Optical image capturing system

Abstract

The optical image capturing system includes: a first lens group including two or more lenses; and a second lens group including two or more lenses. The first lens group and the second lens group are sequentially arranged from an object side, and the second lens group is configured to be movable in an optical axis direction. 0.8 lt; tTL / f < lt >; and 1.2. Here, TTL is a distance from an object-side surface of a foremost lens of the first lens group to an imaging surface, and f is a focal length of the optical imaging system.

Description

[0001] Cross-references to related applications

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2021-0167234, filed on November 29, 2021, with the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference for all purposes. Technical Field

[0003] This disclosure relates to an optical imaging system configured to perform macroscopic photography. Background Technology

[0004] A mobile terminal may include multiple camera modules. For example, a mobile terminal may include a first camera module mounted on the front surface of the terminal body and a second camera module mounted on the rear surface of the terminal body. The first camera module and the second camera module may have different optical characteristics. For example, the first camera module may include a wide-angle optical imaging system to enable video calls and allow the user of the mobile terminal to take selfies, and the second camera module may include an optical imaging system with a relatively long focal length to capture images of objects located at long or intermediate distances. Therefore, it is difficult to capture images of objects located at intermediate and long distances using the first camera module of the mobile terminal, and it is difficult to capture images of objects located at short or very short distances using the second camera module.

[0005] The above information is presented as background information only to aid in understanding this disclosure. No determination or assertion is made as to whether any of the above content can be used as prior art with respect to this disclosure. Summary of the Invention

[0006] The summary portion of this invention is intended to provide a brief overview of the chosen inventive concepts, which will be further described in the detailed description portion below. This summary portion is not intended to identify key or essential features of the claimed subject matter, nor to help determine the scope of the claimed subject matter.

[0007] In one general aspect, the optical imaging system includes: a first lens group comprising two or more lenses; and a second lens group comprising two or more lenses. The first and second lens groups are arranged sequentially from the object side, the second lens group being configured to be movable in the direction of the optical axis, and 0.8 < TTL / f < 1.2, where TTL is the distance from the object side of the foremost lens of the first lens group to the imaging plane, and f is the focal length of the optical imaging system.

[0008] |fG1 / fG2| can be greater than 0.7 and less than 1.4, where fG1 is the focal length of the first lens group, and fG2 is the focal length of the second lens group.

[0009] The first lens group may include a first lens, a second lens, and a third lens arranged in order from the object side.

[0010] The first lens may have a positive refractive power, the second lens may have a negative refractive power, and the third lens may have a positive refractive power.

[0011] f3 / f can be greater than 0.32 and less than 0.82, where f3 is the focal length of the third lens.

[0012] The image side surface of the third lens may be convex.

[0013] The second lens group may include a fourth lens, a fifth lens, and a sixth lens arranged in order from the object side.

[0014] Two of the fourth lens to the sixth lens may have a negative refractive power.

[0015] TTL / IMG HT can be greater than 4.0 and less than 7.0, where IMG HT is the height of the imaging surface.

[0016] In another general aspect, an optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in order from the object side, the image side surface of the third lens is convex, and 0.8 < TTL / f < 1.2, 0.32 < f3 / f < 0.82, and -1.0 < R1 / R4 < 1.0, where TTL is the distance from the object side surface of the first lens to the imaging surface, f is the focal length of the optical imaging system, f3 is the focal length of the third lens, R1 is the radius of curvature of the object side surface of the first lens, and R4 is the radius of curvature of the image side surface of the second lens.

[0017] The image side surface of the second lens may be concave.

[0018] The image side surface of the fifth lens may be convex.

[0019] The object side surface of the sixth lens may be concave.

[0020] The fourth lens may have a positive refractive power.

[0021] The fifth lens may have a negative refractive power.

[0022] BFL / f can be greater than 0.23 and less than 0.46, where BFL is the distance from the image side surface of the sixth lens to the imaging surface.

[0023] In another general aspect, the optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially from the object side and divided into a first lens group and a second lens group, each having two or more lenses, wherein the second lens group is disposed toward the image side of the first lens group and configured to be movable in the optical axis direction, and wherein the optical imaging system includes no more than six lenses.

[0024] The first lens group may include the first lens to the third lens, and the second lens group may include the fourth lens to the sixth lens.

[0025] TTL / f can be greater than 0.8 and less than 1.2, where TTL is the distance from the object side of the first lens to the imaging plane, and f is the focal length of the optical imaging system.

[0026] The first lens group may include the first to the fourth lens, and the second lens group may include the fifth and the sixth lens.

[0027] TTL / f can be greater than 0.8 and less than 1.2, f3 / f can be greater than 0.32 and less than 0.82, and R1 / R4 can be greater than -1.0 and less than 1.0, where TTL is the distance from the object side of the first lens to the image plane, f is the focal length of the optical imaging system, f3 is the focal length of the third lens, R1 is the radius of curvature of the object side of the first lens, and R4 is the radius of curvature of the image side of the second lens.

[0028] Other features and aspects will become apparent from the appended claims, the accompanying drawings, and the detailed description below. Attached Figure Description

[0029] Figure 1 This is a view illustrating an optical imaging system according to a first exemplary embodiment of the present disclosure.

[0030] Figure 2 It shows a representation Figure 1 The graph shows the aberration characteristics of the optical imaging system.

[0031] Figure 3 This is a view illustrating an optical imaging system according to a second exemplary embodiment of the present disclosure.

[0032] Figure 4 It shows a representation Figure 3 The graph shows the aberration characteristics of the optical imaging system.

[0033] Figure 5 This is a view illustrating an optical imaging system according to a third exemplary embodiment of the present disclosure.

[0034] Figure 6 It shows a representation Figure 5 The graph shows the aberration characteristics of the optical imaging system.

