CN205826951U - Optical imaging system - Google Patents
Optical imaging system Download PDFInfo
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- CN205826951U CN205826951U CN201620518140.2U CN201620518140U CN205826951U CN 205826951 U CN205826951 U CN 205826951U CN 201620518140 U CN201620518140 U CN 201620518140U CN 205826951 U CN205826951 U CN 205826951U
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Abstract
The utility model discloses an optical imaging system includes first lens, second lens, third lens and fourth lens by thing side to picture side in proper order. The first lens has refractive power, and the object side surface of the first lens can be a convex surface. The second lens element to the third lens element have refractive power, and both surfaces of the first lens element and the second lens element may be aspheric. The fourth lens may have a positive refractive power, both surfaces of which are aspheric, wherein at least one surface of the fourth lens may have an inflection point. The lenses with refractive power in the optical imaging system are a first lens to a fourth lens. When certain conditions are met, the optical imaging device can have larger light receiving capacity and better optical path adjusting capacity so as to improve the imaging quality.
Description
Technical field
This utility model relates to a kind of optical imaging system, and is applied on electronic product particularly to one
Miniaturized optical imaging system.
Background technology
In recent years, along with the rise of the portable type electronic product with camera function, the demand of optical system
Day by day improve.The photo-sensitive cell of general optical system is nothing more than being photosensitive coupling element (Charge Coupled
Device；Or Complimentary Metal-Oxide semiconductor element (Complementary Metal-Oxide CCD)
SemiconduTPor Sensor；CMOS Sensor) two kinds, and progressing greatly along with semiconductor fabrication process,
The Pixel Dimensions making photo-sensitive cell reduces, and optical system gradually develops toward high pixel neighborhoods, therefore to one-tenth
The requirement of picture element amount increases the most day by day.
Tradition is equipped on the optical system on mancarried device, and many employings two or three-chip type lens arrangement are
Main, yet with mancarried device constantly towards improving pixel and terminal consumer's demand example to large aperture
Such as low-light and shooting function at night or the Self-timer of the most preposition camera lens of demand to wide viewing angle.But design
The optical system of large aperture often faces the more aberrations of generation causes periphery image quality deteriorate therewith and make
Making the situation of difficulty, the optical system designing wide viewing angle then can face the aberration rate of imaging
(distortion) improving, existing optical imaging system cannot meet the photography requirement of higher order.
Utility model content
Therefore, the purpose of this utility model embodiment is, it is provided that a kind of technology, how to be effectively increased light
Learn the light-inletting quantity of imaging system and increase the visual angle of optical imaging system, except the total picture improving imaging further
The design of weighing and considering in order to uphold justice of miniaturization optical imaging system can be taken into account outside element and quality simultaneously.
The term of the lens parameter that this utility model embodiment is relevant and its label arrange as follows, as follow-up in detail
The reference described:
Refer to Fig. 7, optical imaging system can include image sensing module (not shown), this image sensing
Module includes substrate and arranges photo-sensitive cell on the substrate；Optical imaging system additionally can include
First lens orientation element 710, and represent with PE1 (Positioning Element 1), this first eyeglass is fixed
Bit unit, includes base and microscope base；This base has open accommodation space, and is arranged at this base
This photo-sensitive cell is made to be positioned in this accommodation space on plate；This microscope base (optional employing is made into integration) is in hollow
And do not have light transmission, and this microscope base has the cylinder portion 7141 and base portion 7142 being interconnected, this cylinder
Portion has predetermined wall thickness TPE1 (Thickness of Positioning Element 1), and this microscope base is on the contrary
Two ends be respectively provided with the first perforation 7143 and the second perforation 7144, this first perforation connects this portion
And this second perforation connects this base portion.The maximum of the minimum length of side that this base portion is perpendicular in the plane of optical axis
Value represents with PhiD.This biperforate maximum inner diameter aperture then represents with Phi2.
Optical imaging system may also include the second lens orientation element 720, and with PE2 (Positioning
Element 2) represent, this second lens orientation element is placed in the microscope base of this first lens orientation element,
And include location division 722 and connecting portion 724.This location division is hollow, and phase on optical axis direction
Anti-two ends are respectively provided with the 3rd perforation 7241 and one the 4th perforation 7242, the 3rd perforation 7241
Connect this location division 722 and the 4th perforation 7242 this base portion 7142 of connection.And there is predetermined wall thickness
TPE2 (Thickness of Positioning Element 2), this location division 722 is directly to contact this practicality newly
The arbitrary eyeglass of type embodiment also produces this eyeglass accommodating and arranges this eyeglass locating effect on optical axis.
This connecting portion 724 is the outside being arranged at this location division 722, can be directly combined to this portion 7141 with
Producing makes this second lens orientation element 720 be placed in the microscope base of this first lens orientation element and make
Optical imaging system possesses the function of the adjusting focal length in optical axis direction and location.This connecting portion is perpendicular to light
Maximum outside diameter in the plane of axle represents with PhiC.4th perforation 7242 maximum inner diameter aperture then with
Phi4 represents.Aforementioned connecting portion 724 can have thread and make this second lens orientation element 720 be screwed together in
In the microscope base of this first lens orientation element.
The arbitrary eyeglass of this utility model embodiment, may select and be directly arranged at this first lens orientation element
In cylinder portion 7141 and relatively this photo-sensitive cell is close to this first perforation 7143, and just to this photo-sensitive cell.This
The arbitrary eyeglass of utility model embodiment, it is possible to select to set indirectly by this second lens orientation element 720
It is placed in this first lens orientation element 710 and relatively this photo-sensitive cell is close to the 3rd perforation 7241, and just
To this photo-sensitive cell.
The term of the lens parameter that this utility model embodiment is relevant and its label arrange as follows, as follow-up in detail
The reference described:
With length or the most relevant lens parameter
The image height of optical imaging system represents with HOI；The height of optical imaging system is with HOS table
Show；Distance between the first lens thing side to the 4th lens image side surface of optical imaging system is with InTL table
Show；4th lens image side surface of optical imaging system represents to the distance between imaging surface with InB；
InTL+InB=HOS；The fixed aperture (aperture) of optical imaging system to the distance between imaging surface with InS
Represent；Distance between the first lens of optical imaging system and the second lens represents (illustration) with IN12；Light
First lens of imaging system thickness on optical axis represents (illustration) with TP1.
The lens parameter relevant with material
The abbe number of the first lens of optical imaging system represents (illustration) with NA1；The folding of the first lens
Penetrate rule and represent (illustration) with Nd1.
The lens parameter relevant with visual angle
Visual angle represents with AF；The half at visual angle represents with HAF；Chief ray angle represents with MRA.
The lens parameter relevant with going out entrance pupil
The entrance pupil diameter of optical imaging system represents with HEP；The emergent pupil of optical imaging system is
Refer to aperture diaphragm battery of lens after aperture diaphragm and at image space imaging, exit pupil whose diameter
Represent with HXP；The maximum effective radius of any surface of single lens refers to that system maximum visual angle is incident
Light passes through the light at entrance pupil edge in this lens surface plotted point (Effective Half Diameter；
EHD), the vertical height between this plotted point and optical axis.The maximum of the such as first lens thing side is effectively
Radius represents with EHD11, and the maximum effective radius of the first lens image side surface represents with EHD12.Second
The maximum effective radius of lens thing side represents with EHD21, maximum effectively the half of the second lens image side surface
Footpath represents with EHD22.The maximum effective radius table of any surface of remaining lens in optical imaging system
Show that mode is by that analogy.In optical imaging system, the maximum closest to the image side surface of the lens of imaging surface is effective
Diameter represents with PhiA, and it meets conditional PhiA=2 times EHD, if this surface is aspheric surface, then
The cut-off point of maximum effective diameter is containing aspheric cut-off point.The nothing of any surface of single lens
Effect radius (Ineffective Half Diameter；IHD) refer to towards extending from same surface away from optical axis direction
The cut-off point of maximum effective radius (if this surface is aspheric surface, i.e. on this surface, have asphericity coefficient
Terminal) surface segment.In optical imaging system, the maximum closest to the image side surface of the lens of imaging surface is straight
Footpath represents with PhiB, and it meets conditional PhiB=2 times (the maximum invalid radius of maximum effective radius EHD+
IHD)=PhiA+2 times (maximum invalid radius IHD).
Closest to the maximum effective diameter of lens image side surface of imaging surface (i.e. image space) in optical imaging system,
Again can be called optics emergent pupil, it represents with PhiA, if optics emergent pupil is positioned at the 3rd lens image side surface,
Represent with PhiA3, if optics emergent pupil is positioned at the 4th lens image side surface, represent with PhiA4, if optics goes out
Pupil is positioned at the 5th lens image side surface and then represents with PhiA5, if optics emergent pupil is positioned at the 6th lens image side surface,
Represent with PhiA6, if optical imaging system has the lens of different tool refractive power sheet number, its optics emergent pupil
Representation is by that analogy.The pupil of optical imaging system is put and is represented than with PMR, and it meets conditional and is
PMR=PhiA/HEP.
The parameter relevant with the lens face shape deflection degree of depth
4th lens thing side intersection point on optical axis is to the maximum effective radius position of the 4th lens thing side
The horizontal displacement distance being placed in optical axis represents (illustration) with InRS41；4th lens image side surface is on optical axis
Intersection point to the 4th lens image side surface maximum effective radius position in optical axis horizontal displacement distance with
InRS42 represents (illustration).
The parameter relevant with lens face type
Critical point C refers on certain lenses surface, and in addition to the intersection point of optical axis, perpendicular with optical axis cuts
The point that face is tangent.Holding, the critical point C31 of the such as the 3rd lens thing side with the vertical dimension of optical axis is
HVT31 (illustrates), and the critical point C32 of the 3rd lens image side surface and the vertical dimension of optical axis are HVT32 (example
Show), the critical point C41 of the 4th lens thing side and the vertical dimension of optical axis are HVT41 (illustration), the
The critical point C42 of four lens image side surface and the vertical dimension of optical axis are HVT42 (illustration).Other lenses
Critical point on thing side or image side surface and with the representation of the vertical dimension of optical axis according to aforementioned.
On 4th lens thing side, the point of inflexion closest to optical axis is IF411, this sinkage SGI411 (example
Show), SGI411 namely the 4th lens thing side intersection point on optical axis is to the 4th lens thing side dipped beam
Horizontal displacement distance parallel with optical axis between the point of inflexion of axle, this point of IF411 vertical with light between centers away from
From for HIF411 (illustration).On 4th lens image side surface, the point of inflexion closest to optical axis is IF421, this point
Sinkage SGI421 (illustrates), and SGI411 namely the 4th lens image side surface intersection point on optical axis are to the 4th
Horizontal displacement distance parallel with optical axis between the point of inflexion of the nearest optical axis of lens image side surface, this point of IF421
It is HIF421 (illustration) with the vertical dimension of light between centers.
On 4th lens thing side, second is IF412 close to the point of inflexion of optical axis, this sinkage
SGI412 (illustrates), and SGI412 namely the 4th lens thing side intersection point on optical axis is to the 4th lens thing side
Face second is close to horizontal displacement distance parallel with optical axis between the point of inflexion of optical axis, IF412 this point and light
The vertical dimension of between centers is HIF412 (illustration).On 4th lens image side surface, second close to the point of inflexion of optical axis
For IF422, this sinkage SGI422 (illustrates), and SGI422 namely the 4th lens image side surface are on optical axis
Intersection point to the 4th lens image side surface second close to the point of inflexion of optical axis between the horizontal position parallel with optical axis
Moving distance, this point of IF422 is HIF422 (illustration) with the vertical dimension of light between centers.
On 4th lens thing side, the 3rd is IF413 close to the point of inflexion of optical axis, this sinkage
SGI413 (illustrates), and SGI413 namely the 4th lens thing side intersection point on optical axis is to the 4th lens thing side
Face the 3rd is close to horizontal displacement distance parallel with optical axis between the point of inflexion of optical axis, IF4132 this point and light
The vertical dimension of between centers is HIF413 (illustration).On 4th lens image side surface, the 3rd close to the point of inflexion of optical axis
For IF423, this sinkage SGI423 (illustrates), and SGI423 namely the 4th lens image side surface are on optical axis
Intersection point to the 4th lens image side surface the 3rd close to the point of inflexion of optical axis between the horizontal position parallel with optical axis
Moving distance, this point of IF423 is HIF423 (illustration) with the vertical dimension of light between centers.
On 4th lens thing side, the 4th is IF414 close to the point of inflexion of optical axis, this sinkage
SGI414 (illustrates), and SGI414 namely the 4th lens thing side intersection point on optical axis is to the 4th lens thing side
Face the 4th is close to horizontal displacement distance parallel with optical axis between the point of inflexion of optical axis, IF414 this point and light
The vertical dimension of between centers is HIF414 (illustration).On 4th lens image side surface, the 4th close to the point of inflexion of optical axis
For IF424, this sinkage SGI424 (illustrates), and SGI424 namely the 4th lens image side surface are on optical axis
Intersection point to the 4th lens image side surface the 4th close to the point of inflexion of optical axis between the horizontal position parallel with optical axis
Moving distance, this point of IF424 is HIF424 (illustration) with the vertical dimension of light between centers.
The point of inflexion on other lenses thing side or image side surface and with the vertical dimension of optical axis or its depression
The representation of amount is according to aforementioned.
The parameter relevant with aberration
The optical distortion (Optical Distortion) of optical imaging system represents with ODT；Its TV distorts
(TV Distortion) represents with TDT, and can limit further and be described in imaging 50% to 100%
The degree of aberration skew between the visual field；Spherical aberration offset amount represents with DFS；Comet aberration side-play amount with
DFC represents.
