WO2022124856A1 - 광학계 및 이를 포함하는 카메라 모듈 - Google Patents
광학계 및 이를 포함하는 카메라 모듈 Download PDFInfo
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- WO2022124856A1 WO2022124856A1 PCT/KR2021/018768 KR2021018768W WO2022124856A1 WO 2022124856 A1 WO2022124856 A1 WO 2022124856A1 KR 2021018768 W KR2021018768 W KR 2021018768W WO 2022124856 A1 WO2022124856 A1 WO 2022124856A1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/02—Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0087—Simple or compound lenses with index gradient
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
- G02B9/60—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having five components only
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
- G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B2003/0093—Simple or compound lenses characterised by the shape
Definitions
- An embodiment relates to an optical system for improved optical performance and a camera module including the same.
- the camera module captures an object and stores it as an image or video, and is installed in various applications.
- the camera module is produced in a very small size and is applied to not only portable devices such as smartphones, tablet PCs, and laptops, but also drones and vehicles to provide various functions.
- the optical system of the camera module may include an imaging lens that forms an image and an image sensor that converts the formed image into an electrical signal.
- the camera module may perform an autofocus (AF) function of aligning the focal lengths of the lenses by automatically adjusting the distance between the image sensor and the imaging lens, and a distant object through a zoom lens It is possible to perform a zooming function of zooming up or zooming out by increasing or decreasing the magnification of .
- AF autofocus
- the camera module employs an image stabilization (IS) technology to correct or prevent image stabilization due to an unstable fixing device or a camera movement caused by a user's movement.
- the most important element for this camera module to obtain an image is an imaging lens that forms an image.
- Recently, interest in high performance such as high image quality and high resolution is increasing, and research on an optical system including a plurality of lenses is being conducted in order to realize this. For example, research using a plurality of imaging lenses having positive (+) or negative (-) refractive power to implement a high-performance optical system is being conducted.
- the entire optical system may increase, and it is difficult to derive excellent optical and aberration characteristics.
- an optical system including a plurality of lenses may have a set effective focal length (EFL).
- EFL effective focal length
- the lens closest to the object side has a large aperture or has the largest aperture among the plurality of lenses. Accordingly, since the lens closest to the object side has a relatively large size, it is difficult to miniaturize the optical system.
- An optical system including a plurality of lenses may have a relatively high height. For example, as the number of lenses increases, the distance from the image sensor to the object surface of the lens closest to the object may increase. Accordingly, the overall thickness of a device such as a smart phone in which the optical system is disposed may increase, and there is a problem in that it is difficult to downsize. Therefore, a new optical system capable of solving the above problems is required.
- the embodiment is intended to provide an optical system with improved optical properties.
- the embodiment is to provide an optical system that can be implemented in a small and compact (compact).
- the embodiment is intended to provide an optical system applicable to a folded (folded) camera having a thin thickness.
- An optical system includes first to fifth lenses sequentially arranged along an optical axis from an object side to an image side, the first lens having a positive refractive power, and the second lens having a positive refractive power and, each of the first to fifth lenses includes an object side surface and an image side surface, and at least one of an image side surface of the first lens, an object side surface and an image side surface of the second to fifth lenses
- the surface may have a larger clear aperture size than the object-side surface of the first lens.
- the size of the effective diameter of the image-side surface of the first lens may be larger than the size of the effective diameter of the object-side surface of the first lens.
- An object-side surface of the first lens may be concave.
- the first lens may satisfy Equation 1 below.
- L1S1_CA means the size of the clear aperture (CA) of the object side of the first lens
- L1S2_CA means the size of the effective aperture (CA) of the image side of the first lens. do.
- the effective focal length of the optical system may satisfy Equation 2 below.
- Equation 2 means an effective focal length of the optical system.
- the first and second lenses may satisfy Equation 3 below.
- L1_CT denotes a central thickness of the first lens
- L2_CT denotes a central thickness of the second lens
- the F-number of the optical system may be less than 3.
- the display may further include an optical path changing member disposed between the object and the first to fifth lenses, wherein the optical path changing member includes: The path may be changed in a second direction that is an arrangement direction of the first to fifth lenses.
- An optical system includes first to fifth lenses sequentially arranged along an optical axis from an object side to an image side, the first lens having a positive refractive power, and the second lens having a positive refractive power Having refractive power, the first lens may have a meniscus shape convex toward the image, an object side of the second lens may be convex, and at least one of the first to fifth lenses may have a non-circular shape. .
- each of the first to fifth lenses includes an object side surface and an image side surface, and an image side surface of the first lens, and an object side surface and an image side surface of the second to fifth lenses At least one of the surfaces may have a larger clear aperture than the object-side surface of the first lens.
- the object side surface of the first lens may have a non-circular shape, and the following Equation 4 may be satisfied.
- L1S1_CA means the maximum size (clear aperture; CA) of the first lens
- L1S1_CH means the minimum size (clear height; CH) of the effective diameter of the first lens according to the non-circular shape. do.
- the image side surface of the first lens and the object side surface of the second lens may have a non-circular shape.
- the optical system and camera module according to the embodiment may have improved optical properties.
- the optical system may include a plurality of lenses and may include at least one lens surface having an effective diameter larger than an object-side surface of a first lens closest to the object. Accordingly, it is possible to have improved optical properties when designing an optical system including the plurality of lenses.
- the optical system and the camera module according to the embodiment may be provided in a slim form.
- a lens having a relatively large effective diameter, for example, a lens surface of at least one lens adjacent to the object side may have a non-circular shape, for example, a D-cut shape. Accordingly, the overall height of the optical system may be reduced, and a camera module and device including the optical system may be provided in a slimmer shape.
- the optical system according to the embodiment may change light incident in a direction perpendicular to a surface of a device or device to which it is applied, including the light path changing member, in a direction parallel to the surface of the device or device. Accordingly, the optical system including the plurality of lenses may have a thinner thickness in the device or device, and the overall thickness of the device or device may be thinner.
- FIG 1 and 2 are block diagrams of an optical system according to an embodiment.
- FIG 3 is a view for explaining a non-circular shape of the lenses of the optical system according to the embodiment.
- 4 to 7 are graphs illustrating an aberration diagram, a diffraction MTF characteristic, a chromatic aberration characteristic, and a coma aberration characteristic of an optical system according to an embodiment.
- FIG. 8 is a diagram illustrating that the camera module according to the embodiment is applied to a mobile terminal.
- first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the component from other components, and are not limited to the essence, order, or order of the component by the term. And, when it is described that a component is 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also with the component It may also include a case of 'connected', 'coupled' or 'connected' due to another element between the other elements.