[0035] Figure 7 This is a view illustrating an optical imaging system according to a fourth exemplary embodiment of the present disclosure.

[0036] Figure 8 It shows a representation Figure 7 The graph shows the aberration characteristics of the optical imaging system.

[0037] Figure 9 This is a view illustrating an optical imaging system according to a fifth exemplary embodiment of the present disclosure.

[0038] Figure 10 It shows a representation Figure 9 The graph shows the aberration characteristics of the optical imaging system.

[0039] Figure 11 This is a view illustrating an optical imaging system according to a sixth exemplary embodiment of the present disclosure.

[0040] Figure 12 It shows a representation Figure 11 The graph shows the aberration characteristics of the optical imaging system.

[0041] Figure 13 This is a view illustrating an optical imaging system according to a seventh exemplary embodiment of the present disclosure.

[0042] Figure 14 It shows a representation Figure 13 The graph shows the aberration characteristics of the optical imaging system.

[0043] Figure 15 This is a view illustrating an optical imaging system according to an eighth exemplary embodiment of the present disclosure.

[0044] Figure 16 It shows a representation Figure 15 The graph shows the aberration characteristics of the optical imaging system.

[0045] Figure 17 This is a view illustrating an optical imaging system according to a ninth exemplary embodiment of the present disclosure.

[0046] Figure 18 It shows a representation Figure 17 The graph shows the aberration characteristics of the optical imaging system.

[0047] Figure 19This is a view illustrating another form of the optical imaging system according to the first exemplary embodiment to the ninth exemplary embodiment.

[0048] Throughout the accompanying drawings and detailed embodiments, the same reference numerals refer to the same elements. For purposes of clarity, illustration, and convenience, the drawings may not be drawn to scale, and the relative dimensions, scale, and depiction of elements in the drawings may be exaggerated. Detailed Implementation

[0049] In the following description, exemplary embodiments of the present disclosure are described in detail with reference to the accompanying drawings; however, it should be noted that the examples are not limited thereto.

[0050] The following detailed embodiments are provided to aid the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents to the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein, except for operations that must occur in a specific order, as will become apparent upon understanding this disclosure. Furthermore, for clarity and brevity, descriptions of features well-known in the art may be omitted.

[0051] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein are provided merely to illustrate some of the many possible ways in which the methods, apparatuses, and / or systems described herein will become apparent upon understanding this disclosure.

[0052] Throughout this specification, when an element such as a layer, region, or substrate is described as being "on," "connected to," or "attached to" another element, the element may be directly "on," directly "connected to," or directly "attached to" the other element, or there may be one or more other elements between the element and the other element. Conversely, when an element is described as being "directly on," "directly connected to," or "directly attached to" another element, there are no other elements between the element and the other element.

[0053] As used herein, the term “and / or” includes any one of the associated listed items and any combination of any two or more items; similarly, “at least one” includes any one of the associated listed items and any combination of any two or more items.

[0054] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited by these terms. Rather, these terms are used only to distinguish one component, part, region, layer, or section from another. Therefore, without departing from the teachings of the examples described herein, the first component, first part, first region, first layer, or first section mentioned in these examples may also be referred to as a second component, second part, second region, second layer, or second section.

[0055] Spatial relative terms such as “above,” “above,” “below,” and “below” may be used herein for descriptive convenience to describe the relationship of one element relative to another, as shown in the accompanying drawings. In addition to covering the orientation depicted in the drawings, these spatial relative terms are intended to also cover different orientations of the device in use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “above” another element would be located “below” or “below” that other element. Thus, depending on the spatial orientation of the device, the term “above” covers both orientations of “above” and “below”. The device may also be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0056] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the articles “a,” “an,” and “the” are intended to include the plural form as well. The terms “comprising,” “including,” and “having” indicate the presence of the stated features, numbers, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, operations, components, elements, and / or combinations thereof.

[0057] In describing this disclosure below, the terminology used to refer to the components of this disclosure will be named in consideration of the function of each component and therefore should not be construed as limiting technical components of this disclosure.

[0058] Variations in the shapes shown in the figures may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the figures, but include shape variations that may occur during manufacturing.

[0059] It should be noted that in this document, the term "may" is used relative to examples, such as regarding what an example may include or implement, meaning that there exists at least one example that includes or implements such a feature, but not all examples are limited to this.

[0060] The features of the examples described herein can be combined in various ways that will become apparent upon understanding this disclosure. Furthermore, although the examples described herein have multiple configurations, other configurations that will become apparent upon understanding this disclosure are also possible.

[0061] One aspect of this disclosure provides an optical imaging system capable of performing close-up or macro photography using a camera module with scalable characteristics.

[0062] In the accompanying 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 merely illustrative. That is to say, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings.

[0063] In this specification, the first lens refers to the lens closest to the object (or subject), while the sixth lens refers to the lens closest to the imaging plane (or image sensor). Furthermore, in this specification, the radius of curvature and thickness of the lens, TTL (distance from the object side of the first lens to the imaging plane), IMG HT (height of the imaging plane), focal length, effective radius, etc., are all expressed in millimeters (mm), and the field of view (FOV) is expressed in degrees.

[0064] Furthermore, the lens thickness, the distance between lenses, and the TTL are distances measured based on the optical axes of the lenses. Additionally, in the description of lens shape, a convex surface means that the paraxial region of the corresponding surface is convex, and a concave surface means that the paraxial region of the corresponding surface is concave. Therefore, although one surface of the lens is described as convex, the edge portion of the lens may be concave. Similarly, although one surface of the lens is described as concave, the edge portion of the lens may be convex.

