052] 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2100: with microstructured optical components

[0053] 210: Low-reflection optical surface

[0054] 220, 320, 420, 520, 620, 720, 820, 920, 1020, 1120, 1220, 1320, 1420, 1520, 1620, 1720, 1820, 1920, 2020, 2120: Microstructural regions

[0055] 230, 330, 430, 530, 630, 730, 830, 930, 1030, 1130, 1230, 1330, 1430, 1530, 1630, 1730, 1830, 1930, 2030, 2130: Cross-section

[0056] 10: Lens tube

[0057] 11: Object side opening

[0058] 12: Sunshade ring

[0059] 13: Mirror base

[0060] 20: Lens Group

[0061] 21: Lens

[0062] 21A: Effective optical area

[0063] 21B: Optical Invalid Region

[0064] 211: Side view of the object

[0065] 212: Like the side view

[0066] 30: Spacer ring

[0067] 40: Aperture

[0068] 50: Optical sensing element

[0069] Z: Optical axis

[0070] H: Maximum wave height

[0071] X: Virtual horizontal half-height line

[0072] T1: Main protrusion

[0073] T2: Slightly protruding part

[0074] P: Peak

[0075] P1: Peak

[0076] P2: Lower peak

[0077] C: trough

[0078] C1: Lowest trough

[0079] C2: Lower trough

[0080] A: The vertical distance between the peaks and troughs of each of the micro-protrusions.

[0081] D: The vertical distance between each trough and the lower peak. Detailed Implementation

[0082] To more clearly illustrate this utility model, preferred embodiments are described in detail below with reference to the accompanying drawings. Please refer to... Figure 1A The optical lens module 100 of the first preferred embodiment of the present invention includes a lens barrel 10, a lens group 20, a plurality of spacer rings 30, an aperture 40 and an optical sensing element 50.

[0083] The lens barrel 10 is hollow inside and made of opaque material. An object-side opening 11 extends through the lens barrel 10, connecting to the interior of the lens barrel 10 to allow the passage of an optical axis Z. The lens barrel 10 has a light-shielding ring 12, which is radially recessed at one end of the lens barrel 10 and surrounds the optical axis Z. The object-side opening 11 is located inside the light-shielding ring 12. The lens barrel 10 has a lens mount 13, which is attached to the other end of the lens barrel 10 opposite to the light-shielding ring 12. In this embodiment, the lens mount 13 is integrally formed into the lens barrel 10. In other embodiments, the lens mount 13 is detachably assembled onto the lens barrel 10.

[0084] The lens group 20 is installed inside the lens barrel 10. The lens group 20 includes multiple lenses 21 and an imaging plane (not shown) extending from the object-side opening 11 along the optical axis Z from the object side to the image side. The multiple lenses 21 each have refractive power and are arranged sequentially inside the lens barrel 10. In the first embodiment, the number of lenses 21 is described as four, but this is not a limitation. In other embodiments, the lens 21 may be at least one. Figure 1A As shown, each of the lenses 21 has an optically effective region 21A and an optically ineffective region 21B. The optically effective region 21A corresponds to the position of the object-side aperture 11, and the optical axis Z passes through the optically effective region 21A of each of the lenses 21. The optically ineffective region 21B surrounds the optically effective region 21A.

[0085] The spaced rings 30 are made of opaque material and are installed inside the lens barrel 10. The spaced rings 30 surround the optical axis Z, and each spaced ring 30 is disposed on one side of the object side 211 and the image side 212 of each lens 21. For example, each spaced ring 30 is disposed between the object side 211 and the image side 212 of one of two adjacent lenses 21. If the lens 21 is close to the light-shielding ring 12 of the lens barrel 10, the spaced ring 30 is disposed on the object side 211 of the lens 21 and abuts against the light-shielding ring 12. However, this is not a limitation. In other embodiments, there may be at least one spaced ring 30, and the spaced ring 30 may be disposed on one side of the object side 211 or the image side 212 of one of the lenses 21.

[0086] The aperture 40 is installed inside the lens barrel 10. The aperture 40 is located between the object side and the image side of the lens group 20. In the first embodiment, the aperture 40 surrounds the optical axis Z and is located between two adjacent lenses 21.

[0087] The optical sensing element 50 is disposed inside the lens barrel 10. The optical sensing element 50 is mounted on the lens mount 13 and is located on the imaging surface of the lens group 20. The imaging light can pass through the lens group 20 along the optical axis Z and be projected onto the optical sensing element 50. When the optical sensing element 50 detects the light and converts it into an electrical signal, the optical sensing element 50 transmits the electrical signal to other external components for subsequent processing. In other embodiments, the optical sensing element 50 may be omitted.

[0088] In addition, the first preferred embodiment also includes a microstructured optical component 200, which can be applied to the optical lens module 100. The microstructured optical component 200 is selected from one or a combination of the group consisting of the lens barrel 10, the plurality of lenses 21 and the equally spaced ring 30. This means that the lens barrel 10, the plurality of lenses 21 or the equally spaced ring 30 can be used as the microstructured optical component 200, or two or more combinations of the lens barrel 10, the plurality of lenses 21 and the equally spaced ring 30 can be used as the microstructured optical component 200. In the first embodiment, the microstructured optical component 200 is described with the lens barrel 10 as an example.

[0089] like Figure 1A As shown, the microstructured optical component 200 includes a low-reflection optical surface 210. In a preferred embodiment, when the lens barrel 10 is the microstructured optical component 200, the low-reflection optical surface 210 is located on the entire surface of the light-shielding ring 12 and the inner edge of the object-side opening 11, or the low-reflection optical surface 210 may also be located on one of the light-shielding ring 12 and the object-side opening 11. In another embodiment, when the plurality of lenses 21 are each the microstructured optical component 200, the low-reflection optical surface 210 is located... The optically ineffective region 21B of each of the lenses 21 is not limited thereto. In other embodiments, the lens 21 may be at least one of the microstructured optical components 200. In another embodiment, when the spaced ring 30 is the microstructured optical component 200, the low-reflection optical surface 210 is located on an inner ring surface 31 of the spaced ring 30, the inner ring surface 31 being surrounding the optical axis Z. However, this is not limited thereto. In other embodiments, the spaced ring 30 may be at least one of the microstructured optical components 200.

[0090] More specifically, the low-reflection optical surface 210 has a microstructure region 220, which is an area region of 0.3mm * 0.3mm arbitrarily selected on the low-reflection optical surface 210. The microstructure region 220 defines a cross-section 230, which corresponds to the side length direction of the microstructure region 220, i.e., the length of the cross-section 230 is 0.3mm. In the first embodiment, the cross-section 230 of the microstructure region 220 is measured using a white light interferometer for planar analysis, such as... Figure 1BAs shown, the cross section 230 has multiple wave peaks P and multiple wave troughs C. The cross section 230 defines a maximum wave height H and a virtual horizontal half-height line X. The maximum wave height H is the vertical distance between the highest wave peak P1 and the lowest wave trough C1 among the multiple wave peaks P and C1, respectively. The highest wave peak P1 is the highest position among the multiple wave peaks P, and the lowest wave trough C1 is the lowest position among the multiple wave troughs C. The virtual horizontal half-height line X is the distance between the highest wave peak P1 and C1. The vertical distance of P1 is half of the maximum wave height H distance, and the virtual horizontal half-height line X is located between the highest wave peak P1 and the lowest wave trough C1. The cross section 230 has multiple main protrusions T1 and multiple micro protrusions T2. The multiple wave peaks P are located at the multiple main protrusions T1 and the multiple micro protrusions T2, respectively. The position of the wave peak P of each main protrusion T1 is higher than the virtual horizontal half-height line X, and the position of the wave peak P of each micro protrusion T2 is lower than the virtual horizontal half-height line X.

[0091] To ensure that the microstructure region 220 has a good effect on eliminating scattered light, in the first embodiment, the cross section 230 meets the following condition:

[0092] (1) 0.6μm≤H≤18μm;

[0093] (2) 5≤N≤20;

[0094] (3) 3≤M≤20;

[0095] (4) 0.5μm <Ra<3μm;

[0096] (5) 0.07% ≤ R ≤ 1.150%;

[0097] (6) 5μm≤b≤100μm.

[0098] Where H is the maximum wave height; N is the number of the plurality of main protrusions T1 on the cross section 230; M is the number of the plurality of micro protrusions T2 on the cross section 230; Ra is the surface roughness of the cross section 230; R is the surface reflectivity of the cross section 230; b is the distance between two adjacent valleys C; when the low-reflection optical surface 210 is at a wavelength of 555nm, the cross section 230 satisfies the following condition: R≤1.130%.

[0099] like Figure 1B , 1CAs shown, the maximum wave height H of the cross-section 230 is measured to be 12 μm. The number of the plurality of main protrusions T1 in the cross-section 230 is N = 14, the number of the plurality of micro protrusions T2 in the cross-section 230 is M = 10, the surface roughness Ra of the cross-section 230 is measured to be 2.217 μm, the distance b between two adjacent wave valleys C is between 10 μm and 100 μm, and the surface reflectivity R of the cross-section 230 is between 0.14% and 1.090%. When the low-reflectivity optical surface 210 is at a wavelength of 555 nm, the surface reflectivity R of the cross-section 230 is 1.060%. Therefore, the specific values ​​of the conditional expression for the aforementioned cross-section 230 in the first embodiment are as follows:

[0100] (1) H = 12 μm;

[0101] (2) N = 14;

[0102] (3) M = 10;

[0103] (4) Ra=2.217μm;

[0104] (5) 0.14% ≤ R ≤ 1.090%;

[0105] (6) 10μm≤b≤100μm.

[0106] Thus, the first embodiment satisfies the conditional expressions for points (1) to (6) set by the aforementioned section 230; in addition, the section 230 also satisfies the following conditions: S1≤S2; D>1 / 4H; and 1 / 5H≤A≤1 / 2H; where S1 is the total area of ​​the plurality of main protrusions T1 protruding from the virtual horizontal half-height line X; S2 is the total area of ​​the plurality of main protrusions T1 below the virtual horizontal half-height line X and the plurality of micro protrusions T2; each of the troughs C is located in the phase Between two adjacent wave peaks P, one of the two adjacent wave peaks P is lower than the other wave peak P, which is a lower wave peak P2. D is the vertical distance between each wave trough C and the lower wave peak P2. Each micro protrusion T2 is located between two adjacent wave troughs C. One of the two adjacent wave troughs C is lower than the other wave trough C, which is a lower wave trough C2. A is the vertical distance between the wave peak P of each micro protrusion T2 and the lower wave trough C2.

[0107] In addition, the microstructure region 220 satisfies the following conditions: 25 ≤ N ≤ 400; 9 ≤ M ≤ 400; 0.5 μm < Sa < 3 μm; where N is the number of the plurality of main protrusions T1 in the microstructure region 220; M is the number of the plurality of micro protrusions T2 in the microstructure region 220; Sa is the surface roughness of the microstructure region 220; in the first embodiment, the number N of the plurality of main protrusions T1 in the microstructure region 220 is 196, the number M of the plurality of micro protrusions T2 in the microstructure region 220 is 100, and the measured surface roughness Sa of the microstructure region 220 is 2.1 μm.

[0108] Thus, the low-reflection optical surface 210 of the microstructured optical member 200 has a design of the microstructure region 220, and the microstructure region 220 has the plurality of main protrusions T1 and the plurality of micro protrusions T2 arranged irregularly, effectively dispersing stray light. The number of the plurality of main protrusions T1 and the plurality of micro protrusions T2 in the cross section 230 satisfies at least the conditions of 5 ≤ N ≤ 20 and 3 ≤ M ≤ 20, further providing a good effect of optimizing the removal of stray light. The microstructured optical member 200 can be applied to the optical lens module 100 of the first embodiment, enabling the optical lens module 100 to have the function of dispersing stray light and achieving the purpose of preventing stray light from entering the lens barrel 10.

[0109] Please refer to Figure 2A , which is the microstructured optical member 300 of the second preferred embodiment of the present invention. The microstructured optical member 300 is applied to the optical lens module 100 of the aforementioned first embodiment. The microstructured optical member 300 can also be selected from one or a combination of the group consisting of the lens barrel 10, the plurality of lenses 21, and the equal-spacing rings 30.

[0110] The microstructured optical member 300 includes a low-reflection optical surface (not shown in the figure). The low-reflection optical surface is located on the surface of the lens barrel 10, each of the lenses 21, or each of the spacer rings 30. The low-reflection optical surface has a microstructure region 320, and the microstructure region 320 is an area region arbitrarily composed of 0.3 mm * 0.3 mm on the low-reflection optical surface. The microstructure region 320 defines a cross section 330, and the cross section 330 corresponds to the side length direction of the microstructure region 320. In the second embodiment, the microstructure region 320 is measured by a white light interferometer for planar analysis of the cross section 330.

[0111] As Figure 2AAs shown, the cross section 330 has multiple wave peaks P and multiple wave troughs C. The cross section 330 defines a maximum wave height H and a virtual horizontal half-height line X. The maximum wave height H is the vertical distance between the highest wave peak P1 and the lowest wave trough C1 among the multiple wave peaks P and C1, respectively. The highest wave peak P1 is the highest position among the multiple wave peaks P, and the lowest wave trough C1 is the lowest position among the multiple wave troughs C. The virtual horizontal half-height line X is the distance between the highest wave peak P1 and C1. The vertical distance of P1 is half of the maximum wave height H distance, and the virtual horizontal half-height line X is located between the highest wave peak P1 and the lowest wave trough C1. The cross section 330 has multiple main protrusions T1 and multiple micro protrusions T2. The multiple wave peaks P are located at the multiple main protrusions T1 and the multiple micro protrusions T2, respectively. The position of the wave peak P of each main protrusion T1 is higher than the virtual horizontal half-height line X, and the position of the wave peak P of each micro protrusion T2 is lower than the virtual horizontal half-height line X.

[0112] To ensure that the microstructure region 320 has a good effect on eliminating scattered light, in the second embodiment, the cross section 330 meets the following condition:

[0113] (1) 0.6μm≤H≤18μm;

[0114] (2) 5≤N≤20;

[0115] (3) 3≤M≤20;

[0116] (4) 0.5μm <Ra<3μm;

[0117] (5) 0.07% ≤ R ≤ 1.150%;

[0118] (6) 5μm≤b≤100μm.

[0119] Where H is the maximum wave height; N is the number of the plurality of main protrusions T1 in the cross section 330; M is the number of the plurality of micro protrusions T2 in the cross section 330; Ra is the surface roughness of the cross section 330; R is the surface reflectivity of the cross section 330; b is the distance between two adjacent valleys C; when the low-reflectivity optical surface is at a wavelength of 555nm, the cross section 330 satisfies the following condition: R≤1.130%.

[0120] like Figure 2A , 2BAs shown, the maximum wave height H of the cross-section 330 is measured to be 9.5 μm. The number of the plurality of main protrusions T1 in the cross-section 330 is N = 9, the number of the plurality of micro protrusions T2 in the cross-section 330 is M = 7, the surface roughness Ra of the cross-section 330 is measured to be 1.829 μm, the distance b between two adjacent wave valleys C is between 15 μm and 40 μm, and the surface reflectivity R of the cross-section 330 is between 0.08 and 1.040%. When the low-reflectivity optical surface is at a wavelength of 555 nm, the surface reflectivity R of the cross-section 330 is 0.990%. Therefore, the specific values ​​of the aforementioned conditional expression for the cross-section 330 in the second embodiment are as follows:

[0121] (1) H = 9.5 μm;

[0122] (2) N = 9;

[0123] (3) M = 7;

[0124] (4) Ra=1.829μm;

[0125] (5) 0.08% ≤ R ≤ 1.040%;

[0126] (6) 15μm≤b≤40μm.

[0127] Thus, the second embodiment satisfies the conditional expressions for points (1) to (6) set by the aforementioned section 330; in addition, the section 330 also satisfies the following conditions: S1≤S2; D>1 / 4H; and 1 / 5H≤A≤1 / 2H; where S1 is the total area of ​​the plurality of main protrusions T1 protruding from the virtual horizontal half-height line X; S2 is the total area of ​​the plurality of main protrusions T1 below the virtual horizontal half-height line X and the plurality of micro protrusions T2; each of the troughs C is located in the phase Between two adjacent wave peaks P, one of the two adjacent wave peaks P is lower than the other wave peak P, which is a lower wave peak P2. D is the vertical distance between each wave trough C and the lower wave peak P2. Each micro protrusion T2 is located between two adjacent wave troughs C. One of the two adjacent wave troughs C is lower than the other wave trough C, which is a lower wave trough C2. A is the vertical distance between the wave peak P of each micro protrusion T2 and the lower wave trough C2.