- top (above) or under (below) When it is described as being formed or disposed on “above (above) or under (below)” of each component, top (above) or under (below) is not only when two components are in direct contact with each other, but also when one or more or Also includes cases where another component is formed or disposed between two components.
- upper (upper) or lower (lower) when expressed as "upper (upper) or lower (lower)", a meaning of not only an upper direction but also a lower direction based on one component may be included.
- the convex surface of the lens may mean that the lens surface of the region corresponding to the optical axis has a convex shape
- the concave lens surface may mean that the lens surface of the region corresponding to the optical axis has a concave shape.
- "Object side” may mean a surface of the lens that faces the object side with respect to the optical axis
- "image side” may mean a surface of the lens that faces the imaging surface with respect to the optical axis.
- the vertical direction may mean a direction perpendicular to the optical axis
- the end of the lens or the lens surface may mean the end of the effective area of the lens through which the incident light passes.
- the central thickness of the lens may mean a length in the optical axis direction between the object side and the image side surface overlapping the optical axis in the lens.
- FIG. 1 and 2 are diagrams of an optical system according to an embodiment
- FIG. 3 is a diagram for explaining a non-circular shape lens among lenses of the optical system according to the embodiment.
- 4 to 7 are graphs illustrating an aberration diagram, a diffraction MTF characteristic, a chromatic aberration characteristic, and a coma aberration characteristic of an optical system according to an embodiment.
- the optical system 1000 may include a plurality of lenses 100 .
- the plurality of lenses 100 may include three or more lenses.
- the plurality of lenses 100 may include four or more lenses.
- the plurality of lenses 100 may include five or more lenses.
- the optical system 1000 includes a first lens 110 , a second lens 120 , a third lens 130 , a fourth lens 140 , a fifth lens 150 and It may include an image sensor 300 .
- the first to fifth lenses 110 , 120 , 130 , 140 , and 150 may be sequentially disposed along the optical axis OA of the optical system 1000 .
- the light corresponding to the object information passes through the first lens 110 , the second lens 120 , the third lens 130 , the fourth lens 140 , and the fifth lens 150 . It may be incident on the image sensor 300 .
- Each of the plurality of lenses 100 may include an effective area and an ineffective area.
- the effective area may be an area through which light incident on each of the first to fifth lenses 110 , 120 , 130 , 140 and 150 passes. That is, the effective region may be a region in which incident light is refracted to realize optical properties.
- the ineffective area may be disposed around the effective area.
- the ineffective area may be an area to which the light is not incident. That is, the ineffective region may be a region independent of the optical characteristic. Also, the ineffective region may be a region fixed to a barrel (not shown) for accommodating the lens.
- the image sensor 300 may detect light.
- the image sensor 300 may detect light sequentially passing through the plurality of lenses 100 , in detail, the first to fifth lenses 110 , 120 , 130 , 140 and 150 .
- the image sensor 300 may include a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).
- CMOS complementary metal oxide semiconductor
- the optical system 1000 according to the embodiment may further include a filter 500 .
- the filter 500 may be disposed between the plurality of lenses 100 and the image sensor 300 .
- the filter 500 may be disposed between the image sensor 300 and the last lens (the fifth lens 150 ) closest to the image sensor 300 among the plurality of lenses 100 .
- the filter 500 may include at least one of an infrared filter and an optical filter such as a cover glass.
- the filter 500 may pass light of a set wavelength band and filter light of a different wavelength band.
- the filter 500 includes an infrared filter, radiant heat emitted from external light may be blocked from being transmitted to the image sensor 300 .
- the filter 500 may transmit visible light and reflect infrared light.
- the optical system 1000 may include an aperture (not shown).
- the aperture may control the amount of light incident on the optical system 1000 .
- the aperture may be located in front of the first lens 110 or between two lenses selected from among the first to fifth lenses 110 , 120 , 130 , 140 and 150 .
- the aperture may be disposed between the second lens 120 and the third lens 130 .
- at least one of the first to fifth lenses 110 , 120 , 130 , 140 and 150 may function as an aperture.
- an object-side surface or an image-side surface of one lens selected from among the first to fifth lenses 110 , 120 , 130 , 140 and 150 may serve as an aperture for controlling the amount of light.
- the object-side surface (the fifth surface S5 ) of the third lens 130 may serve as an diaphragm.
- the optical system 1000 may further include a light path changing member (not shown).
- the light path changing member may change the path of the light by reflecting the light incident from the outside.
- the light path changing member may include a reflector and a prism.
- the light path changing member may include a right-angle prism.
- the light path changing member may change the path of the light by reflecting the path of the incident light at an angle of 90 degrees.
- the light path changing member may be disposed closer to the object side than the plurality of lenses 100 . That is, when the optical system 1000 includes the optical path changing member, the optical path changing member, the first lens 110 , the second lens 120 , and the third lens 130 are directed from the object side to the image side.
- the light path changing member may reflect light incident from the outside to change the path of the light in a set direction.
- a path of light incident to the light path changing member in a first direction is spaced apart in a second direction (a plurality of lenses 100 ) that is an arrangement direction of the plurality of lenses 100 . direction, the optical axis (OA) direction of FIGS. 1 and 2).
- the optical system 1000 may be applied to a folded camera capable of reducing the thickness of the camera.
- the optical system 1000 when the optical system 1000 includes the light path changing member, light incident in a direction perpendicular to the surface of the applied device may be changed in a direction parallel to the surface of the device. Accordingly, the optical system 1000 including the plurality of lenses may have a thinner thickness in the device, and thus the device may be provided thinner. In more detail, when the optical system 1000 does not include the light path changing member, the plurality of lenses 100 may be disposed to extend in a direction perpendicular to the surface of the device in the device. Accordingly, the optical system 1000 including the plurality of lenses 100 may have a high height in a direction perpendicular to the surface of the device, and it may be difficult to form a thin thickness of the device.
- the optical system 1000 when it includes the light path changing member, it may be applied to a folded camera, and the plurality of lenses may be arranged to extend in a direction parallel to the surface of the device. . That is, the optical system 1000 may be disposed such that the optical axis OA is parallel to the surface of the device. Accordingly, the optical system 1000 including the plurality of lenses may have a low height in a direction perpendicular to the surface of the device. Accordingly, the folded camera including the optical system 1000 may have a thin thickness in the device, and the thickness of the device may also be reduced.
- the optical system 1000 includes a first lens 110 , a second lens 120 , a third lens 130 , and a fourth lens sequentially arranged along the optical axis OA from the object side toward the image side or the sensor side. 140 , a fifth lens 150 , a filter 500 , and an image sensor 300 may be included.
