Optical image lens
The optical imaging lens design with a short-wavelength blocking lens and optimized parameters addresses the issue of short-wave and long-wave light interference, enhancing imaging quality and stability.
Patent Information
- Application Number
- CN202420974547.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-05-07
AI Technical Summary
Optical imaging lenses are adversely affected by short-wave and long-wave light, which degrade imaging quality.
An optical imaging lens design comprising five lenses, with the fourth lens acting as a short-wavelength blocking lens, having specific transmittance and focal length properties to intercept light in the 350nm to 400nm and 700nm to 750nm bands, along with optimized geometric and optical parameters to enhance light interception and minimize distortion.
The design effectively blocks short-wave and long-wave light, improving imaging quality by reducing their impact and ensuring stable imaging performance.
Smart Images
Figure CN222189571U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of optical imaging equipment, in particular to an optical imaging lens. Background Art
[0002] In recent years, with the continuous development of optical technology, people have put forward higher requirements for the imaging quality of optical imaging lenses. In the actual application of traditional optical imaging lenses, the imaging quality is easily affected by light of different bands, especially the long-wave infrared band and short-wave ultraviolet or high-energy blue light. The impact of short-wave and long-wave on imaging is difficult to improve. Therefore, how to block short-wave and long-wave light to ensure the imaging quality of optical imaging lenses has become a difficult point in current research.
[0003] That is to say, the optical imaging lens in the prior art has the problem that the long-wave light and the short-wave light affect the imaging quality. Utility Model Content
[0004] The main purpose of the utility model is to provide an optical imaging lens to solve the problem that the optical imaging lens in the prior art has long-wave light and short-wave light that affect the imaging quality.
[0005] In order to achieve the above-mentioned purpose, the utility model provides an optical imaging lens, which includes, from the object side to the image side, in order: a first lens; a second lens; a third lens; a fourth lens, at least the fourth lens has a negative optical focal length; and a fifth lens; wherein the fourth lens is a short-wavelength blocking lens, and the transmittance T3540 of the short-wavelength blocking lens for incident light in the wavelength band of 350nm to 400nm satisfies: T3540<5%, and the transmittance T7075 of the short-wavelength blocking lens for incident light in the wavelength band of 700nm to 750nm satisfies: T7075<15%.
[0006] Furthermore, the edge thickness ET4 of the fourth lens and the penetration distance D4P0 of the main light of the central field of view through the short wavelength blocking lens satisfy: 1.4 <ET4 / D4P0<2.3。
[0007] Furthermore, the distance D4P0 of the main light of the central field of view passing through the short wavelength blocking lens and the distance D4P10 of the main light of the 1.0 field of view passing through the short wavelength blocking lens satisfy: 1.4 <D4P10 / D4P0<2.4。
[0008] Furthermore, the optical path distance C3P10 of the main ray of the 1.0 field of view between the third lens and the fourth lens and the distance D4P10 of the main ray of the 1.0 field of view passing through the short wavelength blocking lens satisfy: 1.4 <C3P10 / D4P10<2.0。
[0009] Further, the on-axis distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens and the on-axis distance SAG32 between the intersection of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens satisfy: 2.0 <SAG41 / SAG32<2.3。
[0010] Further, the maximum effective radius DT41 of the object side surface of the fourth lens, the maximum effective radius DT42 of the image side surface of the fourth lens, and the on-axis distance SAG41 from the intersection of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens satisfy: 1.0<(DT42-DT41) / SAG41<1.3.
[0011] Furthermore, the maximum optical distortion |Dist| of the optical imaging lens satisfies: |Dist|<2.5%.
[0012] Furthermore, among the adjacent lenses of the first lens to the fifth lens, the axial interval between the third lens and the fourth lens is the largest, and the transmittance T5060 of the short wavelength blocking lens for incident light in the wavelength band of 500nm to 600nm satisfies: T5060>90%.
[0013] Further, the center thickness of the short-wavelength blocking lens is smaller than the edge thickness of the short-wavelength blocking lens.
[0014] Furthermore, the first lens has positive optical power; the second lens has negative optical power; the third lens has positive optical power or negative optical power; and the fifth lens has positive optical power or negative optical power.