Modulation transfer function performance plot (the Modulation Transfer of optical imaging system
Function；MTF), for contrast contrast and the sharpness of test and evaluation system imaging.Modulation conversion
The vertical coordinate axle of function characteristic figure represents the contrast rate of transform (numerical value from 0 to 1), horizontal axis then table
Show spatial frequency (cycles/mm；lp/mm；line pairs per mm).Perfect imaging system is theoretical
Upper energy 100% presents the lines contrast of subject, but the imaging system of reality, its vertical axis right
Than rate of transform numerical value less than 1.Additionally, the marginal area of generally speaking imaging can be rareer than central area
To fine reduction degree.Visible light spectrum is on imaging surface, at optical axis, 0.3 visual field and 0.7 visual field three
In the contrast rate of transform (MTF numerical value) of spatial frequency 55cycles/mm respectively with MTFE0, MTFE3
And MTFE7 represents, optical axis, 0.3 visual field and 0.7 visual field three are in spatial frequency 110cycles/mm
The contrast rate of transform (MTF numerical value) represent with MTFQ0, MTFQ3 and MTFQ7 respectively, optical axis,
0.3 visual field and 0.7 visual field three are in the contrast rate of transform (the MTF number of spatial frequency 220cycles/mm
Value) represent with MTFH0, MTFH3 and MTFH7 respectively, optical axis, 0.3 visual field and 0.7 regard
Three be in the contrast rate of transform (MTF numerical value) of spatial frequency 440cycles/mm respectively with MTF0,
MTF3 and MTF7 represents, these three visual fields aforementioned for center, the interior visual field of camera lens and regard outward
Field is representative, and the performance that therefore may be used to evaluate particular optical imaging system is the most excellent.If optics
The design department respective pixel size (Pixel Size) of imaging system is the photo-sensitive cell containing less than 1.12 microns,
Therefore a spatial frequency of four points of modulation transfer function performance plot, half spatial frequency (half frequency) and complete
Total space frequency (full range) is at least 110cycles/mm, 220cycles/mm and 440 respectively
cycles/mm。
If optical imaging system must meet the imaging for infrared spectrum, such as low light source simultaneously
Night vision demand, the operation wavelength used can be 850nm or 800nm, owing to major function is in identification
The contour of object that black and white light and shade is formed, without high-res, therefore can only need to select less than 110
The spatial frequency of cycles/mm evaluate particular optical imaging system infrared spectrum frequency spectrum performance whether
Excellent.Aforementioned operation wavelength 850nm when focusing on imaging surface, image in optical axis, 0.3 visual field and
0.7 visual field three be in the contrast rate of transform (MTF numerical value) of spatial frequency 55cycles/mm respectively with
MTFI0, MTFI3 and MTFI7 represent.But, also because infrared ray operation wavelength 850nm or
800nm and general visible wavelength far, if can be to visible ray with red while that optical imaging system needing
Outside line (bimodulus) is focused and respectively reaches certain performance, has suitable difficulty in design.
There is provided a kind of optical imaging system according to this utility model, thing side include successively to image side:
First lens, have refractive power；
Second lens, have refractive power；
3rd lens, have refractive power；
4th lens, have refractive power；And
Imaging surface, it is four pieces and described first saturating that wherein said optical imaging system has the lens of refractive power
Mirror has at least one point of inflexion at least one surface of at least one lens in described 4th lens, institute
State the first lens at least one lens in described 4th lens and there is positive refractive power, and described 4th saturating
The thing side surface of mirror and surface, image side are aspheric surface, and the focal length of described optical imaging system is f, described
The intersection point of a diameter of HEP of entrance pupil of optical imaging system, described first lens thing side and optical axis is to institute
Stating and have distance HOS between the intersection point of imaging surface and optical axis on optical axis, described first lens thing side is to institute
Stating the 4th lens image side surface and have distance InTL on optical axis, the maximum of described 4th lens image side surface has
Imitate a diameter of PhiA4, described first lens, described second lens, described 3rd lens and described
Four lens 1/2HEP height and be parallel to the thickness of optical axis be respectively ETP1, ETP2, ETP3 and
ETP4, the summation of aforementioned ETP1 to ETP4 is SETP, described first lens, described second lens,
Described 3rd lens and described 4th lens the thickness of optical axis be respectively TP1, TP2, TP3 and
TP4, the summation of aforementioned TP1 to TP4 is STP, and it meets following condition: 1.0≤f/HEP≤10；
0.5≤HOS/f≤20,0 < PhiA4/InTL≤1.4；And 0.5≤SETP/STP < 1.
Preferably, at the coordinate points extremely described imaging surface of 1/2HEP height on described first lens thing side
Between to be parallel to the horizontal range of optical axis be ETL, at 1/2HEP height on described first lens thing side
Between the coordinate points of 1/2HEP height, the water of optical axis it is parallel on coordinate points extremely described 4th lens image side surface
Flat distance is EIN, and it meets following condition: 0.2≤EIN/ETL < 1.
Preferably, described first lens are at 1/2HEP height and to be parallel to the thickness of optical axis be ETP1, institute
At 1/2HEP height and to be parallel to the thickness of optical axis be ETP2 to state the second lens, and described 3rd lens exist
1/2HEP height and to be parallel to the thickness of optical axis be ETP3, described 4th lens at 1/2HEP height and
The thickness being parallel to optical axis is ETP4, and the summation of aforementioned ETP1 to ETP4 is SETP, described first
At 1/2HEP on the coordinate points extremely described 4th lens image side surface of 1/2HEP height on lens thing side
Being parallel to the horizontal range of optical axis between the coordinate points of height is EIN, and it meets following equation:
0.3≤SETP/EIN≤0.8。
Preferably, described optical imaging system includes that filter element, described filter element are positioned at the described 4th
Between lens and described imaging surface, in the coordinate points of 1/2HEP height on described 4th lens image side surface
The distance being extremely parallel to optical axis between described filter element is EIR, with optical axis on described 4th lens image side surface
Intersection point be PIR to being parallel to the distance of optical axis between described filter element, it meets following equation:
0.2≤EIR/PIR≤5.0。
Preferably, it is seen that optical spectrum is perpendicular to optical axis on described imaging surface and has maximum image height HOI,
Optical axis, 0.3HOI and 0.7HOI tri-on described imaging surface are in spatial frequency 110cycles/mm
Modulation conversion contrast the rate of transform (MTF numerical value) respectively with MTFQ0, MTFQ3 and MTFQ7 table
Showing, it meets following condition: MTFQ0 0.3；MTFQ3≧0.2；And MTFQ7 0.01.
Preferably, at the coordinate points extremely described imaging surface of 1/2HEP height on described 4th lens image side surface
Between to be parallel to the horizontal range of optical axis be EBL, with the intersection point of optical axis to institute on described 4th lens image side surface
State imaging surface being parallel to the horizontal range of optical axis is BL, and it meets: 0.2≤EBL/BL≤1.1.
Preferably, described optical imaging system meets following condition: 0 < PhiA4/HEP≤4.0.
Preferably, described optical imaging system be perpendicular on described imaging surface optical axis have maximum become image height
Degree HOI, it meets following equation: 0 < PhiA4/2HOI≤2.0.
Preferably, also including aperture, on described optical axis, described aperture to described imaging surface has distance InS,
Described optical imaging system is provided with image sensing element at described imaging surface, and its described optical imaging system exists
It is perpendicular to optical axis on described imaging surface and there is maximum image height HOI, meet following relationship:
0.2≤InS/HOS≤1.1；And 0.5 < HOS/HOI≤15.
Separately provide a kind of optical imaging system according to this utility model, thing side include successively to image side:
First lens, have refractive power；
Second lens, have refractive power；
3rd lens, have refractive power；
4th lens, have refractive power；
Imaging surface；And
First lens orientation element, it includes microscope base, and described microscope base is hollow and does not have light transmission,
And described microscope base has the cylinder portion and base portion being interconnected, cartridge is in order to accommodating described first lens
To described 4th lens, described base portion is between described 4th lens and described imaging surface, and institute
Stating the outer peripheral edge more than cartridge, the outer peripheral edge of base portion, described base portion is perpendicular in the plane of optical axis
The maximum of the little length of side is PhiD, and it is four pieces that wherein said optical imaging system has the lens of refractive power
And described first lens have at least at least one surface of at least one lens in described 4th lens
One point of inflexion, in described first lens to described 4th lens, at least one lens has positive refractive power,
The focal length of described optical imaging system is f, a diameter of HEP of entrance pupil of described optical imaging system, institute
Have on optical axis between the intersection point of intersection point extremely described imaging surface and the optical axis of stating the first lens thing side and optical axis
Having distance HOS, the half at the maximum visual angle of described optical imaging system is HAF, described 4th lens
The maximum effective diameter of image side surface is PhiA4, at 1/2HEP height on described first lens thing side
The horizontal range being parallel to optical axis between coordinate points extremely described imaging surface is ETL, described first lens thing side
On 1/2HEP height coordinate points on described 4th lens image side surface at the coordinate of 1/2HEP height
The horizontal range being parallel to optical axis between point is EIN, and it meets following condition: 1.0≤f/HEP≤10；
0.5≤HOS/f≤20；0.4≤|tan(HAF)|≤6.0；0mm<PhiD≤4.0mm；0.2≤EIN/ETL<1.
Preferably, on described 3rd lens image side surface in the coordinate points of 1/2HEP height to the most described 4th saturating
The horizontal range being parallel to optical axis on mirror thing side between the coordinate points of 1/2HEP height is ED34, described
Between 3rd lens and described 4th lens, the distance on optical axis is IN34, and it meets following condition:
0.5≤ED34/IN34≤10。
Preferably, on described second lens image side surface in the coordinate points of 1/2HEP height to the most described 3rd saturating
The horizontal range being parallel to optical axis on mirror thing side between the coordinate points of 1/2HEP height is ED23, described
Between first lens and described second lens, the distance on optical axis is IN23, and it meets following condition:
0.1≤ED23/IN23≤5。
Preferably, on described first lens image side surface in the coordinate points of 1/2HEP height to the most described second saturating
The horizontal range being parallel to optical axis on mirror thing side between the coordinate points of 1/2HEP height is ED12, described
Between first lens and described second lens, the distance on optical axis is IN12, and it meets following condition:
0.1≤ED12/IN12≤5。
Preferably, described 4th lens are at 1/2HEP height and to be parallel to the thickness of optical axis be ETP4, institute
Stating the 4th lens thickness on optical axis is TP4, and it meets following condition: 0.5≤ETP4/TP4≤3.0.
Preferably, described optical imaging system meets following condition: 0 < PhiA4/HEP≤4.0.
Preferably, described optical imaging system be perpendicular on described imaging surface optical axis have maximum become image height
Degree HOI, it meets following equation: 0 < PhiA4/2HOI≤2.0.
Preferably, described optical imaging system meets following condition: 0mm < PhiA4≤1.8mm.
Preferably, between described first lens and described second lens, the distance on optical axis is IN12,
And meet following equation: 0 < IN12/f≤5.0.
Preferably, described first lens, described second lens, described 3rd lens and described 4th lens
In at least one lens be that wavelength is less than the light of 500nm and filters element.
Reoffer a kind of optical imaging system according to this utility model, thing side include successively to image side:
First lens, have refractive power；
Second lens, have refractive power；
3rd lens, have refractive power；
4th lens, have refractive power；
Imaging surface；
First lens orientation element, it includes microscope base, and described microscope base is hollow and does not have light transmission,
And described microscope base has the cylinder portion and base portion being interconnected, cartridge is in order to accommodating described first lens
To described 4th lens, described base portion position is between described 4th lens and described imaging surface, and institute
Stating the outer peripheral edge more than cartridge, the outer peripheral edge of base portion, described base portion is perpendicular in the plane of optical axis
The maximum of the little length of side is PhiD；And
Second lens orientation element, it is contained in described microscope base, and includes location division and connecting portion,
Described location division is hollow, and the directly contact of described location division system also houses arbitrary lens, makes described first saturating
Mirror is to described 4th lens arrangement on optical axis, and described connecting portion system is arranged at the outside of described location division also
Directly contact cartridge inner peripheral, the maximum outside diameter that described connecting portion is perpendicular in the plane of optical axis is
PhiC, it is that four pieces and described first lens are to institute that wherein said optical imaging system has the lens of refractive power
State at least one surface of at least one lens in the 4th lens and there is at least one point of inflexion, described first
Lens have positive refractive power, Jiao of described optical imaging system at least one lens in described 4th lens
Away from for f, a diameter of HEP of entrance pupil of described optical imaging system, described first lens thing side and light
The intersection point of axle to described imaging surface and optical axis intersection point between there is on optical axis distance HOS, described first saturating
Mirror thing side to described 4th lens image side surface has distance InTL, described optical imagery system on optical axis
The half at the maximum visual angle of system is HAF, and the maximum effective diameter of described 4th lens image side surface is PhiA4,
On described first lens thing side, the coordinate points at 1/2HEP height is parallel to optical axis between described imaging surface
Horizontal range be ETL, in the coordinate points of 1/2HEP height to the most described on described first lens thing side
The horizontal range being parallel to optical axis on 4th lens image side surface between the coordinate points of 1/2HEP height is EIN,
It meets following condition: 1.0≤f/HEP≤10；0.5≤HOS/f≤15；0.4≤|tan(HAF)|≤6.0；
0<PhiA4/InTL≤1.4；PhiC<PhiD；0mm<PhiD≤4.0mm；0.2≤EIN/ETL<1.
Preferably, it meets following equation: 0 < PhiA4/HEP≤4.0.
Preferably, described optical imaging system be perpendicular on described imaging surface optical axis have maximum become image height
Degree HOI, it meets following equation: 0 < PhiA4/2HOI≤2.0.
Preferably, described optical imaging system meets following condition: 0mm < PhiA4≤1.8mm.
Preferably, described system is perpendicular to optical axis on described imaging surface and has maximum image height HOI,
Described optical imaging system relative illumination at described maximum image height HOI represents with RI, it is seen that
Optical spectrum optical axis on described imaging surface, 0.3HOI and 0.7HOI tri-are in spatial frequency 55
The modulation conversion contrast rate of transform of cycles/mm represents with MTFE0, MTFE3 and MTFE7 respectively,
It meets following condition: MTFE0 0.3；MTFE3≧0.2；MTFE7 0.1 and
10%≤RI < 100%.
