CN110531485A - Imaging optical system and electronic device - Google Patents
Imaging optical system and electronic device Download PDFInfo
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- CN110531485A CN110531485A CN201810513158.7A CN201810513158A CN110531485A CN 110531485 A CN110531485 A CN 110531485A CN 201810513158 A CN201810513158 A CN 201810513158A CN 110531485 A CN110531485 A CN 110531485A
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- imaging optical
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- object side
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
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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
Abstract
The invention discloses a kind of imaging optical system and electronic devices.Imaging optical system includes multiple lens, and multiple lens successively include first lens with positive refracting power, the second lens with negative refracting power, the third lens with refracting power, the 4th lens with refracting power and the 5th lens with refracting power by object side to image side.The object side of first lens is convex surface, and the image side surface of the first lens is concave surface at optical axis, is convex surface at circumference, and the image side surface of the second lens is concave surface, and the image side surface of the 5th lens is convex surface at circumference.A plane is included at least in the surface of multiple lens, imaging optical system further includes the infrared cut coating of setting in the plane.In imaging optical system and electronic device of the invention, reduce the use of infrared fileter, shortens the mould group height of entire imaging optical system, and save the cost.In addition, reducing the susceptibility of imaging optical system, the yield of imaging optical system is improved.
Description
Technical field
The present invention relates to optical image technologies, more specifically, are related to a kind of imaging optical system and electronic device.
Background technique
Currently, imaging optical system generally comprises more pieces of lens, and need additional setting infrared fileter.Infrared filtering
Piece is used to adjust the wavelength of light section of imaging, enters photosensitive element specifically for isolation infrared light, to prevent infrared light pair
Normal images color is impacted with clarity.However, the infrared fileter being additionally arranged will increase entire imaging optical system
Mould group height, and higher cost.
Summary of the invention
Embodiment of the present invention provides a kind of imaging optical system and electronic device.
The imaging optical system of embodiment of the present invention includes multiple lens, the multiple lens by object side to image side successively
Including the first lens with positive refracting power, the second lens with negative refracting power, the third lens with refracting power, has and bend
Roll over the 4th lens of power and the 5th lens with refracting power.The object side of first lens is convex surface, first lens
Image side surface be concave surface at optical axis, be convex surface at circumference, the image side surfaces of second lens is concave surface, the 5th lens
Image side surface at circumference be convex surface.A plane, the imaging optical system are included at least in the surface of the multiple lens
It further include the infrared cut coating of setting on the plane.
Plane is contained at least one in multiple lens of the imaging optical system of embodiment of the present invention, and is set in the plane
It is equipped with infrared cut coating, to reduce the use of infrared fileter, shortens the mould group height of entire imaging optical system, and save
Cost.In addition, reducing the susceptibility of imaging optical system by the use of plane, the good of imaging optical system is improved
Rate.
In some embodiments, the multiple lens further include the 6th lens with negative refracting power, and the described 6th thoroughly
The image side of the 5th lens is arranged in mirror.Imaging optical system can be made of six lens, in the surface of six lens extremely
It less include a plane.In this way, to further increase image quality.
In some embodiments, aspherical including at least one in the surface of the multiple lens.In this way, image optics
System can effectively reduce the total length of imaging optical system by the radius of curvature and asphericity coefficient of adjusting lens surface,
And the use of diversification face type can effectively correct system aberration, improve image quality.
In some embodiments, the imaging optical system meets following relationship:
10<TTL*f/tan(HFOV)<18；Wherein, TTL be first lens object side to imaging sensor axis
Upper spacing, f are the focal length of the imaging optical system, and HFOV is the field angle of the diagonal along described image sensor
Half.
So, on the one hand, can be realized the miniaturization of imaging optical system, to be equipped on the electronic product of light and portable formula
On；On the other hand, imaging optical system can be made to meet the needs of high pixel, solve imaging optical system low back, big view
The partially dark problem of picture is shot in rink corner, to expand the time and environment workable for imaging optical system.
In some embodiments, the imaging optical system meets following relationship:
1<F12/f<2；Wherein, f is the focal length of the imaging optical system, and F12 is first lens and described second
The combined focal length of lens.Meet above-mentioned relation formula, so that the first lens and the second lens have proper focal power, to match
The configuration of synthesized image optical system overall focal power, and be conducive to aberration correction, improve the image quality of imaging optical system.
