WO2022170955A1 - 一种镜头、摄像头模组及电子设备 - Google Patents
一种镜头、摄像头模组及电子设备 Download PDFInfo
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- WO2022170955A1 WO2022170955A1 PCT/CN2022/073570 CN2022073570W WO2022170955A1 WO 2022170955 A1 WO2022170955 A1 WO 2022170955A1 CN 2022073570 W CN2022073570 W CN 2022073570W WO 2022170955 A1 WO2022170955 A1 WO 2022170955A1
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- lens
- focal length
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- 230000003287 optical effect Effects 0.000 claims abstract description 163
- 238000003384 imaging method Methods 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 6
- 239000012790 adhesive layer Substances 0.000 claims description 3
- 238000012634 optical imaging Methods 0.000 abstract description 2
- 230000004075 alteration Effects 0.000 description 188
- 238000010586 diagram Methods 0.000 description 91
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- 238000009434 installation Methods 0.000 description 4
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- 238000000465 moulding Methods 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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Images
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
- G02B13/0055—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
- G02B3/00—Simple or compound lenses
- G02B3/12—Fluid-filled or evacuated lenses
- G02B3/14—Fluid-filled or evacuated lenses of variable focal length
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—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
- G02B13/0015—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
- G02B13/004—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 four 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
- G02B13/0015—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
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
-
- 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
- G02B13/0075—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having an element with variable optical properties
-
- 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
- G02B13/009—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras having zoom function
-
- 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
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/163—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
- G02B15/167—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
- G02B15/173—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses arranged +-+
-
- 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
- G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
- G02B27/4205—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having a diffractive optical element [DOE] contributing to image formation, e.g. whereby modulation transfer function MTF or optical aberrations are relevant
- G02B27/4211—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having a diffractive optical element [DOE] contributing to image formation, e.g. whereby modulation transfer function MTF or optical aberrations are relevant correcting chromatic aberrations
-
- 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 -
- G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only
-
- 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
- G03B17/17—Bodies with reflectors arranged in beam forming the photographic image, e.g. for reducing dimensions of camera
-
- 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
Definitions
- the present application relates to the technical field of optical imaging, and in particular, to a lens, a camera module and an electronic device.
- Figure 1 shows a partial structure diagram of an existing lens with a telephoto used in electronic devices such as mobile phones and tablet computers.
- the lens is formed along the height direction of each lens ( A cut is performed in the direction of I in FIG. 1 , so that the height of the lens is reduced, such a technique may be called an I-cut process, and the dotted line M in FIG. 1 is shown as a cutting line.
- the present application provides a lens, a camera module and an electronic device, the main purpose of which is to provide a lens with a telephoto function, which can reduce the height size and improve the imaging quality.
- the present application provides a lens along the direction from the object field to the image field, the lens includes a first lens, a prism and a plurality of lenses, the first lens has a positive refractive power, and the object side of the first lens is a convex surface , the object side of the prism is in contact with the image side of the first lens, the light received from the first lens is refracted by the prism on the second optical axis intersecting with the first optical axis by the first optical axis, and the plurality of lenses includes at least three The lens, the plurality of lenses are arranged in sequence along the second optical axis, the object side and the image side of the lens close to the prism in the plurality of lenses are aspherical, and the image side of the lens close to the image field of the lens in the plurality of lenses is convex. .
- the lens provided by the present application has a first lens whose object side is convex, and a prism for connecting with the first lens, so that the prism can refract the light collected from the first lens from the first optical axis to the second lens.
- a bending optical axis is provided for the entire lens.
- the lens can meet the telephoto requirements.
- At least one lens among the plurality of lenses is a diffractive optical element.
- the light entering the optical diffractive element can change the optical path, so that the light in different wavelength ranges can be converged to the same intersection point, so that the chromatic aberration can be corrected and the image quality can be optimized.
- At least one lens among the plurality of lenses is a first zoom liquid lens.
- the lens further includes a second zoom liquid lens, and the second zoom liquid lens is disposed on a side of the first lens close to the object field.
- the zoom liquid lens has a zoom function, which can make the total focal length range of the lens larger, and further expand the application range of the lens.
- the plurality of lenses include: a second lens with negative refractive power, a third lens with positive refractive power, and a fourth lens with refractive power; the second lens, the third lens The lens and the fourth lens are sequentially arranged along the second optical axis.
- the lens thus formed may be referred to as a lens in which a refractive prism group (including a first lens and a prism) is combined with three lenses.
- the second lens with negative refractive power helps to correct the field curvature of the lens so that the imaging surface of the lens is flatter, and the third lens has positive refractive power so that light can be dispersed in the fourth lens The convergence ability of the object side to avoid excessive aberration of the lens.
- the ratio of the focal length f2 of the second lens to the total focal length f of the lens is:
- the plurality of lenses include: a second lens with optical power, a third lens with optical power, a fourth lens with optical power, and a fifth lens with optical power lenses; the second lens, the third lens and the fourth lens, and the fifth lens are sequentially arranged along the second optical axis.
- the lens thus formed may be referred to as a lens in which a refractive prism group (including a first lens and a prism) is combined with four lenses.
- the ratio of the focal length f2 of the second lens to the total focal length f of the lens is:
- the plurality of lenses include a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with negative refractive power, and a fifth lens with positive refractive power a lens, and a sixth lens with negative refractive power; the second lens, the third lens, the fourth lens and the fifth lens, and the sixth lens are sequentially arranged along the second optical axis.
- the lens thus formed may be referred to as a lens in which a refractive prism group (including a first lens and a prism) is combined with five lenses.
- the second lens is of positive refractive power
- the third lens is of negative refractive power
- the third lens with negative refractive power helps to correct the field curvature of the light transmitted from the second lens, so that the imaging Flatter
- the fourth lens has a negative refractive power
- the fifth lens has a positive refractive power
- the fourth lens can disperse light, and is corrected by the fifth lens to improve the image quality.
- the ratio of the focal length f2 of the second lens to the total focal length f of the lens is:
- the total focal length f of the lens is: 14mm ⁇ f ⁇ 33mm.
- the overall focal length of this lens is designed to be between 14mm and 33mm to make this lens a telephoto lens.
- the ratio of the curvature radius R of the lens close to the image field of the lens among the plurality of lenses to the total focal length f of the lens is: In this way, the astigmatism of the lens can be corrected.
- the ratio of the Abbe number V1 of the first lens to the Abbe number V2 of the prism is:
- the chromatic aberration of the lens can be corrected.
- the ratio of the image height H of the lens to the total optical length TTL of the lens is: In this way, the volume of the entire lens can be further reduced.
- the prism is made of glass material
- the first lens is made of plastic material
- the first lens is bonded to the prism through an adhesive layer.
- the refracting prism group formed in this way (including the first lens and the prism) is a glass-plastic hybrid refracting prism group.
- both the prism and the first lens are made of a plastic material, or both the prism and the first lens are made of a glass material, and the prism and the first lens have an integral structure.
- the refracting prism group formed in this way is a refracting prism group formed integrally with glass or an integrally formed refracting prism group by injection molding.
- the present application further provides a camera module, the camera module includes an image sensor and the lens in any implementation manner of the first aspect, and the photosensitive surface of the image sensor is opposite to the imaging surface in the lens.
- the camera module provided by the embodiment of the present application includes the lens of the embodiment of the first aspect. Since the prism of the lens can refract the light collected from the first lens from the first optical axis to the second optical axis, the entire lens is provided with By bending the optical axis, the height dimension of the lens can be reduced compared to the prior art without reducing the amount of incoming light, thereby reducing the height dimension of the entire camera module. In addition, since the object side and the image side of the lens close to the prism in the plurality of lenses are aspherical, and the image side of the lens close to the image field of the lens in the plurality of lenses is convex, these two characteristics cooperate, The imaging quality can be optimized to improve the imaging quality of the camera module.
- the present application further provides an electronic device, the electronic device includes a processing unit and the camera module in the implementation manner of the second aspect, and the processing unit is connected to the image sensor in the camera module.
- the electronic device provided by the embodiment of the present application includes the camera module of the embodiment of the second aspect. Therefore, the electronic device provided by the embodiment of the present application and the camera module of the above technical solution can solve the same technical problem and achieve the same expected effect.
- FIG. 1 is a schematic structural diagram of a lens in the prior art
- FIG. 2 is a schematic diagram of a part of the structure of a lens
- 3a is a schematic structural diagram of an electronic device provided by an embodiment of the application.
- Fig. 3b is the exploded view of Fig. 3a;
- FIG. 4 is a schematic structural diagram of a camera module provided by an embodiment of the present application.
- FIG. 5 is a schematic structural diagram of a lens provided by an embodiment of the present application.
- Fig. 6 is the imaging optical path diagram of the lens shown in Fig. 5;
- FIG. 7 is a schematic diagram of a zooming principle of a zooming liquid lens provided by an embodiment of the present application.
- Fig. 8a is an axial aberration curve diagram of the lens shown in Fig. 5;
- Fig. 8b is a lateral aberration curve diagram of the lens shown in Fig. 5;
- Fig. 8c is a distortion aberration curve diagram of the lens shown in Fig. 5;
- Fig. 8d is an ideal distortion aberration curve diagram of the lens shown in Fig. 5;
- FIG. 9 is a schematic structural diagram of a lens provided by an embodiment of the present application.
- Fig. 10a is an axial aberration curve diagram of the lens shown in Fig. 9;
- Fig. 10b is a lateral aberration curve diagram of the lens shown in Fig. 9;
- Fig. 10c is a distortion aberration curve diagram of the lens shown in Fig. 9;
- Fig. 10d is an ideal distortion aberration curve diagram of the lens shown in Fig. 9;
- FIG. 11 is a schematic structural diagram of a lens provided by an embodiment of the application.
- Fig. 12a is an axial aberration curve diagram of the lens shown in Fig. 11;
- Fig. 12b is a lateral aberration curve diagram of the lens shown in Fig. 11;
- Fig. 12c is a distortion aberration curve diagram of the lens shown in Fig. 11;
- Fig. 12d is an ideal distortion aberration curve diagram of the lens shown in Fig. 11;
- FIG. 13 is a schematic structural diagram of a lens provided by an embodiment of the application.
- Fig. 14a is an axial aberration curve diagram of the lens shown in Fig. 13;
- Fig. 14b is a lateral aberration curve diagram of the lens shown in Fig. 13;
- Fig. 14c is a distortion aberration curve diagram of the lens shown in Fig. 13;
- Fig. 14d is an ideal distortion aberration curve diagram of the lens shown in Fig. 13;
- 15 is a schematic structural diagram of a lens provided by an embodiment of the application.
- Fig. 16a is an axial aberration curve diagram of the lens shown in Fig. 15;
- Fig. 16b is a lateral aberration curve diagram of the lens shown in Fig. 15;
- Fig. 16c is a distortion aberration curve diagram of the lens shown in Fig. 15;
- Fig. 16d is an ideal distortion aberration curve diagram of the lens shown in Fig. 15;
- FIG. 17 is a schematic structural diagram of a lens provided by an embodiment of the application.
- Fig. 18a is an axial aberration curve diagram of the lens shown in Fig. 17;
- Fig. 18b is a lateral aberration curve diagram of the lens shown in Fig. 17;
- FIG. 19 is a schematic structural diagram of a lens provided by an embodiment of the application.
- Fig. 20a is an axial aberration curve diagram of the lens shown in Fig. 19;
- Fig. 20b is a lateral aberration curve diagram of the lens shown in Fig. 19;
- Fig. 20c is a distortion aberration curve diagram of the lens shown in Fig. 19;
- Figure 20d is an ideal distortion aberration curve diagram of the lens shown in Figure 19;
- 21 is a schematic structural diagram of a lens provided by an embodiment of the application.
- Fig. 22a is an axial aberration curve diagram of the lens shown in Fig. 21;
- Fig. 22b is a lateral aberration curve diagram of the lens shown in Fig. 21;
- Fig. 22c is a distortion aberration curve diagram of the lens shown in Fig. 21;
- Fig. 22d is an ideal distortion aberration curve diagram of the lens shown in Fig. 21;
- FIG. 23 is a schematic structural diagram of a lens provided by an embodiment of the application.
- Figure 24a is an axial aberration curve diagram of the lens shown in Figure 23;
- Figure 24b is a lateral aberration curve diagram of the lens shown in Figure 23;
- Fig. 24c is a distortion aberration curve diagram of the lens shown in Fig. 23;
- Figure 24d is an ideal distortion aberration curve diagram of the lens shown in Figure 23;
- 25 is a schematic structural diagram of a lens provided by an embodiment of the application.
- Figure 26a is an axial aberration curve diagram of the lens shown in Figure 25;
- Figure 26b is a lateral aberration curve diagram of the lens shown in Figure 25;
- Fig. 26c is a distortion aberration curve diagram of the lens shown in Fig. 25;
- Figure 26d is an ideal distortion aberration curve diagram of the lens shown in Figure 25;
- FIG. 27 is a schematic structural diagram of a lens provided by an embodiment of the application.
- Fig. 28a is an axial aberration curve diagram of the lens shown in Fig. 27;
- Figure 28b is a lateral aberration curve diagram of the lens shown in Figure 27;
- Fig. 28c is a distortion aberration curve diagram of the lens shown in Fig. 27;
- Fig. 28d is an ideal distortion aberration curve diagram of the lens shown in Fig. 27;
- 29 is a schematic structural diagram of a lens provided by an embodiment of the application.
- Figure 30a is an axial aberration curve diagram of the lens shown in Figure 29;
- Figure 30b is a lateral aberration curve diagram of the lens shown in Figure 29;
- Fig. 30c is a distortion aberration curve diagram of the lens shown in Fig. 29;
- Figure 30d is an ideal distortion aberration curve diagram of the lens shown in Figure 29;
- FIG. 31 is a schematic structural diagram of a lens provided by an embodiment of the application.
- Figure 32a is an axial aberration curve diagram of the lens shown in Figure 31;
- Figure 32b is a lateral aberration curve diagram of the lens shown in Figure 31;
- Fig. 32c is a distortion aberration curve diagram of the lens shown in Fig. 31;
- Fig. 32d is an ideal distortion aberration curve diagram of the lens shown in Fig. 31;
- FIG. 33 is a schematic structural diagram of a lens provided by an embodiment of the application.
- Figure 34a is an axial aberration curve diagram of the lens shown in Figure 33;
- Figure 34b is a lateral aberration curve diagram of the lens shown in Figure 33;
- Fig. 34c is a distortion aberration curve diagram of the lens shown in Fig. 33;
- FIG. 34d is an ideal distortion aberration curve diagram of the lens shown in FIG. 33 .
- Image side, object side is the range through which the imaging light passes, and the imaging light includes the chief ray and the marginal ray.
- the image side is the surface facing the image field
- the object side is the surface facing the object field.
- Focal power equal to the difference between the convergence of the image-side beam and the object-side beam convergence, which characterizes the refractive power of the optical system for incident parallel beams.
- the optical power is generally represented by ⁇ .
- ⁇ >0 the inflection is convergent; when ⁇ 0, the inflection is divergent.
- Image height The height of the image formed by the lens on the imaging surface is called the image height, which is generally expressed by IMH.
- Thickness of a lens The thickness of a lens on the optical axis is the thickness of the lens. As shown in Figure 2, the thickness of the first lens is T1.
- Total track length The length on the optical axis from the object side of the first optical element facing the object side in the lens to the imaging plane is the total optical length. As shown in FIG. 2 , the length S on the optical axis from the object side of the first lens to the imaging plane M is TTL.
- Aperture stop It is a device used to control the amount of light that passes through the lens and enters the photosensitive surface of the fuselage.
- the aperture size is often expressed in F/number. For example, F/1.0.
- the embodiment of the present application provides an electronic device, in which the electronic device has a camera module with functions of shooting and recording images.
