WO2022182192A1 - 광학계 및 이를 구비한 카메라 모듈 - Google Patents
광학계 및 이를 구비한 카메라 모듈 Download PDFInfo
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- WO2022182192A1 WO2022182192A1 PCT/KR2022/002777 KR2022002777W WO2022182192A1 WO 2022182192 A1 WO2022182192 A1 WO 2022182192A1 KR 2022002777 W KR2022002777 W KR 2022002777W WO 2022182192 A1 WO2022182192 A1 WO 2022182192A1
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- lens
- length
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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
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
-
- 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
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/0065—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
- G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/04—Simple or compound lenses with non-spherical faces with continuous faces that are rotationally symmetrical but deviate from a true sphere, e.g. so called "aspheric" lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
-
- 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 -
- G02B9/62—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having six 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
-
- 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 of the invention relates to an optical system and a camera module having 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 for forming an image, and an image sensor for converting 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
- AF autofocus
- zooming function of zooming up or zooming out may be performed by increasing or decreasing the magnification of .
- the camera module employs image stabilization (IS) technology to correct or prevent image stabilization when the camera is moved by an unstable fixing device or a user's movement.
- IS image stabilization
- the most important element for this camera module to acquire 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 (+) and/or negative (-) refractive power is being conducted to realize a high-performance optical system.
- the entire optical system may increase, and it is difficult to derive excellent optical and aberration characteristics.
- At least one of the plurality of lenses may provide an optical system in which any one of an object-side first surface and a sensor-side second surface has a non-circular shape. In an embodiment of the present invention, at least one of the plurality of lenses may provide an optical system in which lengths in first and second directions perpendicular to an optical axis are different from one of an object-side first surface and a sensor-side second surface. In an embodiment of the present invention, at least one of the plurality of lenses may provide an optical system in which one or both sides in the second direction have an inclination with respect to the optical axis. In an embodiment of the present invention, at least one of the plurality of lenses may provide an optical system having both inclined sides. An embodiment of the invention may provide a camera module having the optical system and a portable terminal having the same.
- An optical system includes a plurality of lenses arranged in a direction from an object side to a sensor side, and at least one first lens of the plurality of lenses includes a first surface that is an object-side surface and a second surface that is a sensor-side surface. Including, wherein the length in the first direction of the first surface is different from the length in the first direction of the second surface, the length in the first direction of the first surface is shorter than the length in the second direction of the first surface, The first direction may be orthogonal to the optical axis of the lenses, and the second direction may be orthogonal to the first direction and the optical axis.
- the first lens may be the lens closest to the object side among the plurality of lenses.
- the first lens may be a lens closest to the sensor side among the plurality of lenses.
- a length of the first surface in the first direction may be shorter than a length of the second surface in the first direction.
- the first lens may include a first side and a second side on both sides in the first direction, and at least one of the first side and the second side may have an inclination with respect to an optical axis.
- an angle between at least one of the first side and the second side and the optical axis may be 5 to 10 degrees.
- the slopes of the first side and the second side may be equal to each other.
- a length in the second direction of the first surface may be the same as a length in the first direction of the second surface.
- a length of the first surface in the first direction may be longer than a length of the second surface in the first direction.
- a radius of curvature of the first surface in the optical axis may be greater than a radius of curvature of the second surface in the optical axis.
- an inclined side surface on the outside of at least one of the lenses in the camera module, it is possible to reduce the problem that unnecessary light (ie, miscellaneous light) is condensed on the image sensor or the light size increases.
- one or a plurality of inclined side surfaces are provided on the outer side surface of at least one lens close to the object, thereby reducing the size of stray light by changing the path of some incident light.
- at least one lens close to the object is provided with different lengths in the first and second directions of any one of the first and second surfaces on which light is incident and emitted, so that an image is obtained by changing the path of some incident light.
- FIG. 1 is an example of a side cross-sectional view of an optical system according to an embodiment of the invention.
- FIG. 2 is a view of a first lens in the optical system of FIG. 1 .
- FIG. 3 is a perspective view of the first lens of FIG. 2 .
- FIG. 4 is a side view of the first lens of FIG. 3 .
- 5A and 5B are plan views illustrating a first surface and a second surface of the first lens of FIG. 2 .
- 6A and 6B are side views viewed from the first direction Y and the second direction X with respect to the first lens of FIG. 5 .
- 7A and 7B are a first modified example of the first lens of FIG. 2 , and are other examples of an inclined side surface viewed in the first direction Y. Referring to FIG.
- FIG. 8 is a second modified example of the first lens of FIG. 2 , and is a side view viewed in the first direction (Y).
- FIG. 9 is a third modified example of the first lens of FIG. 2 , and is a side view viewed in the first direction (Y).
- FIG. 10 is a side view of the fourth modified example of the first lens of FIG. 2 as viewed in the first direction Y. Referring to FIG.
- FIG 11 is a side view of the fifth modified example of the first lens of FIG. 2 viewed in the first direction (Y).
- 12A and 12B are a sixth modified example of the first lens of FIG. 2 , in which both sides viewed in the first direction Y are different.
- FIG. 13A and 13B are another example of FIG. 12 , and both sides viewed from the first direction Y are different.
- FIGS. 14A and 14B are views illustrating a light path incident to a side surface of a first lens as a comparative example and an example of the invention.
- 15 is another example of a first lens in the optical system of FIG.
- 16A and 16B are plan views of the first and second surfaces of the first lens of FIG. 15 as viewed from the object side and the sensor side.
- 17 is a side view of the first lens of FIG. 15 as viewed in the first direction (Y).
- FIG. 18 is another example of a side view of the first lens of FIG. 15 viewed in the first direction (Y).
- 19 is another example of the first lens in the optical system of FIG.
- 20A and 20B are views for explaining an optical path according to a shape change of the second surface of the first lens according to an embodiment of the present invention.
- 21 (A) (B) (C) are views comparing the path of the incident light according to the side shape of the first lens according to an embodiment of the present invention.
- FIG. 22 is an example of a cutting line for explaining the inclined side of the first lens in the optical system according to an embodiment of the present invention.
- 23A and 23B are other examples of plan views illustrating the first and second surfaces of the first lens of FIG. 2 or FIG. 5 .
- 24 is a view for explaining the degree of change in resolution according to the inclined angle of the side surface of the first lens in the optical system according to an embodiment of the present invention.
- 25 is a diagram illustrating a location of miscellaneous light in an image sensor according to an embodiment of the present invention.
- 26 is a view comparing the position and size of a flare formed on an image sensor according to a side inclination angle of a first lens in an optical system according to an embodiment of the present invention.
- FIGS. 27 and 28 are views illustrating a flare distribution and irradiance formed on an image sensor in an optical system according to a comparative example and an embodiment of the present invention.
- 29 is a perspective view of a portable terminal having an optical system according to an embodiment of the present invention.
- a component 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.
- the top (above) or bottom (below) is one as well as when two components are in direct contact with each other. Also includes a case in which another component as described above is formed or disposed between two components.
- the first lens means the lens closest to the object side among the plurality of lenses aligned with the optical axis
- the last lens means the lens closest to the sensor side among the plurality of lenses aligned with the optical axis.
- the units for the radius, thickness/distance, and TTL of the lens are all mm.
- the shape of the lens is shown based on the optical axis of the lens. For example, that the object-side or sensor-side surface of the lens is convex means that the optical axis vicinity is convex on the object-side or sensor-side surface of the lens, but does not mean that the optical axis periphery is convex.
