CN206321860U - Five-element wide-angle lens - Google Patents

Abstract

The utility model discloses a five-piece wide-angle lens, which comprises an aperture, a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side in sequence, wherein the first lens has positive refractive power, the object side surface is convex and the image side surface is convex, the second lens has negative refractive power, the object side surface is convex and the image side surface is concave, the third lens has negative refractive power, the object side surface is convex and the image side surface is concave, the fourth lens has positive refractive power, the object side surface is concave and the image side surface is convex, the fifth lens has negative refractive power, the object side surface is convex and the image side surface is concave, the five-piece wide-angle lens meets the conditional expression that F/R1 is more than 0 and less than 1.5, wherein F is the system focal length of the five-piece wide-angle lens, and R1 is the radius of curvature of the object-side surface of the first lens.

Description

Five-element wide-angle lens

technical field

The utility model relates to an optical lens, in particular to a five-piece lens with wide-angle characteristics.

Background technique

In recent years, with the rise of electronic products with photographic functions, the demand for optical systems has increased day by day, making the demand for wide-angle lenses with high resolution also greatly increased. Wide-angle lenses refer to lenses with shorter focal lengths and larger viewing angles. A longer depth of field can accommodate a wider range of scenes, and can increase the spatial depth of the picture.

In the improvement of wide-angle lens, in order to facilitate portability and improve recording quality, the industry needs to consider how to maintain good imaging quality at a wider viewing angle when designing a wide-angle lens. Therefore, how to provide a wide-angle lens that can combine multiple features It is worthy of consideration by those in the field.

Utility model content

In view of this, the main purpose of the present utility model is to provide a wide-angle lens with good optical performance.

In order to achieve the above purpose, the utility model provides a five-piece wide-angle lens, wherein, along an optical axis from the object side to the image side, sequentially include:

an aperture;

A first lens with positive refractive power, the object side is convex and the image side is convex;

a second lens with negative refractive power, the object side is convex and the image side is concave;

a third lens with negative refractive power, the object side is convex and the image side is concave;

a fourth lens, having positive refractive power, with a concave surface on the object side and a convex surface on the image side; and

a fifth lens with negative refractive power, the object side is convex and the image side is concave;

The five-piece wide-angle lens satisfies the conditional formula of 0<F/R1<1.5, wherein F is the system focal length of the five-piece wide-angle lens, and R1 is the radius of curvature of the object side surface of the first lens.

In order to achieve the above purpose, the utility model also provides a five-piece wide-angle lens, wherein, along an optical axis from the object side to the image side, sequentially include:

an aperture;

A first lens with positive refractive power, the radius of curvature on the object side is R1, and the radius of curvature on the image side is R2, wherein R1>0 and R1>R2;

A second lens with negative refractive power, the radius of curvature on the object side is R3, and the radius of curvature on the image side is R4, wherein R3>R4;

A third lens with negative refractive power, the radius of curvature on the object side is R5, and the radius of curvature on the image side is R6, wherein R5>0 and R5>R6;

A fourth lens with positive refractive power, the radius of curvature on the object side is R7, and the radius of curvature on the image side is R8, wherein R7<0 and R7<R8; and

A fifth lens with negative refractive power, the radius of curvature on the object side is R9, and the radius of curvature on the image side is R10, wherein R9>0 and R9>R10;

The five-piece wide-angle lens satisfies the conditional formula of 0<F/R1<1.5, wherein F is the system focal length of the five-piece wide-angle lens, and R1 is the radius of curvature of the object side surface of the first lens.

The above-mentioned five-piece wide-angle lens further satisfies the conditional expression of Gaa/T7<1, wherein Gaa is the sum of the gaps between the lenses on the optical axis, and T7 is the thickness of the fourth lens on the optical axis.

The above-mentioned five-piece wide-angle lens further satisfies the conditional expression of Gaa/T3<2.5, wherein Gaa is the sum of the gaps between the lenses on the optical axis, and T3 is the thickness of the second lens on the optical axis.