[0015] By applying the technical solution of the utility model, the optical imaging lens comprises, from the object side to the image side, a first lens; a second lens; a third lens; a fourth lens, wherein the fourth lens has a negative optical focal length; and a fifth lens; wherein at least the fourth lens is a short-wavelength blocking lens, and the transmittance T3540 of the short-wavelength blocking lens for incident light in the wavelength band of 350nm to 400nm satisfies: T3540<5%, and the transmittance T7075 of the short-wavelength blocking lens for incident light in the wavelength band of 700nm to 750nm satisfies: T7075<15%.
[0016] The optical imaging lens of the present application is composed of five lenses from the first lens to the fifth lens. By setting the optical focal length of the fourth lens to be negative, it is beneficial for the fourth lens to receive the light from the front lens and to diverge and transfer the light to the fifth lens, ensuring that the fifth lens can stably receive the light from the fourth lens and transfer the light to the imaging surface, thereby ensuring imaging reliability. By setting the fourth lens to be a short-wavelength blocking lens, the penetration rate of incident light in the 350nm to 400nm band through the short-wavelength blocking lens is less than 5%, ensuring that most of the short-wavelength light is intercepted by the short-wavelength blocking lens, and the penetration rate of incident light in the 700nm to 750nm band through the short-wavelength blocking lens is less than 15%, ensuring that most of the long-wavelength light is intercepted by the short-wavelength blocking lens, thereby reducing the influence of short-wave and long-wavelength light on imaging quality, which is beneficial to improving the imaging quality of the optical imaging lens. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:
[0018] Figure 1 A dimension diagram of an optical imaging lens of an optional embodiment of the utility model is shown;
[0019] Figure 2 A schematic structural diagram of an optical imaging lens according to a first embodiment of the present utility model is shown;
[0020] Figure 3 Shows Figure 2 The optical distortion curve of the optical imaging lens in;
[0021] Figure 4 A schematic structural diagram of an optical imaging lens according to a second embodiment of the present utility model is shown;
[0022] Figure 5 Shows Figure 4 The optical distortion curve of the optical imaging lens in;
[0023] Figure 6 The transmittance curves of the optical imaging lens of an optional embodiment of the utility model and a conventional lens for light of various wavelengths are shown.
[0024] The above drawings include the following reference numerals:
[0025] E1, first lens; S1, object-side surface of the first lens; S2, image-side surface of the first lens; E2, second lens; S3, object-side surface of the second lens; S4, image-side surface of the second lens; E3, third lens; S5, object-side surface of the third lens; S6, image-side surface of the third lens; E4, fourth lens; S7, object-side surface of the fourth lens; S8, image-side surface of the fourth lens; E5, fifth lens; S9, object-side surface of the fifth lens; S10, image-side surface of the fifth lens; E6, protective glass; S11, imaging surface. DETAILED DESCRIPTION
[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.
[0028] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.
[0029] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.
[0030] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.
[0031] In this article, the paraxial area refers to the area near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial area; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial area. The judgment of the surface shape in the paraxial area can be based on the judgment method of ordinary knowledgeable people in this field, and the positive and negative R value (R refers to the radius of curvature of the paraxial area, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the convexity and concavity. For the light incident side, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; for the light exiting side, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface.
[0032] In order to solve the problem in the prior art that the optical imaging lens has long-wave light and short-wave light that affect the imaging quality, the utility model provides an optical imaging lens.
[0033] like Figures 1 to 6 As shown, in an optional embodiment of the present application, the optical imaging lens comprises, from the object side to the image side, a first lens; a second lens; a third lens; a fourth lens, the fourth lens having a negative optical focal length; and a fifth lens; wherein at least the fourth lens is a short-wavelength blocking lens, and the transmittance T3540 of the short-wavelength blocking lens for incident light in the wavelength band of 350nm to 400nm satisfies: T3540<5%, and the transmittance T7075 of the short-wavelength blocking lens for incident light in the wavelength band of 700nm to 750nm satisfies: T7075<15%.
[0034] The optical imaging lens of the present application is composed of five lenses from the first lens to the fifth lens. By setting the optical focal length of the fourth lens to be negative, it is beneficial for the fourth lens to receive the light from the front lens and transfer the light to the fifth lens, ensuring that the fifth lens can stably receive the light from the fourth lens and transfer the light to the imaging surface, thereby ensuring imaging reliability. By setting the fourth lens to be a short-wavelength blocking lens, the penetration rate of incident light in the 350nm to 400nm band through the short-wavelength blocking lens is less than 5%, ensuring that most of the short-wavelength light is intercepted by the short-wavelength blocking lens, and the penetration rate of incident light in the 700nm to 750nm band through the short-wavelength blocking lens is less than 15%, ensuring that most of the long-wavelength light is intercepted by the short-wavelength blocking lens, thereby reducing the impact of short-wave and long-wavelength light on imaging quality, which is beneficial to improving the imaging quality of the optical imaging lens.
