TWM596357U - Optical image capturing system - Google Patents

Abstract

The invention discloses a seven-piece optical lens for capturing image and a seven-piece optical module for capturing image. In order from an object side to an image side, the optical lens along the optical axis comprises a first lens with refractive power; a second lens with refractive power; a third lens with refractive power; a fourth lens with refractive power; a fifth lens with refractive power; a sixth lens with refractive power; and a seventh lens with refractive power;and at least one of the image-side surface and object-side surface of each of the seven lens elements is aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.

Description

Optical imaging system

This creation is about an optical imaging system group, and particularly about a miniaturized optical imaging system group applied to electronic products.

In recent years, with the rise of portable electronic products with photographic functions, the demand for optical systems has been increasing. The photosensitive element of the general optical system is nothing more than a photosensitive coupled device (Charge Coupled Device; CCD) or a complementary metal oxide semiconductor device (Complementary Metal-Oxide Semiconductor Sensor; CMOS Sensor), and with the advancement of semiconductor manufacturing technology, As a result, the pixel size of the photosensitive element is reduced, and the optical system is gradually developing in the field of high pixels, so the requirements for imaging quality are also increasing.

The traditional optical systems mounted on portable devices mostly use five-piece or six-piece lens structures. However, as portable devices continue to improve pixels and end consumers demand large apertures such as low light and night With the shooting function, the conventional optical imaging system has been unable to meet the higher-level photography requirements.

Therefore, how to effectively increase the light input of the optical imaging lens and further improve the imaging quality has become a very important issue.

The aspect of this creative embodiment is directed to an optical imaging system and an optical image capturing lens, which can use the combination of the refractive power of seven lenses, convex and concave surfaces (the convex or concave surface in this creation refers in principle to the object side of each lens) Or the description of the change of the geometric shape at different heights from the side of the optical axis, so as to effectively improve the light input of the optical imaging system and improve the imaging quality at the same time, so as to be applied to small electronic products.

The terms and code names of the lens parameters related to this creative example are listed in detail below as a reference for subsequent descriptions:

Lens parameters related to length or height

In this creation, the visible light spectrum can use the wavelength 555 nm as the main reference wavelength and a benchmark for measuring the focus shift, and the infrared light spectrum (700 nm to 1300 nm) can use the wavelength 940 nm as the main reference wavelength and the benchmark for measuring the focus shift.

The optical imaging system has an infrared imaging surface. The infrared imaging surface is a specific infrared light imaging plane perpendicular to the optical axis and its central field of view has the maximum defocus modulation conversion contrast transfer rate (MTF) at the first spatial frequency. value.

The maximum imaging height of the optical imaging system is expressed by HOI; the height of the optical imaging system is expressed by HOS; the distance between the object side of the first lens of the optical imaging system and the image side of the seventh lens is expressed by InTL; the fixed aperture of the optical imaging system ( Aperture) The distance between the infrared imaging surface is represented by InS; the distance between the first lens and the second lens of the optical imaging system is represented by IN12 (exemplified); the thickness of the first lens of the optical imaging system on the optical axis is represented by TP1 Show (exemplify).

Lens parameters related to materials The dispersion coefficient of the first lens of the optical imaging system is represented by NA1 (exemplified); the refraction law of the first lens is represented by Nd1 (exemplified).

Lens parameters related to viewing angle The angle of view is expressed in AF; half of the angle of view is expressed in HAF; the chief ray angle is expressed in MRA.

Lens parameters related to entrance and exit pupils The diameter of the entrance pupil of the optical imaging system is represented by HEP; the diameter of the exit pupil of the image side of the seventh lens is HXP; the maximum effective radius of any surface of a single lens refers to the maximum angle of view of the system. Surface intersection point (Effective Half Diameter; EHD), the vertical height between the intersection point and the optical axis. For example, the maximum effective radius of the object side of the first lens is represented by EHD11, and the maximum effective radius of the image side of the first lens is represented by EHD12. The maximum effective radius of the object side of the second lens is represented by EHD21, and the maximum effective radius of the image side of the second lens is represented by EHD22. The maximum effective radius of any surface of the remaining lenses in the optical imaging system can be expressed by analogy.

Parameters related to the arc length of lens surface and surface profile The length of the contour curve of the maximum effective radius of any surface of a single lens refers to the intersection of the surface of the lens and the optical axis of the associated optical imaging system as the starting point, from the starting point along the surface contour of the lens to its Up to the end of the maximum effective radius, the arc length between the aforementioned two points is the length of the contour curve of the maximum effective radius, and is expressed in ARS. For example, the length of the contour curve of the maximum effective radius of the object side of the first lens is represented by ARS11, and the length of the contour curve of the maximum effective radius of the image side of the first lens is represented by ARS12. The profile curve length of the maximum effective radius of the object side of the second lens is represented by ARS21, and the profile curve length of the maximum effective radius of the image side of the second lens is represented by ARS22. The length of the contour curve of the maximum effective radius of any surface of the remaining lenses in the optical imaging system can be expressed by analogy.

The length of the contour curve of the 1/2 entrance pupil diameter (HEP) of any surface of a single lens refers to the intersection of the surface of the lens and the optical axis of the associated optical imaging system as the starting point, and the starting point The surface profile of the lens is up to the coordinate point on the surface at a vertical height of 1/2 the entrance pupil diameter from the optical axis, and the arc length between the aforementioned two points is the length of the 1/2 entrance pupil diameter (HEP) profile curve, and ARE said. For example, the profile curve length of 1/2 entrance pupil diameter (HEP) on the object side of the first lens is represented by ARE11, and the profile curve length of 1/2 entrance pupil diameter (HEP) on the image side of the first lens is represented by ARE12. The profile curve length of the 1/2 entrance pupil diameter (HEP) on the object side of the second lens is represented by ARE21, and the profile curve length of the 1/2 entrance pupil diameter (HEP) on the image side of the second lens is represented by ARE22. The length of the profile curve of 1/2 entrance pupil diameter (HEP) of any surface of the remaining lens in the optical imaging system is expressed by the same way.

Parameters related to the depth of lens profile The intersection of the seventh lens object side on the optical axis and the end of the maximum effective radius of the seventh lens object side, the distance between the two points above the optical axis is expressed by InRS71 (maximum effective radius depth); seventh lens image side From the intersection point on the optical axis to the end of the maximum effective radius of the image side of the seventh lens, the distance between the two points above the optical axis is expressed by InRS72 (the maximum effective radius depth). The expression of the depth of the maximum effective radius (sinking amount) of the object side or image side of other lenses is the same as the above.

Parameters related to lens profile Critical point C refers to a point on a particular lens surface, except for the intersection with the optical axis, a tangent plane perpendicular to the optical axis. For example, the vertical distance between the critical point C51 on the side of the fifth lens object and the optical axis is HVT51 (exemplified), the vertical distance between the critical point C52 on the image side of the fifth lens and the optical axis is HVT52 (exemplified), and the sixth lens object The vertical distance between the critical point C61 on the side and the optical axis is HVT61 (illustrated), and the vertical distance between the critical point C62 on the image side of the sixth lens and the optical axis is HVT62 (illustrated). For other lenses such as the seventh lens, the critical point on the object side or the image side and the vertical distance from the optical axis are expressed in the same manner as described above.

The inflection point closest to the optical axis on the object side of the seventh lens is IF711, and the amount of depression at this point is SGI711 (example), which is the intersection of the object side of the seventh lens on the optical axis and the closest optical axis of the object side of the seventh lens The horizontal displacement distance between the inflection point and the optical axis is parallel, and the vertical distance between the point and the optical axis of IF711 is HIF711 (example). The inflection point closest to the optical axis on the image side of the seventh lens is IF721, the amount of depression at this point is SGI721 (example), and SGI711 is the intersection of the image side of the seventh lens on the optical axis and the closest optical axis of the image side of the seventh lens The horizontal displacement distance between the inflexion point and the optical axis is parallel, and the vertical distance between the point and the optical axis of IF721 is HIF721 (example).

The inflection point of the second lens object side near the optical axis on the seventh lens side is IF712, and the amount of depression at this point is SGI712 (example), which is the intersection point of the seventh lens object side on the optical axis to the second closest to the seventh lens object side The horizontal displacement distance between the reflex point of the optical axis and the optical axis is parallel. The vertical distance between this point and the optical axis of IF712 is HIF712 (illustrated). The inflection point of the second lens on the image side of the seventh lens near the optical axis is IF722, and the amount of depression at this point is SGI722 (example), which is the intersection of the image side of the seventh lens on the optical axis and the second closest to the image side of the seventh lens The horizontal displacement distance between the reflex point of the optical axis and the optical axis is parallel. The vertical distance between this point and the optical axis of IF722 is HIF722 (illustrated).

The third inflection point on the object side of the seventh lens close to the optical axis is IF713, and the amount of depression at this point is SGI713 (example), which is the intersection of the seventh lens object side on the optical axis to the third closest to the seventh lens object side The horizontal displacement distance between the reflex point of the optical axis and the optical axis is parallel, and the vertical distance between the point and the optical axis of IF713 is HIF713 (illustrated). The inflection point of the third near-optical axis on the image side of the seventh lens is IF723, and the amount of depression at this point is SGI723 (example), that is, the intersection of the seventh-lens image side on the optical axis and the third closest to the seventh lens image side The horizontal displacement distance between the reflex point of the optical axis and the optical axis is parallel. The vertical distance between this point and the optical axis is IF723 (illustrated).

The fourth inflection point on the object side of the seventh lens close to the optical axis is IF714, and the amount of depression at this point is SGI714 (example), which is the intersection of the seventh lens object side on the optical axis to the fourth closest to the seventh lens object side The horizontal displacement distance between the reflex point of the optical axis and the optical axis is parallel, and the vertical distance between the point and the optical axis of IF714 is HIF714 (illustrated). The fourth inflection point near the optical axis on the image side of the seventh lens is IF724, and the amount of depression at this point is SGI724 (example), that is, the intersection of the image side of the seventh lens on the optical axis and the fourth closest to the image side of the seventh lens The horizontal displacement distance between the reflex point of the optical axis and the optical axis is parallel. The vertical distance between this point and the optical axis is HIF724 (illustrated).

The expressions of the inflection points on the object side or image side of other lenses and their vertical distance from the optical axis or the amount of their sinking are the same as those described above.

Variables related to aberrations

The optical distortion of the optical imaging system (Optical Distortion) is expressed by ODT; the TV distortion (TV Distortion) is expressed by TDT, and it can be further limited to describe the degree of aberration shift between 50% and 100% of the field of view; spherical aberration The shift is expressed in DFS; the comet aberration offset is expressed in DFC.

The lateral aberration of the aperture edge is expressed as STA (STOP Transverse Aberration), to evaluate the performance of a specific optical imaging system. The tangential fan or sagittal fan can be used to calculate the lateral light of any field of view Aberration, especially the calculation of the longest operating wavelength (for example, wavelength of 940 NM or 960 NM) and the shortest operating wavelength (for example, wavelength of 840 NM or 850 NM) through the aperture edge lateral aberration size as a standard for excellent performance. The coordinate direction of the aforementioned meridian plane light fan can be further divided into a positive direction (upper light) and a negative direction (lower light). The longest operating wavelength passes through the lateral aberration of the aperture edge, which is defined as the imaging position of the longest operating wavelength incident through the aperture edge on the infrared light imaging surface at a specific field of view, which is in the infrared light with the reference wavelength chief ray (for example, the wavelength of 940 NM) The distance difference between the two imaging positions of the field of view on the imaging surface, the shortest working wavelength passes through the lateral aberration of the aperture edge, which is defined as the imaging position of the shortest working wavelength incident on the specific field of view on the infrared imaging surface through the aperture edge, The distance between the imaging position of the field of view on the infrared imaging surface of the reference wavelength chief ray on the infrared light imaging surface is excellent in evaluating the performance of the specific optical imaging system. The shortest and longest operating wavelength can be used to incident infrared imaging through the edge of the aperture The horizontal aberration of 0.7 field of view on the surface (that is, 0.7 imaging height HOI) is less than 100 microns (μm) as a verification method, and it can even be incident on the infrared light imaging surface with the shortest and longest working wavelength through the aperture edge. The lateral aberrations are all less than 80 microns (μm) as the inspection method. The optical imaging system has a maximum imaging height HOI perpendicular to the optical axis on the infrared imaging surface, and the longest operating wavelength of infrared light of the positive meridian light fan of the optical imaging system passes through the edge of the entrance pupil and is incident on the infrared imaging surface The lateral aberration at 0.7HOI is expressed by PLTA, and the shortest working wavelength of the infrared light of its positive meridian surface fan passes through the edge of the entrance pupil and is incident on the infrared imaging surface. The lateral aberration at 0.7HOI is expressed by PSTA, negative The longest operating wavelength of the infrared light of the meridian plane fan passes through the edge of the entrance pupil and is incident on the infrared light imaging surface. The lateral aberration at 0.7 HOI is expressed by NLTA, and the shortest operating wavelength of the infrared light of the negative meridian plane fan passes through the The lateral aberration of the entrance pupil edge and incident on the infrared light imaging surface at 0.7 HOI is represented by NSTA, and the longest operating wavelength of the infrared light of the sagittal fan passes through the entrance pupil edge and is incident on the infrared light imaging surface at 0.7 HOI The lateral aberration is represented by SLTA, and the shortest operating wavelength of the infrared light of the sagittal fan passes through the edge of the entrance pupil and is incident on the infrared imaging surface at 0.7 HOI. The lateral aberration is represented by SSTA.

This creation provides an optical imaging system in which the object lens or image side of the seventh lens is provided with a reflex point, which can effectively adjust the angle of incidence of each field of view on the seventh lens and correct the optical distortion and TV distortion. In addition, the surface of the seventh lens can have better optical path adjustment capability to improve imaging quality.

According to the present invention, an optical imaging system is provided, which includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an infrared imaging surface in order from the object side to the image side . Each of the first lens to the seventh lens has refractive power. The focal lengths of the first lens to the seventh lens are f1, f2, f3, f4, f5, f6, and f7, respectively, the focal length of the optical imaging system is f, and the entrance pupil diameter of the optical imaging system is HEP, the seventh The exit pupil diameter of the lens image side is HXP, the distance from the object side of the first lens to the imaging surface of the infrared light is a distance HOS on the optical axis, half of the maximum viewing angle of the optical imaging system is HAF, and the optical imaging system is located on the first An infrared imaging surface has a maximum imaging height HOI perpendicular to the optical axis. Half of the maximum viewing angle of the optical imaging system is HAF. The intersection of any surface of any of these lenses with the optical axis is the starting point, extending The contour of the surface is up to the coordinate point on the surface at a vertical height of 1/2 HXP from the optical axis. The length of the contour curve between the two points is ARE, which meets the following conditions: 0.5≦f/HEP≦1.8; 0 deg>HAF≦50 deg and 0.9≦2(ARE /HEP)≦2.0.

According to the present invention, an optical imaging system is further provided, which includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an infrared light in order from the object side to the image side Imaging surface. And at least one surface of at least one lens from the first lens to the seventh lens has at least one inflection point. The focal lengths of the first lens to the seventh lens are f1, f2, f3, f4, f5, f6, and f7, respectively, the focal length of the optical imaging system is f, and the entrance pupil diameter of the optical imaging system is HEP, the seventh The exit pupil diameter of the lens image side is HXP, the distance from the object side of the first lens to the imaging surface of infrared light is a distance HOS on the optical axis, and the distance from the object side of the first lens to the image side of the seventh lens is a distance on the optical axis InTL, half of the maximum viewing angle of the optical imaging system is HAF, the intersection of any surface of any of these lenses with the optical axis is the starting point, and the contour of the surface is extended until the surface is 1/2 away from the optical axis Up to the coordinate point at the vertical height of HXP, the length of the contour curve between the aforementioned two points is ARE, which meets the following conditions: 0.5≦f/HEP≦1.5; 0 deg>HAF≦50 deg and 0.9≦2(ARE /HEP) ≦2.0.

According to the present invention, an optical imaging system is further provided, which includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an infrared light in order from the object side to the image side Imaging surface. There are seven lenses with refractive power in the optical imaging system, and at least one surface of at least two of the first lens to the seventh lens has at least one inflection point. The optical imaging system has a maximum imaging height HOI perpendicular to the optical axis on the infrared imaging surface. Half of the maximum viewing angle of the optical imaging system is HAF, the optical imaging system has a maximum imaging height HOI perpendicular to the optical axis on the infrared imaging surface, the pupil diameter of the seventh lens image side is HXP, the lenses The intersection of any surface of any lens and the optical axis is the starting point, and the contour of the surface is extended until the coordinate point on the surface at a vertical height of 1/2 HXP from the optical axis. The length of the contour curve between the two points For ARE, it satisfies the following conditions: 0.5≦f/HEP≦1.3; 10 deg≦HAF≦50 deg; 0.9≦2 (ARE /HEP)≦2.0.

The length of the contour curve of any surface of a single lens within the maximum effective radius affects the ability of the surface to correct aberrations and optical path differences between light rays of various fields. The longer the length of the contour curve, the better the ability to correct aberrations, but at the same time It will increase the difficulty of manufacturing, so it is necessary to control the length of the contour curve of any surface of a single lens within the maximum effective radius, especially the length of the contour curve (ARS) and the surface within the maximum effective radius of the surface The proportional relationship between the thickness (TP) of the lens on the optical axis (ARS / TP). For example, the length of the contour curve of the maximum effective radius of the object side of the first lens is represented by ARS11, the thickness of the first lens on the optical axis is TP1, the ratio between the two is ARS11/TP1, and the maximum effective radius of the image side of the first lens is The length of the contour curve is represented by ARS12, and the ratio between it and TP1 is ARS12/TP1. The length of the profile curve of the maximum effective radius of the object side of the second lens is represented by ARS21, the thickness of the second lens on the optical axis is TP2, the ratio between the two is ARS21/TP2, and the profile of the maximum effective radius of the image side of the second lens The length of the curve is represented by ARS22, and the ratio between it and TP2 is ARS22/TP2. The proportional relationship between the length of the contour curve of the maximum effective radius of any surface of the remaining lenses in the optical imaging system and the thickness of the lens on the optical axis (TP) to which the surface belongs, and its representation is the same.