In some embodiments, the imaging optical system meets following relationship:
-6<F24/f<1；Wherein, f is the focal length of the imaging optical system, and F24 is second lens and the described 4th
The combined focal length of lens.Meet above-mentioned relation formula, so that the second lens and the 4th lens have proper focal power, to match
The configuration of synthesized image optical system overall focal power, and be conducive to aberration correction, improve the image quality of imaging optical system.
In some embodiments, the imaging optical system meets following relationship:
∣V3-V2∣<38；Wherein, V3 is the abbe number of the third lens, and V2 is the dispersion system of second lens
Number.In this way, can more suitably correcting chromatic aberration to improve image quality.
In some embodiments, the imaging optical system meets following relationship:
-10<fs/f<30；Wherein, f is the focal length of the imaging optical system, and it includes that fs, which is in the multiple lens,
State the focal length of the lens of plane.In this way, making the lens containing plane that there is proper focal power, to cooperate image optics
The configuration of system entirety focal power, is conducive to the miniaturization of imaging optical system and the aberration of correction imaging optical system.
In some embodiments, infrared cut coating is coated in the plane.The object side of second lens is plane,
The imaging optical system includes the infrared cut coating that the object side of second lens is arranged in.In this way, reducing infrared filtering
The use of piece, shortens the mould group height of entire imaging optical system, and has saved cost.
In some embodiments, the object side of the third lens is plane, and the imaging optical system includes setting
Infrared cut coating in the object side of the third lens.In this way, reducing the use of infrared fileter, entire imaging is shortened
The mould group height of system, and saved cost.
In some embodiments, the image side surface of the third lens is plane, and the imaging optical system includes setting
In the infrared cut coating of the image side surface of the third lens.In this way, reducing the use of infrared fileter, entire imaging is shortened
The mould group height of system, and saved cost.
In some embodiments, the image side surface of the 4th lens is plane, and the imaging optical system includes setting
In the infrared cut coating of the image side surface of the 4th lens.In this way, reducing the use of infrared fileter, entire imaging is shortened
The mould group height of system, and saved cost.
The electronic device of embodiment of the present invention includes imaging described in imaging sensor and any of the above-described embodiment
The image side of the imaging optical system is arranged in system, described image sensor.
In the electronic device of embodiment of the present invention, plane is contained at least one in multiple lens of imaging optical system,
And it is provided with infrared cut coating in the plane, to reduce the use of infrared fileter, shorten the mould of entire imaging optical system
Group height, and saved cost.In addition, reducing the susceptibility of imaging optical system by the use of plane, imaging is improved
The yield of optical system.
The additional aspect and advantage of embodiments of the present invention will be set forth in part in the description, partially will be from following
Description in become obvious, or the practice of embodiment through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention is from combining in description of the following accompanying drawings to embodiment by change
It obtains obviously and is readily appreciated that, in which:
Fig. 1 is the structural schematic diagram of the imaging optical system of the embodiment of the present invention one；
Fig. 2 is the longitudinal aberration diagram (mm) of the imaging optical system of the embodiment of the present invention one；
Fig. 3 is the curvature of field figure (mm) of the imaging optical system of the embodiment of the present invention one；
Fig. 4 is the distortion figure (%) of the imaging optical system of the embodiment of the present invention one；
Fig. 5 is the structural schematic diagram of the imaging optical system of the embodiment of the present invention two；
Fig. 6 is the longitudinal aberration diagram (mm) of the imaging optical system of the embodiment of the present invention two；
Fig. 7 is the curvature of field figure (mm) of the imaging optical system of the embodiment of the present invention two；
Fig. 8 is the distortion figure (%) of the imaging optical system of the embodiment of the present invention two；
Fig. 9 is the structural schematic diagram of the imaging optical system of the embodiment of the present invention three；
Figure 10 is the longitudinal aberration diagram (mm) of the imaging optical system of the embodiment of the present invention three；
Figure 11 is the curvature of field figure (mm) of the imaging optical system of the embodiment of the present invention three；
Figure 12 is the distortion figure (%) of the imaging optical system of the embodiment of the present invention three；
Figure 13 is the structural schematic diagram of the imaging optical system of the embodiment of the present invention four；
Figure 14 is the longitudinal aberration diagram (mm) of the imaging optical system of the embodiment of the present invention four；
Figure 15 is the curvature of field figure (mm) of the imaging optical system of the embodiment of the present invention four；
Figure 16 is the distortion figure (%) of the imaging optical system of the embodiment of the present invention four；
Figure 17 is the structural schematic diagram of the electronic device of embodiment of the present invention；
Figure 18 is the structural schematic diagram of the camera mould group of the electronic device of embodiment of the present invention.