[0065] The optical imaging system described herein can be configured for installation in mobile electronic devices. For example, it can be installed in smartphones, laptops, augmented reality devices, virtual reality devices, portable game consoles, etc. However, the applications and examples of the optical imaging system described herein are not limited to the aforementioned electronic devices. For instance, it can be applied to small or mobile electronic devices that require high-resolution image capture but offer limited installation space.

[0066] The optical imaging system according to a first aspect of this disclosure may include two lens groups. For example, the optical imaging system may include a first lens group having two or more lenses and a second lens group having two or more lenses. The first lens group and the second lens group may be arranged sequentially from the object side. In detail, the second lens group may be arranged on the image side (i.e., the rear side) of the first lens group.

[0067] The optical imaging system according to the first aspect of this disclosure may further include an image sensor configured to convert optical signals passing through a first lens group and a second lens group into electrical signals.

[0068] According to the first aspect, the optical imaging system can be configured such that the second lens group is movable in the optical axis direction. For example, if desired, the second lens group can be configured to move in a direction away from the first lens group (i.e., the imaging plane direction).

[0069] The optical imaging system according to the first aspect can achieve macroscopic photography by changing the position of the second lens group. As an example, the optical imaging system according to the first aspect can capture images of objects located at long or intermediate distances when the second lens group is positioned closest to the first lens group, and can capture images of objects at extremely close distances when the second lens group is positioned furthest from the first lens group. More specifically, the optical imaging system according to the first aspect can achieve macroscopic photography by moving the second lens group by a substantially insignificant distance (within 20% of the TTL).

[0070] The optical imaging system according to the first aspect may include six lenses. For example, in the optical imaging system according to the first aspect, the sum of the number of lenses constituting the first lens group and the number of lenses constituting the second lens group may be six. Specifically, the first lens group may include a first lens, a second lens, and a third lens arranged sequentially from the object side, and the second lens group may include a fourth lens, a fifth lens, and a sixth lens arranged sequentially from the object side. However, the number of lenses constituting the first lens group and the number of lenses constituting the second lens group are not limited to three. For example, the first lens group may include a first lens, a second lens, a third lens, and a fourth lens arranged sequentially from the object side, and the second lens group may include a fifth lens and a sixth lens arranged sequentially from the object side.

[0071] In the optical imaging system according to the first aspect, the first lens group may include one or more lenses having positive refractive power and one or more lenses having negative refractive power. For example, the first lens, the second lens, and the third lens constituting the first lens group may have positive refractive power, negative refractive power, and positive refractive power, respectively.

[0072] In the optical imaging system according to the first aspect, the second lens group may include two or more lenses having negative refractive power. For example, two or more of the fourth, fifth, and sixth lenses constituting the second lens group may have negative refractive power.

[0073] According to the first aspect, the optical imaging system can satisfy a predetermined conditional expression. For example, according to the first aspect, the optical imaging system can satisfy the following conditional expression with respect to the distance (TTL) from the object side of the first lens to the imaging plane and the focal length (f) of the optical imaging system.

[0074] 0.8 < TTL / f < 1.2

[0075] The optical imaging system according to the first aspect may also include characteristics other than those described above. For example, the optical imaging system according to the first aspect may satisfy one or more of the following conditional expressions.

[0076] 0.7 < |fG1 / fG2| < 1.4

[0077] 0.7 mm < Dm < 3.0 mm

[0078] 0.06 < Dm / TTL < 0.20

[0079] 0.15 < Dm / BFL < 0.60

[0080] 0.06 < Dm / f < 0.20

[0081] 0.50 < fM / f < 0.98

[0082] Here, fG1 is the focal length of the first lens group, fG2 is the focal length of the second lens group, Dm is the maximum variable distance of the second lens group, BFL is the distance from the image side of the last lens of the second lens group to the imaging plane, and fM is the focal length of the optical imaging system in the maximum variable state of the second lens group.

[0083] An optical imaging system according to a second aspect of this disclosure may include a plurality of lenses. For example, an optical imaging system according to the second aspect may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially from the object side.

[0084] The optical imaging system according to the second aspect of this disclosure may further include an image sensor configured to convert optical signals passed through the first to sixth lenses into electrical signals.

[0085] The optical imaging system according to the second aspect may include a lens with a specific shape. For example, the optical imaging system according to the second aspect may include a third lens that protrudes from its image side.

[0086] According to the second aspect, the optical imaging system can satisfy specific conditional expressions. For example, according to the second aspect, the optical imaging system can satisfy all of the following conditional expressions.

[0087] 0.8 < TTL / f < 1.2

[0088] 0.32 < f3 / f < 0.82

[0089] -1.0 < R1 / R4 < 1.0

[0090] Here, f3 is the focal length of the third lens, R1 is the radius of curvature of the object side of the first lens, and R4 is the radius of curvature of the image side of the second lens.

[0091] The optical imaging system according to a third aspect of this disclosure can be configured to satisfy one or more of the following conditional expressions. As an example, the optical imaging system according to the third aspect may include six lenses, for example, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially from the object side, and may satisfy two or more of the following conditional expressions. As another example, the optical imaging system according to the third aspect may include six lenses, for example, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially from the object side, and may be configured to satisfy all of the following conditional expressions.

[0092] 4.0 < TTL / IMG HT < 7.0

[0093] 0.23 < BFL / f < 0.46

[0094] 0.50 < f1 / f < 1.20

[0095] -5.0 < f² / f < 2.0

[0096] -2.0 < f3 / f < 1.0

[0097] 0.4 < f5 / f < 2.0

[0098] -1.2 < f6 / f < -0.20

[0099] -4.0 < (R1+R2) / (R1-R2) < -0.60

[0100] -8.0 < (R1+R4) / (R1-R4) < -0.10

[0101] Here, IMG HT is the height of the imaging plane, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, and R2 is the radius of curvature of the image side of the first lens.