The above-mentioned five-piece wide-angle lens further satisfies the conditional expression of Gaa/T5<2.1, wherein Gaa is the sum of the gaps between the lenses on the optical axis, and T5 is the thickness of the third lens on the optical axis.

The above-mentioned five-piece wide-angle lens further satisfies the conditional expression of sagR7/R7<0.3, wherein sagR7 is the vertical distance between the object side of the fourth lens radially outward from the optical axis to the maximum effective diameter of the object side of the fourth lens. degree distance, R7 is the radius of curvature of the object side surface of the fourth lens.

The aforementioned five-element wide-angle lens further satisfies the conditional formula 13<R3*R4<27, wherein R3 is the radius of curvature of the object side of the second lens, and R4 is the radius of curvature of the image side of the second lens.

The above-mentioned five-piece wide-angle lens further satisfies the conditional formula 1<R7*R8<2.1, wherein R7 is the radius of curvature of the object side of the fourth lens, and R8 is the radius of curvature of the image side of the fourth lens.

The above-mentioned five-piece wide-angle lens further satisfies the conditional expressions of 1.1≤R1/F≤1.2 and -0.7≤R2/F≤-0.6, wherein F is the system focal length value of the five-piece wide-angle lens, and R1 is the first The radius of curvature of the object side of the lens, R2 is the radius of curvature of the image side of the first lens.

The above-mentioned five-piece wide-angle lens further satisfies the conditional expressions of 2.1≤R3/F≤3.4 and 0.6≤R4/F≤0.8, wherein F is the system focal length value of the five-piece wide-angle lens, and R3 is the value of the second lens The radius of curvature of the object side, R4 is the radius of curvature of the image side of the second lens.

The above-mentioned five-piece wide-angle lens further satisfies the conditional expressions of 1.7≤R5/F≤2.1 and 1.6≤R6/F≤1.9, wherein F is the system focal length value of the five-piece wide-angle lens, and R5 is the value of the third lens The radius of curvature of the object side, R6 is the radius of curvature of the image side of the third lens.

The five-piece wide-angle lens mentioned above further satisfies the conditional expressions of -0.8≤R7/F≤-0.6 and -0.3≤R8/F≤-0.2, where F is the system focal length value of the five-piece wide-angle lens, and R7 is the The radius of curvature of the object side of the fourth lens, R8 is the radius of curvature of the image side of the fourth lens.

The above-mentioned five-piece wide-angle lens further satisfies the conditional expressions of 1.4≤R9/F≤1.6 and 0.2≤R10/F≤0.3, wherein F is the system focal length value of the five-piece wide-angle lens, and R9 is the value of the fifth lens The radius of curvature of the object side, R10 is the radius of curvature of the image side of the fifth lens.

The above-mentioned five-piece wide-angle lens further satisfies the conditional expression of 1.2≤F/f1≤1.3, wherein F is the system focal length of the five-piece wide-angle lens, and f1 is the focal length of the first lens.

The above-mentioned five-piece wide-angle lens further satisfies the conditional expression of -0.7≤F/f2≤-0.6, wherein F is the system focal length of the five-piece wide-angle lens, and f2 is the focal length of the second lens.

The above-mentioned five-piece wide-angle lens further satisfies the conditional expression of -0.1≤F/f3≤0, wherein F is the system focal length of the five-piece wide-angle lens, and f3 is the focal length of the third lens.

The above-mentioned five-piece wide-angle lens further satisfies the conditional expression of 1.5≤F/f4≤1.6, wherein F is the system focal length of the five-piece wide-angle lens, and f4 is the focal length of the fourth lens.

The above-mentioned five-piece wide-angle lens further satisfies the conditional expression of -1.5≤F/f5≤-1.4, wherein F is the system focal length of the five-piece wide-angle lens, and f5 is the focal length of the fifth lens.

