Image capturing lens system

Abstract

The image capturing lens system includes: a first lens having negative refractive power; a second lens having negative refractive power; a third lens having negative refractive power; a fourth lens having positive refractive power; a fifth lens having positive refractive power; a sixth lens having negative refractive power; a seventh lens having positive refractive power; and an eighth lens having a negative refractive power, in which the first to eighth lenses are disposed in order from an object side of the image capturing lens system, in which the first lens and the fourth lens are formed of a glass material, in which the second lens, the third lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens are formed of a plastic material, and in which the fifth lens, the sixth lens, the seventh lens, and the eighth lens are disposed in order from an object side of the image capturing lens system. The image capturing lens system has a total of eight lenses having refractive power.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of priority from Korean Patent Application No. 10-2019-0000280 filed in the Korean Intellectual Property Office on January 2, 2019, the disclosure of which is incorporated herein by reference in its entirety for all purposes. Technical Field

[0003] The following description relates to an image capturing lens system that can achieve constant optical performance regardless of temperature changes in the surrounding environment. Background Art

[0004] The small monitoring camera is configured to obtain image information in the monitoring area. For example, such a small monitoring camera can be installed on each of the front bumper and the rear bumper of the vehicle, etc., to provide the captured image to the driver.

[0005] Since early small surveillance cameras were configured to photograph nearby obstacles adjacent to the vehicle, the surveillance cameras had relatively low resolution, and the resolution of the surveillance changed significantly according to the temperature change from -40 degrees Celsius to 80 degrees Celsius. However, with the growing demand for the autonomous driving function of vehicles, it is necessary to develop a surveillance camera having a high resolution of 12 megapixels or more and constant optical characteristics even under extreme temperature conditions, and an image capturing lens system suitable for the surveillance camera. Summary of the invention

[0006] The purpose of providing this summary is to introduce a selection of inventive concepts in a concise form, and these inventive concepts will be further described in the following detailed description. This summary is not intended to identify the key features or essential features of the subject matter claimed, nor is it intended to help determine the scope of the subject matter claimed.

[0007] In a general aspect, an image capturing lens system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens disposed in order from an object side of the image capturing lens system. The first lens and the fourth lens are formed of a glass material, and the second lens, the third lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens are formed of a plastic material.

[0008] The second lens may have a concave object-side surface.

[0009] The second lens may have a convex image-side surface.

[0010] The eighth lens may have a convex object-side surface.

[0011] The eighth lens may have a concave image-side surface.

[0012] The second lens may have positive refractive power.

[0013] The eighth lens may have positive refractive power.

[0014] The sixth lens may have a refractive index less than 1.7.

[0015] The first lens may have an Abbe number greater than 40, and the third lens may have an Abbe number less than 30.

[0016] In another general aspect, an image capturing lens system includes a first lens having negative refractive power, a second lens having positive refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, a fifth lens having refractive power, a sixth lens having refractive power, a seventh lens having positive refractive power, and an eighth lens having refractive power. The first lens to the eighth lens are arranged in order from the object side.

[0017] The third lens may have a convex image-side surface.

[0018] The fifth lens may have a convex object-side surface or a convex image-side surface.

[0019] The sixth lens may include a concave object-side surface or a concave image-side surface.

[0020] The seventh lens may have a concave image-side surface.

[0021] The eighth lens may have a concave image-side surface.

[0022] The image capturing lens system may include a stop including an opening and the stop may be disposed between the fourth lens and the fifth lens, and a size of the opening may be controlled to adjust the intensity of light incident on one side of the fifth lens.

[0023] In another general aspect, an image capturing lens system includes: a first lens group including a first lens, a second lens, a third lens, and a fourth lens disposed in order from an object side of the image capturing lens system; and a second lens group including a fifth lens, a sixth lens, a seventh lens, and an eighth lens disposed in order from an object side of the image capturing lens system. At least one lens of the first lens to the fourth lens of the first lens group is formed of a glass material, and all lenses of the fifth lens to the eighth lens of the second lens group are formed of a plastic material.