- the portion around the optical axis on the object-side or sensor-side surface of the lens may be concave. That the object-side or sensor-side surface of the lens is concave means that the vicinity of the optical axis is concave on the object-side or sensor-side surface of the lens, but does not mean that the periphery of the optical axis is concave. Accordingly, even in the case where the object-side or sensor-side surface of the lens is described as being concave, the portion around the optical axis on the object-side or sensor-side surface of the lens may be convex.
- the thickness and radius of curvature of the lens are measured based on the optical axis of the lens.
- object side may mean a surface of the lens that faces the object side with respect to the optical axis
- sensor side refers to the lens that faces the imaging surface or image sensor with respect to the optical axis. It may mean the side of or the side opposite to the side of the object.
- the optical system according to an embodiment of the present invention may include a lens made of a glass material and/or a lens made of a plastic material.
- FIG. 1 is an example of a side cross-sectional view of an optical system according to an embodiment of the invention
- FIG. 2 is a view of a first lens in the optical system of FIG. 1
- FIG. 3 is a perspective view of the first lens of FIG. 2
- FIG. 4 is FIG. is a side view of the first lens of FIG. 5
- A) (B) is a plan view viewed from the first and second surfaces of the first lens of FIG. 2, (A) (B) of FIG. It is a side view viewed from the first direction (Y) and the second direction (X) with respect to the first lens.
- an optical system may include an optical system having four or more lenses or five or more lenses.
- the optical system may include a lens unit 110 having five lenses 111,112,113,114,115 or six lenses 111,112,113,114,115,116 stacked in the direction of the image sensor 190 from the object side.
- the lens unit 110 may be aligned with the optical axis Lz from the first lens 111 closest to the object side to the fifth lens 115 or the sixth lens 116 .
- the first direction (Y) perpendicular to the optical axis (Lz) direction (Z) is the height of the camera module, the thickness direction of the mobile terminal, or the height direction of the movable body, and the second direction (X) is the first direction (Y) ) and the direction perpendicular to the optical axis direction (Z).
- the optical system may include the reflective member 101 on the object side of the first lens 111 .
- the reflective member 101 may be implemented as a prism, and may reflect light incident in the direction of the axis Ly orthogonal to the optical axis Lz of the lens unit 110 .
- another lens may be further disposed on the object side of the reflective member 101 .
- the optical axis Lz of the lens unit 110 and the center of the image sensor 190 may be disposed on the same axis or may be aligned on different axes.
- another reflective member may be further disposed between the lens unit 110 and the image sensor 190 .
- one of at least two first lens groups close to the object side and at least two second lens groups close to the sensor side may be moved in the optical axis direction (Z).
- any one of the first lens group of the first, second, and third lenses 111 , 112 , and 113 and the second lens group of the fourth, fourth, and sixth lenses 114 , 115 and 116 may be moved in the optical axis direction Z.
- the optical system may implement an auto focusing (AF) function by a lens group moving in the optical axis direction (Z).
- An embodiment of the present invention provides an optical system for focusing by moving only one lens group, so that an increase in space or a movement distance can be relatively suppressed.
- any one of the first lens group and the second lens group may be moved in a direction orthogonal to the optical axis for an OIS (Optical Image Stabilizer) function.
- the camera module may include a driving member for moving the optical system, and the driving member may be an actuator or a piezoelectric element for an AF function and/or an OIS function.
- Lenses in the optical system may include lenses made of a solid material, for example, a glass material and/or a plastic material. At least one or all of the lenses 111 , 112 , 113 , 114 , and 115 may include an aspherical surface on an incident-side surface. At least one or all of the lenses 111 , 112 , 113 , 114 and 115 may include an aspherical surface on an object-side surface and/or a sensor-side surface.
- the optical system may include a diaphragm ST for adjusting the amount of incident light.
- the diaphragm ST may be disposed between any one of the first, second, and third lenses 111 , 113 , and 115 , and for example, may be disposed around the sensor-side surface of the first lens 111 .
- the sixth lens 116 may be a lens that does not affect optical performance, and may be removed, and will be described as the center of the lens unit 110 having the first to fifth lenses 111 , 112 , 113 , 114 and 115 .
- the light corresponding to the image information of the object is the first lens 111 , the second lens 112 , the third lens 113 , the fourth lens 114 , the fifth lens 115 , and the sixth lens 116 .
- Each of the first to sixth lenses 111 , 112 , 113 , 114 , 115 , and 116 may include an effective area and an ineffective area.
- the effective area may be an area through which light incident on each lens 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.
- the ineffective region may be a region independent of the optical characteristic.
- the ineffective region may be a region fixed to a lens holder or a barrel (not shown) for accommodating lenses.
- the effective focal length (EFL) may be 35 mm or less, for example, 10 mm to 35 mm or 13 mm to 23 mm.
- TTL Total Top Length
- the F number of the optical system may be 4 or less, for example, in the range of 2.5 to 4 or in the range of 3 to 3.6.
- the distance to the object is at least 30 mm or more, for example, 35 mm, and may be at most infinity.
- a field of view (FOV) may be a narrow angle, for example, 50 degrees or less.
- the first lens 111 may be a lens closest to the object side in the optical system or a lens closest to the reflective member 101 .
- the first lens 111 may have positive (+) refractive power.
- the first lens 111 may include a glass material or a plastic material.
- the first lens 111 may include a first surface S1 defined as an object-side surface and a second surface S2 defined as a sensor-side surface.
- the first surface S1 may be an incident surface, and the second surface S2 may be an exit surface.
- the first surface S1 may be convex and the second surface S2 may be concave. That is, the first lens 111 may have a meniscus shape convex toward the object.
- At least one or both of the first surface S1 and the second surface S2 may be aspherical.
- a radius of curvature of the first surface S1 of the first lens 111 may be greater than a radius of curvature of the second surface S2 of the first lens 111 .
- the effective diameter or effective area of the first surface S1 of the first lens 111 may be larger than the effective diameter or effective area of the second surface S2 .
- the effective radius of the first lens 111 may be greater than the effective radius of the second to fifth lenses 112 , 113 , 114 , and 115 with respect to the optical axis. Accordingly, the amount of ambient light of the light focused by the image sensor 190 may be improved.
- the thickness of the first lens 111 on the optical axis Lz of the optical system ie, the central thickness, may be thicker than the central thickness of each of the second to fourth lenses 112, 113, and 114, and 1.5 mm or more, for example, 1.5 mm to 2 mm. can be a range.
- the first lens 111 may have a relatively thick thickness and a large effective diameter, and may refract the amount of incident light to focus the light onto the second lens 112 .
- the first lens 111 may provide side surfaces S11 and S12 in which the height direction (ie, Y) of the camera module is cut.
- the cut side surface may be any one or both sides of the first lens 111 in the first direction Y, and may provide a surface that is not parallel to the optical axis.
- the cut side surfaces S11 and S12 may be outer surfaces in which a portion of the effective mirror is cut in the optical axis direction from one side or both sides of the first lens 111 in the first direction Y.
- a part of the cut effective diameter may be one or both sides of the first surface S1, and one or both sides of the second surface S2 are cut with ribs or flanges without cutting the effective diameter.
- a portion of the cut effective diameter may be one or both sides of the second surface S2, and one or both sides of the first surface S1 may have ribs or flanges without cutting the effective diameter. can be cut.
- One of the first and second surfaces S1 and S2 of the first lens 111 may have a non-circular shape, and the other may have a circular shape.
- the first surface S1 may have a non-circular shape
- the second surface S2 may have a circular shape.
- the second surface S2 may have a non-circular shape
- the first surface S1 may have a circular shape.
- Any one or both of the first and second side surfaces S11 and S12 of the first lens 111 may have an inclination with respect to the optical axis. The slope may be the same as or different from the first and second side surfaces S11 and S12.