The length of the contour curve of any surface of a single lens in the height range of 1/2 entrance pupil diameter (HEP) particularly affects the ability of the surface to correct the aberration in the common area of the light field and the optical path difference between the light rays of each field The longer the contour curve length is, the better the ability to correct aberrations, but at the same time it will increase the difficulty of manufacturing. Therefore, it is necessary to control the contour of any surface of a single lens within the height of 1/2 entrance pupil diameter (HEP) Curve length, especially the proportional relationship between the length of the profile curve (ARE) in the height range of 1/2 the entrance pupil diameter (HEP) of the surface and the thickness (TP) of the lens on the optical axis to which the surface belongs (ARE) /TP). For example, the length of the profile curve of the 1/2 entrance pupil diameter (HEP) height of the object side of the first lens is represented by ARE11, the thickness of the first lens on the optical axis is TP1, the ratio between the two is ARE11 / TP1, the first transparent The length of the profile curve of the height of 1/2 entrance pupil diameter (HEP) on the side of the mirror image is represented by ARE12, and the ratio between it and TP1 is ARE12 / TP1. The length of the profile curve of the 1/2 entrance pupil diameter (HEP) height of the object side of the second lens is represented by ARE21, the thickness of the second lens on the optical axis is TP2, and the ratio between the two is ARE21 / TP2. The profile curve length of the side 1/2 entrance pupil diameter (HEP) height is represented by ARE22, and the ratio between it and TP2 is ARE22 / TP2. The ratio between the length of the contour curve of the height of 1/2 the entrance pupil diameter (HEP) of any surface of the other lenses in the optical imaging system and the thickness (TP) of the lens on the optical axis to which the surface belongs. And so on.

When │f1│>∣f7∣, the total height of the optical imaging system (HOS; Height of Optic System) can be properly shortened to achieve the purpose of miniaturization.

When │f2│+│f3│+│f4│+│f5│+∣f6│ and ∣f1│+∣f7│ meet the above conditions, at least one of the second lens to the sixth lens has a weak positive Refractive or weak negative refraction. The so-called weak refractive power means that the absolute value of the focal length of a particular lens is greater than 10. When at least one of the second lens to the sixth lens has a weak positive refractive power, it can effectively share the positive refractive power of the first lens and prevent unnecessary aberrations from appearing prematurely. At least one of the six lenses has a weak negative refractive power, and the aberration of the correction system can be fine-tuned.

In addition, the seventh lens may have negative refractive power, and its image side may be concave. In this way, it is beneficial to shorten the back focal length to maintain miniaturization. In addition, at least one surface of the seventh lens may have at least one inflection point, which can effectively suppress the angle of incidence of the off-axis field of view and further correct the aberration of the off-axis field of view.

An optical imaging system group including, in order from the object side to the image side, a refractive first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an infrared light Imaging surface. The optical imaging system may further include an image sensing element, which is disposed on the infrared imaging surface, and the imaging height approaches 3.91 mm in the following embodiments.

The optical imaging system can be designed using three infrared operating wavelengths, namely 850 nm, 940 nm, and 960 nm, of which 960 nm is the main reference wavelength and the main reference wavelength for extracting technical features.

The optical imaging system can be designed using three visible light working wavelengths, namely 486.1 nm, 587.5 nm, and 656.2 nm, of which 587.5 nm is the main reference wavelength and the main reference wavelength for extracting technical features. The optical imaging system can also be designed using five working wavelengths, namely 470 nm, 510 nm, 555 nm, 610 nm, and 650 nm, of which 555 nm is the main reference wavelength and is the reference wavelength that mainly extracts the technical characteristics of visible light.

The ratio of the focal length f of the optical imaging system to the focal length fp of each lens with positive refractive power PPR, the ratio of the focal length f of the optical imaging system to the focal length fn of each lens with negative refractive power NPR, all lenses with positive refractive power The sum of PPR is ΣPPR, and the sum of NPR of all lenses with negative refractive power is ΣNPR. It helps control the total refractive power and total length of the optical imaging system when the following conditions are met: 0.5≦ΣPPR/│ΣNPR│≦15, preferably Ground, the following conditions can be satisfied: 1≦ΣPPR/│ΣNPR│≦3.0.

The optical imaging system may further include an image sensing element, which is disposed on the infrared imaging surface. The half of the diagonal length of the effective sensing area of the image sensing element (that is, the imaging height or maximum image height of the optical imaging system) is HOI, and the distance from the object side of the first lens to the infrared imaging surface on the optical axis is HOS , Which satisfies the following conditions: HOS/HOI≦10; and 0.5≦HOS/f≦10. Preferably, the following conditions can be satisfied: 1≦HOS/HOI≦5; and 1≦HOS/f≦7. In this way, the miniaturization of the optical imaging system can be maintained for mounting on thin and light portable electronic products.

In addition, in the optical imaging system of the present invention, at least one aperture can be set according to requirements to reduce stray light and help improve image quality.

In the optical imaging system of this creation, the aperture configuration can be a front aperture or a center aperture, where the front aperture means the aperture is set between the subject and the first lens, and the center aperture means the aperture is set between the first lens and Between infrared imaging surfaces. If the aperture is the front aperture, the exit pupil of the optical imaging system and the infrared imaging surface can form a longer distance to accommodate more optical elements, and the efficiency of the image sensing element to receive images can be increased; if it is a central aperture It is helpful to expand the angle of view of the system, so that the optical imaging system has the advantage of a wide-angle lens. The distance from the aforementioned aperture to the side surface of the sixth lens image is InS, which satisfies the following condition: 0.2≦InS/HOS≦1.1. With this, it is possible to simultaneously maintain the miniaturization of the optical imaging system and the characteristics of having a wide angle.

In the optical imaging system of this creation, the distance between the object side of the first lens and the image side of the seventh lens is InTL, and the total thickness of all lenses with refractive power on the optical axis is ΣTP, which satisfies the following conditions: 0.1≦ΣTP/ InTL≦0.9. In this way, the contrast of system imaging and the yield of lens manufacturing can be taken into account at the same time, and an appropriate back focal length can be provided to accommodate other components.

The radius of curvature of the object side of the first lens is R1, and the radius of curvature of the image side of the first lens is R2, which satisfies the following condition: 0.001≦│R1/R2│≦20. In this way, the first lens has an appropriate positive refractive power strength to prevent the spherical aberration from increasing too fast. Preferably, the following condition can be satisfied: 0.01≦│R1/R2│>10.

The radius of curvature of the object side of the seventh lens is R13, and the radius of curvature of the image side of the seventh lens is R14, which satisfies the following conditions: -7>(R11-R12)/(R11+R12)>50. In this way, it is beneficial to correct the astigmatism generated by the optical imaging system.

The separation distance between the first lens and the second lens on the optical axis is IN12, which satisfies the following condition: IN12 / f ≦3.0. This helps to improve the chromatic aberration of the lens to improve its performance.

The separation distance between the sixth lens and the seventh lens on the optical axis is IN67, which satisfies the following condition: IN67 / f ≦0.8. This helps to improve the chromatic aberration of the lens to improve its performance.

The thickness of the first lens and the second lens on the optical axis are TP1 and TP2, respectively, which satisfy the following conditions: 0.1≦(TP1+IN12) / TP2≦10. In this way, it helps to control the sensitivity of optical imaging system manufacturing and improve its performance.

The thicknesses of the sixth lens and the seventh lens on the optical axis are TP6 and TP7, respectively. The separation distance between the two lenses on the optical axis is IN67, which satisfies the following conditions: 0.1≦(TP7+IN67) / TP6≦10. In this way, it helps to control the sensitivity of optical imaging system manufacturing and reduce the overall height of the system.

The thickness of the third lens, the fourth lens, and the fifth lens on the optical axis are TP3, TP4, and TP5, respectively. The distance between the third lens and the fourth lens on the optical axis is IN34, and the distance between the fourth lens and the fifth lens is The separation distance on the optical axis is IN45, and the distance between the object side of the first lens and the image side of the seventh lens is InTL, which satisfies the following condition: 0.1≦TP4 / (IN34+TP4+IN45) >1. In this way, it helps layer by layer to slightly correct the aberration generated by the incident light traveling process and reduce the total height of the system.

In the optical imaging system of this invention, the vertical distance between the critical point C71 of the seventh lens object side and the optical axis is HVT71, the vertical distance between the critical point C72 of the seventh lens image side and the optical axis is HVT72, and the seventh lens object side is The horizontal displacement distance from the intersection point on the optical axis to the critical point C71 at the optical axis is SGC71, and the horizontal displacement distance from the intersection point of the seventh lens image side on the optical axis to the critical point C72 at the optical axis is SGC72, which can satisfy the following conditions : 0 mm≦HVT71≦3 mm; 0 mm> HVT72≦6 mm; 0≦HVT71/HVT72; 0 mm≦∣SGC71∣≦0.5 mm; 0 mm>∣SGC72∣≦2 mm; and 0 >∣SGC72∣/ (∣SGC72∣+TP7)≦0.9. With this, the aberration of the off-axis field of view can be effectively corrected.

The optical imaging system of this creation meets the following conditions: 0.2≦HVT72/ HOI≦0.9. Preferably, the following condition can be satisfied: 0.3≦HVT72/ HOI≦0.8. This helps to correct the aberration of the peripheral field of view of the optical imaging system.

The optical imaging system of this creation meets the following conditions: 0≦HVT72/HOS≦0.5. Preferably, the following condition can be satisfied: 0.2≦HVT72/HOS≦0.45. This helps to correct the aberration of the peripheral field of view of the optical imaging system.

In the optical imaging system of the present invention, the horizontal displacement distance between the intersection point of the seventh lens object side on the optical axis and the reflex point of the closest optical axis of the seventh lens object side parallel to the optical axis is represented by SGI711, and the seventh lens image The horizontal displacement distance between the intersection point of the side on the optical axis and the reflex point of the closest optical axis of the seventh lens image side parallel to the optical axis is represented by SGI721, which satisfies the following conditions: 0> SGI711 /( SGI711+TP7)≦0.9 ; 0> SGI721 /( SGI721+TP7)≦0.9. Preferably, the following conditions can be satisfied: 0.1≦SGI711 /( SGI711+TP7)≦0.6; 0.1≦SGI721 /( SGI721+TP7)≦0.6.

The horizontal displacement distance between the intersection point of the seventh lens object side on the optical axis and the second lens object side reflexion point near the optical axis parallel to the optical axis is represented by SGI712, and the seventh lens image side on the optical axis The horizontal displacement distance between the intersection point and the reflex point near the optical axis of the seventh lens image side parallel to the optical axis is expressed by SGI722, which satisfies the following conditions: 0> SGI712/( SGI712+TP7)≦0.9; 0> SGI722 /( SGI722+TP7)≦0.9. Preferably, the following conditions can be satisfied: 0.1≦SGI712 /( SGI712+TP7)≦0.6; 0.1≦SGI722 /( SGI722+TP7)≦0.6.

The vertical distance between the reflex point of the closest optical axis of the seventh lens object side and the optical axis is represented by HIF711, the intersection point of the seventh lens image side on the optical axis to the reflex point and optical axis of the closest optical axis of the seventh lens image side The vertical distance between them is expressed by HIF721, which satisfies the following conditions: 0.001 mm≦│HIF711∣≦5 mm; 0.001 mm≦│HIF721∣≦5 mm. Preferably, the following conditions can be satisfied: 0.1 mm≦│HIF711∣≦3.5 mm; 1.5 mm≦│HIF721∣≦3.5 mm.

The vertical distance between the second reflex point near the optical axis of the seventh lens object side and the optical axis is represented by HIF712. The intersection point of the seventh lens image side on the optical axis to the second lens side reflex of the seventh lens image side The vertical distance between the point and the optical axis is expressed by HIF722, which satisfies the following conditions: 0.001 mm≦│HIF712∣≦5 mm; 0.001 mm≦│HIF722∣≦5 mm. Preferably, the following conditions can be satisfied: 0.1 mm≦│HIF722∣≦3.5 mm; 0.1 mm≦│HIF712∣≦3.5 mm.

The vertical distance between the third reflex point near the optical axis of the seventh lens object side and the optical axis is represented by HIF713. The intersection point of the seventh lens image side on the optical axis to the third lens side reflex of the seventh lens image side The vertical distance between the point and the optical axis is expressed by HIF723, which meets the following conditions: 0.001 mm≦│HIF713∣≦5 mm; 0.001 mm≦│HIF723∣≦5 mm. Preferably, the following conditions can be satisfied: 0.1 mm≦│HIF723∣≦3.5 mm; 0.1 mm≦│HIF713∣≦3.5 mm.

The vertical distance between the fourth reflex point near the optical axis of the seventh lens object side and the optical axis is represented by HIF714, and the intersection point of the seventh lens image side on the optical axis to the fourth near optical axis recurve of the seventh lens image side The vertical distance between the point and the optical axis is represented by HIF724, which satisfies the following conditions: 0.001 mm≦│HIF714∣≦5 mm; 0.001 mm≦│HIF724∣≦5 mm. Preferably, the following conditions can be satisfied: 0.1 mm≦│HIF724∣≦3.5 mm; 0.1 mm≦│HIF714∣≦3.5 mm.

An embodiment of the optical imaging system of the present invention can help to correct the chromatic aberration of the optical imaging system by staggering the lenses with high and low dispersion coefficients.

The above equation of aspheric surface is: z=ch ² /[1+[1-(k+1)c ² h ² ] ^0.5 ]+A4h ⁴ +A6h ⁶ +A8h ⁸ +A10h ¹⁰ +A12h ¹² +A14h ¹⁴ + A16h ¹⁶ +A18h ¹⁸ +A20h ²⁰ +… (1) where z is the position value along the optical axis at the height h with the surface vertex as a reference, k is the cone coefficient, and c is the reciprocal of the radius of curvature, and A4, A6, A8, A10, A12, A14, A16, A18 and A20 are high-order aspheric coefficients.

In the optical imaging system provided by this creation, the lens can be made of plastic or glass. When the lens material is plastic, it can effectively reduce the production cost and weight. In addition, when the material of the lens is glass, the thermal effect can be controlled and the design space for the configuration of the refractive power of the optical imaging system can be increased. In addition, the object side and the image side of the first lens to the seventh lens in the optical imaging system can be aspherical, which can obtain more control variables, in addition to reducing aberrations, compared with the use of traditional glass lenses or even The number of lenses used can be reduced, so the total height of the original optical imaging system can be effectively reduced.

Furthermore, in the optical imaging system provided by this work, if the lens surface is convex, in principle, the lens surface is convex at the low optical axis; if the lens surface is concave, in principle, the lens surface is at the low optical axis. Concave.

The optical imaging system of this creation can be applied to the mobile focusing optical system according to the visual demand, and has the characteristics of excellent aberration correction and good imaging quality, thereby expanding the application level.

The more visible requirements of the optical imaging system of the present invention include a driving module, which can be coupled with the lenses and displace the lenses. The aforementioned driving module may be a voice coil motor (VCM) for driving the lens to focus, or an optical anti-shake element (OIS) for reducing the frequency of out-of-focus caused by lens vibration during the shooting process.

The optical imaging system of the present invention can make at least one of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens a light filtering element with a wavelength less than 500 nm according to the demand It can be achieved by coating a film on at least one surface of the specific lens with filtering function or the lens itself is made of a material with filtering short wavelength.

The infrared imaging surface of the optical imaging system of this creation can be selected as a flat surface or a curved surface according to the demand. When the infrared imaging surface is a curved surface (such as a spherical surface with a radius of curvature), it helps to reduce the angle of incidence required to focus light on the infrared imaging surface, in addition to helping to achieve the length of the miniature optical imaging system (TTL) , At the same time help to increase the relative illumination.

The optical imaging system of this creation can be applied to the acquisition of stereoscopic images. By projecting light with specific characteristics onto the object, after being reflected on the surface of the object, it is received by the lens and calculated and analyzed to obtain the distance between each position of the object and the lens. Then determine the information of the stereoscopic image. Most of the projected light uses infrared rays of a specific wavelength band to reduce interference, thereby achieving more accurate measurement. The aforementioned 3D sensing method for capturing a stereoscopic image may use time-of-flight (TOF) or structured light technologies, but is not limited thereto.

According to the above-mentioned embodiments, specific examples are presented below and explained in detail in conjunction with the drawings.

First embodiment

Please refer to FIGS. 1A and 1B, in which FIG. 1A shows a schematic diagram of an optical imaging system according to the first embodiment of the present creation, and FIG. 1B is from left to right in order for the optical imaging system of the first embodiment. Graph of spherical aberration, astigmatism and optical distortion. FIG. 1C is a lateral aberration diagram of the meridional plane fan and the sagittal plane fan of the optical imaging system of the first embodiment, with the longest operating wavelength and the shortest operating wavelength passing through the aperture edge at the 0.7 field of view. As can be seen from FIG. 1A, the optical imaging system includes a first lens 110, an aperture 100, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, and a sixth lens 160 in order from the object side to the image side And a seventh lens 170, an infrared filter 180, an infrared imaging surface 190, and an image sensing element 192.

The first lens 110 has negative refractive power and is made of plastic material. Its object side 112 is concave, its image side 114 is concave, and both are aspherical, and its object side 112 has an inflexion point and the image side 114 has two Recurve point. The profile curve length of the maximum effective radius of the object side of the first lens is represented by ARS11, and the profile curve length of the maximum effective radius of the image side of the first lens is represented by ARS12. The profile curve length of the 1/2 entrance pupil diameter (HEP) on the object side of the first lens is represented by ARE11, and the profile curve length of the 1/2 entrance pupil diameter (HEP) on the image side of the first lens is represented by ARE12. The thickness of the first lens on the optical axis is TP1.

The horizontal displacement distance between the intersection point of the first lens object side on the optical axis and the reflex point of the closest optical axis of the first lens object side parallel to the optical axis is represented by SGI111, and the intersection point of the first lens image side on the optical axis to The horizontal displacement distance between the reflex points of the closest optical axis of the image side of the first lens parallel to the optical axis is represented by SGI121, which satisfies the following conditions: SGI111= -0.1110 mm; SGI121=2.7120 mm; TP1=2.2761 mm; ∣SGI111∣ /(∣SGI111∣+TP1)= 0.0465; ∣SGI121∣/(∣SGI121∣+TP1)= 0.5437.

The horizontal displacement distance between the intersection point of the first lens object side on the optical axis and the second lens object side's inflection point near the optical axis parallel to the optical axis is represented by SGI112. The image side of the first lens on the optical axis The horizontal displacement distance between the intersection point and the reflex point near the optical axis of the first lens image side parallel to the optical axis is expressed as SGI122, which satisfies the following conditions: SGI112=0 mm; SGI122=4.2315 mm; ∣SGI112∣/( ∣SGI112∣+TP1)= 0; ∣SGI122∣/(∣SGI122∣+TP1)= 0.6502.

The vertical distance between the reflex point of the closest optical axis of the object side of the first lens and the optical axis is represented by HIF111, the intersection point of the image side of the first lens on the optical axis to the reflex point and optical axis of the closest optical axis of the image side of the first lens The vertical distance between them is expressed by HIF121, which satisfies the following conditions: HIF111=12.8432 mm; HIF111/ HOI=1.7127; HIF121=7.1744 mm; HIF121/ HOI=0.9567.

The vertical distance between the second inverse curvature point of the object side of the first lens and the optical axis is represented by HIF112. The intersection point of the image side of the first lens on the optical axis to the inverse of the second closest to the optical axis of the image side of the first lens The vertical distance between the curve point and the optical axis is represented by HIF122, which meets the following conditions: HIF112=0 mm; HIF112/ HOI=0; HIF122=9.8592 mm; HIF122/ HOI=1.3147.