[0035] It should be noted that the above short-wavelength and long-wavelength blocking lens partially intercepts short-wavelength light and long-wavelength light through doped plastic. By setting the fourth lens as the short-wavelength and long-wavelength blocking lens, on the basis of meeting the miniaturization of the optical imaging lens, it plays a good role in blocking light in the short-wavelength band and long-wavelength band, improving the imaging quality; at the same time, the optical imaging lens can have stable performance.
[0036] It should also be noted that in the specific embodiment of the present application, only the fourth lens is set as the short-wavelength and long-wavelength blocking lens. However, in other alternative embodiments, one or more of the first lens to the fifth lens can be set as the short-wavelength and long-wavelength blocking lens, which can be set according to actual needs.
[0037] In this embodiment, the edge thickness ET4 of the fourth lens and the penetration distance D4P0 of the chief ray in the central field of view passing through the short-wavelength and long-wavelength blocking lens satisfy: 1.4 < ET4 / D4P0 < 2.3. By constraining this conditional expression, the edge thickness of the fourth lens can be controlled, ensuring the performance stability of the short-wavelength and long-wavelength blocking lens, and helping to improve the molding feasibility of the short-wavelength and long-wavelength blocking lens, thereby improving the yield of the lens; by controlling the penetration distance of the chief ray in the central field of view passing through the short-wavelength and long-wavelength blocking lens, to increase the refraction and reflection process of light in the fourth lens, which is beneficial to increasing the reliability of the fourth lens in blocking short-wavelength band and long-wavelength band light, and thus increasing the imaging quality. Specifically, in an alternative embodiment of the present application, ET4 / D4P0 = 1.4; in another alternative embodiment of the present application, ET4 / D4P0 = 2.3.
[0038] In this embodiment, the distance D4P0 of the chief ray in the central field of view passing through the short-wavelength and long-wavelength blocking lens and the distance D4P10 of the chief ray in the 1.0 field of view passing through the short-wavelength and long-wavelength blocking lens satisfy: 1.4 < D4P10 / D4P0 < 2.4. By constraining this conditional expression and controlling D4P10 / D4P0, it helps to correct off-axis aberration and reduce the stray light phenomenon of the optical imaging lens, thereby ensuring the imaging quality. Specifically, in an alternative embodiment of the present application, D4P10 / D4P0 = 1.4; in another alternative embodiment of the present application, D4P10 / D4P0 = 2.4.
[0039] In this embodiment, the optical path distance C3P10 between the chief ray of the 1.0 field of view between the third lens and the fourth lens and the distance D4P10 that the chief ray of the 1.0 field of view passes through the short-wavelength wave-blocking lens satisfy: 1.4 < C3P10 / D4P10 < 2.0. By constraining this conditional expression, the position of the short-wavelength wave-blocking lens within the optical imaging lens is optimized to ensure that the range of light received by the short-wavelength wave-blocking lens is large enough, which is beneficial to improving the final imaging quality. Specifically, in an alternative embodiment of the present application, C3P10 / D4P10 = 1.4; in another alternative embodiment of the present application, C3P10 / D4P10 = 2.0.
[0040] In this embodiment, the axial distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object side surface of the fourth lens and the axial distance SAG32 between the intersection of the image side surface of the third lens and the optical axis and the vertex of the effective radius of the image side surface of the third lens satisfy: 2.0 < SAG41 / SAG32 < 2.3. By constraining this conditional expression, it is beneficial to adjust the curvature radii of the object side surface and the image side surface of the short-wavelength wave-blocking lens and the object side surface and the image side surface of the third lens within a suitable range, avoid light leakage in the lens, and improve the light propagation efficiency. Specifically, in an alternative embodiment of the present application, SAG41 / SAG32 = 2.0; in another alternative embodiment of the present application, SAG41 / SAG32 = 2.3.