- the above-mentioned electronic devices may include mobile phones (mobile phones), tablet computers (pads), smart wearable products (eg, smart watches, smart bracelets), monitors, driving recorders, and the like.
- the embodiments of the present application do not specifically limit the specific form of the above electronic device.
- FIG. 3a is a perspective view of an electronic device provided by some embodiments of the present application
- FIG. 3b is an exploded view of the electronic device shown in FIG. 3a.
- the electronic device is a mobile phone as an example.
- the electronic device includes a casing 10 , a camera decorative cover 20 , a camera module 30 and a main board 40 .
- the casing 10 is a casing structure formed by splicing a front cover plate (not shown in the figure), a frame 11 and a rear cover 12, and is used to protect the internal electronic devices and circuits of the electronic device.
- the rear cover 12 is provided with an installation opening 50 , the camera decorative cover 20 covers the installation opening 50 , and the camera decorative cover 20 is used to protect the rear camera module of the electronic device.
- the camera decorative cover 20 protrudes to the outside of the housing 10 , so that the camera decorative cover 20 can increase the installation space of the rear camera module in the electronic device along the thickness direction of the electronic device. In other embodiments, the camera decorative cover 20 may not protrude to the outside of the housing 10 .
- the camera decorative cover 20 is provided with at least one light-transmitting window 21 , and the at least one light-transmitting window 21 is used to allow scene light to enter the rear camera module.
- the camera module 30 is disposed in the casing 10, and the camera module 30 is used for taking photos or videos.
- the number of camera modules 30 may be one or more.
- the camera module 30 can be used as a front camera module, and can also be used as a rear main camera module or a rear sub camera module, wherein the rear sub camera module Camera modules include, but are not limited to, wide-angle camera modules, telephoto camera modules, etc., which are not specifically limited here.
- the multiple camera modules 30 can be respectively used as a plurality of front camera modules, rear main camera modules, and rear sub-camera modules.
- 3a and 3b only show an example that the number of camera modules 30 is one, and the camera module 30 is used as an example of the rear main camera module, which should not be considered as a special limitation to the present application.
- the camera module 30 includes a lens 301 and an image sensor 302.
- the photosensitive surface of the image sensor 302 is opposite to the imaging surface of the lens 301, and a processing unit connected to the image sensor 302 is integrated on the main board.
- the optical image generated by the lens 301 is projected onto the photosensitive surface of the image sensor 302, and then converted into an electrical signal, which is then converted into a digital image signal through analog-to-digital conversion, and then sent to the processor for processing, and then transmitted to the display.
- the display for example, mobile phone screen
- the lens 301 includes a plurality of lenses arranged along the optical axis, and a barrel for carrying these lenses.
- the size of the lens 301 in the height direction (Z direction in FIG. 4 ) is getting smaller and smaller, and in the length direction ( FIG. 4 )
- the size of the lens in the X direction) is getting smaller and smaller, that is, the optical assembly of the lens is getting smaller and smaller.
- the lens that can achieve telephoto is more and more popular, and the requirements for image quality and magnification are also getting higher and higher.
- FIG. 5 shows a structural diagram of a lens, from the object field to the image field direction, the lens includes a first lens G11 with positive refractive power, a prism G12 and a lens group G2 formed by a plurality of lenses, wherein the prism G12
- the light received from the first lens G11 is refracted by the first optical axis X1 on the second optical axis X2 intersecting with the first optical axis X1, and the object side of the first lens G11 is a convex surface, and the image side of the first lens G11 is the same as the
- the object sides of the prism G12 are in contact, and the first lens G11 and the prism G12 here form a refractive prism group G1.
- the first lens G11 with the convex surface on the object side converges the light received from the object field and transmits it to the prism G12, which then refracts the light collected from the first lens G11 from the first optical axis X1 to the second optical axis X2 , provides a bent optical axis for the entire lens.
- the prism G12 which then refracts the light collected from the first lens G11 from the first optical axis X1 to the second optical axis X2 , provides a bent optical axis for the entire lens.
- the first lens G11 is attached to the prism G12, which can be realized in various ways.
- the prism G12 is made of glass material
- the first lens G11 is made of plastic material.
- the first lens G11 may be attached to the prism G12 through an adhesive layer.
- the prism G12 and the first lens G11 are both made of plastic material, and can be made by an integral molding process, such as an injection molding process.
- the prism G12 and the first lens G11 are both made of glass material, and can be made by an integral molding process.
- the first optical axis X1 of the present application may be perpendicular to the second optical axis X2, for example, as shown in FIG. 5 .
- the first optical axis X1 and the second optical axis X2 may have other included angles.
- the present application does not limit the angle at which the bending optical axis is folded.
- the total focal length f of the lens is: 14mm ⁇ f ⁇ 33mm. In this way, the light convergence can be improved and the imaging quality can be improved. Even in the telephoto scene, the imaging quality is relatively good.
- the ratio of the Abbe number V1 of the first lens G11 to the Abbe number V2 of the prism G12 is:
- the lens group G2 formed by a plurality of lenses includes at least three lenses, and the plurality of lenses are arranged in sequence along the second optical axis X2.
- the image side surfaces of the lenses in the lens group G2 close to the image field of the lenses are convex.
- the lens group G2 includes three lenses arranged in sequence along the second optical axis X2, the three lenses are the second lens G21, the third lens G22 and the fourth lens G23, the fourth lens G23
- the image side of the lens group G2 is convex
- Fig. 6 is the optical path diagram of Fig. 5. If the image side of the lens of the lens group G2 close to the image field of the lens is designed as a convex surface, the light emitted from the lens group G2 can be converged and the image quality can be improved. .
- the object side surface and the image side surface of the lens close to the prism G12 of the lens group G2 are both aspherical surfaces (aspheric, ASP).
- the aspherical surface can easily make the lens into a shape other than the spherical surface, obtain more control variables, reduce aberrations, improve the imaging quality, and can also reduce the number of required lenses, thus effectively reducing the total optical length.
- At least one lens in the lens group G2 in the lens given in this application is a diffractive optical element (DOE).
- DOE diffractive optical element
- the lens provided in this application further includes at least one zoom liquid lens, and the lens group G2 may include a first zoom liquid lens.
- a first zoom liquid lens may be provided on the side of the first lens G11 close to the object field. Two zoom liquid lenses.
- FIG. 7 is a schematic diagram of the structure of a zoom liquid lens.
- the zoom liquid lens includes a drive cavity 1 and an optical cavity 2 that are connected to each other, that is, the liquid in the drive cavity 1 and the liquid in the optical cavity 2 can be between the two cavities.
- the liquid in the optical cavity 2 changes, the surface tension of the light-emitting surface 3 changes, so that the curvature of the light-emitting surface 3 changes.
- the permanent magnet 4 and the coil 5 form a power source for driving the flow between the liquid in the optical cavity 2 and the liquid in the driving cavity 1 .
- the working principle of the zoom liquid lens shown in FIG. 7 can be explained as follows: for example, at the first moment, after the coil 5 is connected to the first current, the magnetic field generated by the coil 5 is different from the magnetic field generated by the permanent magnet 4, attracting the permanent magnet 4 moves downward, so that the volume of the driving cavity 1 becomes smaller, and the liquid in the driving cavity 1 flows to the optical cavity 2, causing the light-emitting surface 3 to deform to form the first curvature (shown by the solid line), so that the focal length of the zoom liquid lens is F1.
- the magnetic field generated by the coil 5 is different from the magnetic field generated by the permanent magnet 4, attracting the permanent magnet 4 to move downward, so that the volume of the driving cavity 1 becomes smaller, and the driving cavity 1
- the liquid inside flows to the optical cavity 2, causing the light exit surface 3 to deform to form a second curvature (shown by the dotted line), so that the focal length of the zoom liquid lens is F2.
- the total focal length of the lens can be changed to play the role of zoom, so that the lens can be suitable for long-focus and short-focus scenes.
- the lens further includes an aperture, which is arranged on the side of the first lens G11 close to the object field, and the amount of light entering the lens is controlled through the aperture.
- the lens may also include an IR filter that reduces or eliminates interference from ambient noise on the image sensor.
- lenses of lens group G2 with three lenses, lenses of lens group G2 with four lenses, and lenses of lens group G2 with five lenses are given below.
- the lens group G2 has three lenses, and the three lenses are the second lens G21 , the third lens G22 and the fourth lens G23 arranged in sequence along the second optical axis X2 .
- the object side surface is opposite to the image side surface of the prism G12, the image side surface of the fourth lens G23 is a convex surface, and the object side surface is a concave surface.
- the lens also includes a flat glass G3, in addition to this, the lens can also include an IR filter G4, the flat glass G3 is arranged on the image side of the fourth lens G23, and the IR filter G4 is arranged on the flat glass G3. like the side.
- the image side surface of the fourth lens G23 is convex, and the object side surface is concave.
- the ratio of the focal length f1 of the refractive prism group G1 to the total focal length f of the lens is:
- the second lens G21 has negative refractive power, and the ratio of the focal length f2 of the second lens G21 to the total focal length f of the lens is:
- the third lens G22 has positive refractive power, and the ratio of the focal length f3 of the third lens G22 to the total focal length f of the lens is:
- the fourth lens G23 has negative refractive power, and the ratio of the focal length f4 of the fourth lens G23 to the total focal length f of the lens is:
- the ratio of the total track length (TTL) of the lens to the total focal length f of the lens is:
- the ratio of the image height of the lens to the overall focal length f of the lens is:
- the following table 1-1 shows the optical parameters of the lens.
- Tables 1-2 are the optical parameters of each optical device in the lens.
- Radius is the radius of curvature
- Thickness is the thickness of the lens
- nd is the refractive index of the lens
- vd is the Abbe number of the lens
- Infinity is the infinite radius of curvature
- R2 is the image side of the first lens G11
- A-01 in G1 is the object side of the prism G12
- B-03 in G1 is the reflection surface of the prism G12
- C-02 in G1 is the image side of the prism G12
- the rest R1 in each lens is the object side of the corresponding lens
- R2 is the image side of the corresponding lens.
- Table 1-3 is the aspheric coefficient of each lens in the above Table 1-2.
- K is the quadratic surface constant
- a 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 are the second-order aspheric coefficient, the third-order aspheric coefficient, the fourth-order aspheric coefficient, the fifth-order aspheric coefficient, and the fifth-order aspheric coefficient, respectively.
- the lens provided by this embodiment includes two aspheric surfaces and is an even-order aspheric surface.
- the sag Z of all even-order aspheric surfaces can be calculated by using the following formula: Qualified, but not limited to the following formulas.
- Z represents the sag height of the aspheric surface
- r is the radial coordinate of the aspheric surface
- C is the spherical curvature of the aspheric surface vertex.
- Figure 8a shows the axial aberration curve when the lens structure shown in Figure 5 is adopted and the data shown in Table 1-1, Table 1-2 and Table 1-3 are used.
- the abscissa of Figure 8a is the axial direction Aberration, the unit can be micrometer ( ⁇ m), the ordinate is the field of view, and the unit can be degrees.
- the five curves shown in Figure 8a are the axial aberration curves with design wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm respectively. It can be seen from Figure 8a that the axial aberration of light with different wavelengths is controlled at -0.1 ⁇ m to within 0.1 ⁇ m, that is, controlled within a very small range.
- Figure 8b shows the lateral aberration curve when the lens structure shown in Figure 5 is adopted and the data shown in Table 1-1, Table 1-2 and Table 1-3 are used.
- the abscissa of Figure 8b is the lateral aberration
- the ordinate is the field of view.
- the five curves shown in Figure 8b are the lateral aberration curves with the design wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively.
- the dotted line represents the diffraction limit range. It can be seen from Figure 8b that the lateral aberration of light with different wavelengths within the diffraction limit.
- Figure 8c shows the distortion aberration curve when the lens structure shown in Figure 5 is used and the data shown in Table 1-1, Table 1-2 and Table 1-3 are used.
- Figure 8d is the ideal distortion aberration curve.
- the abscissa of Fig. 8c and Fig. 8d is the distortion aberration, and the ordinate is the field of view. It can be seen from the comparison of Fig. 8c and Fig. 8d that the distortion aberration of light of different wavelengths is within the range of naked eye recognition.
- the ideal distortion aberration is around 0.05 ⁇ m
- the distortion aberration of light with different wavelengths is controlled within less than 0.01 ⁇ m, where 0.01 ⁇ m is obtained by 0.05 ⁇ m ⁇ 2%, that is That is, the distortion aberration of light of different wavelengths is controlled within 2% of the ideal distortion aberration.
- the lens group G2 has three lenses, and the three lenses are the second lens G21 , the third lens G22 and the fourth lens G23 arranged in sequence along the second optical axis X2 .
- the lens also includes flat glass G3, in addition to this, the lens can also include IR filter G4.
- the fourth lens G23 is a DOE, and the image side surface of the fourth lens G23 is a convex surface, and the object side surface is a concave surface. In some optional embodiments, the object side of the fourth lens G23 is in contact with the third lens G22.
- the ratio of the focal length f1 of the refractive prism group G1 to the total focal length f of the lens is:
- the second lens G21 has negative refractive power, and the ratio of the focal length f2 of the second lens G21 to the total focal length f of the lens is:
- the third lens G22 has positive refractive power, and the ratio of the focal length f3 of the third lens G22 to the total focal length f of the lens is:
- the fourth lens G23 has positive refractive power, and the ratio of the focal length f4 of the fourth lens G23 to the total focal length f of the lens is:
- the ratio of the total track length (TTL) of the lens to the total focal length f of the lens is:
- the ratio of the image height of the lens to the overall focal length f of the lens is:
- the following table 2-1 shows the optical parameters of the lens.
- Table 2-2 shows the optical parameters of each optical device in the lens.
- the physical meaning represented by each optical parameter is the same as that in Table 1-2 above, and will not be repeated here.
- the following Table 2-3 is the aspheric coefficient of each lens in the above Table 2-2.
- the image side and the object side of the second lens G21 are respectively an even-order aspheric surface
- the object side of the fourth lens G23 is a binary diffraction surface (Binary 2)
- the image side of the fourth lens G23 is an even-order aspheric surface.
- Table 2-4 shows the diffraction surface coefficients of the object side surface of the fourth lens G23 in the above Table 2-3.
- the lens provided by this embodiment includes three even-order aspheric surfaces.
- the sag Z of all even-order aspheric surfaces can also be limited by the following formula, but not Limited to the following formula.
- Z represents the sag height of the aspheric surface
- r is the radial coordinate of the aspheric surface
- C is the spherical curvature of the aspheric surface vertex.
- the sag Z2 of the binary diffraction surface can be defined by the following formula:
- M represents the diffraction order
- p is the phase distribution power
- A is the phase distribution coefficient
- C is the spherical curvature of the aspheric vertex
- r is the radial coordinate of the aspheric surface.
- Figure 10a shows the axial aberration curve when the lens structure shown in Figure 9 is used and the data shown in Table 2-1, Table 2-2, Table 2-3 and Table 2-4 are used.
- the five curves shown in Figure 10a are the axial aberration curves with the design wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm respectively. It can be seen from Figure 10a that the axial aberration of light with different wavelengths is controlled within a very within a small range.
- Figure 10b shows the lateral aberration curve when the lens structure shown in Figure 9 is used and the data shown in Table 2-1, Table 2-2, Table 2-3 and Table 2-4 are used.
- the five curves shown in Figure 10b are the lateral aberration curves with the design wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively.
- the dotted line represents the diffraction limit range. It can be seen from Figure 10b that the lateral aberration of light with different wavelengths in the diffraction range.
- Figure 10c shows the distortion aberration curve when using the lens structure shown in Figure 9 and the data shown in Table 2-1, Table 2-2, Table 2-3 and Table 2-4 above, and Figure 10d is ideal Distortion aberration curve. It can be seen from the comparison of Fig. 10c and Fig. 10d that the distortion aberration of light of different wavelengths is within the range of naked eye recognition.