[0024] The image capturing lens system may include a stop disposed between the first lens group and the second lens group.

[0025] Other features and aspects will become apparent from the following detailed description, the accompanying drawings, and the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A configuration of an image capturing lens system according to a first example is shown.

[0027] Figure 2 Shows Figure 1 Aberration curves of the image capturing lens system shown in .

[0028] Figure 3 A configuration of an image capturing lens system according to a second example is shown.

[0029] Figure 4 Shows Figure 3 Aberration curves of the image capturing lens system shown in .

[0030] Figure 5 is a cross-sectional view of a camera module including an image capturing lens system.

[0031] In all drawings and detailed description, the same reference numerals refer to the same elements. For the purpose of clarity, illustration and convenience, the drawings may not be drawn to scale, and the relative sizes, proportions and depictions of elements in the drawings may be exaggerated. DETAILED DESCRIPTION

[0032] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the method, device and / or system described in this application. However, after understanding the disclosure of this application, various changes, modifications and equivalences of the method, device and / or system described in this application will be apparent. For example, the order of operations described in this application is merely an example, and except for the operations that must occur in a specific order, it is not limited to the order set forth in this application, and obvious changes can be made after understanding the disclosure of this application. In addition, for greater clarity and brevity, the description of features well known in the art may be omitted.

[0033] The features described in this application can be implemented in different forms and should not be understood as being limited to the examples described in this application. More specifically, the examples described in this application are provided only to illustrate some of the many possible ways to implement the methods, devices and / or systems described in this application, which will be apparent after understanding the disclosure of this application.

[0034] It should be noted that in this application, the use of the term "may" with respect to examples or implementations, such as with respect to what an example or implementation may include or implement, means that there is at least one example or implementation that includes or implements such features, and all examples and implementations are not limited to this.

[0035] Throughout the specification, when an element such as a layer, a region, or a substrate is described as being “on,” “connected to,” or “coupled to” another element, the element may be directly “on,” “connected to,” or “coupled to” the other element, or one or more other elements may be present between the element and the other element. Conversely, when an element is described as being “directly on,” “directly connected to,” or “directly coupled to” another element, there may be no other elements between the element and the other element.

[0036] As used in this application, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0037] Although the terms "first", "second" and "third" may be used in this application to describe various components, parts, regions, layers or parts, these components, parts, regions, layers or parts are not limited by these terms. More specifically, these terms are only used to distinguish one component, part, region, layer or part from another component, part, region, layer or part. Therefore, without departing from the teachings of the examples described in this application, the first component, first component, first region, first layer or first part mentioned in the example may also be referred to as the second component, second component, second region, second layer or second part.

[0038] Spatially relative terms such as "above", "higher", "below", and "lower" may be used in this application for descriptive convenience to describe the relationship of one element relative to another element as shown in the accompanying drawings. In addition to covering the orientations depicted in the accompanying drawings, these spatially relative terms are intended to also cover different orientations of the device in use or operation. For example, if the device in the accompanying drawings is flipped, an element described as being "above" or "higher" relative to another element will be "below" or "lower" relative to the other element. Therefore, depending on the spatial orientation of the device, the term "above" covers both "above" and "below" orientations. The device may also be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatially relative terms used in this application should be interpreted accordingly.

[0039] The terms used in this application are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the articles "a", "an" and "the" are intended to include plural forms as well. The words "include", "comprise" and "have" illustrate the presence of the features, numbers, operations, components, elements and / or their combinations, but do not exclude the presence or addition of one or more other features, numbers, operations, components, elements and / or their combinations.

[0040] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described in the present application are not limited to the specific shapes shown in the drawings, but include variations in shapes that occur during manufacturing.

[0041] The features of the examples described in this application can be combined in various ways that will be apparent after understanding the disclosure of this application. In addition, although the examples described in this application have multiple configurations, other configurations that will be apparent after understanding the disclosure of this application are also possible.