[0041] In this embodiment, the maximum effective radius DT41 of the object side surface of the fourth lens, the maximum effective radius DT42 of the image side surface of the fourth lens, and the axial distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object side surface of the fourth lens satisfy: 1.0 < (DT42 - DT41) / SAG41 < 1.3. By constraining this conditional expression, the maximum effective radius of the object side surface of the fourth lens and the maximum effective radius of the image side surface of the fourth lens are controlled to ensure the finite radius of the short-wavelength wave-blocking lens, ensure that the distribution of the chemical substances doped in the lens is more uniform, so as to improve the blocking ability of interfering light in the low band and the high band; control the axial distance between the intersection of the object side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object side surface of the fourth lens, optimize the surface shape of the short-wavelength wave-blocking lens, make the imaging clearer, and can reduce the defects at the imaging edge. Specifically, in an alternative embodiment of the present application, (DT42 - DT41) / SAG41 = 1.0; in another alternative embodiment of the present application, (DT42 - DT41) / SAG41 = 1.3.
[0042] In this embodiment, the maximum optical distortion |Dist| of the optical imaging lens satisfies: |Dist|<2.5%. By controlling the maximum optical distortion of the optical imaging lens to be less than 2.5%, it is ensured that the optical imaging lens can restore the shape of the real object as much as possible, reduce the degree of deformation, improve the authenticity and reliability of imaging, and ensure the imaging quality.
[0043] In this embodiment, among the adjacent lenses from the first lens to the fifth lens, the axial spacing between the third lens and the fourth lens is the largest, which is conducive to ensuring that the fourth lens can collect most of the light transmitted from the front lens and ensure the light transmission efficiency.
[0044] In addition, the transmittance T5060 of the short-wavelength blocking lens for incident light in the 500nm to 600nm band satisfies: T5060>90%. This arrangement is conducive to ensuring that the short-wavelength blocking lens has a high transmittance for incident light in the 500nm to 600nm band, so as to meet the light intake of the optical imaging lens in the conventional band, improve the imaging brightness, and ensure that the imaging of the optical imaging lens is clearer and brighter.
[0045] In this embodiment, the center thickness of the short-wavelength blocking lens is less than the edge thickness of the short-wavelength blocking lens. By constraining the center thickness of the short-wavelength blocking lens, it is helpful to ensure the rationality of the thickness and shape of the short-wavelength blocking lens, so that it can effectively block the interfering light in the short-wavelength band and the long-wavelength band, and at the same time enhance the anti-degradation ability of the lens, thereby improving the durability of the short-wavelength blocking lens; by controlling the edge thickness of the short-wavelength blocking lens, the geometric shape of the lens is constrained, the rationality of the shape of the lens is ensured, the bearing stability of the lens is enhanced, and at the same time, the optical path of the incident light in the lens is ensured to be controllable, which helps to meet the requirements of miniaturization.
[0046] In this embodiment, the first lens has positive focal power. By setting the first lens to have positive focal power, it is beneficial for the first lens to converge light to ensure that the light can smoothly enter the rear lens. The second lens has negative focal power; the third lens has positive focal power or negative focal power; the fifth lens has positive focal power or negative focal power. Specifically, in the optional embodiment of the present application, the focal power of the third lens and the fifth lens is determined by the imaging effect required by the optical imaging lens and the coordination of the focal power of each lens in the optical system, and is not restricted in the present application.
[0047] Optionally, the optical imaging lens may further include a protective glass for protecting a photosensitive element located on the imaging surface.
[0048] The optical imaging lens in the present application may use multiple lenses, such as the five lenses mentioned above. In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The characteristics of an aspherical lens are: the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After using an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality.
[0049] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification. For example, although five lenses are described as an example in the embodiments, the optical imaging lens is not limited to including five lenses. If necessary, the optical imaging lens may also include other numbers of lenses.
[0050] Figure 1 A schematic diagram of the structure dimensions of an optical imaging lens of the present application is shown, wherein Figure 1 The parameters of C3P10, D4P10, SAG32, DT41, ET4, SAG41, D4P0, and DT42 are marked in the figure to clearly and intuitively understand the meaning of the parameters. In order to facilitate the optical imaging lens and the specific surface type, these parameters will no longer be reflected in the drawings when describing the specific embodiments later.
[0051] The following further describes examples of specific surface shapes and parameters of the optical imaging lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.
[0052] It should be noted that any one of the following embodiments 1 and 2 is applicable to all implementation methods of the present application.
