Optical lens and electronic device

Abstract

An optical lens and an electronic device are disclosed. The optical lens includes a lens barrel and an optical lens assembly. The lens barrel has an entrance aperture for allowing light to enter the lens barrel. The lens barrel accommodates the optical lens assembly, and an optical axis passes through the optical lens assembly. The optical lens assembly includes a plurality of lenses and at least one light-shielding plate. The light-shielding plate is an opaque plate-shaped element and forms an aperture around the optical axis. The light-shielding plate includes an object-side surface and an image-side surface. The object-side surface is closer to the entrance aperture than the image-side surface. The object-side surface is provided with a first film layer. Thus, the appearance recognition of the optical lens can be improved.

Description

Technical Field

[0001] This disclosure relates to an optical lens and an electronic device, and more particularly to a miniaturized optical lens and a portable electronic device. Background Technology

[0002] In recent years, portable electronic devices have developed rapidly, such as smart electronic devices and tablet computers, which have become ubiquitous in modern life. Optical lenses mounted on these devices have also flourished. However, as technology advances, users have increasingly higher demands for the appearance and quality of electronic devices and their optical lenses. Therefore, developing an optical lens and electronic device that is both visually distinctive and produces high-quality images has become an important and urgent problem for the industry. Summary of the Invention

[0003] This disclosure provides an optical lens and an electronic device. The optical lens includes a lens barrel and an optical lens group. The lens barrel houses the optical lens group, which includes multiple lenses and at least one light shield. The object-side surface of the light shield is provided with a first film layer. The color index of the first film layer is within a specific range, so that the light shield has colors other than grayscale tones, which can improve the appearance recognition of the optical lens and give the optical lens a unique visual experience.

[0004] According to one embodiment of this disclosure, an optical lens is provided, comprising a lens barrel and an optical lens assembly. The lens barrel has an entrance aperture that allows light to enter the lens barrel. The lens barrel houses the optical lens assembly, and the optical axis passes through the optical lens assembly. The optical lens assembly includes a plurality of lenses and at least one light-shielding plate. The light-shielding plate is an opaque sheet-like element that forms a light-passing aperture around the optical axis. The light-shielding plate includes an object-side surface and an image-side surface, with the object-side surface closer to the entrance aperture than the image-side surface. The object-side surface is provided with a first film layer, which is composed of alternating layers of high and low refractive indices. The first film layer was illuminated using a D65 standard light source to obtain reflected light. The color index of the reflected light was defined using the CIE 1976 L*a*b* color space, with CI as the color index. L* represents perceived brightness, a* represents green and red, and b* represents blue and yellow. The reflected light spectrum has maximum reflectivity between wavelengths of 380nm and 780nm. The wavelength range increasing by 50nm and decreasing by 50nm from the wavelength corresponding to the maximum reflectivity is the high reflectivity range. The wavelength range remaining between 380nm and 780nm after excluding the high reflectivity range is the second reflectivity range. The average reflectivity of the high reflectivity range is R. high The average reflectance of the second reflectance interval is R², which satisfies the following condition: CI={(L*)×[(a*)} 2 +(b*) 2 ]} 1 / 2 ; 8≤CI≤41; and 1.8≤R high / R2≤6.2.

[0005] According to the optical lens of the aforementioned embodiment, the color index is CI, and the average reflectance in the high reflectance range is R. high The average reflectance of the second reflectance interval is R², which satisfies the following conditions: 11 ≤ CI ≤ 28; and 2.2 ≤ R. high / R2≤4.8.

[0006] In the optical lens according to the aforementioned embodiment, the wavelength corresponding to the maximum reflectivity is λ. RMax It can satisfy the following condition: 380nm≤λ RMax ≤580nm.

[0007] The optical lens according to the aforementioned embodiment has a maximum reflectivity of R. Max It can satisfy the following condition: 0.5% ≤ R Max ≤4%.

[0008] According to the optical lens of the aforementioned embodiment, the average reflectivity of the reflected light in the wavelength range of 380 nm to 780 nm is R. 3878 It can satisfy the following condition: 0.1% ≤ R 3878 ≤2%.

[0009] According to the optical lens of the aforementioned embodiment, the two color indices of any two points on the first film layer have a difference, the absolute value of which is |ΔCI|, which can satisfy the following condition: 0≤|ΔCI|≤4.7.

[0010] According to the optical lens of the aforementioned embodiment, the first film layer can be disposed from the light-transmitting hole toward a direction away from the optical axis, and the coverage area of ​​the first film layer is smaller than the area of ​​the object-side surface.

[0011] According to the optical lens of the aforementioned embodiment, the number of at least one light-shielding sheet can be at least two, and the object-side surface of each light-shielding sheet is provided with a first film layer.

[0012] According to the optical lens of the aforementioned embodiment, the diameters of the light-transmitting holes of at least two light-shielding plates may be different, and the diameter of the light-transmitting hole of the light-shielding plate closer to the object side is larger than the diameter of the light-transmitting hole of the other light-shielding plate.

[0013] According to the optical lens of the aforementioned embodiment, the thickness of the light-shielding plate along the optical axis is Ts, which satisfies the following condition: 7μm <Ts<50μm。

[0014] According to the optical lens of the aforementioned embodiment, the diameter of the light entrance aperture is... The diameter of the light-transmitting aperture is It can satisfy the following conditions:

[0015] According to the optical lens of the aforementioned embodiment, the diameter of the light entrance aperture is... The diameter of the light-transmitting aperture is It can satisfy the following conditions:

[0016] According to the optical lens of the aforementioned embodiment, the maximum angle of view of the optical lens is FOV, which can satisfy the following conditions: 93 degrees ≤ FOV ≤ 175 degrees.

[0017] According to the optical lens of the aforementioned embodiment, the distance from the object-side end of the lens barrel to the image-side end of the lens barrel along the optical axis is Db, and the distance from the object-side end of the lens barrel to the first film layer is Ds, which can satisfy the following condition: 0.05≤Ds / Db≤0.41.

[0018] According to the optical lens of the aforementioned embodiment, the object-side portion of the lens barrel may include a top wall forming an entrance aperture around the optical axis, and the top wall is provided with a second coating layer. Reflected light is obtained by illuminating the second coating layer with a D65 standard light source. The color index of the reflected light is defined using the CIE 1976 L*a*b* color space, where the color index is CI2, L* represents perceived brightness, a* represents green and red, and b* represents blue and yellow. The spectrum of the reflected light has maximum reflectivity between wavelengths of 380nm and 780nm. The wavelength range increasing by 50nm and decreasing by 50nm from the wavelength corresponding to the maximum reflectivity is defined as the high reflectivity range. The wavelength range remaining after excluding the high reflectivity range from 380nm to 780nm is defined as the second reflectivity range. The average reflectivity of the high reflectivity range is R2. high The average reflectance of the second reflectance interval is R22, which satisfies the following condition: CI2={(L*)×[(a*)] 2 +(b*) 2 ]} 1 / 2 ; 11≤CI2≤41; and 1.8≤R2 high / R22≤6.2.