[0128] In addition, the micro-structure region 320 satisfies the following conditions: 25 ≤ N ≤ 400; 9 ≤ M ≤ 400; 0.5 μm < Sa < 3 μm; where N is the number of the plurality of main protrusions T1 in the micro-structure region 320; M is the number of the plurality of micro-protrusions T2 in the micro-structure region 320; Sa is the surface roughness of the cross-section 330; in the second embodiment, the number N of the plurality of main protrusions T1 in the micro-structure region 320 is 81, the number M of the plurality of micro-protrusions T2 in the micro-structure region 320 is 49, and the measured surface roughness Sa of the micro-structure region 320 is 1.97 μm.

[0129] Thus, the micro-structured optical member 300 having the design of the micro-structure region 320 can effectively disperse stray light and provide a good effect of optimizing the removal of stray light. Moreover, when the micro-structured optical member 300 is applied to the optical lens module 100 of the first embodiment, the optical lens module 100 has the function of dispersing stray light, achieving the purpose of preventing stray light from entering the lens barrel 10.

[0130] Please refer to Figure 3A , which is the micro-structured optical member 400 of the third preferred embodiment of the present invention. The micro-structured optical member 400 is applied to the optical lens module 100 of the aforementioned first embodiment. The micro-structured optical member 400 can also be selected from one or a combination of the group consisting of the lens barrel 10, the plurality of lenses 21, and the equal-spacing rings 30.

[0131] The micro-structured optical member 400 includes a low-reflection optical surface (not shown in the figure). The low-reflection optical surface is located on the surface of the lens barrel 10, each of the lenses 21, or each of the spacer rings 30. The low-reflection optical surface has a micro-structure region 420. The micro-structure region 420 is an area region arbitrarily formed by 0.3 mm * 0.3 mm on the low-reflection optical surface. The micro-structure region 420 defines a cross-section 430. The cross-section 430 corresponds to the side length direction of the micro-structure region 420. In the third embodiment, the cross-section 430 of the micro-structure region 420 is analyzed in a plane by using a white light interferometer for measurement.

[0132] As Figure 3AAs shown, multiple wave peaks P and multiple wave troughs C are distributed on the cross section 430. The cross section 430 defines a maximum wave height H and a virtual horizontal half-height line X. The maximum wave height H is the vertical distance between the highest wave peak P1 and the lowest wave trough C1 among the multiple wave peaks P and C1, respectively. The highest wave peak P1 is the highest position among the multiple wave peaks P, and the lowest wave trough C1 is the lowest position among the multiple wave troughs C. The virtual horizontal half-height line X is the distance between the highest wave peak P1 and C1. The vertical distance of P1 is half of the maximum wave height H distance, and the virtual horizontal half-height line X is located between the highest wave peak P1 and the lowest wave trough C1. The cross section 430 has multiple main protrusions T1 and multiple micro protrusions T2. The multiple wave peaks P are located at the multiple main protrusions T1 and the multiple micro protrusions T2, respectively. The position of the wave peak P of each main protrusion T1 is higher than the virtual horizontal half-height line X, and the position of the wave peak P of each micro protrusion T2 is lower than the virtual horizontal half-height line X.

[0133] To ensure that the microstructure region 420 has a good effect on eliminating scattered light, in the third embodiment, the cross section 430 meets the following condition:

[0134] (1) 0.6μm≤H≤18μm;

[0135] (2) 5≤N≤20;

[0136] (3) 3≤M≤20;

[0137] (4) 0.5μm <Ra<3μm;

[0138] (5) 0.07% ≤ R ≤ 1.150%;

[0139] (6) 5μm≤b≤100μm.

[0140] Where H is the maximum wave height; N is the number of the plurality of main protrusions T1 in the cross section 430; M is the number of the plurality of micro protrusions T2 in the cross section 430; Ra is the surface roughness of the cross section 430; R is the surface reflectivity of the cross section 430; b is the distance between two adjacent valleys C; when the low-reflectivity optical surface is at a wavelength of 555nm, the cross section 430 satisfies the following condition: R≤1.130%.

[0141] like Figure 3A , 3BAs shown, the maximum wave height H of the cross section 430 is measured to be 11 μm. The number of the plurality of main protrusions T1 in the cross section 430 is N = 11, the number of the plurality of micro protrusions T2 in the cross section 430 is M = 11, the surface roughness Ra of the cross section 430 is measured to be 1.942 μm, the distance b between two adjacent wave valleys C is between 12 μm and 40 μm, and the surface reflectivity R of the cross section 430 is between 0.110% and 1.070%. When the low-reflectivity optical surface is at a wavelength of 555 nm, the surface reflectivity R of the cross section 430 is 1.010%. Therefore, the specific values ​​of the aforementioned conditional expression for the cross section 430 in the third embodiment are as follows:

[0142] (1) H = 11 μm;

[0143] (2) N = 11;

[0144] (3) M = 11;

[0145] (4) Ra=1.942μm;

[0146] (5) 0.110% ≤ R ≤ 1.070%;

[0147] (6) 12μm≤b≤40μm.

[0148] Thus, the third embodiment satisfies the conditional expressions for points (1) to (6) set by the aforementioned section 430; in addition, the section 430 also satisfies the following conditions: S1≤S2; D>1 / 4H; and 1 / 5H≤A≤1 / 2H; where S1 is the total area of ​​the plurality of main protrusions T1 protruding from the virtual horizontal half-height line X; S2 is the total area of ​​the plurality of main protrusions T1 below the virtual horizontal half-height line X and the plurality of micro protrusions T2; each of the troughs C is located in the phase Between two adjacent wave peaks P, one of the two adjacent wave peaks P is lower than the other wave peak P, which is a lower wave peak P2. D is the vertical distance between each wave trough C and the lower wave peak P2. Each micro protrusion T2 is located between two adjacent wave troughs C. One of the two adjacent wave troughs C is lower than the other wave trough C, which is a lower wave trough C2. A is the vertical distance between the wave peak P of each micro protrusion T2 and the lower wave trough C2.

[0149] In addition, the microstructure region 420 satisfies the following conditions: 25 ≤ N ≤ 400; 9 ≤ M ≤ 400; 0.5 μm < Sa < 3 μm; where N is the number of the plurality of main protrusions T1 in the microstructure region 420; M is the number of the plurality of micro protrusions T2 in the microstructure region 420; Sa is the surface roughness of the microstructure region 420; in the third embodiment, the number N of the plurality of main protrusions T1 in the microstructure region 420 is 121, and the number M of the plurality of micro protrusions T2 in the microstructure region 420 is 121; the measured surface roughness Sa of the microstructure region 420 is 2.18 μm.

[0150] Therefore, the microstructured optical member 400 with the designed microstructure region 420 can effectively disperse stray light, providing a good effect of optimizing the removal of stray light. Moreover, when the microstructured optical member 400 is applied to the optical lens module 100 of the first embodiment, the optical lens module 100 has the function of dispersing stray light, achieving the purpose of preventing stray light from entering the lens barrel 10.

[0151] Please refer to Figure 4A , which is the microstructured optical member 500 of the fourth preferred embodiment of the present invention. The microstructured optical member 500 is applied to the optical lens module 100 of the aforementioned first embodiment. The microstructured optical member 500 can also be selected from one or a combination of the group consisting of the lens barrel 10, the plurality of lenses 21, and the equal-spacing rings 30.

[0152] The microstructured optical member 500 includes a low-reflection optical surface (not shown in the figure). The low-reflection optical surface is located on the surface of the lens barrel 10, each of the lenses 21, or each of the spacer rings 30. The low-reflection optical surface has a microstructure region 520. The microstructure region 520 is an area region arbitrarily formed by 0.3 mm * 0.3 mm on the low-reflection optical surface. A cross-section 530 is defined in the microstructure region 520. The cross-section 530 corresponds to the side length direction of the microstructure region 520. In the fourth embodiment, the cross-section 530 of the microstructure region 520 is analyzed in a plane using a white light interferometer for measurement.

[0153] As Figure 4AAs shown, the cross section 530 has multiple wave peaks P and multiple wave troughs C. The cross section 530 defines a maximum wave height H and a virtual horizontal half-height line X. The maximum wave height H is the vertical distance between the highest wave peak P1 and the lowest wave trough C1 among the multiple wave peaks P and C1, respectively. The highest wave peak P1 is the highest position among the multiple wave peaks P, and the lowest wave trough C1 is the lowest position among the multiple wave troughs C. The virtual horizontal half-height line X is the distance between the highest wave peak P1 and C1. The vertical distance of P1 is half of the maximum wave height H distance, and the virtual horizontal half-height line X is located between the highest wave peak P1 and the lowest wave trough C1. The cross section 530 has multiple main protrusions T1 and multiple micro protrusions T2. The multiple wave peaks P are located at the multiple main protrusions T1 and the multiple micro protrusions T2, respectively. The position of the wave peak P of each main protrusion T1 is higher than the virtual horizontal half-height line X, and the position of the wave peak P of each micro protrusion T2 is lower than the virtual horizontal half-height line X.

[0154] To ensure that the microstructure region 520 has a good effect on eliminating scattered light, in the fourth embodiment, the cross section 530 meets the following condition:

[0155] (1) 0.6μm≤H≤18μm;

[0156] (2) 5≤N≤20;

[0157] (3) 3≤M≤20;

[0158] (4) 0.5μm <Ra<3μm;

[0159] (5) 0.07% ≤ R ≤ 1.150%;

[0160] (6) 5μm≤b≤100μm.

[0161] Where H is the maximum wave height; N is the number of the plurality of main protrusions T1 on the cross section 530; M is the number of the plurality of micro protrusions T2 on the cross section 530; Ra is the surface roughness of the cross section 530; R is the surface reflectivity of the cross section 530; b is the distance between two adjacent valleys C; when the low-reflectivity optical surface is at a wavelength of 555nm, the cross section 530 satisfies the following condition: R≤1.130%.

[0162] like Figure 4A , 4BAs shown, the maximum wave height H of the cross-section 530 is measured to be 11 μm. The number of the plurality of main protrusions T1 in the cross-section 530 is N = 11, the number of the plurality of micro protrusions T2 in the cross-section 530 is M = 11, the surface roughness Ra of the cross-section 530 is measured to be 1.878 μm, the distance b between two adjacent wave valleys C is between 12 μm and 40 μm, and the surface reflectivity R of the cross-section 530 is between 0.080 and 1.040%. When the low-reflectivity optical surface is at a wavelength of 555 nm, the surface reflectivity R of the cross-section 530 is 1.000%. Therefore, the specific values ​​of the aforementioned conditional expression for the cross-section 530 in the fourth embodiment are as follows:

[0163] (1) H = 11 μm;

[0164] (2) N = 11;

[0165] (3) M = 11;

[0166] (4) Ra=1.878μm;

[0167] (5) 0.080% ≤ R ≤ 1.040%;

[0168] (6) 12μm≤b≤40μm.

[0169] Thus, the fourth embodiment satisfies the conditional expressions for points (1) to (6) set by the aforementioned section 530; in addition, the section 530 also satisfies the following conditions: S1≤S2; D>1 / 4H; and 1 / 5H≤A≤1 / 2H; where S1 is the total area of ​​the plurality of main protrusions T1 protruding from the virtual horizontal half-height line X; S2 is the total area of ​​the plurality of main protrusions T1 below the virtual horizontal half-height line X and the plurality of micro protrusions T2; each of the troughs C is located in the phase Between two adjacent wave peaks P, one of the two adjacent wave peaks P is lower than the other wave peak P, which is a lower wave peak P2. D is the vertical distance between each wave trough C and the lower wave peak P2. Each micro protrusion T2 is located between two adjacent wave troughs C. One of the two adjacent wave troughs C is lower than the other wave trough C, which is a lower wave trough C2. A is the vertical distance between the wave peak P of each micro protrusion T2 and the lower wave trough C2.

[0170] In addition, the micro-structure region 520 satisfies the following conditions: 25 ≤ N ≤ 400; 9 ≤ M ≤ 400; 0.5 μm < Sa < 3 μm; where N is the number of the plurality of main protrusions T1 in the micro-structure region 520; M is the number of the plurality of micro-protrusions T2 in the micro-structure region 520; Sa is the surface roughness of the cross-section 530; in the fourth embodiment, the number N of the plurality of main protrusions T1 in the micro-structure region 520 is 121, the number M of the plurality of micro-protrusions T2 in the micro-structure region 520 is 121, and the measured surface roughness Sa of the micro-structure region 520 is 2.18 μm.

[0171] Thus, the micro-structured optical member 500 having the design of the micro-structure region 520 can effectively disperse stray light and provide a good effect of optimizing the removal of stray light. Moreover, when the micro-structured optical member 500 is applied to the optical lens module 100 of the first embodiment, the optical lens module 100 has the function of dispersing stray light, achieving the purpose of preventing stray light from entering the lens barrel 10.

[0172] Please refer to Figure 5A , which is the micro-structured optical member 600 of the fifth preferred embodiment of the present invention. The micro-structured optical member 600 is applied to the optical lens module 100 of the aforementioned first embodiment. The micro-structured optical member 600 can also be selected from one or a combination of the group consisting of the lens barrel 10, the plurality of lenses 21, and the equal-spacing rings 30.

[0173] The micro-structured optical member 600 includes a low-reflection optical surface (not shown in the figure). The low-reflection optical surface is located on the surface of the lens barrel 10, each of the lenses 21, or each of the spacer rings 30. The low-reflection optical surface has a micro-structure region 620. The micro-structure region 620 is an area region arbitrarily formed by 0.3 mm * 0.3 mm on the low-reflection optical surface. The micro-structure region 620 defines a cross-section 630. The cross-section 630 corresponds to the side length direction of the micro-structure region 620. In the fifth embodiment, the cross-section 630 of the micro-structure region 620 is analyzed in a plane by using a white light interferometer for measurement.

[0174] As Figure 5AAs shown, the cross section 630 has multiple peaks P and multiple troughs C. The cross section 630 defines a maximum wave height H and a virtual horizontal half-height line X. The maximum wave height H is the vertical distance between the highest peak P1 of the multiple peaks P and the lowest trough C1 of the multiple troughs C. The highest peak P1 is the highest position among the multiple peaks P, and the lowest trough C1 is the lowest position among the multiple troughs C. The virtual horizontal half-height line X is the distance between the highest peak P1 and the lowest trough C1. The vertical distance of P1 is half of the maximum wave height H distance, and the virtual horizontal half-height line X is located between the highest wave peak P1 and the lowest wave trough C1. The cross section 630 has multiple main protrusions T1 and multiple micro protrusions T2. The multiple wave peaks P are located at the multiple main protrusions T1 and the multiple micro protrusions T2, respectively. The position of the wave peak P of each main protrusion T1 is higher than the virtual horizontal half-height line X, and the position of the wave peak P of each micro protrusion T2 is lower than the virtual horizontal half-height line X.

[0175] To ensure that the microstructure region 620 has a good effect on eliminating scattered light, in the fifth embodiment, the cross section 630 meets the following condition:

[0176] (1) 0.6μm≤H≤18μm;

[0177] (2) 5≤N≤20;

[0178] (3) 3≤M≤20;

[0179] (4) 0.5μm <Ra<3μm;

[0180] (5) 0.07% ≤ R ≤ 1.150%;

[0181] (6) 5μm≤b≤100μm.

[0182] Where H is the maximum wave height; N is the number of the plurality of main protrusions T1 on the cross section 630; M is the number of the plurality of micro protrusions T2 on the cross section 630; Ra is the surface roughness of the cross section 630; R is the surface reflectivity of the cross section 630; b is the distance between two adjacent valleys C; when the low-reflectivity optical surface is at a wavelength of 555nm, the cross section 630 satisfies the following condition: R≤1.130%.