- the first lens 110 may be disposed closest to the object side among the plurality of lenses 100
- the fifth lens 150 may be disposed closest to the image (image sensor 300 ) side. can be arranged.
- the first lens 110 may have positive (+) refractive power.
- the first lens 110 may include a plastic or glass material.
- the first lens 110 may be made of a plastic material.
- the first lens 110 may include a first surface S1 defined as an object side surface and a second surface S2 defined as an image side surface.
- the first surface S1 may be concave, and the second surface S2 may be convex. That is, the first lens 110 may have a meniscus shape convex in the image side direction.
- the upper side may be a sensor side, and the upper side may be a sensor side.
- At least one of the first surface S1 and the second surface S2 may be an aspherical surface.
- both the first surface S1 and the second surface S2 may be aspherical.
- the second lens 120 may have positive (+) refractive power.
- the second lens 120 may include a plastic or glass material.
- the second lens 120 may be made of a plastic material.
- the second lens 120 may include a third surface S3 defined as an object side surface and a fourth surface S4 defined as an image side surface.
- the third surface S3 may be convex
- the fourth surface S4 may be concave. That is, the second lens 120 may have a meniscus shape convex toward the object.
- At least one of the third surface S3 and the fourth surface S4 may be an aspherical surface.
- both the third surface S3 and the fourth surface S4 may be aspherical.
- the third lens 130 may have negative (-) refractive power.
- the third lens 130 may include a plastic or glass material.
- the third lens 130 may be made of a plastic material.
- the third lens 130 may include a fifth surface S5 defined as an object side surface and a sixth surface S6 defined as an image side surface.
- the fifth surface S5 may be concave
- the sixth surface S6 may be concave. That is, the third lens 130 may have a shape in which both surfaces are concave.
- At least one of the fifth surface S5 and the sixth surface S6 may be an aspherical surface.
- both the fifth surface S5 and the sixth surface S6 may be aspherical.
- the third lens 130 may include at least one inflection point.
- the fifth surface S5 and the sixth surface S6 may include an inflection point.
- the fifth surface S5 may include a first inflection point (not shown) defined as an inflection point.
- the first inflection point may be disposed at a position less than or equal to about 40% when the optical axis OA as a starting point and the end of the fifth surface S5 of the third lens 130 as an end point.
- the first inflection point is disposed at a position of about 10% to about 40% when the optical axis OA is the starting point and the tip of the fifth surface S5 of the third lens 130 is the endpoint.
- the first inflection point is at a position of about 15% to about 35% when the optical axis OA is the starting point and the tip of the fifth surface S5 of the third lens 130 is the endpoint.
- the end of the fifth surface S5 may mean the end of the effective area of the fifth surface S5 of the third lens 130
- the position of the first inflection point is the optical axis OA. It may be a position set based on a vertical direction of .
- the fourth lens 140 may have negative (-) refractive power.
- the fourth lens 140 may include a plastic or glass material.
- the fourth lens 140 may be made of a plastic material.
- the fourth lens 140 may include a seventh surface S7 defined as an object side surface and an eighth surface S8 defined as an image side surface.
- the seventh surface S7 may be convex, and the eighth surface S8 may be concave. That is, the fourth lens 140 may have a meniscus shape convex toward the object.
- At least one of the seventh surface S7 and the eighth surface S8 may be an aspherical surface.
- both the seventh surface S7 and the eighth surface S8 may be aspherical.
- the fifth lens 150 may have positive (+) refractive power.
- the fifth lens 150 may include a plastic or glass material.
- the fifth lens 150 may be made of a plastic material.
- the fifth lens 150 may include a ninth surface S9 defined as an object side surface and a tenth surface S10 defined as an image side surface.
- the ninth surface S9 may be convex, and the tenth surface S10 may be concave. That is, the fifth lens 150 may have a meniscus shape convex toward the object.
- At least one of the ninth surface S9 and the tenth surface S10 may be an aspherical surface.
- both the ninth surface S9 and the tenth surface S10 may be aspherical.
- the optical system 1000 may include an aperture (not shown).
- the aperture may be disposed between the object and the first lens 110 or between the second and third lenses 120 and 130 .
- the object-side surface (the fifth surface S5 ) of the third lens 130 may serve as an diaphragm.
- the first to fifth lenses 110 , 120 , 130 , 140 , and 150 may have a set clear aperture.
- each of the first to tenth surfaces S1 , S2 , S3 , S4 , S5 , S6 , S7 , S8 , S9 , and S10 may have a set clear aperture size.
- the object-side surface or the image-side surface of one selected from the first lens 110 and the second lens 120 is the first to fifth lenses 110 , 120 , 130 , 140 , 150) may have the largest effective diameter among the first to tenth surfaces S1, S2, S3, S4, S5, S6, S7, S8, S9, and S10.
- the optical system 1000 may include at least one lens surface having a larger effective diameter than the object-side surface (the first surface S1) of the first lens 110 .
- the optical system 1000 may include one lens surface having a larger effective diameter than the first surface S1 . That is, at least one of the second to tenth surfaces S2, S3, S4, S5, S6, S7, S8, S9, and S10 has a larger clear aperture than the first surface S1. can have
- the size of the effective diameter of the image side surface (the second surface S2) of the first lens 110 may be larger than the size of the effective diameter of the object side surface (the first surface S1) of the first lens 110 have.
- the effective diameter of the second surface S2 may be the largest among the first to tenth surfaces S1, S2, S3, S4, S5, S6, S7, S8, S9, and S10.
- the size of the effective diameter of the first surface S1 is the second surface S2 of the first to tenth surfaces S1, S2, S3, S4, S5, S6, S7, S8, S9, and S10. can be next
- the size of the effective diameter of the second lens 120 may be smaller than the size of the effective diameter of the first lens 110 .
- the object-side surface (third surface S3) and the image-side surface (fourth surface S4) of the second lens 120 are the object-side surface (first surface) of the first lens 110 . It may have an effective diameter smaller than the surface S1) and the upper surface (the second surface S2).
- the size of the effective diameter of the third surface S3 is next to that of the first surface S1 among the first to tenth surfaces S1, S2, S3, S4, S5, S6, S7, S8, S9, S10. can be large
- the size of the effective diameter of the fourth surface S4 is the third surface S3 among the first to tenth surfaces S1, S2, S3, S4, S5, S6, S7, S8, S9, and S10. can be next
- At least one of the first to fifth lenses 110 , 120 , 130 , 140 and 150 may have a non-circular shape.
- the first lens 110 and the second lens 120 may have a non-circular shape.
