CN206178234U - Low-focal-plane offset optical imaging system for visible light and infrared light - Google Patents
Low-focal-plane offset optical imaging system for visible light and infrared light Download PDFInfo
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- CN206178234U CN206178234U CN201621199588.9U CN201621199588U CN206178234U CN 206178234 U CN206178234 U CN 206178234U CN 201621199588 U CN201621199588 U CN 201621199588U CN 206178234 U CN206178234 U CN 206178234U
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Abstract
The utility model discloses a low focal plane offset optical imaging system of visible light and infrared light dual-purpose. The optical imaging system according to an embodiment of the present disclosure includes, in order from an object side to an image side, first to fourth lenses with refractive power and first and second image planes. At least one of the first to fourth lenses has positive refractive power. The focal length of the optical imaging system is f, the diameter of an entrance pupil is HEP, half of the maximum visual angle is HAF, and the distance between the first imaging surface and the second imaging surface on the optical axis is FS; the thicknesses of the first lens, the second lens, the third lens, the fourth lens and the fourth lens in a 1/2HEP height direction and parallel to the optical axis are respectively ETP 1-ETP 4, the sum of ETP 1-ETP 4 is SETP, the thicknesses of the first lens, the second lens and the fourth lens in the optical axis are respectively TP 1-TP 4, the sum of TP 1-TP 4 is STP, and the following conditions are met: 1 ≦ f/HEP ≦ 10; 0< HAF ≦ 150 deg; 0.5 ≦ SETP/STP <1 and |. FS ≦ 30 μm. The optical imaging system has larger light receiving and better light path adjusting capacity so as to improve the imaging quality.
Description
Technical field
This utility model is related to a kind of optical imaging system, and more particularly to a kind of miniaturization being applied on electronic product
Optical imaging system.
Background technology
In recent years, with the rise of the portable electronic product with camera function, the demand of optical system is day by day improved.
The photo-sensitive cell of general optical system is nothing more than being photosensitive coupling element (Charge Coupled Device；CCD it is) or complementary golden
Category oxide-semiconductor sensor (Complementary Metal-Oxide Semiconductor Sensor；CMOS
Sensor) two kinds, and progressing greatly with semiconductor process technique so that the Pixel Dimensions of photo-sensitive cell reduce, optical system by
Gradually develop toward high pixel neighborhoods, therefore the requirement to image quality also increasingly increases.
Tradition is equipped on the optical system on portable apparatus, more using based on two or three-chip type lens arrangement, but
Due to portable apparatus constantly towards lifting pixel and terminal consumer to the demand such as low-light of large aperture and night shooting function or
It is the Self-timer of for example preposition camera lens of the demand to Radix Rumiciss.The optical system for only designing large aperture often faces the more aberrations of generation
Edge imaging quality is caused to deteriorate and manufacture the situation of difficulty therewith, and the optical system for designing Radix Rumiciss can then face imaging
Aberration rate (distortion) improve, existing optical imaging system cannot meet the photography requirement of higher order.
Therefore, the light-inletting quantity of optical imaging system and the visual angle for increasing optical imaging system how are effectively increased, are removed into one
Step improves the design of weighing and considering in order to uphold justice that can take into account miniaturization optical imaging system outside total pixel and quality of imaging simultaneously, becomes as a phase
When important subject under discussion.
Utility model content
This utility model embodiment proposes a kind of visible ray and the dual-purpose low focal plane side-play amount optical imagery system of infrared light
System, (convex surface described in the utility model or concave surface are essentially can to utilize the combination of refractive power, convex surface and concave surface of four lens
Refer to the geometry description of the thing side or image side surface of each lens on optical axis), and then effectively improve entering for optical imaging system
Light quantity and the visual angle for increasing optical imaging system, are provided simultaneously with certain relative illumination and improve total pixel and quality of imaging,
To be applied on small-sized electronic product.
Additionally, in particular optical imaging applications field, it is in need while for visible ray and the light source of infrared light wavelength
It is imaged, for example IP imaging monitorings camera." day and night function (Day＆Night) " that IP imaging monitoring cameras possess,
Mainly because the visible ray of the mankind is spectrally located at 400-700nm, but the imaging of sensor, the mankind are included invisible infrared
Light, therefore in order to guarantee that sensor finally only remains human eye visible ray, optionally can arrange before camera lens detachable red
Outside line blocks optical filter (IR Cut filter Removable, ICR) to increase " validity " of image, and it can be on daytime
When prevent infrared light, avoid colour cast；Infrared light is then allowed to come in lift brightness when night.However, ICR elements are occupied in itself
Quite volume and expensive, design and the manufacture of unfavorable following miniature monitoring camera.
This utility model embodiment proposes that a kind of visible ray low focal plane side-play amount light dual-purpose with infrared light is studied simultaneously
As system, refractive power, the combination of convex surface and concave surface and the selection of material of four lens can be utilized, make optical imaging system
For the gap between the imaging focal length of visible ray and the imaging focal length of infrared light is reduced, that is, the effect for reaching close " confocal "
Really, therefore without using ICR elements.
In detail row are as follows with its code name for the term of the related lens parameter of this utility model embodiment, used as the ginseng of subsequent descriptions
Examine：
The lens parameter relevant with the amplification of optical imaging system
The visible ray of the present utility model low focal plane side-play amount optical imaging system dual-purpose with infrared light can be designed simultaneously
Biological characteristic identification is applied to, for example, is used in recognition of face.If embodiments of the invention are used as the capturing images of recognition of face,
Can select with infrared light as operation wavelength, simultaneously for the face apart from about 15 centimetres of about 25 to 30 cms and width,
30 horizontal pixels can be at least imaged out in horizontal direction in photo-sensitive cell (Pixel Dimensions are 1.4 microns (μm)).Infrared light
The line amplification of imaging surface is LM, and it meets following condition：LM=(30 horizontal pixels) is multiplied by (1.4 microns of Pixel Dimensions) and removes
With 15 centimetres of subject width；LM≧0.0003.Meanwhile, with visible ray as operation wavelength, simultaneously for distance about 25 to
The face of about 15 centimetres of 30 cms and width, can be in photo-sensitive cell (Pixel Dimensions are 1.4 microns (μm)) in horizontal direction
On be at least imaged out 50 horizontal pixels.
With length or highly relevant lens parameter
This utility model can select wavelength 555nm as main reference wavelength and weighs focal shift in visible light spectrum
Benchmark, can select wavelength 850nm as main reference wavelength and weighs focal shift in infrared optical spectrum (700nm to 1000nm)
Benchmark.
Visible ray has one first imaging surface and with the dual-purpose low focal plane side-play amount optical imaging system of infrared light
Second imaging surface, the first imaging surface is a specific visible ray image plane and its central vision perpendicular to optical axis in the first space
The out of focus modulation conversion contrast rate of transform (MTF) of frequency has maximum；And second imaging surface be one specific perpendicular to optical axis
Infrared light image plane and its central vision have maximum in the out of focus modulation conversion contrast rate of transform (MTF) of the first spatial frequency
Value.Optical imaging system separately has one first average imaging surface and one second average imaging surface, and the first average imaging surface is one
Specific visible ray image plane perpendicular to optical axis and it is arranged at the central vision of the optical imaging system, 0.3 visual field and 0.7 regards
Field each has the mean place of the out of focus position of corresponding maximum mtf value in the first spatial frequency；And the second average imaging
Face is a specific infrared light image plane perpendicular to optical axis and is arranged at the central vision of the optical imaging system, 0.3 visual field
And 0.7 visual field each have in the first spatial frequency corresponding maximum mtf value out of focus position mean place.
Aforementioned first spatial frequency is set as 1/2nd spaces frequency of photo-sensitive cell used in the present invention (detector)
Rate (half frequency), such as pixel size (Pixel Size) is that, containing less than 1.12 microns of photo-sensitive cell, its modulation transfer function is special
Property the quarter spaces frequency of figure, 1/2nd spatial frequencys (half frequency) and complete space frequency (full range) be at least respectively
110cycles/mm (cycle/millimeter), 220cycles/mm and 440cycles/mm.The light of arbitrary visual field can be further
It is divided into sagittal surface light (sagittal ray) and meridional ray (tangential ray).
The visible ray central vision of this utility model optical imaging system, 0.3 visual field, the sagittal surface light of 0.7 visual field
The focus deviation of out of focus MTF maximum represents (linear module with VSFS0, VSFS3, VSFS7 respectively：mm)；It can be seen that light center
Visual field, 0.3 visual field, the out of focus MTF maximum of the sagittal surface light of 0.7 visual field are respectively with VSMTF0, VSMTF3, VSMTF7 table
Show；Visible ray central vision, 0.3 visual field, the focus deviation difference of the out of focus MTF maximum of the meridional ray of 0.7 visual field
(linear module is represented with VTFS0, VTFS3, VTFS7：mm)；Visible ray central vision, 0.3 visual field, the meridian plane light of 0.7 visual field
The out of focus MTF maximum of line is represented respectively with VTMTF0, VTMTF3, VTMTF7.The aforementioned visual field of visible ray sagittal surface three and can
The average focus deviation (position) for seeing the focus deviation of the visual field of light meridian plane three represents (linear module with AVFS：Mm), its
Meet absolute value │ (VSFS0+VSFS3+VSFS7+VTFS0+VTFS3+VTFS7)/6 │.
The infrared light central vision of this utility model optical imaging system, 0.3 visual field, the sagittal surface light of 0.7 visual field
The focus deviation of out of focus MTF maximum represents that respectively the focus of the visual field of aforementioned sagittal surface three is inclined with ISFS0, ISFS3, ISFS7
The average focus deviation (position) of shifting amount represents (linear module with AISFS：mm)；Infrared light central vision, 0.3 visual field, 0.7
The out of focus MTF maximum of the sagittal surface light of visual field is represented respectively with ISMTF0, ISMTF3, ISMTF7；Infrared light central vision,
0.3 visual field, the focus deviation of the out of focus MTF maximum of the meridional ray of 0.7 visual field are respectively with ITFS0, ITFS3, ITFS7
Represent (linear module：Mm), the average focus deviation (position) of the focus deviation of the visual field of aforementioned meridian plane three is with AITFS tables
Show (linear module：mm)；Infrared light central vision, 0.3 visual field, the out of focus MTF maximum difference of the meridional ray of 0.7 visual field
Represented with ITMTF0, ITMTF3, ITMTF7.The aforementioned visual field of infrared light sagittal surface three and the focus of the visual field of infrared light meridian plane three
The average focus deviation (position) of side-play amount represents (linear module with AIFS：Mm), it meets absolute value │ (ISFS0+ISFS3
+ISFS7+ITFS0+ITFS3+ITFS7)/6│。
The visible ray central vision focus point and infrared light central vision focus point (RGB/IR) of whole optical imaging system
Between focus deviation represent that (i.e. wavelength 850nm is to wavelength 555nm, linear module with FS：Mm), it meets absolute value │
(VSFS0+VTFS0)/2–(ISFS0+ITFS0)/2│；The average focus deviation in the visual field of visible ray three of whole optical imaging system
(i.e. wavelength is represented with AFS with the difference (focus deviation) between the average focus deviation (RGB/IR) in the visual field of infrared light three
850nm is to wavelength 555nm, linear module：Mm), it meets absolute value │ AIFS-AVFS │.
The image height of optical imaging system is represented with HOI；The height of optical imaging system is represented with HOS；Optical imagery
First lens thing side of system is represented to the distance between the 4th lens image side surface with InTL；4th lens of optical imaging system
Image side surface to the distance between imaging surface is represented with InB；InTL+InB=HOS；The fixed aperture (aperture) of optical imaging system is extremely
Distance between imaging surface is represented with InS；Distance between first lens and the second lens of optical imaging system represents (example with IN12
Show)；Thickness of first lens of optical imaging system on optical axis is represented (illustration) with TP1.
The lens parameter relevant with material
The abbe number of the first lens of optical imaging system is represented (illustration) with NA1；The refractive index of the first lens is with Nd1
Represent (illustration).
The lens parameter relevant with visual angle
Visual angle is represented with AF；The half at visual angle is represented with HAF；Chief ray angle is represented with MRA.
The lens parameter relevant with entrance pupil is gone out
The entrance pupil diameter of optical imaging system is represented with HEP；The visible ray low focal plane skew dual-purpose with infrared light
The emergent pupil of amount optical imaging system refers to the lens group behind aperture diaphragm and in image space imaging, emergent light
Pupil diameter is represented with HXP；The maximum effective radius of any surface of single lens refer to system maximum visual angle incident illumination pass through into
The light at pupil most edge is penetrated in the lens surface plotted point (Effective Half Diameter；EHD), the plotted point with
Vertical height between optical axis.The maximum effective radius of such as the first lens thing side represents with EHD11, the first lens image side surface
Maximum effective radius represented with EHD12.The maximum effective radius of the second lens thing side represents with EHD21, the second lens picture
The maximum effective radius of side is represented with EHD22.The maximum effective radius of any surface of remaining lens in optical imaging system
Representation is by that analogy.
The parameter relevant with lens face shape deflection depth
The maximum effective radius position of intersection point of the 4th lens thing side on optical axis to the 4th lens thing side is in optical axis
Horizontal displacement distance represented (illustration) with InRS41；Intersection point of the 4th lens image side surface on optical axis is to the 4th lens image side surface
Maximum effective radius position represented (illustration) with InRS42 in the horizontal displacement distance of optical axis.
The parameter relevant with lens face type
Critical point C is referred on certain lenses surface, and in addition to the intersection point with optical axis, one is tangent with the perpendicular tangent plane of optical axis
Point.Hold, the vertical dimension of such as critical point C31 of the 3rd lens thing side and optical axis is HVT31 (illustration), the 3rd lens picture
The critical point C32 of side is HVT32 (illustration), the critical point C41 and optical axis of the 4th lens thing side with the vertical dimension of optical axis
Vertical dimension be HVT41 (illustrations), the critical point C42 of the 4th lens image side surface and the vertical dimension of optical axis are HVT42 (examples
Show).Critical point on the thing side of other lenses or image side surface and its with the representation of the vertical dimension of optical axis according to aforementioned.
On 4th lens thing side closest to optical axis the point of inflexion be IF411, sinkage SGI411 (illustration),
SGI411 namely intersection point of the 4th lens thing side on optical axis between the point of inflexion of the nearest optical axis in the 4th lens thing side
The horizontal displacement distance parallel with optical axis, IF411 points are HIF411 (illustration) with the vertical dimension of light between centers.4th lens picture
The point of inflexion on side closest to optical axis is IF421, sinkage SGI421 (illustration), SGI411 namely the 4th lens pictures
Intersection point of the side on optical axis to horizontal displacement parallel with optical axis between the point of inflexion of the nearest optical axis of the 4th lens image side surface away from
From the IF421 points are HIF421 (illustration) with the vertical dimension of light between centers.