- the length A1 of the first direction (Y) of the object-side first surface (S1) in the first lens 111 is the second direction (X) may be smaller than the length (B2) of In the first lens 111
- the length A4 in the first direction Y of the sensor-side second surface S2 may be equal to or smaller than the length in the second direction X
- the second surface S2 may be larger than the effective diameter A3 of the , and may be the same as the diameter (eg, B2) of the first surface S1.
- the length A1 of the object-side first surface S1 in the first direction (Y) is the length of the effective diameter of the first surface (S1), and may be smaller than the length (B2) in the second direction (X).
- the length A4 of the sensor-side second surface S2 in the first and second directions Y and X may be the same as the length including the ribs.
- the effective diameter for the first and second directions (Y,X) of the object-side first surface S1 and the first and second directions (Y,X) of the sensor-side second surface S2 may not be the same length.
- the lengths A1 and A3 in the first direction Y are linear distances from the first and second surfaces S1 and S2 of the first lens 111 to the cut side surfaces S11 and S12.
- the length B2 in the second direction X may be the length of the effective diameter of the first lens 111 .
- the maximum length B1 in the second direction X of the side surfaces S11 and S12 cut from the first lens 111 may be smaller than the length B2 of the effective diameter of the first surface S1, It may be greater than the length A3 of the effective diameter of the two surfaces S2.
- a straight line in the first direction (Y) passing through the center (0) with respect to the center (O) of the first lens 111 and the angle from the first and second side surfaces (S11, S12) to the outer ends of the object side (Q1) may be 60 degrees or less, for example, in the range of 30 degrees to 60 degrees, or in the range of 30 degrees to 50 degrees.
- the angle Q1 may indicate a position where the first and second side surfaces S11 and S12 start from the object side surface of the first lens 111 .
- one end or both ends of the first surface S1 of the first lens 111 in the first direction Y is a boundary between the cut side surface and the first surface S1
- the second One end or both ends of the surface S2 in the first direction Y is a boundary between the cut side surface and the second surface S2.
- the boundary may be an edge in the first direction Y of the first and second surfaces S1 and S2.
- the first axis Z1 passing through one end of the first surface S1 of the first lens 111 and parallel to the optical axis may intersect the effective diameter area or the rib area of the second surface S2. have.
- the second axis Z2 passing through both ends of the inclined side surfaces S11 and S12 in the first lens 111 is the edge of the effective mirror of the first surface S1 and the second surface S2 in the first direction Y. ) may intersect with the effective diameter edge or rib edge. That is, when the effective diameter of the second surface S2 is smaller than the effective diameter of the first surface S1 , the second axis Z2 may intersect the ribs disposed outside the effective diameter of the second surface S2 .
- the angle R1 formed by each of the inclined side surfaces S11 and S12 of the first lens 111 is the angle of the second axis Z2 with respect to the first axis Z1 and is less than or equal to 10 degrees. , for example, in the range of 0.5 degrees to 10 degrees or in the range of 5 degrees to 10 degrees. If the angle R1 is greater than the above range, the lens height cannot be reduced, so that the height of the camera module increases. If the angle R1 is smaller than the above range, the effect of reducing flare is insignificant.
- the linear distance between the first side S11 and the second side S12 inclined on both sides in the first direction Y is the minimum distance (ie, A1) on the first side S1.
- the minimum distance from the first surface S1 may be a length A1 of the first surface S1 in the first direction Y, and the maximum distance from the second surface S2 may be the second surface S2.
- ) in the first and second directions (Y, X) may be a length A4.
- a boundary between the second surface S2 and the first and second side surfaces S11 and S12 may be an outer edge of the second surface S2. Accordingly, on the second surface S2 , the length in the first direction Y and the length A4 in the second direction X may be the same as each other.
- the cutting is performed from the outside of the effective diameter of the first surface S1 toward the outer edge of the second surface S2 . Accordingly, the cut portion of the second surface S2 may be minimized or absent.
- a portion of the first side surface S11 of the first lens 111 may overlap a rib area outside the effective mirror of the second surface S2 of the first lens 111 in the optical axis direction.
- a portion of the second side surface S12 may overlap a rib area outside the effective mirror of the second surface S2 of the first lens 111 in the optical axis direction.
- the length A1 of the effective diameter in the first direction Y of the object-side first surface S1 may be in the range of 4.5 mm or more, for example, 4.5 mm to 5.5 mm, and in the second direction.
- the length (B2) of the effective diameter of (X) may be 5 mm or more, for example, in the range of 5 mm to 6 mm.
- the effective diameter length A3 in the first and second directions Y and X of the sensor-side second surface S2 of the first lens 111 may be 4.1 mm or more, for example, in the range of 4.1 mm to 5.2 mm.
- the second lens 112 may have negative (-) refractive power.
- the second lens 112 may include a plastic material.
- the second lens 112 may include a third surface S3 defined as an object-side surface and a fourth surface S4 defined as a sensor-side surface.
- the third surface S3 may be an incident surface, and the fourth surface S4 may be an exit surface.
- the third surface S3 may be concave toward the sensor and the fourth surface S4 may be concave toward the object. At least one or both of the third surface S3 and the fourth surface S4 may be aspherical.
- the thickness of the second lens 112 on the optical axis Lz may be smaller than the thickness of the first and third lenses 111 and 113, and may be 0.6 mm or less, for example, 0.1 mm to 0.5 mm.
- the second lens 112 may be provided with the thinnest thickness in the lens unit 110 .
- the third lens 113 may have a positive (+) refractive power.
- a refractive power value of the third lens 113 may be greater than a refractive power value of the first lens 111 .
- the third lens 113 may include a glass or plastic material.
- the third lens 113 may include a fifth surface S5 defined as an object-side surface and a sixth surface S6 defined as a sensor-side surface.
- the fifth surface S5 may be an incident surface, and the sixth surface S6 may be an exit surface.
- the fifth surface S5 may be convex toward the object and the sixth surface S6 may be convex toward the sensor. At least one or both of the fifth surface S5 and the sixth surface S6 may be aspherical.
- the thickness of the third lens 113 on the optical axis Lz may be greater than the thickness of the second and fourth lenses 111 and 114, and may be in the range of 1.2 mm or more, for example, 1.2 mm to 1.6 mm.
- a thickness of the third lens 113 may be thinner than a thickness of the first lens 111 , and a thickness difference between the first and second lenses 111 and 112 may be 0.5 mm or less.
- the third lens 113 may receive the light diffused on the concave fourth surface S4 of the second lens 112 and condense the light through the convex fifth surface S5 and the sixth surface S6. have.
- the fourth lens 114 may have a negative refractive power.
- the fourth lens 114 may include a glass or plastic material.
- the fourth lens 114 may include a seventh surface S7 defined as an object-side surface and an eighth surface S8 defined as a sensor-side surface.
- the seventh surface S7 may be an incident surface, and the eighth surface S8 may be an exit surface.
- the seventh surface S7 may be concave toward the sensor and the eighth surface S8 may be concave toward the object. At least one or both of the seventh surface S7 and the eighth surface S8 may be aspherical.
- the thickness of the fourth lens 114 on the optical axis Lz may be smaller than the thickness of the third and fifth lenses 113 and 115, and may be 1 mm or less, for example, 0.2 mm to 0.9 mm.
- a thickness of the fourth lens 114 may be greater than a thickness of the second lens 114 , and a thickness difference with the third lens 113 may be 0.9 mm or more.
- the fourth lens 114 receives the light condensed by the convex sixth surface S6 of the third lens 113, and receives the incident light from the concave seventh and eighth surfaces S7 and S8. It can be refracted so that it diffuses through it.
- the fifth lens 115 may have positive (+) refractive power.
- the refractive power value of the fifth lens 115 may be smaller than the refractive power value of the first lens 111 .