- the lens group G2 has three lenses, and the three lenses are a second lens G21, a third lens G22 and a fourth lens G23 arranged in sequence along the second optical axis X2.
- the lens also includes flat glass G3, in addition to this, the lens can also include IR filter G4.
- the plate glass G3 is arranged on the image side of the fourth lens G23, and the IR filter G4 is arranged on the image side of the plate glass G3.
- the image side surface of the fourth lens G23 is convex, and the object side surface is concave.
- the ratio of the focal length f1 of the refractive prism group G1 to the total focal length f of the lens is:
- the second lens G21 has negative refractive power, and the ratio of the focal length f2 of the second lens G21 to the total focal length f of the lens is:
- the third lens G22 has positive refractive power, and the ratio of the focal length f3 of the third lens G22 to the total focal length f of the lens is:
- the fourth lens G23 has negative refractive power, and the ratio of the focal length f4 of the fourth lens G23 to the total focal length f of the lens is:
- the ratio of the total track length (TTL) of the lens to the total focal length f of the lens is:
- the ratio of the image height of the lens to the overall focal length f of the lens is:
- the following table 3-1 shows the optical parameters of the lens.
- Total Optical Length (TTL) 33.67mm Design wavelength 650nm, 610nm, 555nm, 510nm, 470nm
- the following table 3-2 shows the optical parameters of each optical device in the lens.
- Table 3-3 is the aspheric coefficient of each lens in the above Table 3-2.
- the lens provided by this embodiment includes two even-order aspheric surfaces.
- the sag Z of all even-order aspheric surfaces can be limited by the following formula, but not limited to: the following formula.
- Z represents the sag height of the aspheric surface
- r is the radial coordinate of the aspheric surface
- C is the spherical curvature of the aspheric surface vertex.
- Figure 12a shows the axial aberration curves when the lens structure shown in Figure 11 is adopted and the above-mentioned Table 3-1, Table 3-2 and Table 3-3 are used.
- the five curves shown in Figure 12a are the axial aberration curves with the design wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm respectively. It can be seen from Figure 12a that the axial aberration of light with different wavelengths is controlled within a very within a small range.
- Fig. 12b shows the lateral aberration curve when the lens structure shown in Fig. 11 is adopted and the above-mentioned Table 3-1, Table 3-2 and Table 3-3 are used.
- the five curves shown in Figure 12b are the lateral aberration curves with the design wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively.
- the dotted line represents the diffraction limit range. It can be seen from Figure 12b that the lateral aberration of light with different wavelengths in the diffraction range.
- Figure 12c shows the distortion aberration curve when the lens structure shown in Figure 11 is adopted and the above-mentioned Table 3-1, Table 3-2 and Table 3-3 are used, and Figure 12d is the ideal distortion aberration curve. It can be seen from the comparison between Fig. 12c and Fig. 12d that the distortion aberration of light of different wavelengths is within the range of naked eye recognition.
- the lens group G2 has three lenses, and the three lenses are the second lens G21, the third lens G22 and the fourth lens G23 arranged in sequence along the second optical axis X2,
- the object side surface of the second lens G21 is opposed to the image side surface of the prism G12.
- the lens also includes flat glass G3, in addition to this, the lens can also include IR filter G4.
- the ratio of the focal length f1 of the refractive prism group G1 to the total focal length f of the lens is:
- the second lens G21 has negative refractive power, and the ratio of the focal length f2 of the second lens G21 to the total focal length f of the lens is:
- the third lens G22 has positive refractive power, and the ratio of the focal length f3 of the third lens G22 to the total focal length f of the lens is:
- the fourth lens G23 has negative refractive power, and the ratio of the focal length f4 of the fourth lens G23 to the total focal length f of the lens is:
- the ratio of the total track length (TTL) of the lens to the total focal length f of the lens is:
- the ratio of the image height of the lens to the overall focal length f of the lens is:
- the following table 4-1 shows the optical parameters of the lens.
- the following table 4-2 shows the optical parameters of each optical device in the lens.
- Table 4-3 is the aspheric coefficient of each lens in the above Table 4-2.
- the image side surface and the object side surface of the second lens G21 are respectively even-order aspheric surfaces.
- the lens provided by this embodiment includes two even-order aspheric surfaces.
- the sag Z of all even-order aspheric surfaces can be limited by the following formula, but not limited to: the following formula.
- Z represents the sag height of the aspheric surface
- r is the radial coordinate of the aspheric surface
- C is the spherical curvature of the aspheric surface vertex.
- Figure 14a shows the axial aberration curves when the lens structure shown in Figure 13 is adopted and the above-mentioned Table 4-1, Table 4-2 and Table 4-3 are used.
- the five curves shown in Figure 14a are the axial aberration curves with design wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm respectively. It can be seen from Figure 14a that the axial aberration of light with different wavelengths is controlled within a very within a small range.
- Fig. 14b shows the lateral aberration curve when the lens structure shown in Fig. 13 is adopted and the above-mentioned Table 4-1, Table 4-2 and Table 4-3 are used.
- the five curves shown in Figure 14b are the lateral aberration curves with design wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively.
- the dotted line represents the diffraction limit range. It can be seen from Figure 14b that the lateral aberration of light with different wavelengths in the diffraction range.
- Figure 14c shows the distortion aberration curve when the lens structure shown in Figure 13 is adopted and the above-mentioned Table 4-1, Table 4-2 and Table 4-3 are used, and Figure 14d is the ideal distortion aberration curve. It can be seen from the comparison between Fig. 14c and Fig. 14d that the distortion aberration of light of different wavelengths is within the range of naked eye recognition.
- the lens group G2 has three lenses, and the three lenses are the second lens G21, the third lens G22 and the fourth lens G23 arranged in sequence along the second optical axis X2,
- the object side of the second lens G21 is opposite to the image side of the prism G12, and the fourth lens G23 is a zoom liquid lens.
- the lens also includes flat glass G3, in addition to this, the lens can also include IR filter G4.
- the image side surface of the third lens G22 is a convex surface. If the image side surface of the third lens G22 is designed as a convex surface, the light can be collected and the image quality can be further improved.
- the image side surface of the fourth lens G23 is convex, and the object side surface is concave.
- the ratio of the focal length f1 of the refractive prism group G1 to the total focal length f of the lens is:
- the second lens G21 has negative refractive power, and the ratio of the focal length f2 of the second lens G21 to the total focal length f of the lens is:
- the third lens G22 has positive refractive power, and the ratio of the focal length f3 of the third lens G22 to the total focal length f of the lens is:
- the fourth lens G23 has negative refractive power, and the ratio of the focal length f4 of the fourth lens G23 to the total focal length f of the lens is:
- the aperture of this lens is 3.4 ⁇ F/# ⁇ 5.
- the ratio of the total track length (TTL) of the lens to the total focal length f of the lens is:
- the ratio of the image height of the lens to the overall focal length f of the lens is:
- the following table 5-1 shows the optical parameters of the lens.
- the following table 5-2 shows the optical parameters of each optical device in the lens.
- the following table 5-3 shows the curvature radius and corresponding focal length of the zoom liquid lens.
- Table 5-4 is the aspheric coefficient of each lens in the above Table 5-2.
- the image side surface and the object side surface of the second lens G21 are respectively even-order aspheric surfaces.
- the sag Z of all even-order aspheric surfaces can be defined by the following formula, but is not limited to the following formula.
- Z represents the sag height of the aspheric surface
- r is the radial coordinate of the aspheric surface
- C is the spherical curvature of the aspheric surface vertex.
- Figure 16a shows the axial aberration curve when the lens structure shown in Figure 15 is adopted, and the above-mentioned Table 5-1, Table 5-2, Table 5-3, and Table 5-4 are used.
- the five curves shown in Figure 16a are the axial aberration curves with the design wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm respectively. It can be seen from Figure 16a that the axial aberration of light with different wavelengths is controlled within a very within a small range.
- Figure 16b shows the lateral aberration curve when the lens structure shown in Figure 15 is adopted, and the above-mentioned Table 5-1, Table 5-2, Table 5-3, and Table 5-4 are used.
- the five curves shown in Figure 16b are the lateral aberration curves with the design wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively.
- the dotted line represents the diffraction limit range. It can be seen from Figure 16b that the lateral aberration of light with different wavelengths in the diffraction range.
- Figure 16c shows the distortion aberration curve when the lens structure shown in Figure 15 is adopted, and the above-mentioned Table 5-1, Table 5-2, Table 5-3, and Table 5-4 are used, and Figure 16d is the ideal distortion image poor curve. It can be seen from the comparison between Fig. 16c and Fig. 16d that the distortion aberration of light of different wavelengths is within the range of naked eye recognition.
- the lens group G2 includes three lenses, and such a lens structure may be referred to as a combined three-piece lens group.
- the ratio of the focal length of the second lens, f2, to the overall focal length of the lens, f is:
- the lens group G2 has four lenses, and the three lenses are the second lens G21, the third lens G22 and the fourth lens G23 arranged in sequence along the second optical axis X2, As well as the fifth lens G24, the object side of the second lens G21 is opposite to the image side of the prism G12.
- the lens also includes an IR filter G3.
- the image side surface of the fifth lens G24 is a convex surface.
- the ratio of the focal length f1 of the refractive prism group G1 to the total focal length f of the lens is:
- the second lens G21 has negative refractive power, and the ratio of the focal length f2 of the second lens G21 to the total focal length f of the lens is:
- the third lens G22 has positive refractive power, and the ratio of the focal length f3 of the third lens G22 to the total focal length f of the lens is:
- the fourth lens G23 has negative refractive power, and the ratio of the focal length f4 of the fourth lens G23 to the total focal length f of the lens is:
- the fifth lens G24 has positive refractive power, and the ratio of the focal length f5 of the fifth lens G24 to the total focal length f of the lens is:
- the ratio of the total track length (TTL) of the lens to the total focal length f of the lens is:
- the ratio of the image height of the lens to the overall focal length f of the lens is:
- the following table 6-1 shows the optical parameters of the lens.
- TTL Total Optical Length
- the following table 6-2 shows the optical parameters of each optical device in the lens.
- the following Table 6-3 is the aspheric coefficient of each lens in the above Table 6-2.
- the image side surface and the object side surface of the second lens G21 are respectively even-order aspheric surfaces.
- the lens provided by this embodiment includes two even-order aspheric surfaces.
- the sag Z of all even-order aspheric surfaces can be limited by the following formula, but not limited to: the following formula.
- Z represents the sag height of the aspheric surface
- r is the radial coordinate of the aspheric surface
- C is the spherical curvature of the aspheric surface vertex.
- Fig. 18a shows the axial aberration curve when the lens structure shown in Fig. 17 is adopted and the above-mentioned Table 6-1, Table 6-2 and Table 6-3 are used.
- the five curves shown in Figure 18a are the axial aberration curves with the design wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm respectively. It can be seen from Figure 18a that the axial aberration of light with different wavelengths is controlled within a very within a small range.
- Figure 18b shows the lateral aberration curves when the lens structure shown in Figure 17 is adopted and the above-mentioned Table 6-1, Table 6-2 and Table 6-3 are used.
- the five curves shown in Figure 18b are the lateral aberration curves with the design wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively.
- the dotted line represents the diffraction limit range. It can be seen from Figure 18b that the lateral aberration of light with different wavelengths in the diffraction range.
- the lens group G2 has four lenses, and the three lenses are the second lens G21, the third lens G22 and the fourth lens G23 arranged in sequence along the second optical axis X2, As well as the fifth lens G24, the object side of the second lens G21 is opposite to the image side of the prism G12.
- the lens also includes an IR filter G3.
- the object side surface of the fifth lens G24 is a convex surface.
- the ratio of the focal length f1 of the refractive prism group G1 to the total focal length f of the lens is:
- the second lens G21 has negative refractive power, and the ratio of the focal length f2 of the second lens G21 to the total focal length f of the lens is:
- the third lens G22 has negative refractive power, and the ratio of the focal length f3 of the third lens G22 to the total focal length f of the lens is:
- the fourth lens G23 has negative refractive power, and the ratio of the focal length f4 of the fourth lens G23 to the total focal length f of the lens is:
- the fifth lens G24 has positive refractive power, and the ratio of the focal length f5 of the fifth lens G24 to the total focal length f of the lens is:
- the ratio of the total track length (TTL) of the lens to the total focal length f of the lens is:
- the ratio of the image height of the lens to the overall focal length f of the lens is:
- the following table 7-1 shows the optical parameters of the lens.
- the following table 7-2 shows the optical parameters of each optical device in the lens.
- Table 7-3 is the aspheric coefficient of each lens in the above Table 7-2.
- the image side surface and the object side surface of the second lens G21 are respectively even-order aspheric surfaces.
- the lens provided by this embodiment includes two aspheric surfaces.
- the sag Z of all even-order aspheric surfaces can be limited by the following formula, but not limited to the following formula .
- Z represents the sag height of the aspheric surface
- r is the radial coordinate of the aspheric surface
- C is the spherical curvature of the aspheric surface vertex.
- Fig. 20a shows the axial aberration curve when the lens structure shown in Fig. 19 is adopted and the above-mentioned Table 7-1, Table 7-2 and Table 7-3 are used.
- the five curves shown in Figure 20a are the axial aberration curves with the design wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm respectively. It can be seen from Figure 20a that the axial aberration of light with different wavelengths is controlled within a very within a small range.
- Figure 20b shows the lateral aberration curve when the lens structure shown in Figure 19 is adopted and the above-mentioned Table 7-1, Table 7-2 and Table 7-3 are used.
- the five curves shown in Figure 20b are the lateral aberration curves with the design wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively.
- the dotted line represents the diffraction limit range. It can be seen from Figure 20b that the lateral aberration of light with different wavelengths in the diffraction range.
- Figure 20c shows the distortion aberration curve when the lens structure shown in Figure 19 is adopted and the above Table 7-1, Table 7-2 and Table 7-3 are used, and Figure 20d is the ideal distortion aberration curve. It can be seen from the comparison of Fig. 20c and Fig. 20d that the distortion aberration of light of different wavelengths is within the range of naked eye recognition.
- the lens 21 is a structural diagram of another lens, the lens group G2 has four lenses, and the three lenses are a second lens G21, a third lens G22 and a fourth lens G23 arranged in sequence along the second optical axis X2, As well as the fifth lens G24, the object side of the second lens G21 is opposite to the image side of the prism G12.
- the lens also includes an IR filter G3.
- the image side surface of the fifth lens G24 is a convex surface.
- the ratio of the focal length f1 of the refractive prism group G1 to the total focal length f of the lens is:
- the second lens G21 has positive refractive power, and the ratio of the focal length f2 of the second lens G21 to the total focal length f of the lens is:
- the third lens G22 has negative refractive power, and the ratio of the focal length f3 of the third lens G22 to the total focal length f of the lens is:
- the fourth lens G23 has negative refractive power, and the ratio of the focal length f4 of the fourth lens G23 to the total focal length f of the lens is:
- the fifth lens G24 has positive refractive power, and the ratio of the focal length f5 of the fifth lens G24 to the total focal length f of the lens is:
- the ratio of the total track length (TTL) of the lens to the total focal length f of the lens is:
- the ratio of the image height of the lens to the overall focal length f of the lens is:
- the following table 8-1 shows the optical parameters of the lens.
- Table 8-2 shows the optical parameters of each optical device in the lens.
- the following Table 8-3 is the aspheric coefficient of each lens in the above Table 8-2.
- the image side surface and the object side surface of the second lens G21 are respectively even-order aspheric surfaces.
- the lens provided by this embodiment includes two aspheric surfaces.
- the sag Z of all even-order aspheric surfaces can be limited by the following formula, but not limited to the following formula .
- Z represents the sag height of the aspheric surface
- r is the radial coordinate of the aspheric surface
- C is the spherical curvature of the aspheric surface vertex.
