CN209433108U - A kind of day and night confocal optics camera lens - Google Patents

Abstract

The utility model discloses a kind of day and night confocal optics camera lenses, including are disposed with since object space: diaphragm STOP face S1；First lens G1, the first face are S2, and the second face is S3；Second lens G2, the first face are S4, and the second face is S5；The third lens G3, the first face are S5, and the second face is S6, and it is cemented surface that second lens G2 the second face S5, which is S5 with the first face the third lens G3,；4th lens G4, the first face are S7, and the second face is S8；Optical filter IR.Day and night confocal optics camera lens the first lens G1 is falcate glass spherical lens, second lens G2 is lenticular or convexo-plane spherical glass lens, the third lens G3 is falcate spherical glass lens, 4th lens G4 is the spherical glass lens with positive light coke, second lens G2 and the third lens G3 are combined into the balsaming lens with positive light coke, it is possible thereby to realize day and night confocal effect high-definition.

Description

A kind of day and night confocal optics camera lens

Technical field

The utility model relates to optical lens technology fields, and in particular to a kind of that day and night confocal optical frames may be implemented Head.

Background technique

With society development and science and technology progress, automobile driving safe more and more attention has been paid to, it is especially long-distance drive, Fatigue driving etc. all causes major hidden danger safely to personal and autre vie, therefore driver fatigue monitor system comes into being. Driver fatigue monitor system identifies physiological driver's state based on the facial characteristics of driver, it is therefore necessary to be clapped by camera It takes the photograph, camera lens must be used in camera.The camera lens that driver fatigue monitor system uses at present cannot take into account daytime and night uses, Night using when cause early warning not accurate enough because of the reason of camera.

Utility model content

The technical issues of the utility model solves is that it is soluble day and night to provide one kind for the deficiency in background technique Confocal optical lens.

In order to solve the above technical problems, the technical solution of the utility model is: a kind of day and night confocal optics camera lens, including from Diaphragm that object space is set gradually to image space, the second lens with positive light coke, has the first lens of falcate for being convex to image space The third lens of negative power and the 4th lens with positive light coke, wherein the second lens and the third lens, which are combined into, to be had just The balsaming lens of focal power.

Further, the focal length and optical lens for the balsaming lens that the second lens of the camera lens and the third lens are combined into Meet 2≤f23/f≤4.5 between effective focal length value, wherein f23 is the second lens and the balsaming lens that the third lens are combined into Focal length value, f are the effective focal length value of optical lens.

Further, the 4th focal length of lens value of the camera lens meets 2≤f4/f≤4.5, and wherein f4 is the 4th lens Focal length value, f are the effective focal length value of optical lens.

Further, the first lens material of the camera lens meets Nd >=1.80, Vd >=20, and the second lens material meets Nd >=1.6, Vd>=40, the third lens material meet Nd>=1.8, Vd<30, and the 4th lens material meets Nd>=1.50, Vd>=40, Middle Nd is the d optical index of lens material, and Vd is the d light Abbe constant of lens material.

Further, meet ttl/f≤3.6 between the optics overall length and effective focal length value of the optical lens, wherein ttl For lens optical overall length, f is the effective focal length value of camera lens.

Further, the imaging viewing field angle FOV range of the camera lens is 60 ° < FOV < 100 °.

It further, further include optical filter, last end position from the object side to the image side is arranged in the optical filter.

Further, first lens (G1), the second lens, the third lens and the 4th lens are spherical mirror.

Beneficial effect of the utility model is mainly by the following: provide it is a kind of by four eyeglasses form day and night altogether Zoom lens, diaphragm, which is located at camera lens front end, can effectively reduce camera lens front end bore, realize " pin hole " effect, and the first lens G1 can have The effect correction curvature of field and astigmatism, the balsaming lens that the second lens G2 and the third lens G3 are combined into can effectively correct spectrum spherochromatism, To realize the confocal function of visible light and infrared light, and it can effectively solve the problems, such as purple boundary, the 4th lens G4 corrects remaining picture Difference realizes that high definition parses power；It is possible thereby to realize day and night confocal effect high-definition.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of day and night confocal optics camera lens in the utility model embodiment one；

Fig. 2 is the MTF curve figure of optical lens in embodiment one；

Fig. 3 is the point range figure of optical lens in embodiment one；

Fig. 4 is the curvature of field and distortion figure of optical lens in embodiment one；

Fig. 5 is the spherical aberration curve graph of optical lens in embodiment one.