Preferably, described optical imaging system also includes aperture, image sensing element and drives module,
Described image sensing element is arranged on described imaging surface, and described aperture to described imaging surface have away from
From InS, described driving module can be coupled with described first lens to described 4th lens and make described the
One lens produce displacement to described 4th lens, and it meets: 0.2≤InS/HOS≤1.1.
Single lens, at the thickness of 1/2 entrance pupil diameter (HEP) height, affects this 1/2 entrance pupil straight especially
In the range of footpath (HEP), each smooth linear field common area revises optical path difference between aberration and each field rays
Ability, thickness is the biggest, and the ability revising aberration improves, but also can increase being stranded in the manufacturing simultaneously
Difficulty, it is therefore necessary to control the single lens thickness at 1/2 entrance pupil diameter (HEP) height, particularly
Control these lens at the thickness (ETP) of 1/2 entrance pupil diameter (HEP) height and these lens belonging to this surface
The proportionate relationship (ETP/TP) between thickness (TP) on optical axis.Such as first lens are straight at 1/2 entrance pupil
The thickness of footpath (HEP) height represents with ETP1.Second lens are at 1/2 entrance pupil diameter (HEP) height
Thickness represents with ETP2.In optical imaging system, remaining lens is at 1/2 entrance pupil diameter (HEP) height
Thickness, its representation is by that analogy.The summation of aforementioned ETP1 to ETP4 is SETP, and this practicality is new
The embodiment of type can meet following equation: 0.3≤SETP/EIN≤0.8.
Revise the ability of aberration for weighing to improve simultaneously and reduce the degree of difficulty on manufacturing, needing especially
Control these lens thickness (ETP) and these lens thickness on optical axis at 1/2 entrance pupil diameter (HEP) height
Proportionate relationship (ETP/TP) between degree (TP).Such as first lens are at 1/2 entrance pupil diameter (HEP) height
Thickness represents with ETP1, and first lens thickness on optical axis is TP1, and ratio between the two is
ETP1/TP1.Second lens represent with ETP2 at the thickness of 1/2 entrance pupil diameter (HEP) height, the
Two lens thickness on optical axis is TP2, and ratio between the two is ETP2/TP2.Optical imaging system
In remaining lens at thickness and these lens thickness (TP) on optical axis of 1/2 entrance pupil diameter (HEP) height
Between proportionate relationship, its representation is by that analogy.Embodiment of the present utility model can meet following equation:
0.5≤ETP/TP≤3。
Adjacent two lens represent with ED in the horizontal range of 1/2 entrance pupil diameter (HEP) height, aforementioned water
Flat distance (ED) is the optical axis being parallel to optical imaging system, and affects this 1/2 entrance pupil diameter especially
(HEP) each smooth linear field common area in position revise the ability of optical path difference between aberration and each field rays,
Horizontal range is the biggest, and the probability of the ability revising aberration will improve, but the most also can increase production system
The degree of difficulty made and limit the length of optical imaging system " micro " and degree, it is therefore necessary to control spy
Fixed adjacent two lens are in the horizontal range (ED) of 1/2 entrance pupil diameter (HEP) height.
The ability revising aberration and the length reducing optical imaging system is improved for weighing simultaneously " micro "
Degree of difficulty, need to control especially these adjacent two lens 1/2 entrance pupil diameter (HEP) height level away from
Proportionate relationship (ED/IN) between (ED) two lens adjacent with this horizontal range (IN) on optical axis.Such as
First lens and the second lens represent with ED12 in the horizontal range of 1/2 entrance pupil diameter (HEP) height,
First lens and second lens horizontal range on optical axis are IN12, and ratio between the two is
ED12/IN12.Second lens and the 3rd lens 1/2 entrance pupil diameter (HEP) height horizontal range with
ED23 represents, the second lens and the 3rd lens horizontal range on optical axis are IN23, ratio between the two
Value is ED23/IN23.In optical imaging system, remaining adjacent two lens is at 1/2 entrance pupil diameter (HEP)
Horizontal range two lens adjacent with this of height horizontal range on optical axis proportionate relationship between the two, its
Representation is by that analogy.
On 4th lens image side surface, the coordinate points in 1/2HEP height is parallel to optical axis between this imaging surface
Horizontal range be EBL, on the 4th lens image side surface, the intersection point with optical axis is parallel to light to this imaging surface
The horizontal range of axle is BL, and embodiment of the present utility model is that balance improves the ability revising aberration simultaneously
And the receiving space of reserved other optical elements, following equation can be met: 0.2≤EBL/BL≤1.1.Light
Learn imaging system and can also include filter element, this filter element be positioned at the 4th lens and this imaging surface it
Between, on the 4th lens image side surface, the coordinate points in 1/2HEP height is parallel to light between this filter element
The distance of axle is EIR, and the 4th lens image side surface is parallel to between this filter element with the intersection point of optical axis
The distance of optical axis is PIR, and embodiment of the present utility model can meet following equation: 0.2≤EIR/PIR≤5.0.
Aforementioned optical imaging system may be used to collocation and is imaged on catercorner length is below 1/1.2 inch of size
Image sensing element, the preferred person of size of this image sensing element is 1/2.3 inch, this image sensing
The Pixel Dimensions of element is less than 1.12 microns (μm) less than 1.4 microns (μm), preferably its Pixel Dimensions,
Its Pixel Dimensions of the best is less than 0.9 micron (μm).Additionally, this optical imaging system is applicable to length and width
Than the image sensing element for 16:9.
Aforementioned optical imaging system is applicable to the shadow of shooting with video-corder of more than million or ten million pixel and requires (such as
4K2K or title UHD, QHD) and have good image quality.
As | f1 | > f4 time, the system total height (HOS of optical imaging system；Height of Optic System)
Can suitably shorten to reach the purpose of miniaturization.
As | f2 |+| f3 | > | f1 |+| f4 |, by the second lens to the 3rd lens, at least one is saturating
Mirror has weak positive refractive power or weak negative refractive power.Alleged weak refractive power, refers to the focal length of certain lenses
Absolute value more than 10.When in this utility model the second lens to the 3rd lens, at least one lens has weak
Positive refractive power, it can effectively be shared the positive refractive power of the first lens and avoid unnecessary aberration to go out too early
Existing, if the second anti-lens have weak negative refractive power at least one lens in the 3rd lens, the most permissible
The aberration of fine setting correcting system.
4th lens can have positive refractive power, it addition, at least one surface of the 4th lens can have at least
One point of inflexion, can effectively suppress the angle that off-axis field rays is incident, can modified off-axis regard further
The aberration of field.
This utility model provides a kind of optical imaging system, the thing side of its 4th lens or image side surface to arrange
Have the point of inflexion, can effectively adjust each visual field and be incident in the angle of the 4th lens, and for optical distortion with
TV distortion makes corrections.It addition, the surface of the 4th lens can possess more preferable optical path adjusting ability, with
Improve image quality.
The optical imaging system of this utility model embodiment, it is possible to utilize the refractive power of four lens, convex surface
(convex surface described in the utility model or concave surface refer to thing side or the picture of each lens in principle with the combination of concave surface
Side geometry on optical axis describes), and by the organ of little wall thickness in order to position lens
Design, and then be effectively improved the light-inletting quantity of optical imaging system and the visual angle increasing optical imaging system,
It is provided simultaneously with certain relative illumination and improves total pixel and the quality of imaging, to be applied to small-sized or narrow limit
On the electronic product of frame.
Accompanying drawing explanation
The above-mentioned and other feature of this utility model will describe in detail by referring to accompanying drawing.
Figure 1A is the schematic diagram of the optical imaging system representing this utility model first embodiment；
Figure 1B represent the most successively the optical imaging system of this utility model first embodiment spherical aberration,
Astigmatism and the curve chart of optical distortion；
Fig. 1 C is that the visible light spectrum modulation representing this utility model first embodiment optical imaging system turns
Change characteristic pattern；
Fig. 1 D is that the optical imaging system representing this utility model first embodiment optical imaging system is becoming
The numerical value figure of the relative illumination of each visual field in image planes；
Fig. 2 A is the schematic diagram of the optical imaging system representing this utility model the second embodiment；
Fig. 2 B represent the most successively the optical imaging system of this utility model the second embodiment spherical aberration,
Astigmatism and the curve chart of optical distortion；
Fig. 2 C is that the visible light spectrum modulation representing this utility model the second embodiment optical imaging system turns
Change characteristic pattern；
Fig. 2 D is that the optical imaging system representing this utility model the second embodiment optical imaging system is becoming
The numerical value figure of the relative illumination of each visual field in image planes；
Fig. 3 A is the schematic diagram of the optical imaging system representing this utility model the 3rd embodiment；
Fig. 3 B represent the most successively the optical imaging system of this utility model the 3rd embodiment spherical aberration,
Astigmatism and the curve chart of optical distortion；
Fig. 3 C is that the visible light spectrum modulation representing this utility model the 3rd embodiment optical imaging system turns
Change characteristic pattern；
Fig. 3 D is that the optical imaging system representing this utility model the 3rd embodiment optical imaging system is becoming
The numerical value figure of the relative illumination of each visual field in image planes；
Fig. 4 A is the schematic diagram of the optical imaging system representing this utility model the 4th embodiment；
Fig. 4 B represent the most successively the optical imaging system of this utility model the 4th embodiment spherical aberration,
Astigmatism and the curve chart of optical distortion；
Fig. 4 C is that the visible light spectrum modulation representing this utility model the 4th embodiment optical imaging system turns
Change characteristic pattern；
Fig. 4 D is that the optical imaging system representing this utility model the 4th embodiment optical imaging system is becoming
The numerical value figure of the relative illumination of each visual field in image planes；
Fig. 5 A is the schematic diagram of the optical imaging system representing this utility model the 5th embodiment；
Fig. 5 B represent the most successively the optical imaging system of this utility model the 5th embodiment spherical aberration,
Astigmatism and the curve chart of optical distortion；
Fig. 5 C is that the visible light spectrum modulation representing this utility model the 5th embodiment optical imaging system turns
Change characteristic pattern；
Fig. 5 D is that the optical imaging system representing this utility model the 5th embodiment optical imaging system is becoming
The numerical value figure of the relative illumination of each visual field in image planes；
Fig. 6 A is the schematic diagram of the optical imaging system representing this utility model sixth embodiment；
Fig. 6 B represent the most successively the optical imaging system of this utility model sixth embodiment spherical aberration,
Astigmatism and the curve chart of optical distortion；
Fig. 6 C is that the visible light spectrum modulation representing this utility model sixth embodiment optical imaging system turns
Change characteristic pattern；
Fig. 6 D is that the optical imaging system representing this utility model sixth embodiment optical imaging system is becoming
The numerical value figure of the relative illumination of each visual field in image planes；
Fig. 7 is that the 4th lens image side surface of the optical imaging system representing each embodiment of this utility model is maximum
Effective diameter PhiA4, the 4th lens image side surface maximum gauge PhiB, the base portion of the first lens orientation element
Minimum length of side PhiD, the connecting portion of the second lens orientation element that are perpendicular in the plane of optical axis are perpendicular to
Maximum outside diameter in the plane of optical axis is the position view of PhiC.