Specific embodiment
Embodiments of the present invention are described further below in conjunction with attached drawing.Same or similar label is from beginning in attached drawing
To the same or similar element of expression or element with the same or similar functions eventually.
In addition, the embodiments of the present invention described with reference to the accompanying drawing are exemplary, for explaining only the invention
Embodiment, and be not considered as limiting the invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
Following disclosure provides many different embodiments or example is used to realize different structure of the invention.In order to
Simplify disclosure of the invention, hereinafter the component of specific examples and setting are described.Certainly, they are merely examples, and
And it is not intended to limit the present invention.In addition, the present invention can in different examples repeat reference numerals and/or reference letter,
This repetition is for purposes of simplicity and clarity, itself not indicate between discussed various embodiments and/or setting
Relationship.In addition, the present invention provides various specific techniques and material example, but those of ordinary skill in the art can be with
Recognize the application of other techniques and/or the use of other materials.
Referring to Fig. 1, the imaging optical system 10 of embodiment of the present invention includes multiple lens.Multiple lens by object side extremely
Image side successively includes the first lens L1 with positive refracting power, the second lens L2 with negative refracting power, with refracting power
Three lens L3, the 4th lens L4 with refracting power and the 5th lens L5 with refracting power.First lens L1 has object side
There is object side S3 and image side surface S4, the third lens L3 to have object side S5 and image side surface by S1 and image side surface S2, the second lens L2
There is object side S7 and image side surface S8, the 5th lens L5 to have object side S9 and image side surface S10 by S6, the 4th lens L4.First thoroughly
The object side S1 of mirror L1 is convex surface, and the image side surface S2 of the first lens L1 is concave surface at optical axis, (i.e. far from optical axis at circumference
Place) it is convex surface, the image side surface S4 of the second lens L2 is concave surface, and the image side surface S10 of the 5th lens L5 is convex surface at circumference.It is multiple
A plane is included at least in the surface of lens, imaging optical system 10 further includes the infrared cut coating 11 of setting in the plane.
Plane is contained at least one in multiple lens of the imaging optical system 10 of embodiment of the present invention, and in the plane
It is provided with infrared cut coating 11, to reduce the use of infrared fileter, shortens the mould group height of entire imaging optical system 10,
And cost is saved.In addition, reducing the susceptibility of imaging optical system 10 by the use of plane, improving image optics
The yield of system 10.
Fig. 1 and Fig. 5 is please referred to, in some embodiments, multiple lens further include the 6th lens with negative refracting power
The image side of the 5th lens L5 is arranged in L6, the 6th lens L6.6th lens L6 has object side S11 and image side surface S12.Imaging
System 10 can be made of six lens, and a plane is included at least in the surface of six lens.In this way, to further increase
Image quality.
Specifically, such as Fig. 9 and Figure 13, when multiple lens successively include the first lens L1, the second lens by object side to image side
When L2, the third lens L3, the 4th lens L4 and the 5th lens L5, object side S1, image side surface S2, object side S3, image side surface S4, object
A plane is included at least in side S5, image side surface S6, object side S7, image side surface S8, object side S9 and image side surface S10.For example,
The quantity of plane can be one, two, three or more, here with no restriction.
Such as Fig. 1 and Fig. 5, when multiple lens successively include that the first lens L1, the second lens L2, third are saturating by object side to image side
When mirror L3, the 4th lens L4, the 5th lens L5 and the 6th lens L6, object side S1, image side surface S2, object side S3, image side surface S4,
In object side S5, image side surface S6, object side S7, image side surface S8, object side S9, image side surface S10, object side S11 and image side surface S12
Including at least a plane.For example, the quantity of plane can be one, two, three or more, here with no restriction.