[0102] The optical imaging system according to this disclosure may include one or more lenses having the following characteristics. As an example, the optical imaging system according to the first aspect may include one of a first lens to a sixth lens having the following characteristics. As another example, the optical imaging system according to the second and third aspects may include one or more of a first lens to a sixth lens having the following characteristics. However, the optical imaging system according to the above aspects does not necessarily include lenses having the following characteristics. The characteristics of the first lens to the sixth lens will be described below.

[0103] The first lens may have refractive power. For example, the first lens may have positive refractive power. One surface of the first lens may be convex. For example, the object-side surface of the first lens may be convex. The first lens may have a spherical surface or an aspherical surface. As an example, both surfaces of the first lens may be aspherical. The first lens may be formed of a material with high light transmittance and excellent processability. For example, the first lens may be formed of plastic or glass. The first lens may have a predetermined refractive index. As an example, the refractive index of the first lens may be less than 1.6. As a specific example, the refractive index of the first lens may be greater than 1.50 and less than 1.60. The first lens may have a predetermined Abbe number. As an example, the Abbe number of the first lens may be 50 or greater. As a specific example, the Abbe number of the first lens may be greater than 50 and less than 60.

[0104] The second lens may have refractive power. For example, the second lens may have positive or negative refractive power. One surface of the second lens may be concave. As an example, the object-side surface of the second lens may be concave. As an example, the image-side surface of the second lens may be concave. The second lens may have a spherical or aspherical surface. As an example, both surfaces of the second lens may be aspherical. The second lens may be formed of a material with high light transmittance and excellent processability. For example, the second lens may be formed of plastic or glass. The second lens may have a predetermined refractive index. As an example, the refractive index of the second lens may be 1.5 or greater. As a specific example, the refractive index of the second lens may be greater than 1.50 and less than 1.70. The second lens may have a predetermined Abbe number. For example, the Abbe number of the second lens may be 20 or greater. As a specific example, the Abbe number of the second lens may be greater than 20 and less than 60.

[0105] The third lens may have refractive power. For example, the third lens may have positive refractive power. One surface of the third lens may be convex. For example, the image-side surface of the third lens may be convex. The third lens may have a spherical or aspherical surface. As an example, both surfaces of the third lens may be aspherical. The third lens may be formed of a material with high light transmittance and excellent processability. For example, the third lens may be formed of plastic or glass. The third lens may have a predetermined refractive index. As an example, the refractive index of the third lens may be 1.5 or greater. As a specific example, the refractive index of the third lens may be greater than 1.50 and less than 1.60. The third lens may have a predetermined Abbe number. As an example, the Abbe number of the third lens may be 50 or greater. As a specific example, the Abbe number of the third lens may be greater than 50 and less than 60.

[0106] The fourth lens may have refractive power. For example, the fourth lens may have positive or negative refractive power. The fourth lens may have a spherical or aspherical surface. As an example, both surfaces of the fourth lens may be aspherical. As another example, both surfaces of the fourth lens may be spherical. The fourth lens may be formed from a material with high light transmittance and excellent processability. For example, the fourth lens may be formed from plastic or glass. The fourth lens may have a predetermined refractive index. As an example, the refractive index of the fourth lens may be 1.5 or greater. As a specific example, the refractive index of the fourth lens may be greater than 1.50 and less than 1.90. The fourth lens may have a predetermined Abbe number. As an example, the Abbe number of the fourth lens may be 15 or greater. As a specific example, the Abbe number of the fourth lens may be greater than 15 and less than 40.

[0107] The fifth lens may have refractive power. For example, the fifth lens may have positive or negative refractive power. One surface of the fifth lens may be convex. For example, the image-side surface of the fifth lens may be convex. However, the image-side surface of the fifth lens is not necessarily limited to being convex. The fifth lens may have a spherical or aspherical surface. As an example, both surfaces of the fifth lens may be aspherical. The fifth lens may be formed of a material with high light transmittance and excellent processability. For example, the fifth lens may be formed of plastic or glass. The fifth lens may have a predetermined refractive index. As an example, the refractive index of the fifth lens may be 1.5 or greater. As a specific example, the refractive index of the fifth lens may be greater than 1.50 and less than 1.70. The fifth lens may have a predetermined Abbe number. As an example, the Abbe number of the fifth lens may be 15 or greater. As a specific example, the Abbe number of the fifth lens may be greater than 15 and less than 40.

[0108] The sixth lens may have refractive power. For example, the sixth lens may have positive refractive power. One surface of the sixth lens may be concave. As an example, the object-side surface of the sixth lens may be concave. As an example, the image-side surface of the sixth lens may be concave. The sixth lens may have a spherical or aspherical surface. As an example, both surfaces of the sixth lens may be aspherical. The sixth lens may be formed of a material with high light transmittance and excellent processability. For example, the sixth lens may be formed of plastic or glass. The sixth lens may have a predetermined refractive index. As an example, the refractive index of the sixth lens may be 1.5 or greater. As a specific example, the refractive index of the sixth lens may be greater than 1.50 and less than 1.70. The sixth lens may have a predetermined Abbe number. As an example, the Abbe number of the sixth lens may be 20 or greater. As a specific example, the Abbe number of the sixth lens may be greater than 20 and less than 60.

[0109] As described above, the first to sixth lenses can have spherical or aspherical surfaces. When the first to sixth lenses have aspherical surfaces, these aspherical surfaces can be represented by the following Equation 1: Equation 1

[0110] Here, c is the reciprocal of the radius of curvature of the lens, k is the quadratic constant, r is the distance from a point on the aspherical surface of the lens to the optical axis, A to H and J are aspherical constants, and Z (or SAG) is the distance between a point on the aspherical surface of the lens at a distance r and the tangent plane that intersects with the vertex of the aspherical surface of the lens.