- the first surface S1, the second surface S2, and the third surface S3 may have a non-circular shape
- the fourth to tenth surfaces S4, S5, S6, S7, S8, S9, and S10) may have a circular shape. That is, when each of the first to third surfaces S1 , S2 , and S3 is viewed from the front corresponding to the optical axis OA, the effective area of each lens surface may have a non-circular shape.
- the effective area of each of the first surface S1 , the second surface S2 and the third surface S3 is first to fourth corners A1 , A2 , A3 , A4 .
- the first edge A1 and the second edge A2 may be edges facing in a first direction (x-axis direction) perpendicular to the optical axis OA.
- the first corner A1 and the second corner A2 may have a curved shape.
- the first edge A1 and the second edge A2 may be provided in a curved shape having the same length and curvature.
- first edge A1 and the second edge A2 may have a symmetrical shape based on an imaginary line passing through the optical axis OA and extending in the second direction (y-axis direction).
- the third edge A3 and the fourth edge A4 may be edges facing the optical axis OA and a second direction (y-axis direction) perpendicular to the first direction.
- the third corner A3 and the fourth corner A4 may be corners connecting ends of the first corner A1 and the second corner A2.
- the third corner A3 and the fourth corner A4 may have a straight line shape.
- the third edge A3 and the fourth edge A4 may have the same length and may be parallel to each other.
- the third edge A3 and the fourth edge A4 may have a symmetrical shape based on an imaginary line passing through the optical axis OA and extending in the first direction (x-axis direction).
- the first surface S1, the second surface S2 and the third surface S3 have a non-circular shape, for example, by including the first to fourth corners A1, A2, A3, A4 described above. It may have a D-cut shape.
- the first surface S1 , the second surface S2 , and the third surface S3 have the non-circular shape described above in the process of manufacturing the first lens 110 and the second lens 120 . can have For example, when the first and second lenses 110 and 120 include a plastic material, they may be manufactured in the above-described non-circular shape during the injection process.
- first lens 110 and the second lens 120 may be manufactured in a circular shape through an injection process, and in the subsequent cutting process, the first surface S1 and the second surface ( S2) and a portion of the third surface S3 may be cut to have the third corner A3 and the fourth corner A4.
- each of the first surface S1 , the second surface S2 , and the third surface S3 may have a set size.
- a length (clear aperture) CA of a first imaginary straight line passing through the optical axis OA and connecting the first edge A1 and the second edge A2 is equal to the optical axis OA. It may be longer than a clear height (CH) of a second virtual straight line passing through and connecting the third corner A3 and the fourth corner A4 .
- the length CA of the first straight line may mean a clear aperture CA of each of the first to third surfaces S1, S2, and S3, and the length of the second straight line ( CH) may mean a clear height (CH) of an effective diameter of each of the first to third surfaces S1 , S2 , and S3 .
- the effective areas of the first to third surfaces S1 , S2 and S3 have a non-circular shape
- the present invention is not limited thereto, and the first to third surfaces S1 , S2 and S3 are not limited thereto.
- Each of the effective areas may have a circular shape
- each of the ineffective areas of the first to third surfaces S1 , S2 and S3 may have a non-circular shape.
- the optical system 1000 according to the embodiment may satisfy at least one of the following equations. Accordingly, the optical system 1000 according to the embodiment may have improved optical properties. In addition, when the optical system 1000 satisfies at least one of Equations to be described later, it can be implemented in a smaller and more compact manner. In addition, when the optical system 1000 satisfies at least one of the following equations, it is applicable to a folded camera module having a thinner thickness, and a device including the camera module may have a thinner thickness. have.
- L1S1_CA means a clear aperture (CA) of an object-side surface (first surface S1) of the first lens 110
- L1S2_CA is an image of the first lens 110 It means the size of the effective diameter (clear aperture; CA) of the side surface (second surface S2).
- L1S1_CA denotes a clear aperture (CA) of an object-side surface (first surface S1) of the first lens 110
- L2S1_CA denotes an object of the second lens 120 It means the size of the effective diameter (clear aperture; CA) of the side surface (third surface S3).
- L1S1_CA means a clear aperture (CA) of an object-side surface (first surface S1) of the first lens 110
- L2S2_CA is an image of the second lens 120 It means the size of the effective diameter (clear aperture; CA) of the side surface (the fourth surface S4).
- Equation 4 means an effective focal length of the optical system 1000 .
- [Equation 4] may satisfy 8 ⁇ EFL ⁇ 30 in consideration of the improvement of optical properties.
- [Equation 4] may satisfy 9 ⁇ EFL ⁇ 26.
- L1R1 means the radius of curvature of the object-side surface (first surface S1) of the first lens 110
- L1R2 is the image-side surface (second surface (second surface) of the first lens 110).
- S2) means the radius of curvature.
- L1R1 means the radius of curvature of the object-side surface (first surface S1) of the first lens 110
- L2R1 is the object-side surface (third surface (third surface) of the second lens 120).
- S3) means the radius of curvature.
- L1R2 is the radius of curvature of the image side surface (second surface S2) of the first lens 110
- L2R1 is the object side surface (third surface (third surface) of the second lens 120).
- S3) means the radius of curvature.
- L1R1 means the radius of curvature of the object-side surface (the first surface S1) of the first lens 110
- L3R1 is the object-side surface (the fifth surface) of the third lens 130. S5)
- S5 means the radius of curvature.
- 0.1 ⁇ L1R1 / L3R1 ⁇ 0.7 may be satisfied in consideration of optical characteristic improvement.
- [Equation 8] may satisfy 0.1 ⁇ L1R1 / L3R1 ⁇ 0.6.
- L2R1 is the radius of curvature of the object-side surface (third surface S3) of the second lens 120
- L3R1 is the object-side surface (the fifth surface (fifth surface) of the third lens 130).
- S5) means the radius of curvature.
- Equation 10 L1_CT denotes a central thickness of the first lens 110
- L2_CT denotes a central thickness of the second lens 120
- [Equation 10] may satisfy 0.2 ⁇ L1_CT ⁇ L2_CT ⁇ 0.65 in consideration of optical characteristic improvement.
- Equation 10 may satisfy 0.3 ⁇ L1_CT ⁇ L2_CT ⁇ 0.55.
- L1_CT denotes a central thickness of the first lens 110
- L3_CT denotes a central thickness of the third lens 130 .
- Equation 12 d12 denotes a center distance between the first lens 110 and the second lens 120 , and d23 denotes a distance between the second lens 120 and the third lens 130 . it means.
- Equation 13 d34 denotes a center distance between the third lens 130 and the fourth lens 140 , and d12 denotes a center distance between the first lens 110 and the second lens 120 .