[0042] Hereinafter, examples of the present disclosure will be described with reference to the accompanying drawings as follows.

[0043] In the example, the radius of curvature, thickness and focal length of the lens are all expressed in millimeters (mm). In addition, the thickness of the lens and the gap between the lenses are distances measured based on the optical axis of the lens.

[0044] In the description of the lens surface type, a convex lens surface means that the optical axis area of ​​the corresponding surface is convex, and a concave lens surface means that the optical axis area of ​​the corresponding surface is concave. Therefore, in a configuration where the lens surface is described as convex, the edge portion of the lens may be concave. In a similar manner, in a configuration where the lens surface is described as concave, the edge portion of the lens may be convex.

[0045] The image capturing lens system may include multiple lenses. For example, the image capturing lens system may include eight lenses. The image capturing lens system may be divided into multiple lens groups. For example, the image capturing lens system may be divided into a first lens group disposed in front of an aperture and a second lens group disposed behind the aperture. The first lens group includes four lenses (a first lens to a fourth lens) and includes one or more lenses formed of glass. For example, the first lens and the fourth lens of the first lens group may be formed of glass. The second lens group includes four lenses (a fifth lens to an eighth lens) and may include only lenses formed of plastic. In the following description, the first lens to the eighth lens of the image capturing lens system will be described.

[0046] The first lens may have a refractive power. For example, the first lens may have a negative refractive power.

[0047] The first lens may have a convex surface. For example, the first lens may have a convex object-side surface.

[0048] The first lens may be formed of a material having high light transmittance and low thermal deformation. For example, the first lens may be formed of a glass material.

[0049] The first lens may have a predetermined refractive index. For example, the first lens may have a refractive index of 1.7 or greater. The first lens may have a predetermined Abbe number. For example, the first lens may have an Abbe number greater than 40.

[0050] The second lens may have a refractive power. For example, the second lens may have a positive refractive power or a negative refractive power.

[0051] The second lens may have a concave surface. For example, the second lens may have a concave object-side surface.

[0052] The second lens may include a spherical surface. For example, both surfaces of the second lens may be spherical. The second lens may be formed of a material having high light transmittance and improved processability. For example, the second lens may be formed of a plastic material.

[0053] The second lens may have a predetermined refractive index. For example, the second lens may have a refractive index less than 1.6. The second lens may have a predetermined Abbe number. For example, the second lens may have an Abbe number greater than that of the first lens.

[0054] The third lens may have refractive power. For example, the third lens may have negative refractive power.

[0055] The third lens may have a convex surface. For example, the third lens may have a convex object-side surface.

[0056] The third lens may be formed of a material having high light transmittance and improved processability. For example, the third lens may be formed of a plastic material.

[0057] The third lens may have a predetermined refractive index. For example, the third lens may have a refractive index of 1.60 or greater. The third lens may have a predetermined Abbe number. For example, the third lens may have an Abbe number smaller than the Abbe number of the first lens. For example, the third lens may have an Abbe number less than 30.

[0058] The fourth lens may have refractive power. For example, the fourth lens may have positive refractive power.

[0059] The fourth lens may have at least one convex surface. For example, the fourth lens may have a convex object-side surface or a convex image-side surface, or may have a convex object-side surface and a convex image-side surface.

[0060] The fourth lens may be formed of a material having high light transmittance and low thermal deformation. For example, the fourth lens may be formed of a glass material.

[0061] The fourth lens may have a predetermined refractive index. For example, the fourth lens may have a refractive index of 1.7 or more. The fourth lens may have an Abbe number greater than that of the third lens. For example, the fourth lens may have an Abbe number of 40 or more.

[0062] The fifth lens may have refractive power. The fifth lens may have at least one convex surface. For example, the fifth lens may have a convex object-side surface or a convex image-side surface, or may have a convex object-side surface and a convex image-side surface.