[0019] According to the optical lens of the aforementioned embodiment, a lens is provided on the object side of the light-blocking plate, and the lens includes an optically effective area and a peripheral area. The optically effective area allows light to pass through. The peripheral area is farther from the optical axis than the optically effective area, and at least one of the peripheral object-side surface and the peripheral image-side surface of the peripheral area is provided with a third coating layer. Reflected light is obtained by illuminating the third coating layer using a D65 standard light source. The color index of the reflected light is defined using the CIE 1976 L*a*b* color space, with a color index of CI3, where L* represents perceived brightness, a* represents green and red, and b* represents blue and yellow. It satisfies the following condition: CI3={(L*)×[(a*)]×[(L*) ... 2 +(b*) 2 ]}1 / 2 ; and 11≤CI3≤75.

[0020] According to the optical lens of the aforementioned embodiment, the third film layer is illuminated using a D65 standard light source to obtain reflected light. The spectrum of the reflected light has the highest reflectivity between 380 nm and 780 nm. The wavelength range from the wavelength corresponding to the highest reflectivity plus 50 nm and minus 50 nm is the high reflectivity range. The wavelength range between 380 nm and 780 nm, excluding the high reflectivity range, is the second reflectivity range. The average reflectivity of the high reflectivity range is R3. high The average reflectance in the second reflectance range is R32, which satisfies the following condition: 2.5 ≤ R3 high / R32≤34.

[0021] According to another embodiment of this disclosure, an electronic device is provided, which includes the optical lens of the foregoing embodiment. Attached Figure Description

[0022] Figure 1A A perspective view of an optical lens according to the first embodiment of this disclosure is shown;

[0023] Figure 1B Draw Figure 1A Top view of the optical lens;

[0024] Figure 1C Draw Figure 1A Partial cross-sectional view of a medium optical lens;

[0025] Figure 1D Draw Figure 1A Top view of the first light-blocking plate of the optical lens;

[0026] Figure 1E Draw Figure 1A Top view of the second light-shielding plate of the optical lens;

[0027] Figure 1F Draw Figure 1E Cross-sectional view along section line 1F-1F;

[0028] Figure 1G Draw Figure 1A A schematic diagram of the reflectivity of the first and second light-blocking plates of the optical lens;

[0029] Figure 1H Draw Figure 1A A schematic diagram of the reflectivity of the first light-shielding plate of the optical lens;

[0030] Figure 1I Draw Figure 1A A schematic diagram of the reflectivity of the second light-shielding plate of the optical lens;

[0031] Figure 2A A perspective view of an optical lens according to the second embodiment of this disclosure is shown;

[0032] Figure 2B Draw Figure 2A Top view of the optical lens;

[0033] Figure 2C Draw Figure 2A Partial cross-sectional view of a medium optical lens;

[0034] Figure 2D Draw Figure 2A A top view of the light-shielding plate of a central optical lens;

[0035] Figure 2E Draw Figure 2D Cross-sectional view along section line 2E-2E;

[0036] Figure 2F Drawing can be applied to Figure 2A A top view of the light-shielding plate of a central optical lens;

[0037] Figure 3A A perspective view of an optical lens according to the third embodiment of this disclosure is shown;

[0038] Figure 3B Draw Figure 3A Top view of the optical lens;

[0039] Figure 3C Draw Figure 3A Partial cross-sectional view of a medium optical lens;

[0040] Figure 3D Draw Figure 3A Top view of the lens barrel of a medium optical lens;

[0041] Figure 3E Draw Figure 3A Top view of the first light-blocking plate of the optical lens;

[0042] Figure 3F Draw Figure 3A Top view of the second light-shielding plate of the optical lens;

[0043] Figure 3G Draw Figure 3A A three-dimensional view of the first lens of a central optical lens;

[0044] Figure 3H Draw Figure 3G A schematic diagram of the reflectivity of the first lens in the middle;

[0045] Figure 4A A perspective view of an electronic device according to the fourth embodiment of this disclosure; and

[0046] Figure 4B Draw Figure 4A Block diagram of an electronic device.

[0047] [Symbol Explanation]

[0048] 40: Electronic devices

[0049] 41: Outer shell

[0050] 42: Lens cover plate

[0051] 43: Interior Space

[0052] 44: Imaging signal processing element

[0053] 45: User Interface

[0054] 46: Sensing element

[0055] 47: Flash module

[0056] 48: Focusing Assist Module

[0057] 100, 200, 300, 400: Optical lenses

[0058] 110, 210, 310, 410: Lens tube

[0059] 111, 211, 311: Entrance aperture

[0060] 115,215,315: the most extreme end of things

[0061] 116, 216, 316: Most like the lateral end

[0062] 130, 230, 330, 430: Optical lens groups

[0063] 140,340: First light-blocking plate

[0064] 141, 151, 241, 251, 341, 351: Light transmission holes

[0065] 145, 155, 245, 255, 345, 355: Object-side surface

[0066] 146, 156, 246, 346, 356: Image side surface

[0067] 149,159,249,259,349,359: First film layer

[0068] 150, 350: Second light-blocking sheet

[0069] 161, 163, 263: Coating layer

[0070] 162,262: Grassroots

[0071] 171,271,371: First lens

[0072] 172, 272, 372: Second lens

[0073] 173,273,373: Third lens

[0074] 174,274,374: Fourth lens

[0075] 175, 275, 375: Fifth lens

[0076] 176,276,376: Sixth lens

[0077] 240, 250: Light-blocking sheet

[0078] 313: Side of the object

[0079] 314: Top Wall

[0080] 319: Second film layer

[0081] 383: Effective optical region

[0082] 384: Surrounding Area

[0083] 385: Peripheral object side surface

[0084] 386: Peripheral image side surface

[0085] 389: Third film layer

[0086] 460: Image sensor

[0087] 490: Optical anti-shake component

[0088] z: Optical axis

[0089] Db: The distance along the optical axis from the object-side end of the lens barrel to the image-side end of the lens barrel.

[0090] Ds, Ds1, Ds2: Distances along the optical axis from the outermost end of the lens barrel to the first coating layer.