- Equation 14 d34 denotes a center distance between the third lens 130 and the fourth lens 140 , and d23 denotes a center distance between the second lens 120 and the third lens 130 .
- Equation 15 d34 denotes a center distance between the third lens 130 and the fourth lens 140 , and d45 denotes a center distance between the fourth lens 140 and the fifth lens 150 .
- L1_CT denotes a center thickness of the first lens 110
- d12 denotes a center distance between the first lens 110 and the second lens 120 .
- Equation 17 L2_CT denotes a center thickness of the second lens 120 , and d12 denotes a center distance between the first lens 110 and the second lens 120 .
- Equation 18 f1 denotes a focal length of the first lens 110 , and f2 denotes a focal length of the second lens 120 .
- Equation 19 f1 denotes a focal length of the first lens 110, and TTL (Total Track Length) is from the vertex of the object-side surface (first surface S1) of the first lens 110. It means a distance in the direction of the optical axis OA to the upper surface of the image sensor 300 .
- Equation 20 f2 denotes a focal length of the second lens 120, and TTL (Total Track Length) is from the vertex of the object-side surface (first surface S1) of the first lens 110. It means a distance in the direction of the optical axis OA to the upper surface of the image sensor 300 .
- total track length (TTL) is the optical axis (OA) direction distance from the vertex of the object side surface (first surface S1) of the first lens 110 to the upper surface of the image sensor 300
- bf2 means a distance in the optical axis OA direction from the apex of the object-side surface (third surface S3 ) of the second lens 120 to the upper surface of the image sensor 300 .
- L1S1_CA means the maximum size (clear aperture CA) of the object-side surface (first surface S1) of the first lens 110
- L1S1_CH is the It means the minimum size (clear height; CH) of the effective diameter of the object side surface (the first surface S1).
- [Equation 22] may satisfy 0.56 ⁇ L1S1_CH / L1S1_CA ⁇ 0.9 in order to provide the optical system 1000 more slim.
- [Equation 22] may satisfy 0.6 ⁇ L1S1_CH / L1S1_CA ⁇ 0.85.
- Equation 23 L1S2_CA means the maximum size (clear aperture; CA) of the image side surface (second surface S2) of the first lens 110, L1S2_CH is the first lens (110) It means the minimum size (clear height; CH) of the effective diameter of the upper surface (the second surface S2).
- Equation 23 may satisfy 0.56 ⁇ L1S2_CH / L1S2_CA ⁇ 0.9 in order to provide the optical system 1000 more slim.
- Equation 23 may satisfy 0.6 ⁇ L1S2_CH / L1S2_CA ⁇ 0.85.
- Equation 24 L2S1_CA means the maximum size (clear aperture CA) of the object-side surface (third surface S3) of the second lens 120, and L2S1_CH is the It means the minimum size (clear height; CH) of the effective diameter of the object side surface (third surface S3).
- Equation 24 may satisfy 0.56 ⁇ L2S1_CH / L2S1_CA ⁇ 0.9 in order to provide the optical system 1000 more slim.
- Equation 24 may satisfy 0.6 ⁇ L2S1_CH / L2S1_CA ⁇ 0.85.
- L1S1_CA means the maximum size of the effective diameter (clear aperture CA) of the object-side surface (the first surface S1) of the first lens 110
- L1S2_CA is the maximum size of the first lens 110 It means the maximum size (clear aperture; CA) of the effective diameter of the upper surface (the second surface S2).
- L2S1_CA means the maximum size (clear aperture CA) of the effective diameter of the object-side surface (third surface S3) of the second lens 120 .
- L1S1_CH means the minimum size (clear height; CH) of the effective diameter of the object-side surface (first surface S1) of the first lens 110
- L1S2_CH is the It means the minimum size (clear height; CH) of the effective diameter of the upper surface (the second surface S2).
- L2S1_CH means the minimum size (clear height; CH) of the effective diameter of the object-side surface (third surface S3) of the second lens 120 .
- n1d denotes a refractive index index of the first lens 110 .
- n2d denotes a refractive index of the second lens 120 .
- V1d denotes an Abbe-number of the first lens 110 .
- V2d denotes an Abbe-number of the second lens 120 .
- Equation 31 F# denotes an F-number of the optical system 1000 .
- total track length (TTL) is the optical axis (OA) direction distance from the vertex of the object side surface (first surface S1) of the first lens 110 to the upper surface of the image sensor 300
- ImgH is the vertical angle of the optical axis OA from the field center 0 field area of the image sensor 300 overlapping the optical axis OA to the 1.0 field area of the image sensor 300 . direction distance. That is, the ImgH denotes a value of 1/2 of the length in the diagonal direction of the effective area of the image sensor 300 .
- Back focal length (BFL) is the optical axis (OA) direction distance from the vertex of the image side surface (the tenth surface S10) of the fifth lens 150 to the upper surface of the image sensor 300
- ImgH is the vertical angle of the optical axis OA from the field center 0 field area of the image sensor 300 overlapping the optical axis OA to the 1.0 field area of the image sensor 300 . direction distance. That is, the ImgH denotes a value of 1/2 of the length in the diagonal direction of the effective area of the image sensor 300 .
- TTL Total Track Length
- BFL back focal length refers to the distance in the optical axis (OA) direction from the apex of the image side surface (the tenth surface S10) of the fifth lens 150 to the upper surface of the image sensor 300 .
- EFL means an effective focal length of the optical system 1000, and total track length (TTL) of the object-side surface (first surface S1) of the first lens 110 It means a distance in the direction of the optical axis (OA) from the vertex to the upper surface of the image sensor 300 .
- EFL means an effective focal length of the optical system 1000, and a back focal length (BFL) of the image side surface (10th surface S10) of the fifth lens 150 It means a distance in the direction of the optical axis (OA) from the vertex to the upper surface of the image sensor 300 .
- Equation 37 EFL means an effective focal length of the optical system 1000 , and EPD means an entrance pupil size of the optical system 1000 .
- Z is Sag, which may mean a distance in the optical axis direction from an arbitrary position on the aspherical surface to the vertex of the aspherical surface.
- Y may mean a distance in a direction perpendicular to the optical axis from an arbitrary position on the aspherical surface to the optical axis.
- c may mean a curvature of the lens
- K may mean a conic constant
- A, B, C, D, E, and F may mean an aspheric constant.
- the optical system 1000 according to the embodiment may satisfy at least one of Equations 1 to 37.
- the optical system 1000 may include at least one lens surface having an effective diameter larger than that of the first surface S1 and may have improved optical properties.
- At least one of the plurality of lenses 100 of the optical system 1000 may have a non-circular shape, for example, a D-cut shape.