- Fig. 22a shows the axial aberration curve when the lens structure shown in Fig. 21 is adopted and the above-mentioned Table 8-1, Table 8-2 and Table 8-3 are used.
- the five curves shown in Figure 22a are the axial aberration curves with the design wavelengths of 850nm, 810nm, 555nm, 510nm and 470nm respectively. It can be seen from Figure 22a that the axial aberration of light with different wavelengths is controlled within a very within a small range.
- Figure 22b shows the lateral aberration curves when the lens structure shown in Figure 21 is adopted and the above-mentioned Table 8-1, Table 8-2 and Table 8-3 are used.
- the five curves shown in Figure 22b are the lateral aberration curves with the design wavelengths of 850nm, 810nm, 555nm, 510nm and 470nm, respectively.
- the dotted line represents the diffraction limit range. It can be seen from Figure 22b that the lateral aberrations of light with different wavelengths in the diffraction range.
- Figure 22c shows the distortion aberration curve when the lens structure shown in Figure 21 is used and the above Table 8-1, Table 8-2 and Table 8-3 are used, and Figure 22d is the ideal distortion aberration curve. It can be seen from the comparison of Fig. 22c and Fig. 22d that the distortion aberration of light of different wavelengths is within the range of naked eye recognition.
- the lens group G2 has four lenses, and the three lenses are the second lens G21, the third lens G22 and the fourth lens G23 arranged in sequence along the second optical axis X2, As well as the fifth lens G24, the object side of the second lens G21 is opposite to the image side of the prism G12.
- the lens also includes a prism group G3 and an IR filter G4.
- the fourth lens G23 is DOE.
- the ratio of the focal length f1 of the refractive prism group G1 to the total focal length f of the lens is:
- the second lens G21 has negative refractive power, and the ratio of the focal length f2 of the second lens G21 to the total focal length f of the lens is:
- the third lens G22 has positive refractive power, and the ratio of the focal length f3 of the third lens G22 to the total focal length f of the lens is:
- the fourth lens G23 has positive refractive power, and the ratio of the focal length f4 of the fourth lens G23 to the total focal length f of the lens is:
- the fifth lens G24 has negative refractive power, and the ratio of the focal length f5 of the fifth lens G24 to the total focal length f of the lens is:
- the ratio of the total track length (TTL) of the lens to the total focal length f of the lens is:
- the ratio of the image height of the lens to the overall focal length f of the lens is:
- the following table 9-1 shows the optical parameters of the lens.
- Table 9-2 shows the optical parameters of each optical device in the lens.
- Table 9-3 is the aspheric coefficient of each lens in the above Table 9-2.
- the image side surface and the object side surface of the second lens G21 are respectively even-order aspheric surfaces, and the object side surface of the fourth lens G23 is a binary diffraction surface (Binary 2).
- Table 9-4 shows the diffraction surface coefficients of the fourth lens G23 in the above Table 9-3.
- the lens provided by this embodiment includes three aspheric surfaces.
- the sag Z of all even-order aspheric surfaces can also be limited by the following formula, but not limited to the following: formula.
- Z represents the sag height of the aspheric surface
- r is the radial coordinate of the aspheric surface
- C is the spherical curvature of the aspheric surface vertex.
- the vector height Z2 of the binary diffraction surface can be defined by the following formula:
- M represents the diffraction order
- p is the phase distribution power
- A is the phase distribution coefficient
- C is the spherical curvature of the aspheric vertex
- r is the radial coordinate of the aspheric surface.
- Figure 24a shows the axial aberration curve when the lens structure shown in Figure 23 is used and the data shown in Table 9-1, Table 9-2, Table 9-3 and Table 9-4 are used.
- the five curves shown in Figure 24a are the axial aberration curves with the design wavelengths of 650nm, 624nm, 555nm, 524nm and 470nm respectively. It can be seen from Figure 24a that the axial aberration of light with different wavelengths is controlled within a very within a small range.
- Figure 24b shows the lateral aberration curve when the lens structure shown in Figure 23 is used and the data shown in Table 9-1, Table 9-2, Table 9-3 and Table 9-4 are used.
- the five curves shown in Figure 24b are the lateral aberration curves with design wavelengths of 650nm, 624nm, 555nm, 524nm and 470nm, respectively, and the dotted line represents the diffraction limit range. It can be seen from Figure 24b that the lateral aberrations of light with different wavelengths in the diffraction range.
- Figure 24c shows the distortion aberration curve when using the lens structure shown in Figure 23 and the data shown in Table 9-1, Table 9-2, Table 9-3 and Table 9-4 above, and Figure 24d is ideal Distortion aberration curve. It can be seen from the comparison of Fig. 24c and Fig. 24d that the distortion aberration of light of different wavelengths is within the range of naked eye recognition.
- the lens group G2 has four lenses, and the three lenses are the second lens G21, the third lens G22 and the fourth lens G23 arranged in sequence along the second optical axis X2, As well as the fifth lens G24, the object side of the second lens G21 is opposite to the image side of the prism G12.
- the lens also includes flat glass G3 and IR filter G4.
- the fourth lens G23 is DOE.
- the fifth lens G24 is a zoom liquid lens.
- the image side surface of the fifth lens G24 is a convex surface.
- the ratio of the focal length f1 of the refractive prism group G1 to the total focal length f of the lens is:
- the second lens G21 has negative refractive power, and the ratio of the focal length f2 of the second lens G21 to the total focal length f of the lens is:
- the third lens G22 has positive refractive power, and the ratio of the focal length f3 of the third lens G22 to the total focal length f of the lens is:
- the fourth lens G23 has negative refractive power, and the ratio of the focal length f4 of the fourth lens G23 to the total focal length f of the lens is:
- the fifth lens G24 has positive refractive power, and the ratio of the focal length f5 of the fifth lens G24 to the total focal length f of the lens is:
- the aperture of this lens is 3.35 ⁇ F/# ⁇ 3.7.
- the ratio of the total track length (TTL) of the lens to the total focal length f of the lens is:
- the ratio of the image height of the lens to the overall focal length f of the lens is:
- the following table 10-1 shows the optical parameters of the lens.
- the following table 10-2 shows the optical parameters of each optical device in the lens.
- Table 10-3 shows the aspheric coefficients of each lens in the above Table 10-2.
- the image side surface and the object side surface of the second lens G21 are respectively even-order aspheric surfaces.
- the sag Z of all even-order aspheric surfaces can be defined by the following formula, but is not limited to the following formula.
- Z represents the sag height of the aspheric surface
- r is the radial coordinate of the aspheric surface
- C is the spherical curvature of the aspheric surface vertex.
- Fig. 26a shows the axial aberration curve when the lens structure shown in Fig. 25 is adopted, and the above-mentioned Table 10-1, Table 10-2, Table 10-3, and Table 10-4 are used.
- the five curves shown in Figure 26a are the axial aberration curves with the design wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm respectively. It can be seen from Figure 26a that the axial aberration of light with different wavelengths is controlled within a very within a small range.
- Figure 26b shows the lateral aberration curve when the lens structure shown in Figure 25 is adopted, and the above-mentioned Table 10-1, Table 10-2, Table 10-3, and Table 10-4 are used.
- the five curves shown in Figure 26b are the lateral aberration curves with the design wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively, and the dotted line represents the diffraction limit range. It can be seen from Figure 26b that the lateral aberration of light with different wavelengths in the diffraction range.
- Figure 26c shows the distortion aberration curve when the lens structure shown in Figure 25 is adopted, and the above-mentioned Table 10-1, Table 10-2, Table 10-3, and Table 10-4 are used, and Figure 26d is the ideal distortion image poor curve. It can be seen from the comparison of Fig. 26c and Fig. 26d that the distortion aberration of light of different wavelengths is within the range of naked eye recognition.
- the lens group G2 includes four lenses, and such a lens structure may be referred to as a combined four-piece lens group.
- the ratio of the focal length f2 of the second lens to the total focal length f of the lens is:
- the lens group G2 has five lenses, and the five lenses are the second lens G21, the third lens G22 and the fourth lens G23 arranged in sequence along the second optical axis X2, As well as the fifth lens G24, and the sixth lens G25, the object side of the second lens G21 is opposite to the image side of the prism G12.
- the lens also includes an IR filter G3.
- the image side surface of the fifth lens G24 is a convex surface
- the image side surface of the sixth lens G25 is a convex surface.
- the ratio of the focal length f1 of the refractive prism group G1 to the total focal length f of the lens is:
- the second lens G21 has positive refractive power, and the ratio of the focal length f2 of the second lens G21 to the total focal length f of the lens is:
- the third lens G22 has negative refractive power, and the ratio of the focal length f3 of the third lens G22 to the total focal length f of the lens is:
- the fourth lens G23 has negative refractive power, and the ratio of the focal length f4 of the fourth lens G23 to the total focal length f of the lens is:
- the fifth lens G24 has positive refractive power, and the ratio of the focal length f5 of the fifth lens G24 to the total focal length f of the lens is:
- the sixth lens G25 has negative refractive power, and the ratio of the focal length f6 of the sixth lens G25 to the total focal length f of the lens is:
- the ratio of the total track length (TTL) of the lens to the total focal length f of the lens is:
- the ratio of the image height of the lens to the overall focal length f of the lens is:
- the following table 11-1 shows the optical parameters of the lens.
- Table 11-2 shows the optical parameters of each optical device in the lens.
- Table 11-3 shows the aspheric coefficients of each lens in the above Table 11-2.
- the lens contains a total of 10 Extended Aspheres (EA).
- the sag Z of all extended aspheric surfaces can also be limited by the following formula, but is not limited to the following formula.
- Z represents the sag height of the aspheric surface
- r is the radial coordinate of the aspheric surface
- C is the spherical curvature of the aspheric surface vertex
- a 1 , a 2 , a 3 , etc. are the aspheric surface coefficients.
- Figure 28a shows the axial aberration curve when the lens structure shown in Figure 27 is adopted and the data shown in Table 11-1, Table 11-2 and Table 11-3 are used.
- the five curves shown in Figure 28a are the axial aberration curves with design wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm respectively. It can be seen from Figure 28a that the axial aberration of light with different wavelengths is controlled within a very within a small range.
- Figure 28b shows the lateral aberration curve when the lens structure shown in Figure 27 is used and the data shown in Table 11-1, Table 11-2 and Table 11-3 are used.
- the five curves shown in Figure 28b are the lateral aberration curves with design wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively.
- the dotted line represents the diffraction limit range. It can be seen from Figure 28b that the lateral aberration of light with different wavelengths in the diffraction range.
- Figure 28c shows the distortion aberration curve when using the lens structure shown in Figure 27 and the data shown in Table 11-1, Table 11-2 and Table 11-3 above, and Figure 28d is the ideal distortion aberration curve. It can be seen from the comparison of Fig. 28c and Fig. 28d that the distortion aberration of light of different wavelengths is within the range of naked eye recognition.
- the lens group G2 has five lenses, and the five lenses are the second lens G21, the third lens G22 and the fourth lens G23 arranged in sequence along the second optical axis X2, As well as the fifth lens G24, and the sixth lens G25, the object side of the second lens G21 is opposite to the image side of the prism G12.
- the lens also includes an IR filter G3.
- the image side surface of the fifth lens G24 is a convex surface.
- the ratio of the focal length f1 of the refractive prism group G1 to the total focal length f of the lens is:
- the second lens G21 has positive refractive power, and the ratio of the focal length f2 of the second lens G21 to the total focal length f of the lens is:
- the third lens G22 has negative refractive power, and the ratio of the focal length f3 of the third lens G22 to the total focal length f of the lens is:
- the fourth lens G23 has negative refractive power, and the ratio of the focal length f4 of the fourth lens G23 to the total focal length f of the lens is:
- the fifth lens G24 has positive refractive power, and the ratio of the focal length f5 of the fifth lens G24 to the total focal length f of the lens is:
- the sixth lens G25 has negative refractive power, and the ratio of the focal length f6 of the sixth lens G25 to the total focal length f of the lens is:
- the ratio of the total track length (TTL) of the lens to the total focal length f of the lens is:
- the ratio of the image height of the lens to the overall focal length f of the lens is:
- the following table 12-1 shows the optical parameters of the lens.
- Table 12-2 shows the optical parameters of each optical device in the lens.
- Table 12-3 shows the aspheric coefficients of each lens in the above Table 12-2.
- the lens contains a total of 10 extended aspheres.
- the sag Z of all extended aspheric surfaces can also be limited by the following formula, but is not limited to the following formula.
- Z represents the sag height of the aspheric surface
- r is the radial coordinate of the aspheric surface
- C is the spherical curvature of the aspheric surface vertex
- a 1 , a 2 , a 3 , etc. are the aspheric surface coefficients.
- Figure 30a shows the axial aberration curve when the lens structure shown in Figure 29 is used and the data shown in Table 12-1, Table 12-2 and Table 12-3 are used.
- the five curves shown in Figure 30a are the axial aberration curves with the design wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm respectively. It can be seen from Figure 30a that the axial aberrations of light with different wavelengths are controlled at a very high level. within a small range.
- Figure 30b shows the lateral aberration curve when the lens structure shown in Figure 29 is used and the data shown in Table 12-1, Table 12-2 and Table 12-3 are used.
- the five curves shown in Figure 30b are the lateral aberration curves with design wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively.
- the dotted line represents the diffraction limit range. It can be seen from Figure 30b that the lateral aberrations of light with different wavelengths in the diffraction range.
- Figure 30c shows the distortion aberration curve when the lens structure shown in Figure 29 is used and the data shown in Table 12-1, Table 12-2 and Table 12-3 are used, and Figure 30d is the ideal distortion aberration curve. It can be seen from the comparison of Fig. 30c and Fig. 30d that the distortion aberration of light of different wavelengths is within the range of naked eye recognition.
- the lens group G2 has five lenses, and the five lenses are the second lens G21, the third lens G22 and the fourth lens G23 arranged in sequence along the second optical axis X2, As well as the fifth lens G24, and the sixth lens G25, the object side of the second lens G21 is opposite to the image side of the prism G12.
- the lens further includes an IR filter G3, and in addition, a zoom liquid lens G0, which is arranged on one side of the image side surface of the first lens G11.
- the image side surface of the sixth lens G25 is a convex surface.
- the ratio of the focal length f1 of the refractive prism group G1 to the total focal length f of the lens is:
- the second lens G21 has negative refractive power, and the ratio of the focal length f2 of the second lens G21 to the total focal length f of the lens is:
- the third lens G22 has positive refractive power, and the ratio of the focal length f3 of the third lens G22 to the total focal length f of the lens is:
- the fourth lens G23 has negative refractive power, and the ratio of the focal length f4 of the fourth lens G23 to the total focal length f of the lens is:
- the fifth lens G24 has negative refractive power, and the ratio of the focal length f5 of the fifth lens G24 to the total focal length f of the lens is:
- the sixth lens G25 has positive refractive power, and the ratio of the focal length f6 of the sixth lens G25 to the total focal length f of the lens is:
- the ratio of the total track length (TTL) of the lens to the total focal length f of the lens is:
- the ratio of the image height of the lens to the overall focal length f of the lens is:
- the following table 13-1 shows the optical parameters of the lens.
- Table 13-2 shows the optical parameters of each optical device in the lens.
- Table 11-3 shows the aspheric coefficients of each lens in the above Table 11-2.
- the lens contains a total of 10 extended aspheres.
- the sag Z of all extended aspheric surfaces can also be limited by the following formula, but is not limited to the following formula.
- Z represents the sag height of the aspheric surface
- r is the radial coordinate of the aspheric surface
- C is the spherical curvature of the aspheric surface vertex
- a 1 , a 2 , a 3 , etc. are the aspheric surface coefficients.
- Figure 32a shows the axial aberration curve when the lens structure shown in Figure 31 is adopted and the data shown in Table 13-1, Table 13-2 and Table 13-3 are used.