The second lens 120 has positive refractive power and is made of plastic material. Its object side 122 is convex, and its image side 124 is concave, and both are aspherical. The profile curve length of the maximum effective radius of the object side of the second lens is represented by ARS21, and the profile curve length of the maximum effective radius of the image side of the second lens is represented by ARS22. The profile curve length of the 1/2 entrance pupil diameter (HEP) on the object side of the second lens is represented by ARE21, and the profile curve length of the 1/2 entrance pupil diameter (HEP) on the image side of the second lens is represented by ARE22. The thickness of the second lens on the optical axis is TP2.

The horizontal displacement distance between the intersection point of the second lens object side on the optical axis and the reflex point of the closest optical axis of the second lens object side parallel to the optical axis is represented by SGI211, and the intersection point of the second lens image side on the optical axis to The horizontal displacement distance between the reflex point of the closest optical axis of the image side of the second lens and the optical axis is represented by SGI221.

The vertical distance between the reflex point of the closest optical axis of the object side of the second lens and the optical axis is represented by HIF211, the intersection point of the image side of the second lens on the optical axis to the reflex point and optical axis of the closest optical axis of the image side of the second lens The vertical distance between them is expressed by HIF221.

The third lens 130 has negative refractive power and is made of plastic material. Its object side 132 is convex, and its image side 134 is concave, and both are aspherical. The profile curve length of the maximum effective radius of the third lens object side is represented by ARS31, and the profile curve length of the maximum effective radius of the third lens image side is represented by ARS32. The profile curve length of the 1/2 entrance pupil diameter (HEP) on the object side of the third lens is represented by ARE31, and the profile curve length of the 1/2 entrance pupil diameter (HEP) on the image side of the third lens is represented by ARE32. The thickness of the third lens on the optical axis is TP3.

The horizontal displacement distance between the intersection point of the third lens object side on the optical axis and the reflex point of the closest optical axis of the third lens object side parallel to the optical axis is represented by SGI311, and the intersection point of the third lens image side on the optical axis to The horizontal displacement distance between the reflex point of the closest optical axis of the third lens image side and the optical axis is represented by SGI321.

The horizontal displacement distance between the intersection point of the third lens object side on the optical axis and the second lens object side's inflection point near the optical axis parallel to the optical axis is represented by SGI312, and the third lens image side on the optical axis The horizontal displacement distance parallel to the optical axis between the intersection point and the second lens-side reflex point near the optical axis of the third lens image is represented by SGI322.

The vertical distance between the reflex point of the closest optical axis of the object side of the third lens and the optical axis is represented by HIF311, and the intersection point of the image side of the third lens on the optical axis to the reflex point and optical axis of the closest optical axis of the third lens image side The vertical distance between them is expressed by HIF321.

The vertical distance between the second reflex point near the optical axis of the third lens object side and the optical axis is represented by HIF312, and the intersection point of the third lens image side on the optical axis to the second lens side reflex of the third lens image side The vertical distance between the point and the optical axis is represented by HIF322.

The fourth lens 140 has a positive refractive power and is made of plastic material. Its object side 142 is convex, its image side 144 is convex, and both are aspherical, and its object side 142 has an inflection point. The length of the contour curve of the maximum effective radius of the fourth lens object side is represented by ARS41, and the length of the contour curve of the maximum effective radius of the fourth lens image side is represented by ARS42. The profile curve length of the 1/2 entrance pupil diameter (HEP) on the object side of the fourth lens is represented by ARE41, and the profile curve length of the 1/2 entrance pupil diameter (HEP) on the image side of the fourth lens is represented by ARE42. The thickness of the fourth lens on the optical axis is TP4.

The horizontal displacement distance between the intersection point of the fourth lens object side on the optical axis and the reflex point of the closest optical axis of the fourth lens object side parallel to the optical axis is represented by SGI411, and the intersection point of the fourth lens image side on the optical axis to The horizontal displacement distance between the reflex points of the closest optical axis of the fourth lens image side and the optical axis is expressed as SGI421, which satisfies the following conditions: SGI411=0.0018 mm; ∣SGI411∣/(∣SGI411∣+TP4)= 0.0009.

The horizontal displacement distance between the intersection point of the fourth lens object side on the optical axis and the second lens object side deflector point close to the optical axis parallel to the optical axis is represented by SGI412, and the fourth lens image side on the optical axis The horizontal displacement distance parallel to the optical axis between the intersection point and the second lens-side reflex point near the optical axis of the fourth lens is represented by SGI422.

The vertical distance between the reflex point of the closest optical axis of the fourth lens object side and the optical axis is represented by HIF411, the intersection point of the fourth lens image side on the optical axis to the reflex point and optical axis of the closest optical axis of the fourth lens image side The vertical distance between them is expressed by HIF421, which satisfies the following conditions: HIF411= 0.7191 mm; HIF411/ HOI=0.0959.

The vertical distance between the second reflex point near the optical axis of the fourth lens object side and the optical axis is represented by HIF412, and the intersection point of the fourth lens image side on the optical axis to the second lens side reflex of the fourth lens image side The vertical distance between the point and the optical axis is represented by HIF422.

The fifth lens 150 has positive refractive power and is made of plastic material. Its object side 152 is concave, its image side 154 is convex, and both are aspherical, and its object side 152 and image side 154 both have an inflection point. The profile curve length of the maximum effective radius of the fifth lens object side is represented by ARS51, and the profile curve length of the maximum effective radius of the fifth lens image side is represented by ARS52. The profile curve length of the 1/2 entrance pupil diameter (HEP) on the object side of the fifth lens is represented by ARE51, and the profile curve length of the 1/2 entrance pupil diameter (HEP) on the image side of the fifth lens is represented by ARE52. The thickness of the fifth lens on the optical axis is TP5.

The horizontal displacement distance between the intersection of the fifth lens object side on the optical axis and the reflex point of the closest optical axis of the fifth lens object side parallel to the optical axis is represented by SGI511, and the intersection point of the fifth lens image side on the optical axis to The horizontal displacement distance between the reflex point of the closest optical axis of the fifth lens image side and the optical axis is expressed by SGI521, which satisfies the following conditions: SGI511= -0.1246 mm; SGI521= -2.1477 mm; ∣SGI511∣/(∣SGI511 ∣+TP5)= 0.0284; ∣SGI521∣/(∣SGI521∣+TP5)= 0.3346.

The horizontal displacement distance between the intersection point of the fifth lens object side on the optical axis and the reflex point of the second lens object side near the optical axis parallel to the optical axis is expressed by SGI512. The image side of the fifth lens on the optical axis The horizontal displacement distance between the intersection point and the inflection point of the fifth lens image side near the optical axis, which is parallel to the optical axis, is represented by SGI522.

The vertical distance between the reflex point of the closest optical axis of the fifth lens object side and the optical axis is represented by HIF511, and the vertical distance between the reflex point of the closest optical axis of the fifth lens image side and the optical axis is represented by HIF521, which satisfies the following conditions : HIF511= 3.8179 mm; HIF521=4.5480 mm; HIF511/ HOI= 0.5091; HIF521/ HOI=0.6065.

The vertical distance between the second reflex point near the optical axis of the fifth lens object side and the optical axis is represented by HIF512, and the vertical distance between the second reflex point near the optical axis of the fifth lens image side and the optical axis is represented by HIF522.

The sixth lens 160 has negative refractive power and is made of plastic material. Its object side 162 is convex, its image side 164 is concave, and its object side 162 and image side 164 both have an inflection point. In this way, the angle at which each field of view is incident on the sixth lens can be effectively adjusted to improve aberrations. The profile curve length of the maximum effective radius of the sixth lens object side is represented by ARS61, and the profile curve length of the maximum effective radius of the sixth lens image side is represented by ARS62. The profile curve length of the 1/2 entrance pupil diameter (HEP) on the object side of the sixth lens is represented by ARE61, and the profile curve length of the 1/2 entrance pupil diameter (HEP) on the image side of the sixth lens is represented by ARE62. The thickness of the sixth lens on the optical axis is TP6.

The horizontal displacement distance between the intersection point of the sixth lens object side on the optical axis and the reflex point of the closest optical axis of the sixth lens object side parallel to the optical axis is represented by SGI611, and the intersection point of the sixth lens image side on the optical axis to The horizontal displacement distance between the reflex point of the closest optical axis of the sixth lens image side and the optical axis is expressed by SGI621, which satisfies the following conditions: SGI611= 0.3208 mm; SGI621=0.5937 mm; ∣SGI611∣/(∣SGI611∣+ TP6) = 0.5167; ∣SGI621∣/(∣SGI621∣+TP6) = 0.6643.

The vertical distance between the reflex point of the closest optical axis of the sixth lens object side and the optical axis is represented by HIF611, and the vertical distance between the reflex point of the closest optical axis of the sixth lens image side and the optical axis is represented by HIF621, which satisfies the following conditions : HIF611= 1.9655 mm; HIF621=2.0041 mm; HIF611/ HOI= 0.2621; HIF621/ HOI=0.2672.

The seventh lens 170 has positive refractive power and is made of plastic material. Its object side 172 is convex and its image side 174 is concave. In this way, it is beneficial to shorten the back focal length to maintain miniaturization. In addition, both the object side 172 and the image side 174 have an inflection point. The profile curve length of the maximum effective radius of the seventh lens object side is represented by ARS71, and the profile curve length of the maximum effective radius of the seventh lens image side is represented by ARS72. The profile curve length of the 1/2 entrance pupil diameter (HEP) on the object side of the seventh lens is represented by ARE71, and the profile curve length of the 1/2 entrance pupil diameter (HEP) on the image side of the seventh lens is represented by ARE72. The thickness of the seventh lens on the optical axis is TP7.

The horizontal displacement distance between the intersection point of the seventh lens object side on the optical axis and the reflex point of the closest optical axis of the seventh lens object side parallel to the optical axis is represented by SGI711, and the intersection point of the seventh lens image side on the optical axis to The horizontal displacement distance between the reflex point of the closest optical axis of the seventh lens image side and the optical axis is represented by SGI721, which satisfies the following conditions: SGI711= 0.5212 mm; SGI721=0.5668 mm; ∣SGI711∣/(∣SGI711∣+ TP7)= 0.3179; ∣SGI721∣/(∣SGI721∣+TP7)= 0.3364.

The vertical distance between the reflex point of the closest optical axis of the seventh lens object side and the optical axis is represented by HIF711, and the vertical distance between the reflex point of the closest optical axis of the seventh lens image side and the optical axis is represented by HIF721, which satisfies the following conditions : HIF711= 1.6707 mm; HIF721= 1.8616 mm; HIF711/ HOI=0.2228; HIF721/ HOI=0.2482.

The following description of this embodiment and the characteristics related to the inflection point are based on the main reference wavelength of 555 nm.

The infrared filter 180 is made of glass, which is disposed between the seventh lens 170 and the infrared imaging surface 190 and does not affect the focal length of the optical imaging system.

In the optical imaging system of this embodiment, the focal length of the optical imaging system is f, the diameter of the entrance pupil of the optical imaging system is HEP, and half of the maximum angle of view in the optical imaging system is HAF. The values are as follows: f=4.3019 mm; f/HEP =1.2; and HAF=59.9968 degrees and tan(HAF)=1.7318.

In the optical imaging system of this embodiment, the focal length of the first lens 110 is f1, and the focal length of the seventh lens 170 is f7, which satisfies the following conditions: f1=-14.5286 mm; ∣f/f1│= 0.2961; f7= 8.2933; │f1│>f7; and ∣f1/f7│= 1.7519.

In the optical imaging system of this embodiment, the focal lengths of the second lens 120 to the sixth lens 160 are f2, f3, f4, f5, and f6, respectively, which satisfy the following conditions: │f2│+│f3│+│f4│+│ f5│+∣f6│= 144.7494; ∣f1│+∣f7│= 22.8219 and │f2│+│f3│+│f4│+│f5│+∣f6│>∣f1│+∣f7│.

The ratio PPR of the focal length f of the optical imaging system to the focal length fp of each lens with positive refractive power, the ratio NPR of the focal length f of the optical imaging system to the focal length fn of each lens with negative refractive power, optical imaging in this embodiment In the system, the total PPR of all lenses with positive refractive power is ΣPPR=f/f2+f/f4+f/f5+f/f7= 1.7384, and the total NPR of all lenses with negative refractive power is ΣNPR= f/f1+f /f3+f/f6=-0.9999, ΣPPR/│ΣNPR│= 1.7386. At the same time, the following conditions are also met: ∣f/f2│= 0.1774; ∣f/f3│=0.0443; ∣f/f4│=0.4411; ∣f/f5│=0.6012; ∣f/f6│=0.6595; ∣f/f7 │=0.5187.

In the optical imaging system of this embodiment, the distance between the first lens object side 112 to the seventh lens image side 174 is InTL, the distance between the first lens object side 112 to the infrared light imaging surface 190 is HOS, and the aperture 100 to infrared The distance between the optical imaging surface 190 is InS, the half of the diagonal length of the effective sensing area of the image sensing element 192 is HOI, and the distance between the seventh lens image side 174 and the infrared imaging surface 190 is BFL, which satisfies the following conditions : InTL+BFL=HOS; HOS= 26.9789 mm; HOI= 7.5 mm; HOS/HOI= 3.5977; HOS/f= 6.2715; InS=12.4615 mm; and InS/HOS= 0.4619.

In the optical imaging system of this embodiment, the total thickness of all lenses with refractive power on the optical axis is ΣTP, which satisfies the following conditions: ΣTP = 16.0446 mm; and ΣTP/InTL = 0.6559. In this way, the contrast of system imaging and the yield of lens manufacturing can be taken into account at the same time, and an appropriate back focal length can be provided to accommodate other components.

In the optical imaging system of this embodiment, the radius of curvature of the object side 112 of the first lens is R1, and the radius of curvature of the image side 114 of the first lens is R2, which satisfies the following conditions: │R1/R2│= 129.9952. In this way, the first lens has an appropriate positive refractive power strength to prevent the spherical aberration from increasing too fast.

In the optical imaging system of this embodiment, the curvature radius of the seventh lens object side 172 is R13, and the curvature radius of the seventh lens image side 174 is R14, which satisfies the following conditions: (R13-R14)/(R13+R14)= -0.0806. In this way, it is beneficial to correct the astigmatism generated by the optical imaging system.

In the optical imaging system of this embodiment, the total focal length of all lenses with positive refractive power is ΣPP, which meets the following conditions: ΣPP = f2+f4+f5+f7= 49.4535 mm; and f4/ (f2+f4+f5+ f7) = 0.1972. In this way, it is helpful to appropriately distribute the positive refractive power of the fourth lens 140 to other positive lenses, so as to suppress the generation of significant aberrations in the course of the incident light.

In the optical imaging system of this embodiment, the total focal length of all lenses with negative refractive power is ΣNP, which satisfies the following conditions: ΣNP=f1+f3+f6= -118.1178 mm; and f1/ (f1+f3+f6)= 0.1677. In this way, it helps to properly distribute the negative refractive power of the first lens to other negative lenses, so as to suppress the generation of significant aberrations in the process of the incident light traveling.

In the optical imaging system of this embodiment, the separation distance between the first lens 110 and the second lens 120 on the optical axis is IN12, which satisfies the following conditions: IN12 = 4.5524 mm; IN12 / f = 1.0582. This helps to improve the chromatic aberration of the lens to improve its performance.

In the optical imaging system of this embodiment, the thicknesses of the first lens 110 and the second lens 120 on the optical axis are TP1 and TP2, respectively, which satisfy the following conditions: TP1 = 2.2761 mm; TP2 = 0.2398 mm; and (TP1+IN12) / TP2 = 1.3032. In this way, it helps to control the sensitivity of optical imaging system manufacturing and improve its performance.

In the optical imaging system of this embodiment, the thicknesses of the sixth lens 160 and the seventh lens 170 on the optical axis are TP6 and TP7, respectively, and the separation distance between the two lenses on the optical axis is IN67, which satisfies the following conditions: TP6= 0.3000 mm; TP7= 1.1182 mm; and (TP7+IN67) / TP6= 4.4322. In this way, it helps to control the sensitivity of optical imaging system manufacturing and reduce the overall height of the system.

In the optical imaging system of this embodiment, the thicknesses of the third lens 130, the fourth lens 140, and the fifth lens 150 on the optical axis are TP3, TP4, and TP5, respectively, and the third lens 130 and the fourth lens 140 are on the optical axis. The separation distance is IN34, the separation distance between the fourth lens 140 and the fifth lens 150 on the optical axis is IN45, and the distance between the first lens object side 112 and the seventh lens image side 174 is InTL, which satisfies the following conditions: TP3 = 0.8369 mm; TP4=2.0022 mm; TP5=4.2706 mm; IN34= 1.9268 mm; IN45= 1.5153 mm; and TP4 / (IN34+TP4+IN45)= 0.3678. In this way, it helps to slightly correct the aberrations generated by the incident light traveling and reduce the total height of the system.

In the optical imaging system of this embodiment, the horizontal displacement distance from the intersection of the sixth lens object side 162 on the optical axis to the maximum effective radius position of the sixth lens object side 162 on the optical axis is InRS61, and the sixth lens image side 164 is The horizontal displacement distance from the intersection point on the optical axis to the maximum effective radius of the image side 164 of the sixth lens on the optical axis is InRS62, and the thickness of the sixth lens 160 on the optical axis is TP6, which satisfies the following conditions: InRS61= -0.7823 mm ; InRS62 = -0.2166 mm; and │InRS62∣/ TP6 = 0.722. In this way, it is conducive to the production and molding of the lens and effectively maintains its miniaturization.

In the optical imaging system of this embodiment, the vertical distance between the critical point of the sixth lens object side 162 and the optical axis is HVT61, and the vertical distance between the critical point of the sixth lens image side 164 and the optical axis is HVT62, which satisfies the following conditions: HVT61=3.3498 mm; HVT62=3.9860 mm; and HVT61/HVT62=0.8404.

In the optical imaging system of this embodiment, the horizontal displacement distance from the intersection point of the seventh lens object side 172 on the optical axis to the maximum effective radius position of the seventh lens object side 172 on the optical axis is InRS71, and the seventh lens image side 174 is The horizontal displacement distance from the intersection point on the optical axis to the maximum effective radius of the seventh lens image side 174 on the optical axis is InRS72, and the thickness of the seventh lens 170 on the optical axis is TP7, which satisfies the following conditions: InRS71= -0.2756 mm ; InRS72= -0.0938 mm; and │InRS72∣/ TP7= 0.0839. In this way, it is conducive to the production and molding of the lens and effectively maintains its miniaturization.

In the optical imaging system of this embodiment, the vertical distance between the critical point of the seventh lens object side 172 and the optical axis is HVT71, and the vertical distance between the critical point of the seventh lens image side 174 and the optical axis is HVT72, which satisfies the following conditions: HVT71=3.6822 mm; HVT72= 4.0606 mm; and HVT71/HVT72=0.9068. With this, the aberration of the off-axis field of view can be effectively corrected.