On 4th lens thing side the point of inflexion of the second close optical axis be IF412, sinkage SGI412 (illustration),
The point of inflexion of SGI412 namely intersection points of the 4th lens thing side on optical axis to the 4th the second close optical axis of lens thing side
Between the horizontal displacement distance parallel with optical axis, the IF412 points are HIF412 (illustration) with the vertical dimension of light between centers.4th is saturating
The point of inflexion of the second close optical axis is IF422 on mirror image side, sinkage SGI422 (illustration), SGI422 namely the 4th
It is parallel with optical axis between the point of inflexion of intersection point of the lens image side surface on optical axis to the 4th the second close optical axis of lens image side surface
Horizontal displacement distance, IF422 points are HIF422 (illustration) with the vertical dimension of light between centers.
On 4th lens thing side the point of inflexion of the 3rd close optical axis be IF413, sinkage SGI413 (illustration),
The point of inflexion of SGI413 namely intersection points to fourth lens thing side threeth close optical axis of the 4th lens thing side on optical axis
Between the horizontal displacement distance parallel with optical axis, the IF4132 points are HIF413 (illustration) with the vertical dimension of light between centers.4th
The point of inflexion of the 3rd close optical axis is IF423 on lens image side surface, sinkage SGI423 (illustration), SGI423 namely the
It is parallel with optical axis between the point of inflexion of intersection point to the close optical axis of the 4th lens image side surface the 3rd of the four lens image side surfaces on optical axis
Horizontal displacement distance, the vertical dimension of the IF423 points and light between centers is HIF423 (illustration).
On 4th lens thing side the point of inflexion of the 4th close optical axis be IF414, sinkage SGI414 (illustration),
The point of inflexion of SGI414 namely intersection points to fourth lens thing side fourth close optical axis of the 4th lens thing side on optical axis
Between the horizontal displacement distance parallel with optical axis, the IF414 points are HIF414 (illustration) with the vertical dimension of light between centers.4th is saturating
The point of inflexion of the 4th close optical axis is IF424 on mirror image side, sinkage SGI424 (illustration), SGI424 namely the 4th
Intersection point of the lens image side surface on optical axis is to parallel with optical axis between the point of inflexion of the close optical axis of the 4th lens image side surface the 4th
Horizontal displacement distance, IF424 points are HIF424 (illustration) with the vertical dimension of light between centers.
The expression of the point of inflexion on other lenses thing side or image side surface and its vertical dimension with optical axis or its sinkage
Mode is according to aforementioned.
The parameter relevant with aberration
The optical distortion (Optical Distortion) of optical imaging system is represented with ODT；Its TV distortion (TV
Distortion) represented with TDT, and can further limit be described in imaging 50% to 100% visual field between aberration skew
Degree；Spherical aberration offset amount is represented with DFS；Comet aberration side-play amount is represented with DFC.
Modulation transfer function performance plot (the Modulation Transfer Function of optical imaging system；MTF), use
Come the contrast contrast and sharpness of test and evaluation system imaging.The vertical coordinate axle of modulation transfer function performance plot represents right
Than the rate of transform (numerical value from 0 to 1), horizontal axis then representation space frequency (cycles/mm；Lp/mm (line is right/millimeter, line
pairs per mm)).Perfect imaging system in theory can the 100% lines contrast for being presented subject, but reality into
As system, the contrast transfer rate score of its vertical axis is less than 1.In addition, it is however generally that the marginal area of imaging can compare central area
It is more difficult to get fine reduction degree.On imaging surface, optical axis, 0.3 visual field and 0.7 visual field three are in space frequency for visible light spectrum
The contrast rate of transform (MTF numerical value) of rate 55cycles/mm represents respectively with MTFE0, MTFE3 and MTFE7, optical axis, 0.3 visual field
And 0.7 the contrast rate of transform (MTF numerical value) in spatial frequency 110cycles/mm of visual field three respectively with MTFQ0, MTFQ3 with
And MTFQ7 is represented, the contrast rate of transform (MTF of optical axis, 0.3 visual field and 0.7 visual field three in spatial frequency 220cycles/mm
Numerical value) represented with MTFH0, MTFH3 and MTFH7 respectively, optical axis, 0.3 visual field and 0.7 visual field three are in spatial frequency
The contrast rate of transform (MTF numerical value) of 440cycles/mm represents respectively with MTF0, MTF3 and MTF7, aforementioned these three visual fields pair
It is representative in the center of camera lens, interior visual field and outer visual field, therefore may be used to evaluate the performance of particular optical imaging system
It is whether excellent.If it is photosensitive containing less than 1.12 microns that the design of optical imaging system is respective pixel size (Pixel Size)
Element, therefore the quarter spaces frequency of modulation transfer function performance plot, 1/2nd spatial frequencys (half frequency) and completely
Spatial frequency (full range) is at least respectively 110cycles/mm, 220cycles/mm and 440cycles/mm.
If optical imaging system is while the imaging for infrared spectrum must be met, such as the night vision for low light source is needed
Ask, the operation wavelength for being used can be 850nm or 800nm, due to the object wheel that major function is formed in identification black and white light and shade
Exterior feature, without high-res, therefore can only need to evaluate particular optical imaging system from the spatial frequency less than 110cycles/mm
It is whether excellent in the performance of infrared spectrum.When focusing on imaging surface, image is regarded aforementioned operation wavelength 850nm in optical axis, 0.3
The contrast rate of transform (MTF numerical value) of field and 0.7 visual field three in spatial frequency 55cycles/mm is respectively with MTFI0, MTFI3
And MTFI7 is represented.However, also because infrared ray operation wavelength 850nm or 800nm and general visible wavelength far,
If optical imaging system needs visible ray and infrared ray (bimodulus) can be focused and respectively reach certain performance simultaneously, have in design
Suitable difficulty.
This utility model provides a kind of visible ray and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, and it the
The thing side of four lens or image side surface are provided with the point of inflexion, can effectively adjust the angle that each visual field is incident in the 4th lens, and pin
Optical distortion is corrected with TV distortion.In addition, the surface of the 4th lens can possess more preferably optical path adjusting ability, to be lifted
Image quality.
A kind of visible ray and the dual-purpose low focal plane side-play amount optical imaging system of infrared light are provided according to this utility model,
Included successively to image side by thing side：One first lens, with refracting power；One second lens, with refracting power；One the 3rd lens,
With refracting power；One the 4th lens, with refracting power；One first imaging surface, it is a specific visible ray picture perpendicular to optical axis
Plane and its central vision have maximum in the out of focus modulation conversion contrast rate of transform of the first spatial frequency；And one the second one-tenth
Image planes, it is that a specific infrared light image plane and its central vision perpendicular to optical axis is modulated in the out of focus of the first spatial frequency
The conversion contrast rate of transform has maximum, wherein the visible ray and the dual-purpose low focal plane side-play amount optical imaging system of infrared light
Lens with refracting power are four pieces, and at least one piece lens have positive refracting power in first lens to the 4th lens,
First lens to the focal length of the 4th lens is respectively f1, f2, f3, f4, low dual-purpose with infrared light of the visible ray
The focal length of focal plane side-play amount optical imaging system is f, the visible ray and the dual-purpose low focal plane side-play amount optics of infrared light
The entrance pupil diameter of imaging system is HEP, and the first lens thing side to first imaging surface has one on optical axis
Apart from HOS, the first lens thing side to the 4th lens image side surface has one apart from InTL on optical axis, described visible
Light is HAF with the half of the maximum visual angle of the dual-purpose low focal plane side-play amount optical imaging system of infrared light, described visible
Light has one on first imaging surface with the dual-purpose low focal plane side-play amount optical imaging system of infrared light perpendicular to optical axis
Maximum image height HOI, the distance between first imaging surface and second imaging surface on optical axis is FS；Described first is saturating
Mirror, second lens, the 3rd lens and the 4th lens are in 1/2HEP height and parallel to the thickness point of optical axis
Not Wei ETP1, ETP2, ETP3 and ETP4, the summation of aforementioned ETP1 to ETP4 is SETP, first lens, described second saturating
Mirror, the 3rd lens and the 4th lens are respectively TP1, TP2, TP3 and TP4 in the thickness of optical axis, and aforementioned TP1 is extremely
The summation of TP4 is STP, and it meets following condition：1≦f/HEP≦10；0deg<HAF≦150deg；0.5≦SETP/STP<1 with
And │ FS │≤30 μm.
Preferably, the wavelength of the infrared light between 700nm to 1000nm and first spatial frequency with SP1 tables
Show, it meets following condition：SP1≦440cycles/mm.
Preferably, on the first lens thing side in 1/2HEP height coordinate points to parallel between first imaging surface
In optical axis horizontal range be ETL, on the first lens thing side in 1/2HEP height coordinate points to the 4th lens
Horizontal range on image side surface parallel to optical axis between the coordinate points of 1/2HEP height is EIN, and it meets following condition：0.2≦
EIN/ETL<1。
Preferably, the second lens image side surface and the 3rd lens image side surface are convex surface on optical axis.
Preferably, the visible ray can with the maximum perpendicular of the dual-purpose low focal plane side-play amount optical imaging system of infrared light
The half of angle is VHAF, and the visible ray low focal plane side-play amount optical imaging system dual-purpose with infrared light meets following
Formula：VHAF≧10deg.
Preferably, the first lens thing side has one apart from HOS to first imaging surface on optical axis, it is described can
See that the light low focal plane side-play amount optical imaging system dual-purpose with infrared light has on first imaging surface perpendicular to optical axis
One maximum image height HOI, the visible ray low focal plane side-play amount optical imaging system dual-purpose with infrared light meets following
Condition：HOS/HOI≧1.2.
Preferably, on the first lens thing side in 1/2HEP height coordinate points to the 4th lens image side surface
Horizontal range parallel to optical axis between the coordinate points of 1/2HEP height is EIN, and it meets following equation：0.3≦SETP/EIN<
1。
Preferably, on the 3rd lens image side surface in 1/2HEP height coordinate points to parallel between first imaging surface
In optical axis horizontal range be EBL, on the 4th lens image side surface with the intersection point of optical axis to first imaging surface parallel to
The horizontal range of optical axis is BL, and it meets following equation：0.1≦EBL/BL≦1.5.
Preferably, also including an aperture, and the aperture has a distance to first imaging surface on optical axis
InS, the first lens thing side to first imaging surface has one apart from HOS on optical axis, and it meets following equation：
0.2≦InS/HOS≦1.1。
A kind of visible ray and the dual-purpose low focal plane side-play amount optical imagery system of infrared light are separately provided according to this utility model
System, is included successively by thing side to image side：One first lens, with positive refracting power；One second lens, with refracting power, its image side
Face is convex surface on optical axis；One the 3rd lens, with refracting power, its image side surface is convex surface on optical axis；One the 4th lens, have
Refracting power；One first imaging surface, it is a specific visible ray image plane perpendicular to optical axis and its central vision is empty in first
Between the out of focus modulation conversion contrast rate of transform of frequency have a maximum, first spatial frequency is 220cycles/mm；And one
Second imaging surface, it is a specific infrared light image plane and its central vision perpendicular to optical axis in first spatial frequency
The out of focus modulation conversion contrast rate of transform have maximum, wherein the visible ray and the dual-purpose low focal plane side-play amount light of infrared light
Learn imaging system to have the lens of refracting power is four pieces, and at least one piece lens have in second lens to the 4th lens
Positive refracting power, first lens to the focal length of the 4th lens is respectively f1, f2, f3, f4, the visible ray and infrared light
The focal length of dual-purpose low focal plane side-play amount optical imaging system is f, and the visible ray low focal plane dual-purpose with infrared light is inclined
The entrance pupil diameter of shifting amount optical imaging system is HEP, and the first lens thing side to first imaging surface is in optical axis
Upper to have one apart from HOS, the first lens thing side to the 4th lens image side surface has one apart from InTL on optical axis,
The visible ray is HAF with the half of the maximum visual angle of the dual-purpose low focal plane side-play amount optical imaging system of infrared light,
The visible ray and the dual-purpose low focal plane side-play amount optical imaging system of infrared light are on first imaging surface perpendicular to light
Axle has a maximum image height HOI, on the first lens thing side in 1/2HEP height coordinate points to described the first one-tenth
Between image planes parallel to optical axis horizontal range be ETL, on the first lens thing side in 1/2HEP height coordinate points to institute
It is EIN to state the horizontal range on the 4th lens image side surface parallel to optical axis between the coordinate points of 1/2HEP height, described the first one-tenth
Distance between image planes and second imaging surface on optical axis is FS, and it meets following condition：1≦f/HEP≦10；0deg<HAF
≦150deg；0.2≦EIN/ETL<1 and │ FS │≤30 μm.
Preferably, the visible ray and the dual-purpose low focal plane side-play amount optical imaging system of infrared light are in described the first one-tenth
There is a maximum image height HOI perpendicular to optical axis in image planes, it is seen that optical axis of the light on first imaging surface, 0.3HOI with
And the numerical value of the modulation conversion contrast rates of transform of the 0.7HOI tri- in spatial frequency 110cycles/mm is respectively with MTFQ0, MTFQ3
And MTFQ7 is represented, it meets following condition：MTFQ0≧0.2；MTFQ3≧0.01；And MTFQ7≤0.01.
Preferably, the visible ray can with the maximum perpendicular of the dual-purpose low focal plane side-play amount optical imaging system of infrared light
The half of angle is VHAF, and the visible ray low focal plane side-play amount optical imaging system dual-purpose with infrared light meets following
Formula：VHAF≧20deg.
Preferably, the first lens thing side has one apart from HOS to first imaging surface on optical axis, it is described can
See that the light low focal plane side-play amount optical imaging system dual-purpose with infrared light has on first imaging surface perpendicular to optical axis
One maximum image height HOI, the visible ray low focal plane side-play amount optical imaging system dual-purpose with infrared light meets following
Condition：HOS/HOI≧1.4.
Preferably, on the 3rd lens image side surface in 1/2HEP height coordinate points to the 4th lens thing side
In between the coordinate points of 1/2HEP height parallel to optical axis horizontal range be ED34, the 3rd lens and the 4th lens it
Between distance on optical axis be IN34, it meets following condition：0<ED34/IN34≦50.