- the five curves shown in Figure 32a are the axial aberration curves with the design wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm respectively. It can be seen from Figure 32a that the axial aberration of light with different wavelengths is controlled within a very within a small range.
- Figure 32b shows the lateral aberration curve when the lens structure shown in Figure 31 is used and the data shown in Table 13-1, Table 13-2 and Table 13-3 are used.
- the five curves shown in Figure 32b are the lateral aberration curves with the design wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively.
- the dotted line represents the diffraction limit range. It can be seen from Figure 32b that the lateral aberration of light with different wavelengths in the diffraction range.
- Figure 32c shows the distortion aberration curve when using the lens structure shown in Figure 31 and the data shown in Table 13-1, Table 13-2 and Table 13-3 above, and Figure 32d is the ideal distortion aberration curve. It can be seen from the comparison of Fig. 32c and Fig. 32d that the distortion aberration of light of different wavelengths is within the range of naked eye recognition.
- the lens group G2 has five lenses, and the five lenses are the second lens G21, the third lens G22 and the fourth lens G23 arranged in sequence along the second optical axis X2, As well as the fifth lens G24, and the sixth lens G25, the object side of the second lens G21 is opposite to the image side of the prism G12.
- the lens also includes an IR filter G3.
- the image side surface of the sixth lens G25 is a convex surface.
- the ratio of the focal length f1 of the refractive prism group G1 to the total focal length f of the lens is:
- the second lens G21 has negative refractive power, and the ratio of the focal length f2 of the second lens G21 to the total focal length f of the lens is:
- the third lens G22 and the fourth lens G23 form a cemented lens, the cemented lens has negative refractive power, and the ratio of the focal length f3 of the cemented lens to the total focal length f of the lens is:
- the fifth lens G24 has negative refractive power, and the ratio of the focal length f5 of the fifth lens G24 to the total focal length f of the lens is:
- the sixth lens G25 has positive refractive power, and the ratio of the focal length f6 of the sixth lens G25 to the total focal length f of the lens is:
- the ratio of the total track length (TTL) of the lens to the total focal length f of the lens is:
- the ratio of the image height of the lens to the overall focal length f of the lens is:
- the following table 14-1 shows the optical parameters of the lens.
- the following table 14-2 shows the optical parameters of each optical device in the lens.
- the following Table 14-3 shows the aspheric coefficients of the lenses in the above Table 14-2.
- the image side surface and the object side surface of the second lens G21 are respectively even-order aspheric surfaces.
- Table 14-4 shows the diffraction surface coefficients of the fourth lens G23.
- the lens provided by this embodiment includes two aspheric surfaces.
- the sag Z of all even-order aspheric surfaces can also be defined by the following formula, but not limited to the following formula.
- Z represents the sag height of the aspheric surface
- r is the radial coordinate of the aspheric surface
- C is the spherical curvature of the aspheric surface vertex.
- the vector height Z2 of the binary diffraction surface can be defined by the following formula:
- M represents the diffraction order
- p is the phase distribution power
- A is the phase distribution coefficient
- C is the spherical curvature of the aspheric vertex
- r is the radial coordinate of the aspheric surface.
- Figure 34a shows the axial aberration curve when the lens structure shown in Figure 33 is used and the data shown in Table 14-1, Table 14-2, Table 14-3 and Table 14-4 are used.
- the five curves shown in Figure 34a are the axial aberration curves with design wavelengths of 650nm, 634nm, 555nm, 534nm and 470nm respectively. It can be seen from Figure 34a that the axial aberrations of light with different wavelengths are controlled within a very within a small range.
- Figure 34b shows the lateral aberration curve when the lens structure shown in Figure 33 is used and the data shown in Table 14-1, Table 14-2, Table 14-3 and Table 14-4 are used.
- the five curves shown in Figure 34b are the lateral aberration curves with the design wavelengths of 650nm, 634nm, 555nm, 534nm and 470nm, respectively.
- the dotted line represents the diffraction limit range. It can be seen from Figure 34b that the lateral aberration of light with different wavelengths in the diffraction range.
- Figure 34c shows the distortion aberration curve when using the lens structure shown in Figure 33 and the data shown in Table 14-1, Table 14-2, Table 14-3 and Table 14-4 above, and Figure 34d is ideal Distortion aberration curve. It can be seen from the comparison of Fig. 34c and Fig. 34d that the distortion aberration of light of different wavelengths is within the range of naked eye recognition.
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Abstract
一种镜头(301)、摄像头模组(30)及电子设备,涉及光学成像技术领域。主要目的是提供一种具有长焦功能、可以减小高度尺寸、提高成像质量的镜头(301)。沿物场至像场方向,该镜头(301)包括第一透镜(G11)、棱镜(G12)和多个透镜,第一透镜(G11)具有正光焦度,且第一透镜(G11)的物侧面为凸面,棱镜(G12)的物侧面与第一透镜(G11)的像侧面相接触,棱镜(G12)将从第一透镜(G11)接收的光由第一光轴(X1)折射在与第一光轴(X1)相交的第二光轴(X2),多个透镜包括至少三个透镜,多个透镜沿第二光轴(X2)依次布设,多个透镜中的靠近棱镜(G12)的透镜的物侧面和像侧面均为非球面,多个透镜中的靠近镜头(301)的像场的透镜的像侧面为凸面。
Description
本申请要求于2021年02月10日提交国家知识产权局、申请号为202110185646.1、发明名称为“一种镜头、摄像头模组及电子设备”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
本申请涉及光学成像技术领域,尤其涉及一种镜头、摄像头模组及电子设备。
随着手机、平板电脑等具有拍摄、录制影像功能的电子设备的发展,小型化、薄型化已经成为这些电子设备的发展趋势,另外,具有长焦功能的电子设备越来越被青睐。
图1所示的是现有的一种应用在手机、平板电脑等电子设备中的具有长焦的镜头的部分结构图,该镜头为了满足小型化、薄型化需求,沿各个透镜的高度方向(如图1中的I方向)进行切割(cut),以使得该镜头的高度减小,这样的技术可以被称为I-cut工艺,图1中的虚线M示为切割线。
但是,如图1所示,沿高度方向对该镜头进行切割后,会使得该镜头的进光量减少,造成在该镜头所成的像在子午方向(T方向)和弧矢方向(S方向)像质不均,降低成像质量,进而劣化该镜头的使用性能。
发明内容
本申请提供一种镜头、摄像头模组及电子设备,主要目的是提供一种具有长焦功能、可以减小高度尺寸、提高成像质量的镜头。
为达到上述目的,本申请采用如下技术方案:
第一方面,本申请提供了一种镜头,沿物场至像场方向,该镜头包括第一透镜、棱镜和多个透镜,第一透镜具有正光焦度,且第一透镜的物侧面为凸面,棱镜的物侧面与第一透镜的像侧面相接触,棱镜将从第一透镜接收的光由第一光轴折射在与第一光轴相交的第二光轴,多个透镜包括至少三个透镜,多个透镜沿第二光轴依次布设,多个透镜中的靠近棱镜的透镜的物侧面和像侧面均为非球面,多个透镜中的靠近镜头的像场的透镜的像侧面为凸面。
本申请提供的镜头,由于具有物侧面为凸面的第一透镜,以及用于与第一透镜相连接的棱镜,这样的话,棱镜可以将从第一透镜聚集的光从第一光轴折射至第二光轴上,为整个镜头提供了折弯光轴,相比现有技术,在不降低进光量的情况下,可以减小镜头的高度尺寸,缩短镜头的长度尺寸,符合小型化、薄型化设计需求。
另外,通过设置在第二光轴上的至少三个透镜,以及将多个透镜中的靠近镜头的像场的透镜的像侧面设计为凸面的话,可以将光线进行会聚,提高成像质量。除此之外,多个透镜中的靠近棱镜的透镜的物侧面和像侧面均为非球面,可以消减相差,也可以提高成像质量,并且该镜头可以满足长焦需求。
在第一方面可能的实现方式中,多个透镜中的至少一个透镜为衍射光学元件。通过采用衍射光学元件,进入光学衍射元件的光线可以改变光路,从而将不同波长范围的光线会聚到相同的交点上,从而可以校正色差,达到优化成像质量的目的。
在第一方面可能的实现方式中,多个透镜中的至少一个透镜为第一变焦液体透镜。
在第一方面可能的实现方式中,镜头还包括第二变焦液体透镜,第二变焦液体透镜设置在第一透镜的靠近物场的一侧。
通过在该镜头中设置变焦液体透镜,变焦液体透镜具有变焦功能,可以使该镜头的总焦距范围更大,进一步扩大该镜头的应用范围。
在第一方面可能的实现方式中,多个透镜包括:具有负光焦度的第二透镜、具有正光焦度的第三透镜,以及具有光焦度的第四透镜;第二透镜、第三透镜和第四透镜沿第二光轴依次布设。这样形成的镜头可以被称为折光棱镜组(包括第一透镜和棱镜)与三片透镜组合的镜头。
在该实施方式中,具有负光焦度的第二透镜有助于校正镜头的场曲,以使得该镜头的成像面更平坦,第三透镜具有正光焦度,从而可以分散光线在第四透镜的物侧面的汇聚能力,避免该镜头产生过大的像差。
在第一方面可能的实现方式中,多个透镜包括:具有光焦度的第二透镜、具有光焦度的第三透镜、具有光焦度的第四透镜,以及具有光焦度的第五透镜;第二透镜、第三透镜和第四透镜,以及第五透镜沿第二光轴依次布设。这样形成的镜头可以被称为折光棱镜组(包括第一透镜和棱镜)与四片透镜组合的镜头。