[0183] like Figure 5A , 5BAs shown, the maximum wave height H of the cross-section 630 is measured to be 14.5 μm. The number of the plurality of main protrusions T1 in the cross-section 630 is N = 7, the number of the plurality of micro protrusions T2 in the cross-section 630 is M = 10, the surface roughness Ra of the cross-section 630 is measured to be 2.697 μm, the distance b between two adjacent wave valleys C is between 12 μm and 40 μm, and the surface reflectivity R of the cross-section 630 is between 0.180% and 1.150%. When the low-reflectivity optical surface is at a wavelength of 555 nm, the surface reflectivity R of the cross-section 630 is 1.130%. Therefore, the specific values ​​of the aforementioned conditional expression for the cross-section 630 in the fifth embodiment are as follows:

[0184] (1) H = 14.5 μm;

[0185] (2) N = 7;

[0186] (3) M = 10;

[0187] (4) Ra=2.697μm;

[0188] (5) 0.180% ≤ R ≤ 1.150%;

[0189] (6) 12μm≤b≤40μm.

[0190] Thus, the fifth embodiment satisfies the conditional expressions for points (1) to (6) set by the aforementioned section 630; in addition, the section 630 also satisfies the following conditions: S1≤S2; D>1 / 4H; and 1 / 5H≤A≤1 / 2H; where S1 is the total area of ​​the plurality of main protrusions T1 protruding from the virtual horizontal half-height line X; S2 is the total area of ​​the plurality of main protrusions T1 below the virtual horizontal half-height line X and the plurality of micro protrusions T2; each of the troughs C is located in the phase Between two adjacent wave peaks P, one of the two adjacent wave peaks P is lower than the other wave peak P, which is a lower wave peak P2. D is the vertical distance between each wave trough C and the lower wave peak P2. Each micro protrusion T2 is located between two adjacent wave troughs C. One of the two adjacent wave troughs C is lower than the other wave trough C, which is a lower wave trough C2. A is the vertical distance between the wave peak P of each micro protrusion T2 and the lower wave trough C2.

[0191] In addition, the micro-structure region 620 satisfies the following conditions: 25 ≤ N ≤ 400; 9 ≤ M ≤ 400; 0.5 μm < Sa < 3 μm; where N is the number of the plurality of main protrusions T1 in the micro-structure region 620; M is the number of the plurality of micro-protrusions T2 in the micro-structure region 620; Sa is the surface roughness of the cross-section 630; in the fifth embodiment, the number N of the plurality of main protrusions T1 in the micro-structure region 620 is 49, the number M of the plurality of micro-protrusions T2 in the micro-structure region 620 is 100, and the measured surface roughness Sa of the micro-structure region 620 is 2.1 μm.

[0192] Thus, the micro-structured optical member 600 having the design of the micro-structure region 620 can effectively disperse stray light and provide a good effect of optimizing the removal of stray light. Moreover, when the micro-structured optical member 600 is applied to the optical lens module 100 of the first embodiment, the optical lens module 100 has the function of dispersing stray light, achieving the purpose of preventing stray light from entering the lens barrel 10.

[0193] Please refer to Figure 6A , which is the micro-structured optical member 700 of the sixth preferred embodiment of the present invention. The micro-structured optical member 700 is applied to the optical lens module 100 of the aforementioned first embodiment. The micro-structured optical member 700 can also be selected from one or a combination of the group consisting of the lens barrel 10, the plurality of lenses 21, and the equal-spacing rings 30.

[0194] The micro-structured optical member 700 includes a low-reflection optical surface (not shown in the figure). The low-reflection optical surface is located on the surface of the lens barrel 10, each of the lenses 21, or each of the spacer rings 30. The low-reflection optical surface has a micro-structure region 720, which is an area region任选 composed of 0.3 mm * 0.3 mm on the low-reflection optical surface. The micro-structure region 720 defines a cross-section 730, and the cross-section 730 corresponds to the side length direction of the micro-structure region 720. In the sixth embodiment, the micro-structure region 720 is analyzed in a plane using a white light interferometer to measure the cross-section 730.

[0195] As Figure 6A It should be noted that there is an unclear expression "任选" in the original text. It is recommended to check and clarify the accurate content for a more accurate translation.As shown, the cross section 730 has multiple wave peaks P and multiple wave troughs C. The cross section 730 defines a maximum wave height H and a virtual horizontal half-height line X. The maximum wave height H is the vertical distance between the highest wave peak P1 and the lowest wave trough C1 among the multiple wave peaks P and C1, respectively. The highest wave peak P1 is the highest position among the multiple wave peaks P, and the lowest wave trough C1 is the lowest position among the multiple wave troughs C. The virtual horizontal half-height line X is the distance between the highest wave peak P1 and C1. The vertical distance of P1 is half of the maximum wave height H distance, and the virtual horizontal half-height line X is located between the highest wave peak P1 and the lowest wave trough C1. The cross section 730 has multiple main protrusions T1 and multiple micro protrusions T2. The multiple wave peaks P are located at the multiple main protrusions T1 and the multiple micro protrusions T2, respectively. The position of the wave peak P of each main protrusion T1 is higher than the virtual horizontal half-height line X, and the position of the wave peak P of each micro protrusion T2 is lower than the virtual horizontal half-height line X.

[0196] To ensure that the microstructure region 720 has a good effect on eliminating scattered light, in the sixth embodiment, the cross section 730 meets the following condition:

[0197] (1) 0.6μm≤H≤18μm;

[0198] (2) 5≤N≤20;

[0199] (3) 3≤M≤20;

[0200] (4) 0.5μm <Ra<3μm;

[0201] (5) 0.07% ≤ R ≤ 1.150%;

[0202] (6) 5μm≤b≤100μm.

[0203] Where H is the maximum wave height; N is the number of the plurality of main protrusions T1 in the cross section 730; M is the number of the plurality of micro protrusions T2 in the cross section 730; Ra is the surface roughness of the cross section 730; R is the surface reflectivity of the cross section 730; b is the distance between two adjacent wave valleys C; when the low-reflectivity optical surface is at a wavelength of 555nm, the cross section 730 satisfies the following condition: R≤1.130%.

[0204] like Figure 6A , 6BAs shown, the maximum wave height H of the cross-section 730 is measured to be 9.5 μm. The number of the plurality of main protrusions T1 in the cross-section 730 is N = 10, the number of the plurality of micro protrusions T2 in the cross-section 730 is M = 13, the surface roughness Ra of the cross-section 730 is measured to be 1.537 μm, the distance b between two adjacent wave valleys C is between 12 μm and 42 μm, and the surface reflectivity R of the cross-section 730 is between 0.07 and 1.030%. When the low-reflectivity optical surface is at a wavelength of 555 nm, the surface reflectivity R of the cross-section 730 is 0.990%. Therefore, the specific values ​​of the aforementioned conditional expression for the cross-section 730 in the sixth embodiment are as follows:

[0205] (1) H = 9.5 μm;

[0206] (2) N = 10;

[0207] (3) M = 13;

[0208] (4) Ra=1.537μm;

[0209] (5) 0.07% ≤ R ≤ 1.030%;

[0210] (6) 12μm≤b≤42μm.

[0211] Thus, the sixth embodiment satisfies the conditional expressions for points (1) to (6) set by the aforementioned section 730; in addition, the section 730 also satisfies the following conditions: S1≤S2; D>1 / 4H; and 1 / 5H≤A≤1 / 2H; where S1 is the total area of ​​the plurality of main protrusions T1 protruding from the virtual horizontal half-height line X; S2 is the total area of ​​the plurality of main protrusions T1 below the virtual horizontal half-height line X and the plurality of micro protrusions T2; each of the troughs C is located in the phase Between two adjacent wave peaks P, one of the two adjacent wave peaks P is lower than the other wave peak P, which is a lower wave peak P2. D is the vertical distance between each wave trough C and the lower wave peak P2. Each micro protrusion T2 is located between two adjacent wave troughs C. One of the two adjacent wave troughs C is lower than the other wave trough C, which is a lower wave trough C2. A is the vertical distance between the wave peak P of each micro protrusion T2 and the lower wave trough C2.

[0212] In addition, the microstructure region 720 satisfies the following conditions: 25 ≤ N ≤ 400; 9 ≤ M ≤ 400; 0.5 μm < Sa < 3 μm; where N is the number of the plurality of main protrusions T1 in the microstructure region 720; M is the number of the plurality of micro protrusions T2 in the microstructure region 720; Sa is the surface roughness of the microstructure region 720; in the sixth embodiment, the number N of the plurality of main protrusions T1 in the microstructure region 720 is 100, the number M of the plurality of micro protrusions T2 in the microstructure region 720 is 169, and the measured surface roughness Sa of the microstructure region 720 is 1.9 μm.

[0213] Thus, the microstructured optical member 700 with the design of the microstructure region 720 can effectively disperse stray light and provide a good effect of optimizing the removal of stray light. Moreover, when the microstructured optical member 700 is applied to the optical lens module 100 of the first embodiment, the optical lens module 100 has the function of dispersing stray light, achieving the purpose of preventing stray light from entering the lens barrel 10.

[0214] Please refer to Figure 7A , which is the microstructured optical member 800 of the seventh preferred embodiment of the present invention. The microstructured optical member 800 is applied to the optical lens module 100 of the foregoing first embodiment. The microstructured optical member 800 can also be selected from one or a combination of the lens barrel 10, the plurality of lenses 21, and the equal-spacing rings 30.

[0215] The microstructured optical member 800 includes a low-reflection optical surface (not shown in the figure). The low-reflection optical surface is located on the surface of the lens barrel 10, each lens 21, or each spacer ring 30. The low-reflection optical surface has a microstructure region 820, which is an area region arbitrarily formed by 0.3 mm * 0.3 mm on the low-reflection optical surface. A cross-section 830 is defined in the microstructure region 820, and the cross-section 830 corresponds to the side length direction of the microstructure region 820. In the seventh embodiment, the cross-section 830 of the microstructure region 820 is analyzed in a plane by using a white light interferometer for measurement.

[0216] As Figure 7AAs shown, the cross section 830 has multiple peaks P and multiple troughs C. The cross section 830 defines a maximum wave height H and a virtual horizontal half-height line X. The maximum wave height H is the vertical distance between the highest peak P1 of the multiple peaks P and the lowest trough C1 of the multiple troughs C. The highest peak P1 is the highest position among the multiple peaks P, and the lowest trough C1 is the lowest position among the multiple troughs C. The virtual horizontal half-height line X is the distance between the highest peak P1 and the lowest trough C1. The vertical distance of P1 is half of the maximum wave height H distance, and the virtual horizontal half-height line X is located between the highest wave peak P1 and the lowest wave trough C1. The cross section 830 has multiple main protrusions T1 and multiple micro protrusions T2. The multiple wave peaks P are located at the multiple main protrusions T1 and the multiple micro protrusions T2, respectively. The position of the wave peak P of each main protrusion T1 is higher than the virtual horizontal half-height line X, and the position of the wave peak P of each micro protrusion T2 is lower than the virtual horizontal half-height line X.

[0217] To ensure that the microstructure region 820 has a good effect on eliminating scattered light, in the seventh embodiment, the cross section 830 meets the following condition:

[0218] (1) 0.6μm≤H≤18μm;

[0219] (2) 5≤N≤20;

[0220] (3) 3≤M≤20;

[0221] (4) 0.5μm <Ra<3μm;

[0222] (5) 0.07% ≤ R ≤ 1.150%;

[0223] (6) 5μm≤b≤100μm.

[0224] Where H is the maximum wave height; N is the number of the plurality of main protrusions T1 on the cross section 830; M is the number of the plurality of micro protrusions T2 on the cross section 830; Ra is the surface roughness of the cross section 830; R is the surface reflectivity of the cross section 830; b is the distance between two adjacent valleys C; when the low-reflectivity optical surface is at a wavelength of 555nm, the cross section 830 satisfies the following condition: R≤1.130%.

[0225] like Figure 7A , 7BAs shown, the maximum wave height H of the cross-section 830 is measured to be 10.5 μm. The number of the plurality of main protrusions T1 in the cross-section 830 is N = 9, the number of the plurality of micro protrusions T2 in the cross-section 830 is M = 13, the surface roughness Ra of the cross-section 830 is measured to be 1.887 μm, the distance b between two adjacent wave valleys C is between 12 μm and 48 μm, and the surface reflectivity R of the cross-section 830 is between 0.085% and 1.050%. When the low-reflectivity optical surface is at a wavelength of 555 nm, the surface reflectivity R of the cross-section 830 is 0.995%. Therefore, the specific values ​​of the aforementioned conditional expression for the cross-section 830 in the seventh embodiment are as follows:

[0226] (1) H = 10.5 μm;

[0227] (2) N = 9;

[0228] (3) M = 13;

[0229] (4) Ra=1.887μm;

[0230] (5) 0.085% ≤ R ≤ 1.050%;

[0231] (6) 12μm≤b≤48μm.

[0232] Thus, the seventh embodiment satisfies the conditional expressions for points (1) to (6) set by the aforementioned section 830; in addition, the section 830 also satisfies the following conditions: S1≤S2; D>1 / 4H; and 1 / 5H≤A≤1 / 2H; where S1 is the total area of ​​the plurality of main protrusions T1 protruding from the virtual horizontal half-height line X; S2 is the total area of ​​the plurality of main protrusions T1 below the virtual horizontal half-height line X and the plurality of micro protrusions T2; each of the troughs C is located in the phase Between two adjacent wave peaks P, one of the two adjacent wave peaks P is lower than the other wave peak P, which is a lower wave peak P2. D is the vertical distance between each wave trough C and the lower wave peak P2. Each micro protrusion T2 is located between two adjacent wave troughs C. One of the two adjacent wave troughs C is lower than the other wave trough C, which is a lower wave trough C2. A is the vertical distance between the wave peak P of each micro protrusion T2 and the lower wave trough C2.

[0233] In addition, the micro-structure region 820 satisfies the following conditions: 25 ≤ N ≤ 400; 9 ≤ M ≤ 400; 0.5 μm < Sa < 3 μm; where N is the number of the plurality of main protrusions T1 in the micro-structure region 820; M is the number of the plurality of micro-protrusions T2 in the micro-structure region 820; Sa is the surface roughness of the micro-structure region 820; in the seventh embodiment, the number N of the plurality of main protrusions T1 in the micro-structure region 820 is 81, the number M of the plurality of micro-protrusions T2 in the micro-structure region 820 is 169, and the measured surface roughness Sa of the micro-structure region 820 is 2.1 μm.

[0234] Therefore, the micro-structured optical member 800 with the design of the micro-structure region 820 can effectively disperse stray light and provide a good effect of optimizing the removal of stray light. Moreover, when the micro-structured optical member 800 is applied to the optical lens module 100 of the first embodiment, the optical lens module 100 has the function of dispersing stray light, achieving the purpose of preventing stray light from entering the lens barrel 10.

[0235] Please refer to Figure 8A , which is the micro-structured optical member 900 of the eighth preferred embodiment of the present invention. The micro-structured optical member 900 is applied to the optical lens module 100 of the aforementioned first embodiment. The micro-structured optical member 900 can also be selected from one or a combination of the lens barrel 10, the plurality of lenses 21, and the equal-spacing rings 30.

[0236] The micro-structured optical member 900 includes a low-reflection optical surface (not shown in the figure). The low-reflection optical surface is located on the surface of the lens barrel 10, each of the lenses 21, or each of the spacer rings 30. The low-reflection optical surface has a micro-structure region 920, which is an area region任选 composed of 0.3 mm * 0.3 mm on the low-reflection optical surface. The micro-structure region 920 defines a cross-section 930 corresponding to the side length direction of the micro-structure region 920. In the eighth embodiment, the cross-section 930 of the micro-structure region 920 is analyzed in a plane using a white light interferometer for measurement.

[0237] As Figure 8A It should be noted that there may be some inaccuracies in the original text, such as "任选" which may not be a standard Chinese expression. It is recommended to check and correct the original text for a more accurate translation.As shown, multiple wave peaks P and multiple wave troughs C are distributed on the cross section 930. The cross section 930 defines a maximum wave height H and a virtual horizontal half-height line X. The maximum wave height H is the vertical distance between the highest wave peak P1 and the lowest wave trough C1 among the multiple wave peaks P and C1, respectively. The highest wave peak P1 is the highest position among the multiple wave peaks P, and the lowest wave trough C1 is the lowest position among the multiple wave troughs C. The virtual horizontal half-height line X is the distance between the highest wave peak P1 and C1. The vertical distance of P1 is half of the maximum wave height H distance, and the virtual horizontal half-height line X is located between the highest wave peak P1 and the lowest wave trough C1. The cross section 930 has multiple main protrusions T1 and multiple micro protrusions T2. The multiple wave peaks P are located at the multiple main protrusions T1 and the multiple micro protrusions T2, respectively. The position of the wave peak P of each main protrusion T1 is higher than the virtual horizontal half-height line X, and the position of the wave peak P of each micro protrusion T2 is lower than the virtual horizontal half-height line X.