The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；In order to better illustrate this embodiment, attached Scheme certain components to have omission, zoom in or out, does not represent the size of actual product；To those skilled in the art, The omitting of some known structures and their instructions in the attached drawings are understandable；The same or similar label corresponds to same or similar Component；The terms describing the positional relationship in the drawings are only for illustration, should not be understood as the limitation to this patent.

Specific embodiment

In order to facilitate the understanding of those skilled in the art, below in conjunction with attached drawing and embodiment to the utility model carry out into One step detailed description.

A kind of day and night confocal optics camera lens, including set gradually from the object side to the image side diaphragm STOP, be convex to the curved of image space Month the first lens of shape G1, the second lens G2 with positive light coke, the third lens G3 with negative power and there is positive light focus 4th lens G4 of degree, wherein the second lens G2 and the third lens G3 are combined into the balsaming lens with positive light coke.This implementation Four imaging lens are used only in example can realize day and night confocal function, can reduce the cost of camera lens；Wherein diaphragm is located at Camera lens front end can effectively reduce camera lens front end bore, realize " pin hole " effect.First lens G1 can effectively correct the curvature of field and as It dissipates, the balsaming lens that the second lens G2 and the third lens G3 are combined into can effectively correct spectrum spherochromatism, to realize visible light With the confocal function of infrared light, and purple boundary can be effectively solved the problems, such as, the 4th lens G4 corrects residual aberration, realizes high definition parsing Power.

First lens G1 material of the camera lens meets Nd >=1.80, Vd >=20, the second lens G2 material meet Nd >= 1.6, Vd>=40, the third lens G3 material meet Nd>=1.8, Vd<30, and the 4th lens G4 material meets Nd>=1.50, Vd>=40, Wherein Nd is the d optical index of lens material, and Vd is the d light Abbe constant of lens material.The optics overall length of the optical lens Meet ttl/f≤3.6 between effective focal length value, wherein ttl is lens optical overall length, and f is the effective focal length value of camera lens.It is described The imaging viewing field angle FOV range of camera lens is 60 ° < FOV < 100 °.It is possible thereby to further provide for the day and night confocal of optical lens Performance.

The focal length and optical lens for the balsaming lens that the second lens G2 and the third lens G3 of the camera lens are combined into are effective Meet 2≤f23/f≤4.5 between focal length value.4th lens G4 focal length value of the camera lens meets 2≤f4/f≤4.5, wherein F23 is the focal length value for the balsaming lens that the second lens G2 and the third lens G3 are combined into, and f4 is the focal length value of the 4th lens G4, f For the effective focal length value of optical lens.It is possible thereby to keep the miniaturization of camera lens volume and fine definition.

In addition, optical lens further includes optical filter IR, rearmost end position from the object side to the image side is arranged in the optical filter IR It sets, different shooting effects may be implemented by IR optical filter.IR optical filter can select as needed visible light single-pass optical filter, Infrared light single-pass optical filter or visible light and infrared band bilateral optical filter.

The first lens G1, the second lens G2, the third lens G3 and the 4th lens G4 of the camera lens can use spherical surface Mirror, so that the camera lens is more easier to make, production cost is also lower.

Embodiment one

Refering to fig. 1, a kind of day and night confocal optics camera lens comprising be disposed with since object space: diaphragm STOP face S1； First lens G1, the first face are S2, and the second face is S3；Second lens G2, the first face are S4, and the second face is S5；Third is saturating Mirror G3, the first face are S5, and the second face is S6, and second lens G2 the second face S5 and the first face the third lens G3 are that S5 is glued Face；4th lens G4, the first face are S7, and the second face is S8；Optical filter IR.The first lens of day and night confocal optics camera lens G1 For falcate glass spherical lens, the second lens G2 is lenticular or convexo-plane spherical glass lens, and the third lens G3 is bent moon Shape spherical glass lens, the 4th lens G4 are the spherical glass lens with positive light coke, the second lens G2 and the third lens G3 It is combined into the balsaming lens with positive light coke.