在第一方面可能的实现方式中,多个透镜包括具有正光焦度的第二透镜、具有负光焦度的第三透镜、具有负光焦度的第四透镜、具有正光焦度的第五透镜,以及具有负光焦度的第六透镜;第二透镜、第三透镜、第四透镜和第五透镜,以及第六透镜沿第二光轴依次布设。这样形成的镜头可以被称为折光棱镜组(包括第一透镜和棱镜)与五片透镜组合的镜头。
在该实施方式中,第二透镜为正光焦度,第三透镜采用负光焦度,具有负光焦度的第三透镜有助于校正从第二透镜透射的光线的场曲,以使得成像更平坦,第四透镜具有负光焦度,第五透镜为正光焦度,第四透镜可以分散光线,再经第五透镜的校正,提升成像质量。
在第一方面可能的实现方式中,镜头的总焦距f为:14mm≤f≤33mm。将该镜头的总焦距设计在14mm至33mm之间,以使该镜头成为长焦镜头。
在第一方面可能的实现方式中,棱镜由玻璃材料制得,第一透镜由塑料材料制得,第一透镜通过粘结层粘结在棱镜上。这样形成的折光棱镜组(包括第一透镜和棱镜)为玻塑混合折光棱镜组。
在第一方面可能的实现方式中,棱镜和第一透镜均由塑料材料制得,或者棱镜和第一透镜均由玻璃材料制得,且棱镜和第一透镜呈一体结构。这样形成的折光棱镜组(包括第一透镜和棱镜)为玻璃一体成型折光棱镜组或者注塑一体成型折光棱镜组。
第二方面,本申请还提供了一种摄像头模组,该摄像头模组包括图像传感器和上述第一方面任一实现方式中的镜头,图像传感器的感光面与镜头中的成像面相对。
本申请实施例提供的摄像头模组包括第一方面实施例的镜头,由于该镜头的棱镜可以将从第一透镜聚集的光从第一光轴折射至第二光轴上,为整个镜头提供了折弯光轴,在不降低进光量的情况下,相比现有技术,可以减小镜头的高度尺寸,进而可以减小整个摄像头模组的高度尺寸。还有,由于多个透镜中的靠近棱镜的透镜的物侧面和像侧面均为非球面,以及多个透镜中的靠近镜头的像场的透镜的像侧面为凸面,这两个特征相配合,可以优化成像质量,提高该摄像头模组的成像质量。
第三方面,本申请还提供了一种电子设备,该电子设备包括处理单元和上述第二方面实现方式中的摄像头模组,处理单元与摄像头模组中的图像传感器连接。
本申请实施例提供的电子设备包括第二方面实施例的摄像头模组,因此本申请实施例提供的电子设备与上述技术方案的摄像头模组能够解决相同的技术问题,并达到相同的预期效果。
图1为现有技术中一种镜头的结构示意图;
图2为一种镜头的部分结构示意图;
图3a为本申请实施例提供的一种电子设备的结构示意图;
图3b为图3a的爆炸图;
图4为本申请实施例提供的一种摄像头模组的结构示意图;
图5为本申请实施例提供的一种镜头的结构示意图;
图6为图5所示的镜头的成像光路图;
图7为本申请实施例提供的一种变焦液体透镜的变焦原理示意图;
图8a为图5所示的镜头的轴向像差曲线图;
图8b为图5所示的镜头的横向像差曲线图;
图8c为图5所示的镜头的畸变像差曲线图;
图8d为图5所示的镜头的理想畸变像差曲线图;
图9为本申请实施例提供的一种镜头的结构示意图;
图10a为图9所示的镜头的轴向像差曲线图;
图10b为图9所示的镜头的横向像差曲线图;
图10c为图9所示的镜头的畸变像差曲线图;
图10d为图9所示的镜头的理想畸变像差曲线图;
图11为本申请实施例提供的一种镜头的结构示意图;
图12a为图11所示的镜头的轴向像差曲线图;
图12b为图11所示的镜头的横向像差曲线图;
图12c为图11所示的镜头的畸变像差曲线图;
图12d为图11所示的镜头的理想畸变像差曲线图;
图13为本申请实施例提供的一种镜头的结构示意图;
图14a为图13所示的镜头的轴向像差曲线图;
图14b为图13所示的镜头的横向像差曲线图;
图14c为图13所示的镜头的畸变像差曲线图;
图14d为图13所示的镜头的理想畸变像差曲线图;
图15为本申请实施例提供的一种镜头的结构示意图;
图16a为图15所示的镜头的轴向像差曲线图;
图16b为图15所示的镜头的横向像差曲线图;
图16c为图15所示的镜头的畸变像差曲线图;
图16d为图15所示的镜头的理想畸变像差曲线图;
图17为本申请实施例提供的一种镜头的结构示意图;
图18a为图17所示的镜头的轴向像差曲线图;
图18b为图17所示的镜头的横向像差曲线图;
图19为本申请实施例提供的一种镜头的结构示意图;
图20a为图19所示的镜头的轴向像差曲线图;
图20b为图19所示的镜头的横向像差曲线图;
图20c为图19所示的镜头的畸变像差曲线图;
图20d为图19所示的镜头的理想畸变像差曲线图;
图21为本申请实施例提供的一种镜头的结构示意图;
图22a为图21所示的镜头的轴向像差曲线图;
图22b为图21所示的镜头的横向像差曲线图;
图22c为图21所示的镜头的畸变像差曲线图;
图22d为图21所示的镜头的理想畸变像差曲线图;
图23为本申请实施例提供的一种镜头的结构示意图;
图24a为图23所示的镜头的轴向像差曲线图;
图24b为图23所示的镜头的横向像差曲线图;
图24c为图23所示的镜头的畸变像差曲线图;
图24d为图23所示的镜头的理想畸变像差曲线图;
图25为本申请实施例提供的一种镜头的结构示意图;
图26a为图25所示的镜头的轴向像差曲线图;
图26b为图25所示的镜头的横向像差曲线图;
图26c为图25所示的镜头的畸变像差曲线图;
图26d为图25所示的镜头的理想畸变像差曲线图;
图27为本申请实施例提供的一种镜头的结构示意图;
图28a为图27所示的镜头的轴向像差曲线图;
图28b为图27所示的镜头的横向像差曲线图;
图28c为图27所示的镜头的畸变像差曲线图;
图28d为图27所示的镜头的理想畸变像差曲线图;
图29为本申请实施例提供的一种镜头的结构示意图;
图30a为图29所示的镜头的轴向像差曲线图;
图30b为图29所示的镜头的横向像差曲线图;
图30c为图29所示的镜头的畸变像差曲线图;
图30d为图29所示的镜头的理想畸变像差曲线图;
图31为本申请实施例提供的一种镜头的结构示意图;
图32a为图31所示的镜头的轴向像差曲线图;
图32b为图31所示的镜头的横向像差曲线图;
图32c为图31所示的镜头的畸变像差曲线图;
图32d为图31所示的镜头的理想畸变像差曲线图;
图33为本申请实施例提供的一种镜头的结构示意图;
图34a为图33所示的镜头的轴向像差曲线图;
图34b为图33所示的镜头的横向像差曲线图;
图34c为图33所示的镜头的畸变像差曲线图;
图34d为图33所示的镜头的理想畸变像差曲线图。
附图标记:
10-壳体;11-边框;12-后盖;20-摄像头装饰盖;21-透光窗口;30-摄像头模组;301-镜头;302-图像传感器;40-主板;50-安装口;
1-驱动腔;2-光学腔;3-出光面;4-永磁铁;5-线圈。
为了方便理解技术方案,结合图2,下面对本申请涉及的技术术语进行解释。
像侧面、物侧面:是成像光线通过的范围,其中,成像光线包括了主光线(chief ray)及边缘光线(marginal ray)。像侧面为朝向像场的面,物侧面为朝向物场的面。
光焦度(focal power):等于像方光束会聚度与物方光束会聚度之差,它表征光学系统对入射平行光束的屈折本领。光焦度一般用φ表示,φ的数值越大,平行光束折得越厉害。φ>0时,屈折是会聚性的;φ<0时,屈折是发散性的。φ=0时,即为平面折射,也就是沿轴平行光束经折射后仍是沿轴平行光束,不出现屈折现象。
像高:镜头在成像面所成像的高度,称为像高,一般用IMH表示。
透镜的厚度(thickness):透镜在光轴上的厚度为该透镜的厚度。如图2所示,第一个透镜的厚度为T1。
光学总长(total track length,TTL):镜头中朝向物侧的第一个光学元件的物侧面至成像面在光轴上的长度为光学总长。如图2所述,第一个透镜的物侧面至成像面M在光轴上的长度S就为TTL。
光圈(aperture stop):是一个用来控制光线透过镜头,进入机身内感光面光量的装置。表达光圈大小常是用F/数值表示。比如,F/1.0。
下面结合附图,对本申请实施例中的技术方案进行详细描述。
本申请实施例提供了一种电子设备,该电子设备中具有拍摄、录制影像功能的摄像头模组。其中,上述电子设备可以包括手机(mobile phone)、平板电脑(pad)、智能穿戴产品(例如,智能手表、智能手环)、监控器、行车记录仪等。本申请实施例对上述电子设备的具体形式不做特殊限制。
请参阅图3a和图3b,图3a为本申请一些实施例提供的电子设备的立体图,图3b为图3a所示电子设备的爆炸图。在本实施例中,电子设备以手机为例。该电子设备包括壳体10、摄像头装饰盖20、摄像头模组30和主板40。
壳体10为由前盖板(图中未示出)、边框11和后盖12拼接形成的壳体结构,用于保护电子设备的内部电子器件和电路。
后盖12上设有安装口50,摄像头装饰盖20覆盖于安装口50处,摄像头装饰盖20用于保护电子设备的后置摄像头模组。在一些实施例中,摄像头装饰盖20凸出至壳体10的外部,这样,摄像头装饰盖20能够增加后置摄像头模组在电子设备内沿电子设备的厚度方向的安装空间。在另外一些实施方式中,摄像头装饰盖20也可以不凸出至壳体10的外部。
摄像头装饰盖20上设有至少一个透光窗口21,该至少一个透光窗口21用于允许景物光线射入后置摄像头模组。
摄像头模组30设置于壳体10内,摄像头模组30用于拍摄照片或视频。电子设备内,摄像头模组30的数量可以为一个,也可以为多个。当摄像头模组30的数量为一个时,摄像头模组30可以用作前置摄像头模组,也可以用作后置的主摄像头模组或者后置的副摄像头模组,其中,后置的副摄像头模组包括但不限于广角摄像头模组和长焦摄像头模组等等,在此不作具体限定。当摄像头模组30的数量为多个时,该多个摄像头模组30可以分别用作前置摄像头模组、后置的主摄像头模组、后置的副摄像头模组中的多个。图3a和图3b仅给出了摄像头模组30的数量为一个,且该摄像头模组30用作后置的主摄像头模组的示例,这并不能认为是对本申请构成的特殊限制。
结合图4,在摄像头模组30中,包括镜头301和图像传感器302,图像传感器302的感光面与镜头301的成像面相对,在主板上集成有与图像传感器302连接的处理单元,物场的景物通过镜头301生成的光学图像投射至图像传感器302的感光面上,然后转换为电信号,电信号再经过模数转换变换为数字图像信号,再送到处理器中进行加工处理,再传输至显示器(比如,手机屏),这样的话,就可以看到图像了。
在镜头301中,包括沿光轴布设的多个镜片,以及承载这些镜片的筒体。随着摄像头模组的小型化、薄型化设计,比如,结合图4,镜头301沿高度方向(如图4中的Z方向)的尺寸愈来愈小,还有,沿长度方向(如图4中的X方向)的尺寸愈来愈小,也就是该镜头的光学总成越来越小。另外,对可实现长焦的镜头也越来越青睐,还有,对成像质量、放大倍率的要求也越来越高。
下述结合附图对本申请给出的镜头进行详细说明。
图5示出的是一种镜头的结构图,从物场至像场方向,该镜头包括具有正光焦度的第一透镜G11、棱镜G12和多个透镜形成的透镜组G2,其中,棱镜G12将从第一透镜G11接收的光由第一光轴X1折射在与第一光轴X1相交的第二光轴X2,且第一透镜G11的物侧面为凸面,第一透镜G11的像侧面与棱镜G12的物侧面相接触,这里的第一透镜G11和棱镜G12形成折光棱镜组G1。
物侧面为凸面的第一透镜G11将从物场接收的光会聚后并透射至棱镜G12上,棱镜G12再将从第一透镜G11聚集的光从第一光轴X1折射至第二光轴X2上,为整个镜头提供了折弯光轴。这样的话,相比现有技术的I-cut工艺,在可以减小镜头沿Z方向尺寸的基础上,还可以保障进光量,保障成像质量。由于可以减小镜头沿Z方向的尺寸,进而,可以压缩整个摄像头模组在Z方向的尺寸。
这里的第一透镜G11附接在棱镜G12上,具有多种可实现的方式,在一些实施方式中,棱镜G12由玻璃(glass)材料制得,第一透镜G11由塑料(plastic)材料制得,第一透镜G11可以通过粘结层附接在棱镜G12上。在另外一些实施方式中,棱镜G12和第一透镜G11均由塑料材料制得,并且可以通过一体成型工艺制得,比如,注塑工艺。在另外一些实施方式中,棱镜G12和第一透镜G11均由玻璃材料制得,并且可以通过一体成型工艺制得。
本申请的第一光轴X1可以与第二光轴X2相垂直,比如,如图5所示。当然,可以是第 一光轴X1与第二光轴X2具有其他夹角。本申请对折弯光轴所折叠的角度不做限定。
还有,在本申请实施例提供的镜头中,镜头的总焦距f为:14mm≤f≤33mm。这样的话,可以提高光线会聚、提高成像质量,即使在长焦场景下,成像质量也是比较好的。
继续结合图5,多个透镜形成的透镜组G2包括至少三个透镜,多个透镜沿第二光轴X2依次布设,另外,透镜组G2的靠近镜头的像场的透镜的像侧面为凸面。
图5示例性的示出了透镜组G2包括三个沿第二光轴X2依次布设的透镜,这三个透镜分别是第二透镜G21、第三透镜G22和第四透镜G23,第四透镜G23的像侧面为凸面,图6为图5的光路图,将透镜组G2的靠近镜头的像场的透镜的像侧面设计为凸面的话,可以将从透镜组G2射出的光线进行会聚,提高成像质量。
另外,透镜组G2的靠近棱镜G12的透镜的物侧面和像侧面均为非球面(aspheric,ASP)。该非球面可以使得透镜容易制作成球面以外的形状,获得较多的控制变数,用以消减像差,提高成像质量,还可以缩减所需使用透镜的数目,因此可以有效降低光学总长度。
本申请给出的镜头中的透镜组G2中至少一个透镜为衍射光学元件(diffractive optical elements,DOE),这样一来,进入DOE内部的光线,可以改变光路,从而将不同波长范围的光线会聚到相同的交点上,从而校正棱镜G12在子午方向(T方向)和弧矢方向(S方向)的色差,达到优化成像质量、缩短光路总长的目的。
本申请给出的镜头中还包括至少一个变焦液体透镜,该透镜组G2中可以包括第一变焦液体透镜,在另外一些实施方式中,可以在第一透镜G11的靠近物场的一侧设置第二变焦液体透镜。
图7所示的是一种变焦液体透镜的结构示意图,变焦液体透镜包括相连通的驱动腔1和光学腔2,即驱动腔1内的液体和光学腔2内的液体可以在两个腔之间流动的,当光学腔2内的液体变化时,就会使出光面3的表面张力变化,以使出光面3的曲率变化。其中,永磁体4和线圈5形成动力源,用于驱动光学腔2内的液体和驱动腔1内的液体之间的流动。
图7所示的变焦液体透镜的工作原理可以解释为:比如,在第一时刻,线圈5接通第一电流后,由线圈5产生的磁场与永磁铁4产生的磁场相异,吸引永磁铁4向下移动,从而使得驱动腔1体积变小,驱动腔1内的液体流向光学腔2,引起出光面3发生形变形成第一曲率(实线所示),以使变焦液体透镜的焦距为F1。在第二时刻,线圈5接通第二电流后,由线圈5产生的磁场与永磁铁4产生的磁场相异,吸引永磁铁4向下移动,从而使得驱动腔1体积变小,驱动腔1内的液体流向光学腔2,引起出光面3发生形变形成第二曲率(虚线所示),以使变焦液体透镜的焦距为F2。
通过在镜头中设置变焦液体透镜,可以改变镜头的总焦距,起到变焦的作用,从而可以使该镜头适用于长焦、短焦场景。
另外,镜头还包括光圈,该光圈设置在第一透镜G11的靠近物场的一侧,通过光圈控制该镜头的进光量。
在一些可选择的实施方式中,该镜头还可以包括IR滤光片,IR滤光片可以减少或消除图像传感器上的环境噪声的干扰。
下述给出了具有三个透镜的透镜组G2的镜头的实施例、具有四个透镜的透镜组G2的镜头的实施例,以及具有五个透镜的透镜组G2的镜头的实施例。
图5所示的镜头中,透镜组G2具有三个透镜,三个透镜分别为沿第二光轴X2依次布设 的第二透镜G21、第三透镜G22和第四透镜G23,第二透镜G21的物侧面与棱镜G12的像侧面相对,第四透镜G23的像侧面为凸面,物侧面为凹面。另外,该镜头还包括平板玻璃G3,除此之外,该镜头还可以包括IR滤光片G4,平板玻璃G3设置在第四透镜G23的像侧面,IR滤光片G4设置在平板玻璃G3的像侧面。第四透镜G23的像侧面为凸面,物侧面为凹面。
下述表1-1为该镜头的光学参数。
光学参数 | |
系统焦距(F) | 28.17mm |
光圈数(F/#) | 3.79 |
像高(IMH) | 2.5mm |
光学总长(TTL) | 29.26mm |
设计波长 | 650nm,610nm,555nm,510nm,470nm |
表1-1
下述表1-2为该镜头中的各个光学器件的光学参数。
其中,Radius为曲率半径;Thickness为透镜厚度;nd为透镜的折射率;vd为透镜的阿贝数;Infinity为曲率半径无限大;G1中的R1为第一透镜G11的物侧面,G1中的R2为第一透镜G11的像侧面;G1中的A-01为棱镜G12的物侧面;G1中的B-03为棱镜G12的反射面;G1中的C-02为棱镜G12的像侧面,其余各个镜片中的R1为相对应镜片的物侧面,R2为相对应镜片的像侧面。
表1-2
下述表1-3为上述表1-2中各镜片的非球面系数。
其中,K为二次曲面常数,A
2、A
3、A
4、A
5、A
6、A
7和A