Preferably, on the first lens image side surface in 1/2HEP height coordinate points to the second lens thing side
In between the coordinate points of 1/2HEP height parallel to optical axis horizontal range be ED12, first lens and second lens it
Between distance on optical axis be IN12, it meets following condition：0<ED12/IN12≦35.
Preferably, second lens in 1/2HEP height and parallel to optical axis thickness be ETP2, second lens
Thickness on optical axis is TP2, and it meets following condition：0.1≦ETP2/TP2≦5.
Preferably, the 3rd lens in 1/2HEP height and parallel to optical axis thickness be ETP3, the 3rd lens
Thickness on optical axis is TP3, and it meets following condition：0.1≦ETP3/TP3≦5.
Preferably, the 4th lens in 1/2HEP height and parallel to optical axis thickness be ETP4, the 4th lens
Thickness on optical axis is TP4, and it meets following condition：0.1≦ETP4/TP4≦5.
Preferably, at least one piece in first lens, second lens, the 3rd lens and the 4th lens
Lens are that light of the wavelength less than 500nm filters element.
A kind of visible ray and the dual-purpose low focal plane side-play amount optical imagery system of infrared light are provided again according to this utility model
System, is included successively by thing side to image side：One first lens, with positive refracting power；One second lens, with refracting power, its image side
Face is convex surface on optical axis；One the 3rd lens, with refracting power, its image side surface is convex surface on optical axis；One the 4th lens, have
Refracting power；One first average imaging surface, it is a specific visible ray image plane perpendicular to optical axis and is arranged at described visible
The central vision of light and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, 0.3 visual field and 0.7 visual field are each in the
One spatial frequency has a mean place of the out of focus position of corresponding maximum defocus modulation conversion contrast transfer rate score, and described the
One spatial frequency is 220cycles/mm；And one second average imaging surface, it is a specific infrared light picture perpendicular to optical axis
Plane and be arranged at the visible ray and the dual-purpose low focal plane side-play amount optical imaging system of infrared light central vision,
0.3 visual field and 0.7 visual field each have corresponding maximum defocus modulation conversion contrast rate of transform number in first spatial frequency
The mean place of the out of focus position of value, wherein the visible ray and the dual-purpose low focal plane side-play amount optical imaging system of infrared light
Lens with refracting power are four pieces, and at least one piece lens have positive refracting power in the 3rd lens to the 4th lens,
First lens to the focal length of the 4th lens is respectively f1, f2, f3, f4, low dual-purpose with infrared light of the visible ray
The focal length of focal plane side-play amount optical imaging system is f, the visible ray and the dual-purpose low focal plane side-play amount optics of infrared light
The entrance pupil diameter of imaging system is HEP, and the first lens thing side to the described first average imaging surface has on optical axis
Have one apart from HOS, the first lens thing side to the 4th lens image side surface has one apart from InTL on optical axis, described
Visible ray is HAF with the half of the maximum visual angle of the dual-purpose low focal plane side-play amount optical imaging system of infrared light, described
Visible ray and the dual-purpose low focal plane side-play amount optical imaging system of infrared light are on the described first average imaging surface perpendicular to light
Axle has a maximum image height HOI, flat to described first in the coordinate points of 1/2HEP height on the first lens thing side
Horizontal range between imaging surface parallel to optical axis is ETL, in the coordinate points of 1/2HEP height on the first lens thing side
It is EIN to the horizontal range on the 4th lens image side surface parallel to optical axis between the coordinate points of 1/2HEP height, described the
Distance between one average imaging surface and the second average imaging surface is AFS；Low Jiao dual-purpose with infrared light is flat for the visible ray
The half of the maximum perpendicular visible angle of face side-play amount optical imaging system is VHAF, and it meets following condition：1≦f/HEP≦
10；0deg<HAF≦150deg；│AFS│≦30μm；VHAF≤20deg and 0.2≤EIN/ETL<1.
Preferably, first lens in 1/2HEP height and parallel to optical axis thickness be ETP1, second lens
In 1/2HEP height and parallel to optical axis thickness be ETP2, the 3rd lens in 1/2HEP height and parallel to the thickness of optical axis
Spend for ETP3, the 4th lens are ETP4 in 1/2HEP height and parallel to the thickness of optical axis, and aforementioned ETP1's to ETP4 is total
With for SETP, it meets following equation：0.3≦SETP/EIN<1.
Preferably, the first lens thing side to the described first average imaging surface has one apart from HOS, institute on optical axis
State visible ray and the dual-purpose low focal plane side-play amount optical imaging system of infrared light on the described first average imaging surface perpendicular to
Optical axis has a maximum image height HOI, the visible ray and the dual-purpose low focal plane side-play amount optical imaging system of infrared light
Meet following condition：HOS/HOI≧1.6.
Preferably, the visible ray and the dual-purpose low focal plane side-play amount optical imaging system of infrared light image in described the
The line amplification of two average imaging surfaces is LM, and it meets following condition：LM≧0.0003.
Preferably, the visible ray also includes a light with the dual-purpose low focal plane side-play amount optical imaging system of infrared light
Circle, an imageing sensor, described image sensor is arranged at after the described first average imaging surface and at least provided with 100,000 pictures
Element, and the aperture to the described first average imaging surface has one apart from InS on optical axis, and the first lens thing side is extremely
The first average imaging surface has one apart from HOS on optical axis, and it meets following equation：0.2≦InS/HOS≦1.1.
Preferably, the visible ray also includes a light with the dual-purpose low focal plane side-play amount optical imaging system of infrared light
Circle, an imageing sensor and a drive module, described image sensor is arranged at after the described first average imaging surface and extremely
100,000 pixels are set less, and the aperture has one apart from InS to the described first average imaging surface on optical axis, described the
One lens thing side to the described first average imaging surface has one apart from HOS on optical axis, and the drive module is described with each
Mirror is coupled and makes each lens produce displacement, and it meets following equation：0.2≦InS/HOS≦1.1.
Single lens especially affect 1/2 entrance pupil diameter in the thickness of 1/2 entrance pupil diameter (HEP) height
(HEP) ability for correcting optical path difference between aberration and each field rays of each smooth linear field common area in the range of, thickness is bigger
The capability improving of aberration is then corrected, but while can also increase the degree of difficulty on manufacturing, it is therefore necessary to control single lens
In the thickness of 1/2 entrance pupil diameter (HEP) height, the lens are particularly controlled in 1/2 entrance pupil diameter (HEP) height
Proportionate relationship (ETP/TP) between thickness (TP) of the lens belonging to thickness (ETP) and the surface on optical axis.Such as first
Lens are represented in the thickness of 1/2 entrance pupil diameter (HEP) height with ETP1.Second lens are at 1/2 entrance pupil diameter (HEP)
The thickness of height is represented with ETP2.In optical imaging system remaining lens 1/2 entrance pupil diameter (HEP) height thickness,
Its representation is by that analogy.The summation of aforementioned ETP1 to ETP4 is SETP, and embodiments of the invention can meet following equation：
0.3≦SETP/EIN<1。
To weigh the degree of difficulty for lifting that the ability for correcting aberration and reduction are manufactured simultaneously, this need to be especially controlled saturating
Proportionate relationship of the mirror between the thickness (TP) on optical axis of thickness (ETP) and the lens of 1/2 entrance pupil diameter (HEP) height
(ETP/TP).Such as the first lens represent that the first lens are in light with ETP1 in the thickness of 1/2 entrance pupil diameter (HEP) height
Thickness on axle is TP1, and ratio between the two is ETP1/TP1.Thickness of second lens in 1/2 entrance pupil diameter (HEP) height
Degree represents that thickness of second lens on optical axis is TP2 with ETP2, and ratio between the two is ETP2/TP2.Optical imaging system
In ratio of remaining lens between the thickness (TP) on optical axis of thickness and the lens of 1/2 entrance pupil diameter (HEP) height
Relation, its representation is by that analogy.Embodiments of the invention can meet following equation：0.1≦ETP/TP≦5.
Adjacent two lens represent in the horizontal range of 1/2 entrance pupil diameter (HEP) height with ED, aforementioned levels distance
(ED) parallel to the optical axis of optical imaging system, and each smooth linear field in 1/2 entrance pupil diameter (HEP) position is especially affected
The ability of optical path difference between the amendment aberration of common area and each field rays, the more big ability for then correcting aberration of horizontal range
Probability will be lifted, but while the length that can also increase the degree of difficulty on manufacturing and limit optical imaging system is " micro-
The degree of contracting ", it is therefore necessary to control horizontal range (ED) of the lens of special neighbourhood two in 1/2 entrance pupil diameter (HEP) height.
To weigh the degree of difficulty for lifting the ability of amendment aberration and reducing the length " micro " of optical imaging system simultaneously,
Horizontal range (ED) with this adjacent two lens of adjacent two lens in 1/2 entrance pupil diameter (HEP) height need to especially be controlled
The proportionate relationship (ED/IN) between horizontal range (IN) on optical axis.Such as the first lens and the second lens are in 1/2 entrance pupils
The horizontal range of diameter (HEP) height represents that the horizontal range of the first lens and the second lens on optical axis is IN12 with ED12,
Ratio between the two is ED12/IN12.Second lens and the 3rd lens 1/2 entrance pupil diameter (HEP) height level away from
From being represented with ED23, the horizontal range of the second lens and the 3rd lens on optical axis is IN23, and ratio between the two is ED23/
IN23.Remaining adjacent two lens is adjacent with this in the horizontal range of 1/2 entrance pupil diameter (HEP) height in optical imaging system
Horizontal range of two lens on optical axis proportionate relationship between the two, its representation is by that analogy.
On 4th lens image side surface in 1/2HEP height coordinate points between the imaging surface parallel to optical axis level away from
With the intersection point of optical axis it is BL parallel to the horizontal range of optical axis to the imaging surface on the 4th lens image side surface from for EBL, this
Bright embodiment is to weigh the ability for lifting amendment aberration and the receiving space for reserving other optical elements simultaneously, under can meeting
Row formula：0.1≦EBL/BL≦1.5.Visible ray can enter one with the dual-purpose low focal plane side-play amount optical imaging system of infrared light
Step includes a filter element, and the filter element is located between the 4th lens and the imaging surface, on the 4th lens image side surface
In 1/2HEP height coordinate points between the filter element parallel to optical axis distance be EIR, on the 4th lens image side surface with
The intersection point of optical axis to the distance between the filter element parallel to optical axis is PIR, and embodiments of the invention can meet following equation：
0.2≦EIR/PIR≦0.8。
Aforementioned optical imaging system may be used to arrange in pairs or groups, and to be imaged on catercorner length be that the image below 1/1.2 inch of size is passed
Sensor, the size of the imageing sensor is preferably 1/2.3 inch, and the Pixel Dimensions of the imageing sensor are less than 1.4 microns of (μ
M), preferably its Pixel Dimensions is less than 1.12 microns (μm), and most preferably its Pixel Dimensions is less than 0.9 micron (μm).Additionally, the light
Learn imaging system and be applicable to length-width ratio for 16：9 imageing sensor.
Aforementioned optical imaging system is applicable to more than million or ten million pixel shoot with video-corder shadow requirement (such as 4K2K or title
UHD, QHD) and possess good image quality.
As │ f1 │>During f4, the system total height (HOS of optical imaging system；Height of Optic System) can be with
It is appropriate to shorten to reach the purpose of miniaturization.
As │ f2 │+│ f3 │>During │ f1 │+│ f4 │, by an at least lens in the second lens to the 3rd lens have it is weak just
Refracting power or weak negative refracting power.Alleged weak refracting power, the absolute value for referring to the focal length of certain lenses is more than 10.As the present invention the
An at least lens have weak positive refracting power in two lens to the 3rd lens, its can effectively share the positive refracting power of the first lens and
Unnecessary aberration is avoided to occur too early, on the contrary if an at least lens have weak negative flexion in the second lens to the 3rd lens
Power, then can finely tune the aberration of correcting system.
4th lens can have positive refracting power, in addition, an at least surface of the 4th lens can have an at least point of inflexion, can
Effectively suppress the incident angle of off-axis field rays, further can modified off-axis visual field aberration.
Description of the drawings
The above-mentioned and other feature of this utility model will be described in detail by referring to accompanying drawing.
Figure 1A shows the schematic diagram of the optical imaging system of this utility model first embodiment；
Figure 1B sequentially show the spherical aberration of the optical imaging system of this utility model first embodiment, astigmatism from left to right with
And the curve chart of optical distortion；
Fig. 1 C show the visible light spectrum modulation conversion characteristic pattern of this utility model first embodiment optical imaging system；
Fig. 1 D show the central vision of the visible light spectrum of this utility model first embodiment, 0.3 visual field, 0.7 visual field
Out of focus modulation conversion contrast rate of transform figure (Through Focus MTF)；
Fig. 1 E show infrared spectral central vision, 0.3 visual field, 0.7 visual field of this utility model first embodiment
Out of focus modulation conversion contrast rate of transform figure；
Fig. 2A shows the schematic diagram of the optical imaging system of this utility model second embodiment；
Fig. 2 B sequentially show the spherical aberration of the optical imaging system of this utility model second embodiment, astigmatism from left to right with
And the curve chart of optical distortion；
Fig. 2 C show the visible light spectrum modulation conversion characteristic pattern of this utility model second embodiment optical imaging system；
Fig. 2 D show the central vision of the visible light spectrum of this utility model second embodiment, 0.3 visual field, 0.7 visual field
Out of focus modulation conversion contrast rate of transform figure；
Fig. 2 E show infrared spectral central vision, 0.3 visual field, 0.7 visual field of this utility model second embodiment
Out of focus modulation conversion contrast rate of transform figure；
Fig. 3 A show the schematic diagram of the optical imaging system of this utility model 3rd embodiment；
Fig. 3 B sequentially show the spherical aberration of the optical imaging system of this utility model 3rd embodiment, astigmatism from left to right with
And the curve chart of optical distortion；
Fig. 3 C show the visible light spectrum modulation conversion characteristic pattern of this utility model 3rd embodiment optical imaging system；
Fig. 3 D show the central vision of the visible light spectrum of this utility model 3rd embodiment, 0.3 visual field, 0.7 visual field
Out of focus modulation conversion contrast rate of transform figure；
Fig. 3 E show infrared spectral central vision, 0.3 visual field, 0.7 visual field of this utility model 3rd embodiment
Out of focus modulation conversion contrast rate of transform figure；
Fig. 4 A show the schematic diagram of the optical imaging system of this utility model fourth embodiment；
Fig. 4 B sequentially show the spherical aberration of the optical imaging system of this utility model fourth embodiment, astigmatism from left to right with
And the curve chart of optical distortion；
Fig. 4 C show the visible light spectrum modulation conversion characteristic pattern of this utility model fourth embodiment optical imaging system；
Fig. 4 D show the central vision of the visible light spectrum of this utility model fourth embodiment, 0.3 visual field, 0.7 visual field
Out of focus modulation conversion contrast rate of transform figure；
Fig. 4 E show infrared spectral central vision, 0.3 visual field, 0.7 visual field of this utility model fourth embodiment
Out of focus modulation conversion contrast rate of transform figure；
Fig. 5 A show the schematic diagram of the optical imaging system of the embodiment of this utility model the 5th；
Fig. 5 B sequentially show the spherical aberration of the optical imaging system of the embodiment of this utility model the 5th, astigmatism from left to right with
And the curve chart of optical distortion；
Fig. 5 C show the visible light spectrum modulation conversion characteristic pattern of the embodiment optical imaging system of this utility model the 5th；
Fig. 5 D show central vision, 0.3 visual field, 0.7 visual field of the visible light spectrum of the embodiment of this utility model the 5th
Out of focus modulation conversion contrast rate of transform figure；
Fig. 5 E show infrared spectral central vision, 0.3 visual field, 0.7 visual field of the embodiment of this utility model the 5th
Out of focus modulation conversion contrast rate of transform figure；
Fig. 6 A show the schematic diagram of the optical imaging system of this utility model sixth embodiment；
Fig. 6 B sequentially show the spherical aberration of the optical imaging system of this utility model sixth embodiment, astigmatism from left to right with
And the curve chart of optical distortion；
Fig. 6 C show the visible light spectrum modulation conversion characteristic pattern of this utility model sixth embodiment optical imaging system；
Fig. 6 D show the central vision of the visible light spectrum of this utility model sixth embodiment, 0.3 visual field, 0.7 visual field
Out of focus modulation conversion contrast rate of transform figure；
Fig. 6 E show infrared spectral central vision, 0.3 visual field, 0.7 visual field of this utility model sixth embodiment
Out of focus modulation conversion contrast rate of transform figure.