[0091] Diameter of the entrance aperture

[0092] Diameter of the light aperture

[0093] Ts, Ts1, Ts2: Thickness of the light-shielding sheet along the optical axis Detailed Implementation

[0094] This disclosure provides an optical lens, comprising a lens barrel and an optical lens assembly. The lens barrel has an entrance aperture that allows light to enter the lens barrel, i.e., light enters the lens barrel through the entrance aperture. The lens barrel houses the optical lens assembly, and the optical axis passes through the optical lens assembly. The optical lens assembly includes a plurality of lenses and at least one light-blocking sheet. The light-blocking sheet is an opaque sheet-like element that forms a light-passing aperture around the optical axis. The light-blocking sheet includes an object-side surface and an image-side surface, with the object-side surface closer to the entrance aperture than the image-side surface, and the object-side surface having a first film layer. A reflected light is obtained by illuminating the first film layer (at a point on it) with a D65 standard light source. The color index of the reflected light is defined as CI in the CIE 1976 L*a*b* color space. The reflected light has maximum reflectivity between wavelengths of 380nm and 780nm. The wavelength ranges increasing and decreasing by 50nm from the wavelength corresponding to the maximum reflectivity are defined as the high reflectivity range. The wavelength range between 380nm and 780nm, excluding the high reflectivity range, is defined as the second reflectivity range. The average reflectivity of the high reflectivity range is R. high The average reflectance of the second reflectance interval is R², which satisfies the following condition: CI={(L*)×[(a*)} 2 +(b*) 2 ]} 1 / 2 ; 8≤CI≤41; and 1.8≤R high / R2≤6.2. This allows the color index to fall within this range, enabling the light-shielding lens to possess colors beyond grayscale tones, improving the visual recognizability of the optical lens and giving it a unique visual appeal. Within the visible light wavelength range, only certain bands have a high average reflectivity, preventing stray light from the light-shielding lens from affecting image quality. The first film layer can be composed of alternating layers of high and low refractive indices, and the reflected light color of the first film layer can be adjusted by controlling the thickness of each layer. Furthermore, the surface of the light-shielding lens has a specific distribution of high and low reflectivity (leaning towards a cool blue hue) and maintains the coordinates of a specific color space. This specific high and low reflectivity distribution coating can also be applied to the lens barrel and lens, while simultaneously maintaining the coordinates of the specific color space. Moreover, the aforementioned optical lens can satisfy the following conditions: 11≤CI≤28; and 2.2≤R high / R2≤4.8.

[0095] Furthermore, the CIE 1976 L*a*b* color space defines color using three values: L*, a*, and b*. L* represents perceived brightness (L* = 0 for black, L* = 100 for white), a* represents green and red (a* = -128 for green, a* = 127 for red), and b* represents blue and yellow (b* = -128 for blue, b* = 127 for yellow). The test object is placed on the stage of a reflectivity measuring instrument. A D65 standard light source is used to incident perpendicularly on the first film layer at a 0-degree angle of incidence. Measurements are taken at the 0-degree reflection angle with a maximum field of view (FOV) of 2 degrees to obtain the reflectivity and L*a*b* values ​​of the reflected light. Furthermore, the wavelength range that increases by 50 nm and decreases by 50 nm from the wavelength corresponding to the maximum reflectivity is the high reflectivity range. However, if the wavelength range after increasing by 50 nm and decreasing by 50 nm exceeds 380 nm or 780 nm, then the lower limit of the high reflectivity range is 380 nm or the upper limit is 780 nm.

[0096] Furthermore, the outline of the light aperture when viewed along the optical axis can be circular or any shape (e.g., the outline of the light aperture is formed by connecting multiple arcs, such as...). Figure 2F (As shown), but not limited to this. In addition, the diameter of the light aperture can gradually increase from the image-side surface to the object-side surface.

[0097] In detail, the wavelength corresponding to the maximum reflectivity is λ. RMax It can satisfy the following condition: 380nm≤λ RMax ≤580nm. By controlling the wavelength corresponding to the maximum reflectivity, we can avoid the bands that are more prone to generating stray light, thereby improving image quality.

[0098] Maximum reflectivity is R Max It can satisfy the following condition: 0.5% ≤ R Max ≤4%. By controlling the maximum reflectivity of the first film layer, the first film layer can be colored and stray light generation can be reduced, thereby improving image quality.

[0099] The average reflectance of reflected light in the wavelength range of 380 nm to 780 nm is R. 3878 It can satisfy the following condition: 0.1% ≤ R 3878 ≤2%. This maintains a low reflectivity in the visible light band of the overall reflected light, thus avoiding stray light reflection from affecting image quality.

[0100] The color indices of any two points on the first film layer have a difference, the absolute value of which is |ΔCI|, which satisfies the following condition: 0≤|ΔCI|≤4.7. Therefore, a smaller color index difference in the first film layer indicates a more uniform color distribution and better appearance quality.

[0101] The first film layer can be arranged away from the optical axis from the light passing hole, and the coverage area of the first film layer is smaller than the area of the object side surface. In this way, the first film layer does not completely cover the object side surface of the light shielding sheet, which is beneficial to mass production.

[0102] The number of the at least one light shielding sheet can be at least two, and the first film layer is provided on the object side surface of each light shielding sheet. The diameters of the light passing holes of the at least two light shielding sheets can be different, and the diameter of the light passing hole of the light shielding sheet closer to the object side is larger than the diameter of the light passing hole of the other light shielding sheet. In this way, the two light shielding sheets can be observed simultaneously from the outside of the lens barrel. The colors of the first film layers of the two light shielding sheets can be the same, so that the appearance of the optical lens has consistency, or the colors of the first film layers of the two light shielding sheets can have slight differences, so that the visual appearance of the optical lens has a gradient color effect, and it is not limited thereto.

[0103] The thickness of the light shielding sheet along the optical axis direction is Ts, which can meet the following conditions: 7μm < Ts < 50μm. Specifically, the light shielding sheet can include a base layer and two coating layers. The object side surface of the base layer is in physical contact with one coating layer, the object side surface of the one coating layer is in physical contact with the first film layer, and the image side surface of the base layer is in physical contact with the other coating layer. The light shielding sheet can also include a base layer and one coating layer. The object side surface of the base layer is in physical contact with the first film layer, and the image side surface of the base layer is in physical contact with the coating layer. The material of the base layer can be plastic, such as PI or PET, and the material of the base layer can also be metal, such as free-cut brass or copper alloy, and it is not limited thereto.

[0104] The diameter of the light incident hole is The diameter of the light passing hole is It can meet the following conditions: Furthermore, it can meet the following conditions: In this way, when this condition is met, the proportion of the light shielding sheet that can be observed by the naked eye from the outside of the lens barrel is relatively high, which can improve the appearance consistency of the optical lens.

[0105] The maximum viewing angle of the optical lens is FOV, which can meet the following conditions: 93 degrees ≤ FOV ≤ 175 degrees. In this way, for the optical lens that meets this condition, the improvement effect of the light shielding sheet on the appearance of the optical lens is relatively significant.

[0106] Along the optical axis direction, the distance from the most object side end of the lens barrel to the most image side end of the lens barrel is Db, and the distance from the most object side end of the lens barrel to the first film layer is Ds, which can meet the following conditions: 0.05 ≤ Ds / Db ≤ 0.41. In this way, this light shielding sheet is arranged close to the light incident hole of the lens barrel, and it is easier to observe the light shielding sheet from the outside of the lens barrel.