In the optical imaging system of this embodiment, it satisfies the following condition: HVT72/HOI = 0.5414. This helps to correct the aberration of the peripheral field of view of the optical imaging system.

In the optical imaging system of this embodiment, it satisfies the following conditions: HVT72/HOS = 0.1505. This helps to correct the aberration of the peripheral field of view of the optical imaging system.

In the optical imaging system of this embodiment, the second lens, the third lens, and the seventh lens have negative refractive power, the second lens has a dispersion coefficient of NA2, the third lens has a dispersion coefficient of NA3, and the seventh lens has a dispersion coefficient of NA7, which satisfies the following conditions: 1≦NA7/NA2. This helps to correct the chromatic aberration of the optical imaging system.

In the optical imaging system of this embodiment, the TV distortion of the optical imaging system during image formation becomes TDT, and the optical distortion during image formation becomes ODT, which satisfies the following conditions: │TDT│= 2.5678%; │ODT│=2.1302%.

In the optical imaging system of this embodiment, the shortest operating wavelength of the visible light in the positive meridian plane fan pattern is incident on the infrared light imaging plane through the aperture edge. The lateral aberration of the 0.7 field of view is represented by PSTA, which is 0.00040 mm, positive meridian The longest visible wavelength of the surface light fan pattern is incident on the infrared imaging surface through the edge of the aperture. The lateral aberration of 0.7 field of view is represented by PLTA, which is -0.009 mm, and the shortest working wavelength of the visible light of the negative meridian surface fan pattern passes through the aperture. The lateral aberration of the 0.7 field of view incident on the infrared imaging surface is represented by NSTA, which is -0.002 mm, and the longest working wavelength of the visible meridional light fan pattern is the 0.7 field of view incident on the infrared imaging surface through the edge of the aperture The lateral aberration is expressed in NLTA, which is -0.016 mm. The shortest working wavelength of visible light on the sagittal fan pattern is incident on the infrared imaging surface through the aperture edge. The lateral aberration of 0.7 field of view is represented by SSTA, which is 0.018 mm. The longest working wavelength of visible light on the sagittal fan diagram is incident through the edge of the aperture The lateral aberration of 0.7 field of view on the infrared imaging surface is expressed by SLTA, which is 0.016 mm.

Refer to Table 1 and Table 2 below. Table 1 lens data of the first embodiment f (focal length) = 4.3019 mm; f/HEP = 1.2; HAF (half angle of view) = 59.9968 deg surface Radius of curvature Thickness (mm) Material Refractive index Dispersion coefficient focal length 0 Subject flat Infinity 1 First lens -1079.499964 2.276 plastic 1.565 58.00 -14.53 2 8.304149657 4.552 3 Second lens 14.39130913 5.240 plastic 1.650 21.40 24.25 4 130.0869482 0.162 5 Third lens 8.167310118 0.837 plastic 1.650 21.40 -97.07 6 6.944477468 1.450 7 aperture flat 0.477 8 Fourth lens 121.5965254 2.002 plastic 1.565 58.00 9.75 9 -5.755749302 1.515 10 Fifth lens -86.27705938 4.271 plastic 1.565 58.00 7.16 11 -3.942936258 0.050 12 Sixth lens 4.867364751 0.300 plastic 1.650 21.40 -6.52 13 2.220604983 0.211 14 Seventh lens 1.892510651 1.118 plastic 1.650 21.40 8.29 15 2.224128115 1.400 16 Infrared filter flat 0.200 BK_7 1.517 64.2 17 flat 0.917 18 Infrared imaging surface flat Reference wavelength (d-line) is 555 nm Table 2. Aspheric coefficients of the first embodiment Table 2 Aspheric coefficients surface 1 2 3 4 5 6 8 k 2.500000E+01 -4.711931E-01 1.531617E+00 -1.153034E+01 -2.915013E+00 4.886991E+00 -3.459463E+01 A4 5.236918E-06 -2.117558E-04 7.146736E-05 4.353586E-04 5.793768E-04 -3.756697E-04 -1.292614E-03 A6 -3.014384E-08 -1.838670E-06 2.334364E-06 1.400287E-05 2.112652E-04 3.901218E-04 -1.602381E-05 A8 -2.487400E-10 9.605910E-09 -7.479362E-08 -1.688929E-07 -1.344586E-05 -4.925422E-05 -8.452359E-06 A10 1.170000E-12 -8.256000E-11 1.701570E-09 3.829807E-08 1.000482E-06 4.139741E-06 7.243999E-07 A12 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 A14 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 Table 2 Aspheric coefficients surface 9 10 11 12 13 14 15 k -7.549291E+00 -5.000000E+01 -1.740728E+00 -4.709650E+00 -4.509781E+00 -3.427137E+00 -3.215123E+00 A4 -5.583548E-03 1.240671E-04 6.467538E-04 -1.872317E-03 -8.967310E-04 -3.189453E-03 -2.815022E-03 A6 1.947110E-04 -4.949077E-05 -4.981838E-05 -1.523141E-05 -2.688331E-05 -1.058126E-05 1.884580E-05 A8 -1.486947E-05 2.088854E-06 9.129031E-07 -2.169414E-06 -8.324958E-07 1.760103E-06 -1.017223E-08 A10 -6.501246E-08 -1.438383E-08 7.108550E-09 -2.308304E-08 -6.184250E-09 -4.730294E-08 3.660000E-12 A12 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 A14 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00

According to Table 1 and Table 2, the following values related to the length of the profile curve can be obtained: First embodiment (using the main reference wavelength of 555 nm) ARE 1/2(HEP) ARE value ARE-1/2(HEP) 2(ARE/HEP)% TP ARE /TP (%) 11 1.792 1.792 -0.00044 99.98% 2.276 78.73% 12 1.792 1.806 0.01319 100.74% 2.276 79.33% twenty one 1.792 1.797 0.00437 100.24% 5.240 34.29% twenty two 1.792 1.792 -0.00032 99.98% 5.240 34.20% 31 1.792 1.808 0.01525 100.85% 0.837 216.01% 32 1.792 1.819 0.02705 101.51% 0.837 217.42% 41 1.792 1.792 -0.00041 99.98% 2.002 89.50% 42 1.792 1.825 0.03287 101.83% 2.002 91.16% 51 1.792 1.792 -0.00031 99.98% 4.271 41.96% 52 1.792 1.845 0.05305 102.96% 4.271 43.21% 61 1.792 1.818 0.02587 101.44% 0.300 606.10% 62 1.792 1.874 0.08157 104.55% 0.300 624.67% 71 1.792 1.898 0.10523 105.87% 1.118 169.71% 72 1.792 1.885 0.09273 105.17% 1.118 168.59% ARS EHD ARS value ARS-EHD (ARS/EHD)% TP ARS / TP (%) 11 15.095 15.096 0.001 100.01% 2.276 663.24% 12 10.315 11.377 1.062 110.29% 2.276 499.86% twenty one 7.531 8.696 1.166 115.48% 5.240 165.96% twenty two 4.759 4.881 0.122 102.56% 5.240 93.15% 31 3.632 4.013 0.382 110.51% 0.837 479.55% 32 2.815 3.159 0.344 112.23% 0.837 377.47% 41 2.967 2.971 0.004 100.13% 2.002 148.38% 42 3.402 3.828 0.426 112.53% 2.002 191.20% 51 4.519 4.523 0.004 100.10% 4.271 105.91% 52 5.016 5.722 0.706 114.08% 4.271 133.99% 61 5.019 5.823 0.805 116.04% 0.300 1941.14% 62 5.629 6.605 0.976 117.34% 0.300 2201.71% 71 5.634 6.503 0.869 115.43% 1.118 581.54% 72 6.488 7.152 0.664 110.24% 1.118 639.59%

Table 1 is the detailed structural data of the first embodiment of FIG. 1, in which the units of radius of curvature, thickness, distance and focal length are mm, and surfaces 0-16 sequentially represent the surface from the object side to the image side. Table 2 is the aspherical data in the first embodiment, where k is the conical coefficient in the aspherical curve equation, and A1-A20 represents the aspherical coefficients of the 1st to 20th orders of each surface. In addition, the following tables of the embodiments correspond to the schematic diagrams and aberration curve diagrams of the embodiments. The definitions of the data in the tables are the same as the definitions of Table 1 and Table 2 of the first embodiment, and are not repeated here.

Second embodiment Please refer to FIG. 2A and FIG. 2B, wherein FIG. 2A shows a schematic diagram of an optical imaging system according to the second embodiment of the present creation, and FIG. 2B is from left to right in order for the optical imaging system of the second embodiment. Graph of spherical aberration, astigmatism and optical distortion. FIG. 2C is a lateral aberration diagram of the optical imaging system of the second embodiment at a field of view of 0.7. As can be seen from FIG. 2A, the optical imaging system includes a first lens 210, an aperture 200, a second lens 220, a third lens 230, a fourth lens 240, a fifth lens 250, and a sixth lens 260 in order from the object side to the image side And a seventh lens 270, an infrared filter 280, an infrared imaging surface 290, and an image sensing element 292.

The first lens 210 has a positive refractive power and is made of plastic material. Its object side 212 is convex, its image side 214 is concave, and both are aspherical, and its object side 212 has an inflection point.

The second lens 220 has negative refractive power and is made of plastic material. Its object side 222 is concave, its image side 224 is concave, and both are aspherical, and both its object side 222 and image side 224 have an inflection point.

The third lens 230 has positive refractive power and is made of plastic material. Its object side 232 is convex, its image side 234 is concave, and both are aspherical, and its image side 234 has an inflexion point.

The fourth lens 240 has positive refractive power and is made of plastic material. Its object side 242 is convex, its image side 244 is concave, and both are aspherical, and its object side 242 and image side 244 both have an inflection point.

The fifth lens 250 has a positive refractive power and is made of plastic. Its object side 252 is convex, its image side 254 is concave, and both are aspherical, and its object side 252 has an inflexion point and the image side 254 has Second inflexion point.

The sixth lens 260 has a positive refractive power and is made of plastic material. Its object side 262 is convex, its image side 264 is concave, and both are aspherical, and its object side 262 and image side 264 have two inflexions. In this way, the angle at which each field of view is incident on the sixth lens 260 can be effectively adjusted to improve aberration.

The seventh lens 270 has negative refractive power and is made of plastic material. Its object side 272 is concave, its image side 274 is concave, and both are aspherical, and both its object side 272 and image side 274 have an inflection point. In this way, it is beneficial to shorten the back focal length to maintain miniaturization. In addition, it can effectively suppress the angle of incidence of the off-axis field of view, and can further correct the aberration of the off-axis field of view.

The infrared filter 280 is made of glass, which is disposed between the seventh lens 270 and the infrared imaging surface 290 and does not affect the focal length of the optical imaging system.

Please refer to Table 3 and Table 4 below. Table 3 Lens data of the second embodiment f (focal length) = 8.6556 mm; f/HEP = 1.4; HAF (half angle of view) = 20.5346 deg surface Radius of curvature Thickness (mm) Material Refractive index Dispersion coefficient focal length 0 Subject 1E+18 1E+18 1 First lens 3.608758597 1.959 plastic 1.544 56.09 8.454 2 13.8060016 0.490 3 aperture 1E+18 0.150 4 Second lens -10.34008735 0.400 plastic 1.515 56.55 -9.136 5 8.654799118 0.050 6 Third lens 4.039776435 0.436 plastic 1.661 20.39 22.206 7 5.362440883 0.050 8 Fourth lens 2.914317723 0.473 plastic 1.5441 56.090 9091.860 9 2.749936463 0.352 10 Fifth lens 2.873983403 0.533 plastic 1.661 20.39 13.208 11 3.995948109 1.154 12 Sixth lens 17.9817901 0.417 plastic 1.661 20.39 100.229 13 24.57331161 1.209 14 Seventh lens -29.18117929 0.542 plastic 1.636 23.89 -9.731 15 7.792296656 0.171 16 Infrared filter 1E+18 0.215 BK_7 1.517 64.2 17 1E+18 0.999 18 Infrared imaging surface 1E+18 0.001 The reference wavelength is 940 nm; the position of the light blocking: the effective radius of the light blocking 3.437 mm on the first surface; the effective radius of the light blocking 2.950 mm on the fifth surface; the effective radius of the light blocking 2.970 mm on the 15th surface; this embodiment Calculate the aperture value with the first aperture and use the exit pupil on the image side of the seventh lens as HXP Table 4. Aspheric coefficients of the second embodiment Table 4 Aspheric coefficients surface 1 2 4 5 6 7 8 k -6.020435E-01 -3.021045E+00 -3.926596E+01 -2.205177E+01 -1.813067E+00 2.043846E+00 -1.299930E+00 A4 -1.665998E-04 -2.865732E-03 -4.016547E-03 -2.327750E-03 1.086065E-02 1.594973E-02 4.428747E-03 A6 3.563534E-05 8.727019E-04 4.675536E-03 1.503727E-03 -1.841949E-03 -1.722523E-03 5.600680E-05 A8 1.472237E-05 -1.534967E-04 -1.124443E-03 -2.608390E-04 -3.422804E-04 -2.442256E-03 -9.417032E-04 A10 -5.304019E-06 2.881569E-05 1.769086E-04 1.070410E-05 1.340704E-04 9.160450E-04 1.480627E-04 A12 7.575763E-07 -3.136218E-06 -1.779748E-05 8.843343E-07 -1.534288E-05 -1.379784E-04 2.859123E-06 A14 -4.909059E-08 1.537957E-07 1.011806E-06 -5.694768E-08 6.102273E-07 9.285353E-06 -2.687307E-06 A16 1.080216E-09 -2.772807E-09 -2.452775E-08 -4.585678E-10 2.334429E-09 -2.244288E-07 1.820267E-07 Table 4 Aspheric coefficients surface 9 10 11 12 13 14 15 k -3.444200E+00 -5.441012E+00 2.299813E-01 -8.999827E+01 -3.396539E+01 8.999091E+01 -2.361751E+01 A4 4.716089E-03 8.913614E-03 -1.707338E-02 1.419255E-03 -5.810072E-03 -4.010619E-02 -3.472495E-02 A6 5.746184E-04 -5.502425E-03 1.850544E-03 -6.280987E-03 -3.099095E-04 8.903957E-03 7.861744E-03 A8 4.056198E-05 3.956161E-04 -1.963177E-03 3.301723E-03 3.772465E-05 -2.222118E-03 -1.724419E-03 A10 -4.277343E-04 2.175856E-04 7.910576E-04 -1.513522E-03 -3.210133E-05 6.986359E-04 3.179609E-04 A12 1.254760E-04 -4.394603E-05 -1.177970E-04 4.042532E-04 1.202548E-05 -1.361232E-04 -3.865119E-05 A14 -1.438544E-05 1.726265E-06 3.472448E-06 -5.898805E-05 -3.410486E-06 1.263136E-05 2.473662E-06 A16 6.053910E-07 6.027942E-08 3.380357E-07 3.479231E-06 3.016620E-07 -4.356463E-07 -6.225282E-08

In the second embodiment, the curve equation of the aspherical surface is expressed as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and will not be repeated here.

According to Table 3 and Table 4, the following conditional formula values can be obtained: Second embodiment (using the main reference wavelength of 940 nm) ∣f/f1│ ∣f/f2│ ∣f/f3│ ∣f/f4│ ∣f/f5│ ∣f/f6│ 1.0238 0.9475 0.3898 0.0010 0.6553 0.0864 ∣f/f7│ ΣPPR ΣNPR ΣPPR /│ΣNPR∣ IN12 / f IN67 / f 0.8895 1.5009 2.4923 0.6022 0.0740 0.1397 ∣f1/f2│ ∣f2/f3│ (TP1+IN12)/ TP2 (TP7+IN67)/ TP6 0.9254 0.4114 6.4988 4.1996 HOS InTL HOS / HOI InS/ HOS ODT% TDT% 9.4296 8.2157 2.8574 0.7403 1.7716 1.1496 HVT11 HVT12 HVT21 HVT22 HVT31 HVT32 0 0 1.4874 0 0 0 HVT61 HVT62 HVT71 HVT72 HVT72/ HOI HVT72/ HOS 0.7614 0.7282 0 0.8546 0.2590 0.0906 PSTA PLTA NSTA NLTA SSTA SLTA -0.062 mm -0.014 mm -0.007 mm -0.023 mm -0.020 mm -0.002 mm IN12 IN23 IN34 IN45 IN56 IN67 0.6405 mm 0.0500 mm 0.0500 mm 0.3520 mm 1.1540 mm 1.2092 mm

According to Tables 3 and 4, the following conditional formula values can be obtained: According to Tables 1 and 2, the following values related to the length of the profile curve can be obtained: Second embodiment (using the main reference wavelength 940 nm) ARE 1/2(HXP) ARE value ARE-1/2(HXP) 2(ARE/ HXP)% TP ARE /TP (%) 11 3.210 3.581 0.370 111.53% 1.959 182.78% 12 3.081 3.105 0.024 100.77% 1.959 158.48% twenty one 2.991 3.066 0.075 102.52% 0.400 766.45% twenty two 2.950 2.958 0.008 100.26% 0.400 739.39% 31 2.778 2.916 0.138 104.96% 0.436 668.15% 32 2.577 2.706 0.130 105.03% 0.436 620.08% 41 2.482 2.638 0.157 106.32% 0.473 558.22% 42 2.398 2.466 0.069 102.87% 0.473 521.84% 51 2.265 2.315 0.050 102.20% 0.533 434.19% 52 2.153 2.207 0.054 102.49% 0.533 413.93% 61 2.175 2.352 0.177 108.14% 0.417 564.03% 62 2.386 2.510 0.123 105.16% 0.417 601.92% 71 2.651 2.900 0.248 109.37% 0.542 535.22% 72 2.970 3.238 0.268 109.01% 0.542 597.65% ARS EHD ARS value ARS-EHD (ARS/EHD)% TP ARS / TP (%) 11 3.437 3.845 0.408 111.87% 1.959 196.26% 12 3.081 3.105 0.024 100.77% 1.959 158.48% twenty one 2.991 3.066 0.075 102.52% 0.400 766.45% twenty two 2.950 2.958 0.008 100.26% 0.400 739.39% 31 2.778 2.916 0.138 104.96% 0.436 668.15% 32 2.577 2.706 0.130 105.03% 0.436 620.08% 41 2.482 2.638 0.157 106.32% 0.473 558.22% 42 2.398 2.466 0.069 102.87% 0.473 521.84% 51 2.265 2.315 0.050 102.20% 0.533 434.19% 52 2.153 2.207 0.054 102.49% 0.533 413.93% 61 2.175 2.352 0.177 108.14% 0.417 564.03% 62 2.386 2.510 0.123 105.16% 0.417 601.92% 71 2.651 2.900 0.248 109.37% 0.542 535.22% 72 2.970 3.238 0.268 109.01% 0.542 597.65%