Description of reference numerals
Optical imaging system：1、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
Infrared fileter：170、270、370、470、570、670
Imaging surface：180、280、380、480、580、680
Imageing sensor：190、290、390、490、590、690
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 focal length of the 4th 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
Thickness of first lens on optical axis：TP1
Thickness of second lens to the 4th lens on optical axis：TP2、TP3、TP4
The thickness summation of the lens of all tool refracting powers：ΣTP
The spacing distance of first lens and the second lens on optical axis：IN12
The spacing distance of second lens and the 3rd lens on optical axis：IN23
The spacing distance of 3rd lens and the 4th lens on optical axis：IN34
The maximum effective radius position of intersection point of the 4th lens thing side on optical axis to the 4th lens thing side is in optical axis
Horizontal displacement distance：InRS41
Closest to the point of inflexion of optical axis on 4th lens thing side：IF411；The sinkage：SGI411
Closest to the point of inflexion and the vertical dimension of light between centers of optical axis on 4th lens thing side：HIF411
Closest to the point of inflexion of optical axis on 4th lens image side surface：IF421；The sinkage：SGI421
Closest to the point of inflexion and the vertical dimension of light between centers of optical axis on 4th lens image side surface：HIF421
The point of inflexion of the second close optical axis on 4th lens thing side：IF412；The sinkage：SGI412
The vertical dimension of the point of inflexion of the second close optical axis and light between centers on 4th lens thing side：HIF412
The point of inflexion of the second close optical axis on 4th lens image side surface：IF422；The sinkage：SGI422
The vertical dimension of the point of inflexion of the second close optical axis and light between centers on 4th lens image side surface：HIF422
The point of inflexion of the 3rd close optical axis on 4th lens thing side：IF413；The sinkage：SGI413
The vertical dimension of the point of inflexion of the 3rd close optical axis and light between centers on 4th lens thing side：HIF413
The point of inflexion of the 3rd close optical axis on 4th lens image side surface：IF423；The sinkage：SGI423
The vertical dimension of the point of inflexion of the 3rd close optical axis and light between centers on 4th lens image side surface：HIF423
The point of inflexion of the 4th close optical axis on 4th lens thing side：IF414；The sinkage：SGI414
The vertical dimension of the point of inflexion of the 4th close optical axis and light between centers on 4th lens thing side：HIF414
The point of inflexion of the 4th close optical axis on 4th lens image side surface：IF424；The sinkage：SGI424
The vertical dimension of the point of inflexion of the 4th close optical axis and light between centers on 4th lens image side surface：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 (distance of the first lens thing side to imaging surface on optical axis)：HOS
The catercorner length of imageing sensor：Dg；The distance of aperture to imaging surface：InS
The distance of the first lens thing side to the 4th lens image side surface：InTL
The distance of the 4th lens image side surface to imaging surface：InB
The half (maximum image height) of the effective sensing region diagonal line length of imageing sensor：HOI
TV distortion (TV Distortion) of optical imaging system when imaging：TDT
Optical distortion (Optical Distortion) of optical imaging system when imaging：ODT
Specific embodiment
A kind of visible ray and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, are wrapped successively by thing side to image side
Include the first lens, the second lens, the 3rd lens and the 4th lens of tool refracting power.Low Jiao dual-purpose with infrared light is flat for visible ray
Face side-play amount optical imaging system may also include an imageing sensor, and it is arranged at imaging surface.
Optical imaging system can be designed using three operation wavelengths, respectively 486.1nm, 587.5nm, 656.2nm,
Reference wavelength is the reference wavelength of main extractive technique feature based on wherein 587.5nm.Optical imaging system can also use five
Operation wavelength is designed, respectively 470nm, 510nm, 555nm, 610nm, 650nm, and reference wavelength is based on wherein 555nm
The reference wavelength of main extractive technique feature.
The focal length f of optical imaging system and per a piece of lens with positive refracting power focal length fp ratio be PPR, optics
The ratio of the focal length f of imaging system and the focal length fn per a piece of lens with negative refracting power is NPR, the positive refracting power of all tools
The PPR summations of lens are Σ PPR, and the NPR summations of the lens of the negative refracting power of all tools are Σ NPR, are had when following condition is met
Help control total refracting power and total length of optical imaging system：0.5≤Σ PPR/ │ Σ NPR │≤4.5, it is preferred that can expire
Foot row condition：0.9≦ΣPPR/│ΣNPR│≦3.5.
The system altitude of optical imaging system be HOS, when HOS/f ratios level off to 1 when, be beneficial to make miniaturization and
The optical imaging system of very-high solution can be imaged.
The summation of the focal length fp of the every a piece of lens with positive refracting power of optical imaging system is Σ PP, is had per a piece of
The focal length summation of the lens of negative refracting power be Σ NP, the present invention optical imaging system a kind of embodiment, it meets following
Condition：0<ΣPP≦200；And f4/ Σ PP≤0.85.It is preferred that following condition can be met：0<ΣPP≦150；And 0.01
≦f4/ΣPP≦0.7.Thereby, contribute to controlling the focusing power of optical imaging system, and the positive flexion of appropriate distribution system
Power is produced too early with suppressing significant aberration.
Visible ray can further include an image sensing with the dual-purpose low focal plane side-play amount optical imaging system of infrared light
Device, it is arranged at imaging surface.Half (the as imaging of optical imaging system of the effective sensing region diagonal line length of imageing sensor
Height or maximum image height) it is called HOI, distance of the first lens thing side to imaging surface on optical axis is HOS, and it meets following bar
Part：HOS/HOI≧1.4；And 0.5≤HOS/f≤20.0.It is preferred that following condition can be met：1.4≦HOS/HOI≦10；
And 1≤HOS/f≤15.Thereby, the miniaturization of optical imaging system can be maintained, to be equipped on frivolous portable electronic product
On.
In addition, in visible ray of the present utility model and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, according to
Demand can arrange an at least aperture, to reduce veiling glare, contribute to lifting image quality.
In visible ray of the present utility model and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, aperture configuration
Can for preposition aperture or in put aperture, wherein preposition aperture implies that aperture is arranged between object and the first lens, in put aperture
Then represent that aperture is arranged between the first lens and imaging surface.If aperture is preposition aperture, can make the emergent pupil of optical imaging system with
Imaging surface produces longer distance and houses more optical elements, and can increase the efficiency that imageing sensor receives image；If
In put aperture, then contribute to the angle of visual field of expansion system, make optical imaging system that there is the advantage of wide-angle lens.Aforementioned aperture is extremely
Distance between imaging surface is InS, and it meets following condition：0.2≦InS/HOS≦1.1.It is preferred that following condition can be met：
0.4≦InS/HOS≦1.Thereby, the miniaturization for maintaining optical imaging system and the characteristic for possessing Radix Rumiciss can simultaneously be taken into account.
In visible ray of the present utility model and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, the first lens
Thing side to the distance between the 4th lens image side surface is InTL, and the thickness summation of the lens of all tool refracting powers is Σ on optical axis
TP, it meets following condition：0.2≦ΣTP/InTL≦0.95.It is preferred that following condition can be met：0.2≦ΣTP/InTL≦
0.9.Thereby, when the contrast that can simultaneously take into account system imaging and the yield of lens manufacture and appropriate back focal length is provided to hold
Put other elements.
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, and it meets following
Condition：0.01≦│R1/R2│≦100.It is preferred that 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, and it meets following
Condition：-200<(R7-R8)/(R7+R8)<30.Thereby, be conducive to correcting the astigmatism produced by optical imaging system.
The spacing distance of first lens and the second lens on optical axis is IN12, and it meets following condition：0<IN12/f≦
5.0.It is preferred that following condition can be met：0.01≦IN12/f≦4.0.Thereby, contribute to improving the aberration of lens to lift it
Performance.
The spacing distance of second lens and the 3rd lens on optical axis is IN23, and it meets following condition：0<IN23/f≦
5.0.It is preferred that following condition can be met：0.01≦IN23/f≦3.0.Thereby, contribute to improving the performance of lens.
The spacing distance of 3rd lens and the 4th lens on optical axis is IN34, and it meets following condition：0<IN34/f≦
5.0.It is preferred that following condition can be met：0.001≦IN34/f≦3.0.Thereby, contribute to improving the performance of lens.
The thickness of first lens and the second lens on optical axis is respectively TP1 and TP2, and it meets following condition：1≦
(TP1+IN12)/TP2≦20.Thereby, contribute to controlling the sensitivity of optical imaging system manufacture and lifting its performance.
The thickness of 3rd lens and the 4th lens on optical axis is respectively TP3 and TP4, and aforementioned two lens are on optical axis
Spacing distance is IN34, and it meets following condition：0.2≦(TP4+IN34)/TP4≦20.Thereby, contribute to controlling optical imagery
The sensitivity of system manufacture simultaneously reduces system total height.
The spacing distance of second lens and the 3rd lens on optical axis is IN23, and the first lens to the 4th lens are on optical axis
Summation distance be Σ TP, it meets following condition：0.01≦IN23/(TP2+IN23+TP3)≦0.9.It is preferred that can meet
Following condition：0.05≦IN23/(TP2+IN23+TP3)≦0.7.Thereby help and correct a little layer by layer incident illumination traveling process institute
The aberration of generation simultaneously reduces system total height.
In visible ray of the present utility model and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, the 4th lens
The maximum effective radius position of intersection point of the thing side 142 on optical axis to the 4th lens thing side 142 is in the horizontal displacement of optical axis
Distance for InRS41 (if horizontal displacement is towards image side, InRS41 be on the occasion of；If horizontal displacement is towards thing side, InRS41 is negative
Value), the maximum effective radius position of intersection point of the 4th lens image side surface 144 on optical axis to the 4th lens image side surface 144 is in light
The horizontal displacement distance of axle is InRS42, and thickness of the 4th lens 140 on optical axis is TP4, and it meets following condition：-1mm≦
InRS41≦1mm；-1mm≦InRS42≦1mm；1mm≦│InRS41│+│InRS42│≦2mm；0.01≦│InRS41│/TP4
≦10；0.01≦│InRS42│/TP4≦10.Thereby, maximum effective radius position between the 4th lens two sides is can control, and is helped
In the peripheral field of optical imaging system lens error correction and effectively maintain its miniaturization.
In optical imaging system of the present utility model, intersection point of the 4th lens thing side on optical axis is to the 4th lens thing side
The horizontal displacement distance parallel with optical axis represents that the 4th lens image side surface is in light with SGI411 between the point of inflexion of the nearest optical axis in face
Intersection point on axle to horizontal displacement distance parallel with optical axis between the point of inflexion of the nearest optical axis of the 4th lens image side surface with
SGI421 represents that it meets following condition：0<SGI411/(SGI411+TP4)≦0.9；0<SGI421/(SGI421+TP4)≦
0.9.It is preferred that following condition can be met：0.01<SGI411/(SGI411+TP4)≦0.7；0.01<SGI421/(SGI421+
TP4)≦0.7。
Between the point of inflexion of intersection point of the 4th lens thing side on optical axis to the 4th the second close optical axis of lens thing side
The horizontal displacement distance parallel with optical axis represents that intersection point of the 4th lens image side surface on optical axis is to the 4th lens picture with SGI412
The horizontal displacement distance parallel with optical axis represents that it meets following bar with SGI422 between the point of inflexion of the close optical axis in side second
Part：0<SGI412/(SGI412+TP4)≦0.9；0<SGI422/(SGI422+TP4)≦0.9.It is preferred that following bar can be met
Part：0.1≦SGI412/(SGI412+TP4)≦0.8；0.1≦SGI422/(SGI422+TP4)≦0.8.
The nearest point of inflexion of optical axis in 4th lens thing side represents with the vertical dimension of light between centers with HIF411, the 4th lens
The point of inflexion of intersection point of the image side surface on optical axis to the nearest optical axis of the 4th lens image side surface and the vertical dimension of light between centers with
HIF421 represents that it meets following condition：0.01≦HIF411/HOI≦0.9；0.01≦HIF421/HOI≦0.9.It is preferred that
Following condition can be met：0.09≦HIF411/HOI≦0.5；0.09≦HIF421/HOI≦0.5.
The point of inflexion of the 4th the second close optical axis of lens thing side represents with the vertical dimension of light between centers with HIF412, the 4th
The point of inflexion of intersection point of the lens image side surface on optical axis to the 4th the second close optical axis of lens image side surface it is vertical with light between centers away from
From being represented with HIF422, it meets following condition：0.01≦HIF412/HOI≦0.9；0.01≦HIF422/HOI≦0.9.Compared with
Goodly, following condition can be met：0.09≦HIF412/HOI≦0.8；0.09≦HIF422/HOI≦0.8.