[0238] To ensure that the microstructure region 920 has a good effect on eliminating scattered light, in the eighth embodiment, the cross section 930 meets the following condition:

[0239] (1) 0.6μm≤H≤18μm;

[0240] (2) 5≤N≤20;

[0241] (3) 3≤M≤20;

[0242] (4) 0.5μm <Ra<3μm;

[0243] (5) 0.07% ≤ R ≤ 1.150%;

[0244] (6) 5μm≤b≤100μm.

[0245] Where H is the maximum wave height; N is the number of the plurality of main protrusions T1 on the cross section 930; M is the number of the plurality of micro protrusions T2 on the cross section 930; Ra is the surface roughness of the cross section 930; R is the surface reflectivity of the cross section 930; b is the distance between two adjacent valleys C; when the low-reflectivity optical surface is at a wavelength of 555nm, the cross section 930 satisfies the following condition: R≤1.130%.

[0246] like Figure 8A , 8BAs shown, the maximum wave height H of the cross-section 930 is measured to be 9 μm. The number of the plurality of main protrusions T1 in the cross-section 930 is N = 12, the number of the plurality of micro protrusions T2 in the cross-section 930 is M = 5, the surface roughness Ra of the cross-section 930 is measured to be 1.800 μm, the distance b between two adjacent wave valleys C is between 12 μm and 48 μm, and the surface reflectivity R of the cross-section 930 is between 0.080 and 1.050%. When the low-reflectivity optical surface is at a wavelength of 555 nm, the surface reflectivity R of the cross-section 930 is 0.990%. Therefore, the specific values ​​of the aforementioned conditional expression for the cross-section 930 in the eighth embodiment are as follows:

[0247] (1) H = 9 μm;

[0248] (2) N = 12;

[0249] (3) M = 5;

[0250] (4) Ra=1.800μm;

[0251] (5) 0.08% ≤ R ≤ 1.050%;

[0252] (6) 12μm≤b≤48μm.

[0253] Thus, the eighth embodiment satisfies the conditional expressions at points (1) to (6) set by the aforementioned section 930; in addition, the section 930 also satisfies the following conditions: S1≤S2; D>1 / 4H; and 1 / 5H≤A≤1 / 2H; where S1 is the total area of ​​the plurality of main protrusions T1 protruding from the virtual horizontal half-height line X; S2 is the total area of ​​the plurality of main protrusions T1 below the virtual horizontal half-height line X and the plurality of micro protrusions T2; each of the troughs C is located in the phase Between two adjacent wave peaks P, one of the two adjacent wave peaks P is lower than the other wave peak P, which is a lower wave peak P2. D is the vertical distance between each wave trough C and the lower wave peak P2. Each micro protrusion T2 is located between two adjacent wave troughs C. One of the two adjacent wave troughs C is lower than the other wave trough C, which is a lower wave trough C2. A is the vertical distance between the wave peak P of each micro protrusion T2 and the lower wave trough C2.

[0254] In addition, the microstructure region 920 satisfies the following conditions: 25 ≤ N ≤ 400; 9 ≤ M ≤ 400; 0.5 μm < Sa < 3 μm; where N is the number of the plurality of main protrusions T1 in the microstructure region 920; M is the number of the plurality of micro protrusions T2 in the microstructure region 920; Sa is the surface roughness of the microstructure region 920; in the eighth embodiment, the number N of the plurality of main protrusions T1 in the microstructure region 920 is 144, the number M of the plurality of micro protrusions T2 in the microstructure region 920 is 25, and the measured surface roughness Sa of the microstructure region 920 is 1.9 μm.

[0255] Thus, the microstructured optical member 900 having the design of the microstructure region 920 can effectively disperse stray light and provide a good effect of optimizing the removal of stray light. Moreover, when the microstructured optical member 900 is applied to the optical lens module 100 of the first embodiment, the optical lens module 100 has the function of dispersing stray light, achieving the purpose of preventing stray light from entering the lens barrel 10.

[0256] Please refer to Figure 9A , which is a microstructured optical member 1000 according to the ninth preferred embodiment of the present invention. The microstructured optical member 1000 is applied to the optical lens module 100 of the foregoing first embodiment. The microstructured optical member 1000 can also be selected from one or a combination of the group consisting of the lens barrel 10, the plurality of lenses 21, and the equal-spacing rings 30.

[0257] The microstructured optical member 1000 includes a low-reflection optical surface (not shown in the figure). The low-reflection optical surface is located on the surface of the lens barrel 10, each of the lenses 21, or each of the spacer rings 30. The low-reflection optical surface has a microstructure region 1020. The microstructure region 1020 is an area region arbitrarily formed by 0.3 mm * 0.3 mm on the low-reflection optical surface. A cross-section 1030 is defined in the microstructure region 1020. The cross-section 1030 corresponds to the side length direction of the microstructure region 1020. In the ninth embodiment, the cross-section 1030 of the microstructure region 1020 is analyzed in a plane using a white light interferometer for measurement.

[0258] As Figure 9AAs shown, the cross section 1030 has multiple wave peaks P and multiple wave troughs C. The cross section 1030 defines a maximum wave height H and a virtual horizontal half-height line X. The maximum wave height H is the vertical distance between the highest wave peak P1 and the lowest wave trough C1 among the multiple wave peaks P and C1, respectively. The highest wave peak P1 is the highest position among the multiple wave peaks P, and the lowest wave trough C1 is the lowest position among the multiple wave troughs C. The virtual horizontal half-height line X is the distance between the highest wave peak P1 and C1. The vertical distance of peak P1 is half the distance of the maximum wave height H, and the virtual horizontal half-height line X is located between the highest wave peak P1 and the lowest wave trough C1. The cross section 1030 has multiple main protrusions T1 and multiple micro protrusions T2. The multiple wave peaks P are located at the multiple main protrusions T1 and the multiple micro protrusions T2, respectively. The position of the wave peak P of each main protrusion T1 is higher than the virtual horizontal half-height line X, and the position of the wave peak P of each micro protrusion T2 is lower than the virtual horizontal half-height line X.

[0259] To ensure that the microstructure region 1020 has a good effect on eliminating scattered light, in the ninth embodiment, the cross section 1030 meets the following condition:

[0260] (1) 0.6μm≤H≤18μm;

[0261] (2) 5≤N≤20;

[0262] (3) 3≤M≤20;

[0263] (4) 0.5μm <Ra<3μm;

[0264] (5) 0.07% ≤ R ≤ 1.150%;

[0265] (6) 5μm≤b≤100μm.

[0266] Where H is the maximum wave height; N is the number of the plurality of main protrusions T1 in the cross section 1030; M is the number of the plurality of micro protrusions T2 in the cross section 1030; Ra is the surface roughness of the cross section 1030; R is the surface reflectivity of the cross section 1030; b is the distance between two adjacent valleys C; when the low-reflectivity optical surface is at a wavelength of 555nm, the cross section 1030 satisfies the following condition: R≤1.130%.

[0267] like Figure 9A , 9BAs shown, the maximum wave height H of the cross section 1030 is measured to be 15 μm. The number of the plurality of main protrusions T1 in the cross section 1030 is N = 10, the number of the plurality of micro protrusions T2 in the cross section 1030 is M = 10, the surface roughness Ra of the cross section 1030 is measured to be 2.608 μm, the distance b between two adjacent wave valleys C is between 15 μm and 42 μm, and the surface reflectivity R of the cross section 1030 is between 0.170% and 1.130%. When the low-reflectivity optical surface is at a wavelength of 555 nm, the surface reflectivity R of the cross section 1030 is 1.100%. Therefore, the specific values ​​of the aforementioned conditional expression for the cross section 1030 in the ninth embodiment are as follows:

[0268] (1) H = 15 μm;

[0269] (2) N = 10;

[0270] (3) M = 10;

[0271] (4) Ra=2.608μm;

[0272] (5) 0.170% ≤ R ≤ 1.130%;

[0273] (6) 15μm≤b≤42μm.

[0274] Thus, the ninth embodiment satisfies the conditional expressions for points (1) to (6) set in the aforementioned section 1030; in addition, the section 1030 also satisfies the following conditions: S1≤S2; D>1 / 4H; and 1 / 5H≤A≤1 / 2H; where S1 is the total area of ​​the plurality of main protrusions T1 protruding from the virtual horizontal half-height line X; S2 is the total area of ​​the plurality of main protrusions T1 below the virtual horizontal half-height line X and the plurality of micro protrusions T2; each of the troughs C is located at Between two adjacent peaks P, one of the two adjacent peaks P is lower than the other peak P, which is a lower peak P2. D is the vertical distance between each valley C and the lower peak P2. Each micro-protrusion T2 is located between two adjacent valleys C. One of the two adjacent valleys C is lower than the other valley C, which is a lower valley C2. A is the vertical distance between the peak P of each micro-protrusion T2 and the lower valley C2.

[0275] In addition, the microstructure region 1020 satisfies the following conditions: 25 ≤ N ≤ 400; 9 ≤ M ≤ 400; 0.5 μm < Sa < 3 μm; where N is the number of the plurality of main protrusions T1 in the microstructure region 1020; M is the number of the plurality of micro protrusions T2 in the microstructure region 1020; Sa is the surface roughness of the microstructure region 1020; in the ninth embodiment, the number N of the plurality of main protrusions T1 in the microstructure region 1020 is 100, the number M of the plurality of micro protrusions T2 in the microstructure region 1020 is 100, and the measured surface roughness Sa of the microstructure region 1020 is 2.1 μm.

[0276] Thus, the microstructured optical member 1000 having the design of the microstructure region 1020 can effectively disperse stray light and provide a good effect of optimizing the removal of stray light. Moreover, when the microstructured optical member 1000 is applied to the optical lens module 100 of the first embodiment, the optical lens module 100 has the function of dispersing stray light, achieving the purpose of preventing stray light from entering the lens barrel 10.

[0277] Please refer to Figure 10A , which is the microstructured optical member 1100 of the tenth preferred embodiment of the present invention. The microstructured optical member 1100 is applied to the optical lens module 100 of the foregoing first embodiment. The microstructured optical member 1100 can also be selected from one or a combination of the lens barrel 10, the plurality of lenses 21, and the equal-spacing rings 30.

[0278] The microstructured optical member 1100 includes a low-reflection optical surface (not shown in the figure). The low-reflection optical surface is located on the surface of the lens barrel 10, each of the lenses 21, or each of the spacer rings 30. The low-reflection optical surface has a microstructure region 1120, which is an area region arbitrarily formed by 0.3 mm * 0.3 mm on the low-reflection optical surface. A cross-section 1130 is defined in the microstructure region 1120, and the cross-section 1130 corresponds to the side length direction of the microstructure region 1120. In the tenth embodiment, the cross-section 1130 of the microstructure region 1120 is analyzed in a plane by using a white light interferometer for measurement.

[0279] As Figure 10AAs shown, the cross section 1130 has multiple wave peaks P and multiple wave troughs C. The cross section 1130 defines a maximum wave height H and a virtual horizontal half-height line X. The maximum wave height H is the vertical distance between the highest wave peak P1 and the lowest wave trough C1 among the multiple wave peaks P and C1, respectively. The highest wave peak P1 is the highest position among the multiple wave peaks P, and the lowest wave trough C1 is the lowest position among the multiple wave troughs C. The virtual horizontal half-height line X is the distance between the highest wave peak P1 and C1. The vertical distance of peak P1 is half the distance of the maximum wave height H, and the virtual horizontal half-height line X is located between the highest wave peak P1 and the lowest wave trough C1. The cross section 1130 has multiple main protrusions T1 and multiple micro protrusions T2. The multiple wave peaks P are located at the multiple main protrusions T1 and the multiple micro protrusions T2, respectively. The position of the wave peak P of each main protrusion T1 is higher than the virtual horizontal half-height line X, and the position of the wave peak P of each micro protrusion T2 is lower than the virtual horizontal half-height line X.

[0280] To ensure that the microstructure region 1120 has a good effect on eliminating scattered light, in the tenth embodiment, the cross section 1130 meets the following condition:

[0281] (1) 0.6μm≤H≤18μm;

[0282] (2) 5≤N≤20;

[0283] (3) 3≤M≤20;

[0284] (4) 0.5μm <Ra<3μm;

[0285] (5) 0.07% ≤ R ≤ 1.150%;

[0286] (6) 5μm≤b≤100μm.

[0287] Where H is the maximum wave height; N is the number of the plurality of main protrusions T1 on the cross section 1130; M is the number of the plurality of micro protrusions T2 on the cross section 1130; Ra is the surface roughness of the cross section 1130; R is the surface reflectivity of the cross section 1130; b is the distance between two adjacent valleys C; when the low-reflectivity optical surface is at a wavelength of 555nm, the cross section 1130 satisfies the following condition: R≤1.130%.

[0288] like Figure 10A , 10BAs shown, the maximum wave height H of the cross section 1130 is measured to be 9 μm. The number of the plurality of main protrusions T1 in the cross section 1130 is N = 7, the number of the plurality of micro protrusions T2 in the cross section 1130 is M = 17, the surface roughness Ra of the cross section 1130 is measured to be 1.900 μm, the distance b between two adjacent valleys C is between 12 μm and 30 μm, and the surface reflectivity R of the cross section 1130 is between 0.090 and 1.060%. When the low-reflectivity optical surface is at a wavelength of 555 nm, the surface reflectivity R of the cross section 1130 is 0.990%. Therefore, the specific values ​​of the aforementioned conditional expression for the cross section 1130 in the tenth embodiment are as follows:

[0289] (1) H = 9 μm;

[0290] (2) N = 7;

[0291] (3) M = 17;

[0292] (4) Ra=1.900μm;

[0293] (5) 0.090% ≤ R ≤ 1.060%;

[0294] (6) 12μm≤b≤30μm.

[0295] Thus, the tenth embodiment satisfies the conditional expressions for points (1) to (6) set in the aforementioned section 1130; in addition, the section 1130 also satisfies the following conditions: S1≤S2; D>1 / 4H; and 1 / 5H≤A≤1 / 2H; where S1 is the total area of ​​the plurality of main protrusions T1 protruding from the virtual horizontal half-height line X; S2 is the total area of ​​the plurality of main protrusions T1 below the virtual horizontal half-height line X and the plurality of micro protrusions T2; each of the troughs C is located at Between two adjacent peaks P, one of the two adjacent peaks P is lower than the other peak P, which is a lower peak P2. D is the vertical distance between each valley C and the lower peak P2. Each micro-protrusion T2 is located between two adjacent valleys C. One of the two adjacent valleys C is lower than the other valley C, which is a lower valley C2. A is the vertical distance between the peak P of each micro-protrusion T2 and the lower valley C2.

[0296] In addition, the microstructure region 1120 satisfies the following conditions: 25 ≤ N ≤ 400; 9 ≤ M ≤ 400; 0.5 μm < Sa < 3 μm; where N is the number of the plurality of main protrusions T1 in the microstructure region 1120; M is the number of the plurality of micro protrusions T2 in the microstructure region 1120; Sa is the surface roughness of the microstructure region 1120; in the tenth embodiment, the number N of the plurality of main protrusions T1 in the microstructure region 1120 is 49, the number M of the plurality of micro protrusions T2 in the microstructure region 1120 is 189, and the measured surface roughness Sa of the microstructure region 1120 is 2.1 μm.

[0297] Thus, the microstructured optical member 1100 having the design of the microstructure region 1120 can effectively disperse stray light, providing a good effect of optimizing the removal of stray light. Moreover, when the microstructured optical member 1100 is applied to the optical lens module 100 of the first embodiment, the optical lens module 100 has the function of dispersing stray light, achieving the purpose of preventing stray light from entering the lens barrel 10.