According to Table 3 and Table 4, the following conditional formula values can be obtained: The second embodiment is the value related to the inflexion point (using the main reference wavelength of 940 nm) HIF111 2.7553 HIF111/HOI 0.8349 SGI111 1.0894 │SGI111∣/(│SGI111∣+TP1) 0.3574 HIF211 0.8718 HIF211/HOI 0.2642 SGI211 -0.0319 │SGI211∣/(│SGI211∣+TP2) 0.0739 HIF221 2.3452 HIF221/HOI 0.7107 SGI221 0.1573 ∣SGI221│/(∣SGI221│+TP2) 0.2823 HIF321 2.3097 HIF321/HOI 0.6999 SGI321 0.5850 ∣SGI321│/(∣SGI321│+TP3) 0.5727 HIF411 2.1383 HIF411/HOI 0.6480 SGI411 0.6674 │SGI411∣/(│SGI411∣+TP4) 0.5854 HIF421 1.3945 HIF421/HOI 0.4226 SGI421 0.2998 ∣SGI421│/(∣SGI421│+TP4) 0.3881 HIF511 1.2786 HIF511/HOI 0.3875 SGI511 0.2374 │SGI511∣/(│SGI511∣+TP5) 0.3081 HIF521 1.4821 HIF521/HOI 0.4491 SGI521 0.2273 ∣SGI521│/(∣SGI521│+TP5) 0.2989 HIF522 1.7387 HIF522/HOI 0.5269 SGI522 0.2907 ∣SGI522│/(∣SGI522│+TP5) 0.3529 HIF611 0.4426 HIF611/HOI 0.1341 SGI611 0.0046 │SGI611∣/(│SGI611∣+TP6) 0.0109 HIF612 2.1144 HIF612/HOI 0.6407 SGI612 -0.4722 │SGI612∣/(│SGI612∣+TP6) 0.5311 HIF621 0.4180 HIF621/HOI 0.1267 SGI621 0.0030 ∣SGI621│/(∣SGI621│+TP6) 0.0071 HIF622 2.2740 HIF622/HOI 0.6891 SGI622 -0.3952 ∣SGI622│/(∣SGI622│+TP6) 0.4866 HIF711 2.5009 HIF711/HOI 0.7578 SGI711 -0.7984 │SGI711∣/(│SGI711∣+TP7) 0.5957 HIF721 0.4574 HIF721/HOI 0.1386 SGI721 0.0110 ∣SGI721│/(∣SGI721│+TP7) 0.0198

Third embodiment Please refer to FIG. 3A and FIG. 3B, wherein FIG. 3A shows a schematic diagram of an optical imaging system according to the third embodiment of the present creation, and FIG. 3B is from left to right in order for the optical imaging system of the third embodiment. Graph of spherical aberration, astigmatism and optical distortion. FIG. 3C is a lateral aberration diagram of the optical imaging system of the third embodiment at a field of view of 0.7. As can be seen from FIG. 3A, the optical imaging system includes a first lens 310, an aperture 300, a second lens 320, a third lens 330, a fourth lens 340, a fifth lens 350, and a sixth lens 360 in order from the object side to the image side And a seventh lens 370, an infrared filter 380, an infrared imaging surface 390, and an image sensing element 392.

The first lens 310 has positive refractive power and is made of plastic material. Its object side 312 is convex, its image side 314 is concave, and both are aspherical, and its object side 312 and image side 314 both have an inflection point.

The second lens 320 has a negative refractive power and is made of plastic material. Its object side 322 is concave, its image side 324 is concave, and both are aspherical, its object side 322 has two inflexions and the image side 324 has an inverse Tune point.

The third lens 330 has positive refractive power and is made of plastic material. Its object side 332 is convex, and its image side 334 is concave, and both are aspherical.

The fourth lens 340 has negative refractive power and is made of plastic material. Its object side 342 is convex, its image side 344 is concave, and both are aspherical, its object side 342 has two inflexions and the image side 354 has an inverse Tune point.

The fifth lens 350 has a positive refractive power and is made of plastic material. Its object side 352 is convex, its image side 354 is concave, and both are aspherical, and its object side 352 has a triple inverse point and the image side 354 has two Recurve point.

The sixth lens 360 has a positive refractive power and is made of plastic. Its object side 362 is convex, its image side 364 is convex, and both are aspherical, and its object side 362 has two inflexions and the image side 364 has an inverse Tune point. Thereby, the angle at which each field of view is incident on the sixth lens 360 can be effectively adjusted to improve aberrations.

The seventh lens 370 has a negative refractive power and is made of plastic material. Its object side 372 is convex, and its image side 374 is concave, and both are aspherical. In this way, it is beneficial to shorten the back focal length to maintain miniaturization. In addition, the object side surface 372 has a second inflexion point and the image side surface 374 has an inverse curvature point, which can effectively suppress the angle of incidence of the off-axis field of view and further correct the aberration of the off-axis field of view.

The infrared filter 380 is made of glass, which is disposed between the seventh lens 370 and the infrared imaging surface 390 and does not affect the focal length of the optical imaging system.

Please refer to Table 5 and Table 6 below. Table 5 Third embodiment lens data f (focal length) = 8.6158 mm; f/HEP = 1.0; HAF (half angle of view) = 20.5502 deg surface Radius of curvature Thickness (mm) Material Refractive index Dispersion coefficient focal length 0 Subject 1E+18 1E+18 1 First lens 5.112456695 2.000 plastic 1.544 56.09 11.506 2 24.59945941 0.346 3 aperture 1E+18 0.150 4 Second lens -12.29966691 0.419 plastic 1.515 56.55 -9.682 5 8.401305303 0.050 6 Third lens 3.380404133 1.347 plastic 1.661 20.39 10.088 7 5.855969919 0.431 8 Fourth lens 2.7783257 0.543 plastic 1.544 56.09 -191.577 9 2.519978139 1.142 10 Fifth lens 3.788193622 0.589 plastic 1.661 20.39 15.450 11 5.695684242 1.349 12 Sixth lens 45.78926584 0.559 plastic 1.661 20.39 54.188 13 -154.4855046 0.230 14 Seventh lens 4.700764222 0.394 plastic 1.636 23.89 -10.905 15 2.698147892 0.239 16 Infrared filter 1E+18 0.215 BK_7 1.517 64.2 17 1E+18 0.999 18 Infrared imaging surface 1E+18 0.001 The reference wavelength is 940 nm; the position of the light blocking: the effective radius of the light passing through the 4th side is 4.465 mm; the effective radius of the light passing through the 5th side is 4.465 mm; the effective radius of the light passing through the 9th side is 3.100 mm; The exit pupil on the image side of the seventh lens serves as HXP Table 6. Aspheric coefficients of the third embodiment Table 6 Aspheric coefficients surface 1 2 4 5 6 7 8 k -8.274930E-01 -2.567073E+01 -2.693232E+01 -2.822341E+00 -1.506280E+00 1.723385E+00 -1.229266E+00 A4 -5.472769E-04 -2.776560E-03 1.509562E-02 2.097049E-02 8.419929E-03 7.815428E-03 -3.376133E-03 A6 8.353616E-05 1.067811E-03 -2.074464E-03 -5.357177E-03 -2.037358E-03 -1.131033E-03 8.600724E-04 A8 -1.765267E-05 -1.776985E-04 1.840679E-04 5.811635E-04 3.306483E-04 -1.530358E-05 -4.592307E-04 A10 1.850435E-06 1.538122E-05 -1.186089E-05 -3.466600E-05 -5.206337E-05 -5.932071E-06 4.425298E-05 A12 -1.504192E-07 -7.429141E-07 6.368232E-07 1.172483E-06 5.742477E-06 3.389440E-06 1.538306E-06 A14 6.015457E-09 1.898004E-08 -2.219552E-08 -2.123347E-08 -3.343524E-07 -3.639285E-07 -4.269123E-07 A16 -8.820639E-11 -2.015608E-10 3.182121E-10 1.630629E-10 7.739030E-09 1.210206E-08 1.699109E-08 Table 6 Aspheric coefficients surface 9 10 11 12 13 14 15 k -3.170098E+00 -7.290405E+00 4.256323E-01 -7.269228E+01 -3.156745E+01 -3.417011E+01 -1.398615E+01 A4 2.106319E-03 3.884817E-03 -1.052475E-02 1.455030E-02 -2.140274E-02 -1.349309E-01 -7.874989E-02 A6 1.472733E-03 -1.384577E-04 2.067012E-03 -2.247441E-02 5.048437E-03 5.903182E-02 3.133721E-02 A8 -9.134375E-04 -1.498622E-03 -1.797602E-03 1.365764E-02 2.037305E-03 -1.392772E-02 -7.652589E-03 A10 1.709433E-04 6.267565E-04 6.188574E-04 -5.233465E-03 -1.529550E-03 1.866830E-03 1.132295E-03 A12 -1.749428E-05 -1.281974E-04 -1.107698E-04 1.091974E-03 3.350093E-04 -1.454527E-04 -1.002298E-04 A14 9.481144E-07 1.283923E-05 9.987438E-06 -1.155219E-04 -3.278021E-05 6.348745E-06 4.896584E-06 A16 -2.050334E-08 -4.921486E-07 -3.343660E-07 4.839359E-06 1.227615E-06 -1.234321E-07 -1.019593E-07 In the third embodiment, the curve equation of the aspherical surface is expressed as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and will not be repeated here.

According to Table 5 and Table 6, the following conditional formula values can be obtained: Third embodiment (using the main reference wavelength of 940 nm) ∣f/f1│ ∣f/f2│ ∣f/f3│ ∣f/f4│ ∣f/f5│ ∣f/f6│ 0.7488 0.8899 0.8541 0.0450 0.5576 0.1590 ∣f/f7│ ΣPPR ΣNPR ΣPPR /│ΣNPR∣ IN12 / f IN67 / f 0.7901 1.8069 2.2376 0.8075 0.0576 0.0267 ∣f1/f2│ ∣f2/f3│ (TP1+IN12)/ TP2 (TP7+IN67)/ TP6 1.1884 0.9598 5.9590 1.1168 HOS InTL HOS / HOI InS/ HOS ODT% TDT% 10.8072 9.5482 3.2749 0.7829 2.1571 1.1847 HVT11 HVT12 HVT21 HVT22 HVT31 HVT32 0 3.9133 1.2870 0 0 0 HVT61 HVT62 HVT71 HVT72 HVT72/ HOI HVT72/ HOS 1.1503 0 0.6371 1.1627 0.3523 0.1076 PSTA PLTA NSTA NLTA SSTA SLTA -0.039 mm 0.008 mm 0.022 mm -0.006 mm -0.038 mm 0.008 mm IN12 IN23 IN34 IN45 IN56 IN67 0.4963 mm 0.0500 mm 0.4306 mm 1.1416 mm 1.3492 mm 0.2301 mm

According to Table 5 and Table 6, the following values related to the length of the contour curve can be obtained: Third embodiment (using the main reference wavelength 940 nm) ARE 1/2(HXP) ARE value ARE-1/2(HXP) 2(ARE/ HXP)% TP ARE /TP (%) 11 4.489 4.749 0.260 105.79% 2.000 237.46% 12 4.489 4.498 0.008 100.19% 2.000 224.90% twenty one 4.465 4.660 0.194 104.35% 0.419 1112.40% twenty two 4.465 4.545 0.079 101.77% 0.419 1084.89% 31 3.780 4.430 0.651 117.21% 1.347 328.98% 32 3.386 3.667 0.281 108.31% 1.347 272.33% 41 3.258 3.444 0.186 105.71% 0.543 633.91% 42 3.100 3.265 0.165 105.32% 0.543 600.87% 51 2.806 2.850 0.043 101.54% 0.589 483.72% 52 2.705 2.728 0.023 100.85% 0.589 463.09% 61 2.718 3.137 0.418 115.40% 0.559 561.45% 62 2.911 3.267 0.356 112.24% 0.559 584.79% 71 3.021 3.232 0.211 106.97% 0.394 820.72% 72 3.250 3.452 0.203 106.24% 0.394 876.73% ARS EHD ARS value ARS-EHD (ARS/EHD)% TP ARS / TP (%) 11 4.689 4.949 0.260 105.55% 2.000 247.45% 12 4.559 4.569 0.010 100.22% 2.000 228.43% twenty one 4.465 4.660 0.194 104.35% 0.419 1112.40% twenty two 4.465 4.545 0.079 101.77% 0.419 1084.89% 31 3.780 4.430 0.651 117.21% 1.347 328.98% 32 3.386 3.667 0.281 108.31% 1.347 272.33% 41 3.258 3.444 0.186 105.71% 0.543 633.91% 42 3.100 3.265 0.165 105.32% 0.543 600.87% 51 2.806 2.850 0.043 101.54% 0.589 483.72% 52 2.705 2.728 0.023 100.85% 0.589 463.09% 61 2.718 3.137 0.418 115.40% 0.559 561.45% 62 2.911 3.267 0.356 112.24% 0.559 584.79% 71 3.021 3.232 0.211 106.97% 0.394 820.72% 72 3.250 3.452 0.203 106.24% 0.394 876.73%

According to Table 5 and Table 6, the following conditional formula values can be obtained: The third embodiment is the value related to the inflection point (using the main reference wavelength of 940 nm) HIF111 3.1047 HIF111/HOI 0.9408 SGI111 0.9030 │SGI111∣/(│SGI111∣+TP1) 0.3111 HIF121 2.5770 HIF121/HOI 0.7809 SGI121 0.1166 ∣SGI121│/(∣SGI121│+TP1) 0.0551 HIF211 0.6855 HIF211/HOI 0.2077 SGI211 -0.0156 │SGI211∣/(│SGI211∣+TP2) 0.0359 HIF212 4.0370 HIF212/HOI 1.2233 SGI212 0.6671 │SGI212∣/(│SGI212∣+TP2) 0.6143 HIF221 1.9144 HIF221/HOI 0.5801 SGI221 0.3157 ∣SGI221│/(∣SGI221│+TP2) 0.4298 HIF411 1.8240 HIF411/HOI 0.5527 SGI411 0.5411 │SGI411∣/(│SGI411∣+TP4) 0.4990 HIF412 3.1784 HIF412/HOI 0.9631 SGI412 1.0084 │SGI412∣/(│SGI412∣+TP4) 0.6498 HIF421 1.7809 HIF421/HOI 0.5397 SGI421 0.5307 ∣SGI421│/(∣SGI421│+TP4) 0.4941 HIF511 1.4214 HIF511/HOI 0.4307 SGI511 0.2285 │SGI511∣/(│SGI511∣+TP5) 0.2795 HIF512 2.6242 HIF512/HOI 0.7952 SGI512 0.3486 │SGI512∣/(│SGI512∣+TP5) 0.3717 HIF513 2.7118 HIF513/HOI 0.8218 SGI513 0.3353 │SGI513∣/(│SGI513∣+TP5) 0.3627 HIF521 1.2111 HIF521/HOI 0.3670 SGI521 0.1097 ∣SGI521│/(∣SGI521│+TP5) 0.1570 HIF522 2.2993 HIF522/HOI 0.6968 SGI522 0.1878 ∣SGI522│/(∣SGI522│+TP5) 0.2418 HIF611 0.7630 HIF611/HOI 0.2312 SGI611 0.0081 │SGI611∣/(│SGI611∣+TP6) 0.0143 HIF612 2.5897 HIF612/HOI 0.7848 SGI612 -0.7611 │SGI612∣/(│SGI612∣+TP6) 0.5767 HIF621 2.7384 HIF621/HOI 0.8298 SGI621 -0.7906 ∣SGI621│/(∣SGI621│+TP6) 0.5859 HIF711 0.3426 HIF711/HOI 0.1038 SGI711 0.0102 │SGI711∣/(│SGI711∣+TP7) 0.0253 HIF712 2.5914 HIF712/HOI 0.7853 SGI712 -0.6472 │SGI712∣/(│SGI712∣+TP7) 0.6217 HIF721 0.5314 HIF721/HOI 0.1610 SGI721 0.0414 ∣SGI721│/(∣SGI721│+TP7) 0.0951

Fourth embodiment Please refer to FIGS. 4A and 4B, in which FIG. 4A shows a schematic diagram of an optical imaging system according to the fourth embodiment of the present creation, and FIG. 4B is from left to right in order for the optical imaging system of the fourth embodiment. Graph of spherical aberration, astigmatism and optical distortion. FIG. 4C is a lateral aberration diagram of the optical imaging system of the fourth embodiment at a field of view of 0.7. As can be seen from FIG. 4A, the optical imaging system sequentially includes the aperture 400, the first lens 410, the second lens 420, the third lens 430, the fourth lens 440, the fifth lens 450, and the sixth lens 460 And a seventh lens 470, an infrared filter 480, an infrared imaging surface 490, and an image sensing element 492.

The first lens 410 has a positive refractive power and is made of plastic material. Its object side 412 is convex, its image side 414 is concave, and both are aspherical, and its object side 412 has an inflection point.

The second lens 420 has negative refractive power and is made of plastic material. Its object side 422 is convex, its image side 424 is concave, and both are aspherical, and its image side 424 has an inflection point.

The third lens 430 has a positive refractive power and is made of plastic material. Its object side 432 is convex, its image side 434 is concave, and both are aspherical, its object side 432 has two reflex points and the image side 424 has triple reflection Tune point.

The fourth lens 440 has positive refractive power and is made of plastic material. Its object side 442 is convex, its image side 444 is concave, and both are aspherical, and its object side 442 and image side 444 both have a double inflection point.

The fifth lens 450 has positive refractive power and is made of plastic material. Its object side 452 is convex, its image side 454 is concave, and both are aspherical, and its object side 452 and image side 454 both have an inflection point.

The sixth lens 460 has a positive refractive power and is made of plastic material. Its object side 462 is convex, its image side 464 is convex, and both are aspherical, and its object side 462 and image side 464 both have an inflection point. Thereby, the angle at which each field of view is incident on the sixth lens 460 can be effectively adjusted to improve aberrations.

The seventh lens 470 has negative refractive power and is made of plastic material. Its object side 472 is convex, and its image side 474 is concave, and both are aspherical. In this way, it is beneficial to shorten the back focal length to maintain miniaturization. In addition, both the object side surface 472 and the image side surface 474 have a double inflection point, which can effectively suppress the angle of incidence of the off-axis field of view and further correct the aberration of the off-axis field of view.

The infrared filter 480 is made of glass, which is disposed between the seventh lens 470 and the infrared imaging surface 490 and does not affect the focal length of the optical imaging system.