Infrared cut coating 11 is arranged in the plane by way of plated film.Infrared cut coating 11 is used to adjust the light of imaging
Wavelength section enters imaging sensor 20 (such as Figure 18) specifically for isolation infrared light, to prevent infrared light to normal images
Color is impacted with clarity.
In some embodiments, imaging optical system 10 further includes diaphragm STO, and diaphragm STO can be set any one
On the image side surface of piece lens or object side, or it is arranged before the first lens L1, or is arranged between any two pieces of lens.Example
Such as, in the embodiment of Fig. 1, Fig. 5 and Fig. 9, diaphragm STO is arranged on the object side S1 of the first lens L1.In the implementation of Figure 13
In example, diaphragm STO is arranged on the object side S1 of the first lens L1, specifically, the object on the surface of diaphragm STO and the first lens L1
Side S1 is overlapped.Imaging optical system 10 can adjust coke ratio (i.e. f-number) by diaphragm STO.
In some embodiments, the first lens L1, the second lens L2, the third lens L3, the 4th lens L4, the 5th lens
L5 and the 6th lens L6 are made of plastics.In this way, cost can be reduced.
In some embodiments, aspherical including at least one in the surface of multiple lens.In this way, imaging optical system
10 can effectively reduce the total length of imaging optical system 10 by the radius of curvature and asphericity coefficient of adjusting lens surface,
And the use of diversification face type can effectively correct system aberration, improve image quality.
Specifically, aspherical face type is determined by following formula:
Wherein, Z is the fore-and-aft distance of aspherical any point and surface vertices, and r is aspherical any point to optical axis
Distance, c are vertex curvature (inverses of radius of curvature), and k is the constant of the cone, and it is aspherical system that A, B, C, D, E, F, G, H, I ..., which are waited,
Number.
In some embodiments, imaging optical system 10 meets following relationship:
10<TTL*f/tan(HFOV)<18；Wherein, TTL is the object side S1 of the first lens L1 to imaging sensor 20
Spacing on axis, f are the focal length of imaging optical system 10, and HFOV is the one of the field angle of the diagonal along imaging sensor 20
Half.In other words, TTL*f/tan (HFOV) can in (10,18) range any value.For example, TTL*f/tan (HFOV) can
With value for 10.02,10.14,11.14,12,12.54,13.22,13.95,14.15,15.44,16.85,17.43,17.82.
So, on the one hand, can be realized the miniaturization of imaging optical system 10, to be equipped on the electronic product of light and portable formula；Separately
On the one hand, imaging optical system 10 can be made to meet the needs of high pixel, solve 10 low back of imaging optical system, big visual field
The partially dark problem of picture is shot in angle, to expand time workable for imaging optical system 10 and environment.
In some embodiments, imaging optical system 10 meets following relationship:
1<F12/f<2；Wherein, f is the focal length of imaging optical system 10, and F12 is the first lens L1's and the second lens L2
Combined focal length.In other words, F12/f can in (1,2) range any value.For example, F12/f can with value be 1.05,
1.09,1.18,1.19,1.2,1.22,1.31,1.54,1.62,1.77,1.85,1.93.Meet above-mentioned relation formula, so that first
Lens L1 and the second lens L2 has proper focal power, to cooperate the configuration of the whole focal power of imaging optical system 10,
And is conducive to aberration correction, improves the image quality of imaging optical system 10.
In some embodiments, imaging optical system 10 meets following relationship:
-6<F24/f<1；Wherein, f is the focal length of imaging optical system 10, and F24 is the second lens L2's and the 4th lens L4
Combined focal length.In other words, F24/f can in (- 6,1) range any value.For example, F24/f can with value be -5.02, -
5.17,-3.48,-2.12,-1.73,0.28,0.49,0.53,0.65,0.77.Meet above-mentioned relation formula, so that the second lens L2
There is proper focal power with the 4th lens L4, to cooperate the configuration of the whole focal power of imaging optical system 10, and have
Conducive to aberration correction, the image quality of imaging optical system 10 is improved.