- the first lens 110 and the second lens 120 may have a non-circular shape.
- the effective area of the first to third surfaces S1, S2, and S3 may have a non-circular shape, and the remaining surfaces S4, S5, S6, S7, S8, S9, The effective area of S10) may have a circular shape. Accordingly, the optical system 1000 can be implemented in a smaller size, and can be provided more compactly compared to an optical system in which all lenses have a circular shape.
- the optical system 1000 may prevent or minimize performance degradation due to reduction in the effective area by satisfying at least one of Equations 1 to 37 described above.
- the optical system 1000 when the optical system 1000 satisfies at least one of Equations 1 to 37, it may be applicable to a folded camera.
- the optical system 1000 may change the light incident in a direction perpendicular to the surface of the device to which the light path changing member is applied in a direction parallel to the surface of the device.
- the optical system 1000 including a plurality of lenses may have a thinner thickness within the device, and the device may be provided with a thinner thickness.
- lens noodle Clear aperture (CA) (mm) Minimum size of effective diameter (Clear height; CH) (mm) first lens side 1 1.9500 1.6000 2nd side 1.9603 1.6000 second lens 3rd side 1.8493 1.6000 side 4 1.5498 - third lens page 5 1.5162 - page 6 1.3557 - 4th lens page 7 1.2790 - page 8 1.2414 - 5th lens page 9 1.4082 - page 10 1.4000 -
- Table 1 shows the radius of curvature of the first to fifth lenses 110 , 120 , 130 , 140 and 150 according to the embodiment, the center thickness (mm) (thickness) of each lens, and the center distance (mm) between each lens (distance), refractive index (Refractive index), and Abbe's Number. aperture (CA) and the size of the smallest effective diameter (clear aperture (CH)).
- Table 3 shows a total track length (TTL), an effective focal length (EFL), a back focus length (BFL) and a focal length of the plurality of lenses 100 of the optical system 1000 according to the embodiment. it is about
- the refractive indices of the first lens 110 and the second lens 120 may be the same.
- the refractive indices of the first lens 110 and the second lens 120 may be smaller than the refractive indices of the third lens 130 .
- the refractive indices of the fourth lens 140 and the fifth lens 150 may be greater than the refractive indices of the first lens 110 and the second lens 120 , and the refractive indices of the third lens 130 . It may be less than the refractive index.
- the Abbe numbers of the first lens 110 and the second lens 120 may be the same.
- the Abbe numbers of the first lens 110 and the second lens 120 may be greater than the Abbe numbers of the third lens 130 .
- the Abbe numbers of the fourth lens 140 and the fifth lens 150 may be smaller than the Abbe numbers of the first lens 110 and the second lens 120 , and the third lens 130 . ) can be greater than the Abbe number of
- each of the surfaces S1, S2, S3, S4, S5, S6, S7, S8, S9, S10 of the first to fifth lenses 110, 120, 130, 140, 150 is set It can have the size of an effective diameter.
- the maximum size of the effective diameter of the second surface S2 may be greater than the maximum size of the effective diameter of the first surface S1 (Clear aperture CA)
- the maximum size of the effective diameter of the first surface S1 may be greater than the maximum size of the effective diameter of the third surface S3 (clear aperture CA).
- the clear height CH of the first surface S1 , the second surface S2 , and the third surface S3 may be the same as each other.
- the size (clear height; CH) of the minimum effective diameter of the first to third surfaces S1, S2, S3 is the fourth to tenth surfaces S4, S5, S6, S7, S8, S9, S10. It may be larger than the size of the maximum effective diameter (Clear aperture; CA) of .
- the effective focal length EFL of the optical system 1000 may be smaller than the focal length f1 of the first lens 110 . Also, the effective focal length EFL of the optical system 1000 may be greater than the focal length f2 of the second lens 120 . In addition, the focal length f1 of the first lens 110 among the first to fifth lenses 110 , 120 , 130 , 140 and 150 may be the largest.
- Table 4 shows the result values of the optical system 1000 according to the embodiment with respect to the above-described equations. Referring to Table 4, it can be seen that the optical system 1000 according to the embodiment satisfies at least one of Equations 1 to 37. In detail, it can be seen that the optical system 1000 satisfies all of Equations 1 to 37.
- FIG. 4 is a graph of the aberration diagram of the optical system 1000 according to the embodiment, in which Longitudinal Spherical Aberration, Astigmatic Field Curves, and Distortion are measured from left to right. It is a graph.
- the X-axis may indicate a focal length (mm) or distortion (%)
- the Y-axis may indicate the height of an image.
- the graph for spherical aberration is a graph for light in the wavelength bands of about 435 nm, about 486 nm, about 546 nm, about 587 nm, and about 656 nm
- the graph for astigmatism and distortion aberration is a graph for light in the wavelength band of 546 nm.
- FIG. 5 is a graph showing diffraction MTF characteristics according to a lens position in the optical system 1000 according to the embodiment
- FIG. 6 is an aberration diagram showing chromatic aberration of the optical system 1000 according to the embodiment.
- the optical system 1000 is a graph of coma aberration of the optical system 1000 according to the embodiment, and is a graph of light in wavelength bands of about 435 nm, about 486 nm, about 546 nm, about 587 nm, and about 656 nm depending on the field height of the image. It is a graph measuring the aberration of the tangential component and the sagittal component.
- the interpretation of the coma graph can be interpreted that the closer the X-axis on the positive and negative axes, the better the coma correction function. That is, the optical system 1000 according to the embodiment may have improved optical properties.
- the optical system 1000 may include at least one lens surface having a larger clear aperture than the first surface S1 of the first lens 110 and may have improved optical characteristics.
- the optical system 1000 has excellent aberration characteristics, and since the measured values appear adjacent to the X-axis in almost all fields as shown in FIG. 7 , an excellent coma aberration correction function It can be seen that has
- At least one lens in the optical system 1000 may have a non-circular shape, for example, a D-cut shape. Accordingly, the optical system 1000 can be implemented in a small size, has improved optical performance, and can be provided more compactly than an optical system having only a circular shape. Also, the optical system 1000 may include a plurality of lenses and a light path changing member (not shown). Accordingly, the optical system 1000 can be applied to a folded camera that can have a thinner thickness, and a device including the camera can be manufactured with a thin thickness.
- FIG. 8 is a diagram illustrating that the camera module according to the embodiment is applied to a mobile terminal.
- the mobile terminal 1 may include a camera module 10 provided on the rear side.
- the camera module 10 may include an image capturing function.
- the camera module 10 may include at least one of an auto focus function, a zoom function, and an OIS function.