The above-mentioned five-piece wide-angle lens, wherein, the fourth lens has a surrounding area, the object side of the surrounding area is convex, and the image side is concave, and the optical axis area and the surrounding area are bounded by a line connecting an inflection point, The object side curvature radius of the optical axis area is R7, and the image side curvature radius is R8.

The above-mentioned five-piece wide-angle lens, wherein the fifth lens has a surrounding area, the object side of the surrounding area is concave, and the image side is convex, and the optical axis area and the surrounding area are bounded by a line connecting an inflection point, The radius of curvature of the object side of the optical axis region is R9, and the radius of curvature of the image side is R10.

With the above design, the five-piece wide-angle lens of the present invention can effectively reduce lens sensitivity, reduce the influence of spherical aberration, avoid excessive astigmatism, reduce stray light, and improve the stability of lens manufacturing, thereby improving the overall imaging quality. And both wide-angle characteristics.

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the utility model.

Description of drawings

Fig. 1 is the schematic diagram of the five-chip wide-angle lens of the first preferred embodiment of the utility model;

Fig. 1A is the schematic diagram of the first preferred embodiment sag of the utility model;

Fig. 1B is a distortion diagram of the first preferred embodiment of the utility model;

Figures 1C-1G are horizontal light fan diagrams of different image heights in the first preferred embodiment of the present invention;

Fig. 2 is the schematic diagram of the five-piece wide-angle lens of the second preferred embodiment of the utility model;

Fig. 2A is a distortion diagram of the second preferred embodiment of the present invention;

2B-2F are lateral light fan diagrams of different image heights in the second preferred embodiment of the present invention;

Fig. 3 is the schematic diagram of the five-piece wide-angle lens of the third preferred embodiment of the present invention;

Fig. 3A is a distortion diagram of the third preferred embodiment of the present invention;

3B-3F are lateral light fan diagrams of different image heights in the third preferred embodiment of the present invention.

Among them, reference signs

1 five-element wide-angle lens 50 fifth element

1’ five-element wide-angle lens 52 optical axis area

1” five-element wide-angle lens 54 surrounding area

10 The first lens 56 The line connecting the inflection point

20 Secondary lens 60 Flat lens

30 third lens element 70 photosensitive element

40 Fourth lens L optical axis

42 Optical axis area A Object side

44 Surrounding area B Image side

46 inflection point connection ST aperture

detailed description

Below in conjunction with accompanying drawing, structural principle and working principle of the present utility model are specifically described:

Fig. 1 is the five-piece wide-angle lens 1 provided by the first preferred embodiment of the present invention, which includes an aperture ST (aperture stop) and a first lens 10 in sequence along an optical axis L from the object side A to the image side B , a second eyeglass 20, a third eyeglass 30, a fourth eyeglass 40, and a fifth eyeglass 50, the five eyeglasses 10, 20, 30, 40, 50 are lens combinations with refractive power, and each of the eyeglasses 10 , 20, 30, 40, 50 respectively have an object side facing the object side A and an image side facing the image side B, and the five-piece wide-angle lens 1 is provided with CCD, CMOS or other photosensitive elements at the image side B. The element 70 can be provided with a flat lens 60 such as a filter and/or protective glass between the photosensitive element 70 and the fifth lens 50, and the number of the flat lens 60 can be increased or decreased or not provided according to requirements.

The "positive refractive power (or negative refractive power)" mentioned in this specification means that the refractive power of the lens on the optical axis calculated by Gaussian optics theory is positive (or negative). The area near the optical axis is the optical axis area, and the area around the optical axis area is the surrounding area. The optical axis area and the surrounding area are bounded by a line connecting an inflection point. The connecting line of the point of direction conversion is bent upwards. In addition, some lenses also include an extension part located on the periphery of the surrounding area for the lens to be assembled in a lens. The ideal imaging light does not pass through the extension part. In addition, the surface shape of the optical axis area can be judged according to common knowledge in this field, and the positive or negative of the R value (refers to the paraxial radius of curvature, usually refers to the R value on the lens data in the optical software) is used to judge the concave and convex . For the object side, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; for the image side, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a concave surface , it is judged to be convex.