The point of inflexion of the close optical axis in the 4th lens thing side the 3rd represents with the vertical dimension of light between centers with HIF413, the 4th
The point of inflexion of intersection point of the lens image side surface on optical axis to the close optical axis of the 4th lens image side surface the 3rd it is vertical with light between centers away from
From being represented with HIF423, it meets following condition：0.001mm≦│HIF413│≦5mm；0.001mm≦│HIF423│≦5mm.
It is preferred that following condition can be met：0.1mm≦│HIF423│≦3.5mm；0.1mm≦│HIF413│≦3.5mm.
The point of inflexion of the close optical axis in the 4th lens thing side the 4th represents with the vertical dimension of light between centers with HIF414, the 4th
The point of inflexion of intersection point of the lens image side surface on optical axis to the close optical axis of the 4th lens image side surface the 4th it is vertical with light between centers away from
From being represented with HIF424, it meets following condition：0.001mm≦│HIF414│≦5mm；0.001mm≦│HIF424│≦5mm.
It is preferred that following condition can be met：0.1mm≦│HIF424│≦3.5mm；0.1mm≦│HIF414│≦3.5mm.
Visible ray of the present utility model is implemented with a kind of of the dual-purpose low focal plane side-play amount optical imaging system of infrared light
Mode, by being staggered with the lens of low abbe number with high abbe number, and can contribute to optical imaging system aberration
Amendment.
Above-mentioned aspheric equation is：
Z=ch2/[1+[1(k+1)c2h2]0.5]+A4h4+A6h6+A8h8+A10h10+A12h12+A14h14+A16h16+
A18h18+A20h20+… (1)
Wherein, z is the positional value for making to refer to surface vertices for the position of h in height along optical axis direction, and k is conical surface system
Number, c is the inverse of radius of curvature, and A4, A6, A8, A10, A12, A14, A16, A18 and A20 are order aspherical coefficients.
In visible ray and the dual-purpose low focal plane side-play amount optical imaging system of infrared light that this utility model is provided, lens
Material can be plastics or glass.When lens material is plastics, production cost and weight can be effectively reduced.The another material for working as lens
Matter is glass, then can control heat effect and increase the design space of optical imaging system refracting power configuration.Additionally, light is studied
As the thing side of the first lens to the 4th lens in system and image side surface can be aspheric surface, it can obtain more controlled variable,
In addition to cut down aberration, even the number that lens are used can be reduced compared to the use of traditional glass lens, therefore can be effective
Reduce the total height of optical imaging system of the present invention.
Furthermore, visible ray and the dual-purpose low focal plane side-play amount optical imaging system of infrared light that this utility model is provided
In, 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 thoroughly
Mirror surface is concave surface at dipped beam axle.
In addition, in visible ray of the present utility model and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, according to
Demand can arrange an at least diaphragm, to reduce veiling glare, contribute to lifting image quality.
Visible ray of the present utility model and the dual-purpose also visual demand of low focal plane side-play amount optical imaging system of infrared light
It is applied to move in the optical system focused, and has the characteristic of excellent lens error correction and good image quality concurrently, should so as to expand
Use aspect.
Visible ray of the present utility model and the dual-purpose also visual demand of low focal plane side-play amount optical imaging system of infrared light
Including a drive module, the drive module can be coupled with these lens and make these lens produce displacement.Aforementioned drive module
Can be that voice coil motor (VCM) is used to drive camera lens to be focused, or shoot for reduction for optical anti-vibration element (OIS)
Journey causes occurrence frequency out of focus because of camera lens vibration.
Visible ray of the present utility model and the dual-purpose also visual demand of low focal plane side-play amount optical imaging system of infrared light
An at least lens in the first lens, the second lens, the 3rd lens and the 4th lens are made to be that light of the wavelength less than 500nm filters unit
Part, it be able to can be filtered short by plated film on an at least surface of the lens of the specific tool filtering function or the lens itself by tool
Reach made by the material of wavelength.
According to above-mentioned embodiment, specific embodiment set forth below simultaneously coordinates schema to be described in detail.
First embodiment
Figure 1A and Figure 1B is refer to, wherein Figure 1A is shown according to a kind of optical imagery of this utility model first embodiment
The schematic diagram of system, Figure 1B is followed successively by from left to right spherical aberration, astigmatism and the optical distortion of the optical imaging system of first embodiment
Curve chart.Fig. 1 C show the visible light spectrum modulation conversion characteristic pattern of the present embodiment.Fig. 1 D show that this utility model is implemented
The central vision of the visible light spectrum of example, 0.3 visual field, the out of focus modulation conversion contrast rate of transform figure (Through of 0.7 visual field
Focus MTF)；Fig. 1 E show that the infrared spectral central vision of this utility model first embodiment, 0.3 visual field, 0.7 regard
The out of focus modulation conversion contrast rate of transform figure of field.From Figure 1A, optical imaging system 10 includes successively the by thing side to image side
One lens 110, the second lens 120, aperture 100, the 3rd lens 130, the 4th lens 140, infrared fileter 170, imaging surface 180
And imageing sensor 190.
First lens 110 have a negative refracting power, and for glass material, its thing side 112 is convex surface, and its image side surface 114 is
Concave surface, and it is all aspheric surface.Thickness of first lens on optical axis is TP1, and the first lens are at 1/2 entrance pupil diameter (HEP)
The thickness of height is represented with ETP1.
With light between the point of inflexion of intersection point of the first lens thing side on optical axis to the nearest optical axis in the first lens thing side
The parallel horizontal displacement distance of axle represents that intersection point of the first lens image side surface on optical axis is to the first lens image side surface with SGI111
Recently horizontal displacement distance parallel with optical axis between the point of inflexion of optical axis represents that it meets following condition with SGI121：
SGI111=0mm；SGI121=0mm；│ SGI111 │/(│ SGI111 │+TP1)=0；│ SGI121 │/(│ SGI121 │+TP1)=
0。
The point of inflexion of intersection point of the first lens thing side on optical axis to the nearest optical axis in the first lens thing side and light between centers
Vertical dimension represent that intersection point of the first lens image side surface on optical axis is to the nearest optical axis of the first lens image side surface with HIF111
The point of inflexion represents that it meets following condition with the vertical dimension of light between centers with HIF121：HIF111=0mm；HIF121=0mm；
HIF111/HOI=0；HIF121/HOI=0.
Second lens 120 have a positive refracting power, and for plastic material, its thing side 122 is concave surface, and its image side surface 124 is
Convex surface, and aspheric surface is all, and its thing side 122 has a point of inflexion.Thickness of second lens on optical axis be TP2, second
Lens are represented in the thickness of 1/2 entrance pupil diameter (HEP) height with ETP2.
With light between the point of inflexion of intersection point of the second lens thing side on optical axis to the nearest optical axis in the second lens thing side
The parallel horizontal displacement distance of axle represents that intersection point of the second lens image side surface on optical axis is to the second lens image side surface with SGI211
Recently horizontal displacement distance parallel with optical axis between the point of inflexion of optical axis represents that it meets following condition with SGI221：
SGI211=-0.13283mm；│ SGI211 │/(│ SGI211 │+TP2)=0.05045.
The point of inflexion of intersection point of the second lens thing side on optical axis to the nearest optical axis in the second lens thing side and light between centers
Vertical dimension represent that intersection point of the second lens image side surface on optical axis is to the nearest optical axis of the second lens image side surface with HIF211
The point of inflexion represents that it meets following condition with the vertical dimension of light between centers with HIF221：HIF211=2.10379mm；HIF211/
HOI=0.69478.
3rd lens 130 have a negative refracting power, and for plastic material, its thing side 132 is concave surface, and its image side surface 134 is
Concave surface, and aspheric surface is all, and its image side surface 134 has a point of inflexion.Thickness of 3rd lens on optical axis be TP3, the 3rd
Lens are represented in the thickness of 1/2 entrance pupil diameter (HEP) height with ETP3.
Intersection point of the 3rd lens thing side on optical axis between the point of inflexion of the nearest optical axis in the 3rd lens thing side with light
The parallel horizontal displacement distance of axle represents that intersection point of the 3rd lens image side surface on optical axis is to the 3rd lens image side surface with SGI311
Recently horizontal displacement distance parallel with optical axis between the point of inflexion of optical axis represents that it meets following condition with SGI321：
SGI321=0.01218mm；│ SGI321 │/(│ SGI321 │+TP3)=0.03902.
The nearest point of inflexion of optical axis in 3rd lens thing side represents with the vertical dimension of light between centers with HIF311, the 3rd lens
The point of inflexion of intersection point of the image side surface on optical axis to the nearest optical axis of the 3rd lens image side surface and the vertical dimension of light between centers with
HIF321 represents that it meets following condition：HIF321=0.84373mm；HIF321/HOI=0.27864.
4th lens 140 have a positive refracting power, and for plastic material, its thing side 142 is convex surface, and its image side surface 144 is
Convex surface, and aspheric surface is all, and its image side surface 144 has a point of inflexion.Thickness of 4th lens on optical axis be TP4, the 4th
Lens are represented in the thickness of 1/2 entrance pupil diameter (HEP) height with ETP4.
Intersection point of the 4th lens thing side on optical axis between the point of inflexion of the nearest optical axis in the 4th lens thing side with light
The parallel horizontal displacement distance of axle represents that intersection point of the 4th lens image side surface on optical axis is to the 4th lens image side surface with SGI411
Recently horizontal displacement distance parallel with optical axis between the point of inflexion of optical axis represents that it meets following condition with SGI421：
SGI411=0mm；SGI421=-0.41627mm；│ SGI411 │/(│ SGI411 │+TP4)=0；│SGI421│/(│SGI421│+
TP4)=0.25015.
Between the point of inflexion of intersection point of the 4th lens thing side on optical axis to the 4th the second close optical axis of lens thing side
The horizontal displacement distance parallel with optical axis represents that it meets following condition with SGI412：SGI412=0mm；│SGI412│/(│
SGI412 │+TP4)=0.
The nearest point of inflexion of optical axis in 4th lens thing side represents with the vertical dimension of light between centers with HIF411, the 4th lens
The point of inflexion of the nearest optical axis of image side surface represents that it meets following condition with the vertical dimension of light between centers with HIF411：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 represents that it meets with the vertical dimension of light between centers with HIF412
Following condition：HIF412=0mm；HIF412/HOI=0.
Coordinate points on first lens thing side in 1/2HEP height are to the distance between the imaging surface parallel to optical axis
ETL, on the first lens thing side in 1/2HEP height coordinate points to the 4th lens image side surface in the seat of 1/2HEP height
Horizontal range between punctuate parallel to optical axis 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=0.345mm；ETP4=
1.168mm.Summation SETP=4.945mm of aforementioned ETP1 to ETP4.TP1=0.918mm；TP2=2.500mm；TP3=
0.300mm；TP4=1.248mm；Summation STP=4.966mm of aforementioned TP1 to TP4；SETP/STP=0.996；SETP/EIN
=0.40076.
The present embodiment controls respectively thickness (ETP) and the table of the lens in 1/2 entrance pupil diameter (HEP) height for special
Proportionate relationship (ETP/TP) between thickness (TP) of the lens belonging to face on optical axis, with manufacturing and amendment aberration energy
Balance is obtained between power, it meets following condition, ETP1/TP1=1.034；ETP2/TP2=0.993；ETP3/TP3=1.148；
ETP4/TP4=0.936.
The present embodiment is horizontal range of each adjacent two lens of control in 1/2 entrance pupil diameter (HEP) height, with light
Learn and obtain balance between length HOS " micro " degree of imaging system, manufacturing and amendment aberration ability three, particularly control
Adjacent two lens 1/2 entrance pupil diameter (HEP) height horizontal range (ED) two lens adjacent with this on optical axis
Proportionate relationship (ED/IN) between horizontal range (IN), it meets following condition, incident 1/2 between the first lens and the second lens
The horizontal range parallel to optical axis of pupil diameter (HEP) height is ED12=4.529mm；Between the second lens and the 3rd lens
The horizontal range parallel to optical axis of 1/2 entrance pupil diameter (HEP) height is ED23=2.735mm；3rd lens and the 4th
The horizontal range parallel to optical axis between lens in 1/2 entrance pupil diameter (HEP) height is ED34=0.131mm.
The horizontal range of first lens and the second lens on optical axis is IN12=4.571mm, and ratio between the two is
ED12/IN12=0.991.The horizontal range of second lens and the 3rd lens on optical axis is IN23=2.752mm, between the two
Ratio is ED23/IN23=0.994.The horizontal range of 3rd lens and the 4th lens on optical axis be IN34=0.094mm, two
Ratio between person is ED34/IN34=1.387.
On 4th lens image side surface in 1/2HEP height coordinate points to the horizontal range between the imaging surface parallel to optical axis
For EBL=6.405mm, with the intersection point of optical axis to the horizontal range between the imaging surface parallel to optical axis on the 4th lens image side surface
For BL=6.3642mm, embodiment of the present utility model can meet following equation：EBL/BL=1.00641.The present embodiment the 4th
Coordinate points on lens image side surface in 1/2HEP height are EIR=to the distance between infrared fileter parallel to optical axis
0.065mm, with the intersection point of optical axis to the distance between infrared fileter parallel to optical axis is PIR=on the 4th lens image side surface
0.025mm, and meet following equation：EIR/PIR=2.631.
Infrared fileter 170 is glass material, and it is arranged between the 4th lens 140 and imaging surface 180 and does not affect optics
The focal length of imaging system.
In the optical imaging system of first embodiment, the focal length of optical imaging system is f, the incident illumination of optical imaging system
The a diameter of HEP of pupil, the half at maximum visual angle is HAF in optical imaging system, and its numerical value is 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, and the focal length of the 4th lens 140 is
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 lens 130 of the second lens 120 to the 3rd is respectively f2, f3,
It meets following condition：│ f2 │+│ f3 │=13.2561mm；│ f1 │+│ f4 │=8.2129mm and │ f2 │+│ f3 │>│f1│+│f4
│。
The focal length f of optical imaging system and per a piece of lens with positive refracting power focal length fp ratio be PPR, optics
The focal length f of imaging system and per a piece of lens with negative refracting power focal length fn ratio be NPR, the optics of first embodiment
In imaging system, the PPR summations of the lens of all positive refracting powers are Σ PPR=│ f/f2 │+│ f/f4 │=1.25394, all negative
The NPR summations of the lens of refracting power be Σ NPR=│ f/f1 │+│ f/f3 │=1.21490, Σ PPR/ │ Σ NPR │=1.03213.