- the camera module 10 may process a still image image or an image frame of a moving image obtained by the image sensor 300 in a shooting mode or a video call mode.
- the processed image frame may be displayed on a display unit (not shown) of the mobile terminal 1 and may be stored in a memory (not shown).
- the camera module may be further disposed on the front of the mobile terminal 1 .
- the camera module 10 may include a first camera module 10A and a second camera module 10B.
- the mobile terminal 1 may further include an autofocus device 31 .
- the auto focus device 31 may include an auto focus function using a laser.
- the auto focus device 31 may be mainly used in a condition in which the auto focus function using the image of the camera module 10 is deteriorated, for example, in proximity of 10 m or less or in a dark environment.
- the autofocus device 31 may include a light emitting unit including a vertical cavity surface emission laser (VCSEL) semiconductor device and a light receiving unit that converts light energy such as a photodiode into electrical energy.
- the mobile terminal 1 may further include a flash module 33 .
- the flash module 33 may include a light emitting device emitting light therein. The flash module 33 may be operated by a camera operation of a mobile terminal or a user's control.
Abstract
Description
렌즈 | 면 | 곡률 반경 (mm) | 두께(mm)/간격 (mm) | 굴절률 | 아베수 |
제1 렌즈 | 제1 면 | -54.5900 | 0.5494 | 1.5368 | 55.6762 |
제2 면 | -7.1533 | 0.0500 | |||
제2 렌즈 | 제3 면 | 2.8652 | 1.3000 | 1.5368 | 55.6762 |
제4 면 | 5.8532 | 0.2812 | |||
제3 렌즈 | 제5 면 (stop) |
-347.7532 | 0.8257 | 1.6580 | 21.4847 |
제6 면 | 5.1670 | 1.1500 | |||
제4 렌즈 | 제7 면 | 28.7814 | 0.5860 | 1.5928 | 28.2687 |
제8 면 | 4.2894 | 1.0500 | |||
제5 렌즈 | 제9 면 | 3.8192 | 0.5097 | 1.6206 | 25.9493 |
제10 면 | 11.2228 |
렌즈 | 면 | 유효경의 최대 크기(Clear aperture; CA) (mm) | 유효경의 최소 크기(Clear height; CH) (mm) |
제1 렌즈 | 제1 면 | 1.9500 | 1.6000 |
제2 면 | 1.9603 | 1.6000 | |
제2 렌즈 | 제3 면 | 1.8493 | 1.6000 |
제4 면 | 1.5498 | - | |
제3 렌즈 | 제5 면 | 1.5162 | - |
제6 면 | 1.3557 | - | |
제4 렌즈 | 제7 면 | 1.2790 | - |
제8 면 | 1.2414 | - | |
제5 렌즈 | 제9 면 | 1.4082 | - |
제10 면 | 1.4000 | - |
항목 | 실시예 |
EFL | 11.0808 mm |
TTL | 11.0000 mm |
BFL | 4.6979 mm |
F# | 2.8412 |
ImgH | 2.0510 mm |
bf2 | 10.4006 mm |
EPD | 3.9000 mm |
f1 | 15.2734 mm |
f2 | 9.0762 mm |
f3 | -7.7303 mm |
f4 | -8.5793 mm |
f5 | 9.0888 mm |
수학식 | 실시예 | |
수학식 1 | 0.9 < L1S1_CA / L1S2_CA < 1 | 0.995 |
수학식 2 | 1 < L1S1_CA / L2S1_CA < 1.2 | 1.054 |
수학식 3 | 1 < L1S1_CA/ L2S2_CA < 1.35 | 1.258 |
수학식 4 | 7 < EFL < 40 | 11.081 |
수학식 5 | 6.5 < L1R1 / L1R2 < 8.5 | 7.631 |
수학식 6 | |-20 < L1R1 / L2R1 < -15 | -19.053 |
수학식 7 | |-3 < L1R2 / L2R1 < -1 | -2.497 |
수학식 8 | 0 .1 < L1R1 / L3R1 < 0.8 | 0.157 |
수학식 9 | |-130 < L3R1 / L2R1 < -110 | -121.372 |
수학식 10 | 0.1 < L1_CT / L2_CT < 0.75 | 0.423 |
수학식 11 | 0.5 < L1_CT / L3_CT < 0.9 | 0.665 |
수학식 12 | 0.1 < d12 / d23 < 0.4 | 0.178 |
수학식 13 | 20 < d34 / d12 < 30 | 23.000 |
수학식 14 | 3.5 < d34 / d23 < 7 | 4.090 |
수학식 15 | 0.5 < d34 / d45 < 2 | 1.095 |
수학식 16 | 5 < L1_CT / d12 < 15 | 10.988 |
수학식 17 | 20 < L2_CT / d12 < 30 | 26.000 |
수학식 18 | 1 < f1 / f2 < 2 | 1.683 |
수학식 19 | 1 < f1 / TTL < 1.8 | 1.378 |
수학식 20 | 0.5 < f2 / TTL < 1.2 | 0.819 |
수학식 21 | 1 < TTL / bf2 < 1.2 | 1.058 |
수학식 22 | 0.52 < L1S1_CH / L1S1_CA < 0.98 | 0.821 |
수학식 23 | 0.52 < L1S2_CH / L1S2_CA < 0.98 | 0.816 |
수학식 24 | 0.52 < L2S1_CH / L2S1_CA < 0.98 | 0.865 |
수학식 25 | L1S2_CA > L1S1_CA > L2S1_CA | 만족 |
수학식 26 | L1S1_CH = L1S2_CH = L2S1_CH | 만족 |
수학식 27 | 1.4 < n1d < 1.6 | 1.537 |
수학식 28 | 1.4 < n2d < 1.6 | 1.537 |
수학식 29 | 40 < V1d <80 | 55.676 |
수학식 30 | 40 < V2d <80 | 55.676 |
수학식 31 | F# < 3 | 2.841 |
수학식 32 | 4 < TTL / ImgH < 6.5 | 5.363 |
수학식 33 | 1 < BFL / ImgH < 3.5 | 2.291 |
수학식 34 | 1.5 < TTL / BFL < 3.5 | 2.341 |
수학식 35 | 1 < EFL / TTL < 1.5 | 1.007 |
수학식 36 | 2 < EFL / BFL < 3 | 2.359 |
수학식 37 | 2 < EFL / EPD < 4 | 2.841 |
Claims (12)
- 물체 측으로부터 상 측 방향으로 광축을 따라 순차적으로 배치되는 제1 내지 제5 렌즈를 포함하고,상기 제1 렌즈는 양의 굴절력을 가지고,상기 제2 렌즈는 양의 굴절력을 가지고,상기 제1 내지 제5 렌즈 각각은 물체 측 면 및 상 측 면을 포함하고,상기 제1 렌즈의 상 측 면, 상기 제2 내지 제5 렌즈의 물체 측 면 및 상 측 면 중 적어도 하나의 면은, 상기 제1 렌즈의 물체 측 면보다 큰 유효경(Clear aperture) 크기를 가지는 광학계.