- the fifth lens 115 may include a plastic material.
- the fifth lens 115 may include a ninth surface S9 defined as an object-side surface and a tenth surface S10 defined as a sensor-side surface.
- the ninth surface S9 may be an incident surface, and the tenth surface S10 may be an exit surface.
- the ninth surface S9 may be convex toward the sensor and the tenth surface S10 may be convex toward the sensor. At least one or both of the ninth surface S9 and the tenth surface S10 may be aspherical.
- the thickness of the fifth lens 115 on the optical axis Lz may be greater than the thickness of the fourth lens 114, and may be 1.5 mm or less, for example, 1.5 mm to 2 mm.
- the fifth lens 115 may have the same thickness as that of the first lens 111 or a thickness difference of 0.2 mm or less.
- the fifth lens 115 may refract the light diffused by the concave eighth surface S8 of the fourth lens 114 through the concave ninth surface S9 and the convex tenth surface S10 .
- the sixth lens 116 is disposed between the fifth lens 115 and the image sensor 190, may be larger than the effective diameter of the first lens 111, and may be a lens having the largest diameter in the optical system. .
- the sixth lens 116 may have a radius of curvature between the object side surface and the sensor side surface greater than that of the first to fifth lenses 111 , 112 , 113 , 114 and 115 , and may be the largest among lenses in the optical system.
- the thickness of the sixth lens 116 may be thinner than the central thickness of the second lens 112 and may be 0.25 mm or less.
- the sixth lens 116 may be made of a glass material or a plastic material.
- the sixth lens 116 may be positioned closer to the image sensor 190 than the fifth lens 115 .
- the sixth lens 116 may be moved together with the fifth lens 115 in the optical axis direction Z.
- the sixth lens 116 may be removed in the optical system.
- the sixth lens 116 may provide a surface in which the height direction (ie, Y) of the camera module is cut.
- the cut surface may be any one or both of both sides of the sixth lens 116 in the first direction Y, and may provide a surface parallel to the optical axis.
- the cut surface may be a surface in which a portion of the effective diameter is cut from one side or both sides of the sixth lens 116 in the first direction Y toward the optical axis direction.
- a portion of the effective diameter cut by the sixth lens 116 may be on one or both sides of the object-side surface, and may be on one or both sides of the sensor-side surface in the first direction.
- the sixth lens 116 may be a lens closest to the image sensor, and the length of the object-side surface in the first direction (Y) may be different from the length in the second direction (X). In the sixth lens 116 , the length of the sensor-side surface in the first direction (Y) may be different from the length in the second direction (X). In the sixth lens 116 , the length of the object-side surface in the first direction (Y) may be smaller than the length in the second direction (X). In the sixth lens 116 , the length of the sensor-side surface in the first direction (Y) may be smaller than the length in the second direction (X).
- the sixth lens 116 may have the same length in the first direction (Y) of the object-side surface and the length in the first direction (Y) of the sensor-side surface.
- the length of the first direction (Y) and the length of the second direction (X) may be the length of the effective diameter of the sixth lens 116 .
- the length in the first direction (Y) of the object-side surface may be in the range of 4.5 mm or more, for example, 4.5 mm to 5.5 mm
- the length in the second direction (X) is 5.5 mm or more, for example, in the range of 4.5 mm or more.
- the length in the first direction (Y) of the sensor-side surface may be in the range of 4.5 mm or more, for example, 4.5 mm to 5.5 mm
- the length in the second direction (X) is 5.6 mm or more, for example, in the range of 4.5 mm or more.
- the lengths in the second direction (X) of the object-side surface and the sensor-side surface of the sixth lens 116 are the second lengths of the first surface S1 and the second surface S2 of the first lens 111 . It may be greater than the length of the direction (X).
- the length in the first direction (Y) of the object-side surface of the sixth lens 116 is the length in the first direction (Y) of the first surface S1 and the second surface S2 of the first lens 111 .
- the sixth lens 116 may have sides inclined or inclined with respect to the optical axis on one side or both sides of the first direction Y, and the angles of the inclined and inclined sides are 5 degrees to 10 degrees. can be a range.
- the distance between the first lens 111 and the second lens 112 on the optical axis may be the largest among the distances between the two adjacent lenses, and may be 1.5 mm or more, for example, 1.5 mm to 3 mm. have.
- the distance between the first and second lenses 111 and 112 is a distance at which light reflected by the inclined side surfaces S11 and S12 of the first lens 111 is not incident on the effective area of the second lens 112 .
- the distance between the first lens 111 and the second lens 112 may be greater than the central thickness of the first lens 111, and is 1.2 times or more of the central thickness of the first lens 111. For example, It may range from 1.2 to 1.8 times.
- the distance between the second lens 112 and the third lens 113 may be the smallest among the distances between the two adjacent lenses, and may be 0.05 mm or less, for example, in the range of 0.05 mm to 1.2 mm.
- a distance between the second lens 112 and the third lens 113 may be smaller than a center thickness of the second lens 112 .
- the minimum distance between the third lens 113 and the fourth lens 114 may be the second smallest distance between two adjacent lenses, and may be 0.6 mm or less, for example, in the range of 0.35 mm to 0.6 mm. .
- a distance between the third lens 113 and the fourth lens 114 may be greater than a distance between the second lens 112 and the third lens 113 .
- the distance between the fourth lens 114 and the fifth lens 115 may be the second largest between the two adjacent lenses, and may be 0.55 mm or more, for example, 0.55 mm to 0.85 mm.
- a distance between the fourth lens 114 and the fifth lens 115 may be greater than a minimum distance between the third lens 113 and the fourth lens 114 .
- the focal length of the first lens 111 has a positive value, and may be 7 mm or more, for example, 7 mm to 13 mm.
- the focal length of the second lens 112 has a negative value, and may be -3 mm or less, for example, in the range of -3 mm to -7 mm.
- the focal length of the third lens 113 has a positive value and may be 5 mm or less, for example, 1 mm to 5 mm.
- the focal length of the fourth lens 114 has a negative value, and may be -1 mm or less, for example, -1 mm to -5.5 mm.
- the focal length of the fifth lens 115 has a positive value, and may be 10 mm or more, for example, 10 mm to 16 mm. When an absolute value is taken, the focal length of the fifth lens 115 may be the largest among the focal lengths of the lenses.
- the optical filter 192 may include an optical filter such as an infrared filter.
- the optical filter 192 may pass light of a set wavelength band and filter light of a different wavelength band.
- the optical filter 192 may block radiant heat emitted from external light from being transmitted to the image sensor 190 .
- the optical filter 192 may transmit visible light and reflect infrared light.
- the image sensor 190 may detect the light passing through the optical filter 192 .
- the image sensor 190 may include a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).
- CCD charge coupled device
- CMOS complementary metal oxide semiconductor
- At least one first lens 111 of the plurality of lenses 111 , 112 , 113 , 114 , and 115 may include side surfaces S11 and S12 in which both sides or one side in the first direction Y are inclined.
- any one lens 111 closest to the object side and one lens 116 closest to the sensor among the plurality of lenses 111, 112, 113, 114, 115, 116 may each include an inclined side on either side or one side in the first direction (Y). have.
- one or a plurality of lenses having cut sides may be disposed in the optical system.
- the at least one lens having the cut side surface may include inclined side surfaces S11 and S12 on one side or both sides of the first direction Y, respectively.
- the at least one first lens 111 having the side surfaces S11 and S12 is inclined from the effective area of the object-side surface to the effective area of the sensor-side surface in one or both sides of the first direction Y. It may include at least one of a surface inclined from the effective area of the side surface to the rib area of the sensor side, or a surface inclined from the rib area of the object-side surface to the effective area of the sensor surface. That is, the effective area of at least one of the object-side surface and the sensor-side surface of the at least one lens may be obliquely cut.