Also meet following condition simultaneously：│ f/f1 │=0.49218；│ f/f2 │=0.28128；│ f/f3 │=0.72273；│ f/f4 │=
0.97267。
In the optical imaging system of first embodiment, between the lens image side surface 144 of the first lens thing side 112 to the 4th away from
From for InTL, the first lens thing side 112 to the distance between imaging surface 180 is HOS, and aperture 100 is to the distance between imaging surface 180
For InS, the half of the effective sensing region diagonal line length of imageing sensor 190 is HOI, and the 4th lens image side surface 144 is to imaging surface
Distance between 180 is InB, and 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；And InS/HOS=
0.4390。
In the optical imaging system of first embodiment, the thickness summation of the lens of all tool refracting powers is Σ on optical axis
TP, it meets following condition：Σ TP=4.9656mm；And Σ TP/InTL=0.4010.Thereby, when can simultaneously take into account system
The contrast of imaging and lens manufacture yield and provide appropriate back focal length with house other elements.
In the optical imaging system of first embodiment, the radius of curvature of the first lens thing side 112 is R1, the first lens picture
The radius of curvature of side 114 is R2, and it meets following condition：│ R1/R2 │=9.6100.Thereby, the first lens possess suitably just
Flexion force 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 4th lens picture
The radius of curvature of side 144 is R8, and it meets following condition：(R7-R8)/(R7+R8)=- 35.5932.Thereby, be conducive to repairing
Astigmatism produced by positive optical imaging system.
In the optical imaging system of first embodiment, the focal length summation of all lens for having positive refracting power is Σ PP, and it is expired
Foot row condition：Σ PP=12.30183mm；And f4/ Σ PP=0.22432.Thereby, contribute to suitably distributing the 4th lens
140 positive refracting power to other plus lens, to suppress the generation of the notable aberration of incident ray traveling process.
In the optical imaging system of first embodiment, it is Σ NP that all tools bear the focal length summation of the lens of refracting power, and it is expired
Foot row condition：Σ NP=-14.6405mm；And f1/ Σ NP=0.59488.Thereby, contribute to suitably distributing the first lens
Negative refracting power to other minus lenses, to suppress the generation of the notable aberration of incident ray traveling process.
In the optical imaging system of first embodiment, the spacing distance of the first lens 110 and the second lens 120 on optical axis
For IN12, it meets following condition：IN12=4.5709mm；IN12/f=1.70299.Thereby, contribute to improving the color of lens
Differ to lift its performance.
In the optical imaging system of first embodiment, the spacing distance of the second lens 120 and the 3rd lens 130 on optical axis
For IN23, it meets following condition：IN23=2.7524mm；IN23/f=1.02548.Thereby, contribute to improving the color of lens
Differ to lift its performance.
In the optical imaging system of first embodiment, the spacing distance of the 3rd lens 130 and the 4th lens 140 on optical axis
For IN34, it meets following condition：IN34=0.0944mm；IN34/f=0.03517.Thereby, contribute to improving the color of lens
Differ to lift its performance.
In the optical imaging system of first embodiment, the thickness difference of the first lens 110 and the second lens 120 on optical axis
For TP1 and TP2, it meets following condition：TP1=0.9179mm；TP2=2.5000mm；TP1/TP2=0.36715 and
(TP1+IN12)/TP2=2.19552.Thereby, contribute to controlling the sensitivity of optical imaging system manufacture and lifting its performance.
In the optical imaging system of first embodiment, the thickness difference of the 3rd lens 130 and the 4th lens 140 on optical axis
For TP3 and TP4, spacing distance of aforementioned two lens on optical axis is IN34, and it meets following condition：TP3=0.3mm；TP4
=1.2478mm；TP3/TP4=0.24043 and (TP4+IN34)/TP3=4.47393.Thereby, contribute to control light to study
As system manufacture sensitivity and reduce system total height.
In the optical imaging system of first embodiment, it meets following condition：IN23/ (TP2+IN23+TP3)=
0.49572.Thereby help and correct a little layer by layer the aberration produced by incident illumination traveling process and reduce system total height.
In the optical imaging system of first embodiment, intersection point of the 4th lens thing side 142 on optical axis is to the 4th lens
The maximum effective radius position of thing side 142 is InRS41 in the horizontal displacement distance of optical axis, and the 4th lens image side surface 144 is in light
The maximum effective radius position of the intersection point on axle to the 4th lens image side surface 144 is InRS42 in the horizontal displacement distance of optical axis,
Thickness of 4th lens 140 on optical axis is TP4, and it meets following condition：InRS41=0.2955mm；InRS42=-
0.4940mm；│ InRS41 │+│ InRS42 │=0.7894mm；│ InRS41 │/TP4=0.23679；And │ InRS42 │/TP4=
0.39590.Thereby be conducive to eyeglass to make and molding, and effectively maintain its miniaturization.
In the optical imaging system of the present embodiment, the critical point C41 of the 4th lens thing side 142 and the vertical dimension of optical axis
For HVT41, the critical point C42 of the 4th lens image side surface 144 is HVT42 with the vertical dimension of optical axis, and 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 abbe number of the second lens
For NA2, the abbe number of the 3rd lens is NA3, and the abbe number of the 4th lens is NA4, and it meets following condition：│NA1-NA2
│=0.0351.Thereby, the amendment of optical imaging system aberration is contributed to.
In the optical imaging system of first embodiment, TV distortion of optical imaging system when imaging is TDT, during imaging
Optical distortion is ODT, and it meets following condition：TDT=37.4846%；ODT=-55.3331%.
The light of the arbitrary visual field of this utility model embodiment can be further divided into sagittal surface light (sagittal ray)
And meridional ray (tangential ray), and the evaluation basis of focus deviation and MTF numerical value is spatial frequency
220cycles/mm.Visible ray central vision, 0.3 visual field, the focus of the out of focus MTF maximum of the sagittal surface light of 0.7 visual field
Side-play amount represents (linear module with VSFS0, VSFS3, VSFS7 respectively：Mm), its numerical value be respectively 0.00000mm,
0.00000mm、0.00000mm；Visible ray central vision, 0.3 visual field, the out of focus MTF maximum of the sagittal surface light of 0.7 visual field
Represented with VSMTF0, VSMTF3, VSMTF7 respectively, its numerical value is respectively 0.416,0.397,0.342；Visible ray central vision,
0.3 visual field, the focus deviation of the out of focus MTF maximum of the meridional ray of 0.7 visual field are respectively with VTFS0, VTFS3, VTFS7
Represent (linear module：Mm), its numerical value is respectively 0.00000mm, 0.00000mm, -0.01000mm；Visible ray central vision,
0.3 visual field, the out of focus MTF maximum of the meridional ray of 0.7 visual field represent that respectively it is counted with VTMTF0, VTMTF3, VTMTF7
Value is respectively 0.416,0.34,0.139.The focus of the aforementioned visual field of visible ray sagittal surface three and the visual field of visible ray meridian plane three is inclined
The average focus deviation (position) of shifting amount represents (linear module with AVFS：Mm), it meets absolute value │ (VSFS0+VSFS3+
VSFS7+VTFS0+VTFS3+VTFS7)/6 │=│ -0.00200mm │.
The infrared light central vision of the present embodiment, 0.3 visual field, the out of focus MTF maximum of the sagittal surface light of 0.7 visual field
Focus deviation represents (linear module with ISFS0, ISFS3, ISFS7 respectively：Mm), its numerical value be respectively 0.03000mm,
0.03300mm, 0.03300mm, the average focus deviation (position) of the focus deviation of the visual field of aforementioned sagittal surface three is with AISFS
Represent；Infrared light central vision, 0.3 visual field, the sagittal surface light of 0.7 visual field out of focus MTF maximum respectively with ISMTF0,
ISMTF3, ISMTF7 represent that its numerical value is respectively 0.169,0.148,0.089；Infrared light central vision, 0.3 visual field, 0.7 regard
The focus deviation of the out of focus MTF maximum of the meridional ray of field represents that (tolerance is single with ITFS0, ITFS3, ITFS7 respectively
Position：Mm), its numerical value is respectively 0.03,0.028,0.005, and the average focus of the focus deviation of the visual field of aforementioned meridian plane three is inclined
Shifting amount (position) represents (linear module with AITFS：mm)；Infrared light central vision, 0.3 visual field, the meridional ray of 0.7 visual field
Out of focus MTF maximum represented with ITMTF0, ITMTF3, ITMTF7 respectively, its numerical value is respectively 0.169,0.093,
0.00000.The average focus of the focus deviation of the aforementioned visual field of infrared light sagittal surface three and the visual field of infrared light meridian plane three is inclined
Shifting amount (position) represents (linear module with AIFS：Mm), it meets absolute value │ (ISFS0+ISFS3+ISFS7+ITFS0+ITFS3
+ ITFS7)/6 │=│ 0.02600mm │.
The visible ray central vision focus point of the whole optical imaging system of the present embodiment and infrared light central vision focus point
(RGB/IR) focus deviation between represents that (i.e. wavelength 850nm is to wavelength 555nm, linear module with FS：Mm), it meets exhausted
To value │ (VSFS0+VTFS0)/2-(ISFS0+ITFS0)/2 │=│ 0.03000mm │；The visible ray three of whole optical imaging system
Difference (focus deviation) between the average focus deviation in visual field and the visual field of infrared light three average focus deviation (RGB/IR)
Represent that (i.e. wavelength 850nm is to wavelength 555nm, linear module with AFS：Mm), it meets absolute value │ AIFS-AVFS │=│
0.02800mm│。
In the optical imaging system of the present embodiment, it is seen that optical axis, 0.3HOI and 0.7HOI tri- of the light on the imaging surface
In quarter spaces frequency (110cycles/mm) modulation conversion contrast the rate of transform (MTF numerical value) respectively with MTFQ0,
MTFQ3 and MTFQ7 represent that it meets following condition：MTFQ0 is about 0.65；MTFQ3 is about 0.52；And MTFQ7 is about
0.42.Modulation of optical axis, 0.3HOI and 0.7HOI tri- of the visible ray on the imaging surface in spatial frequency 55cycles/mm
The conversion contrast rate of transform (MTF numerical value) represents that respectively it meets following condition with MTFE0, MTFE3 and MTFE7：MTFE0 is about
For 0.84；MTFE3 is about 0.76；And MTFE7 is about 0.69.
Coordinate again with reference to following table one and table two.
The asphericity coefficients of table two, first embodiment
Table one is the detailed structured data of Fig. 1 first embodiments, the wherein unit of radius of curvature, thickness, distance and focal length
Represent successively by the surface of thing side to image side for mm, and surface 0-14.Table two is the aspherical surface data in first embodiment, its
In, the conical surface coefficient in k table aspheric curve equations, A1-A20 then represents each surface 1-20 rank asphericity coefficients.Additionally,
Following embodiment form is the schematic diagram and aberration curve figure of each embodiment of correspondence, and the definition of data is all real with first in form
Apply example table one and table two definition it is identical, here is not added with repeating.
Second embodiment
Fig. 2A and Fig. 2 B are refer to, wherein Fig. 2A is shown according to a kind of optical imagery of this utility model second embodiment
The schematic diagram of system, Fig. 2 B are followed successively by from left to right spherical aberration, astigmatism and the optical distortion of the optical imaging system of second embodiment
Curve chart.Fig. 2 C show the visible light spectrum modulation conversion characteristic pattern of the present embodiment.Fig. 2 D show this utility model second
The central vision of the visible light spectrum of embodiment, 0.3 visual field, the out of focus modulation conversion contrast rate of transform figure of 0.7 visual field；Fig. 2 E show
Infrared spectral central vision, 0.3 visual field, the out of focus modulation conversion of 0.7 visual field of this utility model second embodiment are gone out
Contrast rate of transform figure.From Fig. 2A, optical imaging system by thing side to image side include successively the first lens 210, aperture 200,
Second lens 220, the 3rd lens 230, the 4th lens 240, infrared fileter 270, imaging surface 280 and imageing sensor 290.
First lens 210 have a negative refracting power, and for plastic material, its thing side 212 is convex surface, and its image side surface 214 is
Concave surface, and aspheric surface is all, and its thing side 212 and image side surface 214 are respectively provided with a point of inflexion.
Second lens 220 have a positive refracting power, and for plastic material, its thing side 222 is convex surface, and its image side surface 224 is
Convex surface, and aspheric surface is all, and its thing side 222 has a point of inflexion.
3rd lens 230 have a positive refracting power, and for plastic material, its thing side 232 is concave surface, and its image side surface 234 is
Convex surface, and aspheric surface is all, and its thing side 232 and image side surface 234 are respectively provided with a point of inflexion.
4th lens 240 have a negative refracting power, and for plastic material, its thing side 242 is convex surface, and its image side surface 244 is
Concave surface, and aspheric surface is all, and its thing side 242 and image side surface 244 are respectively provided with a point of inflexion.
Infrared fileter 270 is glass material, and it is arranged between the 4th lens 240 and imaging surface 280 and does not affect optics
The focal length of imaging system.
In the optical imaging system of second embodiment, the second lens, the 3rd lens are plus lens, its respective focal length point
Not Wei f2 and f3, the focal length summation of the lens of the positive refracting power of all tools is Σ PP, and it meets following condition：Σ PP=f2+f3.
Thereby, contribute to suitably distributing the positive refracting power of single lens to other plus lens, to suppress the notable picture of incident illumination traveling process
Poor generation.
In the optical imaging system of second embodiment, it is Σ NP that all tools bear the focal length summation of the lens of refracting power, and it is expired
Foot row condition：Σ NP=f1+f4.
Please coordinate with reference to following table three and table four.
The asphericity coefficients of table four, second embodiment
In second embodiment, aspheric fitting equation represents the form such as first embodiment.Additionally, following table parameter
Definition is all identical with first embodiment, and not in this to go forth.
Following condition formulae numerical value is obtained according to table three and table four：
Following condition formulae numerical value is obtained according to table three and table four：
3rd embodiment
Fig. 3 A and Fig. 3 B are refer to, wherein Fig. 3 A are shown according to a kind of optical imagery of this utility model 3rd embodiment
The schematic diagram of system, Fig. 3 B are followed successively by from left to right spherical aberration, astigmatism and the optical distortion of the optical imaging system of 3rd embodiment
Curve chart.Fig. 3 C show the visible light spectrum modulation conversion characteristic pattern of the present embodiment.Fig. 3 D show this utility model the 3rd
The central vision of the visible light spectrum of embodiment, 0.3 visual field, the out of focus modulation conversion contrast rate of transform figure of 0.7 visual field；Fig. 3 E show
Infrared spectral central vision, 0.3 visual field, the out of focus modulation conversion of 0.7 visual field of this utility model 3rd embodiment are gone out
Contrast rate of transform figure.From Fig. 3 A, optical imaging system by thing side to image side include successively the first lens 310, aperture 300,
Second lens 320, the 3rd lens 330, the 4th lens 340, infrared fileter 370, imaging surface 380 and imageing sensor 390.