[0053] Embodiment 1
[0054] like Figure 2 and Figure 3 As shown, the optical imaging lens of the first embodiment is described. Figure 2 A schematic structural diagram of an optical imaging lens according to the first embodiment is shown.
[0055] like Figure 2 As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a protective glass E6 and an imaging surface S11.
[0056] In this embodiment, the first lens E1 has positive focal power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is convex. The second lens E2 has negative focal power, the object side surface S3 of the second lens is concave, and the image side surface S4 of the second lens is concave. The third lens E3 has positive focal power or negative focal power, the object side surface S5 of the third lens is concave, and the image side surface S6 of the third lens is convex. The fourth lens E4 has negative focal power, the object side surface S7 of the fourth lens is concave, and the image side surface S8 of the fourth lens is concave. The fifth lens E5 has positive focal power or negative focal power, the object side surface S9 of the fifth lens is concave, and the image side surface S10 of the fifth lens is convex.
[0057] Table 1 shows the basic structural parameters of the optical imaging lens of Example 1, wherein the units of the curvature radius and thickness are both millimeters (mm).
[0058]
[0059]
[0060] Table 1
[0061] Table 2 shows the structural parameters of the optical imaging lens of Example 1, all in millimeters (mm).
[0062] Parameters / Examples Embodiment 1 C3P10 1.43 D4P10 1.00 D4P0 0.70 DT41 1.37 DT42 1.83 SAG32 0.21 SAG41 0.43 ET4 1.00
[0063] Table 2
[0064] Figure 3 The distortion curve of the optical imaging lens of the first embodiment is shown, which indicates the distortion magnitude values corresponding to different field angles. Figure 3 It can be seen that the optical imaging lens of the first embodiment can achieve good imaging quality.
[0065] Embodiment 2
[0066] like Figure 4 and Figure 5 As shown, the optical imaging lens of the second embodiment is described. Figure 2 A schematic structural diagram of an optical imaging lens according to a second embodiment is shown.
[0067] like Figure 4 As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a protective glass E6 and an imaging surface S11.
[0068] In this embodiment, the first lens E1 has positive focal power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is convex. The second lens E2 has negative focal power, the object side surface S3 of the second lens is concave, and the image side surface S4 of the second lens is concave. The third lens E3 has negative focal power, the object side surface S5 of the third lens is concave, and the image side surface S6 of the third lens is concave. The fourth lens E4 has negative focal power, the object side surface S7 of the fourth lens is concave, and the image side surface S8 of the fourth lens is concave. The fifth lens E5 has positive focal power, the object side surface S9 of the fifth lens is convex, and the image side surface S10 of the fifth lens is convex.
[0069] Table 3 shows the basic structural parameters of the optical imaging lens of Example 2, wherein the units of the curvature radius and thickness are both millimeters (mm).
[0070] Face number Surface type Radius of curvature thickness OBJ Spherical endless endless STO Spherical endless -0.6804 S1 Aspheric 1.7442 1.1126 S2 Aspheric -114.0833 0.2535 S3 Aspheric -24.2148 0.4004 S4 Aspheric 3.6214 0.8177 S5 Aspheric -283.6809 0.3466 S6 Aspheric 14.5643 1.349 S7 Aspheric -15.2898 0.3 S8 Aspheric 2.4764 0.105 S9 Aspheric 6.8716 0.7752 S10 Aspheric -8.9201 0.7308 S11 Spherical endless 0
[0071] Table 3
[0072] Table 4 shows the structural parameters of the optical imaging lens of Example 2, all in millimeters (mm).
[0073] Parameters / Examples Embodiment 2 C3P10 1.39 D4P10 0.68 D4P0 0.30 DT41 1.55 DT42 1.77 SAG32 0.08 SAG41 0.18 ET4 0.66
[0074] Table 4
[0075] Figure 5 The distortion curve of the optical imaging lens of the second embodiment is shown, which indicates the distortion magnitude values corresponding to different field angles. Figure 5 It can be seen that the optical imaging lens of the second embodiment can achieve good imaging quality.
[0076] In summary, the first embodiment and the second embodiment respectively satisfy the relationship shown in Table 5.