[0107] The object side of the lens barrel may include a top wall that forms an entrance aperture around the optical axis, and the top wall is provided with a second coating layer. A reflected light is obtained by illuminating the second coating layer with a D65 standard light source. The color index of the reflected light is defined as CI2 in the CIE 1976 L*a*b* color space. The reflected light spectrum has maximum reflectivity between wavelengths of 380nm and 780nm. The wavelength range increasing by 50nm and decreasing by 50nm from the wavelength corresponding to the maximum reflectivity is the high reflectivity range. The wavelength range remaining between 380nm and 780nm after excluding the high reflectivity range is the second reflectivity range. The average reflectivity of the high reflectivity range is R2. high The average reflectance of the second reflectance interval is R22, which satisfies the following condition: CI2={(L*)×[(a*)] 2 +(b*) 2 ]} 1 / 2 ; 11≤CI2≤41; and 1.8≤R2 high / R22≤6.2. Therefore, a second coating layer is applied to the top wall of the lens barrel to give the color a visual extension, improving the overall appearance consistency of the optical lens.

[0108] A lens may be provided on the object side of the light-blocking plate. The lens includes an optically effective area and a peripheral area. The optically effective area allows light to pass through. The peripheral area is farther from the optical axis than the optically effective area, and at least one of the peripheral object-side surface and the peripheral image-side surface of the peripheral area has a third coating layer. A reflected light is obtained by illuminating the third coating layer with a D65 standard light source. The color index of the reflected light is defined as CI3 in the CIE 1976 L*a*b* color space, which satisfies the following condition: CI3={(L*)×[(a*)] 2 +(b*) 2 ]} 1 / 2 And 11≤CI3≤75. Therefore, by providing a third coating layer in the peripheral area of ​​the lens, the appearance consistency of the optical lens can be improved. Furthermore, a third coating layer can also be provided in the optically effective area of ​​the lens. Moreover, the lens material allows the third coating layer to exhibit a brighter color, thus resulting in a higher color index.

[0109] The third film layer was illuminated using a D65 standard light source to obtain reflected light. The reflected light spectrum exhibits maximum reflectivity between 380 nm and 780 nm. The wavelength range corresponding to the maximum reflectivity, increasing by 50 nm and decreasing by 50 nm, is defined as the high reflectivity range. The wavelength range between 380 nm and 780 nm, excluding the high reflectivity range, is defined as the second reflectivity range. The average reflectivity of the high reflectivity range is R3. high The average reflectance in the second reflectance range is R32, which satisfies the following condition: 2.5 ≤ R3 high / R32≤34. This improves the uniformity of the optical lens's appearance.

[0110] Another embodiment of this disclosure provides an electronic device including the aforementioned optical lens. This optical lens can enhance the visual appeal of the electronic device and is applicable to, but not limited to, electronic devices such as smartphones (dual-lens or multi-lens), tablet computers, personal video recorders, and wearable devices. Furthermore, this light-blocking device is particularly effective for ultra-wide-angle lenses, but is not a limitation thereof.

[0111] It should be noted that the same or similar technical features in the foregoing embodiments can achieve the same or similar technical effects, so they will not be repeated.

[0112] <First Embodiment>

[0113] Figure 1A A perspective view of the optical lens 100 according to the first embodiment of this disclosure, viewed from the object side. Figure 1B Draw Figure 1A Top view of the optical lens 100 from the object side. Figure 1C Draw Figure 1A A partial cross-sectional view of the Zhongguang Optical Lens 100. Please refer to... Figures 1A to 1C The optical lens 100 includes a lens barrel 110 and an optical lens group 130. The lens barrel 110 has a light entrance aperture 111, which allows light to enter the lens barrel 110. The lens barrel 110 houses the optical lens group 130, and the optical axis z passes through the optical lens group 130 (e.g., ...). Figure 1C As shown). The optical lens group 130 extends along the optical axis z from the object side (i.e., Figure 1C From the left side of the middle to the image side (i.e., the left side of the middle) to the image side Figure 1C The optical lens group 130 (right side) includes, in sequence, a first lens 171, a second lens 172, a third lens 173, a fourth lens 174, a fifth lens 175, and a sixth lens 176, for a total of six lenses. Figure 1A and Figure 1B The designations of the first lens, 171, and other transparent lenses are omitted. Figure 1C The partial surface shape of the lens is omitted from the illustration, and it should be understood that the total number and surface shape of the lenses in the optical lens group of the optical lens disclosed herein are not limited thereto. The optical lens group 130 has at least two light-shielding plates, and the optical lens group 130 specifically includes a first light-shielding plate 140, a second light-shielding plate 150, other light-shielding plates, spacer rings, and fixing rings, etc., wherein the first light-shielding plate 140 is disposed and connected between the first lens 171 and the second lens 172, and the second light-shielding plate 150 is disposed and connected between the second lens 172 and the third lens 173.

[0114] Figure 1D Draw Figure 1A Top view of the first light-shielding plate 140 of the optical lens 100. Figure 1E Draw Figure 1A A top view of the second light-shielding plate 150 of the optical lens 100. Please refer to... Figures 1C to 1E The first light-shielding sheet 140 is an opaque sheet element and forms a light-transmitting hole 141 around the optical axis z. The first light-shielding sheet 140 includes an object-side surface 145 and an image-side surface 146. The object-side surface 145 is closer to the light-receiving hole 111 than the image-side surface 146, and the object-side surface 145 is provided with a first film layer 149. The second light-shielding sheet 150 is an opaque sheet element and forms a light-transmitting hole 151 around the optical axis z. The second light-shielding sheet 150 includes an object-side surface 155 and an image-side surface 156. The object-side surface 155 is closer to the light-receiving hole 111 than the image-side surface 156, and the object-side surface 155 is provided with a first film layer 159. Furthermore, it should be understood that the dotted portions in the accompanying drawings related to this disclosure are only used to clearly indicate the area covered by the film layer, and are not used to indicate the actual color or color depth of the film layer.

[0115] The first film layer 149 is disposed from the light-transmitting aperture 141 in a direction away from the optical axis z, and the coverage area of ​​the first film layer 149 is smaller than the area of ​​the object-side surface 145. The first film layer 159 is disposed from the light-transmitting aperture 151 in a direction away from the optical axis z, and the coverage area of ​​the first film layer 159 is smaller than the area of ​​the object-side surface 155.

[0116] The light-transmitting holes 141 and 151 of the first light-blocking plate 140 and the second light-blocking plate 150 are not the same in diameter, and the diameter of the light-transmitting hole 141 of the first light-blocking plate 140, which is closer to the object, is larger than the diameter of the light-transmitting hole 151 of the second light-blocking plate 150.

[0117] Figure 1F Draw Figure 1E The cross-sectional view along section line 1F-1F (for illustration only and not drawn to scale) is shown below. Figure 1F The second light-shielding sheet 150 specifically includes a base layer 162 and covering layers 161 and 163. The object-side surface of the base layer 162 is in solid contact with the covering layer 161, and the image-side surface of the base layer 162 is in solid contact with the covering layer 163. A first film layer 159 is provided on the object-side surface of the covering layer 161. Furthermore, the structure of the first light-shielding sheet 140 can be the same as the structure described in this section for the second light-shielding sheet 150.