8分别为二阶非球面系数、三阶非球面系数、四阶非球面系数、五阶非球面系数、六阶非球面系数、七阶非球面系数、八阶非球面系数。
表1-3
由上述表1-3可以看出,该实施例提供的镜头包括两个非球面,且为偶次非球面,在本实施例中,所有的偶次非球面的矢高Z可利用下述公式进行限定,但不限于以下公式。
其中:Z代表非球面的矢高;r为非球面的径向坐标,C为非球面顶点球曲率。
图8a所示的为采用图5所示镜头结构,并采用上述表1-1、表1-2和表1-3所示数据时的轴向像差曲线,图8a的横坐标为轴向像差,单位可以为微米(μm),纵坐标为视场,单位可以是度数。图8a中所示的五条曲线分别为设计波长为650nm、610nm、555nm、510nm和470nm的轴向像差曲线,由该图8a可以看出,不同波长的光的轴向像差控制在-0.1μm至0.1μm以内,也就是在控制在一个很小的范围之内。
图8b所示的为采用图5所示镜头结构,并采用上述表1-1、表1-2和表1-3所示数据时的横向像差曲线,图8b的横坐标为横向像差,纵坐标为视场。图8b中所示的五条曲线分别为设计波长为650nm、610nm、555nm、510nm和470nm的横向像差曲线,虚线代表衍射极限范围,由该图8b可以看出,不同波长的光的横向像差在衍射极限范围内。
图8c所示的为采用图5所示镜头结构,并采用上述表1-1、表1-2和表1-3所示数据时的畸变像差曲线,图8d为理想畸变像差曲线,图8c和图8d的横坐标为畸变像差,纵坐标为 视场。由图8c和图8d对比可以看出,不同波长的光的畸变像差在肉眼识别范围内。可以这样理解,如图8d,理想畸变像差在0.05μm左右,如图8c,不同波长的光的畸变像差控制在小于0.01μm以内,这里的0.01μm由0.05μm×2%得到,也就是说,不同波长的光的畸变像差控制在理想畸变像差的2%以内。
图9所示的另一种镜头的结构图,透镜组G2具有三个透镜,三个透镜分别为沿第二光轴X2依次布设的第二透镜G21、第三透镜G22和第四透镜G23。另外,该镜头还包括平板玻璃G3,除此之外,该镜头还可以包括IR滤光片G4。
还有,第四透镜G23为DOE,且第四透镜G23的的像侧面为凸面,物侧面为凹面。在一些可选择的实施方式中,该第四透镜G23的物侧面与第三透镜G22相接触。
下述表2-1为该镜头的光学参数。
光学参数 | |
系统焦距(F) | 28.37mm |
光圈数(F/#) | 4.07 |
像高(IMH) | 2.7mm |
光学总长(TTL) | 36.37mm |
设计波长 | 650nm,610nm,555nm,510nm,470nm |
表2-1
下述表2-2为该镜头中的各个光学器件的光学参数。其中,每一个光学参数所代表的物理意义同上述表1-2,在此不在赘述。
表2-2
下述表2-3为上述表2-2中各镜片的非球面系数。其中,第二透镜G21的像侧面和物侧面分别为偶次非球面,第四透镜G23的物侧面为二元衍射面(Binary 2),第四透镜G23的像侧面为偶次非球面。
表2-3
下述表2-4为上述表2-3中第四透镜G23的物侧面的衍射面系数。
表2-4
由上述表2-3可以看出,该实施例提供的镜头包括三个偶次非球面,在本实施例中,所有的偶次非球面的矢高Z也可利用下述公式进行限定,但不限于以下公式。
其中:Z代表非球面的矢高;r为非球面的径向坐标,C为非球面顶点球曲率。
在本实施例中,二元衍射面矢高Z2可用下述公式进行限定:
其中,M代表衍射级次;p为相位分布幂,A为相位分布系数,C为非球面顶点球曲率,r为非球面的径向坐标。
图10a所示的为采用图9所示镜头结构,并采用上述表2-1、表2-2、表2-3和表2-4所示数据时的轴向像差曲线。图10a中所示的五条曲线分别为设计波长为650nm、610nm、555nm、510nm和470nm的轴向像差曲线,由该图10a可以看出,不同波长的光的轴向像差控制在一个很小的范围之内。
图10b所示的为采用图9所示镜头结构,并采用上述表2-1、表2-2、表2-3和表2-4所示数据时的横向像差曲线。图10b中所示的五条曲线分别为设计波长为650nm、610nm、555nm、510nm和470nm的横向像差曲线,虚线代表衍射极限范围,由该图10b可以看出,不同波长的光的横向像差在衍射范围内。
图10c所示的为采用图9所示镜头结构,并采用上述表2-1、表2-2、表2-3和表2-4所示数据时的畸变像差曲线,图10d为理想畸变像差曲线。由图10c和图10d对比可以看出,不同波长的光的畸变像差在肉眼识别范围内。
图11所示的另一种镜头的结构图,透镜组G2具有三个透镜,三个透镜分别为沿第二光轴X2依次布设的第二透镜G21、第三透镜G22和第四透镜G23。另外,该镜头还包括平板玻璃G3,除此之外,该镜头还可以包括IR滤光片G4。平板玻璃G3设置在第四透镜G23的像侧面,IR滤光片G4设置在平板玻璃G3的像侧面。第四透镜G23的像侧面为凸面,物侧面为凹面。
下述表3-1为该镜头的光学参数。
光学参数 | |
系统焦距(F) | 28.58mm |
光圈数(F/#) | 3.84 |
像高(IMH) | 2.5mm |
光学总长(TTL) | 33.67mm |
设计波长 | 650nm,610nm,555nm,510nm,470nm |
表3-1
下述表3-2为该镜头中的各个光学器件的光学参数。
表3-2
下述表3-3为上述表3-2中各镜片的非球面系数。
表3-3
由上述表3-3可以看出,该实施例提供的镜头包括两个偶次非球面,在本实施例中,所有的偶次非球面的矢高Z可利用下述公式进行限定,但不限于以下公式。
其中:Z代表非球面的矢高;r为非球面的径向坐标,C为非球面顶点球曲率。
图12a所示的为采用图11所示镜头结构,并采用上述表3-1、表3-2和表3-3时的轴向像差曲线。图12a中所示的五条曲线分别为设计波长为650nm、610nm、555nm、510nm和470nm的轴向像差曲线,由该图12a可以看出,不同波长的光的轴向像差控制在一个很小的范围之内。
图12b所示的为采用图11所示镜头结构,并采用上述表3-1、表3-2和表3-3时的横向像差曲线。图12b中所示的五条曲线分别为设计波长为650nm、610nm、555nm、510nm和470nm的横向像差曲线,虚线代表衍射极限范围,由该图12b可以看出,不同波长的光的横向像差在衍射范围内。
图12c所示的为采用图11所示镜头结构,并采用上述表3-1、表3-2和表3-3时的畸变像差曲线,图12d为理想畸变像差曲线。由图12c和图12d对比可以看出,不同波长的光的畸变像差在肉眼识别范围内。
图13所示的另一种镜头的结构图,透镜组G2具有三个透镜,三个透镜分别为沿第二光轴X2依次布设的第二透镜G21、第三透镜G22和第四透镜G23,第二透镜G21的物侧面与棱镜G12的像侧面相对。另外,该镜头还包括平板玻璃G3,除此之外,该镜头还可以包括IR滤光片G4。
下述表4-1为该镜头的光学参数。
光学参数 | |
系统焦距(F) | 28.35mm |
光圈数(F/#) | 3.87 |
像高(IMH) | 2.5mm |
光学总长(TTL) | 38.95mm |
设计波长 | 650nm,610nm,555nm,510nm,470nm |
表4-1
下述表4-2为该镜头中的各个光学器件的光学参数。
表4-2
下述表4-3为上述表4-2中各镜片的非球面系数。其中,第二透镜G21的像侧面和物侧面分别为偶次非球面。
表4-3
由上述表4-3可以看出,该实施例提供的镜头包括两个偶次非球面,在本实施例中,所有的偶次非球面的矢高Z可利用下述公式进行限定,但不限于以下公式。
其中:Z代表非球面的矢高;r为非球面的径向坐标,C为非球面顶点球曲率。
图14a所示的为采用图13所示镜头结构,并采用上述表4-1、表4-2和表4-3时的轴向像差曲线。图14a中所示的五条曲线分别为设计波长为650nm、610nm、555nm、510nm和470nm的轴向像差曲线,由该图14a可以看出,不同波长的光的轴向像差控制在一个很小的范围之内。
图14b所示的为采用图13所示镜头结构,并采用上述表4-1、表4-2和表4-3时的横向像差曲线。图14b中所示的五条曲线分别为设计波长为650nm、610nm、555nm、510nm和 470nm的横向像差曲线,虚线代表衍射极限范围,由该图14b可以看出,不同波长的光的横向像差在衍射范围内。
图14c所示的为采用图13所示镜头结构,并采用上述表4-1、表4-2和表4-3时的畸变像差曲线,图14d为理想畸变像差曲线。由图14c和图14d对比可以看出,不同波长的光的畸变像差在肉眼识别范围内。
图15所示的另一种镜头的结构图,透镜组G2具有三个透镜,三个透镜分别为沿第二光轴X2依次布设的第二透镜G21、第三透镜G22和第四透镜G23,第二透镜G21的物侧面与棱镜G12的像侧面相对,第四透镜G23为变焦液体透镜。另外,该镜头还包括平板玻璃G3,除此之外,该镜头还可以包括IR滤光片G4。
第三透镜G22的像侧面为凸面。将第三透镜G22的像侧面设计为凸面的话,可以会聚光线,进一步的提升像质。
第四透镜G23的像侧面为凸面,物侧面为凹面。
该镜头的光圈3.4<F/#<5。
下述表5-1为该镜头的光学参数。
光学参数 | |
系统焦距(F) | 27.997mm,24.007mm,32.998mm, |
光圈数(F/#) | 4.13,3.44,4.98 |
像高(IMH) | 2.5mm |
光学总长(TTL) | 32.54mm |
设计波长 | 650nm,610nm,555nm,510nm,470nm |
表5-1
下述表5-2为该镜头中的各个光学器件的光学参数。
表5-2
下述表5-3为变焦液体透镜的曲率半径和所对应的焦距。
表5-3
下述表5-4为上述表5-2中各镜片的非球面系数。其中,第二透镜G21的像侧面和物侧面分别为偶次非球面。
表5-4
同样的,在本实施例中,所有的偶次非球面的矢高Z可利用下述公式进行限定,但不限于以下公式。
其中:Z代表非球面的矢高;r为非球面的径向坐标,C为非球面顶点球曲率。
图16a所示的为采用图15所示镜头结构,并采用上述表5-1、表5-2和表5-3,以及表 5-4时的轴向像差曲线。图16a中所示的五条曲线分别为设计波长为650nm、610nm、555nm、510nm和470nm的轴向像差曲线,由该图16a可以看出,不同波长的光的轴向像差控制在一个很小的范围之内。
图16b所示的为采用图15所示镜头结构,并采用上述表5-1、表5-2和表5-3,以及表5-4时的横向像差曲线。图16b中所示的五条曲线分别为设计波长为650nm、610nm、555nm、510nm和470nm的横向像差曲线,虚线代表衍射极限范围,由该图16b可以看出,不同波长的光的横向像差在衍射范围内。
图16c所示的为采用图15所示镜头结构,并采用上述表5-1、表5-2和表5-3,以及表5-4时的畸变像差曲线,图16d为理想畸变像差曲线。由图16c和图16d对比可以看出,不同波长的光的畸变像差在肉眼识别范围内。
上述的图5、图9、图11、图13和图15所示的镜头中,透镜组G2包括三个透镜,这样的镜头结构可以被称为组合三片式透镜组。
图17所示的另一种镜头的结构图,透镜组G2具有四个透镜,三个透镜分别为沿第二光轴X2依次布设的第二透镜G21、第三透镜G22和第四透镜G23,以及第五透镜G24,第二透镜G21的物侧面与棱镜G12的像侧面相对。另外,该镜头还包括IR滤光片G3。第五透镜G24的像侧面为凸面。
下述表6-1为该镜头的光学参数。
光学参数 | |
系统焦距(F) | 28.40mm |
光圈数(F/#) | 3.81 |
像高(IMH) | 2.5mm |
光学总长(TTL) | 25.74mm |
设计波长 | 650nm,610nm,555nm,510nm,470nm |
表6-1
下述表6-2为该镜头中的各个光学器件的光学参数。
表6-2
下述表6-3为上述表6-2中各镜片的非球面系数。其中,第二透镜G21的像侧面和物侧面分别为偶次非球面。
表6-3
由上述表6-3可以看出,该实施例提供的镜头包括两个偶次非球面,在本实施例中,所有的偶次非球面的矢高Z可利用下述公式进行限定,但不限于以下公式。
其中:Z代表非球面的矢高;r为非球面的径向坐标,C为非球面顶点球曲率。
图18a所示的为采用图17所示镜头结构,并采用上述表6-1、表6-2和表6-3时的轴向像差曲线。图18a中所示的五条曲线分别为设计波长为650nm、610nm、555nm、510nm和470nm的轴向像差曲线,由该图18a可以看出,不同波长的光的轴向像差控制在一个很小的范围之内。
图18b所示的为采用图17所示镜头结构,并采用上述表6-1、表6-2和表6-3时的横向像差曲线。图18b中所示的五条曲线分别为设计波长为650nm、610nm、555nm、510nm和470nm的横向像差曲线,虚线代表衍射极限范围,由该图18b可以看出,不同波长的光的横向像差在衍射范围内。
图19所示的另一种镜头的结构图,透镜组G2具有四个透镜,三个透镜分别为沿第二光轴X2依次布设的第二透镜G21、第三透镜G22和第四透镜G23,以及第五透镜G24,第二透镜G21的物侧面与棱镜G12的像侧面相对。另外,该镜头还包括IR滤光片G3。第五透镜G24的物侧面为凸面。
下述表7-1为该镜头的光学参数。
光学参数 | |
系统焦距(F) | 28.4mm |
光圈数(F/#) | 3.81 |
像高(IMH) | 2.5mm |
光学总长(TTL) | 25.6mm |
设计波长 | 650nm,610nm,555nm,510nm,470nm |
表7-1
下述表7-2为该镜头中的各个光学器件的光学参数。
表7-2
下述表7-3为上述表7-2中各镜片的非球面系数。其中,第二透镜G21的像侧面和物侧面分别为偶次非球面。
表7-3
由上述表7-3可以看出,该实施例提供的镜头包括两个非球面,在本实施例中,所有的偶次非球面的矢高Z可利用下述公式进行限定,但不限于以下公式。
其中:Z代表非球面的矢高;r为非球面的径向坐标,C为非球面顶点球曲率。
图20a所示的为采用图19所示镜头结构,并采用上述表7-1、表7-2和表7-3时的轴向 像差曲线。图20a中所示的五条曲线分别为设计波长为650nm、610nm、555nm、510nm和470nm的轴向像差曲线,由该图20a可以看出,不同波长的光的轴向像差控制在一个很小的范围之内。
图20b所示的为采用图19所示镜头结构,并采用上述表7-1、表7-2和表7-3时的横向像差曲线。图20b中所示的五条曲线分别为设计波长为650nm、610nm、555nm、510nm和470nm的横向像差曲线,虚线代表衍射极限范围,由该图20b可以看出,不同波长的光的横向像差在衍射范围内。
图20c所示的为采用图19所示镜头结构,并采用上述表7-1、表7-2和表7-3时的畸变像差曲线,图20d为理想畸变像差曲线。由图20c和图20d对比可以看出,不同波长的光的畸变像差在肉眼识别范围内。
图21所示的另一种镜头的结构图,透镜组G2具有四个透镜,三个透镜分别为沿第二光轴X2依次布设的第二透镜G21、第三透镜G22和第四透镜G23,以及第五透镜G24,第二透镜G21的物侧面与棱镜G12的像侧面相对。另外,该镜头还包括IR滤光片G3。第五透镜G24的像侧面为凸面。
下述表8-1为该镜头的光学参数。
光学参数 | |
系统焦距(F) | 28.39mm |
光圈数(F/#) | 3.81 |
像高(IMH) | 2.5mm |
光学总长(TTL) | 24.4mm |
设计波长 | 650nm,610nm,555nm,510nm,470nm |
表8-1
下述表8-2为该镜头中的各个光学器件的光学参数。
表8-2
下述表8-3为上述表8-2中各镜片的非球面系数。其中,第二透镜G21的像侧面和物侧面分别为偶次非球面。
表8-3
由上述表8-3可以看出,该实施例提供的镜头包括两个非球面,在本实施例中,所有的偶次非球面的矢高Z可利用下述公式进行限定,但不限于以下公式。
其中:Z代表非球面的矢高;r为非球面的径向坐标,C为非球面顶点球曲率。
图22a所示的为采用图21所示镜头结构,并采用上述表8-1、表8-2和表8-3时的轴向像差曲线。图22a中所示的五条曲线分别为设计波长为850nm、810nm、555nm、510nm和 470nm的轴向像差曲线,由该图22a可以看出,不同波长的光的轴向像差控制在一个很小的范围之内。
图22b所示的为采用图21所示镜头结构,并采用上述表8-1、表8-2和表8-3时的横向像差曲线。图22b中所示的五条曲线分别为设计波长为850nm、810nm、555nm、510nm和470nm的横向像差曲线,虚线代表衍射极限范围,由该图22b可以看出,不同波长的光的横向像差在衍射范围内。