Please refer to Table 7 and Table 8 below. Table 7 Lens data of the fourth embodiment f (focal length) = 6.7787 mm; f/HEP = 1.4; HAF (half angle of view) = 25.6275 deg surface Radius of curvature Thickness (mm) Material Refractive index Dispersion coefficient focal length 0 Subject 1E+18 1E+18 1 First lens 3.422929224 0.696 plastic 1.584 29.89 19.272 2 4.57054616 0.846 3 aperture 1E+18 -0.321 4 Second lens 22.29252636 0.738 plastic 1.515 56.55 -35.085 5 9.836765156 0.150 6 Third lens 22.8180854 0.543 plastic 1.661 20.39 111.489 7 32.93339546 0.050 8 Fourth lens 2.368073586 0.978 plastic 1.544 56.09 21.288 9 2.547918656 0.228 10 Fifth lens 2.560253873 0.602 plastic 1.661 20.39 13.392 11 3.284885133 1.203 12 Sixth lens 19.58525893 0.727 plastic 1.661 20.39 9.242 13 -8.586539162 0.758 14 Seventh lens 29.10157108 0.359 plastic 1.636 23.89 -5.979 15 3.312112442 0.228 16 Infrared filter 1E+18 0.215 BK_7 1.517 64.2 17 1E+18 1.000 18 Infrared imaging surface 1E+18 0.000 The reference wavelength is 940 nm; the position of the light blocking: the effective radius of the light passing through the sixth surface is 2.746 mm; the effective radius of the light passing through the seventh surface is 2.770 mm; the effective radius of the light passing through the 15th surface is 2.950 mm; The exit pupil on the image side of the seventh lens serves as HXP Table 8. Aspheric coefficients of the fourth embodiment Table 8 Aspheric coefficient surface 1 2 4 5 6 7 8 k -2.319837E+00 -9.200961E+00 6.852471E+01 -8.945487E+01 6.503287E+01 8.988503E+01 -1.212746E+00 A4 3.754323E-03 1.273511E-02 1.395197E-02 1.788787E-02 6.017742E-03 5.627701E-03 -7.360646E-04 A6 -1.816684E-03 -6.074251E-03 -9.687121E-03 -1.849369E-02 -3.743121E-03 -2.242977E-03 -2.492451E-03 A8 3.151676E-04 1.128158E-03 3.357512E-03 7.075838E-03 1.191534E-04 2.946467E-04 5.238502E-04 A10 -9.255319E-05 -1.091122E-04 -5.754096E-04 -1.482386E-03 3.004769E-04 7.993898E-06 9.690364E-05 A12 1.427989E-05 1.405535E-05 6.353942E-05 1.865340E-04 -8.628215E-05 -1.100013E-05 -8.752066E-05 A14 -8.699769E-07 -2.283839E-06 -5.080905E-06 -1.397226E-05 9.987259E-06 2.012662E-06 1.713495E-05 A16 1.727348E-08 1.565328E-07 2.010750E-07 4.914979E-07 -4.295077E-07 -1.254936E-07 -1.076750E-06 Table 8 Aspheric coefficient surface 9 10 11 12 13 14 15 k -6.934912E+00 -6.306659E+00 2.138094E-01 -8.998695E+01 -2.749949E+01 8.900696E+01 -1.427832E+01 A4 6.565919E-03 1.977947E-03 -1.376303E-02 -3.332985E-03 -8.580272E-03 -1.087960E-01 -6.615250E-02 A6 -3.199442E-03 -1.176738E-03 5.012094E-03 -1.448698E-03 1.930532E-03 4.370249E-02 2.569579E-02 A8 -2.316685E-03 -2.220488E-03 -2.380857E-03 3.294246E-04 -2.070344E-04 -1.150533E-02 -6.706569E-03 A10 1.287927E-03 1.517894E-03 1.422015E-03 5.389812E-07 -8.202646E-07 2.030953E-03 1.138817E-03 A12 -2.686568E-04 -3.501910E-04 -3.495731E-04 -1.751515E-05 2.236784E-05 -2.179917E-04 -1.211066E-04 A14 2.893757E-05 3.727091E-05 3.396473E-05 2.739816E-06 -6.292785E-06 1.281568E-05 7.307362E-06 A16 -1.344272E-06 -1.680183E-06 -1.190062E-06 -3.335559E-07 4.770092E-07 -3.191279E-07 -1.887382E-07

In the fourth embodiment, the curve equation of the aspherical surface is expressed as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and will not be repeated here.

According to Table 7 and Table 8, the following conditional formula values can be obtained: Fourth embodiment (using the main reference wavelength of 940 nm) ∣f/f1│ ∣f/f2│ ∣f/f3│ ∣f/f4│ ∣f/f5│ ∣f/f6│ 0.3517 0.1932 0.0608 0.3184 0.5062 0.7334 ∣f/f7│ ΣPPR ΣNPR ΣPPR /│ΣNPR∣ IN12 / f IN67 / f 1.1337 1.4644 1.8331 0.7989 0.0774 0.1118 ∣f1/f2│ ∣f2/f3│ (TP1+IN12)/ TP2 (TP7+IN67)/ TP6 0.5493 0.3147 1.6544 1.5370 HOS InTL HOS / HOI InS/ HOS ODT% TDT% 8.8584 7.5569 2.6844 0.8259 1.4828 0.5507 HVT11 HVT12 HVT21 HVT22 HVT31 HVT32 0 0 0 2.1143 0 0 HVT61 HVT62 HVT71 HVT72 HVT72/ HOI HVT72/ HOS 1.3795 0 0.2888 1.2077 0.3660 0.1363 PSTA PLTA NSTA NLTA SSTA SLTA -0.017 mm 0.003 mm 0.021 mm 0.010 mm -0.013 mm -0.001 mm IN12 IN23 IN34 IN45 IN56 IN67 0.5246 mm 0.1500 mm 0.0500 mm 0.2283 mm 1.2028 mm 0.7580 mm

According to Table 7 and Table 8, the following values related to the length of the profile curve can be obtained: Fourth embodiment (using the main reference wavelength of 940 nm) ARE 1/2(HXP) ARE value ARE-1/2(HXP) 2(ARE/HXP)% TP ARE /TP (%) 11 2.509 2.610 0.101 104.04% 0.696 374.86% 12 2.509 2.576 0.067 102.68% 0.696 369.97% twenty one 2.509 2.567 0.058 102.33% 0.738 347.87% twenty two 2.509 2.512 0.003 100.12% 0.738 340.38% 31 2.509 2.515 0.006 100.22% 0.543 463.47% 32 2.509 2.512 0.003 100.13% 0.543 463.03% 41 2.482 2.704 0.222 108.94% 0.978 276.39% 42 2.393 2.454 0.061 102.53% 0.978 250.76% 51 2.353 2.472 0.119 105.06% 0.602 410.41% 52 2.218 2.445 0.227 110.22% 0.602 406.05% 61 2.243 2.280 0.037 101.64% 0.727 313.76% 62 2.460 2.489 0.029 101.18% 0.727 342.47% 71 2.509 2.611 0.102 104.05% 0.359 727.37% 72 2.509 2.538 0.029 101.14% 0.359 707.03% ARS EHD ARS value ARS-EHD (ARS/EHD)% TP ARS / TP (%) 11 2.815 2.929 0.114 104.05% 0.696 420.59% 12 2.586 2.664 0.077 103.00% 0.696 382.53% twenty one 2.525 2.586 0.060 102.39% 0.738 350.34% twenty two 2.555 2.557 0.003 100.11% 0.738 346.49% 31 2.746 2.763 0.018 100.65% 0.543 509.34% 32 2.770 2.776 0.005 100.19% 0.543 511.58% 41 2.482 2.704 0.222 108.94% 0.978 276.39% 42 2.393 2.454 0.061 102.53% 0.978 250.76% 51 2.353 2.472 0.119 105.06% 0.602 410.41% 52 2.218 2.445 0.227 110.22% 0.602 406.05% 61 2.243 2.280 0.037 101.64% 0.727 313.76% 62 2.460 2.489 0.029 101.18% 0.727 342.47% 71 2.752 2.853 0.101 103.68% 0.359 794.95% 72 2.950 3.003 0.053 101.81% 0.359 836.84%

According to Table 7 and Table 8, the following conditional formula values can be obtained: The fourth embodiment is the value related to the inflection point (using the main reference wavelength of 940 nm) HIF111 1.7103 HIF111/HOI 0.5183 SGI111 0.3943 │SGI111∣/(│SGI111∣+TP1) 0.3615 HIF112 2.5197 HIF112/HOI 0.7635 SGI112 0.6659 │SGI112∣/(│SGI112∣+TP1) 0.4888 HIF221 0.9477 HIF221/HOI 0.2872 SGI221 0.0437 ∣SGI221│/(∣SGI221│+TP2) 0.0559 HIF311 1.2856 HIF311/HOI 0.3896 SGI311 0.0410 │SGI311∣/(│SGI311∣+TP3) 0.0703 HIF312 1.7426 HIF312/HOI 0.5281 SGI312 0.0660 │SGI312∣/(│SGI312∣+TP3) 0.1085 HIF321 1.6634 HIF321/HOI 0.5040 SGI321 0.0560 ∣SGI321│/(∣SGI321│+TP3) 0.0936 HIF322 1.9304 HIF322/HOI 0.5850 SGI322 0.0725 ∣SGI322│/(∣SGI322│+TP3) 0.1178 HIF323 2.4141 HIF323/HOI 0.7315 SGI323 0.1055 ∣SGI323│/(∣SGI323│+TP3) 0.1629 HIF411 1.8227 HIF411/HOI 0.5523 SGI411 0.6271 │SGI411∣/(│SGI411∣+TP4) 0.3906 HIF421 1.1389 HIF421/HOI 0.3451 SGI421 0.2065 ∣SGI421│/(∣SGI421│+TP4) 0.1743 HIF422 1.9022 HIF422/HOI 0.5764 SGI422 0.3904 ∣SGI422│/(∣SGI422│+TP4) 0.2852 HIF511 2.1362 HIF511/HOI 0.6473 SGI511 0.5906 │SGI511∣/(│SGI511∣+TP5) 0.4951 HIF521 2.0161 HIF521/HOI 0.6110 SGI521 0.7070 ∣SGI521│/(∣SGI521│+TP5) 0.5400 HIF611 0.8192 HIF611/HOI 0.2482 SGI611 0.0146 │SGI611∣/(│SGI611∣+TP6) 0.0197 HIF621 2.4022 HIF621/HOI 0.7280 SGI621 -0.3221 ∣SGI621│/(∣SGI621│+TP6) 0.3071 HIF711 0.1649 HIF711/HOI 0.0500 SGI711 0.0004 │SGI711∣/(│SGI711∣+TP7) 0.0011 HIF712 1.8319 HIF712/HOI 0.5551 SGI712 -0.3594 │SGI712∣/(│SGI712∣+TP7) 0.5004 HIF721 0.5635 HIF721/HOI 0.1708 SGI721 0.0381 ∣SGI721│/(∣SGI721│+TP7) 0.0960 HIF722 2.6593 HIF722/HOI 0.8058 SGI722 -0.1949 ∣SGI722│/(∣SGI722│+TP7) 0.3520

Fifth embodiment Please refer to FIGS. 5A and 5B, wherein FIG. 5A shows a schematic diagram of an optical imaging system according to the fifth embodiment of the present invention, and FIG. 5B is the optical imaging system of the fifth embodiment in order from left to right. Graph of spherical aberration, astigmatism and optical distortion. FIG. 5C is a lateral aberration diagram of the optical imaging system of the fifth embodiment at a field of view of 0.7. As can be seen from FIG. 5A, the optical imaging system includes a first lens 510, an aperture 500, a second lens 520, a third lens 530, a fourth lens 540, a fifth lens 550, and a sixth lens 560 in order from the object side to the image side And a seventh lens 570, an infrared filter 580, an infrared imaging surface 590, and an image sensing element 592.

The first lens 510 has positive refractive power and is made of plastic material. Its object side 512 is convex, its image side 514 is concave, and both are aspherical, and its object side 522 has two reflex points and the image side 514 has three sides Tune point.

The second lens 520 has a negative refractive power and is made of plastic material. Its object side 522 is convex, its image side 524 is concave, and both are aspherical, its object side 522 has an inflection point and the image side 524 has a triple reflection Tune point.

The third lens 530 has a negative refractive power and is made of plastic material. Its object side 532 is concave, its image side 534 is convex, and both are aspherical, its object side 532 has an inflection point, and the image side 534 has a double reflection Tune point.

The fourth lens 540 has negative refractive power and is made of plastic material. Its object side 542 is convex, its image side 544 is concave, and both are aspherical, its object side 542 has an inflection point, and the image side 544 has a triple reflection Tune point.

The fifth lens 550 has positive refractive power and is made of plastic material. Its object side 552 is convex, its image side 554 is concave, and both are aspherical, and both its object side 552 and image side 554 have an inflection point.

The sixth lens 560 has a positive refractive power and is made of plastic material. Its object side 562 is convex, its image side 564 is convex, and both are aspherical, and its object side 562 has an inflection point and the image side 564 has two Recurve point. Thereby, the angle at which each field of view is incident on the sixth lens 560 can be effectively adjusted to improve aberrations.

The seventh lens 570 has a negative refractive power and is made of plastic material. Its object side 572 is concave and its image side 574 is concave. Both are aspherical and its object side 572 has an inflexion point and the image side 574 has two Recurve point. In this way, it is beneficial to shorten the back focal length to maintain miniaturization. In addition, it can effectively suppress the angle of incidence of the off-axis field of view and correct the aberration of the off-axis field of view.

The infrared filter 580 is made of glass, which is disposed between the seventh lens 570 and the infrared imaging surface 590 and does not affect the focal length of the optical imaging system.

Please refer to Table 9 and Table 10 below. Table 9 Lens data of the fifth embodiment f (focal length) = 6.7546 mm; f/HEP = 1.0; HAF (half angle of view) = 25.7508 deg surface Radius of curvature Thickness (mm) Material Refractive index Dispersion coefficient focal length 0 Subject 1E+18 1E+18 1 First lens 5.298245424 0.803 plastic 1.584 29.89 11.921 2 21.57523391 1.000 3 aperture 1E+18 -0.697 4 Second lens 23.40585276 1.040 plastic 1.515 56.55 -95.106 5 15.57045994 0.881 6 Third lens -2.992855613 0.664 plastic 1.661 20.39 -104.018 7 -3.405383503 0.050 8 Fourth lens 2.574574018 0.628 plastic 1.544 56.09 -29.561 9 2.027728857 0.064 10 Fifth lens 2.123128122 0.769 plastic 1.661 20.39 8.130 11 3.033309022 1.437 12 Sixth lens 22.79085785 0.793 plastic 1.661 20.39 9.104 13 -7.9244487 0.687 14 Seventh lens -30.54121414 0.350 plastic 1.636 23.89 -7.193 15 5.32930708 0.215 16 Infrared filter 1E+18 0.215 BK_7 1.517 64.2 17 1E+18 0.999 18 Infrared imaging surface 1E+18 0.000 The reference wavelength is 940 nm; the position of the light blocking: the effective radius of the light on the first face is 3.850 mm; the effective radius of the light on the sixth face is 3.468 mm; the effective radius of the light on the seventh face is 3.468 mm; The effective radius of the surface is 3.220 mm; the exit pupil on the image side of the seventh lens is used as HXP Table 10. Aspheric coefficients of the fifth embodiment Table 10 Aspheric coefficients surface 1 2 4 5 6 7 8 k -5.245636E+00 -8.053831E+01 3.783436E+01 -8.999849E+01 -1.073550E+01 -1.270020E+01 -1.088205E+00 A4 1.928599E-03 4.942448E-03 8.338823E-03 3.456488E-03 -3.712552E-03 -9.643133E-03 -1.835446E-02 A6 -7.897549E-04 -2.857701E-03 -3.761874E-03 -3.046736E-03 1.016865E-03 3.333087E-03 4.894732E-03 A8 2.638472E-05 7.173579E-04 1.181456E-03 9.194580E-04 -7.610935E-05 -6.447460E-04 -1.365563E-03 A10 -3.719980E-06 -1.008558E-04 -1.824933E-04 -1.645991E-04 -1.441722E-06 9.187533E-05 2.596052E-04 A12 7.864408E-07 7.947799E-06 1.524817E-05 1.721252E-05 1.140757E-06 -8.327670E-06 -2.908487E-05 A14 -5.082501E-08 -3.254641E-07 -6.731053E-07 -9.315642E-07 -8.523554E-08 4.114781E-07 1.900000E-06 A16 1.061118E-09 5.381534E-09 1.206802E-08 1.987826E-08 1.763176E-09 -8.500219E-09 -5.878333E-08 Table 10 Aspheric coefficients surface 9 10 11 12 13 14 15 k -4.861370E+00 -3.151498E+00 -1.380852E-01 -8.999002E+01 -3.395831E+01 8.997881E+01 -1.540630E+01 A4 1.847371E-02 1.578337E-02 -2.802058E-03 1.765631E-03 -6.166059E-03 -5.367681E-02 -4.350907E-02 A6 -2.085130E-02 -1.170561E-02 2.986950E-03 4.956375E-04 4.293549E-03 2.087925E-02 1.701734E-02 A8 7.418098E-03 4.139603E-03 -1.100715E-03 -7.708985E-05 -1.164607E-03 -5.302619E-03 -4.505894E-03 A10 -1.415525E-03 -7.914835E-04 1.035897E-04 -1.081823E-05 2.277156E-04 8.425794E-04 7.588408E-04 A12 1.595465E-04 8.848275E-05 1.196524E-05 7.453158E-06 -2.269772E-05 -7.110360E-05 -7.720766E-05 A14 -9.837656E-06 -5.393224E-06 -2.975898E-06 -1.663596E-06 6.409401E-07 2.703230E-06 4.339745E-06 A16 2.496134E-07 1.295827E-07 1.462739E-07 9.358254E-08 1.544011E-08 -2.783714E-08 -1.029223E-07

In the fifth embodiment, the curve equation of the aspherical surface is expressed as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and will not be repeated here.