[0118] Figure 1G Draw Figure 1A A schematic diagram of the reflectivity of the first light-shielding plate 140 and the second light-shielding plate 150 of the optical lens 100. Figure 1H Draw Figure 1A A schematic diagram of the reflectivity of the first light-shielding plate 140 of the optical lens 100. Figure 1I Draw Figure 1AA schematic diagram of the reflectivity of the second light-shielding plate 150 of the optical lens 100, wherein the object-side surface 145 of the first light-shielding plate 140 is provided with a first film layer 149, and the object-side surface 155 of the second light-shielding plate 150 is also provided with a first film layer 159. Please refer to... Figures 1G to 1I Please refer to Tables 1.1 to 1.4 below. Tables 1.1 to 1.4 list the parameter data of the first film layers 149 and 159 of the optical lens 100 and its first light-shielding plate 140 and second light-shielding plate 150 respectively in the first embodiment of this disclosure. The light-shielding plate without film layer means that the first light-shielding plate 140 has no (or has not yet had) the first film layer 149 or the second light-shielding plate 150 has no first film layer 159. The first light-shielding plate 140 has different No. 1 or No. 2 first film layers 149, and the second light-shielding plate 150 has different No. 1 or No. 2 first film layers 159. 0 degrees means that a measurement point is measured on the first film layer 149 of the first light-shielding plate 140 or the first film layer 159 of the second light-shielding plate 150. 180 degrees means that another measurement point is measured after rotating the measurement point of 0 degrees 180 degrees relative to the optical axis z (the central axis of the first light-shielding plate 140 or the second light-shielding plate 150). Furthermore, it should be understood that the parameter data of the first film layers 149 and 159 of the first light-shielding plate 140 and the second light-shielding plate 150 listed in Tables 1.1 to 1.3 are also applicable to the optical lens 300 of the third embodiment, and any of the first film layers 149 and 159 of the first light-shielding plate 140 and the second light-shielding plate 150 listed in Tables 1.1 to 1.3 are also applicable to the first film layer, the second film layer and the third film layer in the optical lenses of the various embodiments of this disclosure.

[0119] In detail, please refer to Table 1.1 below. Table 1.1 lists the reflectance data of the first film layers 149 and 159 of the first light-shielding plate 140 and the second light-shielding plate 150 of the optical lens 100 in the first embodiment of this disclosure, respectively, in %. The unit is %. The maximum reflectance of each first film layer in Table 1.1 is indicated by the symbol # after the reflectance data, and the maximum reflectance of all first film layers corresponds to wavelengths between 437 nm and 446 nm. The relationship between wavelength and reflectance shown in Table 1.1 is as follows. Figures 1G to 1I As shown.

[0120] Please refer to Tables 1.2 and 1.3 below. Illuminate the first film layers 149 and 159 with a D65 standard light source to obtain reflected light. Define the color index (CI) of the reflected light using the CIE 1976 L*a*b* color space. The reflected light spectrum has maximum reflectivity between wavelengths of 380nm and 780nm. The wavelength range increasing by 50nm and decreasing by 50nm from the wavelength corresponding to the maximum reflectivity is the high reflectivity range. The wavelength range remaining between 380nm and 780nm after excluding the high reflectivity range is the second reflectivity range. The average reflectivity of the high reflectivity range is R.high The average reflectance in the second reflectance range is R², and the wavelength corresponding to the maximum reflectance is λ. RMax The maximum reflectivity is R Max The average reflectance of reflected light in the wavelength range of 380 nm to 780 nm is R. 3878 The color indices of any two points on the first film layers 149 and 159 have a difference, and the absolute value of the difference is |ΔCI|. Tables 1.2 and 1.3 below list the data of the optical lens 100 of the first embodiment based on the aforementioned parameters.

[0121] Please refer to Table 1.4 below. The maximum angle of view of the optical lens 100 is FOV. Along the optical axis z, the distance from the object-side end 115 of the lens barrel 110 to the image-side end 116 of the lens barrel 110 is Db; the distance from the object-side end 115 of the lens barrel 110 to the first coating layer 149 is Ds1; and the distance from the object-side end 115 of the lens barrel 110 to the first coating layer 159 is Ds2. The diameter of the entrance aperture 111 is... The diameter of the light-transmitting aperture 141 is The diameter of the light-transmitting aperture 151 is The thickness of the first light-shielding plate 140 along the optical axis z direction is Ts1, and the thickness of the second light-shielding plate 150 along the optical axis z direction is Ts2. Table 1.4 below lists the data of the optical lens 100 of the first embodiment according to the aforementioned parameters.

[0122] Table 1.1

[0123]

[0124]

[0125]

[0126]

[0127]

[0128]

[0129]

[0130]

[0131]

[0132]

[0133] Table 1.2

[0134]

[0135]

[0136] Table 1.3

[0137]

[0138] Table 1.4

[0139]

[0140] <Second Embodiment>

[0141] Figure 2A A perspective view of the optical lens 200 according to the second embodiment of this disclosure, viewed from the object side. Figure 2B Draw Figure 2A Top view of the optical lens 200 from the object side. Figure 2C Draw Figure 2A A partial cross-sectional view of the Zhongguang Optical Lens 200. Please refer to... Figures 2A to 2C The optical lens 200 includes a lens barrel 210 and an optical lens group 230. The lens barrel 210 has an entrance aperture 211 that allows light to enter. The lens barrel 210 houses the optical lens group 230, and the optical axis z passes through the optical lens group 230 (e.g., ...). Figure 2C As shown). Optical lens group 230 extends along the optical axis z from the object side (i.e., Figure 2C From the left side of the middle to the image side (i.e., the left side of the middle) to the image side Figure 2C The optical lens group 230 (right side) contains, in sequence, a first lens 271, a second lens 272, a third lens 273, a fourth lens 274, a fifth lens 275, and a sixth lens 276, for a total of six lenses. Figure 2A and Figure 2B The designations of transparent lenses such as the first lens 271 are omitted. Figure 2C The surface shape of the lens is omitted from the drawing. The optical lens group 230 has at least one light-shielding plate. Specifically, the optical lens group 230 also includes annular optical elements such as light-shielding plate 240, other light-shielding plates, spacer rings, and fixing rings. The light-shielding plate 240 is disposed and connected between the first lens 271 and the second lens 272.

[0142] Figure 2D Draw Figure 2A Please refer to the top view of the light-shielding plate 240 of the optical lens 200. Figure 2C and Figure 2DThe light-shielding sheet 240 is an opaque sheet element and forms a light-transmitting hole 241 around the optical axis z. The light-transmitting hole 241 is circular. The light-shielding sheet 240 includes an object-side surface 245 and an image-side surface 246. The object-side surface 245 is closer to the light-receiving hole 211 than the image-side surface 246, and a first film layer 249 is provided on the object-side surface 245. The first film layer 249 is disposed from the light-transmitting hole 241 in a direction away from the optical axis z, and the coverage area of ​​the first film layer 249 is smaller than the area of ​​the object-side surface 245.