[0298] Please refer to Figure 11A , which is the microstructured optical member 1200 of the eleventh preferred embodiment of the present invention. The microstructured optical member 1200 is applied to the optical lens module 100 of the aforementioned first embodiment. The microstructured optical member 1200 can also be selected from one or a combination of the group consisting of the lens barrel 10, the plurality of lenses 21, and the equal-spacing rings 30.

[0299] The microstructured optical member 1200 includes a low-reflection optical surface (not shown in the figure). The low-reflection optical surface is located on the surface of the lens barrel 10, each of the lenses 21, or each of the spacer rings 30. The low-reflection optical surface has a microstructure region 1220, which is an area region任选由0.3mm*0.3mm构成 (should be 'optionally composed of 0.3 mm * 0.3 mm') on the low-reflection optical surface. The microstructure region 1220 defines a cross-section 1230, and the cross-section 1230 corresponds to the side length direction of the microstructure region 1220. In the eleventh embodiment, the cross-section 1230 of the microstructure region 1220 is analyzed in a plane using a white light interferometer for measurement.

[0300] As Figure 11A It should be noted that there is an unclear expression "任选由0.3mm*0.3mm构成" in the original text, and the translation is adjusted as best as possible according to the context.As shown, the cross section 1230 has multiple wave peaks P and multiple wave troughs C. The cross section 1230 defines a maximum wave height H and a virtual horizontal half-height line X. The maximum wave height H is the vertical distance between the highest wave peak P1 and the lowest wave trough C1 among the multiple wave peaks P and C1, respectively. The highest wave peak P1 is the highest position among the multiple wave peaks P, and the lowest wave trough C1 is the lowest position among the multiple wave troughs C. The virtual horizontal half-height line X is the distance between the highest wave peak P1 and C1. The vertical distance of peak P1 is half the distance of the maximum wave height H, and the virtual horizontal half-height line X is located between the highest wave peak P1 and the lowest wave trough C1. The cross section 1230 has multiple main protrusions T1 and multiple micro protrusions T2. The multiple wave peaks P are located at the multiple main protrusions T1 and the multiple micro protrusions T2, respectively. The position of the wave peak P of each main protrusion T1 is higher than the virtual horizontal half-height line X, and the position of the wave peak P of each micro protrusion T2 is lower than the virtual horizontal half-height line X.

[0301] To ensure that the microstructure region 1220 has a good effect on eliminating scattered light, in the eleventh embodiment, the cross section 1230 meets the following condition:

[0302] (1) 0.6μm≤H≤18μm;

[0303] (2) 5≤N≤20;

[0304] (3) 3≤M≤20;

[0305] (4) 0.5μm <Ra<3μm;

[0306] (5) 0.07% ≤ R ≤ 1.150%;

[0307] (6) 5μm≤b≤100μm.

[0308] Where H is the maximum wave height; N is the number of the plurality of main protrusions T1 in the cross section 1230; M is the number of the plurality of micro protrusions T2 in the cross section 1230; Ra is the surface roughness of the cross section 1230; R is the surface reflectivity of the cross section 1230; b is the distance between two adjacent wave valleys C; when the low-reflectivity optical surface is at a wavelength of 555nm, the cross section 1230 satisfies the following condition: R≤1.130%.

[0309] like Figure 11A , 11BAs shown, the maximum wave height H of the cross-section 1230 is measured to be 15.5 μm. The number of the plurality of main protrusions T1 in the cross-section 1230 is N = 12, the number of the plurality of micro protrusions T2 in the cross-section 1230 is M = 8, the surface roughness Ra of the cross-section 1230 is measured to be 2.646 μm, the distance b between two adjacent wave valleys C is between 12 μm and 36 μm, and the surface reflectivity R of the cross-section 1230 is between 0.180% and 1.140%. When the low-reflectivity optical surface is at a wavelength of 555 nm, the surface reflectivity R of the cross-section 1230 is 1.110%. Therefore, the specific values ​​of the aforementioned conditional expression for the cross-section 1230 in the eleventh embodiment are as follows:

[0310] (1) H = 15.5 μm;

[0311] (2) N = 12;

[0312] (3) M = 8;

[0313] (4) Ra=2.646μm;

[0314] (5) 0.180% ≤ R ≤ 1.140%;

[0315] (6) 12μm≤b≤36μm.

[0316] Thus, the eleventh embodiment satisfies the conditional expressions for points (1) to (6) set in the aforementioned section 1230; in addition, the section 1230 also satisfies the following conditions: S1≤S2; D>1 / 4H; and 1 / 5H≤A≤1 / 2H; where S1 is the total area of ​​the plurality of main protrusions T1 protruding from the virtual horizontal half-height line X; S2 is the total area of ​​the plurality of main protrusions T1 below the virtual horizontal half-height line X and the plurality of micro protrusions T2; each of the troughs C is located at Between two adjacent peaks P, one of the two adjacent peaks P is lower than the other peak P, which is a lower peak P2. D is the vertical distance between each valley C and the lower peak P2. Each micro-protrusion T2 is located between two adjacent valleys C. One of the two adjacent valleys C is lower than the other valley C, which is a lower valley C2. A is the vertical distance between the peak P of each micro-protrusion T2 and the lower valley C2.

[0317] In addition, the microstructure region 1220 satisfies the following conditions: 25 ≤ N ≤ 400; 9 ≤ M ≤ 400; 0.5 μm < Sa < 3 μm; where N is the number of the plurality of main protrusions T1 in the microstructure region 1220; M is the number of the plurality of micro protrusions T2 in the microstructure region 1220; Sa is the surface roughness of the microstructure region 1220; in the eleventh embodiment, the number N of the plurality of main protrusions T1 in the microstructure region 1220 is 144, the number M of the plurality of micro protrusions T2 in the microstructure region 1220 is 64, and the measured surface roughness Sa of the microstructure region 1220 is 2.2 μm.

[0318] Thus, the microstructured optical member 1200 having the design of the microstructure region 1220 can effectively disperse stray light and provide a good effect of optimizing the removal of stray light. Moreover, when the microstructured optical member 1200 is applied to the optical lens module 100 of the first embodiment, the optical lens module 100 has the function of dispersing stray light, achieving the purpose of preventing stray light from entering the lens barrel 10.

[0319] Please refer to Figure 12A , which is the microstructured optical member 1300 of the twelfth preferred embodiment of the present invention. The microstructured optical member 1300 is applied to the optical lens module 100 of the foregoing first embodiment. The microstructured optical member 1300 can also be selected from one or a combination of the lens barrel 10, the plurality of lenses 21, and the equal-spacing rings 30.

[0320] The microstructured optical member 1300 includes a low-reflection optical surface (not shown in the figure). The low-reflection optical surface is located on the surface of the lens barrel 10, each of the lenses 21, or each of the spacer rings 30. The low-reflection optical surface has a microstructure region 1320, which is an area region arbitrarily formed by 0.3 mm * 0.3 mm on the low-reflection optical surface. A cross-section 1330 is defined in the microstructure region 1320, and the cross-section 1330 corresponds to the side length direction of the microstructure region 1320. In the twelfth embodiment, the plane of the cross-section 1330 of the microstructure region 1320 is analyzed by using a white light interferometer for measurement.

[0321] As Figure 12AAs shown, the cross section 1330 has multiple wave peaks P and multiple wave troughs C. The cross section 1330 defines a maximum wave height H and a virtual horizontal half-height line X. The maximum wave height H is the vertical distance between the highest wave peak P1 and the lowest wave trough C1 among the multiple wave peaks P and C1, respectively. The highest wave peak P1 is the highest position among the multiple wave peaks P, and the lowest wave trough C1 is the lowest position among the multiple wave troughs C. The virtual horizontal half-height line X is the distance between the highest wave peak P1 and C1. The vertical distance of peak P1 is half the distance of the maximum wave height H, and the virtual horizontal half-height line X is located between the highest wave peak P1 and the lowest wave trough C1. The cross section 1330 has multiple main protrusions T1 and multiple micro protrusions T2. The multiple wave peaks P are located at the multiple main protrusions T1 and the multiple micro protrusions T2, respectively. The position of the wave peak P of each main protrusion T1 is higher than the virtual horizontal half-height line X, and the position of the wave peak P of each micro protrusion T2 is lower than the virtual horizontal half-height line X.

[0322] To ensure that the microstructure region 1320 has a good effect on eliminating scattered light, in the twelfth embodiment, the cross section 1330 meets the following condition:

[0323] (1) 0.6μm≤H≤18μm;

[0324] (2) 5≤N≤20;

[0325] (3) 3≤M≤20;

[0326] (4) 0.5μm <Ra<3μm;

[0327] (5) 0.07% ≤ R ≤ 1.150%;

[0328] (6) 5μm≤b≤100μm.

[0329] Where H is the maximum wave height; N is the number of the plurality of main protrusions T1 in the cross section 1330; M is the number of the plurality of micro protrusions T2 in the cross section 1330; Ra is the surface roughness of the cross section 1330; R is the surface reflectivity of the cross section 1330; b is the distance between two adjacent valleys C; when the low-reflectivity optical surface is at a wavelength of 555nm, the cross section 1330 satisfies the following condition: R≤1.130%.

[0330] like Figure 12A , 12BAs shown, the maximum wave height H of the cross section 1330 is measured to be 12 μm. The number of the plurality of main protrusions T1 in the cross section 1330 is N = 9, the number of the plurality of micro protrusions T2 in the cross section 1330 is M = 14, the surface roughness Ra of the cross section 1330 is measured to be 1.747 μm, the distance b between two adjacent wave valleys C is between 12 μm and 30 μm, and the surface reflectivity R of the cross section 1330 is between 0.080% and 1.030%. When the low-reflectivity optical surface is at a wavelength of 555 nm, the surface reflectivity R of the cross section 1330 is 0.990%. Therefore, the specific values ​​of the conditional expression for the aforementioned cross section 1330 in the twelfth embodiment are as follows:

[0331] (1) H = 12 μm;

[0332] (2) N = 9;

[0333] (3) M = 14;

[0334] (4) Ra=1.747μm;

[0335] (5) 0.080% ≤ R ≤ 1.030%;

[0336] (6) 12μm≤b≤30μm.

[0337] Thus, the twelfth embodiment satisfies the conditional expressions for points (1) to (6) set in the aforementioned section 1330; in addition, the section 1330 also satisfies the following conditions: S1≤S2; D>1 / 4H; and 1 / 5H≤A≤1 / 2H; where S1 is the total area of ​​the plurality of main protrusions T1 protruding from the virtual horizontal half-height line X; S2 is the total area of ​​the plurality of main protrusions T1 below the virtual horizontal half-height line X and the plurality of micro protrusions T2; each of the troughs C is located at Between two adjacent peaks P, one of the two adjacent peaks P is lower than the other peak P, which is a lower peak P2. D is the vertical distance between each valley C and the lower peak P2. Each micro-protrusion T2 is located between two adjacent valleys C. One of the two adjacent valleys C is lower than the other valley C, which is a lower valley C2. A is the vertical distance between the peak P of each micro-protrusion T2 and the lower valley C2.

[0338] In addition, the microstructure region 1320 satisfies the following conditions: 25 ≤ N ≤ 400; 9 ≤ M ≤ 400; 0.5 μm < Sa < 3 μm; where N is the number of the plurality of main protrusions T1 in the microstructure region 1320; M is the number of the plurality of micro protrusions T2 in the microstructure region 1320; Sa is the surface roughness of the microstructure region 1320; in the twelfth embodiment, the number N of the plurality of main protrusions T1 in the microstructure region 1320 is 81, the number M of the plurality of micro protrusions T2 in the microstructure region 1320 is 196, and the measured surface roughness Sa of the microstructure region 1320 is 1.9 μm.

[0339] Therefore, the design of the microstructure region 1320 of the microstructured optical member 1300 can effectively disperse stray light, providing a good effect of optimizing the removal of stray light. Moreover, when the microstructured optical member 1300 is applied to the optical lens module 100 of the first embodiment, the optical lens module 100 has the function of dispersing stray light, achieving the purpose of preventing stray light from entering the lens barrel 10.

[0340] Please refer to Figure 13A , which is the microstructured optical member 1400 of the thirteenth preferred embodiment of the present invention. The microstructured optical member 1400 is applied to the optical lens module 100 of the aforementioned first embodiment. The microstructured optical member 1400 can also be selected from one or a combination of the lens barrel 10, the plurality of lenses 21, and the equal-spacing rings 30.

[0341] The microstructured optical member 1400 includes a low-reflection optical surface (not shown in the figure). The low-reflection optical surface is located on the surface of the lens barrel 10, each of the lenses 21, or each of the spacer rings 30. The low-reflection optical surface has a microstructure region 1420, which is an area region arbitrarily formed by 0.3 mm * 0.3 mm on the low-reflection optical surface. A cross-section 1430 is defined in the microstructure region 1420, and the cross-section 1430 corresponds to the side length direction of the microstructure region 1420. In the thirteenth embodiment, the cross-section 1430 of the microstructure region 1420 is analyzed in a plane by using a white light interferometer for measurement.

[0342] As Figure 13AAs shown, the cross section 1430 has multiple wave peaks P and multiple wave troughs C. The cross section 1430 defines a maximum wave height H and a virtual horizontal half-height line X. The maximum wave height H is the vertical distance between the highest wave peak P1 and the lowest wave trough C1 among the multiple wave peaks P and C1, respectively. The highest wave peak P1 is the highest position among the multiple wave peaks P, and the lowest wave trough C1 is the lowest position among the multiple wave troughs C. The virtual horizontal half-height line X is the distance between the highest wave peak P1 and C1. The vertical distance of peak P1 is half the distance of the maximum wave height H, and the virtual horizontal half-height line X is located between the highest wave peak P1 and the lowest wave trough C1. The cross section 1430 has multiple main protrusions T1 and multiple micro protrusions T2. The multiple wave peaks P are located at the multiple main protrusions T1 and the multiple micro protrusions T2, respectively. The position of the wave peak P of each main protrusion T1 is higher than the virtual horizontal half-height line X, and the position of the wave peak P of each micro protrusion T2 is lower than the virtual horizontal half-height line X.

[0343] To ensure that the microstructure region 1420 has a good effect on eliminating scattered light, in the thirteenth embodiment, the cross section 1430 meets the following condition:

[0344] (1) 0.6μm≤H≤18μm;

[0345] (2) 5≤N≤20;

[0346] (3) 3≤M≤20;

[0347] (4) 0.5μm <Ra<3μm;

[0348] (5) 0.07% ≤ R ≤ 1.150%;

[0349] (6) 5μm≤b≤100μm.

[0350] Where H is the maximum wave height; N is the number of the plurality of main protrusions T1 in the cross section 1430; M is the number of the plurality of micro protrusions T2 in the cross section 1430; Ra is the surface roughness of the cross section 1430; R is the surface reflectivity of the cross section 1430; b is the distance between two adjacent valleys C; when the low-reflectivity optical surface is at a wavelength of 555nm, the cross section 1430 satisfies the following condition: R≤1.130%.

[0351] like Figure 13A , 13BAs shown, the maximum wave height H of the cross-section 1430 is measured to be 14 μm. The number of the plurality of main protrusions T1 in the cross-section 1430 is N = 10, the number of the plurality of micro protrusions T2 in the cross-section 1430 is M = 11, the surface roughness Ra of the cross-section 1430 is measured to be 2.594 μm, the distance b between two adjacent wave valleys C is between 6 μm and 48 μm, and the surface reflectivity R of the cross-section 1430 is between 0.160% and 1.110%. When the low-reflectivity optical surface is at a wavelength of 555 nm, the surface reflectivity R of the cross-section 1430 is 1.090%. Therefore, the specific values ​​of the aforementioned conditional expression for the cross-section 1430 in the thirteenth embodiment are as follows:

[0352] (1) H = 14 μm;

[0353] (2) N = 10;

[0354] (3) M = 11;

[0355] (4) Ra=2.594μm;

[0356] (5) 0.160% ≤ R ≤ 1.110%;

[0357] (6) 6μm≤b≤48μm.