[0111] The optical imaging system according to the exemplary embodiments described above or the aspects described above may further include a filter. For example, the optical imaging system may include a filter disposed between the sixth lens and the imaging plane. The filter may be configured to block light of a specific wavelength. For example, the filter may be configured to block infrared light.

[0112] Next, an optical imaging system according to an exemplary embodiment will be described with reference to the accompanying drawings.

[0113] First, refer to Figure 1 An optical imaging system according to a first exemplary embodiment is described.

[0114] The optical imaging system 100 according to a first exemplary embodiment may include a first lens group LG1 and a second lens group LG2. The first lens group LG1 may include a first lens 110, a second lens 120, and a third lens 130, and the second lens group LG2 may include a fourth lens 140, a fifth lens 150, and a sixth lens 160. The first lens group LG1 may be configured such that its position relative to the imaging surface IP remains unchanged, but the second lens group LG2 may be configured such that its position relative to the imaging surface IP can be changed. For example, when the second lens group LG2 is positioned close to the first lens group LG1, the second lens group LG2 may move toward the imaging surface IP, which can enable close-up or macro photography by the optical imaging system 100.

[0115] The first lens 110 can have positive refractive power, and its object-side surface can be convex while its image-side surface can be concave. The second lens 120 can have negative refractive power, and its object-side surface can be convex while its image-side surface can be concave. The third lens 130 can have positive refractive power, and both its object-side surface and image-side surface can be convex. The fourth lens 140 can have negative refractive power, and both its object-side surface and image-side surface can be concave. The fifth lens 150 can have positive refractive power, and both its object-side surface and image-side surface can be convex. The sixth lens 160 can have negative refractive power, and both its object-side surface and image-side surface can be convex. A curvature point can be formed on the image-side surface of the sixth lens 160.

[0116] The optical imaging system 100 may further include a filter IF and an imaging surface IP. The filter IF may be disposed between the sixth lens 160 and the imaging surface IP. The imaging surface IP may be formed at the location where the light incident from the first lens 110 to the sixth lens 160 forms an image. For example, the imaging surface IP may be formed on a surface of the image sensor IS of the camera module, or it may be formed within the image sensor IS.

[0117] exist Figure 2 The diagram shows graphs with curves representing the aberration characteristics of the optical imaging system according to this exemplary embodiment. Tables 1 and 2 show the characteristics of the lens and aspherical values ​​of the optical imaging system according to this exemplary embodiment.

[0118] Table 1

[0119] Table 2

[0120] Reference Figure 3 An optical imaging system according to a second exemplary embodiment is described.

[0121] The optical imaging system 200 according to the second exemplary embodiment may include a first lens group LG1 and a second lens group LG2. The first lens group LG1 may include a first lens 210, a second lens 220, a third lens 230, and a fourth lens 240, and the second lens group LG2 may include a fifth lens 250 and a sixth lens 260. The first lens group LG1 may be configured such that its position relative to the imaging surface IP remains unchanged, but the second lens group LG2 may be configured such that its position relative to the imaging surface IP can be changed. For example, when the second lens group LG2 is positioned close to the first lens group LG1, the second lens group LG2 may move toward the imaging surface IP, which can enable close-up or macro photography by the optical imaging system 200.

[0122] The first lens 210 can have positive refractive power, and its object-side surface can be convex while its image-side surface can be concave. The second lens 220 can have negative refractive power, and its object-side surface can be concave while its image-side surface can be convex. The third lens 230 can have positive refractive power, and both its object-side surface and image-side surface can be convex. The fourth lens 240 can have negative refractive power, and both its object-side surface and image-side surface can be concave. The fifth lens 250 can have positive refractive power, and both its object-side surface and image-side surface can be concave. The sixth lens 260 can have negative refractive power, and both its object-side surface and image-side surface can be concave.

[0123] The optical imaging system 200 may also include a filter IF and an imaging surface IP. The filter IF may be disposed between the sixth lens 260 and the imaging surface IP. The imaging surface IP may be formed at the location where the light incident from the first lens 210 to the sixth lens 260 forms an image. For example, the imaging surface IP may be formed on a surface of the image sensor IS of the camera module, or it may be formed within the image sensor IS.

[0124] exist Figure 4 The figure shows a graph with curves representing the aberration characteristics of the optical imaging system according to this exemplary embodiment. Tables 3 and 4 show the characteristics of the lens and aspherical values ​​of the optical imaging system according to this exemplary embodiment.

[0125] Table 3

[0126] Table 4

[0127] Reference Figure 5 An optical imaging system according to a third exemplary embodiment is described.

[0128] The optical imaging system 300 according to a third exemplary embodiment may include a first lens group LG1 and a second lens group LG2. The first lens group LG1 may include a first lens 310, a second lens 320, a third lens 330, and a fourth lens 340, and the second lens group LG2 may include a fifth lens 350 and a sixth lens 360. The first lens group LG1 may be configured such that its position relative to the imaging surface IP remains unchanged, but the second lens group LG2 may be configured such that its position relative to the imaging surface IP can be changed. For example, when the second lens group LG2 is positioned close to the first lens group LG1, the second lens group LG2 may move toward the imaging surface IP, which can enable close-up or macro photography by the optical imaging system 300.

[0129] The first lens 310 can have positive refractive power, and its object-side surface can be convex while its image-side surface can be concave. The second lens 320 can have negative refractive power, and its object-side surface can be convex while its image-side surface can be concave. The third lens 330 can have positive refractive power, and both its object-side surface and image-side surface can be convex. The fourth lens 340 can have negative refractive power, and both its object-side surface and image-side surface can be concave. The fifth lens 350 can have positive refractive power, and both its object-side surface and image-side surface can be concave. The sixth lens 360 can have negative refractive power, and both its object-side surface and image-side surface can be concave. A curvature point can be formed on the image-side surface of the sixth lens 360.

