CN207424359U - A kind of big vehicle-mounted Optical devices of target surface ultra-wide angle high definition of large aperture - Google Patents

Abstract

The utility model discloses a kind of vehicle-mounted Optical devices of high definition of the big target surface ultra-wide angle of large aperture, the present apparatus includes the first lens L1 of convex-concave negative power set gradually along light incident direction, the second lens L2 of concave-concave negative power, the 3rd lens L3 of convex-concave positive light coke, the 4th lens L4 of concave-convex positive light coke, the 5th lens L5 of concave-convex negative power, the 6th lens L6 of biconvex positive light coke；Wherein, 4th lens L4 and the 5th lens L5 is mutually glued to form compound lens, wherein, the axial distance of the lens L1 and L2 of the Optical devices is 3.23mm, the axial distance of the lens L2 and L3 is 2.11mm, the axial distance of the lens L3 and L4 is 2.61mm, and the axial distance of the lens L5 and L6 is 0.11mm.This Optical devices, and pass through makes lens construction compact while reasonably distribution focal power increases image planes size (Φ 7.334mm) and field angle (120 ° of@H2.688mm), it is at low cost.This product brightness height (F1.8) meets 2Mega high definition image qualities.

Description

A kind of big vehicle-mounted Optical devices of target surface ultra-wide angle high definition of large aperture

Technical field

The utility model relates generally to a kind of Optical devices.

Background technology

In recent years, as people are more and more stronger to the safe driving demand of motor vehicles, on-vehicle lens have obtained rapidly Development, while the universal resolution ratio of such focal length section camera lens (focal length 2.8mm) on the market is not high at present, is generally concentrated at million Below pixel, and aperture, image planes and field angle are not big enough, even realize large aperture effect cause lens construction it is complicated, into The defects of this is higher.Consider from every aspects such as security, stability and competitiveness, the adaptive capacity to environment of system is also required to simultaneous It cares for.Therefore, a large aperture, wide-angle, big target surface, low cost and the good high definition optical imaging device of thermal stability are designed just Seem very necessary.

Utility model content

The utility model is related to mainly for vehicle-mounted monitoring large aperture and ensure -40 DEG C~135 DEG C not defocus and Disappear the Optical devices of purple boundary.

To reach more than design requirement, the technical scheme that the utility model is provided is as follows：

A kind of focal length is the full glass structures of 6G of 2.8mm and high/low temperature is confocal and Optical devices without purple boundary phenomenon, feature It is the first lens L1, the second lens of concave-concave negative power of the convex-concave negative power set gradually along light incident direction L2, the 3rd lens L3 of convex-concave positive light coke, the 4th lens L4 of concave-convex positive light coke, the 5th lens of concave-convex negative power The 6th lens L6 of L5, biconvex positive light coke；

Wherein, the axial distance of the lens L1 and L2 of the Optical devices is 3.23mm, the lens L2's and L3 Axial distance is 2.11mm, and the axial distance of the lens L3 and L4 is 2.61mm, and the axial distance of the lens L5 and L6 is 0.11mm。

Preferably, the 4th lens L4 and the 5th lens L5 is mutually glued forms compound lens.The six-element lens of the device Focal length, refractive index, radius of curvature and lens thickness meet the following conditions respectively：

Table 1

In upper table：" f " be refractive index, " n " be refractive index, " R " be radius of curvature, " d " be lens thickness, bottom right mark " 1, 2,3.. " correspond to lens, and " L1, L2, L3... ", "-" represent that direction is negative direction.

In summary, which must also meet the axial distance of the lens L1 and L2 for 3.23mm, described The axial distance of mirror L2 and L3 are 2.11mm, and the axial distance of the lens L3 and L4 is 2.61mm, the lens L5's and L6 Axial distance is 0.11mm.

The design mainly adjusts the focal length value of 6 pieces of 4 groups of lens by controlling.

I.e. -2<f12/f<0；

1<f3/f<3；

5.5<f45/f<7.5；

2<f6/f<4.5；

Wherein, wherein, f is the focal length of entire optical system, and f12 is the combined focal length of the first lens and the second lens, f3, F6 is respectively the focal length of the 3rd lens and the 6th lens, and f45 is the combined focal length of the 4th lens and the 5th lens.

In addition, the Optical devices of the utility model also meet：

φ12<0；

φ3>0；

φ45>0；

φ6>0；

Wherein,For the combination focal power of the first lens and the second lens,Respectively the 3rd lens and The combination focal power of six lens,For the combination focal power of the 4th lens and the 5th lens.

The focal length value of each piece of lens sees the above table 1.

It is effective ensure the utility model can in -40 DEG C~135 DEG C of temperature change not defocus.And it reasonably uses The focal power of lens materials and each eyeglass of adjustment can eliminate purple boundary and promote edge image quality well, ensure very high imaging product Matter.