- the inclined side surfaces S11 and S12 of the first lens 111 may have an outer edge S111 in the second direction X in a curved shape.
- the inclined side surfaces S11 and S12 of the first lens 111 may gradually decrease in width in the second direction X from the object-side first surface S1 to the second surface S2. 4 and 6 (B), the outer surface (S10) of the first lens 111 is provided as a surface perpendicular to the optical axis direction (Z), except for the inclined side (S11, S12), or , the ribs may be arranged in multiple stages.
- At least the first lens 111 of the plurality of lenses has a length A1 in the first direction (Y) of the first surface (S1) and a length in the first direction (Y) of the second surface (S2).
- the length A1 of the first surface S1 in the first direction Y may be shorter than the length B2 of the first surface S1 in the second direction X. Accordingly, since the path of the light reflected through the inclined side surfaces S11 and S12 of the first lens 111 is changed, it is prevented from proceeding toward the image sensor 190 and the size of unnecessary light incident on the image sensor 190 is changed. can be minimized.
- the side surface Sa1 may be provided as a side surface parallel to the optical axis.
- the light reflected by the inclined side surface Sa2 of the object-side lens 153 in the two adjacent lenses 153 and 154 is outside the effective area (eg, the lower area) of the sensor-side lens 154 . ), no clutter is formed on the image sensor.
- the side surface Sa2 may be provided as an inclined side surface (eg, S11 and S12 in FIG. 2 ) that is not parallel to the optical axis, for example, the angle Rb of the inclined side surface is 10 degrees with respect to the optical axis as shown in FIG. 24 .
- the angle Rb of the inclined side surface is 10 degrees with respect to the optical axis as shown in FIG. 24 .
- it may be in the range of 0.5 degrees to 10 degrees or in the range of 5 degrees to 10 degrees.
- the length in the first direction must be smaller than that of the sensor-side surface of the object-side surface. As shown in (C) of FIG.
- the side surface Sa3 may be provided as an inclined side surface that is not parallel to the optical axis.
- the angle Ra of the inclined side surface is 10 degrees or less with respect to the optical axis, for example, 0.5 degrees to 10 degrees, or It may range from 5 degrees to 10 degrees.
- the sensor-side surface is smaller than the object-side surface in the first direction, and the object-side surface and the sensor-side surface have a length in the first direction.
- the difference in length may be greater than the length of the two sides shown in FIG. 21B .
- the angle Ra with respect to the optical axis is a positive (+) angle
- the angle Rb may be a negative (-) angle.
- the angle of the inclined side surface of the first lens may be in the range of 5 degrees to 10 degrees or -5 degrees to 10 degrees with respect to the optical axis.
- Table 1 shows the flare positions in the image sensor according to the inclined cutting angle of the side surface of the first lens.
- 26 shows a region or position where the flare is formed on the image sensor according to the cutting angle of the lens.
- Table 1 shows this in a table.
- the cut positive angle is the angle Ra with respect to the optical axis
- the negative angle is the angle Rb with respect to the optical axis.
- A11 is the size of the flare F1 on the image sensor 190, and it can be seen that the flare is reduced or removed as the absolute value of the angle of the cut side increases.
- the height of the camera module increases according to Table 2. Therefore, considering both the flare removal effect and the height of the lens, it is most appropriate for the angle of the cut side to be in the range of 5 degrees to 10 degrees or -10 degrees to -5 degrees with respect to the optical axis. In this case, as the cut angle (absolute value) increases, the height of the first lens to reduce flare may be increased as shown in Table 2.
- the length of the sensor side surface in the first direction Y by the angle R1 of the cut side surfaces S11 and S12 is the object side. Since the surface is cut longer than the length in the first direction (Y), it is possible to reduce the difference in length between the object-side surface and the sensor-side surface in the first direction (Y), minimize the cutting area of the effective area, and reduce the height of the lens. have. Comparing the size of the stray light of the invention of Fig. 27 (A) with the comparative example of Fig.
- the effective diameter of the third surface S3 of the second lens 112 is the effective diameter of the first surface S1 (ie, B2). ), may be less than or equal to 4 mm or may be in the range of 4.5 mm to 5 mm, and may be equal to or greater than the effective diameter of the fourth surface S4.
- the effective diameter of the fourth surface S4 may be 4 mm or less, for example, in the range of 4.5 mm to 4 mm.
- the effective diameters of the fifth and sixth surfaces S5 and S6 of the third lens 113 may be larger than the effective diameters of the third and fourth surfaces S3 and S4 of the second lens 112 .
- the effective diameter of the fifth surface S5 may be equal to or greater than the effective diameter of the sixth surface S6, and may be 4.2 mm or less, for example, in the range of 3.7 mm to 4.2 mm.
- the effective diameter of the sixth surface S7 may be in the range of 4.17 mm or less, for example, 3.7 mm to 4.17 mm.
- the effective diameters of the seventh and eighth surfaces S5 and S6 of the fourth lens 114 may be smaller than the effective diameters of the fifth and sixth surfaces S7 and S8 of the third lens 113 .
- the effective diameter of the seventh surface S7 may be equal to or larger than the effective diameter of the eighth surface S8, and may be 3.3 mm or less, for example, in the range of 2.9 mm to 3.1 mm.
- the effective diameter of the eighth surface S8 may be 3.27 mm or less, for example, in the range of 2.85 mm to 3.27 mm.
- the effective diameters of the ninth and tenth surfaces S9 and S10 of the fifth lens 115 may be larger than the effective diameters of the seventh and eighth surfaces S7 and S8 of the fourth lens 114 .
- the effective diameter of the ninth surface S9 may be smaller than the effective diameter of the tenth surface S10, and may be 3.5 mm or less, for example, in the range of 2.8 mm to 3.5 mm.
- the effective diameter of the tenth surface S10 may be 4.2 mm or less, for example, in the range of 3.7 mm to 4.2 mm.
- the tenth surface S10 may diffuse the light incident through the ninth surface S9 to uniformly irradiate the light from the center to the peripheral area of the image sensor 190 through the optical filter 192 .
- the first lens 111 has a lower refractive index than that of the second lens 112, and may be less than 1.6.
- the second lens 112 has a higher refractive index than that of the first lens 111 , and may be 1.57 or more.
- the third and fourth lenses 113 and 114 have a lower refractive index than that of the second lens 112 , and a difference between the two refractive indices may be at most 0.1 or less.
- the fifth lens 115 may have a higher refractive index than that of the fourth lens 114 , and may be 1.6 or more, for example, 1.65 or more.
- the fifth lens 115 has a refractive index higher than the refractive indices of the first to fourth lenses 111 , 112 , 113 , and 114 , and thus can effectively refract light.
- the Abbe number of the first lens 111 is greater than the Abbe number of the second lens 112, for example, 1.7 times or more.
- the Abbe's number of the second lens 112 may be smaller than the Abbe's number of the first lens 111 and the third lens 113 , and may be, for example, 30 or less.
- the Abbe's number of the third lens 113 may be 50 or more.
- the Abbe's number of the first, third, and fourth lenses 111 , 113 , and 114 may be 50 or more, and may be equal to each other.
- the difference in Abbe's number between the third lens 113 and the fourth lens 114 may be no or less than 5.
- the Abbe's number of the fifth lens 115 may be smaller than the Abbe's number of the fourth lens 114 , and a difference from the Abbe's number of the second lens 112 may be 10 or less.
- the Abbe's number of the second lens 112 may be the smallest among the lenses of the optical system, and may be smaller than the Abbe's number of the second lens 112 and may be 25 or less.