[0130] The optical imaging system 300 may further include a filter IF and an imaging surface IP. The filter IF may be disposed between the sixth lens 360 and the imaging surface IP. The imaging surface IP may be formed at the location where the light incident from the first lens 310 to the sixth lens 360 forms an image. For example, the imaging surface IP may be formed on a surface of the image sensor IS of the camera module, or formed within the image sensor IS.

[0131] exist Figure 6 The diagram shows graphs with curves representing the aberration characteristics of the optical imaging system according to this exemplary embodiment. Tables 5 and 6 show the lens characteristics and aspherical values ​​of the optical imaging system according to this exemplary embodiment.

[0132] Table 5

[0133] Table 6

[0134] Reference Figure 7An optical imaging system according to a fourth exemplary embodiment is described.

[0135] The optical imaging system 400 according to the fourth exemplary embodiment may include a first lens group LG1 and a second lens group LG2. The first lens group LG1 may include a first lens 410, a second lens 420, and a third lens 430, and the second lens group LG2 may include a fourth lens 440, a fifth lens 450, and a sixth lens 460. The first lens group LG1 may be configured such that its position relative to the imaging surface IP remains unchanged, but the second lens group LG2 may be configured such that its position relative to the imaging surface IP can be changed. For example, when the second lens group LG2 is positioned close to the first lens group LG1, the second lens group LG2 may move toward the imaging surface IP, which can enable close-up or macro photography by the optical imaging system 400.

[0136] The first lens 410 can have positive refractive power, and its object-side surface can be convex, and its image-side surface can be convex. The second lens 420 can have negative refractive power, and its object-side surface can be concave, and its image-side surface can be concave. The third lens 430 can have positive refractive power, and its object-side surface can be convex, and its image-side surface can be convex. The fourth lens 440 can have positive refractive power, and its object-side surface can be convex, and its image-side surface can be convex. The fifth lens 450 can have negative refractive power, and its object-side surface can be concave, and its image-side surface can be concave. The sixth lens 460 can have negative refractive power, and its object-side surface can be concave, and its image-side surface can be convex.

[0137] The optical imaging system 400 may also include a filter IF and an imaging surface IP. The filter IF may be disposed between the sixth lens 460 and the imaging surface IP. The imaging surface IP may be formed at the location where the light incident from the first lens 410 to the sixth lens 460 forms an image. For example, the imaging surface IP may be formed on a surface of the image sensor IS of the camera module, or it may be formed within the image sensor IS.

[0138] exist Figure 8 The diagram shows graphs with curves representing the aberration characteristics of the optical imaging system according to this exemplary embodiment. Tables 7 and 8 show the characteristics of the lens and aspherical values ​​of the optical imaging system according to this exemplary embodiment.

[0139] Table 7

[0140] Table 8

[0141] Reference Figure 9An optical imaging system according to a fifth exemplary embodiment is described.

[0142] The optical imaging system 500 according to the fifth exemplary embodiment may include a first lens group LG1 and a second lens group LG2. The first lens group LG1 may include a first lens 510, a second lens 520, a third lens 530, and a fourth lens 540, and the second lens group LG2 may include a fifth lens 550 and a sixth lens 560. The first lens group LG1 may be configured such that its position relative to the imaging surface IP remains unchanged, but the second lens group LG2 may be configured such that its position relative to the imaging surface IP can be changed. For example, when the second lens group LG2 is positioned close to the first lens group LG1, the second lens group LG2 may move toward the imaging surface IP, which can enable close-up or macro photography by the optical imaging system 500.

[0143] The first lens 510 can have positive refractive power, and its object-side surface can be convex while its image-side surface can be concave. The second lens 520 can have positive refractive power, and its object-side surface can be convex while its image-side surface can be concave. The third lens 530 can have positive refractive power, and both its object-side surface and image-side surface can be convex. The fourth lens 540 can have negative refractive power, and both its object-side surface and image-side surface can be concave. The fifth lens 550 can have positive refractive power, and both its object-side surface and image-side surface can be convex while its image-side surface can be concave. The sixth lens 560 can have positive refractive power, and both its object-side surface and image-side surface can be convex while its image-side surface can be concave.

[0144] The optical imaging system 500 may also include a filter IF and an imaging surface IP. The filter IF may be disposed between the sixth lens 560 and the imaging surface IP. The imaging surface IP may be formed at the location where the light incident from the first lens 510 to the sixth lens 560 forms an image. For example, the imaging surface IP may be formed on a surface of the image sensor IS of the camera module, or it may be formed within the image sensor IS.

[0145] exist Figure 10 The diagram shows graphs with curves representing the aberration characteristics of the optical imaging system according to this exemplary embodiment. Tables 9 and 10 show the characteristics of the lens and aspherical values ​​of the optical imaging system according to this exemplary embodiment.

[0146] Table 9

[0147] Table 10

[0148] Reference Figure 11An optical imaging system according to a sixth exemplary embodiment is described.

[0149] The optical imaging system 600 according to the sixth exemplary embodiment may include a first lens group LG1 and a second lens group LG2. The first lens group LG1 may include a first lens 610, a second lens 620, and a third lens 630, and the second lens group LG2 may include a fourth lens 640, a fifth lens 650, and a sixth lens 660. The first lens group LG1 may be configured such that its position relative to the imaging surface IP remains unchanged, but the second lens group LG2 may be configured such that its position relative to the imaging surface IP can be changed. For example, when the second lens group LG2 is positioned close to the first lens group LG1, the second lens group LG2 may move toward the imaging surface IP, which can enable close-up or macro photography by the optical imaging system 600.