Description of reference numerals
Optical imaging system: 10,20,30,40,50,60
Aperture: 100,200,300,400,500,600
First lens: 110,210,310,410,510,610
Thing side: 112,212,312,412,512,612
Image side surface: 114,214,314,414,514,614
Second lens: 120,220,320,420,520,620
Thing side: 122,222,322,422,522,622
Image side surface: 124,224,324,424,524,624
3rd lens: 130,230,330,430,530,630
Thing side: 132,232,332,432,532,632
Image side surface: 134,234,334,434,534,634
4th lens: 140,240,340,440,540,640
Thing side: 142,242,342,442,542,642
Image side surface: 144,244,344,444,544,644
First lens orientation element 710
Cylinder portion 7141
Base portion 7142
First perforation 7143
Second perforation 7144
Second lens orientation element 720
Location division 722
Connecting portion 724
3rd perforation 7241
4th perforation 7242
Infrared filter: 170,270,370,470,570,670
Imaging surface: 180,280,380,480,580,680
Image sensing element: 190,290,390,490,590,690
Symbol description
The focal length of optical imaging system: f
The focal length of the first lens: f1；The focal length of the second lens: f2；The focal length of the 3rd lens: f3；The
The focal length of four lens: f4
The f-number of optical imaging system: f/HEP；Fno；F#
The half at the maximum visual angle of optical imaging system: HAF
The abbe number of the first lens: NA1
The abbe number of the second lens to the 4th lens: NA2, NA3, NA4
First lens thing side and the radius of curvature of image side surface: R1, R2
Second lens thing side and the radius of curvature of image side surface: R3, R4
3rd lens thing side and the radius of curvature of image side surface: R5, R6
4th lens thing side and the radius of curvature of image side surface: R7, R8
First lens thickness on optical axis: TP1
Second lens to the 4th lens thickness on optical axis: TP2, TP3, TP4
The thickness summation of the lens of all tool refractive powers: Σ TP
First lens and second lens spacing distance on optical axis: IN12
Second lens and the 3rd lens spacing distance on optical axis: IN23
3rd lens and the 4th lens spacing distance on optical axis: IN34
4th lens thing side intersection point on optical axis is to the maximum effective radius position of the 4th lens thing side
Put the horizontal displacement distance at optical axis: InRS41
Closest to the point of inflexion of optical axis: IF411 on 4th lens thing side；This sinkage: SGI411
Closest to the point of inflexion and the vertical dimension of light between centers: the HIF411 of optical axis on 4th lens thing side
Closest to the point of inflexion of optical axis: IF421 on 4th lens image side surface；This sinkage: SGI421
Closest to the point of inflexion and the vertical dimension of light between centers: the HIF421 of optical axis on 4th lens image side surface
On 4th lens thing side, second close to the point of inflexion of optical axis: IF412；This sinkage: SGI412
The 4th lens thing side second point of inflexion close to optical axis and the vertical dimension of light between centers: HIF412
On 4th lens image side surface, second close to the point of inflexion of optical axis: IF422；This sinkage: SGI422
The 4th lens image side surface second point of inflexion close to optical axis and the vertical dimension of light between centers: HIF422
On 4th lens thing side, the 3rd close to the point of inflexion of optical axis: IF413；This sinkage: SGI413
The 4th lens thing side the 3rd point of inflexion close to optical axis and the vertical dimension of light between centers: HIF413
On 4th lens image side surface, the 3rd close to the point of inflexion of optical axis: IF423；This sinkage: SGI423
The 4th lens image side surface the 3rd point of inflexion close to optical axis and the vertical dimension of light between centers: HIF423
On 4th lens thing side, the 4th close to the point of inflexion of optical axis: IF414；This sinkage: SGI414
The 4th lens thing side the 4th point of inflexion close to optical axis and the vertical dimension of light between centers: HIF414
On 4th lens image side surface, the 4th close to the point of inflexion of optical axis: IF424；This sinkage: SGI424
The 4th lens image side surface the 4th point of inflexion close to optical axis and the vertical dimension of light between centers: HIF424
The critical point of the 4th lens thing side: C41；The critical point of the 4th lens image side surface: C42
The critical point of the 4th lens thing side and the horizontal displacement distance of optical axis: SGC41
The critical point of the 4th lens image side surface and the horizontal displacement distance of optical axis: SGC42
The critical point of the 4th lens thing side and the vertical dimension of optical axis: HVT41
The critical point of the 4th lens image side surface and the vertical dimension of optical axis: HVT42
System total height (the first lens thing side to imaging surface distance on optical axis): HOS
The catercorner length of image sensing element: Dg；Aperture is to the distance of imaging surface: InS
The distance of the first lens thing side to the 4th lens image side surface: InTL
4th lens image side surface is to the distance of this imaging surface: InB
The half (maximum image height) of image sensing element effective sensing region diagonal line length: HOI
Optical imaging system knot as time TV distort (TV Distortion): TDT
Optical imaging system knot as time optical distortion (Optical Distortion): ODT
Detailed description of the invention
A kind of optical imaging system, thing side to image side include successively having the first lens of refractive power, second
Lens, the 3rd lens and the 4th lens.Optical imaging system may also include image sensing element, and it sets
Put at imaging surface.
Optical imaging system can use three operation wavelengths to be designed, respectively 486.1nm, 587.5nm,
656.2nm, wherein 587.5nm be Primary Reference wavelength be the reference wavelength of main extractive technique feature.
Optical imaging system is used as five operation wavelengths and is designed, respectively 470nm, 510nm,
555nm, 610nm, 650nm, wherein 555nm be Primary Reference wavelength be that main extractive technique is special
The reference wavelength levied.
The ratio of focal distance f p of the focal distance f of optical imaging system and the most a piece of lens with positive refractive power
The ratio of focal distance f n of PPR, the focal distance f of optical imaging system and the most a piece of lens with negative refractive power
NPR, the PPR summation of the lens of all positive refractive powers is Σ PPR, the lens of all negative refractive powers
NPR summation is Σ NPR, contributes to controlling the total dioptric power of optical imaging system when meeting following condition
And total length: 0.5≤Σ PPR/ | Σ NPR |≤4.5, it is preferable that can meet following condition:
0.9≤ΣPPR/|ΣNPR|≤3.5。
The system height of optical imaging system is HOS, when HOS/f ratio level off to 1 time, will be favourable
In making miniaturization and can the optical imaging system of imaging very-high solution.
The summation of focal distance f p of the most a piece of lens with positive refractive power of optical imaging system is Σ PP, often
The focal length summation of a piece of lens with negative refractive power is Σ NP, optical imaging system of the present utility model
A kind of embodiment, it meets following condition: 0 < Σ PP≤200；And f4/ Σ PP≤0.85.Preferably,
Following condition can be met: 0 < Σ PP≤150；And 0.01≤f4/ Σ PP≤0.7.Thus, contribute to controlling light
Learn the focusing power of imaging system, and the positive refractive power of suitable distribution system is to suppress significant aberration mistake
Early produce.
Optical imaging system can also include image sensing element, and it is arranged on imaging surface.Image sensing element
The effectively half (be the image height of optical imaging system or claim maximum image height) of sensing region diagonal line length
For HOI, the first lens thing side to imaging surface distance on optical axis is HOS, and it meets following condition:
0.5<HOS/HOI≤15；And 0.5≤HOS/f≤20.0.Preferably, following condition can be met:
1≤HOS/HOI≤10；And 0.5≤HOS/f≤15.Thus, the miniaturization of optical imaging system can be maintained,
To be equipped on frivolous portable electronic product.
It addition, in optical imaging system of the present utility model, at least one aperture can be arranged on demand, with
Reduce veiling glare, be favorably improved picture quality.
In optical imaging system of the present utility model, aperture configuration can be preposition aperture or in put aperture, its
In preposition aperture imply that aperture is arranged between object and the first lens, in put aperture and then represent that aperture is arranged
Between the first lens and imaging surface.If aperture is preposition aperture, the emergent pupil of optical imaging system can be made and become
Image planes produce longer distance and house more optical elements, and can increase image sensing element reception image
Efficiency；Put aperture in if, contribute to the angle of visual field of expansion system, make optical imaging system have extensively
The advantage of angle mirror head.Aforementioned aperture is InS to the distance between imaging surface, and it meets following condition:
0.2≤InS/HOS≤1.1.Preferably, following condition can be met: 0.4≤InS/HOS≤1 thus, can be simultaneously
Take into account the miniaturization maintaining optical imaging system and the characteristic possessing Radix Rumicis.
In optical imaging system of the present utility model, between the first lens thing side to the 4th lens image side surface
Distance is InTL, and the thickness summation Σ TP of the lens of all tool refractive powers on optical axis, it meets following
Condition: 0.2≤Σ TP/InTL≤0.95.Preferably, following condition can be met: 0.2≤Σ TP/InTL≤0.9.
Thus, when can take into account simultaneously the contrast of system imaging and the yield of lens manufacture and provide suitable after
Focal length is with other elements accommodating.
The radius of curvature of the first lens thing side is R1, and the radius of curvature of the first lens image side surface is R2,
It meets following condition: 0.01≤| R1/R2 |≤100.Preferably, following condition can be met:
0.01≤|R1/R2|≤60。
The radius of curvature of the 4th lens thing side is R7, and the radius of curvature of the 4th lens image side surface is R8,
It meets following condition :-200 < (R7-R8)/(R7+R8) < 30.Thus, be conducive to revising optical imagery system
The produced astigmatism of system.
First lens and second lens spacing distance on optical axis are IN12, and it meets following condition:
0<IN12/f≤5.0.Preferably, following condition can be met: 0.01≤IN12/f≤4.0.Thus, contribute to changing
The aberration of kind lens is to improve its performance.
Second lens and the 3rd lens spacing distance on optical axis are IN23, and it meets following condition:
0<IN23/f≤5.0.Preferably, following condition can be met: 0.01≤IN23/f≤3.0.Thus, contribute to changing
The performance of kind lens.
3rd lens and the 4th lens spacing distance on optical axis are IN34, and it meets following condition:
0<IN34/f≤5.0.Preferably, following condition can be met: 0.001≤IN34/f≤3.0.Thus, contribute to
Improve the performance of lens.
First lens and second lens thickness on optical axis are respectively TP1 and TP2, and it meets following
Condition: 1≤(TP1+IN12)/TP2≤20.Thus, contribute to controlling the sensitivity that optical imaging system manufactures
Spend and improve its performance.
3rd lens and the 4th lens thickness on optical axis are respectively TP3 and TP4, aforementioned two lens
Spacing distance on optical axis is IN34, and it meets following condition: 0.2≤(TP4+IN34)/TP4≤20.
Thus, contribute to controlling the sensitivity of optical imaging system manufacture and reducing system total height.
Second lens and the 3rd lens spacing distance on optical axis are IN23, and the first lens are saturating to the 4th
Mirror summation distance on optical axis is Σ TP, and it meets following condition:
0.01≤IN23/(TP2+IN23+TP3)≤0.9.Preferably, following condition can be met:
0.05≤IN23/(TP2+IN23+TP3)≤0.7.Thus help correction incident illumination traveling process institute the most a little
Produce aberration and reduce system total height.
In optical imaging system of the present utility model, the 4th lens thing side 142 intersection point on optical axis is extremely
The maximum effective radius position of the 4th lens thing side 142 in the horizontal displacement distance of optical axis is
InRS41 (if horizontal displacement is towards image side, InRS41 be on the occasion of；If horizontal displacement is towards thing side, InRS41
For negative value), the 4th lens image side surface 144 intersection point on optical axis to the 4th lens image side surface 144 is
Big effective radius position is InRS42 in the horizontal displacement distance of optical axis, and the 4th lens 140 are on optical axis
Thickness be TP4, it meets following condition :-1mm≤InRS41≤1mm；-1mm≤InRS42≤1mm；
1mm≤|InRS41|+|InRS42|≤2mm；0.01≤|InRS41|/TP4≤10；
0.01≤|InRS42|/TP4≤10.Thus, maximum effective radius position between the 4th lens two sides can be controlled,
And contribute to the lens error correction of the surrounding visual field of optical imaging system and effectively maintain its miniaturization.
In optical imaging system of the present utility model, the 4th lens thing side intersection point on optical axis is to the 4th
Horizontal displacement distance parallel with optical axis between the point of inflexion of the nearest optical axis in lens thing side is with SGI411 table
Show, the point of inflexion of the 4th lens image side surface intersection point on optical axis to the 4th nearest optical axis of lens image side surface it
Between the horizontal displacement distance parallel with optical axis represent with SGI421, it meets following condition:
0<SGI411/(SGI411+TP4)≤0.9；0<SGI421/(SGI421+TP4)≤0.9.Preferably, can expire
Foot row condition: 0.01 < SGI411/ (SGI411+TP4)≤0.7；
0.01<SGI421/(SGI421+TP4)≤0.7。
Anti-to the 4th lens thing side second close to optical axis of 4th lens thing side intersection point on optical axis
Between bent point, the horizontal displacement distance parallel with optical axis represents with SGI412, and the 4th lens image side surface is at light
Intersection point on axle to the 4th lens image side surface second close to the point of inflexion of optical axis between the water parallel with optical axis
Flat shift length represents with SGI422, and it meets following condition: 0 < SGI412/ (SGI412+TP4)≤0.9；
0<SGI422/(SGI422+TP4)≤0.9.Preferably, following condition can be met:
0.1≤SGI412/(SGI412+TP4)≤0.8；0.1≤SGI422/(SGI422+TP4)≤0.8.
The point of inflexion of the 4th nearest optical axis in lens thing side represents with HIF411 with the vertical dimension of light between centers,
4th lens image side surface intersection point on optical axis is to the point of inflexion of the 4th nearest optical axis of lens image side surface and light
The vertical dimension of between centers represents with HIF421, and it meets following condition: 0.01≤HIF411/HOI≤0.9；
0.01≤HIF421/HOI≤0.9.Preferably, following condition can be met: 0.09≤HIF411/HOI≤0.5；
0.09≤HIF421/HOI≤0.5。
4th lens thing side second close to the point of inflexion of optical axis and the vertical dimension of light between centers with HIF412
Represent, anti-to the 4th lens image side surface second close to optical axis of the 4th lens image side surface intersection point on optical axis
Bent point represents with HIF422 with the vertical dimension of light between centers, and it meets following condition:
0.01≤HIF412/HOI≤0.9；0.01≤HIF422/HOI≤0.9.Preferably, following condition can be met:
0.09≤HIF412/HOI≤0.8；0.09≤HIF422/HOI≤0.8.
4th lens thing side the 3rd close to the point of inflexion of optical axis and the vertical dimension of light between centers with HIF413
Represent, anti-to the 4th lens image side surface the 3rd close to optical axis of the 4th lens image side surface intersection point on optical axis
Bent point represents with HIF423 with the vertical dimension of light between centers, and it meets following condition: 0.001
mm≤|HIF413|≤5mm；0.001mm≤|HIF423|≤5mm.Preferably, can meet following
Condition: 0.1mm≤| HIF423 |≤3.5mm；0.1mm≤|HIF413|≤3.5mm.
4th lens thing side the 4th close to the point of inflexion of optical axis and the vertical dimension of light between centers with HIF414
Represent, anti-to the 4th lens image side surface the 4th close to optical axis of the 4th lens image side surface intersection point on optical axis
Bent point represents with HIF424 with the vertical dimension of light between centers, and it meets following condition: 0.001
mm≤|HIF414|≤5mm；0.001mm≤|HIF424|≤5mm.Preferably, can meet following
Condition: 0.1mm≤| HIF424 |≤3.5mm；0.1mm≤|HIF414|≤3.5mm.
A kind of embodiment of optical imaging system of the present utility model, can by have high abbe number with
The lens of low abbe number are staggered, and help the correction of optical imaging system aberration.
Above-mentioned aspheric equation is:
Z=ch2/[1+[1(k+1)c2h2]0.5]+A4h4+A6h6+A8h8+A10h10+A12h12+A14h14+A16
h16+A18h18+A20h20+…(1)
Wherein, z is the positional value making reference along optical axis direction in the position that height is h with surface vertices, k
For conical surface coefficient, c is the inverse of radius of curvature, and A4, A6, A8, A10, A12, A14, A16,
A18 and A20 is order aspherical coefficients.