- Abbe's numbers in the lenses 111 , 112 , 113 , 114 and 115 decrease when the refractive index of the lenses increases. If the Abbe number is small, color dispersion is effective, and when the Abbe number is large, color dispersion may occur less. When the Abbe's number in the lenses 111, 112, 113, 114, and 115 is high, chromatic aberration may be small and transparency may be improved.
- the half angle of view may be 12 degrees or less, for example, 5 degrees to 12 degrees.
- the distance from the center of the image sensor 190 to the end in the diagonal direction may be 3 mm or less, for example, 2 mm to 3 mm.
- the wavelength of the light beam used in the optical system may be in the range of 870 nm to 1000 nm.
- the MTF degradation may be 10% or less in a temperature range from a low temperature (eg -40 degrees C) to a high temperature (eg 85 degrees C).
- the material of the lens barrel or the lens holder supporting the lenses may be a metal material, for example, a metal having high heat dissipation characteristics. Accordingly, even when a plastic lens is used in the optical system, a decrease in heat dissipation efficiency can be prevented.
- Table 3 shows the lens characteristics of the optical system according to the embodiment of the present invention.
- first embodiment noodle # Surface type Thickness/ Interval Index Abbe# first lens S1 ASP 1.80 1.52 56.0 S2 ASP 1.5 second lens S3 ASP 0.30 1.61 25.9 S4 ASP 0.10 third lens S5 ASP 0.140 1.53 56.0 S6 ASP 0.43 4th lens S7 ASP 0.46 1.52 56.0 S8 ASP 0.74 5th lens S9 ASP 1.80 1.66 20.4 S10 ASP 4.2 filter FS1 SPH 0.110 1.52 64.20 FS2 SPH 0.452 image sensor Image SPH 0.000
- the ASP indicates an aspherical surface
- the thickness indicates the thickness (unit, mm) of each lens on the optical axis
- the interval indicates the spacing between two lenses aligned on the optical axis. (unit, mm) is indicated.
- the thickness of the FS1 is the thickness of the filter. 7 to 13 are modified examples of the first lens.
- the inclined side surfaces S11 and S12 of the first lens 111A may have the same maximum length as the effective diameter of the first surface S1 in the second direction X,
- the second direction outer edge S111 of the inclined side surfaces S11 and S12 may extend from the edge of the first surface S1 to the edge of the second surface S2 in a curved manner.
- the inclined side surfaces S11 and S12 of the first lens have a maximum length in the second direction X that is smaller than the effective diameter of the first surface S1, and the inclined side surfaces S11, S12,
- the second direction outer edge S111 of S12 may extend from the edge of the first surface S1 to the inside edge of the second surface S2 (ie, a position close to the center of the inclined side surface) in a curved manner.
- the maximum linear distance in the optical axis direction may be equal to or shorter than the height of the outer side surface S10 of the first lens 111 .
- the inclined side surfaces S11 and S12 of the first lens 111B when viewed from the first direction Y, the inclined side surfaces S11 and S12 of the first lens 111B, for example, a plurality of regions S11A, S11B, and S11C, have at least two or more regions S11A, S11B, and S11C. It may be formed separately, and each of the regions S11A, S11B, and S11C may have outer edges S113, S114, and S115 in a hemispherical shape.
- the outer edges S113, S114, and S115 are curved from the edge of the first surface S1 to the edge of the second surface S2, or from the edge of the first surface S1 to the second surface S2. It can be placed inside the edge (ie, close to the center of the beveled side).
- the inclined side surfaces S11 and S12 of the first lens 111C may be formed such that at least two or more, for example, a plurality of regions are connected to each other when viewed from the first direction Y,
- the edges S113 , S114 , and S115 of the regions connected to each other may be formed in a shape in which hemispherical shapes overlap.
- the outer edges S113, S114, and S115 are curved from the edge of the first surface S1 to the edge of the second surface S2, or from the edge of the first surface S1 to the second surface S2. It can be placed inside the edge (closer to the center of the beveled side).
- the inclined side surfaces S11 and S12 of the first lens 111D may have a maximum length in the second direction X that is smaller than the effective diameter of the first surface S1, and the inclined side surfaces S11, S12,
- the length of the second direction X of S12 may be the minimum at the edge of the first surface S1 and the maximum at the edge of the second surface S2 .
- the effective area of both the first and second surfaces S1 and S2 may be cut, and may be cut at the inclined angle Ra of FIG. 24 .
- the second direction outer edges S117 and S118 of the inclined side surfaces S11 and S12 are edges of the cut side and may be connected from the edge of the second surface S2 to the edge of the first surface S1.
- the inclined side surfaces S11 and S12 of the first lens 111D may have a maximum length equal to the diameter of the second surface S2 in the second direction X, and the inclined side surfaces S11, S12,
- the length of the second direction X of S12 may be the minimum at the edge of the first surface S1 and the maximum at the edge of the second surface S2 .
- the effective area of both the first and second surfaces S1 and S2 may be cut, and may be cut at the inclined angle Ra of FIG. 24 .
- the second direction outer edges S117A and S118A of the inclined side surfaces S11 and S12 are edges of the cut side and may be connected from the edge of the second surface S2 to the edge of the first surface S1.
- the area, size, or shape of the inclined first side surface S11 and the second side surface S12 may be different with respect to the first lens.
- the area of the first side surface S11 and the area of the second side surface S12 are different examples, and the area of the first side surface S11 is the second side surface S12 ) may be smaller than the area of As shown in (A) (B) of Figure 13, the shape or / and area of the first side (S11) and the second side (S12) are different, and the inflection point of the curve of the second side (S12) is the first side (S11) ) may have more curves than inflection points.
- the area of the second side surface S12 may be larger than the area of the first side surface S11 .
- 14(A) is a case in which the first lens of the comparative example has a flat side surface SF1
- (B) is a case in which the first lens of the present invention has inclined side surfaces S11 and S12.
- 14(A)(B) the angle ⁇ 1 incident on the first surface, the incident and reflection angles ⁇ 2 and ⁇ 5 on the side surfaces SF1, S11, S12, and the emission angle from the second surface S2 Comparing ( ⁇ 4, ⁇ 6) is shown in Table 4.
- the angle ⁇ 6 when the angle ⁇ 5 is reflected by the inclined side surfaces S11 and S12 of the first lens 111 and is emitted at an angle ⁇ 6 through the second surface S2, the angle ⁇ 6 emitted is In order to travel out of the effective range of other lenses, the angle ⁇ 6 always travels out of the effective range when it is a positive (+) angle. It has a great removal effect.
- Table 3 is an example in which the inclined side surfaces S11 and S12 are measured at an angle of 7.5.
- 15 to 17 are views illustrating another example of the first lens of FIG. 2 .
- the first lens 121 may include side surfaces S21 and S22 inclined with respect to an axis parallel to the optical axis Lz.
- the inclined side surfaces S21 and S22 may be inclined at a predetermined angle R11 with respect to an axis parallel to the optical axis.
- the angle R11 may be 10 degrees or less, for example, in the range of 0.5 to 10 degrees, or in the range of 5 to 10 degrees.
- the first and second directions (Y,X) lengths B2 of the first surface S1 of the first lens 121 are equal to each other, and the first and second directions (Y,X) of the second surface S2 ( Y, X) lengths A11 and A4 may be different from each other.
- the first direction length A11 of the second surface S2 may be smaller than the second direction length A4, and the length B2 of the first surface S1 in the first and second directions Y and X. may be smaller than
- the angle ( Q2) covers a half region of length B11, and may be less than or equal to 60 degrees, such as in the range of 30 degrees to 60 degrees or in the range of 30 degrees to 50 degrees.