[0063] The fifth lens may be formed of a material having high light transmittance and low manufacturing cost. For example, the fifth lens may be formed of a plastic material.

[0064] The fifth lens may have a predetermined refractive index. For example, the fifth lens may have a refractive index less than 1.6. The fifth lens may have an Abbe number greater than Abbe numbers of adjacent lenses (the fourth lens and the sixth lens).

[0065] The sixth lens may have refractive power. The sixth lens may have at least one concave surface. For example, the sixth lens may have a concave object-side surface or a concave image-side surface, or may have a concave object-side surface and a concave image-side surface.

[0066] The sixth lens may be formed of a material having high light transmittance and low manufacturing cost. For example, the sixth lens may be formed of a plastic material.

[0067] The sixth lens may have a predetermined refractive index. For example, the sixth lens may have a refractive index of 1.6 or more. The sixth lens may have a predetermined Abbe number. For example, the sixth lens has an Abbe number smaller than the Abbe number of the adjacent lenses (the fifth lens and the seventh lens).

[0068] The seventh lens may have refractive power. For example, the seventh lens may have positive refractive power.

[0069] The seventh lens may have a convex surface. For example, the seventh lens may have a convex object-side surface or a convex image-side surface.

[0070] The seventh lens may be formed of a material having high light transmittance and low manufacturing cost. For example, the seventh lens may be formed of a plastic material.

[0071] The seventh lens may have a predetermined refractive index. For example, the seventh lens may have a refractive index less than 1.6. The seventh lens may have an Abbe number greater than that of the sixth lens. For example, the seventh lens may have an Abbe number of 50 or more.

[0072] The eighth lens may have a refractive power. The eighth lens may have a concave surface. For example, the eighth lens may have a concave image-side surface. The eighth lens may have a shape including an inflection point. For example, an inflection point is formed on at least one of the object-side surface and the image-side surface of the eighth lens.

[0073] The eighth lens may be formed of a material having high light transmittance and low manufacturing cost. For example, the eighth lens may be formed of a plastic material.

[0074] The eighth lens may have a predetermined refractive index. For example, the eighth lens may have a refractive index less than 1.6. The eighth lens may have an Abbe number greater than that of the sixth lens. For example, the eighth lens may have an Abbe number of 50 or more.

[0075] The image capturing lens system includes an image sensor. The image sensor may be configured to achieve high resolution. The surface of the image sensor may form an imaging surface, and an image is formed on the imaging surface.

[0076] The image capturing lens system includes an aperture. The aperture may be disposed between a lens formed of a glass material and a lens formed of a plastic material. For example, the aperture may be disposed between the fourth lens and the fifth lens, and the position of the aperture is not limited thereto. The aperture may be configured to adjust the opening size. For example, the aperture may be fully opened to allow all light incident from the object side to pass through, or may be partially opened to allow a portion of the incident light to pass through. The image capturing lens system may have an F No. of 1.6 to 4.2. The aperture may adjust the intensity of light incident on the image sensor, and may reduce resolution degradation caused by thermal deformation of the plastic lens.

[0077] The image capture lens system includes a plurality of filters. For example, the image capture lens system may include a first filter configured to block foreign matter and a second filter configured to block infrared light. The functions of the first filter and the second filter may be changed.

[0078] The image capturing lens system includes a plurality of lenses formed of plastic to reduce manufacturing costs. In addition, the image capturing lens system may include two or more lenses formed of glass to reduce resolution degradation caused by thermal deformation of the plastic lens. The image capturing lens system configured as above may be used for surveillance cameras for vehicles and cameras requiring a wide viewing angle, such as surveillance cameras for drones.

[0079] The image capturing lens system is configured to satisfy at least one of the following conditional expressions.