[0150] The first lens 610 can have positive refractive power, and its object-side surface can be convex while its image-side surface can be concave. The second lens 620 can have negative refractive power, and its object-side surface can be concave while its image-side surface can be convex. The third lens 630 can have positive refractive power, and its object-side surface can be concave while its image-side surface can be convex. The fourth lens 640 can have negative refractive power, and its object-side surface can be convex while its image-side surface can be concave. The fifth lens 650 can have positive refractive power, and its object-side surface can be convex while its image-side surface can be convex. The sixth lens 660 can have negative refractive power, and its object-side surface can be concave while its image-side surface can be concave. A curvature point can be formed on the image-side surface of the sixth lens 660.

[0151] The optical imaging system 600 may further include a filter IF and an imaging surface IP. The filter IF may be disposed between the sixth lens 660 and the imaging surface IP. The imaging surface IP may be formed at the location where the light incident from the first lens 610 to the sixth lens 660 forms an image. For example, the imaging surface IP may be formed on a surface of the image sensor IS of the camera module, or it may be formed within the image sensor IS.

[0152] exist Figure 12 The diagram shows graphs with curves representing the aberration characteristics of the optical imaging system according to this exemplary embodiment. Tables 11 and 12 show the characteristics of the lens and aspherical values ​​of the optical imaging system according to this exemplary embodiment.

[0153] Table 11

[0154] Table 12

[0155] Reference Figure 13 An optical imaging system according to a seventh exemplary embodiment is described.

[0156] The optical imaging system 700 according to the seventh exemplary embodiment may include a first lens group LG1 and a second lens group LG2. The first lens group LG1 may include a first lens 710, a second lens 720, a third lens 730, and a fourth lens 740, and the second lens group LG2 may include a fifth lens 750 and a sixth lens 760. The first lens group LG1 may be configured such that its position relative to the imaging surface IP remains unchanged, but the second lens group LG2 may be configured such that its position relative to the imaging surface IP can be changed. For example, when the second lens group LG2 is positioned close to the first lens group LG1, the second lens group LG2 may be moved toward the imaging surface IP, which can enable close-up or macro photography by the optical imaging system 700.

[0157] The first lens 710 can have positive refractive power, and its object-side surface can be convex while its image-side surface can be concave. The second lens 720 can have negative refractive power, and its object-side surface can be convex while its image-side surface can be concave. The third lens 730 can have positive refractive power, and both its object-side surface and image-side surface can be convex. The fourth lens 740 can have negative refractive power, and both its object-side surface and image-side surface can be concave. The fifth lens 750 can have positive refractive power, and both its object-side surface and image-side surface can be concave. The sixth lens 760 can have negative refractive power, and both its object-side surface and image-side surface can be concave. A curvature point can be formed on the image-side surface of the sixth lens 760.

[0158] The optical imaging system 700 may further include a filter IF and an imaging surface IP. The filter IF may be disposed between the sixth lens 760 and the imaging surface IP. The imaging surface IP may be formed at the location where the light incident from the first lens 710 to the sixth lens 760 forms an image. For example, the imaging surface IP may be formed on a surface of the image sensor IS of the camera module, or formed within the image sensor IS.

[0159] exist Figure 14 The figure shows a graph with curves representing the aberration characteristics of the optical imaging system according to this exemplary embodiment. Tables 13 and 14 show the characteristics of the lens and aspherical values ​​of the optical imaging system according to this exemplary embodiment.

[0160] Table 13

[0161] Table 14

[0162] Reference Figure 15 An optical imaging system according to an eighth exemplary embodiment is described.

[0163] The optical imaging system 800 according to the eighth exemplary embodiment may include a first lens group LG1 and a second lens group LG2. The first lens group LG1 may include a first lens 810, a second lens 820, and a third lens 830, and the second lens group LG2 may include a fourth lens 840, a fifth lens 850, and a sixth lens 860. The first lens group LG1 may be configured such that its position relative to the imaging surface IP remains unchanged, but the second lens group LG2 may be configured such that its position relative to the imaging surface IP can be changed. For example, when the second lens group LG2 is positioned close to the first lens group LG1, the second lens group LG2 may move toward the imaging surface IP, which can enable close-up or macro photography by the optical imaging system 800.

[0164] The first lens 810 can have positive refractive power, and its object-side surface can be convex while its image-side surface can be concave. The second lens 820 can have negative refractive power, and its object-side surface can be convex while its image-side surface can be concave. The third lens 830 can have positive refractive power, and its object-side surface can be concave while its image-side surface can be convex. The fourth lens 840 can have negative refractive power, and its object-side surface can be convex while its image-side surface can be concave. The fifth lens 850 can have positive refractive power, and its object-side surface can be convex while its image-side surface can be convex. The sixth lens 860 can have negative refractive power, and its object-side surface can be concave while its image-side surface can be concave. A curvature point can be formed on the image-side surface of the sixth lens 860.

[0165] The optical imaging system 800 may also include a filter IF and an imaging surface IP. The filter IF may be disposed between the sixth lens 860 and the imaging surface IP. The imaging surface IP may be formed at the location where the light incident from the first lens 810 to the sixth lens 860 forms an image. For example, the imaging surface IP may be formed on a surface of the image sensor IS of the camera module, or it may be formed within the image sensor IS.

[0166] exist Figure 16 The diagram shows graphs with curves representing the aberration characteristics of the optical imaging system according to this exemplary embodiment. Tables 15 and 16 show the characteristics of the lens and aspherical values ​​of the optical imaging system according to this exemplary embodiment.

[0167] Table 15

[0168] Table 16

[0169] Reference Figure 17 An optical imaging system according to a ninth exemplary embodiment is described.