图22c所示的为采用图21所示镜头结构,并采用上述表8-1、表8-2和表8-3时的畸变像差曲线,图22d为理想畸变像差曲线。由图22c和图22d对比可以看出,不同波长的光的畸变像差在肉眼识别范围内。
图23所示的另一种镜头的结构图,透镜组G2具有四个透镜,三个透镜分别为沿第二光轴X2依次布设的第二透镜G21、第三透镜G22和第四透镜G23,以及第五透镜G24,第二透镜G21的物侧面与棱镜G12的像侧面相对。另外,该镜头还包括棱镜组G3和IR滤光片G4。第四透镜G23为DOE。
下述表9-1为该镜头的光学参数。
光学参数 | |
系统焦距(F) | 28.005mm |
光圈数(F/#) | 4.06 |
像高(IMH) | 2.5mm |
光学总长(TTL) | 28.9mm |
设计波长 | 650nm,610nm,555nm,510nm,470nm |
表9-1
下述表9-2为该镜头中的各个光学器件的光学参数。
表9-2
下述表9-3为上述表9-2中各镜片的非球面系数。其中,第二透镜G21的像侧面和物侧面分别为偶次非球面,第四透镜G23的物侧面为二元衍射面(Binary 2)。
表9-3
下述表9-4为上述表9-3中第四透镜G23的衍射面系数。
表9-4
由上述表9-3可以看出,该实施例提供的镜头包括三个非球面,在本实施例中,所有的偶次非球面的矢高Z也可利用下述公式进行限定,但不限于以下公式。
其中:Z代表非球面的矢高;r为非球面的径向坐标,C为非球面顶点球曲率。
在本实施例中,二元衍射面的矢高Z2可用下述公式进行限定:
其中,M代表衍射级次;p为相位分布幂,A为相位分布系数,C为非球面顶点球曲率,r为非球面的径向坐标。
图24a所示的为采用图23所示镜头结构,并采用上述表9-1、表9-2、表9-3和表9-4所示数据时的轴向像差曲线。图24a中所示的五条曲线分别为设计波长为650nm、624nm、555nm、524nm和470nm的轴向像差曲线,由该图24a可以看出,不同波长的光的轴向像差控制在一个很小的范围之内。
图24b所示的为采用图23所示镜头结构,并采用上述表9-1、表9-2、表9-3和表9-4所示数据时的横向像差曲线。图24b中所示的五条曲线分别为设计波长为650nm、624nm、555nm、524nm和470nm的横向像差曲线,虚线代表衍射极限范围,由该图24b可以看出,不同波长的光的横向像差在衍射范围内。
图24c所示的为采用图23所示镜头结构,并采用上述表9-1、表9-2、表9-3和表9-4所示数据时的畸变像差曲线,图24d为理想畸变像差曲线。由图24c和图24d对比可以看出,不同波长的光的畸变像差在肉眼识别范围内。
图25所示的另一种镜头的结构图,透镜组G2具有四个透镜,三个透镜分别为沿第二光轴X2依次布设的第二透镜G21、第三透镜G22和第四透镜G23,以及第五透镜G24,第二透镜G21的物侧面与棱镜G12的像侧面相对。另外,该镜头还包括平板玻璃G3和IR滤光片G4。第四透镜G23为DOE。第五透镜G24为变焦液体透镜。第五透镜G24的像侧面为凸面。
该镜头的光圈3.35<F/#<3.7。
下述表10-1为该镜头的光学参数。
光学参数 | |
系统焦距(F) | 24.8mm<F<27.4mm |
光圈数(F/#) | 3.35<F/#<3.74 |
像高(IMH) | 2.5mm |
光学总长(TTL) | 26mm<TTL<27mm |
设计波长 | 650nm,610nm,555nm,510nm,470nm |
表10-1
下述表10-2为该镜头中的各个光学器件的光学参数。
表10-2
下述表10-3为上述表10-2中各镜片的非球面系数。其中,第二透镜G21的像侧面和物 侧面分别为偶次非球面。
表10-3
同样的,在本实施例中,所有的偶次非球面的矢高Z可利用下述公式进行限定,但不限于以下公式。
其中:Z代表非球面的矢高;r为非球面的径向坐标,C为非球面顶点球曲率。
图26a所示的为采用图25所示镜头结构,并采用上述表10-1、表10-2和表10-3,以及表10-4时的轴向像差曲线。图26a中所示的五条曲线分别为设计波长为650nm、610nm、555nm、510nm和470nm的轴向像差曲线,由该图26a可以看出,不同波长的光的轴向像差控制在一个很小的范围之内。
图26b所示的为采用图25所示镜头结构,并采用上述表10-1、表10-2和表10-3,以及表10-4时的横向像差曲线。图26b中所示的五条曲线分别为设计波长为650nm、610nm、555nm、510nm和470nm的横向像差曲线,虚线代表衍射极限范围,由该图26b可以看出,不同波长的光的横向像差在衍射范围内。
图26c所示的为采用图25所示镜头结构,并采用上述表10-1、表10-2和表10-3,以及表10-4时的畸变像差曲线,图26d为理想畸变像差曲线。由图26c和图26d对比可以看出,不同波长的光的畸变像差在肉眼识别范围内。
上述的图17、图19、图21、图23和图25所示的镜头中,透镜组G2包括四个透镜,这样的镜头结构可以被称为组合四片式透镜组。
图27所示的另一种镜头的结构图,透镜组G2具有五个透镜,五个透镜分别为沿第二光轴X2依次布设的第二透镜G21、第三透镜G22和第四透镜G23,以及第五透镜G24,以及第六透镜G25,第二透镜G21的物侧面与棱镜G12的像侧面相对。另外,该镜头还包括IR滤光片G3。第五透镜G24的像侧面为凸面,第六透镜G25的像侧面为凸面。
下述表11-1为该镜头的光学参数。
光学参数 | |
系统焦距(F) | 14.37mm |
光圈数(F/#) | 3.34 |
像高(IMH) | 2.25mm |
光学总长(TTL) | 14.9mm |
设计波长 | 650nm,610nm,555nm,510nm,470nm |
表11-1
下述表11-2为该镜头中的各个光学器件的光学参数。
表11-2
下述表11-3为上述表11-2中各镜片的非球面系数。
表11-3
镜头一共包含10个扩展非球面(Extended Asphere,EA)。
在本实施例中,所有的扩展非球面的矢高Z也可利用下述公式进行限定,但不限于以下公式。
其中:Z代表非球面的矢高;r为非球面的径向坐标,C为非球面顶点球曲率,a
1、a
2、a
3等为非球面系数。
图28a所示的为采用图27所示镜头结构,并采用上述表11-1、表11-2和表11-3所示数据时的轴向像差曲线。图28a中所示的五条曲线分别为设计波长为650nm、610nm、555nm、510nm和470nm的轴向像差曲线,由该图28a可以看出,不同波长的光的轴向像差控制在一个很小的范围之内。
图28b所示的为采用图27所示镜头结构,并采用上述表11-1、表11-2和表11-3所示数据时的横向像差曲线。图28b中所示的五条曲线分别为设计波长为650nm、610nm、555nm、510nm和470nm的横向像差曲线,虚线代表衍射极限范围,由该图28b可以看出,不同波长的光的横向像差在衍射范围内。
图28c所示的为采用图27所示镜头结构,并采用上述表11-1、表11-2和表11-3所示数据时的畸变像差曲线,图28d为理想畸变像差曲线。由图28c和图28d对比可以看出,不同波长的光的畸变像差在肉眼识别范围内。
图29所示的另一种镜头的结构图,透镜组G2具有五个透镜,五个透镜分别为沿第二光轴X2依次布设的第二透镜G21、第三透镜G22和第四透镜G23,以及第五透镜G24,以及第 六透镜G25,第二透镜G21的物侧面与棱镜G12的像侧面相对。另外,该镜头还包括IR滤光片G3。第五透镜G24的像侧面为凸面。
下述表12-1为该镜头的光学参数。
光学参数 | |
系统焦距(F) | 14.44mm |
光圈数(F/#) | 3.38 |
像高(IMH) | 2.25mm |
光学总长(TTL) | 15.9mm |
设计波长 | 650nm,610nm,555nm,510nm,470nm |
表12-1
下述表12-2为该镜头中的各个光学器件的光学参数。
表12-2
下述表12-3为上述表12-2中各镜片的非球面系数。
表12-3
镜头一共包含10个扩展非球面。
在本实施例中,所有的扩展非球面的矢高Z也可利用下述公式进行限定,但不限于以下公式。
其中:Z代表非球面的矢高;r为非球面的径向坐标,C为非球面顶点球曲率,a
1、a
2、a
3等为非球面系数。
图30a所示的为采用图29所示镜头结构,并采用上述表12-1、表12-2和表12-3所示数据时的轴向像差曲线。图30a中所示的五条曲线分别为设计波长为650nm、610nm、555nm、 510nm和470nm的轴向像差曲线,由该图30a可以看出,不同波长的光的轴向像差控制在一个很小的范围之内。
图30b所示的为采用图29所示镜头结构,并采用上述表12-1、表12-2和表12-3所示数据时的横向像差曲线。图30b中所示的五条曲线分别为设计波长为650nm、610nm、555nm、510nm和470nm的横向像差曲线,虚线代表衍射极限范围,由该图30b可以看出,不同波长的光的横向像差在衍射范围内。
图30c所示的为采用图29所示镜头结构,并采用上述表12-1、表12-2和表12-3所示数据时的畸变像差曲线,图30d为理想畸变像差曲线。由图30c和图30d对比可以看出,不同波长的光的畸变像差在肉眼识别范围内。
图31所示的另一种镜头的结构图,透镜组G2具有五个透镜,五个透镜分别为沿第二光轴X2依次布设的第二透镜G21、第三透镜G22和第四透镜G23,以及第五透镜G24,以及第六透镜G25,第二透镜G21的物侧面与棱镜G12的像侧面相对。另外,该镜头还包括IR滤光片G3,除此之外,还包括变焦液体透镜G0,变焦液体透镜G0设置在第一透镜G11的像侧面的一侧。第六透镜G25的像侧面为凸面。
下述表13-1为该镜头的光学参数。
光学参数 | |
系统焦距(F) | 12.14mm<F<16.18mm |
光圈数(F/#) | 3.40 |
像高(IMH) | 2.25mm |
光学总长(TTL) | 13mm<TTL<16.4mm |
设计波长 | 650nm,610nm,555nm,510nm,470nm |
表13-1
下述表13-2为该镜头中的各个光学器件的光学参数。
表13-2
下述表11-3为上述表11-2中各镜片的非球面系数。
表13-3
镜头一共包含10个扩展非球面。
在本实施例中,所有的扩展非球面的矢高Z也可利用下述公式进行限定,但不限于以下公式。
其中:Z代表非球面的矢高;r为非球面的径向坐标,C为非球面顶点球曲率,a
1、a
2、a
3等为非球面系数。
图32a所示的为采用图31所示镜头结构,并采用上述表13-1、表13-2和表13-3所示数据时的轴向像差曲线。图32a中所示的五条曲线分别为设计波长为650nm、610nm、555nm、510nm和470nm的轴向像差曲线,由该图32a可以看出,不同波长的光的轴向像差控制在一个很小的范围之内。
图32b所示的为采用图31所示镜头结构,并采用上述表13-1、表13-2和表13-3所示数据时的横向像差曲线。图32b中所示的五条曲线分别为设计波长为650nm、610nm、555nm、510nm和470nm的横向像差曲线,虚线代表衍射极限范围,由该图32b可以看出,不同波长的光的横向像差在衍射范围内。
图32c所示的为采用图31所示镜头结构,并采用上述表13-1、表13-2和表13-3所示数据时的畸变像差曲线,图32d为理想畸变像差曲线。由图32c和图32d对比可以看出,不同波长的光的畸变像差在肉眼识别范围内。
图33所示的另一种镜头的结构图,透镜组G2具有五个透镜,五个透镜分别为沿第二光轴X2依次布设的第二透镜G21、第三透镜G22和第四透镜G23,以及第五透镜G24,以及第六透镜G25,第二透镜G21的物侧面与棱镜G12的像侧面相对。另外,该镜头还包括IR滤光片G3。第六透镜G25的像侧面为凸面。
下述表14-1为该镜头的光学参数。
光学参数 | |
系统焦距(F) | 28.39mm |
光圈数(F/#) | 3.81 |
像高(IMH) | 2.5mm |
光学总长(TTL) | 27.45mm |
设计波长 | 650nm,610nm,555nm,510nm,470nm |
表14-1
下述表14-2为该镜头中的各个光学器件的光学参数。
表14-2
下述表14-3为上述表14-2中各镜片的非球面系数。其中,第二透镜G21的像侧面和物侧面分别为偶次非球面。
表14-3
下述表14-4为第四透镜G23的衍射面系数。
表14-4
由上述表14-3可以看出,该实施例提供的镜头包括两个非球面,在本实施例中,所有的偶次非球面的矢高Z也可利用下述公式进行限定,但不限于以下公式。
其中:Z代表非球面的矢高;r为非球面的径向坐标,C为非球面顶点球曲率。
在本实施例中,二元衍射面的矢高Z2可用下述公式进行限定:
其中,M代表衍射级次;p为相位分布幂,A为相位分布系数,C为非球面顶点球曲率,r为非球面的径向坐标。
图34a所示的为采用图33所示镜头结构,并采用上述表14-1、表14-2、表14-3和表14-4所示数据时的轴向像差曲线。图34a中所示的五条曲线分别为设计波长为650nm、634nm、555nm、534nm和470nm的轴向像差曲线,由该图34a可以看出,不同波长的光的轴向像差控制在一个很小的范围之内。
图34b所示的为采用图33所示镜头结构,并采用上述表14-1、表14-2、表14-3和表14-4所示数据时的横向像差曲线。图34b中所示的五条曲线分别为设计波长为650nm、634nm、555nm、534nm和470nm的横向像差曲线,虚线代表衍射极限范围,由该图34b可以看出,不同波长的光的横向像差在衍射范围内。
图34c所示的为采用图33所示镜头结构,并采用上述表14-1、表14-2、表14-3和表14-4所示数据时的畸变像差曲线,图34d为理想畸变像差曲线。由图34c和图34d对比可以看出,不同波长的光的畸变像差在肉眼识别范围内。
在本说明书的描述中,具体特征、结构、材料或者特点可以在任何的一个或多个实施例 或示例中以合适的方式结合。
以上,仅为本申请的具体实施方式,但本申请的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本申请的保护范围之内。因此,本申请的保护范围应以权利要求的保护范围为准。
Claims (17)
- 一种镜头,其特征在于,沿物场至像场方向,所述镜头包括:第一透镜,具有正光焦度,所述第一透镜的物侧面为凸面;棱镜,所述棱镜的物侧面与所述第一透镜的像侧面相接触,所述棱镜将从所述第一透镜接收的光由第一光轴折射在与所述第一光轴相交的第二光轴;多个透镜,所述多个透镜包括至少三个透镜,所述多个透镜沿所述第二光轴依次布设;其中,所述多个透镜中的靠近所述棱镜的透镜的物侧面和像侧面均为非球面,所述多个透镜中的靠近所述镜头的像场的透镜的像侧面为凸面。
- 根据权利要求1所述的镜头,其特征在于,所述多个透镜包括:具有负光焦度的第二透镜;具有正光焦度的第三透镜;具有光焦度的第四透镜;所述第二透镜、所述第三透镜和所述第四透镜沿所述第二光轴依次布设。
- 根据权利要求1项所述的镜头,其特征在于,所述多个透镜包括:具有光焦度的第二透镜;具有光焦度的第三透镜;具有光焦度的第四透镜;具有光焦度的第五透镜;所述第二透镜、所述第三透镜和所述第四透镜,以及所述第五透镜沿所述第二光轴依次布设。
- 根据权利要求1所述的镜头,其特征在于,所述多个透镜包括:具有正光焦度的第二透镜;具有负光焦度的第三透镜;具有负光焦度的第四透镜;具有正光焦度的第五透镜;具有负光焦度的第六透镜;所述第二透镜、所述第三透镜、所述第四透镜和所述第五透镜,以及所述第六透镜沿所述第二光轴依次布设。
- 根据权利要求1~7中任一项所述的镜头,其特征在于,所述多个透镜中的至少一个透镜为衍射光学元件。
- 根据权利要求1~8中任一项所述的镜头,其特征在于,所述多个透镜中的至少一个透镜为第一变焦液体透镜。
- 根据权利要求1~9中任一项所述的镜头,其特征在于,所述镜头还包括:第二变焦液体透镜,所述第二变焦液体透镜设置在所述第一透镜的靠近所述物场的一侧。
- 根据权利要求1~10中任一项所述的镜头,其特征在于,所述镜头的总焦距f为:14mm≤f≤33mm。
- 根据权利要求1~13中任一项所述的镜头,其特征在于,所述棱镜由玻璃材料制得,所述第一透镜由塑料材料制得,所述第一透镜通过粘结层粘结在所述棱镜上。
- 根据权利要求1~13中任一项所述的镜头,其特征在于,所述棱镜和所述第一透镜均由塑料材料制得,且所述棱镜和所述第一透镜呈一体结构。
- 一种摄像头模组,其特征在于,包括:如权利要求1-15任一项所述的镜头;图像传感器,所述图像传感器的感光面与所述镜头中的成像面相对。
- 一种电子设备,其特征在于,包括:如权利要求16所述的摄像头模组;处理单元,与所述摄像头模组中的所述图像传感器连接。
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