In the optical imaging system that this utility model provides, the material of lens can be plastic cement or glass.When thoroughly
Mirror material is plastic cement, can effectively reduce production cost and weight.The another material working as lens is glass, then
Heat effect can be controlled and increase the design space of optical imaging system refractive power configuration.Additionally, optics
In imaging system, thing side and the image side surface of the first lens to the 4th lens can be aspheric surface, and it can obtain relatively
Many controlled variables, in addition in order to cut down aberration, even can reduce compared to the use of traditional glass lens
The number that lens use, therefore can effectively reduce the total height of this utility model optical imaging system.
Furthermore, in the optical imaging system that this utility model provides, if lens surface is convex surface, then it represents that
Lens surface is convex surface at dipped beam axle；If lens surface is concave surface, then it represents that lens surface is at dipped beam axle
Place is concave surface.
It addition, in optical imaging system of the present utility model, at least one diaphragm can be arranged on demand, with
Reduce veiling glare, be favorably improved picture quality.
The also visual demand of optical imaging system of the present utility model is applied in the optical system of mobile focusing,
And have the characteristic of excellent lens error correction and good image quality concurrently, thus expand application.
The also visual demand of optical imaging system of the present utility model includes driving module, and this driving module can be with
Those lens are coupled and make those lens produce displacement.Aforementioned driving module can be voice coil motor
(VCM) it is used for driving camera lens to focus, or is used for reducing shot for the anti-hands of the optics element (OIS) that shakes
Journey is caused occurrence frequency out of focus because of camera lens vibration.
The also visual demand of optical imaging system of the present utility model makes the first lens, the second lens, the 3rd saturating
In mirror and the 4th lens, at least one lens is that wavelength is less than the light of 500nm and filters element, and it can pass through
On at least one surface of the lens of this specific tool filtering function, plated film or this lens itself i.e. can be filtered by tool
Except reaching made by the material of short wavelength.
According to above-mentioned embodiment, specific embodiment set forth below also coordinates graphic being described in detail.
First embodiment
Refer to Figure 1A and Figure 1B, wherein Figure 1A represents according to this utility model first embodiment
Planting the schematic diagram of optical imaging system, Figure 1B is followed successively by the optical imagery system of first embodiment from left to right
Spherical aberration, astigmatism and the optical distortion curve chart of system.Fig. 1 C is that the visible light spectrum representing the present embodiment is adjusted
Converting characteristic figure processed.Fig. 1 D is that the light representing this utility model first embodiment optical imaging system studies
As system numerical value figure of the relative illumination of each visual field on imaging surface.From Figure 1A, optical imagery system
System 10 is included first lens the 110, second lens 120, aperture the 100, the 3rd successively by thing side to image side
Lens the 130, the 4th lens 140, infrared filter 170, imaging surface 180 and image sensing element
190。
First lens 110 have negative refractive power, and are glass material, and its thing side 112 is convex surface, its
Image side surface 114 is concave surface, and is aspheric surface.First lens thickness on optical axis is TP1, first
Lens represent with ETP1 at the thickness of 1/2 entrance pupil diameter (HEP) height.
First lens thing side intersection point on optical axis is to the point of inflexion of the first nearest optical axis in lens thing side
Between the horizontal displacement distance parallel with optical axis represent with SGI111, the first lens image side surface is on optical axis
Intersection point to horizontal displacement parallel with optical axis between the point of inflexion of the first nearest optical axis of lens image side surface away from
Representing from SGI121, it meets following condition: SGI111=0mm；SGI121=0mm；
| SGI111 |/(| SGI111 |+TP1)=0；| SGI121 |/(| SGI121 |+TP1)=0.
First lens thing side intersection point on optical axis is to the point of inflexion of the first nearest optical axis in lens thing side
Represent with HIF111 with the vertical dimension of light between centers, first lens image side surface intersection point on optical axis to
The point of inflexion of the one nearest optical axis of lens image side surface represents with HIF121 with the vertical dimension of light between centers, and it is full
Foot row condition: HIF111=0mm；HIF121=0mm；HIF111/HOI=0；HIF121/HOI=0.
Second lens 120 have positive refractive power, and are plastic cement material, and its thing side 122 is concave surface, its
Image side surface 124 is convex surface, and is aspheric surface, and its thing side 122 has the point of inflexion.Second lens
Thickness on optical axis is TP2, the second lens 1/2 entrance pupil diameter (HEP) height thickness with ETP2
Represent.
Second lens thing side intersection point on optical axis is to the point of inflexion of the second nearest optical axis in lens thing side
Between the horizontal displacement distance parallel with optical axis represent with SGI211, the second lens image side surface is on optical axis
Intersection point to horizontal displacement parallel with optical axis between the point of inflexion of the second nearest optical axis of lens image side surface away from
Representing from SGI221, it meets following condition: SGI211=-0.13283mm；
| SGI211 |/(| SGI211 |+TP2)=0.05045.
Second lens thing side intersection point on optical axis is to the point of inflexion of the second nearest optical axis in lens thing side
Represent with HIF211 with the vertical dimension of light between centers, second lens image side surface intersection point on optical axis to
The point of inflexion of the two nearest optical axises of lens image side surface represents with HIF221 with the vertical dimension of light between centers, and it is full
Foot row condition: HIF211=2.10379mm；HIF211/HOI=0.69478.
3rd lens 130 have negative refractive power, and are plastic cement material, and its thing side 132 is concave surface, its
Image side surface 134 is concave surface, and is aspheric surface, and its image side surface 134 has the point of inflexion.3rd lens
Thickness on optical axis is TP3, the 3rd lens 1/2 entrance pupil diameter (HEP) height thickness with ETP3
Represent.
3rd lens thing side intersection point on optical axis is to the point of inflexion of the 3rd nearest optical axis in lens thing side
Between the horizontal displacement distance parallel with optical axis represent with SGI311, the 3rd lens image side surface is on optical axis
Intersection point to horizontal displacement parallel with optical axis between the point of inflexion of the 3rd nearest optical axis of lens image side surface away from
Representing from SGI321, it meets following condition: SGI321=0.01218mm；
| SGI321 |/(| SGI321 |+TP3)=0.03902.
The point of inflexion of the 3rd nearest optical axis in lens thing side represents with HIF311 with the vertical dimension of light between centers,
3rd lens image side surface intersection point on optical axis is to the point of inflexion of the 3rd nearest optical axis of lens image side surface and light
The vertical dimension of between centers represents with HIF321, and it meets following condition: HIF321=0.84373mm；
HIF321/HOI=0.27864.
4th lens 140 have positive refractive power, and are plastic cement material, and its thing side 142 is convex surface, its
Image side surface 144 is convex surface, and is aspheric surface, and its image side surface 144 has the point of inflexion.4th lens
Thickness on optical axis is TP4, the 4th lens 1/2 entrance pupil diameter (HEP) height thickness with ETP4
Represent.
4th lens thing side intersection point on optical axis is to the point of inflexion of the 4th nearest optical axis in lens thing side
Between the horizontal displacement distance parallel with optical axis represent with SGI411, the 4th lens image side surface is on optical axis
Intersection point to horizontal displacement parallel with optical axis between the point of inflexion of the 4th nearest optical axis of lens image side surface away from
Representing from SGI421, it meets following condition: SGI411=0mm；SGI421=-0.41627mm；
| SGI411 |/(| SGI411 |+TP4)=0；| SGI421 |/(| SGI421 |+TP4)=0.25015.
Anti-to the 4th lens thing side second close to optical axis of 4th lens thing side intersection point on optical axis
Between bent point, the horizontal displacement distance parallel with optical axis represents with SGI412, and it meets following condition:
SGI412=0mm；| SGI412 |/(| SGI412 |+TP4)=0.
The point of inflexion of the 4th nearest optical axis in lens thing side represents with HIF411 with the vertical dimension of light between centers,
The point of inflexion of the 4th nearest optical axis of lens image side surface represents with HIF411 with the vertical dimension of light between centers, its
Meet following condition: HIF411=0mm；HIF421=1.55079mm；HIF411/HOI=0；
HIF421/HOI=0.51215.
The point of inflexion of the 4th lens thing side the second dipped beam axle and the vertical dimension of light between centers are with HIF412 table
Showing, it meets following condition: HIF412=0mm；HIF412/HOI=0.
On first lens thing side, the coordinate points at 1/2HEP height is parallel to optical axis between this imaging surface
Distance is ETL, on the first lens thing side 1/2HEP height coordinate points to the 4th lens image side
The horizontal range being parallel to optical axis on face between the coordinate points of 1/2HEP height is EIN, and it meets following
Condition: ETL=18.744mm；EIN=12.339mm；EIN/ETL=0.658.
The present embodiment meets following condition, ETP1=0.949mm；ETP2=2.483mm；ETP3=0.345
mm；ETP4=1.168mm.Summation SETP=4.945mm of aforementioned ETP1 to ETP4.TP1=0.918
mm；TP2=2.500mm；TP3=0.300mm；TP4=1.248mm；Aforementioned TP1's to TP4
Summation STP=4.966mm；SETP/STP=0.996；SETP/EIN=0.4024.
The present embodiment is that control respectively these lens especially are at the thickness (ETP) of 1/2 entrance pupil diameter (HEP) height
And the proportionate relationship (ETP/TP) between the thickness (TP) that these lens belonging to this surface are on optical axis, with in system
Obtaining balance between the property made and correction aberration ability, it meets following condition, ETP1/TP1=1.034；
ETP2/TP2=0.993；ETP3/TP3=1.148；ETP4/TP4=0.936.
The present embodiment is the horizontal range controlling each adjacent two lens at 1/2 entrance pupil diameter (HEP) height,
Length HOS with at optical imaging system " micro " degree, manufacturing and revise between aberration ability three
Obtain balance, particularly control these adjacent two lens 1/2 entrance pupil diameter (HEP) height level away from
Proportionate relationship (ED/IN) between (ED) two lens adjacent with this horizontal range (IN) on optical axis, it is full
Foot row condition, being parallel at 1/2 entrance pupil diameter (HEP) height between the first lens and the second lens
The horizontal range of optical axis is ED12=4.529mm；Between the second lens and the 3rd lens straight at 1/2 entrance pupil
The horizontal range being parallel to optical axis of footpath (HEP) height is ED23=2.735mm；3rd lens and the 4th
Between lens, the horizontal range being parallel to optical axis at 1/2 entrance pupil diameter (HEP) height is ED34=0.131
mm。
First lens and second lens horizontal range on optical axis are IN12=4.571mm, between the two
Ratio is ED12/IN12=0.991.Second lens and the 3rd lens horizontal range on optical axis are
IN23=2.752mm, ratio between the two is ED23/IN23=0.994.3rd lens and the 4th lens
Horizontal range on optical axis is IN34=0.094mm, and ratio between the two is ED34/IN34=1.387.
On 4th lens image side surface, the coordinate points at 1/2HEP height is parallel to optical axis between this imaging surface
Horizontal range is EBL=6.405mm, on the 4th lens image side surface with the intersection point of optical axis to this imaging surface it
Between to be parallel to the horizontal range of optical axis be BL=6.3642mm, under embodiment of the present utility model can meet
Row formula: EBL/BL=1.00641.At the seat of 1/2HEP height on the present embodiment the 4th lens image side surface
Punctuate is EIR=0.065mm to being parallel to the distance of optical axis between infrared filter, the 4th lens picture
On side and the intersection point of optical axis is PIR=0.025 to being parallel to the distance of optical axis between infrared filter
Mm, and meet following equation: EIR/PIR=2.631.
Infrared filter 170 is glass material, and it is arranged between the 4th lens 140 and imaging surface 180
And do not affect the focal length of optical imaging system.
In the optical imaging system of first embodiment, the focal length of optical imaging system is f, optical imagery system
The a diameter of HEP of entrance pupil of system, in optical imaging system, the half at maximum visual angle is HAF, its numerical value
As follows: f=2.6841mm；F/HEP=2.7959；And HAF=70 degree and tan (HAF)=2.7475.
In the optical imaging system of first embodiment, the focal length of the first lens 110 is f1, the 4th lens 140
Focal length be f4, it meets following condition: f1=-5.4534mm；| f/f1 |=0.4922；F4=2.7595mm；
And | f1/f4 |=1.9762.
In the optical imaging system of first embodiment, the focal length of the second lens 120 to the 3rd lens 130 divides
Not Wei f2, f3, it meets following condition: | f2 |+| f3 |=13.2561mm；
| f1 |+| f4 |=8.2129mm and | f2 |+| f3 | > | f1 |+| f4 |.
The ratio of focal distance f p of the focal distance f of optical imaging system and the most a piece of lens with positive refractive power
The ratio of focal distance f n of PPR, the focal distance f of optical imaging system and the most a piece of lens with negative refractive power
NPR, in the optical imaging system of first embodiment, the PPR summation of the lens of all positive refractive powers is
Σ PPR=| f/f2 |+| f/f4 |=1.25394, the NPR summation of the lens of all negative refractive powers is
Σ NPR=| f/f1 |+| f/f2 |=1.21490, Σ PPR/ | Σ NPR |=1.03213.The most also under meeting
Row condition: | f/f1 |=0.49218；| f/f2 |=0.28128；| f/f3 |=0.72273；
| f/f4 |=0.97267.
In the optical imaging system of first embodiment, the first lens thing side 112 to the 4th lens image side surface
Distance between 144 is InTL, and the distance between the first lens thing side 112 to imaging surface 180 is HOS,
Distance between aperture 100 to imaging surface 180 is InS, the effective sensing region pair of image sensing element 190
The half of linea angulata length is HOI, and the distance between the 4th lens image side surface 144 to imaging surface 180 is InB,
It meets following condition: InTL+InB=HOS；HOS=18.74760mm；HOI=3.088mm；
HOS/HOI=6.19141；HOS/f=6.9848；InTL/HOS=0.6605；InS=8.2310mm；With
And InS/HOS=0.4390.