In some embodiments, imaging optical system 10 meets following relationship:
∣V3-V2∣<38；Wherein, V3 is the abbe number of the third lens, and V2 is the abbe number of the second lens.It that is to say
Shuo , ∣ V3-V2 ∣ can [0,38) any value in range.For example, | V3-V2 | can with value be 0.33,1.15,5.89,
8.64,11.63,16.52,21.11,25.67,31.99,34.41,35.56,36.46 other numerical value.In this way, can be more suitable
Local correcting chromatic aberration is to improve image quality.
In some embodiments, imaging optical system 10 meets following relationship:
-10<fs/f<30；Wherein, f is the focal length of imaging optical system 10, and it includes the saturating of plane that fs, which is in multiple lens,
The focal length of mirror.In other words, fs/f can in (- 10,30) range any value.For example, fs/f can with value be -9.65, -
8.24,-7.43,-2.26,0,5.63,8.5,10.15,13.98,20.78,26.17,28.26.For example, in example 1,
The image side surface S8 of 4th lens L4 is plane, then fs is the focal length f4 of the 4th lens L4, then, f4/f can be in (- 10,30) model
Enclose interior any value.In example 2, the object side S5 of the third lens L3 is plane, then fs is the focal length of the third lens L3
F3, then, f3/f can in (- 10,30) range any value.In the third embodiment, the object side S3 of the second lens L2 is
Plane, then fs be the second lens L2 focal length f2, then, f2/f can in (- 10,30) range any value.In embodiment
In four, the image side surface S6 of the third lens L3 is plane, then fs is the focal length f3 of the third lens L3, then, f3/f can (- 10,
30) any value in range.In this way, making the lens containing plane that there is proper focal power, to cooperate image optics
The configuration of the whole focal power of system 10, is conducive to the miniaturization of imaging optical system 10 and the picture of correction imaging optical system 10
Difference.
The present invention is further detailed below by embodiment one to example IV.
Embodiment one:
Referring to FIG. 1 to FIG. 4, in embodiment one, imaging optical system 10 successively includes six lens from object side to image side,
That is the first lens L1, the second lens L2, the third lens L3, the 4th lens L4, the 5th lens L5 and the 6th lens L6.First lens
L1 has positive refracting power, and the second lens L2 has negative refracting power, and the third lens L3 has positive refracting power, and the 4th lens L4 has just
Refracting power, the 5th lens L5 have positive refracting power, and the 6th lens L6 has negative refracting power.Diaphragm STO is arranged in the first lens L1
Object side S1 on.
At optical axis, the object side S1 of the first lens L1 is convex surface, and image side surface S2 is concave surface, the object side of the second lens L2
S3 is convex surface, and image side surface S4 is concave surface, and the object side S5 of the third lens L3 is concave surface, and image side surface S6 is convex surface, the 4th lens L4
Object side S7 be convex surface, image side surface S8 is plane, and the object side S9 of the 5th lens L5 is convex surface, and image side surface S10 is convex surface, the
The object side S11 of six lens L6 is convex surface, and image side surface S12 is concave surface.
At circumference, the object side S1 of the first lens L1 is convex surface, and image side surface S2 is convex surface, the object side of the second lens L2
S3 is convex surface, and image side surface S4 is concave surface, and the object side S5 of the third lens L3 is concave surface, and image side surface S6 is convex surface, the 4th lens L4
Object side S7 be concave surface, image side surface S8 is plane, and the object side S9 of the 5th lens L5 is concave surface, and image side surface S10 is convex surface, the
The object side S11 of six lens L6 is convex surface, and image side surface S12 is convex surface.
In example 1, the effective focal length f of imaging optical system 10 is 3.53, and coke ratio fno is 2.06, the one of field angle
Half HFOV is 39.3 °.In other words, the field angle of embodiment one can achieve 78.6 °.In addition, the image side surface of the 4th lens L4
S8 is plane, and imaging optical system 10 includes the infrared cut coating 11 that the image side surface S8 of the 4th lens L4 is arranged in.In this way, can be with
The use for reducing infrared fileter, shortens the mould group height of entire imaging optical system 10, and saved cost.Specific ginseng
Number is as shown in Table 1 and Table 2.