[0080] Conditional expression 1 F No. < 1.7

[0081] Conditional expression 2 Nd6<1.7

[0082] Conditional expression 3 1.7<(Nd1+Nd4) / 2

[0083] Conditional expression 4 (Nd5+Nd6+Nd7+Nd8) / 4<1.6

[0084] Conditional Expression 5 40 <V1

[0085] Conditional Expression 6 V3<30

[0086] Conditional expression 7 V2-V1<10

[0087] Conditional Expression 8 30 <V2-V3

[0088] Conditional expression 9 D23 <D12

[0089] Conditional expression 10 4 <D45 / D23<10

[0090] In the conditional expression, Nd1 is the refractive index of the first lens, Nd4 is the refractive index of the fourth lens, Nd5 is the refractive index of the fifth lens, Nd6 is the refractive index of the sixth lens, Nd7 is the refractive index of the seventh lens, Nd8 is the refractive index of the eighth lens, V1 is the Abbe number of the first lens, V2 is the Abbe number of the second lens, V3 is the Abbe number of the third lens, D12 is the distance from the image side surface of the first lens to the object side surface of the second lens, D23 is the distance from the image side surface of the second lens to the object side surface of the third lens, and D45 is the distance from the image side surface of the fourth lens to the object side surface of the fifth lens.

[0091] Hereinafter, an image capturing lens system according to an example will be described below.

[0092] Now refer to Figure 1 An image capturing lens system 100 according to a first example is described.

[0093] The image capturing lens system 100 includes a plurality of lenses, each of which has a refractive index. For example, the image capturing lens system 100 includes a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, a sixth lens 160, a seventh lens 170, and an eighth lens 180.

[0094] The first lens 110 has a negative refractive power and has a convex object side surface and a concave image side surface. The second lens 120 has a positive refractive power and has a concave object side surface and a convex image side surface. The third lens 130 has a negative refractive power and has a concave object side surface and a convex image side surface. The fourth lens 140 has a positive refractive power and has a convex object side surface and a convex image side surface. The fifth lens 150 has a positive refractive power and has a convex object side surface and a convex image side surface. The sixth lens 160 has a negative refractive power and has a concave object side surface and a concave image side surface. The seventh lens 170 has a positive refractive power and has a convex object side surface and a concave image side surface. The eighth lens 180 has a positive refractive power and has a convex object side surface and a concave image side surface. An inflection point is formed on the object side surface and the image side surface of the eighth lens 180.

[0095] The image capturing lens system 100 includes a lens formed of a glass material to exhibit optical performance independent of temperature changes depending on the external environment. Figure 1 In the example of FIG. 1 , the first lens 110 and the fourth lens 140 are formed of a glass material. In addition, the image capturing lens system 100 includes a plurality of plastic lenses to reduce manufacturing costs and reduce product weight. Figure 1 In the example, the second lens 120, the third lens 130, and the fifth to eighth lenses 150 to 180 are formed of a plastic material.

[0096] The image capturing lens system 100 includes a stop ST. The stop ST is disposed between the fourth lens 140 and the fifth lens 150. The image capturing lens system 100 includes filters 190 and 192 disposed between the eighth lens 180 and the imaging surface 196. The filters 190 and 192 can block infrared light and prevent contamination of the imaging surface caused by foreign matter.

[0097] The image capturing lens system 100 may have a predetermined field of view (FOV). For example, the overall FOV of the image capturing lens system 100 is 64.09 degrees. The F No. of the image capturing lens system 100 is 1.640. The total length TL of the image capturing lens system 100 is 28.50 mm.

[0098] Table (1) lists the lens characteristics of the image capturing lens system 100 .

[0099] Table (1)

[0100]

[0101] Figure 2 Aberration curves of the image capturing lens system 100 are shown.

[0102] In the following, reference will be made to Figure 3 An image capturing lens system 200 according to a second example is described.