[0358] Thus, the thirteenth embodiment satisfies the conditional expressions for points (1) to (6) set in the aforementioned section 1430; in addition, the section 1430 also satisfies the following conditions: S1≤S2; D>1 / 4H; and 1 / 5H≤A≤1 / 2H; where S1 is the total area of ​​the plurality of main protrusions T1 protruding from the virtual horizontal half-height line X; S2 is the total area of ​​the plurality of main protrusions T1 below the virtual horizontal half-height line X and the plurality of micro protrusions T2; each of the troughs C is located at Between two adjacent peaks P, one of the two adjacent peaks P is lower than the other peak P, which is a lower peak P2. D is the vertical distance between each valley C and the lower peak P2. Each micro-protrusion T2 is located between two adjacent valleys C. One of the two adjacent valleys C is lower than the other valley C, which is a lower valley C2. A is the vertical distance between the peak P of each micro-protrusion T2 and the lower valley C2.

[0359] In addition, the microstructure region 1420 satisfies the following conditions: 25 ≤ N ≤ 400; 9 ≤ M ≤ 400; 0.5 μm < Sa < 3 μm; where N is the number of the plurality of main protrusions T1 in the microstructure region 1420; M is the number of the plurality of micro protrusions T2 in the microstructure region 1420; Sa is the surface roughness of the microstructure region 1420; in the thirteenth embodiment, the number N of the plurality of main protrusions T1 in the microstructure region 1420 is 100, the number M of the plurality of micro protrusions T2 in the microstructure region 1420 is 121, and the measured surface roughness Sa of the microstructure region 1420 is 2.1 μm.

[0360] Therefore, the design of the microstructure region 1420 of the microstructured optical component 1400 can effectively disperse stray light and provide a good effect of optimizing the removal of stray light. Moreover, when the microstructured optical component 1400 is applied to the optical lens module 100 of the first embodiment, the optical lens module 100 has the function of dispersing stray light, achieving the purpose of preventing stray light from entering the lens barrel 10.

[0361] Please refer to Figure 14A , which is the microstructured optical component 1500 of the fourteenth preferred embodiment of the present invention. The microstructured optical component 1500 is applied to the optical lens module 100 of the foregoing first embodiment, and the microstructured optical component 1500 can also be selected from one or a combination of the group consisting of the lens barrel 10, the plurality of lenses 21, and the equal-spacing rings 30.

[0362] The microstructured optical component 1500 includes a low-reflection optical surface (not shown in the figure). The low-reflection optical surface is located on the surface of the lens barrel 10, each of the lenses 21, or each of the spacer rings 30. The low-reflection optical surface has a microstructure region 1520, which is an area region arbitrarily formed by 0.3 mm * 0.3 mm on the low-reflection optical surface. A cross-section 1530 is defined in the microstructure region 1520, and the cross-section 1530 corresponds to the side length direction of the microstructure region 1520. In the fourteenth embodiment, the cross-section 1530 of the microstructure region 1520 is analyzed in a plane by using a white light interferometer for measurement.

[0363] As Figure 14AAs shown, the cross section 1530 has multiple wave peaks P and multiple wave troughs C. The cross section 1530 defines a maximum wave height H and a virtual horizontal half-height line X. The maximum wave height H is the vertical distance between the highest wave peak P1 and the lowest wave trough C1 among the multiple wave peaks P and C1, respectively. The highest wave peak P1 is the highest position among the multiple wave peaks P, and the lowest wave trough C1 is the lowest position among the multiple wave troughs C. The virtual horizontal half-height line X is the distance between the highest wave peak P1 and C1. The vertical distance of peak P1 is half the distance of the maximum wave height H, and the virtual horizontal half-height line X is located between the highest wave peak P1 and the lowest wave trough C1. The cross section 1530 has multiple main protrusions T1 and multiple micro protrusions T2. The multiple wave peaks P are located at the multiple main protrusions T1 and the multiple micro protrusions T2, respectively. The position of the wave peak P of each main protrusion T1 is higher than the virtual horizontal half-height line X, and the position of the wave peak P of each micro protrusion T2 is lower than the virtual horizontal half-height line X.

[0364] To ensure that the microstructure region 1520 has a good effect on eliminating scattered light, in the fourteenth embodiment, the cross section 1530 meets the following condition:

[0365] (1) 0.6μm≤H≤18μm;

[0366] (2) 5≤N≤20;

[0367] (3) 3≤M≤20;

[0368] (4) 0.5μm <Ra<3μm;

[0369] (5) 0.07% ≤ R ≤ 1.150%;

[0370] (6) 5μm≤b≤100μm.

[0371] Where H is the maximum wave height; N is the number of the plurality of main protrusions T1 in the cross section 1530; M is the number of the plurality of micro protrusions T2 in the cross section 1530; Ra is the surface roughness of the cross section 1530; R is the surface reflectivity of the cross section 1530; b is the distance between two adjacent valleys C; when the low-reflectivity optical surface is at a wavelength of 555nm, the cross section 1530 satisfies the following condition: R≤1.130%.

[0372] like Figure 14A , 14BAs shown, the maximum wave height H of the cross-section 1530 is measured to be 11 μm. The number of the plurality of main protrusions T1 in the cross-section 1530 is N = 7, the number of the plurality of micro protrusions T2 in the cross-section 1530 is M = 18, the surface roughness Ra of the cross-section 1530 is measured to be 2.008 μm, the distance b between two adjacent valleys C is between 6 μm and 30 μm, and the surface reflectivity R of the cross-section 1530 is between 0.120% and 1.070%. When the low-reflectivity optical surface is at a wavelength of 555 nm, the surface reflectivity R of the cross-section 1530 is 1.020%. Therefore, the specific values ​​of the aforementioned conditional expression for the cross-section 1530 in the fourteenth embodiment are as follows:

[0373] (1) H = 11 μm;

[0374] (2) N = 7;

[0375] (3) M = 18;

[0376] (4) Ra=2.008μm;

[0377] (5) 0.120% ≤ R ≤ 1.070%;

[0378] (6) 6μm≤b≤30μm.

[0379] Thus, the fourteenth embodiment satisfies the conditional expressions for points (1) to (6) set in the aforementioned section 1530; in addition, the section 1530 also satisfies the following conditions: S1≤S2; D>1 / 4H; and 1 / 5H≤A≤1 / 2H; where S1 is the total area of ​​the plurality of main protrusions T1 protruding from the virtual horizontal half-height line X; S2 is the total area of ​​the plurality of main protrusions T1 below the virtual horizontal half-height line X and the plurality of micro protrusions T2; each of the troughs C is located at Between two adjacent peaks P, one of the two adjacent peaks P is lower than the other peak P, which is a lower peak P2. D is the vertical distance between each valley C and the lower peak P2. Each micro-protrusion T2 is located between two adjacent valleys C. One of the two adjacent valleys C is lower than the other valley C, which is a lower valley C2. A is the vertical distance between the peak P of each micro-protrusion T2 and the lower valley C2.

[0380] In addition, the microstructure region 1520 satisfies the following conditions: 25 ≤ N ≤ 400; 9 ≤ M ≤ 400; 0.5 μm < Sa < 3 μm; where N is the number of the plurality of main protrusions T1 in the microstructure region 1520; M is the number of the plurality of micro protrusions T2 in the microstructure region 1520; Sa is the surface roughness of the microstructure region 1520; in the fourteenth embodiment, the number N of the plurality of main protrusions T1 in the microstructure region 1520 is 49, the number M of the plurality of micro protrusions T2 in the microstructure region 1520 is 324, and the measured surface roughness Sa of the microstructure region 1520 is 2.0 μm.

[0381] Thus, the microstructured optical member 1500 having the design of the microstructure region 1520 can effectively disperse stray light, providing a good effect of optimizing the removal of stray light. Moreover, when the microstructured optical member 1500 is applied to the optical lens module 100 of the first embodiment, the optical lens module 100 has the function of dispersing stray light, achieving the purpose of preventing stray light from entering the lens barrel 10.

[0382] Please refer to Figure 15A , which is the microstructured optical member 1600 of the fifteenth preferred embodiment of the present invention. The microstructured optical member 1600 is applied to the optical lens module 100 of the aforementioned first embodiment. The microstructured optical member 160也 can be selected from one or a combination of the lens barrel 10, the plurality of lenses 21, and the equal-spacing rings 30.

[0383] The microstructured optical member 1600 includes a low-reflection optical surface (not shown in the figure), which is located on the surface of the lens barrel 10, each of the lenses 21, or each of the spacer rings 30. The low-reflection optical surface has a microstructure region 1620, which is an area region arbitrarily formed by 0.3 mm * 0.3 mm on the low-reflection optical surface. A cross-section 1630 is defined in the microstructure region 1620, and the cross-section 1630 corresponds to the side length direction of the microstructure region 1620. In the fifteenth embodiment, the cross-section 1630 of the microstructure region 1620 is analyzed in a plane using a white light interferometer for measurement.

[0384] As Figure 15AAs shown, the cross section 1630 has multiple wave peaks P and multiple wave troughs C. The cross section 1630 defines a maximum wave height H and a virtual horizontal half-height line X. The maximum wave height H is the vertical distance between the highest wave peak P1 and the lowest wave trough C1 among the multiple wave peaks P and C1, respectively. The highest wave peak P1 is the highest position among the multiple wave peaks P, and the lowest wave trough C1 is the lowest position among the multiple wave troughs C. The virtual horizontal half-height line X is the distance between the highest wave peak P1 and C1. The vertical distance of peak P1 is half the distance of the maximum wave height H, and the virtual horizontal half-height line X is located between the highest wave peak P1 and the lowest wave trough C1. The cross section 1630 has multiple main protrusions T1 and multiple micro protrusions T2. The multiple wave peaks P are located at the multiple main protrusions T1 and the multiple micro protrusions T2, respectively. The position of the wave peak P of each main protrusion T1 is higher than the virtual horizontal half-height line X, and the position of the wave peak P of each micro protrusion T2 is lower than the virtual horizontal half-height line X.

[0385] To ensure that the microstructure region 1620 has a good effect on eliminating scattered light, in the fifteenth embodiment, the cross section 1630 meets the following condition:

[0386] (1) 0.6μm≤H≤18μm;

[0387] (2) 5≤N≤20;

[0388] (3) 3≤M≤20;

[0389] (4) 0.5μm <Ra<3μm;

[0390] (5) 0.07% ≤ R ≤ 1.150%;

[0391] (6) 5μm≤b≤100μm.

[0392] Where H is the maximum wave height; N is the number of the plurality of main protrusions T1 in the cross section 1630; M is the number of the plurality of micro protrusions T2 in the cross section 1630; Ra is the surface roughness of the cross section 1630; R is the surface reflectivity of the cross section 1630; b is the distance between two adjacent valleys C; when the low-reflectivity optical surface is at a wavelength of 555nm, the cross section 1630 satisfies the following condition: R≤1.130%.

[0393] like Figure 15A , 15BAs shown, the maximum wave height H of the cross section 1630 is measured to be 14 μm. The number of the plurality of main protrusions T1 in the cross section 1630 is N = 14, the number of the plurality of micro protrusions T2 in the cross section 1630 is M = 10, the surface roughness Ra of the cross section 1630 is measured to be 2.372 μm, the distance b between two adjacent valleys C is between 6 μm and 54 μm, and the surface reflectivity R of the cross section 1630 is between 0.160% and 1.100%. When the low-reflectivity optical surface is at a wavelength of 555 nm, the surface reflectivity R of the cross section 1630 is 1.080%. Therefore, the specific values ​​of the aforementioned conditional expression for the cross section 1630 in the fifteenth embodiment are as follows:

[0394] (1) H = 14 μm;

[0395] (2) N = 14;

[0396] (3) M = 10;

[0397] (4) Ra=2.372μm;

[0398] (5) 0.160% ≤ R ≤ 1.100%;

[0399] (6) 6μm≤b≤54μm.

[0400] Thus, the fifteenth embodiment satisfies the conditional expressions for points (1) to (6) set in the aforementioned section 1630; in addition, the section 1630 also satisfies the following conditions: S1≤S2; D>1 / 4H; and 1 / 5H≤A≤1 / 2H; where S1 is the total area of ​​the plurality of main protrusions T1 protruding from the virtual horizontal half-height line X; S2 is the total area of ​​the plurality of main protrusions T1 below the virtual horizontal half-height line X and the plurality of micro protrusions T2; each of the troughs C is located at Between two adjacent peaks P, one of the two adjacent peaks P is lower than the other peak P, which is a lower peak P2. D is the vertical distance between each valley C and the lower peak P2. Each micro-protrusion T2 is located between two adjacent valleys C. One of the two adjacent valleys C is lower than the other valley C, which is a lower valley C2. A is the vertical distance between the peak P of each micro-protrusion T2 and the lower valley C2.

[0401] In addition, the microstructure region 1620 satisfies the following conditions: 25 ≤ N ≤ 400; 9 ≤ M ≤ 400; 0.5 μm < Sa < 3 μm; where N is the number of the plurality of main protrusions T1 in the microstructure region 1620; M is the number of the plurality of micro protrusions T2 in the microstructure region 1620; Sa is the surface roughness of the microstructure region 1620; in the fifteenth embodiment, the number N of the plurality of main protrusions T1 in the microstructure region 1620 is 196, the number M of the plurality of micro protrusions T2 in the microstructure region 1620 is 100, and the measured surface roughness Sa of the microstructure region 1620 is 2.0 μm.

[0402] Thus, the microstructured optical member 1600 having the design of the microstructure region 1620 can effectively disperse stray light and provide a good effect of optimizing the removal of stray light. Moreover, the microstructured optical member 1600 is applied to the optical lens module 100 of the first embodiment, enabling the optical lens module 100 to have the function of dispersing stray light, thereby achieving the purpose of preventing stray light from entering the lens barrel 10.

[0403] Please refer to Figure 16A , which is a microstructured optical member 1700 of the sixteenth preferred embodiment of the present invention. The microstructured optical member 1700 is applied to the optical lens module 100 of the aforementioned first embodiment, and the microstructured optical member 1700 can also be selected from one or a combination of the group consisting of the lens barrel 10, the plurality of lenses 21, and the equal-spacing rings 30.

[0404] The microstructured optical member 1700 includes a low-reflection optical surface (not shown in the figure), which is located on the surface of the lens barrel 10, each of the lenses 21, or each of the spacer rings 30. The low-reflection optical surface has a microstructure region 1720, which is an area region arbitrarily formed by 0.3 mm * 0.3 mm on the low-reflection optical surface. A cross-section 1730 is defined in the microstructure region 1720, and the cross-section 1730 corresponds to the side length direction of the microstructure region 1720. In the sixteenth embodiment, the cross-section 1730 of the microstructure region 1720 is analyzed in a plane using a white light interferometer for measurement.

[0405] As Figure 16AAs shown, the cross section 1730 has multiple wave peaks P and multiple wave troughs C. The cross section 1730 defines a maximum wave height H and a virtual horizontal half-height line X. The maximum wave height H is the vertical distance between the highest wave peak P1 and the lowest wave trough C1 among the multiple wave peaks P and C1, respectively. The highest wave peak P1 is the highest position among the multiple wave peaks P, and the lowest wave trough C1 is the lowest position among the multiple wave troughs C. The virtual horizontal half-height line X is the distance between the highest wave peak P1 and C1. The vertical distance of peak P1 is half the distance of the maximum wave height H, and the virtual horizontal half-height line X is located between the highest wave peak P1 and the lowest wave trough C1. The cross section 1730 has multiple main protrusions T1 and multiple micro protrusions T2. The multiple wave peaks P are located at the multiple main protrusions T1 and the multiple micro protrusions T2, respectively. The position of the wave peak P of each main protrusion T1 is higher than the virtual horizontal half-height line X, and the position of the wave peak P of each micro protrusion T2 is lower than the virtual horizontal half-height line X.

[0406] To ensure that the microstructure region 1720 has a good effect on eliminating scattered light, in the sixteenth embodiment, the cross section 1730 meets the following condition:

[0407] (1) 0.6μm≤H≤18μm;

[0408] (2) 5≤N≤20;

[0409] (3) 3≤M≤20;

[0410] (4) 0.5μm <Ra<3μm;

[0411] (5) 0.07% ≤ R ≤ 1.150%;

[0412] (6) 5μm≤b≤100μm.

[0413] Where H is the maximum wave height; N is the number of the plurality of main protrusions T1 in the cross section 1730; M is the number of the plurality of micro protrusions T2 in the cross section 1730; Ra is the surface roughness of the cross section 1730; R is the surface reflectivity of the cross section 1730; b is the distance between two adjacent valleys C; when the low-reflectivity optical surface is at a wavelength of 555nm, the cross section 1730 satisfies the following condition: R≤1.130%.