[0170] The optical imaging system 900 according to the ninth exemplary embodiment may include a first lens group LG1 and a second lens group LG2. The first lens group LG1 may include a first lens 910, a second lens 920, a third lens 930, and a fourth lens 940, and the second lens group LG2 may include a fifth lens 950 and a sixth lens 960. The first lens group LG1 may be configured such that its position relative to the imaging surface IP remains unchanged, but the second lens group LG2 may be configured such that its position relative to the imaging surface IP can be changed. For example, when the second lens group LG2 is positioned close to the first lens group LG1, the second lens group LG2 may move toward the imaging surface IP, which can enable close-up or macro photography by the optical imaging system 900.

[0171] The first lens 910 can have positive refractive power, and its object-side surface can be convex while its image-side surface can be concave. The second lens 920 can have positive refractive power, and both its object-side surface and image-side surface can be convex. The third lens 930 can have positive refractive power, and both its object-side surface and image-side surface can be concave. The fourth lens 940 can have negative refractive power, and both its object-side surface and image-side surface can be concave. The fifth lens 950 can have positive refractive power, and both its object-side surface and image-side surface can be convex. The sixth lens 960 can have negative refractive power, and both its object-side surface and image-side surface can be concave. A curvature point can be formed on the image-side surface of the sixth lens 960.

[0172] The optical imaging system 900 may also include a filter IF and an imaging surface IP. The filter IF may be disposed between the sixth lens 960 and the imaging surface IP. The imaging surface IP may be formed at the location where the light incident from the first lens 910 to the sixth lens 960 forms an image. For example, the imaging surface IP may be formed on a surface of the image sensor IS of the camera module, or it may be formed within the image sensor IS.

[0173] exist Figure 18 The diagram shows graphs with curves representing the aberration characteristics of the optical imaging system according to this exemplary embodiment. Tables 17 and 18 show the characteristics of the lens and aspherical values ​​of the optical imaging system according to this exemplary embodiment.

[0174] Table 17

[0175] Table 18

[0176] The optical imaging systems 100, 200, 300, 400, 500, 600, 700, 800, and 900 according to the first to ninth exemplary embodiments described above can be configured for easy mounting in thin electronic devices. For example, the optical imaging systems 100, 200, 300, 400, 500, 600, 700, 800, and 900 may include one or more optical path conversion units PR for converting optical paths, so as to be disposed in the longitudinal direction of the thin electronic device. Figure 19 As shown, the optical path conversion unit PR can be disposed on the object side of the first lens group LG1. However, the position of the optical path conversion unit PR is not limited to the object side of the first lens group LG1. For example, the optical path conversion unit PR can also be disposed between the first lens group LG1 and the second lens group LG2, or disposed after the second lens group LG2.

[0177] Tables 19 and 20 show the values ​​of optical characteristic values ​​and conditional expressions of the optical imaging systems according to the first exemplary embodiment to the ninth exemplary embodiment.

[0178] Table 19

[0179] Table 20

[0180] As described above, the optical imaging system according to exemplary embodiments of the present disclosure can capture images of objects located at long or intermediate distances and objects located at extremely close distances.

[0181] While specific examples have been shown and described above, it will be apparent upon understanding this disclosure 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 herein are to be understood in a descriptive sense only and not for limiting purposes. The description of features or aspects in each example should be considered applicable to similar features or aspects in other examples. Suitable results may still be achieved if the described techniques are performed in a different order, and / or if components in the described system, architecture, device, or circuit are combined in different ways and / or replaced or supplemented by other components or their equivalents. Therefore, the scope of this disclosure is not limited by the specific embodiments but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents should be understood to be included in this disclosure.

Claims

1. An optical imaging system, including: The first lens has positive refractive power and a convex object-side surface; The second lens has refractive power; The third lens has positive refractive power; The fourth lens has refractive power; The fifth lens has refractive power; as well as The sixth lens has refractive power; The first lens to the sixth lens are arranged sequentially from the object side. The optical imaging system has a total of six lenses, and Wherein, 0.32 < f3 / f < 0.82, where f is the focal length of the optical imaging system and f3 is the focal length of the third lens.

2. The optical imaging system according to claim 1, wherein, The second lens has a convex object-side surface.

3. The optical imaging system according to claim 1, wherein, The third lens has a convex image-side surface.

4. The optical imaging system according to claim 1, wherein, The fourth lens has a concave object-side surface.

5. The optical imaging system according to claim 1, wherein, The fifth lens has a convex image-side surface.

6. The optical imaging system according to claim 1, wherein, The sixth lens has a concave image-side surface.

7. An optical imaging system, including: The first lens has positive refractive power and a convex object-side surface; The second lens has refractive power; The third lens has positive refractive power; The fourth lens has refractive power; The fifth lens has refractive power; as well as The sixth lens has refractive power; The first lens to the sixth lens are arranged sequentially from the object side. The optical imaging system has a total of six lenses. Wherein, 0.23 < BFL / f < 0.46 and -4.0 < (R1+R2) / (R1-R2) < -0.60, where f is the focal length of the optical imaging system, BFL is the distance from the image side of the sixth lens to the imaging plane, R1 is the radius of curvature of the object side of the first lens, and R2 is the radius of curvature of the image side of the first lens.

8. The optical imaging system according to claim 7, wherein, The second lens has a convex object-side surface.

9. The optical imaging system according to claim 7, wherein, The third lens has a convex object-side surface.

10. The optical imaging system according to claim 7, wherein, The fourth lens has a concave image-side surface.

11. The optical imaging system according to claim 7, wherein, The fifth lens has a convex image-side surface.

12. The optical imaging system according to claim 7, wherein, The sixth lens has a concave image-side surface.

Images