In the optical imaging system of first embodiment, on optical axis, the thickness of the lens of all tool refractive powers is total
With for Σ TP, it meets following condition: Σ TP=4.9656mm；And Σ TP/InTL=0.4010.By
This, when can take into account simultaneously the contrast of system imaging and the yield of lens manufacture and provide suitable after Jiao
Away from other elements accommodating.
In the optical imaging system of first embodiment, the radius of curvature of the first lens thing side 112 is R1,
The radius of curvature of the first lens image side surface 114 is R2, and it meets following condition: | R1/R2 |=9.6100.
Thus, the first lens possesses suitable positive refractive power intensity, it is to avoid spherical aberration increase is overrun.
In the optical imaging system of first embodiment, the radius of curvature of the 4th lens thing side 142 is R7,
The radius of curvature of the 4th lens image side surface 144 is R8, and it meets following condition:
(R7-R8)/(R7+R8)=-35.5932.Thus, be conducive to revising astigmatism produced by optical imaging system.
In the optical imaging system of first embodiment, the focal length summation of the lens of all tool positive refractive powers is
Σ PP, it meets following condition: Σ PP=12.30183mm；And f4/ Σ PP=0.22432.Thus,
Contribute to the positive refractive power suitably distributing the 4th lens 140 to other plus lens, to suppress incident ray row
Enter the generation of the notable aberration of process.
In the optical imaging system of first embodiment, the focal length summation of the lens of all tool negative refractive powers is
Σ NP, it meets following condition: Σ NP=-14.6405mm；And f1/ Σ NP=0.59488.Thus,
Contribute to the negative refractive power suitably distributing the 4th lens to other minus lenses, to suppress incident ray to travel across
The generation of Cheng Xianzhu aberration.
In the optical imaging system of first embodiment, the first lens 110 and the second lens 120 are on optical axis
Spacing distance be IN12, it meets following condition: IN12=4.5709mm；IN12/f=1.70299.
Thus, the aberration improving lens is contributed to improve its performance.
In the optical imaging system of first embodiment, the second lens 120 and the 3rd lens 130 are on optical axis
Spacing distance be IN23, it meets following condition: IN23=2.7524mm；IN23/f=1.02548.
Thus, the aberration improving lens is contributed to improve its performance.
In the optical imaging system of first embodiment, the 3rd lens 130 and the 4th lens 140 are on optical axis
Spacing distance be IN34, it meets following condition: IN34=0.0944mm；IN34/f=0.03517.
Thus, the aberration improving lens is contributed to improve its performance.
In the optical imaging system of first embodiment, the first lens 110 and the second lens 120 are on optical axis
Thickness be respectively TP1 and TP2, it meets following condition: TP1=0.9179mm；TP2=2.5000
mm；TP1/TP2=0.36715 and (TP1+IN12)/TP2=2.19552.Thus, contribute to controlling light
Learn the sensitivity of imaging system manufacture and improve its performance.
In the optical imaging system of first embodiment, the 3rd lens 130 and the 4th lens 140 are on optical axis
Thickness be respectively TP3 and TP4, aforementioned two lens spacing distance on optical axis is IN34, its
Meet following condition: TP3=0.3mm；TP4=1.2478mm；TP3/TP4=0.24043 and
(TP4+IN34)/TP3=4.47393.Thus, contribute to controlling the sensitivity of optical imaging system manufacture also
Reduction system total height.
In the optical imaging system of first embodiment, it meets following condition:
IN23/ (TP2+IN23+TP3)=0.49572.Thus help correction incident illumination traveling process institute the most a little
Produce aberration and reduce system total height.
In the optical imaging system of first embodiment, the 4th lens thing side 142 intersection point on optical axis is extremely
The maximum effective radius position of the 4th lens thing side 142 is InRS41 in the horizontal displacement distance of optical axis,
The 4th lens image side surface 144 intersection point on optical axis is to the maximum effective radius of the 4th lens image side surface 144
Position is InRS42 in the horizontal displacement distance of optical axis, and the 4th lens 140 thickness on optical axis is TP4,
It meets following condition: InRS41=0.2955mm；InRS42=-0.4940mm；
| InRS41 |+| InRS42 |=0.7894mm；| InRS41 |/TP4=0.23679；And
| InRS42 |/TP4=0.39590.Thus be conducive to eyeglass to make and molding, and effectively maintain it small-sized
Change.
In the optical imaging system of the present embodiment, the critical point C41 of the 4th lens thing side 142 and optical axis
Vertical dimension be HVT41, the critical point C42 of the 4th lens image side surface 144 vertical with optical axis away from
From for HVT42, it meets following condition: HVT41=0mm；HVT42=0mm.
The present embodiment optical imaging system its meet following condition: HVT42/HOI=0.
The present embodiment optical imaging system its meet following condition: HVT42/HOS=0.
In the optical imaging system of first embodiment, the abbe number of the first lens is NA1, the second lens
Abbe number be NA2, the abbe number of the 3rd lens is NA3, and the abbe number of the 4th lens is
NA4, it meets following condition: | NA1-NA2 |=0.0351.Thus, optical imaging system is contributed to
The correction of aberration.
In the optical imaging system of first embodiment, optical imaging system knot as time TV distortion be
TDT, tie as time optical distortion be ODT, it meets following condition: TDT=37.4846%；
ODT=-55.3331%.
In the optical imaging system of the present embodiment, it is seen that light optical axis on this imaging surface, 0.3HOI and
0.7HOI tri-is in the modulation conversion contrast rate of transform of a spatial frequency (110cycles/mm) of four points
(MTF numerical value) represents with MTFQ0, MTFQ3 and MTFQ7 respectively, and it meets following condition:
MTFQ0 is about 0.65；MTFQ3 is about 0.52；And MTFQ7 is about 0.42.Visible ray is at this
Optical axis on imaging surface, 0.3HOI and 0.7HOI tri-are in the modulation of spatial frequency 55cycles/mm
The conversion contrast rate of transform (MTF numerical value) represents with MTFE0, MTFE3 and MTFE7 respectively, its
Meet following condition: MTFE0 is about 0.84；MTFE3 is about 0.76；And MTFE7 is about 0.69.
In the optical imaging system of the present embodiment, infrared ray operation wavelength 850nm is when focusing on imaging surface
On, image optical axis on this imaging surface, 0.3HOI and 0.7HOI tri-are in spatial frequency (55
Cycles/mm) the modulation conversion contrast rate of transform (MTF numerical value) respectively with MTFI0, MTFI3 and
MTFI7 represents, it meets following condition: MTFI0 is about 0.83；MTFI3 is about 0.79；And
MTFI7 is about 0.65.
Refer to Fig. 1 D, be that the optical imaging system representing the present embodiment optical imaging system is at imaging surface
The numerical value figure of the relative illumination of upper each visual field, optical axis (0.0 visual field), 0.1 visual field, 0.2 visual field, 0.3 regards
Field, 0.4 visual field, 0.5 visual field, 0.6 visual field, 0.7 visual field, 0.8 visual field, 0.9 visual field, 1.0 visual fields
Relative illumination respectively with RI1, RI2, RI3, RI4, RI5, RI6, RI7, RI8, RI9, RI10
Representing, wherein the relative illumination RI9 of 0.9 visual field is about 80%.
Refer to Fig. 7, the optical imaging system of the present embodiment can include image sensing module (not shown),
This image sensing module includes a substrate and arranges photo-sensitive cell on the substrate；Optical imagery system
System additionally can include the first lens orientation element 710, this first lens orientation element, include base with
And microscope base；This base has open accommodation space, and setting makes this photo-sensitive cell be positioned on the substrate
In this accommodation space；This microscope base (optional employing is made into integration) in hollow and does not have light transmission, and should
Microscope base has the cylinder portion 7141 and base portion 7142 being interconnected, and this microscope base is at contrary two ends respectively
Having one first perforation 7143 and one second perforation 7144, this first perforation connects this portion and is somebody's turn to do
Second perforation connects this base portion.The maximum of the minimum length of side that this base portion is perpendicular in the plane of optical axis with
PhiD represents, it meets PhiD=3.3mm.
The optical imaging system of the present embodiment also includes the second lens orientation element 720, and this second eyeglass is fixed
Bit unit is contained in the microscope base of this first lens orientation element, and includes location division 722 and connect
Portion 724.This location division is hollow, and the most contrary two ends are respectively provided with the 3rd perforation 7241
And the 4th perforation 7242, the 3rd this location division of perforation 7241 connection 722 and the 4th perforation 7242
Connecting this base portion 7142, this location division 722 directly contacts the arbitrary eyeglass of the present embodiment and produces this mirror accommodating
Sheet and arrange this eyeglass locating effect on optical axis.This connecting portion 724 is to be arranged on this location division
The outside of 722, can be directly combined to this portion 7141 and make this second lens orientation element 720 to produce
It is contained in the microscope base of this first lens orientation element and makes optical imaging system possess at optical axis direction
The function of adjusting focal length and location.The maximum outside diameter that this connecting portion is perpendicular in the plane of optical axis is with PhiC
Representing, it meets PhiC=2.85mm.The maximum inner diameter aperture of the 4th perforation 7242 is then with Phi4
Represent.Aforementioned connecting portion 724 there is thread and make this second lens orientation element 720 be screwed together in this first
In the microscope base of lens orientation element.
The arbitrary eyeglass of the present embodiment is arranged on this first mirror indirectly by this second lens orientation element 720
In sheet setting element 710 and relatively this photo-sensitive cell is close to the 3rd perforation 7241, and just to this photo-sensitive cell.
The present embodiment is the 4th lens 140 closest to the lens of imaging surface, and the maximum of its image side surface is the most straight
Footpath represents with PhiA4, and it meets conditional PhiA4=2 times EHD42=1.767mm, and this surface is non-
Sphere, then the cut-off point of maximum effective diameter is containing aspheric cut-off point.4th lens 140 picture
Invalid radius (the Ineffective Half Diameter of side；IHD) refer to towards extending from away from optical axis direction
The surface segment of the cut-off point of the maximum effective radius on same surface.Saturating closest to imaging surface of the present embodiment
Mirror is the 4th lens 140, and the maximum gauge of its image side surface represents with PhiB, and it meets conditional PhiB=2
(the maximum invalid radius IHD of maximum effective radius EHD42+)=PhiA4+2 times of (maximum invalid radius again
IHD)=2.167mm；PhiA4/2HOI=0.2861.
The present embodiment, closest to the maximum effective diameter of the lens image side surface of imaging surface (i.e. image space), again may be used
Be called optics emergent pupil, it represents with PhiA4, and its pupil is put and represented than with PMR, and it meets conditional
For PMR=PhiA4/HEP=1.84337；Its pupil picture represents than with PMMR, and it meets conditional and is
PMMR=PhiA4/ImgH=0.58355；Its micro represents than with PSMR, and it meets conditional and is
PSMR=PhiA4/InTL=0.14269.
Coordinate again with reference to lower list one and table two.
Table two, the asphericity coefficient of first embodiment
Table one is the structured data that the 1st figure first embodiment is detailed, wherein radius of curvature, thickness, distance
And the unit of focal length is mm, and surface 0-14 represents successively by the surface of thing side to image side.Table two is
Aspherical surface data in one embodiment, wherein, the conical surface coefficient in k table aspheric curve equation,
A1-A20 then represents 1-20 rank, each surface asphericity coefficient.Additionally, following embodiment form is right
Should schematic diagram and the aberration curve figure of each embodiment, in form the definition of data all with the table of first embodiment
One and the definition of table two identical, be not added with at this repeating.
Second embodiment
Refer to Fig. 2 A and Fig. 2 B, wherein Fig. 2 A represents according to this utility model the second embodiment
Planting the schematic diagram of optical imaging system, Fig. 2 B is followed successively by the optical imagery system of the second embodiment from left to right
Spherical aberration, astigmatism and the optical distortion curve chart of system.Fig. 2 C is that the visible light spectrum representing the present embodiment is adjusted
Converting characteristic figure processed.Fig. 2 D is that the light representing this utility model the second embodiment optical imaging system studies
As system numerical value figure of the relative illumination of each visual field on imaging surface.From Fig. 2 A, optical imagery system
System 20 is included the first lens 210, aperture the 200, second lens the 220, the 3rd successively by thing side to image side
Lens the 230, the 4th lens 240, infrared filter 270, imaging surface 280 and image sensing element
290。
First lens 210 have negative refractive power, and are plastic cement material, and its thing side 212 is convex surface, its
Image side surface 214 is concave surface, and is aspheric surface, and its thing side 212 and image side surface 214 are respectively provided with
The point of inflexion.
Second lens 220 have positive refractive power, and are plastic cement material, and its thing side 222 is convex surface, its
Image side surface 224 is convex surface, and is aspheric surface, and its thing side 222 has the point of inflexion.
3rd lens 230 have negative refractive power, and are plastic cement material, and its thing side 232 is concave surface, its
Image side surface 234 is convex surface, and is aspheric surface, and its thing side 232 and image side surface 234 are respectively provided with
The point of inflexion.
4th lens 240 have positive refractive power, and are plastic cement material, and its thing side 242 is convex surface, its
Image side surface 244 is concave surface, and is aspheric surface, and its thing side 242 and image side surface 244 are respectively provided with
The point of inflexion.
Infrared filter 270 is glass material, and it is arranged between the 4th lens 240 and imaging surface 280
And do not affect the focal length of optical imaging system.
In the optical imaging system of the second embodiment, the second lens, the 4th lens are plus lens, its
Other focal length is respectively f2 and f4, and the focal length summation of the lens of all tool positive refractive powers is Σ PP, and it is full
Foot row condition: Σ PP=f2+f4.Thus, contribute to suitably distributing the positive refractive power of single lens to it
His plus lens, to suppress the generation of the notable aberration of incident illumination traveling process.
In the optical imaging system of the second embodiment, the focal length summation of the lens of all tool negative refractive powers is
Σ NP, it meets following condition: Σ NP=f1+f3.