According to Table 9 and Table 10, the following conditional formula values can be obtained: Fifth embodiment (using the main reference wavelength of 940 nm) ∣f/f1│ ∣f/f2│ ∣f/f3│ ∣f/f4│ ∣f/f5│ ∣f/f6│ 0.5666 0.0710 0.0649 0.2285 0.8308 0.7420 ∣f/f7│ ΣPPR ΣNPR ΣPPR /│ΣNPR∣ IN12 / f IN67 / f 0.9391 1.6020 1.8409 0.8702 0.0448 0.1017 ∣f1/f2│ ∣f2/f3│ (TP1+IN12)/ TP2 (TP7+IN67)/ TP6 0.1253 0.9143 1.0637 1.3078 HOS InTL HOS / HOI InS/ HOS ODT% TDT% 9.7349 8.4701 2.9500 0.8148 1.2770 0.5062 HVT11 HVT12 HVT21 HVT22 HVT31 HVT32 2.8242 0 0 3.4212 2.8786 0 HVT61 HVT62 HVT71 HVT72 HVT72/ HOI HVT72/ HOS 2.3264 2.0658 2.6379 1.4103 0.4274 0.1449 PSTA PLTA NSTA NLTA SSTA SLTA -0.067 mm -0.017 mm 0.990 mm 0.004 mm -0.041 mm -0.001 mm IN12 IN23 IN34 IN45 IN56 IN67 0.3024 mm 0.8814 mm 0.0500 mm 0.0639 mm 1.4372 mm 0.6872 mm

According to Table 9 and Table 10, the following values related to the length of the profile curve can be obtained: Fifth embodiment (using the main reference wavelength of 940 nm) ARE 1/2(HXP) ARE value ARE-1/2(HXP) 2(ARE/HXP)% TP ARE /TP (%) 11 3.511 3.556 0.045 101.27% 0.803 442.56% 12 3.511 3.513 0.002 100.07% 0.803 437.31% twenty one 3.511 3.647 0.136 103.87% 1.040 350.80% twenty two 3.511 3.514 0.003 100.08% 1.040 338.01% 31 3.468 3.553 0.085 102.45% 0.664 534.75% 32 3.468 3.543 0.075 102.15% 0.664 533.23% 41 3.062 3.368 0.305 109.96% 0.628 536.08% 42 2.990 3.154 0.164 105.48% 0.628 502.03% 51 2.875 3.195 0.320 111.13% 0.769 415.35% 52 2.717 3.081 0.364 113.38% 0.769 400.49% 61 2.731 2.779 0.047 101.73% 0.793 350.34% 62 2.972 2.994 0.022 100.72% 0.793 377.44% 71 3.153 3.227 0.074 102.33% 0.350 921.90% 72 3.220 3.230 0.010 100.31% 0.350 922.82% ARS EHD ARS value ARS-EHD (ARS/EHD)% TP ARS / TP (%) 11 3.850 3.902 0.052 101.36% 0.803 485.74% 12 3.742 3.746 0.003 100.08% 0.803 466.21% twenty one 3.557 3.693 0.136 103.83% 1.040 355.24% twenty two 3.520 3.523 0.003 100.08% 1.040 338.87% 31 3.468 3.553 0.085 102.45% 0.664 534.75% 32 3.468 3.543 0.075 102.15% 0.664 533.23% 41 3.062 3.368 0.305 109.96% 0.628 536.08% 42 2.990 3.154 0.164 105.48% 0.628 502.03% 51 2.875 3.195 0.320 111.13% 0.769 415.35% 52 2.717 3.081 0.364 113.38% 0.769 400.49% 61 2.731 2.779 0.047 101.73% 0.793 350.34% 62 2.972 2.994 0.022 100.72% 0.793 377.44% 71 3.153 3.227 0.074 102.33% 0.350 921.90% 72 3.220 3.230 0.010 100.31% 0.350 922.82%

According to Table 9 and Table 10, the following conditional formula values can be obtained: Fifth embodiment inverse curve related value (using the main reference wavelength of 940 nm) HIF111 1.7198 HIF111/HOI 0.5212 SGI111 0.2515 │SGI111∣/(│SGI111∣+TP1) 0.2384 HIF112 3.8276 HIF112/HOI 1.1599 SGI112 0.2909 │SGI112∣/(│SGI112∣+TP1) 0.2658 HIF121 1.6129 HIF121/HOI 0.4887 SGI121 0.0609 ∣SGI121│/(∣SGI121│+TP1) 0.0705 HIF122 3.0770 HIF122/HOI 0.9324 SGI122 0.1294 ∣SGI122│/(∣SGI122│+TP1) 0.1387 HIF123 3.5286 HIF123/HOI 1.0693 SGI123 0.1413 ∣SGI123│/(∣SGI123│+TP1) 0.1496 HIF211 3.0150 HIF211/HOI 0.9136 SGI211 0.5603 │SGI211∣/(│SGI211∣+TP2) 0.3502 HIF221 1.2598 HIF221/HOI 0.3818 SGI221 0.0461 ∣SGI221│/(∣SGI221│+TP2) 0.0425 HIF222 2.4869 HIF222/HOI 0.7536 SGI222 0.0921 ∣SGI222│/(∣SGI222│+TP2) 0.0814 HIF223 3.1621 HIF223/HOI 0.9582 SGI223 0.1214 ∣SGI223│/(∣SGI223│+TP2) 0.1046 HIF311 1.7161 HIF311/HOI 0.5200 SGI311 -0.3344 │SGI311∣/(│SGI311∣+TP3) 0.3348 HIF321 1.7553 HIF321/HOI 0.5319 SGI321 -0.3317 ∣SGI321│/(∣SGI321│+TP3) 0.3329 HIF322 3.1435 HIF322/HOI 0.9526 SGI322 -0.6300 ∣SGI322│/(∣SGI322│+TP3) 0.4867 HIF411 2.7914 HIF411/HOI 0.8459 SGI411 1.1052 │SGI411∣/(│SGI411∣+TP4) 0.6376 HIF421 1.1380 HIF421/HOI 0.3449 SGI421 0.2587 ∣SGI421│/(∣SGI421│+TP4) 0.2917 HIF422 1.8434 HIF422/HOI 0.5586 SGI422 0.4914 ∣SGI422│/(∣SGI422│+TP4) 0.4389 HIF423 2.6897 HIF423/HOI 0.8151 SGI423 0.8243 ∣SGI423│/(∣SGI423│+TP4) 0.5675 HIF511 2.4656 HIF511/HOI 0.7471 SGI511 1.0510 │SGI511∣/(│SGI511∣+TP5) 0.5774 HIF521 2.3776 HIF521/HOI 0.7205 SGI521 1.0234 ∣SGI521│/(∣SGI521│+TP5) 0.5709 HIF611 1.9504 HIF611/HOI 0.5910 SGI611 0.1086 │SGI611∣/(│SGI611∣+TP6) 0.1205 HIF621 1.2702 HIF621/HOI 0.3849 SGI621 -0.0901 ∣SGI621│/(∣SGI621│+TP6) 0.1020 HIF622 2.3880 HIF622/HOI 0.7236 SGI622 -0.1403 ∣SGI622│/(∣SGI622│+TP6) 0.1503 HIF711 1.9336 HIF711/HOI 0.5859 SGI711 -0.3155 │SGI711∣/(│SGI711∣+TP7) 0.4741 HIF721 0.6339 HIF721/HOI 0.1921 SGI721 0.0299 ∣SGI721│/(∣SGI721│+TP7) 0.0788 HIF722 2.5154 HIF722/HOI 0.7623 SGI722 -0.0251 ∣SGI722│/(∣SGI722│+TP7) 0.0669

Sixth embodiment Please refer to FIGS. 6A and 6B, in which FIG. 6A shows a schematic diagram of an optical imaging system according to the sixth embodiment of the present creation, and FIG. 6B is from left to right in order for the optical imaging system of the sixth embodiment. Graph of spherical aberration, astigmatism and optical distortion. FIG. 6C is a lateral aberration diagram of the optical imaging system of the sixth embodiment at a field of view of 0.7. As can be seen from FIG. 6A, the optical imaging system includes a first lens 610, an aperture 600, a second lens 620, a third lens 630, a fourth lens 640, a fifth lens 650, and a sixth lens 660 in order from the object side to the image side , A seventh lens 670, an infrared filter 680, an infrared imaging surface 690, and an image sensing element 692.

The first lens 610 has positive refractive power and is made of plastic material. Its object side 612 is convex, its image side 614 is concave, and both are aspherical, and its object side 612 and image side 614 both have a double inflection point.

The second lens 620 has a negative refractive power and is made of plastic. Its object side 622 is convex, its image side 624 is concave, and both are aspherical, and its object side 622 and image side 624 have an inflection point.

The third lens 630 has a positive refractive power and is made of plastic material. Its object side 632 is convex, its image side 634 is concave, and both are aspherical, its object side 632 has two inflexions and the image side 614 has an inverse Tune point.

The fourth lens 640 has a positive refractive power and is made of plastic material. Its object side 642 is convex, its image side 644 is concave, and both are aspherical, and its object side 642 and image side 644 both have a double inflection point.

The fifth lens 650 has positive refractive power and is made of plastic material. Its object side 652 is convex, its image side 654 is concave, and both are aspherical, and its object side 652 and image side 654 both have an inflection point.

The sixth lens 660 has a positive refractive power and is made of plastic material. Its object side 662 is concave, its image side 664 is convex, and both are aspherical, and its object side 662 has an inflection point and the image side 664 has two Recurve point. Thereby, the angle at which each field of view is incident on the sixth lens 660 can be effectively adjusted to improve aberration.

The seventh lens 670 has a negative refractive power and is made of plastic material. Its object side 672 is convex, its image side 674 is concave, and both are aspherical, and its object side 672 has an inflection point and the image side 674 has two Recurve point. In this way, it is beneficial to shorten the back focal length to maintain miniaturization. In addition, it can also effectively suppress the angle of incidence of the off-axis field of view, and can further correct the aberration of the off-axis field of view.

The infrared filter 680 is made of glass, which is disposed between the seventh lens 670 and the infrared imaging surface 690 and does not affect the focal length of the optical imaging system.

Please refer to Table 11 and Table 12 below. Table 11: Lens data of the sixth embodiment f (focal length) = 5.4554 mm; f/HEP = 1.0; HAF (half angle of view) = 30.7306 deg surface Radius of curvature Thickness (mm) Material Refractive index Dispersion coefficient focal length 0 Subject 1E+18 1E+18 1 First lens 7.403214857 0.636 plastic 1.661 20.39 16.166 2 23.98518038 0.492 3 aperture 1E+18 -0.192 4 Second lens 27.4566196 0.502 plastic 1.535 56.27 -9.745 5 4.332797437 0.141 6 Third lens 4.806045993 1.216 plastic 1.661 20.39 95.528 7 4.68719334 0.025 8 Fourth lens 1.919925537 0.404 plastic 1.661 20.39 183.635 9 1.789112884 0.195 10 Fifth lens 1.629179352 0.794 plastic 1.661 20.39 4.794 11 2.745525008 1.360 12 Sixth lens -15.5607797 1.103 plastic 1.661 20.39 3.090 13 -1.835123842 0.058 14 Seventh lens 4.668747528 0.496 plastic 1.636 23.89 -3.411 15 1.408817508 0.555 16 Infrared filter 1E+18 0.215 BK_7 1.517 64.2 17 1E+18 1.000 18 Infrared imaging surface 1E+18 0.000 The reference wavelength is 940 nm; the light blocking position is: the effective radius of the light passing through the 6th face is 3.052 mm; the effective radius of the light passing through the 7th face is 3.052 mm; the effective radius of the light passing through the 15th face is 3.100 mm; The exit pupil on the image side of the seventh lens serves as HXP Table 12. Aspheric coefficients of the sixth embodiment Table 12 Aspheric coefficients surface 1 2 4 5 6 7 8 k -6.471522E+00 5.017512E+01 8.468561E+01 1.519050E-01 -5.849631E-01 -4.323861E+01 -1.757211E+00 A4 -1.909932E-03 2.464708E-03 6.877273E-03 2.028632E-02 3.324090E-02 3.829457E-02 -3.272666E-02 A6 -2.183382E-03 -1.658762E-03 3.504253E-03 -1.388918E-02 -1.792549E-02 -2.778540E-02 1.959961E-02 A8 3.649789E-04 9.385835E-05 -1.485691E-03 3.750999E-03 4.378395E-03 7.458736E-03 -7.161591E-03 A10 -3.103639E-05 -1.741197E-06 2.773940E-04 -6.050352E-04 -6.921896E-04 -1.152818E-03 1.291453E-03 A12 2.599034E-06 2.546850E-06 -3.323699E-05 5.085651E-05 6.335653E-05 1.062509E-04 -1.204098E-04 A14 -1.795986E-07 -3.539700E-07 2.441048E-06 -1.934188E-06 -2.833287E-06 -5.362706E-06 5.498825E-06 A16 5.397901E-09 1.307455E-08 -9.297826E-08 1.919408E-08 4.355499E-08 1.130535E-07 -9.041571E-08 Table 12 Aspheric coefficients surface 9 10 11 12 13 14 15 k -4.449897E+00 -3.257344E+00 -6.344560E-02 -8.949906E+01 -5.814758E+00 -8.463555E+01 -7.439015E+00 A4 -3.315092E-02 8.706007E-03 1.968907E-02 3.833713E-03 1.024842E-02 -8.118480E-03 -2.173600E-02 A6 2.398266E-02 -9.662848E-05 -7.719420E-03 1.775964E-03 -1.218976E-02 -5.344868E-03 5.028822E-03 A8 -5.864643E-03 -1.825622E-03 -1.561896E-03 -2.571649E-03 6.468174E-03 2.793763E-03 -1.216120E-03 A10 5.288627E-04 1.007111E-03 1.266608E-03 1.287524E-03 -1.941318E-03 -6.347361E-04 2.135051E-04 A12 1.421727E-05 -2.261510E-04 -2.744341E-04 -2.919860E-04 3.690127E-04 7.790082E-05 -2.508976E-05 A14 -5.682184E-06 2.391817E-05 2.540394E-05 3.301279E-05 -3.734553E-05 -4.744222E-06 1.663485E-06 A16 2.790551E-07 -1.030034E-06 -9.176693E-07 -1.575743E-06 1.478237E-06 1.090987E-07 -4.480557E-08

In the sixth embodiment, the curve equation of the aspherical surface is expressed as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and will not be repeated here.

According to Table 11 and Table 12, the following conditional formula values can be obtained: Sixth embodiment (using the main reference wavelength of 940 nm) ∣f/f1│ ∣f/f2│ ∣f/f3│ ∣f/f4│ ∣f/f5│ ∣f/f6│ 0.3375 0.5598 0.0571 0.0297 1.1379 1.7654 ∣f/f7│ ΣPPR ΣNPR ΣPPR /│ΣNPR∣ IN12 / f IN67 / f 1.5996 3.3276 2.1594 1.5410 0.0550 0.0106 ∣f1/f2│ ∣f2/f3│ (TP1+IN12)/ TP2 (TP7+IN67)/ TP6 1.6589 0.1020 1.8638 0.5016 HOS InTL HOS / HOI InS/ HOS ODT% TDT% 8.8201 7.2297 2.6727 0.8721 1.7527 0.7735 HVT11 HVT12 HVT21 HVT22 HVT31 HVT32 2.0395 1.8794 2.6201 2.4199 2.4397 1.6489 HVT61 HVT62 HVT71 HVT72 HVT72/ HOI HVT72/ HOS 1.6216 2.1706 1.2956 2.1187 0.6420 0.2402 PSTA PLTA NSTA NLTA SSTA SLTA -0.020 mm 0.027 mm 0.020 mm -0.019 mm 0.024 mm 0.051 mm IN12 IN23 IN34 IN45 IN56 IN67 0.3001 mm 0.1412 mm 0.0250 mm 0.1946 mm 1.3599 mm 0.0576 mm

According to Table 11 and Table 12, the following values related to the length of the contour curve can be obtained: Sixth embodiment (using the main reference wavelength of 940 nm) ARE 1/2(HXP) ARE value ARE-1/2(HXP) 2(ARE/HXP)% TP ARE /TP (%) 11 2.845 2.854 0.009 100.30% 0.636 448.69% 12 2.845 2.848 0.003 100.11% 0.636 447.81% twenty one 2.845 2.906 0.061 102.14% 0.502 578.59% twenty two 2.845 2.942 0.097 103.42% 0.502 585.83% 31 2.845 2.910 0.065 102.29% 1.216 239.29% 32 2.845 2.912 0.067 102.34% 1.216 239.41% 41 2.845 3.026 0.181 106.36% 0.404 749.24% 42 2.801 3.018 0.216 107.73% 0.404 747.22% 51 2.645 2.996 0.351 113.29% 0.794 377.39% 52 2.628 2.913 0.284 110.82% 0.794 366.91% 61 2.552 2.568 0.016 100.62% 1.103 232.71% 62 2.698 2.797 0.099 103.67% 1.103 253.53% 71 2.845 2.856 0.011 100.37% 0.496 575.84% 72 2.845 2.908 0.063 102.20% 0.496 586.34% ARS EHD ARS value ARS-EHD (ARS/EHD)% TP ARS / TP (%) 11 3.569 3.586 0.018 100.49% 0.636 563.84% 12 3.288 3.291 0.004 100.11% 0.636 517.50% twenty one 2.873 2.943 0.070 102.45% 0.502 585.97% twenty two 3.036 3.207 0.171 105.64% 0.502 638.53% 31 3.052 3.117 0.065 102.13% 1.216 256.28% 32 3.052 3.142 0.090 102.96% 1.216 258.37% 41 2.929 3.122 0.193 106.60% 0.404 773.12% 42 2.801 3.018 0.216 107.73% 0.404 747.22% 51 2.645 2.996 0.351 113.29% 0.794 377.39% 52 2.628 2.913 0.284 110.82% 0.794 366.91% 61 2.552 2.568 0.016 100.62% 1.103 232.71% 62 2.698 2.797 0.099 103.67% 1.103 253.53% 71 2.951 2.962 0.011 100.39% 0.496 597.31% 72 3.100 3.179 0.079 102.56% 0.496 641.14%

According to Table 11 and Table 12, the following conditional formula values can be obtained: Sixth embodiment inverse curve related value (main reference wavelength 940 nm is used) HIF111 1.1749 HIF111/HOI 0.3560 SGI111 0.0820 │SGI111∣/(│SGI111∣+TP1) 0.1142 HIF112 2.6747 HIF112/HOI 0.8105 SGI112 0.1089 │SGI112∣/(│SGI112∣+TP1) 0.1462 HIF121 1.2408 HIF121/HOI 0.3760 SGI121 0.0336 ∣SGI121│/(∣SGI121│+TP1) 0.0502 HIF122 2.5783 HIF122/HOI 0.7813 SGI122 0.0180 ∣SGI122│/(∣SGI122│+TP1) 0.0275 HIF211 2.1407 HIF211/HOI 0.6487 SGI211 0.2634 │SGI211∣/(│SGI211∣+TP2) 0.3440 HIF221 1.6341 HIF221/HOI 0.4952 SGI221 0.3273 ∣SGI221│/(∣SGI221│+TP2) 0.3946 HIF311 1.5162 HIF311/HOI 0.4595 SGI311 0.2859 │SGI311∣/(│SGI311∣+TP3) 0.1903 HIF312 2.7512 HIF312/HOI 0.8337 SGI312 0.4723 │SGI312∣/(│SGI312∣+TP3) 0.2797 HIF321 0.9937 HIF321/HOI 0.3011 SGI321 0.0946 ∣SGI321│/(∣SGI321│+TP3) 0.0722 HIF411 1.5056 HIF411/HOI 0.4562 SGI411 0.4677 │SGI411∣/(│SGI411∣+TP4) 0.5366 HIF412 2.4486 HIF412/HOI 0.7420 SGI412 0.8386 │SGI412∣/(│SGI412∣+TP4) 0.6749 HIF421 1.9207 HIF421/HOI 0.5820 SGI421 0.6588 ∣SGI421│/(∣SGI421│+TP4) 0.6200 HIF422 2.7963 HIF422/HOI 0.8474 SGI422 1.0419 ∣SGI422│/(∣SGI422│+TP4) 0.7207 HIF511 2.1788 HIF511/HOI 0.6603 SGI511 1.0304 │SGI511∣/(│SGI511∣+TP5) 0.5648 HIF521 2.0340 HIF521/HOI 0.6164 SGI521 0.8280 ∣SGI521│/(∣SGI521│+TP5) 0.5105 HIF611 1.0243 HIF611/HOI 0.3104 SGI611 -0.0265 │SGI611∣/(│SGI611∣+TP6) 0.0235 HIF612 2.2118 HIF612/HOI 0.6702 SGI612 0.0111 │SGI612∣/(│SGI612∣+TP6) 0.0099 HIF621 1.4424 HIF621/HOI 0.4371 SGI621 -0.3745 ∣SGI621│/(∣SGI621│+TP6) 0.2534 HIF622 2.4861 HIF622/HOI 0.7534 SGI622 -0.5198 ∣SGI622│/(∣SGI622│+TP6) 0.3202 HIF711 0.6244 HIF711/HOI 0.1892 SGI711 0.0309 │SGI711∣/(│SGI711∣+TP7) 0.0586 HIF712 2.1949 HIF712/HOI 0.6651 SGI712 -0.0179 │SGI712∣/(│SGI712∣+TP7) 0.0349 HIF713 2.9170 HIF713/HOI 0.8839 SGI713 -0.0366 │SGI713∣/(│SGI713∣+TP7) 0.0688 HIF721 0.8213 HIF721/HOI 0.2489 SGI721 0.1633 ∣SGI721│/(∣SGI721│+TP7) 0.2477 HIF722 2.9374 HIF722/HOI 0.8901 SGI722 0.2348 ∣SGI722│/(∣SGI722│+TP7) 0.3213

Although this creation has been disclosed as above by way of implementation, it is not intended to limit this creation. Anyone who is familiar with this skill can make various changes and modifications within the spirit and scope of this creation, so the protection of this creation is protected The scope shall be determined by the scope of the attached patent application.