Table 1
Table 2
Embodiment two:
Please referring to Fig. 5 to Fig. 8, in embodiment two, imaging optical system 10 successively includes six lens from object side to image side,
That is the first lens L1, the second lens L2, the third lens L3, the 4th lens L4, the 5th lens L5 and the 6th lens L6.First lens
L1 has positive refracting power, and the second lens L2 has negative refracting power, and the third lens L3 has positive refracting power, and the 4th lens L4 has negative
Refracting power, the 5th lens L5 have positive refracting power, and the 6th lens L6 has negative refracting power.Diaphragm STO is arranged in the first lens L1
Object side S1 on.
At optical axis, the object side S1 of the first lens L1 is convex surface, and image side surface S2 is concave surface, the object side of the second lens L2
S3 is concave surface, and image side surface S4 is concave surface, and the object side S5 of the third lens L3 is plane, and image side surface S6 is convex surface, the 4th lens L4
Object side S7 be convex surface, image side surface S8 is concave surface, and the object side S9 of the 5th lens L5 is concave surface, and image side surface S10 is convex surface, the
The object side S11 of six lens L6 is concave surface, and image side surface S12 is concave surface.
At circumference, the object side S1 of the first lens L1 is convex surface, and image side surface S2 is convex surface, the object side of the second lens L2
S3 is convex surface, and image side surface S4 is concave surface, and the object side S5 of the third lens L3 is plane, and image side surface S6 is convex surface, the 4th lens L4
Object side S7 be concave surface, image side surface S8 is convex surface, and the object side S9 of the 5th lens L5 is concave surface, and image side surface S10 is convex surface, the
The object side S11 of six lens L6 is convex surface, and image side surface S12 is convex surface.
In example 2, the effective focal length f of imaging optical system 10 is 2.96, and coke ratio fno is 2.25, the one of field angle
Half HFOV is 43.5 °.In other words, the field angle of embodiment two can achieve 87 °.In addition, the object side S5 of the third lens L3
For plane, imaging optical system 10 includes the infrared cut coating 11 that the object side S5 of the third lens L3 is arranged in.In this way, can subtract
The use of few infrared fileter, shortens the mould group height of entire imaging optical system 10, and saved cost.Specific parameter
As shown in Table 3 and Table 4.
Table 3
Table 4
Embodiment three:
Please refer to Fig. 9 to Figure 12, in embodiment three, imaging optical system 10 from object side to image side successively include five thoroughly
Mirror, i.e. the first lens L1, the second lens L2, the third lens L3, the 4th lens L4 and the 5th lens L5.First lens L1 has just
Refracting power, the second lens L2 have negative refracting power, and the third lens L3 has negative refracting power, and the 4th lens L4 has positive refracting power,
5th lens L5 has negative refracting power.Diaphragm STO is arranged on the object side S1 of the first lens L1.
At optical axis, the object side S1 of the first lens L1 is convex surface, and image side surface S2 is concave surface, the object side of the second lens L2
S3 is plane, and image side surface S4 is concave surface, and the object side S5 of the third lens L3 is convex surface, and image side surface S6 is concave surface, the 4th lens L4
Object side S7 be concave surface, image side surface S8 is convex surface, and the object side S9 of the 5th lens L5 is concave surface, and image side surface S10 is concave surface.
At circumference, the object side S1 of the first lens L1 is convex surface, and image side surface S2 is convex surface, the object side of the second lens L2
S3 is plane, and image side surface S4 is concave surface, and the object side S5 of the third lens L3 is concave surface, and image side surface S6 is convex surface, the 4th lens L4
Object side S7 be concave surface, image side surface S8 is convex surface, and the object side S9 of the 5th lens L5 is convex surface, and image side surface S10 is convex surface.
In the third embodiment, the effective focal length f of imaging optical system 10 is 2.81, and coke ratio fno is 2.26, the one of field angle
Half HFOV is 46 °.In other words, the field angle of embodiment three can achieve 92 °.In addition, the object side S3 of the second lens L2 is
Plane, imaging optical system 10 include the infrared cut coating 11 that the object side S3 of the second lens L2 is arranged in.So, it is possible to reduce
The use of infrared fileter, shortens the mould group height of entire imaging optical system 10, and has saved cost.Specific parameter is such as
Shown in table 5 and table 6.