- 제1 항에 있어서,상기 제1 렌즈의 상 측 면의 유효경의 크기는 상기 제1 렌즈의 물체 측 면의 유효경의 크기보다 큰 광학계.
- 제2 항에 있어서,상기 제1 렌즈의 물체 측 면은 오목한 광학계.
- 제3 항에 있어서,상기 제1 렌즈는 하기 수학식 1을 만족하는 광학계.[수학식 1]0.95 < L1S1_CA / L1S2_CA < 1(수학식 1에서 L1S1_CA은 상기 제1 렌즈의 물체 측 면의 유효경(Clear aperture; CA) 크기를 의미하고, L1S2_CA는 상기 제1 렌즈의 상 측 면의 유효경의 크기(Clear aperture; CA)를 의미한다.)
- 제1 항에 있어서,상기 광학계의 유효 초점 거리(Effective Focal Length)는 하기 수학식 2를 만족하는 광학계.[수학식 2]7 < EFL < 40(수학식 2에서 EFL은 상기 광학계의 유효 초점 거리를 의미한다.
- 제1 항에 있어서,상기 제1 및 제2 렌즈는 하기 수학식 3을 만족하는 광학계.[수학식 3]0.1 < L1_CT / L2_CT < 0.75(수학식 3에서 L1_CT는 상기 제1 렌즈의 중심 두께를 의미하고, L2_CT는 상기 제2 렌즈의 중심 두께를 의미한다.)
- 제1 항 내지 제6 항 중 어느 한 항에 있어서,상기 광학계의 F-number는 3미만인 광학계.
- 제7 항에 있어서,상기 물체와 상기 제1 내지 제5 렌즈 사이에 배치되는 광 경로 변경 부재를 더 포함하고,상기 광 경로 변경 부재는, 상기 광 경로 변경 부재에 제1 방향으로 입사된 광의 경로를 상기 제1 내지 제5 렌즈의 배치 방향인 제2 방향으로 변경하는 광학계.
- 물체 측으로부터 상 측 방향으로 광축을 따라 순차적으로 배치되는 제1 내지 제5 렌즈를 포함하고,상기 제1 렌즈는 양의 굴절력을 가지고,상기 제2 렌즈는 양의 굴절력을 가지고,상기 제1 렌즈는 상 측으로 볼록한 메니스커스 형상을 가지고,상기 제2 렌즈의 물체 측면은 볼록하고,상기 제1 내지 제5 렌즈 중 적어도 하나의 렌즈는 비원형 형상을 가지는 광학계.
- 제9 항에 있어서,상기 제1 내지 제5 렌즈 각각은 물체 측 면 및 상 측 면을 포함하고,상기 제1 렌즈의 상 측 면, 상기 제2 내지 제5 렌즈의 물체 측 면 및 상 측 면 중 적어도 하나의 면은, 상기 제1 렌즈의 물체 측 면보다 큰 유효경(Clear aperture) 크기를 가지는 광학계.
- 제10 항에 있어서,상기 제1 렌즈의 물체 측면은 비원형 형상을 가지며, 하기 수학식 4를 만족하는 광학계.[수학식 4]0.52 < L1S1_CH / L1S1_CA < 0.98(수학식 4에서 L1S1_CA는 상기 제1 렌즈의 유효경의 최대 크기(Clear aperture; CA)를 의미하고, L1S1_CH는 비원형 형상에 따른 상기 제1 렌즈의 유효경의 최소 크기(Clear height; CH)를 의미한다.
- 제11 항에 있어서,상기 제1 렌즈의 상 측 면 및 상기 제2 렌즈의 물체 측 면은 비원형 형상을 가지는 광학계.
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EP21903901.3A EP4261589A1 (en) | 2020-12-10 | 2021-12-10 | Optical system and camera module including same |
JP2023535545A JP2023553447A (ja) | 2020-12-10 | 2021-12-10 | 光学系及びこれを含むカメラモジュール |
US18/256,974 US20240045178A1 (en) | 2020-12-10 | 2021-12-10 | Optical system and camera module including same |
CN202180090073.2A CN116685885A (zh) | 2020-12-10 | 2021-12-10 | 光学系统和包括该光学系统的相机模块 |
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KR101123776B1 (ko) * | 2011-12-22 | 2012-03-16 | 대원전광주식회사 | 가시광선 및 근적외선용 감시카메라 핀홀렌즈 |
JP2015072404A (ja) * | 2013-10-04 | 2015-04-16 | コニカミノルタ株式会社 | 撮像レンズ、撮像装置及び携帯端末 |
JPWO2013137312A1 (ja) * | 2012-03-15 | 2015-08-03 | コニカミノルタ株式会社 | 撮像レンズ、撮像装置、及び携帯端末 |
KR20180015487A (ko) * | 2016-08-03 | 2018-02-13 | 주식회사 코렌 | 옵티칼 렌즈 어셈블리 및 이를 포함한 전자 장치 |
KR20200031512A (ko) * | 2018-09-14 | 2020-03-24 | 삼성전기주식회사 | 촬상 광학계 |
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2020
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- 2021-12-10 JP JP2023535545A patent/JP2023553447A/ja active Pending
- 2021-12-10 US US18/256,974 patent/US20240045178A1/en active Pending
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KR101123776B1 (ko) * | 2011-12-22 | 2012-03-16 | 대원전광주식회사 | 가시광선 및 근적외선용 감시카메라 핀홀렌즈 |
JPWO2013137312A1 (ja) * | 2012-03-15 | 2015-08-03 | コニカミノルタ株式会社 | 撮像レンズ、撮像装置、及び携帯端末 |
JP2015072404A (ja) * | 2013-10-04 | 2015-04-16 | コニカミノルタ株式会社 | 撮像レンズ、撮像装置及び携帯端末 |
KR20180015487A (ko) * | 2016-08-03 | 2018-02-13 | 주식회사 코렌 | 옵티칼 렌즈 어셈블리 및 이를 포함한 전자 장치 |
KR20200031512A (ko) * | 2018-09-14 | 2020-03-24 | 삼성전기주식회사 | 촬상 광학계 |
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JP2023553447A (ja) | 2023-12-21 |
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KR20220082525A (ko) | 2022-06-17 |
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