The material and specification of the mirror surface of each eyeglass make according to the parameter in table 1, and can satisfy following requirement: first thoroughly Mirror G1 material meets Nd >=1.80, Vd >=20, and the second lens G2 material meets Nd >=1.6, Vd >=40, and the third lens G3 material is full Sufficient Nd>=1.8, Vd<30, the 4th lens G4 material meet Nd>=1.50, Vd>=40, the optics overall length of optical lens and effectively coke Away from ttl/f≤3.6 is met between value, f is the effective focal length value of camera lens.The imaging viewing field angle FOV range of the camera lens is 60 ° < FOV < 100 °, the focal length of the balsaming lens that the second lens G2 and the third lens G3 are combined into and optical lens effective focal length value it Between meet 2≤f23/f≤4.5.

The material and specifications parameter of the mirror surface of each eyeglass of table 1

The camera lens effective focal length value f of the embodiment is that the gluing that 3.65mm, the second lens G2 and the third lens G3 are formed is saturating The focal length value f23 of mirror is 12mm, and the focal length value f4 of the 4th lens G4 is 11mm, and optics overall length ttl is 12mm, and field angle FOV is 80 °, f23/f=3.29, f4/f=3.01, ttl/f=3.29.The applicable imaging spectral wave-length coverage of the camera lens be 380nm ~ 980nm, it is seen that light (central wavelength 550nm) and infrared light (central wavelength 940nm) focusing offset meet day and night confocal camera lens Requirement.Fig. 2 is the MTF curve figure of the optical lens, and Fig. 3 is the point range figure of the optical lens, and Fig. 4 is the field of the optical lens Bent and distortion figure, Fig. 5 are the spherical aberration curve graph of the optical lens.As can be seen that the camera lens has good light from Fig. 2 ~ Fig. 5 Performance is learned, confocal image high-definition can be formed under visible light and infrared luminous environment, have good day and night confocal Performance.

Obviously, the above embodiments of the present invention is merely examples for clearly illustrating the present invention, and It is not limitations of the embodiments of the present invention.For those of ordinary skill in the art, in above description On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments Exhaustion.Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention etc., should be included in Within the protection scope of the utility model claims.

Claims (8)

1. a kind of day and night confocal optics camera lens, it is characterised in that: including being disposed with diaphragm from the object side to the image side, being convex to image space The first lens of falcate (G1), the second lens (G2) with positive light coke, the third lens (G3) with negative power and The 4th lens (G4) with positive light coke, wherein the second lens (G2) and the third lens (G3) are combined into positive light coke Balsaming lens.

2. day and night confocal optics camera lens according to claim 1, it is characterised in that: the second lens (G2) of the camera lens and Meet 2≤f23/f≤4.5 between the focal length and optical lens effective focal length value of the balsaming lens that the third lens (G3) are combined into, The focal length value for the balsaming lens that wherein f23 is the second lens (G2) and the third lens (G3) are combined into, f are the effective of optical lens Focal length value.

3. day and night confocal optics camera lens according to claim 2, it is characterised in that: the 4th lens (G4) of the camera lens are burnt Meet 2≤f4/f≤4.5 away from value, wherein f4 is the focal length value of the 4th lens (G4), and f is the effective focal length value of optical lens.

4. day and night confocal optics camera lens according to claim 1, it is characterised in that: the first lens (G1) material of the camera lens Material meets Nd >=1.80, Vd >=20, and the second lens (G2) material meets Nd >=1.6, Vd >=40, and the third lens (G3) material meets Nd>=1.8, Vd<30, the 4th lens (G4) material meet Nd>=1.50, Vd>=40, and wherein Nd is the d anaclasis of lens material Rate, Vd are the d light Abbe constant of lens material.

5. day and night confocal optics camera lens according to claim 2 or 3, it is characterised in that: the optics of the optical lens is total Meet ttl/f≤3.6 between long and effective focal length value, wherein ttl is lens optical overall length, and f is the effective focal length value of camera lens.

6. day and night confocal optics camera lens according to claim 5, it is characterised in that: the imaging viewing field angle of the camera lens FOV range is 60 ° < FOV < 100 °.

7. day and night confocal optics camera lens according to claim 1, it is characterised in that: further include optical filter (IR), the filter Last end position from the object side to the image side is arranged in mating plate (IR).

8. according to claim 1 ~ 4,6,7 described in any item day and night confocal optics camera lenses, it is characterised in that: first lens (G1), the second lens (G2), the third lens (G3) and the 4th lens (G4) are spherical lens.