[0143] Figure 2E Draw Figure 2D The cross-sectional view along section line 2E-2E (for illustration only and not drawn to scale) is shown below. Figure 2E The light-shielding sheet 240 specifically includes a base layer 262 and a covering layer 263. The object-side surface of the base layer 262 is provided with a first film layer 249 and is in solid contact with it, while the image-side surface of the base layer 262 is in solid contact with the covering layer 263.

[0144] Figure 2F Drawing can be applied to Figure 2A For a top view of the light-shielding plate 250 of the optical lens 200 (e.g., the object-side surface 255 is being observed), please refer to... Figure 2F In the optical lens group 230, the light-shielding plate 240 can be replaced by a light-shielding plate 250, which can be disposed and connected between the first lens 271 and the second lens 272. The light-shielding plate 250 is an opaque sheet-like element and forms a light-transmitting hole 251 around the optical axis z. The light-transmitting hole 251 is circular, and the annular wall forming the light-transmitting hole 251 includes multiple arc-shaped protrusions, each arc-shaped protrusion protruding towards the optical axis z. The arc-shaped protrusions are connected in sequence, and the shape of the light-transmitting hole of the light-shielding plate of the optical lens disclosed herein can be any shape and is not limited thereto.

[0145] Please refer to Table 2 below. The maximum angle of view of the optical lens 200 is FOV. Along the optical axis z, the distance from the object-side end 215 of the lens barrel 210 to the image-side end 216 of the lens barrel 210 is Db, and the distance from the object-side end 215 of the lens barrel 210 to the first coating layer 249 is Ds. The diameter of the entrance aperture 211 is... The diameter of the light-transmitting aperture 241 is The thickness of the light-shielding plate 240 along the optical axis z direction is Ts. Table 2 below lists the data of the optical lens 200 of the second embodiment based on the parameters defined above. In addition, the characteristics and parameter data of the light-shielding plate 240 can be referred to the first light-shielding plate 140 and the second light-shielding plate 150 of the optical lens 100 of the first embodiment, but are not limited thereto.

[0146] Table 2

[0147]

[0148]

[0149] <Third Embodiment>

[0150] Figure 3A A perspective view of the optical lens 300 according to the third embodiment of this disclosure, viewed from the object side. Figure 3B Draw Figure 3A Top view of the optical lens 300 from the object side. Figure 3C Draw Figure 3A A partial cross-sectional view of the Zhongguang Optical Lens 300. Please refer to... Figures 3A to 3C The optical lens 300 includes a lens barrel 310 and an optical lens group 330. The lens barrel 310 has an entrance aperture 311 that allows light to enter. The lens barrel 310 houses the optical lens group 330, and the optical axis z passes through the optical lens group 330 (e.g., ...). Figure 3C As shown). The optical lens group 330 extends along the optical axis z from the object side (i.e., Figure 3C From the left side of the middle to the image side (i.e., the left side of the middle) to the image side Figure 3C The optical lens group 330 (right side) contains, in sequence, a first lens 371, a second lens 372, a third lens 373, a fourth lens 374, a fifth lens 375, and a sixth lens 376, for a total of six lenses. Figure 3A and Figure 3B The designations of the first lens, 371, and other transparent lenses are omitted. Figure 3C The surface shape of the lens is omitted from the drawing. The optical lens group 330 has at least two light-shielding plates. Specifically, the optical lens group 330 also includes a first light-shielding plate 340, a second light-shielding plate 350, other light-shielding plates, a spacer ring, and a fixing ring, etc., of which the first light-shielding plate 340 is disposed and connected between the first lens 371 and the second lens 372, and the second light-shielding plate 350 is disposed and connected between the second lens 372 and the third lens 373.

[0151] Figure 3D Draw Figure 3A Please refer to the top view of the lens barrel 310 of the 300 optical lens. Figures 3A to 3D The object-side portion 313 of the lens barrel 310 may include a top wall 314, which forms an entrance aperture 311 around the optical axis z, and a second film layer 319 is provided on the outer surface of the top wall 314 facing the object side.

[0152] A reflected light is obtained by illuminating the second film layer 319 using a D65 standard light source. The color index of the reflected light is defined as CI2 in the CIE 1976 L*a*b* color space. The reflected light has maximum reflectivity between wavelengths of 380nm and 780nm. The wavelength ranges increasing and decreasing by 50nm from the wavelength corresponding to the maximum reflectivity are defined as the high reflectivity range. The wavelength range remaining between 380nm and 780nm after excluding the high reflectivity range is defined as the second reflectivity range. The average reflectivity of the high reflectivity range is R2. high The average reflectance of the second reflectance interval is R22, which satisfies the following condition: CI2={(L*)×[(a*) 2 +(b*) 2 ]} 1 / 2 ; 11≤CI2≤41; and 1.8≤R2 high / R22≤6.2.

[0153] Figure 3E Draw Figure 3A Top view of the first light-shielding plate 340 of the optical lens 300. Figure 3F Draw Figure 3A A top view of the second light-shielding plate 350 of the optical lens 300. Please refer to... Figure 3C , Figure 3E and Figure 3F The first light-shielding sheet 340 is an opaque sheet element and forms a light-transmitting hole 341 around the optical axis z. The first light-shielding sheet 340 includes an object-side surface 345 and an image-side surface 346. The object-side surface 345 is closer to the light-transmitting hole 311 than the image-side surface 346, and the object-side surface 345 is provided with a first film layer 349. The second light-shielding sheet 350 is an opaque sheet element and forms a light-transmitting hole 351 around the optical axis z. The second light-shielding sheet 350 includes an object-side surface 355 and an image-side surface 356. The object-side surface 355 is closer to the light-transmitting hole 311 than the image-side surface 356, and the object-side surface 355 is provided with a first film layer 359.

[0154] The first film layer 349 is disposed from the light-transmitting aperture 341 in a direction away from the optical axis z, and the coverage area of ​​the first film layer 349 is smaller than the area of ​​the object-side surface 345. The first film layer 359 is disposed from the light-transmitting aperture 351 in a direction away from the optical axis z, and the coverage area of ​​the first film layer 359 is smaller than the area of ​​the object-side surface 355.

[0155] The light-transmitting holes 341 and 351 of the first light-blocking plate 340 and the second light-blocking plate 350 are not the same in diameter, and the diameter of the light-transmitting hole 341 of the first light-blocking plate 340, which is closer to the object side, is larger than the diameter of the light-transmitting hole 351 of the second light-blocking plate 350. Regarding the characteristics and parameter data of the first light-blocking plate 340 and the second light-blocking plate 350, reference can be made to the first light-blocking plate 140 and the second light-blocking plate 150 of the optical lens 100 of the first embodiment described above, but they are not limited thereto.