Table 5
Table 6
Example IV:
Please refer to Figure 13 to Figure 16, in example IV, imaging optical system 10 from object side to image side successively include five thoroughly
Mirror, i.e. the first lens L1, the second lens L2, the third lens L3, the 4th lens L4 and the 5th lens L5.First lens L1 has just
Refracting power, the second lens L2 have negative refracting power, and the third lens L3 has positive refracting power, and the 4th lens L4 has positive refracting power,
5th lens L5 has negative refracting power.Diaphragm STO is arranged on the object side S1 of the first lens L1, specifically, the table of diaphragm STO
Face is overlapped with the object side S1 of the first lens L1.
At optical axis, the object side S1 of the first lens L1 is convex surface, and image side surface S2 is concave surface, the object side of the second lens L2
S3 is concave surface, and image side surface S4 is concave surface, and the object side S5 of the third lens L3 is convex surface, and image side surface S6 is plane, the 4th lens L4
Object side S7 be concave surface, image side surface S8 is convex surface, and the object side S9 of the 5th lens L5 is concave surface, and image side surface S10 is concave surface.
At circumference, the object side S1 of the first lens L1 is convex surface, and image side surface S2 is convex surface, the object side of the second lens L2
S3 is concave surface, and image side surface S4 is concave surface, and the object side S5 of the third lens L3 is concave surface, and image side surface S6 is plane, the 4th lens L4
Object side S7 be concave surface, image side surface S8 is convex surface, and the object side S9 of the 5th lens L5 is convex surface, and image side surface S10 is convex surface.
In example IV, the effective focal length f of imaging optical system 10 is 3.2, and coke ratio fno is 2.25, the one of field angle
Half HFOV is 42 °.In other words, the field angle of example IV can achieve 84 °.In addition, the image side surface S6 of the third lens L3 is
Plane, imaging optical system 10 include the infrared cut coating 11 that the image side surface S6 of the third lens L3 is arranged in.So, it is possible to reduce
The use of infrared fileter, shortens the mould group height of entire imaging optical system 10, and has saved cost.Specific parameter is such as
Shown in table 7 and table 8.
Table 7
Table 8
Figure 17 and Figure 18 are please referred to, the electronic device 100 of embodiment of the present invention includes imaging sensor 20 and above-mentioned
The image side of imaging optical system 10 is arranged in the imaging optical system 10 of one embodiment, imaging sensor 20.
In the electronic device 100 of embodiment of the present invention, contained at least one in multiple lens of imaging optical system 10
Plane, and it is provided with infrared cut coating 11 in the plane, to reduce the use of infrared fileter, shorten entire image optics system
The mould group height of system 10, and saved cost.In addition, the susceptibility of imaging optical system 10 is reduced by the use of plane,
Improve the yield of imaging optical system 10.
Specifically, imaging sensor 20 can use complementary metal oxide semiconductor (CMOS, Complementary
Metal Oxide Semiconductor) imaging sensor or charge coupled cell (CCD, Charge-coupled
Device) imaging sensor.The image side of imaging optical system 10 is arranged in imaging sensor 20, specifically, pick-up lens 10
Optical axis is overlapped with the centre normal of imaging sensor 20.Imaging optical system 10 and imaging sensor 20 constitute electronic device
100 camera mould group 30.
The electronic device 100 of embodiment of the present invention includes but is not limited to for hand-held electronic equipment (mobile phone, plate, pen
Remember this computer, camera, 3D video camera, smartwatch etc.), smart home device, video monitor, gesture detection equipment, temperature
The electronic device of the supports such as sensing apparatus imaging.
In the description of this specification, reference term " certain embodiments ", " embodiment ", " some embodiment party
The description of formula ", " exemplary embodiment ", " example ", " specific example " or " some examples " means in conjunction with the embodiment
Or example particular features, structures, materials, or characteristics described are contained at least one embodiment or example of the invention.
In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, description
Particular features, structures, materials, or characteristics can be in any one or more embodiments or example with suitable side
Formula combines.In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one described feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two,
Three, unless otherwise specifically defined.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant, and the scope of the present invention is defined by the claims and their equivalents.