Please coordinate with reference to lower list three and table four.
The asphericity coefficient of table the four, second embodiment
In second embodiment, aspheric fitting equation represents the form such as first embodiment.Additionally,
The definition of following table parameter is all identical with first embodiment, and not in this to go forth.
Following condition formulae numerical value is can get according to table three and table four:
Following condition formulae numerical value is can get according to table three and table four:
3rd embodiment
Refer to Fig. 3 A and Fig. 3 B, wherein Fig. 3 A represents according to this utility model the 3rd embodiment
Planting the schematic diagram of optical imaging system, Fig. 3 B is followed successively by the optical imagery system of the 3rd embodiment from left to right
Spherical aberration, astigmatism and the optical distortion curve chart of system.Fig. 3 C is that the visible light spectrum representing the present embodiment is adjusted
Converting characteristic figure processed.Fig. 3 D is that the light representing this utility model the 3rd embodiment optical imaging system studies
As system numerical value figure of the relative illumination of each visual field on imaging surface.From Fig. 3 A, optical imagery system
System 30 is included the first lens 310, aperture the 300, second lens the 320, the 3rd successively by thing side to image side
Lens the 330, the 4th lens 340, infrared filter 370, imaging surface 380 and image sensing element
390。
First lens 310 have negative refractive power, and are plastic cement material, and its thing side 312 is convex surface, its
Image side surface 314 is concave surface, and is aspheric surface, and its thing side 312 and image side surface 314 are respectively provided with instead
Qu Dian.
Second lens 320 have positive refractive power, and are plastic cement material, and its thing side 322 is convex surface, its
Image side surface 324 is convex surface, and is aspheric surface, and its thing side 322 has the point of inflexion.
3rd lens 330 have negative refractive power, and are plastic cement material, and its thing side 332 is concave surface, its
Image side surface 334 is convex surface, and is aspheric surface, and its thing side 332 and image side surface 334 are respectively provided with instead
Qu Dian.
4th lens 340 have positive refractive power, and are plastic cement material, and its thing side 342 is convex surface, its
Image side surface 344 is concave surface, and is aspheric surface, and its thing side 342 and image side surface 344 are respectively provided with
The point of inflexion.
Infrared filter 370 is glass material, and it is arranged between the 4th lens 340 and imaging surface 380
And do not affect the focal length of optical imaging system.
In the optical imaging system of the 3rd embodiment, the second lens, the 4th lens are plus lens, its
Other focal length is respectively f2 and f4, and the focal length summation of the lens of all tool positive refractive powers is Σ PP, and it is full
Foot row condition: Σ PP=f2+f4.Thus, contribute to suitably distributing the positive refractive power of single lens to it
His plus lens, to suppress the generation of the notable aberration of incident illumination traveling process.
In the optical imaging system of the 3rd embodiment, indivedual focal lengths of the first lens and the 3rd lens are respectively
F1 and f3, the focal length summation of the lens of all tool negative refractive powers is Σ NP, and it meets following condition:
Σ NP=f1+f3.Thus, the negative refractive power suitably distributing single lens is contributed to other minus lenses.
Please coordinate with reference to lower list five and table six.
The asphericity coefficient of table the six, the 3rd embodiment
In 3rd embodiment, aspheric fitting equation represents the form such as first embodiment.Additionally,
The definition of following table parameter is all identical with first embodiment, and not in this to go forth.
Following condition formulae numerical value is can get according to table five and table six:
Following condition formulae numerical value is can get according to table five and table six:
4th embodiment
Refer to Fig. 4 A and Fig. 4 B, wherein Fig. 4 A represents according to this utility model the 4th embodiment
Planting the schematic diagram of optical imaging system, Fig. 4 B is followed successively by the optical imagery system of the 4th embodiment from left to right
Spherical aberration, astigmatism and the optical distortion curve chart of system.Fig. 4 C is that the visible light spectrum representing the present embodiment is adjusted
Converting characteristic figure processed.Fig. 4 D is that the light representing this utility model the 4th embodiment optical imaging system studies
As system numerical value figure of the relative illumination of each visual field on imaging surface.From Fig. 4 A, optical imagery system
System 40 is included the first lens 410, aperture the 400, second lens the 420, the 3rd successively by thing side to image side
Lens the 430, the 4th lens 440, infrared filter 470, imaging surface 480 and image sensing element
490。
First lens 410 have positive refractive power, and are plastic cement material, and its thing side 412 is concave surface, its
Image side surface 414 is convex surface, and is aspheric surface.
Second lens 420 have positive refractive power, and are plastic cement material, and its thing side 422 is convex surface, its
Image side surface 424 is convex surface, and is aspheric surface, and its thing side 422 and image side surface 424 are respectively provided with
The point of inflexion.
3rd lens 430 have negative refractive power, and are plastic cement material, and its thing side 432 is concave surface, its
Image side surface 434 is convex surface, and is aspheric surface, and its thing side 432 and image side surface 434 are respectively provided with
The point of inflexion.
4th lens 440 have positive refractive power, and are plastic cement material, and its thing side 442 is convex surface, its
Image side surface 444 is concave surface, and is aspheric surface, and its thing side 442 and image side surface 444 are respectively provided with
The point of inflexion.
Infrared filter 470 is glass material, and it is arranged between the 4th lens 440 and imaging surface 480
And do not affect the focal length of optical imaging system.
In the optical imaging system of the 4th embodiment, the first lens, the second lens and the 3rd lens are just
Lens, its indivedual focal lengths are respectively f1, f2 and f3, the focal length summation of the lens of all tool positive refractive powers
For Σ PP, it meets following condition: Σ PP=f1+f2+f3.Thus, contribute to suitably distributing single lens
Positive refractive power to other plus lens, to suppress the generation of the notable aberration of incident illumination traveling process.
In the optical imaging system of the 4th embodiment, indivedual focal lengths of the 4th lens are respectively f4, all tools
The focal length summation of the lens of negative refractive power is Σ NP, and it meets following condition: Σ NP=f4.
Please coordinate with reference to lower list seven and table eight.
The asphericity coefficient of table the eight, the 4th embodiment
In 4th embodiment, aspheric fitting equation represents the form such as first embodiment.Additionally,
The definition of following table parameter is all identical with first embodiment, and not in this to go forth.
Following condition formulae numerical value is can get according to table seven and table eight:
Following condition formulae numerical value is can get according to table seven and table eight:
5th embodiment
Refer to Fig. 5 A and Fig. 5 B, wherein Fig. 5 A represents according to this utility model the 5th embodiment
Planting the schematic diagram of optical imaging system, Fig. 5 B is followed successively by the optical imagery system of the 5th embodiment from left to right
Spherical aberration, astigmatism and the optical distortion curve chart of system.Fig. 5 C is that the visible light spectrum representing the present embodiment is adjusted
Converting characteristic figure processed.Fig. 5 D is that the light representing this utility model the 5th embodiment optical imaging system studies
As system numerical value figure of the relative illumination of each visual field on imaging surface.From Fig. 5 A, optical imagery system
System 50 is included the first lens 510, aperture the 500, second lens the 520, the 3rd successively by thing side to image side
Lens the 530, the 4th lens 540, infrared filter 570, imaging surface 580 and image sensing element
590。
First lens 510 have positive refractive power, and are plastic cement material, and its thing side 512 is concave surface, its
Image side surface 514 is convex surface, and is aspheric surface.
Second lens 520 have positive refractive power, and are plastic cement material, and its thing side 522 is convex surface, its
Image side surface 524 is convex surface, and is aspheric surface, and its thing side 522 has the point of inflexion.
3rd lens 530 have negative refractive power, and are plastic cement material, and its thing side 532 is concave surface, its
Image side surface 534 is convex surface, and is aspheric surface, and its thing side 532 and image side surface 534 are respectively provided with
The point of inflexion.
4th lens 540 have positive refractive power, and are plastic cement material, and its thing side 542 is convex surface, its
Image side surface 544 is concave surface, and is aspheric surface, and its thing side 542 and image side surface 544 are respectively provided with
The point of inflexion.
Infrared filter 570 is glass material, and it is arranged between the 4th lens 540 and imaging surface 580
And do not affect the focal length of optical imaging system.
In the optical imaging system of the 5th embodiment, the first lens, the second lens, the 4th lens are just
Lens, its indivedual focal lengths are respectively f1, f2 and f4, the focal length summation of the lens of all tool positive refractive powers
For Σ PP, it meets following condition: Σ PP=f1+f2+f4.Thus, contribute to suitably distributing single lens
Positive refractive power to other plus lens, to suppress the generation of the notable aberration of incident illumination traveling process.
In the optical imaging system of the 5th embodiment, the focal length summation of the lens of all tool negative refractive powers is
Σ NP, it meets following condition: Σ NP=f3.
Please coordinate with reference to lower list nine and table ten.
The asphericity coefficient of table the ten, the 5th embodiment
In 5th embodiment, aspheric fitting equation represents the form such as first embodiment.Additionally,
The definition of following table parameter is all identical with first embodiment, and not in this to go forth.
Following condition formulae numerical value is can get according to table nine and table ten:
Following condition formulae numerical value is can get according to table nine and table ten:
Sixth embodiment
Refer to Fig. 6 A and Fig. 6 B, wherein Fig. 6 A represents according to this utility model sixth embodiment
Planting the schematic diagram of optical imaging system, Fig. 6 B is followed successively by the optical imagery system of sixth embodiment from left to right
Spherical aberration, astigmatism and the optical distortion curve chart of system.Fig. 6 C is that the visible light spectrum representing the present embodiment is adjusted
Converting characteristic figure processed.Fig. 6 D is that the light representing this utility model sixth embodiment optical imaging system studies
As system numerical value figure of the relative illumination of each visual field on imaging surface.From Fig. 6 A, optical imagery system
System 60 is included aperture the 600, first lens the 610, second lens the 620, the 3rd successively by thing side to image side
Lens the 630, the 4th lens 640, infrared filter 670, imaging surface 680 and image sensing element
690。
First lens 610 have positive refractive power, and are plastic cement material, and its thing side 612 is convex surface, its
Image side surface 614 is convex surface, and is aspheric surface, and its thing side 612 has the point of inflexion.
Second lens 620 have positive refractive power, and are plastic cement material, and its thing side 622 is concave surface, its
Image side surface 624 is convex surface, and is aspheric surface, and its thing side 622 and image side surface 624 are respectively provided with
The point of inflexion.
3rd lens 630 have negative refractive power, and are plastic cement material, and its thing side 632 is concave surface, its
Image side surface 634 is convex surface, and is aspheric surface, and its thing side 632 has the point of inflexion.
4th lens 640 have negative refractive power, and are plastic cement material, and its thing side 642 is convex surface, its
Image side surface 644 is concave surface, and is aspheric surface, and its thing side 642 and image side surface 644 are respectively provided with
The point of inflexion.
Infrared filter 670 is glass material, and it is arranged between the 4th lens 640 and imaging surface 680
And do not affect the focal length of optical imaging system.
In the optical imaging system of sixth embodiment, the first lens, the second lens are plus lens, its
Other focal length is respectively f1 and f2, and the focal length summation of the lens of all tool positive refractive powers is Σ PP, and it is full
Foot row condition: Σ PP=f1+f2.Thus, contribute to suitably distributing the positive refractive power of single lens to it
His plus lens, to suppress the generation of the notable aberration of incident illumination traveling process.
In the optical imaging system of sixth embodiment, the focal length summation of the lens of all tool negative refractive powers is
Σ NP, it meets following condition: Σ NP=f3+f4.Thus, contribute to suitably distributing the negative of single lens
Refractive power is to other minus lenses.
Please coordinate with reference to lower list 11 and table 12.
Table 12, the asphericity coefficient of sixth embodiment
In sixth embodiment, aspheric fitting equation represents the form such as first embodiment.Additionally,
The definition of following table parameter is all identical with first embodiment, and not in this to go forth.
Following condition formulae numerical value is can get according to table 11 and table 12:
Following condition formulae numerical value is can get according to table 11 and table 12:
Although with embodiment disclosure as above, so it is not limited to this utility model to this utility model,
Any those skilled in the art, without departing from spirit and scope of the present utility model, various when making
Change and retouching, but all in protection domain of the present utility model.
Although this utility model is particularly shown with reference to its exemplary embodiments and describes, will be for ability
Field technique personnel will be understood by, without departing from this reality defined in this utility model scope and equivalent thereof
It can be carried out form and the various changes in details with under novel spirit and scope.
Claims (25)
1. an optical imaging system, it is characterised in that included successively to image side by thing side:
First lens, have refractive power；
Second lens, have refractive power；
3rd lens, have refractive power；
4th lens, have refractive power；And
Imaging surface, it is four pieces and described first saturating that wherein said optical imaging system has the lens of refractive power
Mirror has at least one point of inflexion at least one surface of at least one lens in described 4th lens, institute
State the first lens at least one lens in described 4th lens and there is positive refractive power, and described 4th saturating
The thing side surface of mirror and surface, image side are aspheric surface, and the focal length of described optical imaging system is f, described
The intersection point of a diameter of HEP of entrance pupil of optical imaging system, described first lens thing side and optical axis is to institute
Stating and have distance HOS between the intersection point of imaging surface and optical axis on optical axis, described first lens thing side is to institute
Stating the 4th lens image side surface and have distance InTL on optical axis, the maximum of described 4th lens image side surface has
Imitate a diameter of PhiA4, described first lens, described second lens, described 3rd lens and described
Four lens 1/2HEP height and be parallel to the thickness of optical axis be respectively ETP1, ETP2, ETP3 and
ETP4, the summation of aforementioned ETP1 to ETP4 is SETP, described first lens, described second lens,
Described 3rd lens and described 4th lens the thickness of optical axis be respectively TP1, TP2, TP3 and
TP4, the summation of aforementioned TP1 to TP4 is STP, and it meets following condition: 1.0≤f/HEP≤10；
0.5≤HOS/f≤20,0 < PhiA4/InTL≤1.4；And 0.5≤SETP/STP < 1.