[0414] like Figure 16A , 16BAs shown, the maximum wave height H of the cross section 1730 is measured to be 13 μm. The number of the plurality of main protrusions T1 in the cross section 1730 is N = 8, the number of the plurality of micro protrusions T2 in the cross section 1730 is M = 14, the surface roughness Ra of the cross section 1730 is measured to be 2.250 μm, the distance b between two adjacent wave valleys C is between 6 μm and 42 μm, and the surface reflectivity R of the cross section 1730 is between 0.150 and 1.090%. When the low-reflectivity optical surface is at a wavelength of 555 nm, the surface reflectivity R of the cross section 1730 is 1.060%. Therefore, the specific values ​​of the conditional expression for the aforementioned cross section 1730 in the sixteenth embodiment are as follows:

[0415] (1) H = 13 μm;

[0416] (2) N = 8;

[0417] (3) M = 14;

[0418] (4) Ra = 2.250 μm;

[0419] (5) 0.150% ≤ R ≤ 1.090%;

[0420] (6) 6μm≤b≤42μm.

[0421] Thus, the sixteenth embodiment satisfies the conditional expressions for points (1) to (6) set in the aforementioned section 1730; in addition, the section 1730 also satisfies the following conditions: S1≤S2; D>1 / 4H; and 1 / 5H≤A≤1 / 2H; where S1 is the total area of ​​the plurality of main protrusions T1 protruding from the virtual horizontal half-height line X; S2 is the total area of ​​the plurality of main protrusions T1 below the virtual horizontal half-height line X and the plurality of micro protrusions T2; each of the troughs C is located at Between two adjacent peaks P, one of the two adjacent peaks P is lower than the other peak P, which is a lower peak P2. D is the vertical distance between each valley C and the lower peak P2. Each micro-protrusion T2 is located between two adjacent valleys C. One of the two adjacent valleys C is lower than the other valley C, which is a lower valley C2. A is the vertical distance between the peak P of each micro-protrusion T2 and the lower valley C2.

[0422] In addition, the micro-structure region 1720 satisfies the following conditions: 25 ≤ N ≤ 400; 9 ≤ M ≤ 400; 0.5 μm < Sa < 3 μm; where N is the number of the plurality of main protrusions T1 in the micro-structure region 1720; M is the number of the plurality of micro-protrusions T2 in the micro-structure region 1720; Sa is the surface roughness of the micro-structure region 1720; in the sixteenth embodiment, the number N of the plurality of main protrusions T1 in the micro-structure region 1720 is 64, the number M of the plurality of micro-protrusions T2 in the micro-structure region 1720 is 196, and the measured surface roughness Sa of the micro-structure region 1720 is 2.2 μm.

[0423] Thus, the micro-structured optical member 1700 having the design of the micro-structure region 1720 can effectively disperse stray light and provide a good effect of optimizing the removal of stray light. Moreover, the micro-structured optical member 1700 is applied to the optical lens module 100 of the first embodiment, enabling the optical lens module 100 to have the function of dispersing stray light, so as to achieve the purpose of preventing stray light from entering the lens barrel 10.

[0424] Please refer to Figure 17A , which is the micro-structured optical member 1800 of the seventeenth preferred embodiment of the present invention. The micro-structured optical member 1800 is applied to the optical lens module 100 of the foregoing first embodiment. The micro-structured optical member 1800 can also be selected from one or a combination of the group consisting of the lens barrel 10, the plurality of lenses 21, and the equal-spacing rings 30.

[0425] The micro-structured optical member 1800 includes a low-reflection optical surface (not shown in the figure). The low-reflection optical surface is located on the surface of the lens barrel 10, each of the lenses 21, or each of the spacer rings 30. The low-reflection optical surface has a micro-structure region 1820, which is an area region arbitrarily formed by 0.3 mm * 0.3 mm on the low-reflection optical surface. A cross-section 1830 is defined in the micro-structure region 1820, and the cross-section 1830 corresponds to the side length direction of the micro-structure region 1820. In the seventeenth embodiment, the cross-section 1830 of the micro-structure region 1820 is analyzed in a plane by using a white light interferometer for measurement.

[0426] As Figure 17AAs shown, the cross section 1830 has multiple wave peaks P and multiple wave troughs C. The cross section 1830 defines a maximum wave height H and a virtual horizontal half-height line X. The maximum wave height H is the vertical distance between the highest wave peak P1 and the lowest wave trough C1 among the multiple wave peaks P and C1, respectively. The highest wave peak P1 is the highest position among the multiple wave peaks P, and the lowest wave trough C1 is the lowest position among the multiple wave troughs C. The virtual horizontal half-height line X is the vertical distance between the highest wave peak P1 and C1. The vertical distance of peak P1 is half the distance of the maximum wave height H, and the virtual horizontal half-height line X is located between the highest wave peak P1 and the lowest wave trough C1. The cross section 1830 has multiple main protrusions T1 and multiple micro protrusions T2. The multiple wave peaks P are located at the multiple main protrusions T1 and the multiple micro protrusions T2, respectively. The position of the wave peak P of each main protrusion T1 is higher than the virtual horizontal half-height line X, and the position of the wave peak P of each micro protrusion T2 is lower than the virtual horizontal half-height line X.

[0427] To ensure that the microstructure region 1820 has a good effect on eliminating scattered light, in the seventeenth embodiment, the cross section 1830 meets the following condition:

[0428] (1) 0.6μm≤H≤18μm;

[0429] (2) 5≤N≤20;

[0430] (3) 3≤M≤20;

[0431] (4) 0.5μm <Ra<3μm;

[0432] (5) 0.07% ≤ R ≤ 1.150%;

[0433] (6) 5μm≤b≤100μm.

[0434] Where H is the maximum wave height; N is the number of the plurality of main protrusions T1 in the cross section 1830; M is the number of the plurality of micro protrusions T2 in the cross section 1830; Ra is the surface roughness of the cross section 1830; R is the surface reflectivity of the cross section 1830; b is the distance between two adjacent valleys C; when the low-reflectivity optical surface is at a wavelength of 555nm, the cross section 1830 satisfies the following condition: R≤1.130%.

[0435] like Figure 17A , 17BAs shown, the maximum wave height H of the cross section 1830 is measured to be 13 μm. The number of the plurality of main protrusions T1 in the cross section 1830 is N = 10, the number of the plurality of micro protrusions T2 in the cross section 1830 is M = 12, the surface roughness Ra of the cross section 1830 is measured to be 2.121 μm, the distance b between two adjacent wave valleys C is between 6 μm and 36 μm, and the surface reflectivity R of the cross section 1830 is between 0.130% and 1.090%. When the low-reflectivity optical surface is at a wavelength of 555 nm, the surface reflectivity R of the cross section 1830 is 1.040%. Therefore, the specific values ​​of the conditional expression for the aforementioned cross section 1830 in the seventeenth embodiment are as follows:

[0436] (1) H = 13 μm;

[0437] (2) N = 10;

[0438] (3) M = 12;

[0439] (4) Ra=2.121μm;

[0440] (5) 0.130% ≤ R ≤ 1.090%;

[0441] (6) 6μm≤b≤36μm.

[0442] Thus, the seventeenth embodiment satisfies the conditional expressions for points (1) to (6) set in the aforementioned section 1830; in addition, the section 1830 also satisfies the following conditions: S1≤S2; D>1 / 4H; and 1 / 5H≤A≤1 / 2H; where S1 is the total area of ​​the plurality of main protrusions T1 protruding from the virtual horizontal half-height line X; S2 is the total area of ​​the plurality of main protrusions T1 below the virtual horizontal half-height line X and the plurality of micro protrusions T2; each of the troughs C is located at Between two adjacent peaks P, one of the two adjacent peaks P is lower than the other peak P, which is a lower peak P2. D is the vertical distance between each valley C and the lower peak P2. Each micro-protrusion T2 is located between two adjacent valleys C. One of the two adjacent valleys C is lower than the other valley C, which is a lower valley C2. A is the vertical distance between the peak P of each micro-protrusion T2 and the lower valley C2.

[0443] In addition, the microstructural region 1820 satisfies the following conditions: 25 ≤ N ≤ 400; 9 ≤ M ≤ 400; 0.5 μm < Sa < 3 μm; where N is the number of the plurality of main protrusions T1 in the microstructural region 1820; M is the number of the plurality of micro protrusions T2 in the microstructural region 1820; Sa is the surface roughness of the microstructural region 1820; in the seventeenth embodiment, the number N of the plurality of main protrusions T1 in the microstructural region 1820 is 100, the number M of the plurality of micro protrusions T2 in the microstructural region 1820 is 144, and the measured surface roughness Sa of the microstructural region 1820 is 2.1 μm.

[0444] Thus, the microstructured optical member 1800 having the design of the microstructural region 1820 can effectively disperse stray light, providing a good effect of optimizing the removal of stray light. Moreover, when the microstructured optical member 1800 is applied to the optical lens module 100 of the first embodiment, the optical lens module 100 has the function of dispersing stray light, achieving the purpose of preventing stray light from entering the lens barrel 10.

[0445] Please refer to Figure 18A , which is the microstructured optical member 1900 of the eighteenth preferred embodiment of the present invention. The microstructured optical member 1900 is applied to the optical lens module 100 of the foregoing first embodiment. The microstructured optical member 1900 can also be selected from one or a combination of the lens barrel 10, the plurality of lenses 21, and the equal-spacing rings 30.

[0446] The microstructured optical member 1900 includes a low-reflection optical surface (not shown in the figure). The low-reflection optical surface is located on the surface of the lens barrel 10, each of the lenses 21, or each of the spacer rings 30. The low-reflection optical surface has a microstructural region 1920, which is an area region arbitrarily formed by 0.3 mm * 0.3 mm on the low-reflection optical surface. A cross-section 1930 is defined in the microstructural region 1920 corresponding to the side length direction of the microstructural region 1920. In the eighteenth embodiment, the cross-section 1930 of the microstructural region 1920 is analyzed in a plane by using a white light interferometer for measurement.

[0447] As Figure 18AAs shown, the cross section 1930 has multiple wave peaks P and multiple wave troughs C. The cross section 1930 defines a maximum wave height H and a virtual horizontal half-height line X. The maximum wave height H is the vertical distance between the highest wave peak P1 and the lowest wave trough C1 among the multiple wave peaks P and C1, respectively. The highest wave peak P1 is the highest position among the multiple wave peaks P, and the lowest wave trough C1 is the lowest position among the multiple wave troughs C. The virtual horizontal half-height line X is the distance between the highest wave peak P1 and C1. The vertical distance of peak P1 is half the distance of the maximum wave height H, and the virtual horizontal half-height line X is located between the highest wave peak P1 and the lowest wave trough C1. The cross section 1930 has multiple main protrusions T1 and multiple micro protrusions T2. The multiple wave peaks P are located at the multiple main protrusions T1 and the multiple micro protrusions T2, respectively. The position of the wave peak P of each main protrusion T1 is higher than the virtual horizontal half-height line X, and the position of the wave peak P of each micro protrusion T2 is lower than the virtual horizontal half-height line X.

[0448] To ensure that the microstructure region 1920 has a good effect on eliminating scattered light, in the eighteenth embodiment, the cross section 1930 meets the following condition:

[0449] (1) 0.6μm≤H≤18μm;

[0450] (2) 5≤N≤20;

[0451] (3) 3≤M≤20;

[0452] (4) 0.5μm <Ra<3μm;

[0453] (5) 0.07% ≤ R ≤ 1.150%;

[0454] (6) 5μm≤b≤100μm.

[0455] Where H is the maximum wave height; N is the number of the plurality of main protrusions T1 at the cross section 1930; M is the number of the plurality of micro protrusions T2 at the cross section 1930; Ra is the surface roughness of the cross section 1930; R is the surface reflectivity of the cross section 1930; b is the distance between two adjacent valleys C; when the low-reflectivity optical surface is at a wavelength of 555nm, the cross section 1930 satisfies the following condition: R≤1.130%.

[0456] like Figure 18A , 18BAs shown, the maximum wave height H of the cross section 1930 is measured to be 11 μm. The number of the plurality of main protrusions T1 in the cross section 1930 is N = 9, the number of the plurality of micro protrusions T2 in the cross section 1930 is M = 12, the surface roughness Ra of the cross section 1930 is measured to be 2.031 μm, the distance b between two adjacent wave valleys C is between 12 μm and 36 μm, and the surface reflectivity R of the cross section 1930 is between 0.130% and 1.080%. When the low-reflectivity optical surface is at a wavelength of 555 nm, the surface reflectivity R of the cross section 1930 is 1.030%. Therefore, the specific values ​​of the conditional expression for the aforementioned cross section 1930 in the eighteenth embodiment are as follows:

[0457] (1) H = 11 μm;

[0458] (2) N = 9;

[0459] (3) M = 12;

[0460] (4) Ra=2.031μm;

[0461] (5) 0.130% ≤ R ≤ 1.080%;

[0462] (6) 12μm≤b≤36μm.

[0463] Thus, the eighteenth embodiment satisfies the conditional expressions for points (1) to (6) set in the aforementioned section 1930; in addition, the section 1930 also satisfies the following conditions: S1≤S2; D>1 / 4H; and 1 / 5H≤A≤1 / 2H; where S1 is the total area of ​​the plurality of main protrusions T1 protruding from the virtual horizontal half-height line X; S2 is the total area of ​​the plurality of main protrusions T1 below the virtual horizontal half-height line X and the plurality of micro protrusions T2; each of the troughs C is located at Between two adjacent peaks P, one of the two adjacent peaks P is lower than the other peak P, which is a lower peak P2. D is the vertical distance between each valley C and the lower peak P2. Each micro-protrusion T2 is located between two adjacent valleys C. One of the two adjacent valleys C is lower than the other valley C, which is a lower valley C2. A is the vertical distance between the peak P of each micro-protrusion T2 and the lower valley C2.

[0464] In addition, the microstructural region 1920 satisfies the following conditions: 25 ≤ N ≤ 400; 9 ≤ M ≤ 400; 0.5 μm < Sa < 3 μm; where N is the number of the plurality of main protrusions T1 in the microstructural region 1920; M is the number of the plurality of micro protrusions T2 in the microstructural region 1920; Sa is the surface roughness of the microstructural region 1920; in the eighteenth embodiment, the number N of the plurality of main protrusions T1 in the microstructural region 1920 is 81, the number M of the plurality of micro protrusions T2 in the microstructural region 1920 is 144, and the measured surface roughness Sa of the microstructural region 1920 is 2.1 μm.

[0465] Thus, the microstructured optical member 1900 having the design of the microstructural region 1920 can effectively disperse stray light, providing a good effect of optimizing the removal of stray light. Moreover, when the microstructured optical member 1900 is applied to the optical lens module 100 of the first embodiment, the optical lens module 100 has the function of dispersing stray light, achieving the purpose of preventing stray light from entering the lens barrel 10.

[0466] Please refer to Figure 19A , which is a microstructured optical member 2000 according to the nineteenth preferred embodiment of the present invention. The microstructured optical member 2000 is applied to the optical lens module 100 of the foregoing first embodiment. The microstructured optical member 2000 can also be selected from one or a combination of the group consisting of the lens barrel 10, the plurality of lenses 21, and the equal-spacing rings 30.

[0467] The microstructured optical member 2000 includes a low-reflection optical surface (not shown in the figure). The low-reflection optical surface is located on the surface of the lens barrel 10, each of the lenses 21, or each of the spacer rings 30. The low-reflection optical surface has a microstructural region 2020, which is an area region任选由0.3mm*0.3mm构成的面积区域 on the low-reflection optical surface. The microstructural region 2020 defines a cross-section 2030, and the cross-section 2030 corresponds to the side length direction of the microstructural region 2020. In the nineteenth embodiment, the cross-section 2030 of the microstructural region 2020 is analyzed in a plane using a white light interferometer for measurement.