- the angle Q2 indicates a position where the first and second sides S11 and S12 start from the sensor side of the first lens. 17, the first and second side surfaces S21 and S22 are cut obliquely from the edge of the second surface S2 toward the edge of the first surface S1, and the edge S121 is to be formed in a curved shape.
- the maximum linear distance (optical axis direction distance) from the first surface S1 to the second surface S2 may be equal to or smaller than the height of the outer surface S10 of the first lens 121 .
- the first and second side surfaces S21 and S22 of the first lens 121 have a maximum distance in the second direction (X) from the edge of the second surface S2, and the first surface It may be the minimum distance from the edge of (S1).
- the maximum distance in the second direction X may be equal to or smaller than the diameter of the first lens 121 .
- the first surface S1 of the first lens 131 may be convex
- the second surface S2A may be convex, and may include an aspherical surface.
- the side surfaces S31 and S32 disposed on both sides of the first lens 131 in the first direction Y and inclined from the first surface S1 to the second surface S2A of the first lens 131 have a predetermined angle. (R31).
- the angle R31 may be 10 degrees or less, for example, in the range of 0.5 to 10 degrees, or in the range of 5 to 10 degrees. When the angle R31 is greater than the above range, the height of the camera module increases, and when the angle R31 is smaller than the above range, the effect of reducing flare is insignificant.
- 22 illustrates examples of lines cut on one side or both sides of the first lens 111 in the first direction (Y) in the present invention. 22 , when the outer rib F10 of the first lens 111 is connected to the outside of the effective area of the first and second surfaces S1 and S2, the first cutting line C1 is connected to the first surface S1 ) is cut toward the rib of the second surface S2, and the second cutting line C2 is cut toward the rib of the second surface S2 at the boundary between the effective area of the first surface S1 and the rib
- the third cutting line C3 may be cut from the effective area of the first surface S1 to the boundary between the effective area of the second surface S2 and the rib.
- the fourth cutting line C4 is cut from the effective area of the second surface S2 toward the rib of the first surface S1
- the fifth cutting line C5 is the effective area of the second surface S2
- the sixth cutting line C6 is formed between the effective area of the first surface S1 and the rib in the effective area of the second surface S2. It can be cut to the border.
- at least one of the first and second surfaces S1 and S2 has lines C1, C3, C4, and C6 in which an effective area is cut. It may be provided laterally.
- the inclination angle of the cut lines may be 10 degrees or less with respect to the optical axis, for example, in the range of 0.5 to 10 degrees or in the range of 5 to 10 degrees. If it is small, the effect of reducing flare is insignificant.
- the angle of the inclined side is a positive value, and when the cutting line is located on the outside, the angle of the inclined side can be divided into a negative value.
- the first lens 111 The angle of the side cut by the cut line C1, C3, C4, C6 may be in the range of 5 degrees to 10 degrees or -10 degrees to -5 degrees with respect to the optical axis.
- the length A1 in the first direction (Y) of the object-side first surface S1 is the length in the second direction (X) ( It may be smaller than B2).
- the length A2 in the first direction Y of the sensor-side second surface S2 may be smaller than the length A4 in the second direction X, and the second surface S2 ) may be the same as or larger than the effective diameter of the first surface S1, and may be smaller than the diameter (eg, B2) of the first surface S1.
- the length A1 of the object-side first surface S1 in the first direction Y is less than or equal to the length of the effective diameter of the first surface S1, and is greater than the length B2 in the second direction X.
- Lengths A2 and A4 of the sensor-side second surface S2 in the first and second directions Y and X are lengths including ribs, and may have a relationship of length A4>A2>A1.
- the effective diameter in the first and second directions (Y,X) of the object-side first surface S1 and in the first and second directions (Y,X) of the sensor-side second surface S2 may not be the same length.
- the lengths A1 and A2 in the first direction Y are the minimum linear distances between the side surfaces S11 and S12 cut on the first and second surfaces S1 and S2 of the first lens 141 . to be.
- the lengths B1 and B2 in the second direction X may have a relationship of length B2>B1, and the length B1 is the minimum length in the second direction X.
- a straight line in the first direction (Y) passing through the center (0) with respect to the center (O) of the first lens 141 and a first angle (Q1) to one end of the object side of the first side surface (S11) may be greater than the second angle Q3 between the straight line in the first direction Y and one end of the sensor side of the first side, and be 60 degrees or less, for example, in the range of 30 degrees to 60 degrees or in the range of 30 degrees to 50 degrees.
- the second angle Q3 may be 45 degrees or less, for example, 30 degrees to 45 degrees.
- the first and second angles Q1 and Q3 may indicate positions where the first and second sides S11 and S12 start on the object side or the sensor side of the first lens 141 . As shown in FIG.
- the first lenses 111 and 121 closest to the prism 101 are provided as side surfaces inclined to one side or both sides in the first direction, and the lens unit 110A having four or more lenses is provided to the first lenses 111 and 121 . and the image sensor 190 .
- a camera module 711 having an optical system may be coupled in a case 700 of a mobile terminal.
- a plurality of lens modules 712 , 732 , and 752 are arranged in a first direction and/or a second direction, and at least one or all of the lens modules 711 may be vertically upward or downward.
- a ToF lens module 772 may be added or a camera flash module may be further disposed within the camera module 711 , but the present disclosure is not limited thereto.
- a part of the camera module may protrude from the case 700 of the terminal.
- the optical system according to an embodiment of the present invention may reduce the height of the camera module by cutting a part of the first lens 111 .
- the optical system may change the light incident in a direction perpendicular to the surface of the terminal or the movable body applied including the reflective member 101 in a direction parallel to the surface of the movable body. Accordingly, the optical system including the plurality of lenses may have a thinner thickness in the terminal or the movable body, and thus the terminal or the movable body may be provided thinner.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Lenses (AREA)
- Lens Barrels (AREA)
- Cameras In General (AREA)
- Prostheses (AREA)
Abstract
Description
| 플레어의 위치\커팅된 각도 | -7.5 | -5 | -2.5 | 0 | 2.5 | 5 | 7.5 |
| | Max | | 1.5 | 3 | 3 | 3 | 3 | ||
| | Min | | 1 | 1.3 | 2 | 2.3 | 2.7 |
| 커팅된 측면 각도 | 모듈 높이의 증가 값(mm) |
| | 5 | | 0.17 |
| | 10 | | 0.35 |
| | 15 | | 0.54 |
| | 20 | | 0.73 |
| | 25 | | 0.93 |
| 제1실시예 | 면 # | Surface type | Thickness/ Interval |
Index | Abbe# |
| 제1 렌즈 | S1 | ASP | 1.80 | 1.52 | 56.0 |
| S2 | ASP | 1.5 | |||
| 제2 렌즈 | S3 | ASP | 0.30 | 1.61 | 25.9 |
| S4 | ASP | 0.10 | |||
| 제3 렌즈 | S5 | ASP | 0.140 | 1.53 | 56.0 |
| S6 | ASP | 0.43 | |||
| 제4 렌즈 | S7 | ASP | 0.46 | 1.52 | 56.0 |
| S8 | ASP | 0.74 | |||
| 제5 렌즈 | S9 | ASP | 1.80 | 1.66 | 20.4 |
| S10 | ASP | 4.2 | |||
| 필터 | FS1 | SPH | 0.110 | 1.52 | 64.20 |
| FS2 | SPH | 0.452 | |||
| 이미지센서 | Image | SPH | 0.000 |
| SF1 | θ1 | θ2 | θ3 | θ4 |
| 각도분포 | 0 ~ 30 | ~ -15 | -15 ~ 0 | 15 ~ 0 |
| S11(S12) | θ1 | θ2 | θ5 | θ6 |
| 각도분포 | 0 ~ 30 | 0 ~ 15 | 15 ~ 0 | -5 ~ 5 |
Claims (10)
- 물체측에서 센서측 방향으로 배열된 복수개의 렌즈를 포함하며,상기 복수개의 렌즈 중 적어도 하나의 제1렌즈는 물체측 면인 제1면 및 센서측 면인 제2면을 포함하며,상기 제1면의 제1방향 길이는 상기 제2면의 상기 제1방향 길이와 다르고,상기 제1면의 상기 제1방향 길이는 상기 제1면의 제2방향 길이보다 짧으며,상기 제1방향은 상기 렌즈들의 광축과 직교하며,상기 제2방향은 상기 제1방향과 상기 광축과 직교하는, 광학계.