First lens 310 have a positive refracting power, and for plastic material, its thing side 312 is convex surface, and its image side surface 314 is
Concave surface, and aspheric surface is all, its thing side 312 and image side surface 314 are respectively provided with a point of inflexion.
Second lens 320 have a positive refracting power, and for plastic material, its thing side 322 is convex surface, and its image side surface 324 is
Convex surface, and aspheric surface is all, its thing side 322 and image side surface 324 are respectively provided with a point of inflexion.
3rd lens 330 have a positive refracting power, and for plastic material, its thing side 332 is concave surface, and its image side surface 334 is
Convex surface, and aspheric surface is all, its thing side 332 and image side surface 334 are respectively provided with a point of inflexion.
4th lens 340 have a negative refracting power, and for plastic material, its thing side 342 is convex surface, and its image side surface 344 is
Concave surface, and aspheric surface is all, and its thing side 342 and image side surface 344 are respectively provided with a point of inflexion.
Infrared fileter 370 is glass material, and it is arranged between the 4th lens 340 and imaging surface 380 and does not affect optics
The focal length of imaging system.
In the optical imaging system of 3rd embodiment, the first lens, the second lens and the 3rd lens are plus lens, and its is each
From focal length be respectively f1, f2 and f3, the focal length summation of the lens of the positive refracting power of all tools is Σ PP, and it meets following bar
Part：Σ PP=f1+f2+f3.Thereby, contribute to suitably distributing the positive refracting power of single lens to other plus lens, with suppress into
Penetrate the generation of the notable aberration of light traveling process.
In the optical imaging system of 3rd embodiment, it is Σ NP that all tools bear the focal length summation of the lens of refracting power, and it is expired
Foot row condition：Σ NP=f4.
Please coordinate with reference to following table five and table six.
The asphericity coefficients of table six, 3rd embodiment
In 3rd embodiment, aspheric fitting equation represents the form such as first embodiment.Additionally, following table parameter
Definition is all identical with first embodiment, and not in this to go forth.
Following condition formulae numerical value is obtained according to table five and table six：
Following condition formulae numerical value is obtained according to table five and table six：
Fourth embodiment
Fig. 4 A and Fig. 4 B are refer to, wherein Fig. 4 A are shown according to a kind of optical imagery of this utility model fourth embodiment
The schematic diagram of system, Fig. 4 B are followed successively by from left to right spherical aberration, astigmatism and the optical distortion of the optical imaging system of fourth embodiment
Curve chart.Fig. 4 C show the visible light spectrum modulation conversion characteristic pattern of the present embodiment.Fig. 4 D show this utility model the 4th
The central vision of the visible light spectrum of embodiment, 0.3 visual field, the out of focus modulation conversion contrast rate of transform figure of 0.7 visual field；Fig. 4 E show
Infrared spectral central vision, 0.3 visual field, the out of focus modulation conversion of 0.7 visual field of this utility model fourth embodiment are gone out
Contrast rate of transform figure.From Fig. 4 A, optical imaging system by thing side to image side include successively the first lens 410, aperture 400,
Second lens 420, the 3rd lens 430, the 4th lens 440, infrared fileter 470, imaging surface 480 and imageing sensor 490.
First lens 410 have a positive refracting power, and for plastic material, its thing side 412 is convex surface, and its image side surface 414 is
Concave surface, and aspheric surface is all, and its thing side 412 and image side surface 414 are respectively provided with a point of inflexion.
Second lens 420 have a positive refracting power, and for plastic material, its thing side 422 is convex surface, and its image side surface 424 is
Convex surface, and aspheric surface is all, and its thing side 422 has a point of inflexion.
3rd lens 430 have a negative refracting power, and for plastic material, its thing side 432 is concave surface, and its image side surface 434 is
Convex surface, and aspheric surface is all, and its thing side 432 and image side surface 434 are respectively provided with a point of inflexion.
4th lens 440 have a positive refracting power, and for plastic material, its thing side 442 is convex surface, and its image side surface 444 is
Concave surface, and aspheric surface is all, and its thing side 442 and image side surface 444 are respectively provided with a point of inflexion.
Infrared fileter 470 is glass material, and it is arranged between the 4th lens 440 and imaging surface 480 and does not affect optics
The focal length of imaging system.
In the optical imaging system of fourth embodiment, the first lens, the second lens and the 4th lens are plus lens, and its is each
From focal length be respectively f1, f2 and f4, the focal length summation of the lens of the positive refracting power of all tools is Σ PP, and it meets following bar
Part：Σ PP=f1+f2+f4.Thereby, contribute to suitably distributing the positive refracting power of single lens to other plus lens, with suppress into
Penetrate the generation of the notable aberration of light traveling process.
In the optical imaging system of fourth embodiment, the focal length of the 3rd lens is f3, the lens of the negative refracting power of all tools
Focal length summation is Σ NP, and it meets following condition：Σ NP=f3.
Please coordinate with reference to following table seven and table eight.
The asphericity coefficients of table eight, fourth embodiment
In fourth embodiment, aspheric fitting equation represents the form such as first embodiment.Additionally, following table parameter
Definition is all identical with first embodiment, and not in this to go forth.
Following condition formulae numerical value is obtained according to table seven and table eight：
Following condition formulae numerical value is obtained according to table seven and table eight：
5th embodiment
Fig. 5 A and Fig. 5 B are refer to, wherein Fig. 5 A show a kind of optical imagery according to the embodiment of this utility model the 5th
The schematic diagram of system, Fig. 5 B are followed successively by from left to right spherical aberration, astigmatism and the optical distortion of the optical imaging system of the 5th embodiment
Curve chart.Fig. 5 C show the visible light spectrum modulation conversion characteristic pattern of the present embodiment.Fig. 5 D show this utility model the 5th
The central vision of the visible light spectrum of embodiment, 0.3 visual field, the out of focus modulation conversion contrast rate of transform figure of 0.7 visual field；Fig. 5 E show
Infrared spectral central vision, 0.3 visual field, the out of focus modulation conversion of 0.7 visual field of the embodiment of this utility model the 5th are gone out
Contrast rate of transform figure.From Fig. 5 A, optical imaging system by thing side to image side include successively the first lens 510, aperture 500,
Second lens 520, the 3rd lens 530, the 4th lens 540, infrared fileter 570, imaging surface 580 and imageing sensor 590.
First lens 510 have a positive refracting power, and for plastic material, its thing side 512 is convex surface, and its image side surface 514 is
Concave surface, and aspheric surface is all, and its thing side 512 and image side surface 514 are respectively provided with a point of inflexion.
Second lens 520 have a positive refracting power, and for plastic material, its thing side 522 is convex surface, and its image side surface 524 is
Convex surface, and aspheric surface is all, and its thing side 522 has a point of inflexion.
3rd lens 530 have a positive refracting power, and for plastic material, its thing side 532 is concave surface, and its image side surface 534 is
Convex surface, and aspheric surface is all, and its thing side 532 and image side surface 534 are respectively provided with a point of inflexion.
4th lens 540 have a negative refracting power, and for plastic material, its thing side 542 is convex surface, and its image side surface 544 is
Concave surface, and aspheric surface is all, and its thing side 542 and image side surface 544 are respectively provided with a point of inflexion.
Infrared fileter 570 is glass material, and it is arranged between the 4th lens 540 and imaging surface 580 and does not affect optics
The focal length of imaging system.
In the optical imaging system of the 5th embodiment, the first lens, the second lens, the 3rd lens are plus lens, and its is each
From focal length be respectively f1, f2 and f3, the focal length summation of the lens of the positive refracting power of all tools is Σ PP, and it meets following bar
Part：Σ PP=f1+f2+f3.Thereby, contribute to suitably distributing the positive refracting power of single lens to other plus lens, with suppress into
Penetrate the generation of the notable aberration of light traveling process.
In the optical imaging system of the 5th embodiment, it is Σ NP that all tools bear the focal length summation of the lens of refracting power, and it is expired
Foot row condition：Σ NP=f4.
Please coordinate with reference to following table nine and table ten.
The asphericity coefficients of table ten, the 5th embodiment
In 5th embodiment, aspheric fitting equation represents the form such as first embodiment.Additionally, following table parameter
Definition is all identical with first embodiment, and not in this to go forth.
Following condition formulae numerical value is obtained according to table nine and table ten：
Following condition formulae numerical value is obtained according to table nine and table ten：
Sixth embodiment
Fig. 6 A and Fig. 6 B are refer to, wherein Fig. 6 A are shown according to a kind of optical imagery of this utility model sixth embodiment
The schematic diagram of system, Fig. 6 B are followed successively by from left to right spherical aberration, astigmatism and the optical distortion of the optical imaging system of sixth embodiment
Curve chart.Fig. 6 C show the visible light spectrum modulation conversion characteristic pattern of the present embodiment.Fig. 6 D show this utility model the 6th
The central vision of the visible light spectrum of embodiment, 0.3 visual field, the out of focus modulation conversion contrast rate of transform figure of 0.7 visual field；Fig. 6 E show
Infrared spectral central vision, 0.3 visual field, the out of focus modulation conversion of 0.7 visual field of this utility model sixth embodiment are gone out
Contrast rate of transform figure.From Fig. 6 A, optical imaging system by thing side to image side include successively the first lens 610, aperture 600,
Second lens 620, the 3rd lens 630, the 4th lens 640, infrared fileter 670, imaging surface 680 and imageing sensor 690.
First lens 610 have a positive refracting power, and for plastic material, its thing side 612 is convex surface, and its image side surface 614 is
Concave surface, and aspheric surface is all, and its thing side 612 has a point of inflexion.
Second lens 620 have a positive refracting power, and for plastic material, its thing side 622 is convex surface, and its image side surface 624 is
Convex surface, and aspheric surface is all, and its thing side 622 has a point of inflexion.
3rd lens 630 have a positive refracting power, and for plastic material, its thing side 632 is concave surface, and its image side surface 634 is
Convex surface, and aspheric surface is all, and its thing side 632 has a point of inflexion.
4th lens 640 have a negative refracting power, and for plastic material, its thing side 642 is convex surface, and its image side surface 644 is
Concave surface, and aspheric surface is all, and its thing side 642 and image side surface 644 are respectively provided with a point of inflexion.
Infrared fileter 670 is glass material, and it is arranged between the 4th lens 640 and imaging surface 680 and does not affect optics
The focal length of imaging system.
In the optical imaging system of sixth embodiment, the first lens, the second lens and the 3rd lens are plus lens, its
Respective focal length is respectively f1 and f2 and f3, and the focal length summation of the lens of the positive refracting power of all tools is Σ PP, and it meets following
Condition：Σ PP=f1+f2+f3.Thereby, contribute to suitably distributing the positive refracting power of single lens to other plus lens, to suppress
The generation of the notable aberration of incident illumination traveling process.
In the optical imaging system of sixth embodiment, it is Σ NP that all tools bear the focal length summation of the lens of refracting power, and it is expired
Foot row condition：Σ NP=f4.
Please coordinate with reference to following table 11 and table 12.
The asphericity coefficients of table 12, sixth embodiment
In sixth embodiment, aspheric fitting equation represents the form such as first embodiment.Additionally, following table parameter
Definition is all identical with first embodiment, and not in this to go forth.
Following condition formulae numerical value is obtained according to table 11 and table 12：
Following condition formulae numerical value is obtained according to table 11 and table 12：
Although this utility model is disclosed above with embodiment, so it is not limited to this utility model, Ren Heben
Art personnel, in without departing from spirit and scope of the present utility model, when can be used for a variety of modifications and variations, therefore this reality
Worked as with new protection domain and be defined depending on the appended claims scope person of defining.
To be art although this utility model is particularly shown with reference to its exemplary embodiments and describes
Those of ordinary skill will be understood by, in without departing from this utility model defined in following claims scope and its equivalent
Spirit and scope under it can be carried out in form and details various changes.
Claims (25)
1. a kind of visible ray and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, it is characterised in that by thing side extremely
Image side includes successively：
One first lens, with refracting power；
One second lens, with refracting power；
One the 3rd lens, with refracting power；
One the 4th lens, with refracting power；
One first imaging surface, it is a specific visible ray image plane and its central vision perpendicular to optical axis in the first space frequency
The out of focus modulation conversion contrast rate of transform of rate has maximum；And
One second imaging surface, it is a specific infrared light image plane and its central vision perpendicular to optical axis in the first space frequency
The out of focus modulation conversion contrast rate of transform of rate has maximum, wherein the visible ray and the dual-purpose low focal plane side-play amount of infrared light
It is four pieces that optical imaging system has the lens of refracting power, at least one piece lens tool in first lens to the 4th lens
Have a positive refracting power, first lens to the focal length of the 4th lens are respectively f1, f2, f3, f4, the visible ray with it is infrared
The focal length of the dual-purpose low focal plane side-play amount optical imaging system of light is f, the visible ray and the dual-purpose low focal plane of infrared light
The entrance pupil diameter of side-play amount optical imaging system is HEP, and the first lens thing side to first imaging surface is in light
Have one on axle apart from HOS, the first lens thing side to the 4th lens image side surface has a distance on optical axis
InTL, the half of the maximum visual angle of the visible ray low focal plane side-play amount optical imaging system dual-purpose with infrared light is
HAF, the visible ray low focal plane side-play amount optical imaging system dual-purpose with infrared light is vertical on first imaging surface
There is a maximum image height HOI in optical axis, the distance between first imaging surface and second imaging surface on optical axis is
FS；First lens, second lens, the 3rd lens and the 4th lens in 1/2HEP height and parallel to
The thickness of optical axis is respectively ETP1, ETP2, ETP3 and ETP4, and the summation of aforementioned ETP1 to ETP4 is SETP, and described first is saturating
Mirror, second lens, the 3rd lens and the 4th lens in the thickness of optical axis be respectively TP1, TP2, TP3 and
The summation of TP4, aforementioned TP1 to TP4 is STP, and it meets following condition：1≦f/HEP≦10；0deg<HAF≦150deg；0.5
≦SETP/STP<1 and │ FS │≤30 μm.
2. visible ray as claimed in claim 1 and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, its feature
It is that the wavelength of the infrared light is represented between 700nm to 1000nm and first spatial frequency with SP1, under its satisfaction
Row condition：SP1≦440cycles/mm.