Although this creation has been specifically shown and described with reference to its exemplary embodiments, it will be understood by those of ordinary skill in the art that it does not deviate from the spirit of this creation as defined by the following patent applications and their equivalents Various changes in form and detail can be made under the category.

10,20,30,40,50,60: optical imaging system

100,200,300,400,500,600: aperture

110,210,310,410,510,610: the first lens

112,212,312,412,512,612: Object side

114,214,314,414,514,614: like profile

120,220,320,420,520,620: second lens

122,222,322,422,522,622: Object side

124,224,324,424,524,624: like side

130,230,330,430,530,630: third lens

132,232,332,432,532,632: object side

134,234,334,434,534,634: like profile

140,240,340,440,540,640: fourth lens

142,242,342,442,542,642: Object side

144,244,344,444,544,644: like side

150,250,350,450,550,650: fifth lens

152,252,352,452,552,652: Object side

154,254,354,454,554,654: like profile

160,260,360,460,560,660: sixth lens

162,262,362,462,562,662: Object side

164,264,364,464,564,664: like side

170,270,370,470,570,670: seventh lens

172,272,372,472,572,672: Object side

174,274,374,474,574,674: like profile

180,280,380,480,580,680: Infrared filter

190,290,390,490,590,690: infrared imaging surface

192,292,392,492,592,692: image sensing element

f: focal length of optical imaging system

f1: focal length of the first lens

f2: focal length of the second lens

f3: focal length of the third lens

f4: focal length of the fourth lens

f5: focal length of the fifth lens

f6: focal length of sixth lens

f7: focal length of the seventh lens

f/HEP: Aperture value of optical imaging system

HAF: half of the maximum angle of view of the optical imaging system

NA1: dispersion coefficient of the first lens

NA2, NA3, NA4, NA5, NA6, NA7: the dispersion coefficient of the second lens to the seventh lens

R1, R2: radius of curvature of the object side and image side of the first lens

R3, R4: radius of curvature of the object side and image side of the second lens

R5, R6: radius of curvature of the object side and image side of the third lens

R7, R8: radius of curvature of the object side and image side of the fourth lens

R9, R10: radius of curvature of the object side and image side of the fifth lens

R11, R12: radius of curvature of the object side and image side of the sixth lens

R13, R14: radius of curvature of the object side and image side of the seventh lens

TP1: the thickness of the first lens on the optical axis

TP2, TP3, TP4, TP5, TP6, TP7: the thickness of the second to seventh lenses on the optical axis

ΣTP: the sum of the thickness of all lenses with refractive power

IN12: the distance between the first lens and the second lens on the optical axis

IN23: the distance between the second lens and the third lens on the optical axis

IN34: the distance between the third lens and the fourth lens on the optical axis

IN45: the distance between the fourth lens and the fifth lens on the optical axis

IN56: the distance between the fifth lens and the sixth lens on the optical axis

IN67: The distance between the sixth lens and the seventh lens on the optical axis

InRS71: the horizontal displacement distance from the intersection point of the seventh lens object side on the optical axis to the maximum effective radius position of the seventh lens object side on the optical axis

IF711: the inflection point closest to the optical axis on the side of the seventh lens object

SGI711: IF711 subsidence amount

HIF711: the vertical distance between the reflex point closest to the optical axis and the optical axis on the side of the seventh lens object

IF721: the reflex point closest to the optical axis on the image side of the seventh lens

SGI721: IF721 subsidence

HIF721: the vertical distance between the reflex point closest to the optical axis on the image side of the seventh lens and the optical axis

IF712: the second inflection point close to the optical axis on the object side of the seventh lens

SGI712: IF712 subsidence amount

HIF712: the vertical distance between the second inflection point close to the optical axis of the seventh lens side and the optical axis

IF722: the second lens close to the optical axis on the image side of the seventh lens

SGI722: IF722 subsidence

HIF722: the vertical distance between the reflex point of the second lens side near the optical axis and the optical axis of the seventh lens

C71: Critical point on the side of the seventh lens object

C72: Critical point on the image side of the seventh lens

SGC71: The horizontal displacement distance between the critical point on the side of the seventh lens object and the optical axis

SGC72: The horizontal displacement distance between the critical point on the image side of the seventh lens and the optical axis

HVT71: The vertical distance between the critical point on the side of the seventh lens object and the optical axis

HVT72: The vertical distance between the critical point of the seventh lens image side and the optical axis

HOS: total height of the system (distance from the side of the first lens object to the infrared imaging surface on the optical axis)

InS: distance from aperture to infrared imaging surface

InTL: distance from the object side of the first lens to the image side of the seventh lens

InB: the distance from the image side of the seventh lens to the infrared imaging surface

HOI: The image sensor effectively senses half the diagonal length of the area (maximum image height)

TDT: TV Distortion of Optical Imaging System at the Formation of Image (TV Distortion)

ODT: Optical Distortion of Optical Imaging System at the End of Image Formation (Optical Distortion)

The above and other features of this creation will be explained in detail by referring to the drawings. FIG. 1A is a schematic diagram showing the optical imaging system of the first embodiment of the present creation; FIG. 1B is a graph showing the spherical aberration, astigmatism, and optical distortion of the optical imaging system of the first embodiment of the present invention in order from left to right; Figure 1C is a lateral aberration diagram of the meridional plane fan and sagittal plane fan of the optical imaging system according to the first embodiment of the present invention, the longest operating wavelength and the shortest operating wavelength passing through the edge of the aperture at 0.7 field of view; FIG. 2A is a schematic diagram showing the optical imaging system of the second embodiment of the present invention; Figure 2B is a graph showing the spherical aberration, astigmatism, and optical distortion of the optical imaging system of the second embodiment of the present invention in order from left to right; Figure 2C is a lateral aberration diagram of the meridional plane fan and sagittal plane fan of the optical imaging system according to the second embodiment of the present invention, the longest operating wavelength and the shortest operating wavelength passing through the edge of the aperture at the 0.7 field of view; FIG. 3A is a schematic diagram showing the optical imaging system of the third embodiment of the present invention; FIG. 3B shows the graphs of spherical aberration, astigmatism, and optical distortion of the optical imaging system of the third embodiment in this order from left to right; Figure 3C is a lateral aberration diagram of the meridional plane fan and sagittal plane fan of the optical imaging system according to the third embodiment of the present invention, the longest operating wavelength and the shortest operating wavelength passing through the edge of the aperture at the 0.7 field of view; FIG. 4A is a schematic diagram showing the optical imaging system of the fourth embodiment of the present invention; FIG. 4B shows the graphs of spherical aberration, astigmatism, and optical distortion of the optical imaging system of the fourth embodiment in this order from left to right; FIG. 4C is a lateral aberration diagram of the meridional plane fan and sagittal plane fan of the optical imaging system according to the fourth embodiment of the present invention, the longest operating wavelength and the shortest operating wavelength passing through the edge of the aperture at 0.7 field of view; FIG. 5A is a schematic diagram showing the optical imaging system of the fifth embodiment of the present invention; FIG. 5B shows the graphs of spherical aberration, astigmatism, and optical distortion of the optical imaging system of the fifth embodiment in this order from left to right; FIG. 5C is a lateral aberration diagram of the meridional plane fan and sagittal plane fan of the optical imaging system according to the fifth embodiment of the present invention, the longest operating wavelength and the shortest operating wavelength passing through the edge of the aperture at 0.7 field of view; FIG. 6A is a schematic diagram showing the optical imaging system of the sixth embodiment of the present invention; FIG. 6B shows the graphs of spherical aberration, astigmatism and optical distortion of the optical imaging system of the sixth embodiment of the present invention in order from left to right; FIG. 6C is a lateral aberration diagram of the meridional plane fan and the sagittal plane fan of the optical imaging system according to the sixth embodiment of the present invention. The longest operating wavelength and the shortest operating wavelength pass through the edge of the aperture at 0.7 field of view.

20: Optical imaging system

200: aperture

210: first lens

212: Object side

214: like side

220: second lens

222: Object side

224: like side

230: third lens

232: Object side

234: like side

240: fourth lens

242: Object side

244: like side

250: fifth lens

252: Object side

254: like side

260: sixth lens

262: Object side

264: like side

270: seventh lens

272: Object side

274: like side

280: Infrared filter

290: Infrared imaging surface

292: Image sensor

Claims (25)

An optical imaging system, in order from the object side to the image side, includes: A first lens with refractive power; A second lens with refractive power; A third lens with refractive power; A fourth lens with refractive power; A fifth lens with refractive power; A sixth lens with refractive power; A seventh lens with refractive power; and An infrared imaging surface, the optical imaging system has a maximum imaging height HOI on the infrared imaging surface, wherein the optical imaging system has seven lenses with refractive power, and at least one of the first lens to the seventh lens The lens has a positive refractive power, the focal length of the optical imaging system is f, the entrance pupil diameter of the optical imaging system is HEP, the exit pupil diameter of the seventh lens image side is HXP, the object side of the first lens reaches the infrared light imaging plane With a distance HOS on the optical axis, half of the maximum viewing angle of the optical imaging system is HAF. The optical imaging system has a maximum imaging height HOI perpendicular to the optical axis on the infrared imaging surface, which satisfies the following conditions: 0.5 ≦f/HEP≦1.8; 0 deg>HAF≦50 deg and 0.9≦2(ARE /HEP)≦2.0. The optical imaging system according to claim 1, wherein the wavelength of the infrared light is between 700 nm and 1300 nm and the first spatial frequency is represented by SP1, which satisfies the following condition: SP1≦440 cycles/mm. The optical imaging system according to claim 1, wherein the wavelength of the infrared light is between 850 nm and 960 nm and the first spatial frequency is represented by SP1, which satisfies the following condition: SP1≦220 cycles/mm. The optical imaging system according to claim 3, wherein the TV distortion of the optical imaging system at the time of image formation is TDT, wherein the optical imaging system has a maximum imaging height HOI perpendicular to the optical axis on the infrared imaging surface, the The longest working wavelength of the positive meridian plane fan of the optical imaging system passes the edge of the entrance pupil and is incident on the infrared light imaging plane. The lateral aberration at 0.7HOI is expressed by PLTA, and the shortest working wavelength of its positive meridian plane fan The lateral aberration passing through the edge of the entrance pupil and incident on the infrared light imaging plane at 0.7 HOI is represented by PSTA, and the longest operating wavelength of the negative meridian plane fan passes through the entrance pupil edge and is incident on the infrared light imaging plane. The lateral aberration at HOI is expressed in NLTA, and the shortest operating wavelength of the negative meridian plane fan passes through the entrance pupil edge and is incident on the infrared imaging surface. The lateral aberration at HOI is expressed in NSTA, and the sagittal plane fan The longest operating wavelength passes the edge of the entrance pupil and is incident on the infrared imaging surface. The lateral aberration at 0.7 HOI is expressed as SLTA, and the shortest operating wavelength of the sagittal fan passes through the entrance pupil edge and is incident on the infrared imaging surface The lateral aberration at 0.7 HOI is expressed by SSTA, which satisfies the following conditions: the longest operating wavelength is 960 nm; the shortest operating wavelength is 850 nm; PLTA≦100 μm; PSTA≦100 μm; NLTA≦100 μm; NSTA≦100 μm; SLTA≦100 microns; and SSTA≦100 microns; │TDT│> 100%. The optical imaging system according to claim 1, wherein the maximum effective radius of any surface of any one of the lenses is represented by EHD, and the intersection point of any surface of any of the lenses and the optical axis is the starting point, The contour of the surface is continued until the maximum effective radius of the surface is the end point. The length of the contour curve between the two points is ARS, which satisfies the following formula: 0.9≦ARS /EHD≦2.0. The optical imaging system according to claim 1, wherein the distance between the second lens and the second lens on the optical axis is IN23, and the distance between the fifth lens and the sixth lens on the optical axis is IN56, which meets the following conditions: IN56> IN23. The optical imaging system according to claim 1, wherein the distance between the third lens and the fourth lens on the optical axis is IN34, and the distance between the fifth lens and the sixth lens on the optical axis is IN56, which meets the following conditions: IN56> IN34. The optical imaging system according to claim 1, wherein the distance between the fourth lens and the fifth lens on the optical axis is IN45, and the distance between the fifth lens and the sixth lens on the optical axis is IN56, which meets the following conditions: IN56> IN45. The optical imaging system according to claim 1, further comprising an aperture, and a distance InS on the optical axis from the aperture to the infrared imaging surface, which satisfies the following formula: 0.2≦InS/HOS≦1.1. An optical imaging system, in order from the object side to the image side, includes: A first lens with refractive power; A second lens with refractive power; A third lens with refractive power; A fourth lens with refractive power; A fifth lens with refractive power; A sixth lens with refractive power; A seventh lens with refractive power; and An infrared light imaging surface, and at least one surface of at least one of the first lens to the seventh lens has at least one inflection point, wherein the optical imaging system has seven refractive power lenses, and the optical imaging system is The infrared imaging surface has a maximum imaging height HOI perpendicular to the optical axis, at least one of the first lens to the seventh lens has a positive refractive power, the focal length of the optical imaging system is f, and the incidence of the optical imaging system The pupil diameter is HEP, the distance from the object side of the first lens to the infrared imaging surface is a distance HOS on the optical axis, half of the maximum viewing angle of the optical imaging system is HAF, and the pupil diameter of the seventh lens image side is HXP , The intersection of any surface of any of these lenses with the optical axis is the starting point, and the contour of the surface is extended until the coordinate point on the surface at a vertical height of 1/2 HXP from the optical axis, between the aforementioned two points The length of the profile curve is ARE, which satisfies the following conditions: 0.5≦f/HEP≦1.5; 0 deg>HAF≦50 deg; and 0.9≦2(ARE /HEP)≦2.0. The optical imaging system according to claim 10, wherein the maximum effective radius of any surface of any one of the lenses is represented by EHD, and the intersection point of any surface of any of the lenses and the optical axis is the starting point, The contour of the surface is continued until the maximum effective radius of the surface is the end point. The length of the contour curve between the two points is ARS, which satisfies the following formula: 0.9≦ARS /EHD≦2.0. The optical imaging system according to claim 10, wherein the optical imaging system has a maximum imaging height HOI perpendicular to the optical axis on the infrared imaging surface, which satisfies the following condition: 0.5≦HOS/HOI≦4. The optical imaging system according to claim 10, further comprising an aperture, the aperture being located in front of the image side of the third lens. The optical imaging system according to claim 10, wherein the image side of the first lens is concave on the optical axis. The optical imaging system according to claim 10, wherein the object side of the second lens is convex on the optical axis. The optical imaging system according to claim 10, wherein the object side of the fourth lens is convex on the optical axis and the image side is concave on the optical axis. The optical imaging system according to claim 10, wherein the object side of the fifth lens is convex on the optical axis and the image side is concave on the optical axis. The optical imaging system according to claim 10, wherein at least one of the first lens to the seventh lens is made of plastic material. The optical imaging system according to claim 10, wherein all of the first lens to the seventh lens are made of plastic. An optical imaging system, in order from the object side to the image side, includes: A first lens with refractive power; A second lens with refractive power; A third lens with refractive power; A fourth lens with refractive power; A fifth lens with refractive power; A sixth lens with refractive power; A seventh lens with refractive power; and An infrared light imaging surface, and at least two of the first lens to the seventh lens, at least one surface of each of which has at least one inflection point, wherein the optical imaging system has seven lenses with refractive power, the optical imaging The system has a maximum imaging height HOI perpendicular to the optical axis on the infrared imaging surface, the focal length of the optical imaging system is f, the entrance pupil diameter of the optical imaging system is HEP, and half of the maximum viewing angle of the optical imaging system is HAF , The distance from the object side of the first lens to the imaging surface of the infrared light has a distance HOS on the optical axis, the exit pupil diameter of the image side of the seventh lens is HXP, the intersection of any surface of any of the lenses and the optical axis As a starting point, the contour of the surface is continued until the coordinate point on the surface at a vertical height of 1/2 HXP from the optical axis. The length of the contour curve between the two points is ARE, which meets the following conditions: 0.5≦f/HEP ≦1.4; 0 deg>HAF≦45 deg; and 0.9≦2(ARE /HEP)≦2.0. The optical imaging system according to claim 20, wherein the optical imaging system satisfies the following formula: 0 mm>HOS≦20 mm. The optical imaging system according to claim 20, wherein the wavelength of the infrared light is between 850 nm and 960 nm and the first spatial frequency is represented by SP1, which satisfies the following condition: SP1≦220 cycles/mm. The optical imaging system according to claim 20, wherein the materials of the first lens to the seventh lens are plastic. The optical imaging system according to claim 20, wherein the distance between the second lens and the third lens on the optical axis is IN23, and the distance between the third lens and the fourth lens on the optical axis is IN34, the distance between the fourth lens and the fifth lens on the optical axis is IN45, and the distance between the fifth lens and the sixth lens on the optical axis is IN56, which satisfies the following conditions: IN56>IN23 ; IN56> IN34; and IN56> IN45. The optical imaging system according to claim 20, wherein the optical imaging system further includes an aperture and an image sensing element, the image sensing element is disposed behind the infrared imaging surface and at least 100,000 pixels are disposed, and The aperture to the infrared light imaging surface has a distance InS on the optical axis, which satisfies the following formula: 0.2≦InS/HOS≦1.1.

Images