[0468] [[ID=1​As shown, the cross section 2030 has multiple wave peaks P and multiple wave troughs C. The cross section 2030 defines a maximum wave height H and a virtual horizontal half-height line X. The maximum wave height H is the vertical distance between the highest wave peak P1 and the lowest wave trough C1 among the multiple wave peaks P and C1, respectively. The highest wave peak P1 is the highest position among the multiple wave peaks P, and the lowest wave trough C1 is the lowest position among the multiple wave troughs C. The virtual horizontal half-height line X is the distance between the highest wave peak P1 and C1. The vertical distance of peak P1 is half the distance of the maximum wave height H, and the virtual horizontal half-height line X is located between the highest wave peak P1 and the lowest wave trough C1. The cross section 2030 has multiple main protrusions T1 and multiple micro protrusions T2. The multiple wave peaks P are located at the multiple main protrusions T1 and the multiple micro protrusions T2, respectively. The position of the wave peak P of each main protrusion T1 is higher than the virtual horizontal half-height line X, and the position of the wave peak P of each micro protrusion T2 is lower than the virtual horizontal half-height line X.

[0469] To ensure that the microstructure region 2020 has a good effect on eliminating scattered light, in the nineteenth embodiment, the cross section 2030 meets the following condition:

[0470] (1) 0.6μm≤H≤18μm;

[0471] (2) 5≤N≤20;

[0472] (3) 3≤M≤20;

[0473] (4) 0.5μm <Ra<3μm;

[0474] (5) 0.07% ≤ R ≤ 1.150%;

[0475] (6) 5μm≤b≤100μm.

[0476] Where H is the maximum wave height; N is the number of the plurality of main protrusions T1 in the cross section 2030; M is the number of the plurality of micro protrusions T2 in the cross section 2030; Ra is the surface roughness of the cross section 2030; R is the surface reflectivity of the cross section 2030; b is the distance between two adjacent valleys C; when the low-reflectivity optical surface is at a wavelength of 555nm, the cross section 2030 satisfies the following condition: R≤1.130%.

[0477] like Figure 19A , 19BAs shown, the maximum wave height H of the cross-section 2030 is measured to be 9 μm, the number of the plurality of main protrusions T1 in the cross-section 2030 is N = 9, the number of the plurality of micro protrusions T2 in the cross-section 2030 is M = 15, the surface roughness Ra of the cross-section 2030 is measured to be 1.869 μm, the distance b between two adjacent wave valleys C is between 6 μm and 36 μm, and the surface reflectivity of the cross-section 2030 is between 0.080 and 1.040%. When the low-reflectivity optical surface is at a wavelength of 555 nm, the surface reflectivity R of the cross-section 2030 is 0.995%. Therefore, the specific values ​​of the aforementioned conditional expression for the cross-section 2030 in the nineteenth embodiment are as follows:

[0478] (1) H = 9 μm;

[0479] (2) N = 9;

[0480] (3) M = 15;

[0481] (4) Ra=1.869μm;

[0482] (5) 0.080% ≤ R ≤ 1.040%;

[0483] (6) 6μm≤b≤36μm.

[0484] Thus, the nineteenth embodiment satisfies the conditional expressions for points (1) to (6) set in the aforementioned section 2030; in addition, the section 2030 also satisfies the following conditions: S1≤S2; D>1 / 4H; and 1 / 5H≤A≤1 / 2H; where S1 is the total area of ​​the plurality of main protrusions T1 protruding from the virtual horizontal half-height line X; S2 is the total area of ​​the plurality of main protrusions T1 below the virtual horizontal half-height line X and the plurality of micro protrusions T2; each of the troughs C is located at Between two adjacent peaks P, one of the two adjacent peaks P is lower than the other peak P, which is a lower peak P2. D is the vertical distance between each valley C and the lower peak P2. Each micro-protrusion T2 is located between two adjacent valleys C. One of the two adjacent valleys C is lower than the other valley C, which is a lower valley C2. A is the vertical distance between the peak P of each micro-protrusion T2 and the lower valley C2.

[0485] In addition, the micro-structure region 2020 satisfies the following conditions: 25 ≤ N ≤ 400; 9 ≤ M ≤ 400; 0.5 μm < Sa < 3 μm; where N is the number of the plurality of main protrusions T1 in the micro-structure region 2020; M is the number of the plurality of micro-protrusions T2 in the micro-structure region 2020; Sa is the surface roughness of the micro-structure region 2020; in the nineteenth embodiment, the number N of the plurality of main protrusions T1 in the micro-structure region 2020 is 81, the number M of the plurality of micro-protrusions T2 in the micro-structure region 2020 is 225, and the measured surface roughness Sa of the micro-structure region 2020 is 2.2 μm.

[0486] Thus, the micro-structured optical member 2000 having the design of the micro-structure region 2020 can effectively disperse stray light and provide a good effect of optimizing the removal of stray light. Moreover, when the micro-structured optical member 2000 is applied to the optical lens module 100 of the first embodiment, the optical lens module 100 has the function of dispersing stray light, achieving the purpose of preventing stray light from entering the lens barrel 10.

[0487] Please refer to Figure 20A , which is the micro-structured optical member 2100 of the twentieth preferred embodiment of the present invention. The micro-structured optical member 2100 is applied to the optical lens module 100 of the foregoing first embodiment. The micro-structured optical member 2100 can also be selected from one or a combination of the group consisting of the lens barrel 10, the plurality of lenses 21, and the equal-spacing rings 30.

[0488] The micro-structured optical member 2100 includes a low-reflection optical surface (not shown in the figure). The low-reflection optical surface is located on the surface of the lens barrel 10, each of the lenses 21, or each of the spacer rings 30. The low-reflection optical surface has a micro-structure region 2120. The micro-structure region 2120 is an area region optionally formed by 0.3 mm * 0.3 mm on the low-reflection optical surface. A cross-section 2130 is defined in the micro-structure region 2120. The cross-section 2130 corresponds to the side length direction of the micro-structure region 2120. In the twentieth embodiment, the cross-section 2130 of the micro-structure region 2120 is analyzed in a plane by using a white light interferometer for measurement.

[0489] As Figure 20AAs shown, the cross section 2130 has multiple wave peaks P and multiple wave troughs C. The cross section 2130 defines a maximum wave height H and a virtual horizontal half-height line X. The maximum wave height H is the vertical distance between the highest wave peak P1 and the lowest wave trough C1 among the multiple wave peaks P and C1, respectively. The highest wave peak P1 is the highest position among the multiple wave peaks P, and the lowest wave trough C1 is the lowest position among the multiple wave troughs C. The virtual horizontal half-height line X is the vertical distance between the highest wave peak P1 and C1. The vertical distance of peak P1 is half the distance of the maximum wave height H, and the virtual horizontal half-height line X is located between the highest wave peak P1 and the lowest wave trough C1. The cross section 2130 has multiple main protrusions T1 and multiple micro protrusions T2. The multiple wave peaks P are located at the multiple main protrusions T1 and the multiple micro protrusions T2, respectively. The position of the wave peak P of each main protrusion T1 is higher than the virtual horizontal half-height line X, and the position of the wave peak P of each micro protrusion T2 is lower than the virtual horizontal half-height line X.

[0490] To ensure that the microstructure region 2120 has a good effect on eliminating scattered light, in the twentieth embodiment, the cross section 2130 meets the following condition:

[0491] (1) 0.6μm≤H≤18μm;

[0492] (2) 5≤N≤20;

[0493] (3) 3≤M≤20;

[0494] (4) 0.5μm <Ra<3μm;

[0495] (5) 0.07% ≤ R ≤ 1.150%;

[0496] (6) 5μm≤b≤100μm.

[0497] Where H is the maximum wave height; N is the number of the plurality of main protrusions T1 on the cross section 2130; M is the number of the plurality of micro protrusions T2 on the cross section 2130; Ra is the surface roughness of the cross section 2130; R is the surface reflectivity of the cross section 2130; b is the distance between two adjacent valleys C; when the low-reflectivity optical surface is at a wavelength of 555nm, the cross section 2130 satisfies the following condition: R≤1.130%.

[0498] like Figure 20A , 20BAs shown, the maximum wave height H of the cross section 2130 is measured to be 9 μm. The number of the plurality of main protrusions T1 in the cross section 2130 is N = 11, the number of the plurality of micro protrusions T2 in the cross section 2130 is M = 10, the surface roughness Ra of the cross section 2130 is measured to be 1.678 μm, the distance b between two adjacent wave valleys C is between 6 μm and 42 μm, and the surface reflectivity R of the cross section 2130 is between 0.075% and 1.030%. When the low-reflectivity optical surface is at a wavelength of 555 nm, the surface reflectivity R of the cross section 2130 is 0.990%. Therefore, the specific values ​​of the conditional expression for the aforementioned cross section 2130 in the twentieth embodiment are as follows:

[0499] (1) H = 9 μm;

[0500] (2) N = 11;

[0501] (3) M = 10;

[0502] (4) Ra=1.678μm;

[0503] (5) 0.075% ≤ R ≤ 1.030%;

[0504] (6) 6μm≤b≤42μm.

[0505] Thus, the twentieth embodiment satisfies the conditional expressions for points (1) to (6) set in the aforementioned section 2130; in addition, the section 2130 also satisfies the following conditions: S1≤S2; D>1 / 4H; and 1 / 5H≤A≤1 / 2H; where S1 is the total area of ​​the plurality of main protrusions T1 protruding from the virtual horizontal half-height line X; S2 is the total area of ​​the plurality of main protrusions T1 below the virtual horizontal half-height line X and the plurality of micro protrusions T2; each of the troughs C is located at Between two adjacent peaks P, one of the two adjacent peaks P is lower than the other peak P, which is a lower peak P2. D is the vertical distance between each valley C and the lower peak P2. Each micro-protrusion T2 is located between two adjacent valleys C. One of the two adjacent valleys C is lower than the other valley C, which is a lower valley C2. A is the vertical distance between the peak P of each micro-protrusion T2 and the lower valley C2.

[0506] In addition, the microstructure region 2120 satisfies the following conditions: 25 ≤ N ≤ 400; 9 ≤ M ≤ 400; 0.5 μm < Sa < 3 μm; where N is the number of the plurality of main protrusions T1 in the microstructure region 2120; M is the number of the plurality of micro protrusions T2 in the microstructure region 2120; Sa is the surface roughness of the microstructure region 2120; in the twentieth embodiment, the number N of the plurality of main protrusions T1 in the microstructure region 2120 is 121, the number M of the plurality of micro protrusions T2 in the microstructure region 2120 is 100, and the measured surface roughness Sa of the microstructure region 2120 is 2.1 μm.

[0507] Thus, the microstructured optical member 2100 having the design of the microstructure region 2120 can effectively disperse stray light and provide a good effect of optimizing the removal of stray light. Moreover, the microstructured optical member 2100 is applied to the optical lens module 100 of the first embodiment, enabling the optical lens module 100 to have the function of dispersing stray light and achieving the purpose of preventing stray light from entering the lens barrel 10.

[0508] Although the present utility model has been disclosed as above in embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model shall be defined by the scope of the appended patent application.

Claims

1. A microstructured optical component, said microstructured optical component being selected from one or a combination thereof of a group consisting of a lens barrel, a lens, and a spacer ring, characterized in that, The microstructured optical component comprises: A low-reflection optical surface having a microstructured area, which is an area defined by an optional 0.3 mm * 0.3 mm on the low-reflection optical surface. The microstructured area defines a cross-section corresponding to the side length direction of the microstructured area. Multiple wave peaks and multiple wave valleys are distributed on the cross-section. The cross-section defines a maximum wave height and a virtual horizontal half-height line. The maximum wave height is the vertical distance between a highest wave peak of the multiple wave peaks and a lowest wave valley of the multiple wave valleys. The vertical distance between the virtual horizontal half-height line and the highest wave peak is half of the maximum wave height distance, and the virtual horizontal half-height line is located between the highest wave peak and the lowest wave valley. Wherein, there are multiple main protrusions and multiple micro-protrusions on the cross-section. The multiple wave peaks are respectively located on the multiple main protrusions and the multiple micro-protrusions. The wave peak position of each main protrusion is higher than the virtual horizontal half-height line, and the wave peak position of each micro-protrusion is lower than the virtual horizontal half-height line. The cross-section satisfies the following conditions: 0.6 μm ≤ H ≤ 18 μm; 5≤N≤20； 3 ≤ M ≤ 20; and 1 / 5H ≤ A ≤ 1 / 2H; Where, H is the maximum wave height; N is the number of the multiple main protrusions on the cross-section; M is the number of the multiple micro-protrusions on the cross-section; each micro-protrusion is located between two adjacent wave valleys. One of the two adjacent wave valleys that is relatively lower than the other is a lower wave valley. A is the vertical distance between the wave peak of each micro-protrusion and the lower wave valley.

2. The microstructured optical component as described in claim 1, wherein, The cross-section satisfies the following conditions: 0.5 μm < Ra < 3 μm; where Ra is the surface roughness of the cross-section.

3. The microstructured optical component as described in claim 1, wherein, The cross-section satisfies the following conditions: 0.07% ≤ R ≤ 1.150%; Where R is the surface reflectivity of the cross-section.

4. The microstructured optical component as described in claim 3, wherein, When the low-reflection optical surface is under the condition of a wavelength of 555 nm, the cross-section satisfies the following conditions: R ≤ 1.130%; Where R is the surface reflectivity of the cross-section.

5. The microstructured optical component as described in claim 1, wherein, The cross-section satisfies the following conditions: S1 ≤ S2, where S1 is the total area of the multiple main protrusions protruding above the virtual horizontal half-height line, and S2 is the total area of the multiple main protrusions below the virtual horizontal half-height line and the multiple micro-protrusions.

6. The microstructured optical component as claimed in claim 1, wherein, The cross-section satisfies the following conditions: D > 1 / 4H, where each wave valley is respectively located between two adjacent wave peaks. One of the two adjacent wave peaks that is relatively lower than the other is a lower wave peak. D is the vertical distance between each wave valley and the lower wave peak.

7. The microstructured optical component as described in claim 6, wherein, The cross-section satisfies the following conditions: 5 μm ≤ b ≤ 100 μm, where b is the spacing between two adjacent wave valleys.

8. The microstructured optical component as claimed in claim 1, wherein, The microstructured area satisfies the following conditions: 0.5 μm < Sa < 3 μm; where Sa is the surface roughness of the microstructured area.

9. The microstructured optical component as claimed in claim 1, wherein, The microstructure region satisfies the following conditions: 25≤N≤400; 9≤M≤400; where N is the number of the plurality of main protrusions in the microstructure region; and M is the number of the plurality of micro protrusions in the microstructure region.

10. An optical lens module, comprising: A microscope tube with an object-side opening; A lens group, wherein the lens group is disposed inside the lens barrel, and the lens group comprises a plurality of lenses extending from the object side to the image side along an optical axis from the object side opening; and An aperture is installed inside the lens barrel, and the aperture is located between the object side and the image side; A spacer ring is installed inside the lens barrel, the spacer ring is surrounding the optical axis and disposed on one side of the object side or image side of one of the lenses; wherein the lens barrel, the plurality of lenses and the spacer ring, or a combination thereof, are microstructured optical components as described in any one of claims 1 to 9.

11. The optical lens module as claimed in claim 10, wherein, When the lens barrel is the microstructured optical component, the lens barrel has a light-shielding ring that surrounds the optical axis, the object-side opening is located inside the light-shielding ring, and the low-reflection optical surface is located on the overall surface of the light-shielding ring.

12. The optical lens module as claimed in claim 10, wherein, When the lens barrel is the microstructured optical component, the low-reflection optical surface is located at the inner edge of the object-side opening.

13. The optical lens module as claimed in claim 10, wherein, When the lens barrel is the microstructured optical component, the lens barrel has a light-shielding ring that surrounds the optical axis, the object-side opening is located inside the light-shielding ring, and the low-reflection optical surface is located on the overall surface of the light-shielding ring and the inner edge of the object-side opening.

14. The optical lens module as claimed in claim 10, wherein, When the plurality of lenses are the microstructured optical components, each lens has an optically effective region and an optically ineffective region. The optically effective region corresponds to the position of the object-side aperture, the optical axis passes through the optically effective region, and the optically ineffective region surrounds the optically effective region. The low-reflection optical surface is located in the optically ineffective region of the lens.

15. The optical lens module as claimed in claim 10, wherein, When the spacer ring is the microstructured optical component, the low-reflection optical surface is located on an inner ring surface of the spacer ring, which surrounds the optical axis.

16. The optical lens module as claimed in any one of claims 10 to 15, wherein, It also includes an optical sensing element disposed inside the lens barrel and located on an imaging surface of the lens group.

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