[0156] Figure 3G Draw Figure 3A Please refer to the stereoscopic view of the first lens 371 of the optical lens 300 viewed from the image side. Figure 3C and Figure 3G The first light-shielding plate 340 and the second light-shielding plate 350 are provided with a first lens 371 in the object-side direction. The first lens 371 includes an optically effective region 383 and a peripheral region 384. The optically effective region 383 allows light to pass through. The peripheral region 384 is farther away from the optical axis z than the optically effective region 383. At least one of the peripheral object-side surface 385 and the peripheral image-side surface 386 of the peripheral region 384 (specifically at least the peripheral image-side surface 386) is provided with a third film layer 389.

[0157] Figure 3H Draw Figure 3G A schematic diagram of the reflectivity of the first lens 371 is shown, wherein a third film layer 389 is provided on the peripheral image-side surface 386 of the first lens 371, and the optically effective object-side surface and optically effective image-side surface of the optically effective region 383 of the first lens 371 may each be provided with a third film layer (unless otherwise labeled). Please refer to... Figure 3H Please refer to Tables 3.1 to 3.4 below. Tables 3.1 to 3.4 list the parameter data of the third film layer 389 of the optical lens 300 and its first lens 371 in the third embodiment of this disclosure.

[0158] In detail, please refer to Table 3.1 below. Table 3.1 lists the reflectance data of the third film layer 389 on the peripheral image-side surface 386 and the third film layer on the optical effective object-side surface of the first lens 371 of the optical lens 300 in the third embodiment of this disclosure, in percentage. The data is based on the wavelength and reflectance relationship graph shown in Table 3.1. Figure 3H As shown.

[0159] Please refer to Tables 3.2 and 3.3 below. Illuminate the third film layer 389 with a D65 standard light source to obtain reflected light. Define the color index of the reflected light using the CIE 1976 L*a*b* color space, with a color index of CI3. The reflected light spectrum has maximum reflectivity between 380nm and 780nm. The wavelength range increasing by 50nm and decreasing by 50nm from the wavelength corresponding to the maximum reflectivity is the high reflectivity range. The wavelength range remaining between 380nm and 780nm after excluding the high reflectivity range is the second reflectivity range. The average reflectivity of the high reflectivity range is R3. high The average reflectance in the second reflectance range is R32, and the wavelength corresponding to the maximum reflectance is λ. RMax The maximum reflectivity is R Max The average reflectance of reflected light in the wavelength range of 380 nm to 780 nm is R. 3878 Tables 3.2 and 3.3 below list the data of the optical lens 300 of the third embodiment based on the parameters defined above.

[0160] Please refer to Table 3.4 below. The maximum angle of view of the optical lens 300 is FOV. Along the optical axis z, the distance from the object-side end 315 of the lens barrel 310 to the image-side end 316 of the lens barrel 310 is Db; the distance from the object-side end 315 of the lens barrel 310 to the first coating layer 349 is Ds1; and the distance from the object-side end 315 of the lens barrel 310 to the first coating layer 359 is Ds2. The diameter of the entrance aperture 311 is... The diameter of the light-transmitting aperture 341 is The diameter of the light-transmitting aperture 351 is The thickness of the first light-shielding plate 340 along the optical axis z direction is Ts1, and the thickness of the second light-shielding plate 350 along the optical axis z direction is Ts2. Table 3.4 below lists the data of the optical lens 300 of the third embodiment based on the aforementioned parameters.

[0161] Table 3.1

[0162]

[0163]

[0164]

[0165]

[0166]

[0167]

[0168]

[0169]

[0170]

[0171]

[0172] Table 3.2

[0173]

[0174]

[0175] Table 3.3

[0176] Measurement items L* a* b* CI3={(L*)×[(a*)^2+(b*)^2]}^1 / 2 First lens - peripheral image side surface 6.76 1.46 -23.62 61.51 First lens - optically effective object-side surface 3.27 1.10 -12.84 23.30

[0177] Table 3.4

[0178]

[0179] <Fourth Embodiment>

[0180] Figure 4A A perspective view of an electronic device 40 according to the fourth embodiment of this disclosure is shown. Figure 4B Draw Figure 4A Block diagram of electronic device 40. Please refer to... Figure 4A and Figure 4B The electronic device 40 includes an optical lens 400, which includes a lens barrel 410 and an optical lens group 430. The optical lens 400 may be the optical lens 100 of the first embodiment, the optical lens 200 of the second embodiment, the optical lens 300 of the third embodiment, or other optical lenses according to the present disclosure.

[0181] Specifically, the electronic device 40 is a smartphone and includes four optical lenses 400, the four optical lenses 400 being... Figure 4A From left to right, the lenses 400 can be, in sequence, an ultra-wide-angle lens (e.g., a maximum angle of view of 93 to 175 degrees), a wide-angle main lens (e.g., a maximum angle of view of 65 to 90 degrees), a telephoto lens (e.g., a maximum angle of view of 20 to 50 degrees), and a super telephoto lens (e.g., a maximum angle of view of 5 to 20 degrees), and the maximum angle of view of each optical lens 400 is not limited to these. The four optical lenses 400 are disposed within the internal space 43 of the electronic device 40, and light enters the four optical lenses 400 respectively through the four light entrance holes of the lens cover plate 42 on the outer casing 41 of the electronic device 40. It should be understood that... Figure 4A This is only an exploded view of the lens cover 42 and the internal space 43, and does not imply that the user can remove the lens cover 42 from the electronic device 40.

[0182] In addition, the electronic device 40 may also include, but is not limited to, a control unit, a storage unit, a temporary storage unit (RAM), a read-only storage unit (ROM), or a combination thereof.

[0183] Furthermore, the user enters the shooting mode through the user interface 45 of the electronic device 40. At this time, the optical lens group 430 gathers the imaging light onto the photosensitive element 460 and outputs the relevant electronic signal of the image to the image signal processing element (ISP) 44.

[0184] Depending on the camera specifications of the electronic device 40, each optical lens 400 may also include an optical image stabilization component 490, which may be an OIS image stabilization feedback device. Furthermore, the electronic device 40 may also include at least one auxiliary optical element (not otherwise labeled) and at least one sensing element 46. In the fourth embodiment, the auxiliary optical element is a flash module 47 and a focus assist module 48. The flash module 47 can be used to compensate for color temperature, and the focus assist module 48 may be an infrared rangefinder, a laser focus module, etc. The sensing element 46 may have the function of sensing physical momentum and kinetic energy, such as an accelerometer, gyroscope, or Hall effect element, to sense the shaking and tremors caused by the user's hand or the external environment. This facilitates the autofocus function and optical image stabilization component 490 configured in the optical lenses 400 of the electronic device 40, resulting in good image quality. This helps the electronic device 40 according to the present disclosure to have multiple shooting modes, such as optimized Selfie, low-light HDR (High Dynamic Range) imaging, and high-resolution 4K video recording. In addition, the user can directly view the captured image through the user interface (i.e., display screen, touch screen) 45 and manually operate the framing on the user interface 45 to achieve a WYSIWYG autofocus function.