2. optical imaging system as claimed in claim 1, it is characterised in that described first lens thing
The horizontal range being parallel to optical axis on side between the coordinate points extremely described imaging surface of 1/2HEP height is
ETL, in the coordinate points extremely described 4th lens image side of 1/2HEP height on described first lens thing side
The horizontal range being parallel to optical axis on face between the coordinate points of 1/2HEP height is EIN, and it meets following
Condition: 0.2≤EIN/ETL < 1.
3. optical imaging system as claimed in claim 1, it is characterised in that described first lens exist
1/2HEP height and to be parallel to the thickness of optical axis be ETP1, described second lens at 1/2HEP height and
The thickness being parallel to optical axis is ETP2, and described 3rd lens are at 1/2HEP height and are parallel to the thickness of optical axis
Degree is for ETP3, and described 4th lens are at 1/2HEP height and to be parallel to the thickness of optical axis be ETP4, front
The summation stating ETP1 to ETP4 is SETP, at 1/2HEP height on described first lens thing side
Between the coordinate points of 1/2HEP height, the water of optical axis it is parallel on coordinate points extremely described 4th lens image side surface
Flat distance is EIN, and it meets following equation: 0.3≤SETP/EIN≤0.8.
4. optical imaging system as claimed in claim 1, it is characterised in that described optical imagery system
System include filter element, described filter element between described 4th lens and described imaging surface, institute
State and between the coordinate points extremely described filter element of 1/2HEP height, be parallel to optical axis on the 4th lens image side surface
Distance be EIR, with the intersection point of optical axis to parallel between described filter element on described 4th lens image side surface
Distance in optical axis is PIR, and it meets following equation: 0.2≤EIR/PIR≤5.0.
5. optical imaging system as claimed in claim 1, it is characterised in that visible light spectrum is in institute
State and be perpendicular to optical axis on imaging surface there is maximum image height HOI, optical axis on described imaging surface,
0.3HOI and 0.7HOI tri-is in the modulation conversion contrast rate of transform of spatial frequency 110cycles/mm
(MTF numerical value) represents with MTFQ0, MTFQ3 and MTFQ7 respectively, and it meets following condition:
MTFQ0≧0.3；MTFQ3≧0.2；And MTFQ7 0.01.
6. optical imaging system as claimed in claim 1, it is characterised in that described 4th lens picture
The horizontal range being parallel to optical axis on side between the coordinate points extremely described imaging surface of 1/2HEP height is
EBL, described 4th lens image side surface is parallel to the level of optical axis with the intersection point of optical axis to described imaging surface
Distance is BL, and it meets: 0.2≤EBL/BL≤1.1.
7. optical imaging system as claimed in claim 1, it is characterised in that described optical imagery system
Unite and meet following condition: 0 < PhiA4/HEP≤4.0.
8. optical imaging system as claimed in claim 1, it is characterised in that described optical imagery system
System is perpendicular to optical axis on described imaging surface and has maximum image height HOI, and it meets following equation:
0<PhiA4/2HOI≤2.0。
9. optical imaging system as claimed in claim 1, it is characterised in that also include aperture,
On described optical axis, described aperture to described imaging surface has distance InS, and described optical imaging system is provided with figure
As sensing element is at described imaging surface, its described optical imaging system is perpendicular to optical axis on described imaging surface
There is maximum image height HOI, meet following relationship: 0.2≤InS/HOS≤1.1；And
0.5<HOS/HOI≤15。
10. an optical imaging system, it is characterised in that included successively to image side by thing side:
First lens, have refractive power；
Second lens, have refractive power；
3rd lens, have refractive power；
4th lens, have refractive power；
Imaging surface；And
First lens orientation element, it includes microscope base, and described microscope base is hollow and does not have light transmission,
And described microscope base has the cylinder portion and base portion being interconnected, cartridge is in order to accommodating described first lens
To described 4th lens, described base portion is between described 4th lens and described imaging surface, and institute
Stating the outer peripheral edge more than cartridge, the outer peripheral edge of base portion, described base portion is perpendicular in the plane of optical axis
The maximum of the little length of side is PhiD, and it is four pieces that wherein said optical imaging system has the lens of refractive power
And described first lens have at least at least one surface of at least one lens in described 4th lens
One point of inflexion, in described first lens to described 4th lens, at least one lens has positive refractive power,
The focal length of described optical imaging system is f, a diameter of HEP of entrance pupil of described optical imaging system, institute
Have on optical axis between the intersection point of intersection point extremely described imaging surface and the optical axis of stating the first lens thing side and optical axis
Having distance HOS, the half at the maximum visual angle of described optical imaging system is HAF, described 4th lens
The maximum effective diameter of image side surface is PhiA4, at 1/2HEP height on described first lens thing side
The horizontal range being parallel to optical axis between coordinate points extremely described imaging surface is ETL, described first lens thing side
On 1/2HEP height coordinate points on described 4th lens image side surface at the coordinate of 1/2HEP height
The horizontal range being parallel to optical axis between point is EIN, and it meets following condition: 1.0≤f/HEP≤10；
0.5≤HOS/f≤20；0.4≤∣tan(HAF)│≤6.0；0mm<PhiD≤4.0mm；0.2≤EIN/ETL<1.
11. optical imaging systems as claimed in claim 10, it is characterised in that described 3rd lens
At 1/2HEP height on the coordinate points extremely described 4th lens thing side of 1/2HEP height on image side surface
Coordinate points between to be parallel to the horizontal range of optical axis be ED34, described 3rd lens and described 4th lens
Between distance on optical axis be IN34, it meets following condition: 0.5≤ED34/IN34≤10.
12. optical imaging systems as claimed in claim 10, it is characterised in that described second lens
At 1/2HEP height on the coordinate points extremely described 3rd lens thing side of 1/2HEP height on image side surface
Coordinate points between to be parallel to the horizontal range of optical axis be ED23, described first lens and described second lens
Between distance on optical axis be IN23, it meets following condition: 0.1≤ED23/IN23≤5.
13. optical imaging systems as claimed in claim 10, it is characterised in that described first lens
At 1/2HEP height on the coordinate points extremely described second lens thing side of 1/2HEP height on image side surface
Coordinate points between to be parallel to the horizontal range of optical axis be ED12, described first lens and described second lens
Between distance on optical axis be IN12, it meets following condition: 0.1≤ED12/IN12≤5.
14. optical imaging systems as claimed in claim 10, it is characterised in that described 4th lens
At 1/2HEP height and to be parallel to the thickness of optical axis be ETP4, described 4th lens thickness on optical axis
For TP4, it meets following condition: 0.5≤ETP4/TP4≤3.0.
15. optical imaging systems as claimed in claim 10, it is characterised in that described optical imagery
System meets following condition: 0 < PhiA4/HEP≤4.0.
16. optical imaging systems as claimed in claim 10, it is characterised in that described optical imagery
System is perpendicular to optical axis on described imaging surface and has maximum image height HOI, and it meets following equation:
0<PhiA4/2HOI≤2.0。
17. optical imaging systems as claimed in claim 10, it is characterised in that described optical imagery
System meets following condition: 0mm < PhiA4≤1.8mm.
18. optical imaging systems as claimed in claim 10, it is characterised in that described first lens
And between described second lens, the distance on optical axis is IN12, and meets following equation: 0 < IN12/f≤5.0.
19. optical imaging systems as claimed in claim 10, it is characterised in that described first lens,
In described second lens, described 3rd lens and described 4th lens, at least one lens is that wavelength is less than
The light of 500nm filters element.
20. 1 kinds of optical imaging systems, it is characterised in that included successively to image side by thing side:
First lens, have refractive power；
Second lens, have refractive power；
3rd lens, have refractive power；
4th lens, have refractive power；
Imaging surface；
First lens orientation element, it includes microscope base, and described microscope base is hollow and does not have light transmission,
And described microscope base has the cylinder portion and base portion being interconnected, cartridge is in order to accommodating described first lens
To described 4th lens, described base portion position is between described 4th lens and described imaging surface, and institute
Stating the outer peripheral edge more than cartridge, the outer peripheral edge of base portion, described base portion is perpendicular in the plane of optical axis
The maximum of the little length of side is PhiD；And
Second lens orientation element, it is contained in described microscope base, and includes location division and connecting portion,
Described location division is hollow, and the directly contact of described location division system also houses arbitrary lens, makes described first saturating
Mirror is to described 4th lens arrangement on optical axis, and described connecting portion system is arranged at the outside of described location division also
Directly contact cartridge inner peripheral, the maximum outside diameter that described connecting portion is perpendicular in the plane of optical axis is
PhiC, it is that four pieces and described first lens are to institute that wherein said optical imaging system has the lens of refractive power
State at least one surface of at least one lens in the 4th lens and there is at least one point of inflexion, described first
Lens have positive refractive power, Jiao of described optical imaging system at least one lens in described 4th lens
Away from for f, a diameter of HEP of entrance pupil of described optical imaging system, described first lens thing side and light
The intersection point of axle to described imaging surface and optical axis intersection point between there is on optical axis distance HOS, described first saturating
Mirror thing side to described 4th lens image side surface has distance InTL, described optical imagery system on optical axis
The half at the maximum visual angle of system is HAF, and the maximum effective diameter of described 4th lens image side surface is PhiA4,
On described first lens thing side, the coordinate points at 1/2HEP height is parallel to optical axis between described imaging surface
Horizontal range be ETL, in the coordinate points of 1/2HEP height to the most described on described first lens thing side
The horizontal range being parallel to optical axis on 4th lens image side surface between the coordinate points of 1/2HEP height is EIN,
It meets following condition: 1.0≤f/HEP≤10；0.5≤HOS/f≤15；0.4≤∣tan(HAF)│≤6.0；
0<PhiA4/InTL≤1.4；PhiC<PhiD；0mm<PhiD≤4.0mm；0.2≤EIN/ETL<1.
21. optical imaging systems as claimed in claim 20, it is characterised in that it meets following public affairs
Formula: 0 < PhiA4/HEP≤4.0.
22. optical imaging systems as claimed in claim 20, it is characterised in that described optical imagery
System is perpendicular to optical axis on described imaging surface and has maximum image height HOI, and it meets following equation:
0<PhiA4/2HOI≤2.0。
23. optical imaging systems as claimed in claim 20, it is characterised in that described optical imagery
System meets following condition: 0mm < PhiA4≤1.8mm.
24. optical imaging systems as claimed in claim 20, it is characterised in that described system is in institute
State and be perpendicular to optical axis on imaging surface there is maximum image height HOI, described optical imaging system described
Relative illumination at big image height HOI represents with RI, it is seen that optical spectrum light on described imaging surface
Axle, 0.3HOI and 0.7HOI tri-are in the modulation conversion contrast transfer of spatial frequency 55cycles/mm
Rate represents with MTFE0, MTFE3 and MTFE7 respectively, and it meets following condition: MTFE0 0.3；
MTFE3≧0.2；MTFE7 0.1 and 10%≤RI < 100%.
25. optical imaging systems as claimed in claim 20, it is characterised in that described optical imagery
System also includes aperture, image sensing element and drives module, and described image sensing element is arranged on institute
Stating imaging surface, and have distance InS at described aperture to described imaging surface, described driving module can be with
Described first lens to described 4th lens are coupled and make described first lens produce to described 4th lens
Raw displacement, it is satisfied: 0.2≤InS/HOS≤1.1.
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|---|---|---|---|
| TW104220409 | 2015-12-18 | ||
| TW104220409U TWM523105U (en) | 2015-12-18 | 2015-12-18 | Optical image capturing system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106896468A (en) * | 2015-12-18 | 2017-06-27 | 先进光电科技股份有限公司 | Optical imaging system |
| CN107643583A (en) * | 2016-07-21 | 2018-01-30 | 先进光电科技股份有限公司 | Optical imaging system |
| CN109307923A (en) * | 2017-07-26 | 2019-02-05 | 先进光电科技股份有限公司 | Optical imaging system |
| CN110426811A (en) * | 2018-05-01 | 2019-11-08 | 先进光电科技股份有限公司 | Optical imaging system |
| CN110426812A (en) * | 2018-05-01 | 2019-11-08 | 先进光电科技股份有限公司 | Optical imaging system |
| CN110837159A (en) * | 2018-08-16 | 2020-02-25 | 先进光电科技股份有限公司 | Optical imaging module |
-
2015
- 2015-12-18 TW TW104220409U patent/TWM523105U/en unknown
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2016
- 2016-05-31 CN CN201620518140.2U patent/CN205826951U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106896468A (en) * | 2015-12-18 | 2017-06-27 | 先进光电科技股份有限公司 | Optical imaging system |
| CN107643583A (en) * | 2016-07-21 | 2018-01-30 | 先进光电科技股份有限公司 | Optical imaging system |
| CN109307923A (en) * | 2017-07-26 | 2019-02-05 | 先进光电科技股份有限公司 | Optical imaging system |
| CN109307923B (en) * | 2017-07-26 | 2020-11-06 | 先进光电科技股份有限公司 | Optical imaging system |
| CN110426811A (en) * | 2018-05-01 | 2019-11-08 | 先进光电科技股份有限公司 | Optical imaging system |
| CN110426812A (en) * | 2018-05-01 | 2019-11-08 | 先进光电科技股份有限公司 | Optical imaging system |
| CN110426812B (en) * | 2018-05-01 | 2021-08-10 | 先进光电科技股份有限公司 | Optical imaging system |
| CN110426811B (en) * | 2018-05-01 | 2021-08-20 | 先进光电科技股份有限公司 | Optical imaging system |
| CN110837159A (en) * | 2018-08-16 | 2020-02-25 | 先进光电科技股份有限公司 | Optical imaging module |
| CN110837159B (en) * | 2018-08-16 | 2022-01-04 | 先进光电科技股份有限公司 | Optical imaging module |
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