Description of the drawings

Fig. 1 is the lens assembling figure of the utility model；

Fig. 2 is the Optical devices figure of the utility model；

Fig. 3, which is that the wavelength VS of the utility model is burnt, moves figure；

Fig. 4 is 20 DEG C of MTF curve figures of the utility model room temperature；

Fig. 5 is -40 DEG C of MTF curve figures of the utility model low temperature；

Fig. 6 is 135 DEG C of MTF curve figures of the utility model high temperature.

Specific embodiment

Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.It can manage Solution, specific embodiment described herein are used only for explaining the utility model rather than the restriction to the utility model.Separately It is outer it should also be noted that, illustrate only for ease of description, in attached drawing with the relevant part of the utility model and it is not all in Hold.

See Fig. 1 and Fig. 2, the utility model includes the first of the convex-concave negative power set gradually along light incident direction thoroughly Mirror L1, the second lens L2 of concave-concave negative power, the 3rd lens L3 of convex-concave positive light coke, concave-convex positive light coke the 4th thoroughly The 5th lens L5, the 6th lens L6 of biconvex positive light coke of mirror L4, concave-convex negative power；Wherein, the 4th lens L4 and the 5th Lens L5 is mutually glued to form compound lens.The lens L1 includes opposite R1 faces and R2 faces, and the lens L2 includes opposite R3 faces and R4 faces, the lens L3 include opposite R5 faces and R6 faces, the lens L4 include opposite R7 faces and R8 faces, The lens L5 includes opposite R8 faces and R9 faces, and the lens L6 includes opposite R10 faces and R11 faces.

Embodiment one

When the focal length of the six-element lens of the utility model, the radius of curvature of refractive index and two pieces of glass lens, thickness meet During 1 condition of table, while meet the axial distance of the lens L1 and L2 for 3.23mm, the axial distance of the lens L2 and L3 is The axial distance of 2.11mm, the lens L3 and L4 are 2.61mm, and the axial distance of the lens L5 and L6 is 0.11mm, is hung down Axis aberration is shown in Fig. 3, it is seen that the defocusing amount of purple light is smaller, and purple boundary problem has obtained good solution.

Embodiment two

When focal length, refractive index, radius of curvature, the thickness of eight lens of the utility model meet table 1, by Fig. 4, figure 5th, Fig. 6, which can be seen that, is located at MTF curve under the maximum conditions such as 20 degrees Celsius of room temperature, subzero 40 DEG C of low temperature, 135 DEG C of high temperature above freezing All without there is serious defocus phenomenon.

Wherein, portion identification can be found in following explanations in Fig. 3-6.

MODULUS OF THE OTF --- modulation transfer function (MTF) value

SPATIAL FREQUENCY IN CYCLES PER MM --- every millimeter of demand pairs of spatial frequency these are only this The preferred embodiment of utility model, is not intended to limit the utility model, within the spirit and principle of the utility model, institute Any modification, equivalent substitution, improvement and etc. of work, should be included within the scope of protection of this utility model.

Claims (5)

1. a kind of big vehicle-mounted Optical devices of target surface ultra-wide angle high definition of large aperture, the present apparatus includes setting gradually along light incident direction The first lens L1 of convex-concave negative power, the second lens L2 of concave-concave negative power, convex-concave positive light coke the 3rd lens L3, The 5th lens L5, the 6th lens L6 of biconvex positive light coke of 4th lens L4 of concave-convex positive light coke, concave-convex negative power；Its In, the 4th lens L4 and the mutually glued formation compound lens of the 5th lens L5；

Wherein, the axial distance of the lens L1 and L2 of the Optical devices be 3.23mm, the axial direction of the lens L2 and L3 Distance is 2.11mm, and the axial distance of the lens L3 and L4 is 2.61mm, and the axial distance of the lens L5 and L6 is 0.11mm。

2. Optical devices as described in claim 1, which is characterized in that each lens of the Optical devices meet following condition：

-2<f12/f<0；

1<f3/f<3；

5.5<f45/f<7.5；

2<f6/f<4.5；

Wherein, f is the focal length of entire optical system, and f12 is the combined focal length of the first lens and the second lens, and f3, f6 are respectively The focal length of 3rd lens and the 6th lens, f45 are the combined focal length of the 4th lens and the 5th lens.

3. Optical devices as described in claim 1, which is characterized in that meet following condition：

Wherein,For the combination focal power of the first lens and the second lens,Respectively the 3rd lens and the 6th are thoroughly The combination focal power of mirror,For the combination focal power of the 4th lens and the 5th lens.

4. Optical devices as described in claim 1, it is characterised in that：The Optical devices are described also comprising a device diaphragm Device diaphragm is between the 3rd lens L3 and the 4th lens L4.

5. Optical devices as described in claim 1, which is characterized in that the Optical devices meet：