[0103] The first lens 210 has negative refractive power, and has a convex object side surface and a concave image side surface. The second lens 220 has negative refractive power, and has a concave object side surface and a convex image side surface. The third lens 230 has negative refractive power, and has a convex object side surface and a concave image side surface. The fourth lens 240 has positive refractive power, and has a convex object side surface and a convex image side surface. The fifth lens 250 has positive refractive power, and has a convex object side surface and a convex image side surface. The sixth lens 260 has negative refractive power, and has a concave object side surface and a concave image side surface. The seventh lens 270 has positive refractive power, and has a convex object side surface and a convex image side surface. The eighth lens 280 has negative refractive power, and a convex object side surface and a concave image side surface. An inflection point is formed on the object side surface and the image side surface of the eighth lens 280.

[0104] The image capturing lens system 200 includes a lens formed of a glass material to exhibit constant optical performance regardless of temperature changes depending on the external environment. Figure 3 In the example of FIG. 2 , the first lens 210 and the fourth lens 240 are formed of glass materials. In addition, the image capturing lens system 200 includes a plurality of plastic lenses to reduce manufacturing costs and reduce product weight. Figure 3 In the example, the second lens 220, the third lens 230, and the fifth lens 250 to the eighth lens 280 are formed of a plastic material.

[0105] The image capturing lens system 200 includes a stop ST. The stop ST is disposed between the fourth lens 240 and the fifth lens 250. The image capturing lens system 200 includes filters 290 and 292 disposed between the eighth lens 280 and the imaging surface 296. The filters 290 and 292 can block infrared light and prevent contamination of the imaging surface caused by foreign matter.

[0106] The image capturing lens system 200 may have a predetermined field of view (FOV). For example, the total length TL of the image capturing lens system 200 may be 23.0 mm.

[0107] Table (2) lists the lens characteristics of the image capturing lens system 200.

[0108] Table (2)

[0109]

[0110]

[0111] Figure 4 Aberration curves of the image capturing lens system 200 are shown.

[0112] Table (3) lists the values ​​of the conditional expressions of the first example and the second example.

[0113] Table (3)

[0114] mark Conditional Expressions First example Second example 1 F No 1.650 1.650 2 Nd6 1.640 1.640 3 (Nd1+Nd4) / 2 1.772 1.772 4 (Nd5+Nd6+Nd7+Nd8) / 4 1.561 1.561 5 V1 49.0 49.0 6 V3 23.0 23.0 7 V2-V1 7.0 7.0 8 V2-V3 33.0 33.0 9 D23 <D12 2.325(D12-D23) 1.799(D12-D23) 10 D45 / D23 8.449 5.356

[0115] In the following, reference will be made to Figure 5 A camera module 10 according to an example is described.

[0116] The camera module 10 includes one or more image capturing lens systems according to the above examples (for reference, Figure 5The image capturing lens system shown in has a configuration like the image capturing lens system 100 according to the first example. The camera module 10 is configured so that the optical performance of the image capturing lens system is constantly maintained regardless of temperature changes. For example, the camera module 10 includes a lens barrel 20 and a housing 30 having different linear thermal expansion coefficients. The linear thermal expansion coefficient of the lens barrel 20 is 2×10 -5 Up to 5×10 -5 , and the linear thermal expansion coefficient of the housing 30 is 2×10 -5 Up to 6×10 -5 .

[0117] The camera module 10 is configured to separately accommodate a lens portion of the image capturing lens system 100 and an imaging surface (image sensor) 196. For example, the lens portion of the image capturing lens system 100 is accommodated in the lens barrel 20, and the imaging surface 196 of the image capturing lens system 100 is accommodated in the housing 30. The housing 30 may further include an additional substrate 40 to support the imaging surface 196.

[0118] The length of the lens barrel 20 may be determined based on a change in the back focal length (BFL) of the image capturing lens system 100 as the temperature changes. For example, a distance h1 from a joining position B of the lens barrel 20 and the housing 30 to the lower end of the lens barrel 20 may be determined based on the BFL of the image capturing lens system 100, a linear thermal expansion coefficient of the lens barrel 20, and the like. Alternatively, a distance h1 from a joining position B of the lens barrel 20 and the housing 30 to the lower end of the lens barrel 20 may be determined by a difference between the linear thermal expansion coefficients of the lens barrel 20 and the housing 30.