[0077] Conditional / Example Embodiment 1 Embodiment 2 D4P10 / D4P0 1.43 2.27 C3P10 / D4P10 1.43 2.04 ET4 / D4P0 1.43 2.20 SAG41 / SAG32 2.05 2.25 (DT42-DT41) / SAG41 1.07 1.22
[0078] Table 5
[0079] Table 6 shows the transmittance of an optical imaging lens of an optional embodiment of the present application and a conventional optical imaging lens in different bands. The comparison curve of the transmittance of the optical imaging lens of the present application and the conventional lens in different bands is obtained by fitting according to the data in Table 6. Figure 6 .
[0080]
[0081] Table 6
[0082] Table 7 shows the transmittance of conventional optical imaging lenses and the optical imaging lens of the present application in different wavelength ranges. Among them, the average transmittance of the optical imaging lens for incident light in the wavelength range of 350nm to 400nm is A, the average transmittance of the optical imaging lens for incident light in the wavelength range of 700nm to 750nm is B, and the transmittance of the optical imaging lens for incident light in the wavelength range of 500nm to 600nm is C.
[0083] Parameters / Experimental subjects Conventional optical imaging lens Optical imaging lens of the present application A(％) 8.42 1.23 B(％) 94.1 2.71 C(％) 89.64 90.00
[0084] Table 7
[0085] From Table 6, Table 7 and Figure 6 It can be seen that, compared with conventional lenses, the optical imaging lens of the present application has a good blocking effect on incident light in the 350nm to 400nm band and incident light in the 700nm to 750nm band, thereby ensuring that most low-band light and high-band light are blocked, preventing low-band light and high-band light from entering the imaging surface of the optical imaging lens and affecting the imaging quality, and can prevent high-band light from damaging components, which is beneficial to extending the service life of the optical imaging lens without affecting the stable imaging of normal imaging light.
[0086] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.
[0087] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0088] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.
[0089] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. An optical imaging lens, characterized in that: From the object side to the image side, they include: First lens; Second lens; The third lens; a fourth lens having negative optical power; The fifth lens; Among them, at least the fourth lens is a short-wavelength blocking lens, and the transmittance T3540 of the short-wavelength blocking lens for incident light in the 350nm to 400nm band satisfies: T3540<5%, and the transmittance T7075 of the short-wavelength blocking lens for incident light in the 700nm to 750nm band satisfies: T7075<15%.
2. The optical imaging lens according to claim 1, wherein: The edge thickness ET4 of the fourth lens and the penetration distance D4P0 of the main light of the central field of view through the short wavelength blocking lens satisfy: 1.4 <ET4 / D4P0<2.3。 3. The optical imaging lens according to claim 1, wherein: The distance D4P0 of the main light of the central field of view passing through the short wavelength blocking lens and the distance D4P10 of the main light of the 1.0 field of view passing through the short wavelength blocking lens satisfy: 1.4 <D4P10 / D4P0<2.4。 4. The optical imaging lens according to claim 1, wherein: The optical path distance C3P10 of the main ray of the 1.0 field of view between the third lens and the fourth lens and the distance D4P10 of the main ray of the 1.0 field of view passing through the short wavelength blocking lens satisfy: 1.4 <C3P10 / D4P10<2.0。 5. The optical imaging lens according to claim 1, wherein: The on-axis distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens and the on-axis distance SAG32 between the intersection of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens satisfy: 2.0 <SAG41 / SAG32<2.3。 6. The optical imaging lens according to claim 1, wherein: The maximum effective radius DT41 of the object side surface of the fourth lens, the maximum effective radius DT42 of the image side surface of the fourth lens, and the on-axis distance SAG41 from the intersection of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens satisfy the following: 1.0<(DT42-DT41) / SAG41<1.
3.
7. The optical imaging lens according to any one of claims 1 to 6, characterized in that: The maximum optical distortion |Dist| of the optical imaging lens satisfies: |Dist|<2.5%.
8. The optical imaging lens according to any one of claims 1 to 6, characterized in that: Among the adjacent lenses of the first lens to the fifth lens, the axial interval between the third lens and the fourth lens is the largest, and the transmittance T5060 of the short-wavelength blocking lens for incident light in the wavelength range of 500nm to 600nm satisfies: T5060>90%.
9. The optical imaging lens according to any one of claims 1 to 6, characterized in that: The center thickness of the short-wavelength blocking lens is smaller than the edge thickness of the short-wavelength blocking lens.
10. The optical imaging lens according to any one of claims 1 to 6, characterized in that: The first lens has positive optical power; The second lens has negative optical power; The third lens has positive or negative optical power; The fifth lens has positive refractive power or negative refractive power.