[0185] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the appended claims.

Claims

1. An optical lens, characterized in that, Include: A microscope tube having an entrance aperture that allows light to enter the microscope tube; and An optical lens group, the lens barrel housing the optical lens group, and an optical axis passing through the optical lens group; The optical lens group includes: Multiple lenses; and At least one light-shielding sheet is an opaque sheet-like element that forms a light-passing hole around the optical axis. The light-shielding sheet includes an object-side surface and an image-side surface. The object-side surface is closer to the light-passing hole than the image-side surface. The object-side surface is provided with a first film layer, which is an alternating stack of high and low refractive index layers. The first film layer is illuminated using a D65 standard light source to obtain reflected light. A color index (CI) for this reflected light is defined using the CIE 1976 L*a*b* color space, where L* represents perceived brightness, a* represents green and red, and b* represents blue and yellow. The reflected light spectrum has a maximum reflectance between wavelengths of 380 nm and 780 nm. The wavelength range corresponding to this maximum reflectance, increasing by 50 nm and decreasing by 50 nm, is defined as a high reflectance range. The wavelength range between 380 nm and 780 nm, excluding this high reflectance range, is defined as a second reflectance range. The average reflectance of this high reflectance range is R0. high The average reflectance of this second reflectance range is R2, which satisfies the following condition: CI={(L*)×[(a*) 2 +(b*) 2 ]} 1 / 2 ; 8≤CI≤41; and 1.8≤R high / R2≤6.2。 2. The optical lens as described in claim 1, characterized in that, The color index is CI, and the average reflectance in this high reflectance range is R. high The average reflectance of this second reflectance range is R2, which satisfies the following condition: 11≤CI≤28; and 2.2≤R high / R2≤4.8。 3. The optical lens as described in claim 1, characterized in that, The wavelength corresponding to this maximum reflectivity is λ. RMax It satisfies the following conditions: 380nm≤λ RMax ≤580nm。 4. The optical lens as described in claim 3, characterized in that, The maximum reflectivity is R Max It satisfies the following conditions: 0.5％≤R Max ≤4％。 5. The optical lens as described in claim 1, characterized in that, The average reflectance of the reflected light in the wavelength range of 380 nm to 780 nm is R. 3878 It satisfies the following conditions: 0.1％≤R 3878 ≤2％。 6. The optical lens as described in claim 1, characterized in that, The color index at any two points on the first film layer has a difference, the absolute value of which is |ΔCI|, and satisfies the following condition: 0≤|ΔCI|≤4.

7.

7. The optical lens as described in claim 1, characterized in that, The first film layer is disposed from the light-transmitting hole in a direction away from the optical axis, and the coverage area of ​​the first film layer is smaller than the area of ​​the object's side surface.

8. The optical lens as described in claim 1, characterized in that, The number of the at least one light-shielding sheet is at least two, and the first film layer is provided on the object-side surface of each light-shielding sheet.

9. The optical lens as described in claim 8, characterized in that, The diameters of the light-transmitting holes of the at least two light-shielding sheets are different, and the diameter of the light-transmitting hole of the light-shielding sheet closer to the object side is larger than the diameter of the light-transmitting hole of the other light-shielding sheet.

10. The optical lens as described in claim 1, characterized in that, The thickness of the light-shielding sheet along one optical axis is Ts, and it satisfies the following condition: 7μm <Ts<50μm。 11. The optical lens as described in claim 1, characterized in that, The diameter of the entrance aperture is φb, and the diameter of the through aperture is φs. They satisfy the following conditions: φs < φb.

12. The optical lens as described in claim 11, characterized in that, The diameter of the entrance aperture is φb, and the diameter of the through aperture is φs. They satisfy the following conditions: 0.31≤(φb–φs) / φb≤0.

95.

13. The optical lens as described in claim 12, characterized in that, The maximum field of view (FOV) of this optical lens satisfies the following conditions: 93 degrees ≤ FOV ≤ 175 degrees.

14. The optical lens as described in claim 12, characterized in that, Along an optical axis, the distance from the object-side end of the lens barrel to the image-side end of the lens barrel is Db, and the distance from the object-side end of the lens barrel to the first film layer is Ds, which satisfy the following conditions: 0.05≤Ds / Db≤0.

41.

15. The optical lens as claimed in claim 1, characterized in that, One side of the microscope tube includes: A top wall, which forms the light entrance hole around the optical axis, and the top wall is provided with a second film layer; The second film layer is illuminated using a D65 standard light source to obtain reflected light. A color index of this reflected light is defined using the CIE 1976 L*a*b* color space, with CI2 as the color index. L* represents perceived brightness, a* represents green and red, and b* represents blue and yellow. The reflected light spectrum has a maximum reflectance between wavelengths of 380nm and 780nm. The wavelength range corresponding to this maximum reflectance, increasing by 50nm and decreasing by 50nm, is defined as a high reflectance range. The wavelength range between 380nm and 780nm, excluding this high reflectance range, is defined as a second reflectance range. The average reflectance of this high reflectance range is R2. high The average reflectance of this second reflectance range is R22, which satisfies the following condition: CI2={(L*)×[(a*) 2 +(b*) 2 ]} 1 / 2 ; 11≤CI2≤41; and 1.8≤R2 high / R22≤6.2。 16. The optical lens as claimed in claim 1, characterized in that, The light-shielding plate has a lens disposed on one object side, and the lens comprises: An optically effective region that allows the light ray to pass through; and A peripheral region, which is farther away from the optical axis than the optically effective region, wherein at least one of a peripheral object-side surface and a peripheral image-side surface of the peripheral region is provided with a third film layer. The third film layer is illuminated using a D65 standard light source to obtain reflected light. A color index of this reflected light is defined using the CIE 1976 L*a*b* color space, with a color index of CI3, where L* represents perceived brightness, a* represents green and red, and b* represents blue and yellow. This color index satisfies the following conditions: CI3={(L*)×[(a*) 2 +(b*) 2 ]} 1 / 2 ;as well as 11≤CI3≤75.

17. The optical lens as described in claim 16, characterized in that, The reflected light was obtained by irradiating the third film layer using a D65 standard light source. The spectrum of the reflected light has a maximum reflectivity between 380 nm and 780 nm. The wavelength range corresponding to this maximum reflectivity, increasing by 50 nm and decreasing by 50 nm, is a high reflectivity range. The wavelength range between 380 nm and 780 nm, excluding the high reflectivity range, is a second reflectivity range. The average reflectivity of the high reflectivity range is R3. high The average reflectance of this second reflectance range is R32, which satisfies the following condition: 2.5≤R3 high / R32≤34。 18. An electronic device, characterized in that, Include: The optical lens as described in claim 1.

Images