3. visible ray as claimed in claim 1 and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, its feature
Be, on the first lens thing side in 1/2HEP height coordinate points to the water between first imaging surface parallel to optical axis
Flat distance is ETL, on the first lens thing side in 1/2HEP height coordinate points to the 4th lens image side surface in
Horizontal range between the coordinate points of 1/2HEP height parallel to optical axis is EIN, and it meets following condition：0.2≦EIN/ETL<1.
4. visible ray as claimed in claim 1 and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, its feature
It is that the second lens image side surface and the 3rd lens image side surface are convex surface on optical axis.
5. visible ray as claimed in claim 1 and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, its feature
It is, the visible ray and the one of the maximum perpendicular visible angle of the dual-purpose low focal plane side-play amount optical imaging system of infrared light
Half is VHAF, and the visible ray meets following equation with the dual-purpose low focal plane side-play amount optical imaging system of infrared light：VHAF
≧10deg。
6. visible ray as claimed in claim 1 and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, its feature
Be that the first lens thing side to first imaging surface has one apart from HOS on optical axis, the visible ray with it is infrared
The dual-purpose low focal plane side-play amount optical imaging system of light has a maximum imaging on first imaging surface perpendicular to optical axis
Height HOI, the visible ray meets following condition with the dual-purpose low focal plane side-play amount optical imaging system of infrared light：HOS/
HOI≧1.2。
7. visible ray as claimed in claim 1 and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, its feature
Be, on the first lens thing side in 1/2HEP height coordinate points to high in 1/2HEP on the 4th lens image side surface
Horizontal range between the coordinate points of degree parallel to optical axis is EIN, and it meets following equation：0.3≦SETP/EIN<1.
8. visible ray as claimed in claim 1 and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, its feature
Be, on the 3rd lens image side surface in 1/2HEP height coordinate points to the water between first imaging surface parallel to optical axis
Flat distance is EBL, on the 4th lens image side surface with the intersection point of optical axis to first imaging surface parallel to optical axis level
Distance is BL, and it meets following equation：0.1≦EBL/BL≦1.5.
9. visible ray as claimed in claim 1 and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, its feature
It is that also including an aperture, and the aperture to first imaging surface has one apart from InS on optical axis, described first
Lens thing side to first imaging surface has one apart from HOS on optical axis, and it meets following equation：0.2≦InS/HOS≦
1.1。
10. a kind of visible ray and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, it is characterised in that by thing side extremely
Image side includes successively：
One first lens, with positive refracting power；
One second lens, with refracting power, its image side surface is convex surface on optical axis；
One the 3rd lens, with refracting power, its image side surface is convex surface on optical axis；
One the 4th lens, with refracting power；
One first imaging surface, it is a specific visible ray image plane and its central vision perpendicular to optical axis in the first space frequency
The out of focus modulation conversion contrast rate of transform of rate has maximum, and first spatial frequency is 220cycles/mm；And
One second imaging surface, it is a specific infrared light image plane perpendicular to optical axis and its central vision is empty in described first
Between frequency out of focus modulation conversion contrast the rate of transform have maximum, wherein the visible ray low focal plane dual-purpose with infrared light is inclined
It is four pieces that shifting amount optical imaging system has the lens of refracting power, and at least one piece thoroughly in second lens to the 4th lens
Mirror has a positive refracting power, and first lens to the focal length of the 4th lens are respectively f1, f2, f3, f4, the visible ray with
The focal length of the dual-purpose low focal plane side-play amount optical imaging system of infrared light is f, the visible ray and dual-purpose low Jiao of infrared light
The entrance pupil diameter of planar offset optical imaging system is HEP, and the first lens thing side is to first imaging surface
Have one apart from HOS on optical axis, the first lens thing side to the 4th lens image side surface have on optical axis one away from
From the half of the maximum visual angle of InTL, the visible ray and the dual-purpose low focal plane side-play amount optical imaging system of infrared light
For HAF, the visible ray hangs down with the dual-purpose low focal plane side-play amount optical imaging system of infrared light on first imaging surface
It is straight that there is a maximum image height HOI in optical axis, on the first lens thing side in 1/2HEP height coordinate points to described
Horizontal range between the first imaging surface parallel to optical axis is ETL, in the coordinate of 1/2HEP height on the first lens thing side
Horizontal range of the point to the 4th lens image side surface parallel to optical axis between the coordinate points of 1/2HEP height is EIN, described
Distance between the first imaging surface and second imaging surface on optical axis is FS, and it meets following condition：1≦f/HEP≦10；
0deg<HAF≦150deg；0.2≦EIN/ETL<1 and │ FS │≤30 μm.
11. visible rays as claimed in claim 10 and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, it is special
Levy and be, the visible ray hangs down with the dual-purpose low focal plane side-play amount optical imaging system of infrared light on first imaging surface
It is straight that there is a maximum image height HOI in optical axis, it is seen that optical axis, 0.3HOI and 0.7HOI of the light on first imaging surface
The numerical value of the three modulation conversions contrast rates of transform in spatial frequency 110cycles/mm respectively with MTFQ0, MTFQ3 and
MTFQ7 represents that it meets following condition：MTFQ0≧0.2；MTFQ3≧0.01；And MTFQ7≤0.01.
12. visible ray as claimed in claim 10 and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, it is special
Levy and be, the maximum perpendicular visible angle of the visible ray and the dual-purpose low focal plane side-play amount optical imaging system of infrared light
Half is VHAF, and the visible ray meets following equation with the dual-purpose low focal plane side-play amount optical imaging system of infrared light：
VHAF≧20deg。
13. visible rays as claimed in claim 10 and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, it is special
Levy and be, the first lens thing side to first imaging surface has one apart from HOS on optical axis, the visible ray with it is red
The dual-purpose low focal plane side-play amount optical imaging system of outer light has a most great achievement on first imaging surface perpendicular to optical axis
Image height degree HOI, the visible ray meets following condition with the dual-purpose low focal plane side-play amount optical imaging system of infrared light：HOS/
HOI≧1.4。
14. visible ray as claimed in claim 10 and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, it is special
Levy and be, on the 3rd lens image side surface in 1/2HEP height coordinate points to the 4th lens thing side in 1/2HEP
Horizontal range between the coordinate points of height parallel to optical axis is ED34, in optical axis between the 3rd lens and the 4th lens
On distance be IN34, it meets following condition：0<ED34/IN34≦50.
15. visible ray as claimed in claim 10 and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, it is special
Levy and be, on the first lens image side surface in 1/2HEP height coordinate points to the second lens thing side in 1/2HEP
Horizontal range between the coordinate points of height parallel to optical axis is ED12, in optical axis between first lens and second lens
On distance be IN12, it meets following condition：0<ED12/IN12≦35.
16. visible rays as claimed in claim 10 and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, it is special
Levy and be, second lens in 1/2HEP height and parallel to optical axis thickness be ETP2, second lens are on optical axis
Thickness be TP2, it meets following condition：0.1≦ETP2/TP2≦5.
17. visible rays as claimed in claim 10 and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, it is special
Levy and be, the 3rd lens in 1/2HEP height and parallel to optical axis thickness be ETP3, the 3rd lens are on optical axis
Thickness be TP3, it meets following condition：0.1≦ETP3/TP3≦5.
18. visible ray as claimed in claim 10 and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, it is special
Levy and be, the 4th lens in 1/2HEP height and parallel to optical axis thickness be ETP4, the 4th lens are on optical axis
Thickness be TP4, it meets following condition：0.1≦ETP4/TP4≦5.
19. visible rays as claimed in claim 10 and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, it is special
Levy and be, at least one piece lens are ripple in first lens, second lens, the 3rd lens and the 4th lens
The long light less than 500nm filters element.
A kind of 20. visible rays and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, it is characterised in that by thing side extremely
Image side includes successively：
One first lens, with positive refracting power；
One second lens, with refracting power, its image side surface is convex surface on optical axis；
One the 3rd lens, with refracting power, its image side surface is convex surface on optical axis；
One the 4th lens, with refracting power；
One first average imaging surface, its be a specific visible ray image plane perpendicular to optical axis and be arranged at the visible ray with
The central vision of the dual-purpose low focal plane side-play amount optical imaging system of infrared light, 0.3 visual field and 0.7 visual field are each empty in first
Between frequency have corresponding maximum defocus modulation conversion contrast transfer rate score out of focus position mean place, described first is empty
Between frequency be 220cycles/mm；And
One second average imaging surface, its be a specific infrared light image plane perpendicular to optical axis and be arranged at the visible ray with
The central vision of the dual-purpose low focal plane side-play amount optical imaging system of infrared light, 0.3 visual field and 0.7 visual field are each in described
One spatial frequency has the mean place of the out of focus position of corresponding maximum defocus modulation conversion contrast transfer rate score, wherein institute
State visible ray and the dual-purpose low focal plane side-play amount optical imaging system of infrared light to have the lens of refracting power is four pieces, described the
Three lens at least one piece lens in the 4th lens have positive refracting power, Jiao of first lens to the 4th lens
Away from respectively f1, f2, f3, f4, the focal length of the visible ray and the dual-purpose low focal plane side-play amount optical imaging system of infrared light
For f, the visible ray and the entrance pupil diameter of the dual-purpose low focal plane side-play amount optical imaging system of infrared light are HEP, institute
State the first lens thing side to the described first average imaging surface and have one on optical axis apart from HOS, the first lens thing side
Have one on optical axis apart from InTL to the 4th lens image side surface, the visible ray low focal plane dual-purpose with infrared light is inclined
The half of the maximum visual angle of shifting amount optical imaging system is HAF, and the visible ray low focal plane dual-purpose with infrared light is inclined
Shifting amount optical imaging system has a maximum image height HOI on the described first average imaging surface perpendicular to optical axis, and described the
On one lens thing side in 1/2HEP height coordinate points to the horizontal range between the described first average imaging surface parallel to optical axis
For ETL, on the first lens thing side in 1/2HEP height coordinate points to the 4th lens image side surface in 1/2HEP
Horizontal range between the coordinate points of height parallel to optical axis is EIN, the first average imaging surface and the described second average imaging
Distance between face is AFS；The maximum perpendicular of the visible ray and the dual-purpose low focal plane side-play amount optical imaging system of infrared light
The half of visible angle is VHAF, and it meets following condition：1≦f/HEP≦10；0deg<HAF≦150deg；│AFS│≦30μ
m；VHAF≤20deg and 0.2≤EIN/ETL<1.
21. visible rays as claimed in claim 20 and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, it is special
Levy and be, first lens in 1/2HEP height and parallel to optical axis thickness be ETP1, second lens are in 1/2HEP
The height and thickness parallel to optical axis is ETP2, the 3rd lens are in 1/2HEP height and thickness parallel to optical axis is
ETP3, the 4th lens are ETP4 in 1/2HEP height and parallel to the thickness of optical axis, and the summation of aforementioned ETP1 to ETP4 is
SETP, it meets following equation：0.3≦SETP/EIN<1.
22. visible rays as claimed in claim 20 and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, it is special
Levy and be, the first lens thing side to the described first average imaging surface has one apart from HOS on optical axis, the visible ray
The low focal plane side-play amount optical imaging system dual-purpose with infrared light has on the described first average imaging surface perpendicular to optical axis
One maximum image height HOI, the visible ray low focal plane side-play amount optical imaging system dual-purpose with infrared light meets following
Condition：HOS/HOI≧1.6.
23. visible rays as claimed in claim 20 and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, it is special
Levy and be, the visible ray and the dual-purpose low focal plane side-play amount optical imaging system of infrared light image in described second it is average into
The line amplification of image planes is LM, and it meets following condition：LM≧0.0003.
24. visible ray as claimed in claim 20 and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, it is special
Levy and be, the visible ray also includes an aperture, an image with the dual-purpose low focal plane side-play amount optical imaging system of infrared light
Sensor, described image sensor is arranged at after the described first average imaging surface and at least provided with 100,000 pixels, and institute
State aperture to the described first average imaging surface and have one on optical axis apart from InS, the first lens thing side to described first
Average imaging surface has one apart from HOS on optical axis, and it meets following equation：0.2≦InS/HOS≦1.1.
25. visible rays as claimed in claim 20 and the dual-purpose low focal plane side-play amount optical imaging system of infrared light, it is special
Levy and be, the visible ray also includes an aperture, an image with the dual-purpose low focal plane side-play amount optical imaging system of infrared light
Sensor and a drive module, described image sensor is arranged at after the described first average imaging surface and at least provided with 100,000
Individual pixel, and the aperture to the described first average imaging surface has one apart from InS on optical axis, the first lens thing side
Face to the described first average imaging surface has one apart from HOS on optical axis, and the drive module is coupled simultaneously with each lens
Each lens are made to produce displacement, it meets following equation：0.2≦InS/HOS≦1.1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW105210804 | 2016-07-18 | ||
| TW105210804U TWM547110U (en) | 2016-07-18 | 2016-07-18 | Optical image capturing system with low focal plane offset for visible light and IR light |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206178234U true CN206178234U (en) | 2017-05-17 |
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ID=58681538
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621199588.9U Active CN206178234U (en) | 2016-07-18 | 2016-11-07 | Low-focal-plane offset optical imaging system for visible light and infrared light |
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| Country | Link |
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| CN (1) | CN206178234U (en) |
| TW (1) | TWM547110U (en) |
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| CN108267839A (en) * | 2017-01-04 | 2018-07-10 | 先进光电科技股份有限公司 | Optical imaging system |
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| TWI635310B (en) * | 2016-07-18 | 2018-09-11 | 先進光電科技股份有限公司 | Optical image capturing system |
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| TWI679449B (en) | 2018-12-03 | 2019-12-11 | 大立光電股份有限公司 | Optical imaging lens assembly, image capturing unit and electronic device |
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2016
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- 2016-11-07 CN CN201621199588.9U patent/CN206178234U/en active Active
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| CN108267839A (en) * | 2017-01-04 | 2018-07-10 | 先进光电科技股份有限公司 | Optical imaging system |
| CN108267841A (en) * | 2017-01-04 | 2018-07-10 | 先进光电科技股份有限公司 | Optical imaging system |
| US10393998B2 (en) | 2017-01-04 | 2019-08-27 | Ability Opto-Electronics Technology Co. Ltd. | Optical image capturing system |
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| US10816765B2 (en) | 2018-02-08 | 2020-10-27 | Ability Opto-Electronics Technology Co. Ltd. | Six lens optical image capturing system having visible and infrared image planes |
| CN110426811A (en) * | 2018-05-01 | 2019-11-08 | 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 |
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