[0119] Similarly, the joining position B of the lens barrel 20 and the housing 30 may be determined based on the change in the BFL of the image capturing lens system 100 as the temperature changes. For example, the distance h2 from the joining position B to the imaging surface 196 may be determined based on the BFL of the image capturing lens system 100, the linear thermal expansion coefficient of the lens barrel 20, etc. Alternatively, the distance h2 from the joining position B to the imaging surface 196 may be determined by the difference between the linear thermal expansion coefficient of the lens barrel 20 and the linear thermal expansion coefficient of the housing 30.

[0120] As described above, the image capturing lens system according to the examples of the present disclosure can realize high-pixel and high-resolution images.

[0121] Although the present disclosure includes specific examples, it will be apparent after understanding the disclosure of the present application that various changes in form and detail may be made to these examples without departing from the spirit and scope of the claims and their equivalents. The examples described in this application should be considered only in a descriptive sense and not for limiting purposes. The description of the features or aspects in each example should be considered to be applicable to similar features or aspects in other examples. Suitable results may also be obtained if the described techniques are performed in a different order, and / or if the components in the described systems, architectures, devices, or circuits are replaced or supplemented in different ways and / or by other components or their equivalents. Therefore, the scope of the present disclosure should not be limited by specific embodiments, but by claims and their equivalents, and all variations within the scope of the claims and their equivalents should be understood to be included in the present disclosure.

Claims

1. An image capturing lens system, comprising: A first lens element having negative refractive power; The second lens has negative refractive power; A third lens element having negative refractive power; a fourth lens element having positive refractive power; a fifth lens element having positive refractive power; a sixth lens element having negative refractive power; A seventh lens element having positive refractive power; as well as The eighth lens has negative refractive power. Wherein, the first lens to the eighth lens are arranged in sequence from the object side of the image capturing lens system, Wherein, the first lens and the fourth lens are formed of glass material, wherein the second lens, the third lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are formed of plastic material, and The image capturing lens system has a total of eight lenses with refractive power.

2. The image capturing lens system according to claim 1, wherein: The first lens has a convex object-side surface.

3. The image capturing lens system according to claim 1, wherein: The second lens has a concave object-side surface.

4. The image capturing lens system according to claim 1, wherein: The third lens has a convex object-side surface.

5. The image capturing lens system according to claim 1, wherein: The fourth lens has a convex object-side surface.

6. The image capturing lens system according to claim 1, wherein: The fifth lens has a convex object-side surface.

7. The image capturing lens system according to claim 1, wherein: The sixth lens has a concave object-side surface.

8. The image capturing lens system according to claim 1, wherein: The seventh lens element has a convex object-side surface.

9. An image capturing lens system, comprising: A first lens element having negative refractive power; The second lens has negative refractive power; A third lens element having negative refractive power; a fourth lens element having positive refractive power; a fifth lens element having positive refractive power; a sixth lens element having negative refractive power; A seventh lens element having positive refractive power; as well as The eighth lens has negative refractive power. Wherein, the first lens to the eighth lens are arranged in sequence from the object side of the image capturing lens system; The image capturing lens system has a total of eight lenses with refractive power, and Wherein, Nd6<1.7, wherein ND6 is the refractive index of the sixth lens.

10. The image capturing lens system according to claim 9, wherein: The first lens has a convex object-side surface.

11. The image capturing lens system according to claim 9, wherein: The second lens has a concave object-side surface.

12. The image capturing lens system according to claim 9, wherein: The third lens has a convex object-side surface.

13. The image capturing lens system according to claim 9, wherein: The fourth lens has a convex object-side surface.

14. The image capturing lens system according to claim 9, wherein: The fifth lens has a convex object-side surface.

15. The image capturing lens system according to claim 9, wherein: The sixth lens has a concave object-side surface.

16. The image capturing lens system according to claim 9, wherein: The seventh lens element has a convex object-side surface.

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