Claims (10)
1. a kind of imaging optical system, which is characterized in that the imaging optical system includes multiple lens, the multiple lens by
Object side to image side successively includes:
The first lens with positive refracting power, the object sides of first lens are convex surface, the image side surfaces of first lens in
It is concave surface at optical axis, is convex surface at circumference；
The second lens with negative refracting power, the image side surface of second lens are concave surface；
The third lens with refracting power；
The 4th lens with refracting power；With
The 5th lens with refracting power, the image side surface of the 5th lens are convex surface at circumference；
A plane is included at least in the surface of the multiple lens, the imaging optical system further includes being arranged in the plane
On infrared cut coating.
2. imaging optical system according to claim 1, which is characterized in that the multiple lens further include having negative flexion
The image side of the 5th lens is arranged in 6th lens of power, the 6th lens.
3. imaging optical system according to claim 1 or 2, which is characterized in that in the surface of the multiple lens at least
It is aspherical including one.
4. imaging optical system according to claim 1 or 2, which is characterized in that the imaging optical system meets following
Relational expression:
10<TTL*f/tan(HFOV)<18；
Wherein, TTL is spacing on the object side to the axis of imaging sensor of first lens, and f is the imaging optical system
Focal length, HFOV be along described image sensor diagonal field angle half.
5. imaging optical system according to claim 1 or 2, which is characterized in that the imaging optical system meets following
Relational expression:
1<F12/f<2；
Wherein, f is the focal length of the imaging optical system, and F12 is the combined focal length of first lens and second lens.
6. imaging optical system according to claim 1 or 2, which is characterized in that the imaging optical system meets following
Relational expression:
-6<F24/f<1；
Wherein, f is the focal length of the imaging optical system, and F24 is the combined focal length of second lens and the 4th lens.
7. imaging optical system according to claim 1 or 2, which is characterized in that the imaging optical system meets following
Relational expression:
∣V3-V2∣<38；
Wherein, V3 is the abbe number of the third lens, and V2 is the abbe number of second lens.
8. imaging optical system according to claim 1 or 2, which is characterized in that the imaging optical system meets following
Relational expression:
-10<fs/f<30；
Wherein, f be the imaging optical system focal length, fs be the multiple lens in include the plane lens coke
Away from.
9. imaging optical system according to claim 1 or 2, which is characterized in that the object side of second lens is flat
Face, the imaging optical system include the infrared cut coating that the object side of second lens is arranged in；Or
The object side of the third lens is plane, and the imaging optical system includes the object side that the third lens are arranged in
Infrared cut coating；Or
The image side surface of the third lens is plane, and the imaging optical system includes the image side surface that the third lens are arranged in
Infrared cut coating；Or
The image side surface of 4th lens is plane, and the imaging optical system includes the image side surface that the 4th lens are arranged in
Infrared cut coating.
10. a kind of electronic device characterized by comprising
Imaging sensor；And
Imaging optical system described in any one of claim 1-9, described image sensor are arranged in the image optics system
The image side of system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810513158.7A CN110531485A (en) | 2018-05-25 | 2018-05-25 | Imaging optical system and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810513158.7A CN110531485A (en) | 2018-05-25 | 2018-05-25 | Imaging optical system and electronic device |
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|---|---|
| CN110531485A true CN110531485A (en) | 2019-12-03 |
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ID=68657769
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114967073A (en) * | 2022-06-28 | 2022-08-30 | 东莞晶彩光学有限公司 | Short-focus telescopic optical lens |
| US11487089B2 (en) | 2020-01-16 | 2022-11-01 | Largan Precision Co., Ltd. | Image capturing optical lens assembly including five lenses of +−++− or +−−+− refractive powers, imaging apparatus and electronic device |
-
2018
- 2018-05-25 CN CN201810513158.7A patent/CN110531485A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11487089B2 (en) | 2020-01-16 | 2022-11-01 | Largan Precision Co., Ltd. | Image capturing optical lens assembly including five lenses of +−++− or +−−+− refractive powers, imaging apparatus and electronic device |
| CN114967073A (en) * | 2022-06-28 | 2022-08-30 | 东莞晶彩光学有限公司 | Short-focus telescopic optical lens |
| CN114967073B (en) * | 2022-06-28 | 2023-08-01 | 东莞晶彩光学有限公司 | Short-focus telescopic optical lens |
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