- 제1항에 있어서, 상기 제1렌즈는 상기 복수의 렌즈 중 물체측에 가장 가까운 렌즈인, 광학계.
- 제1항에 있어서, 상기 제1렌즈는 상기 복수의 렌즈 중 센서측에 가장 가까운 렌즈인, 광학계.
- 제1항 내지 제3항 중 어느 한 항에 있어서, 상기 제1면의 제1방향 길이는 상기 제2면의 제1방향 길이보다 짧은, 광학계.
- 제4항에 있어서, 상기 제1렌즈는 상기 제1방향 양측에 제1측면 및 제2측면을 포함하며,상기 제1측면 및 상기 제2측면 중 적어도 하나는 광축에 대해 기울기를 갖는, 광학계.
- 제5항에 있어서, 상기 제1측면 및 상기 제2 측면 중 적어도 하나와 상기 광축 사이의 각도는 5도 내지 10도인 광학계.
- 제5항에 있어서, 상기 제1측면과 상기 제2측면의 기울기는 서로 동일한, 광학계.
- 제1항 내지 제3항 중 어느 한 항에 있어서, 상기 제1면의 제2방향 길이는 상기 제2면의 제1방향 길이와 같은, 광학계.
- 제1항 내지 제3항 중 어느 한 항에 있어서, 상기 제1면의 제1방향 길이는 상기 제2면의 제1방향 길이보다 긴, 광학계.
- 제1항 내지 제3항 중 어느 한 항에 있어서, 상기 제1면의 곡률반경은 상기 제2면의 곡률반경보다 큰 광학계.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2023552136A JP2024508478A (ja) | 2021-02-26 | 2022-02-25 | 光学系及びこれを備えたカメラモジュール |
| CN202280017229.9A CN116917788A (zh) | 2021-02-26 | 2022-02-25 | 光学系统及包括该光学系统的摄像装置模块 |
| US18/548,121 US20240151938A1 (en) | 2021-02-26 | 2022-02-25 | Optical system and camera module comprising same |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2021-0026940 | 2021-02-26 | ||
| KR1020210026940A KR20220122383A (ko) | 2021-02-26 | 2021-02-26 | 광학계 및 이를 구비한 카메라 모듈 |
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|---|---|
| WO2022182192A1 true WO2022182192A1 (ko) | 2022-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/KR2022/002777 Ceased WO2022182192A1 (ko) | 2021-02-26 | 2022-02-25 | 광학계 및 이를 구비한 카메라 모듈 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20240151938A1 (ko) |
| JP (1) | JP2024508478A (ko) |
| KR (1) | KR20220122383A (ko) |
| CN (1) | CN116917788A (ko) |
| TW (1) | TW202248711A (ko) |
| WO (1) | WO2022182192A1 (ko) |
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| CN119472043B (zh) * | 2024-12-03 | 2025-09-02 | 歌尔光学科技有限公司 | 光学模组以及近眼显示设备 |
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| JP2000019373A (ja) * | 1998-07-03 | 2000-01-21 | Olympus Optical Co Ltd | 対物レンズ |
| JP2006267391A (ja) * | 2005-03-23 | 2006-10-05 | Mitsubishi Electric Corp | 撮像装置 |
| US20120229916A1 (en) * | 2011-03-11 | 2012-09-13 | Sharp Kabushiki Kaisha | Optical element, optical element module, electronic element module, and electronic information device |
| KR20160103541A (ko) * | 2015-02-24 | 2016-09-01 | 주식회사 마부치코리아 | 결상용 렌즈 어레이 광학계 및 이를 포함한 촬영 장치 |
| KR102108199B1 (ko) * | 2017-12-12 | 2020-05-08 | 삼성전기주식회사 | 렌즈 조립체 및 이를 포함하는 카메라 모듈 |
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| JP2011138047A (ja) * | 2009-12-28 | 2011-07-14 | Olympus Imaging Corp | 光路反射型のズームレンズを備えた撮像装置 |
| JP2013003180A (ja) * | 2011-06-13 | 2013-01-07 | Hoya Corp | レンズユニット |
| JP2013095034A (ja) * | 2011-10-31 | 2013-05-20 | Sanyo Electric Co Ltd | レンズの製造方法、レンズおよび光学装置 |
| JP6061830B2 (ja) * | 2013-09-27 | 2017-01-18 | オリンパス株式会社 | レンズ加工装置及びレンズ加工方法 |
| JP2015194528A (ja) * | 2014-03-31 | 2015-11-05 | 富士フイルム株式会社 | 撮像レンズおよび撮像レンズを備えた撮像装置 |
| JP2019035828A (ja) * | 2017-08-12 | 2019-03-07 | ナンチャン オー−フィルム オプティカル−エレクトロニック テック カンパニー リミテッド | 撮像光学系 |
| KR102553554B1 (ko) * | 2018-06-08 | 2023-07-10 | 엘지이노텍 주식회사 | 카메라 모듈 |
| US10809491B2 (en) * | 2018-08-22 | 2020-10-20 | Samsung Electro-Mechanics Co., Ltd. | Portable electronic device, optical imaging system, and lens assembly |
| CN110297320B (zh) * | 2019-07-30 | 2024-06-04 | 浙江舜宇光学有限公司 | 光学成像系统 |
-
2021
- 2021-02-26 KR KR1020210026940A patent/KR20220122383A/ko active Pending
-
2022
- 2022-02-25 US US18/548,121 patent/US20240151938A1/en active Pending
- 2022-02-25 JP JP2023552136A patent/JP2024508478A/ja active Pending
- 2022-02-25 TW TW111107132A patent/TW202248711A/zh unknown
- 2022-02-25 CN CN202280017229.9A patent/CN116917788A/zh active Pending
- 2022-02-25 WO PCT/KR2022/002777 patent/WO2022182192A1/ko not_active Ceased
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|---|---|---|---|---|
| JP2000019373A (ja) * | 1998-07-03 | 2000-01-21 | Olympus Optical Co Ltd | 対物レンズ |
| JP2006267391A (ja) * | 2005-03-23 | 2006-10-05 | Mitsubishi Electric Corp | 撮像装置 |
| US20120229916A1 (en) * | 2011-03-11 | 2012-09-13 | Sharp Kabushiki Kaisha | Optical element, optical element module, electronic element module, and electronic information device |
| KR20160103541A (ko) * | 2015-02-24 | 2016-09-01 | 주식회사 마부치코리아 | 결상용 렌즈 어레이 광학계 및 이를 포함한 촬영 장치 |
| KR102108199B1 (ko) * | 2017-12-12 | 2020-05-08 | 삼성전기주식회사 | 렌즈 조립체 및 이를 포함하는 카메라 모듈 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116917788A (zh) | 2023-10-20 |
| JP2024508478A (ja) | 2024-02-27 |
| KR20220122383A (ko) | 2022-09-02 |
| TW202248711A (zh) | 2022-12-16 |
| US20240151938A1 (en) | 2024-05-09 |
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