In this embodiment, the aperture ST is located on the object side A of the first lens 10 .

The first lens 10 has positive refractive power, its object side and image side are both convex, the curvature radius R1 of the object side of the first lens 10 is 3.7, and the curvature radius R2 of the image side is -2.17; in other possible embodiments , R1 and R2 can have other changes, but R1 must be greater than 0 (R1>0), and R1 must be greater than R2 (R1>R2).

The second lens 20 has negative refractive power, its object side is convex, and its image side is concave. The curvature radius R3 of the object side of the second lens 20 is 10.75, and the curvature radius R4 of the image side is 2.34; in other possible embodiments , R3 and R4 can have other changes, but R3 must be greater than 0 (R3>0), and R3 must be greater than R4 (R3>R4).

The third lens 30 has negative refractive power, its object side is convex, and its image side is concave. The curvature radius R5 of the object side of the third lens 30 is 6.52, and the curvature radius R6 of the image side is 5.86; in other possible embodiments, R5 and R6 can have other changes, but R5 must be greater than 0 (R5>0), and R5 must be greater than R6 (R5>R6).

The fourth lens 40 has an optical axis area 42 located in the center of the fourth lens 40 and a peripheral area 44 located on the periphery of the optical axis area 42, the optical axis area 42 has positive refractive power, and its object side is concave, like The side is convex, the object side of the surrounding area 44 is convex, and the image side is concave. The radius of curvature R7 is -2.33, and the radius of curvature R8 of the image side is -0.85; in other possible embodiments, R7 and R8 can have other changes, but R7 must be less than 0 (R7<0), and R7 must be less than R8 (R7<R8).

The fifth lens 50 has an optical axis area 52 at the center of the fifth lens 50 and a peripheral area 54 at the periphery of the optical axis area 52. The optical axis area 52 has a negative refractive power, and its object side is a convex surface. The side is concave, the object side of the surrounding area 54 is concave, and the image side is convex, the optical axis area 52 and the surrounding area 54 are bounded by an inflection point line 56, and the object side of the optical axis area 42 The radius of curvature R9 is 4.56, and the radius of curvature R10 of the image side is 0.9; in other possible embodiments, R9 and R10 can have other changes, but R9 must be greater than 0, and R9 must be greater than R10 (R9>R10).

The design parameters of the five-chip wide-angle lens 1 provided by the first preferred embodiment are shown in Table 1 below:

Table I

Wherein, 0.033mm in the distance column refers to the distance between the aperture ST and the object side apex of the first lens 10, 0.765mm refers to the distance between the object side apex of the first lens 10 and the image side apex, and 0.025mm refers to the The distance between the vertex on the image side of the first lens 10 and the vertex on the object side of the second lens 20, and so on; the radius of curvature refers to the radius of curvature at the intersection of the optical axis L and the object side or image side, in the first preferred implementation In the example, the object side and image side of the first to fifth lenses 10, 20, 30, 40, 50 are all aspherical, and their surface shapes satisfy the following formula:

Where z is the depth of the aspheric surface (that is, the distance between the point on the aspheric surface that is h from the optical axis, and the tangent plane that is perpendicular to the optical axis and passes through the apex of the aspheric surface, the distance between the two), c=1/r, and r is the surface curvature radius , h is the distance between the point on the aspheric surface and the optical axis, k is the cone coefficient, A is the fourth-order coefficient, B is the sixth-order coefficient, C is the eighth-order coefficient, D is the tenth-order coefficient, E is The twelfth-order coefficient, F is the fourteenth-order coefficient, and G is the sixteenth-order coefficient. The parameters of each aspherical surface in the first preferred embodiment are shown in Table 2 below:

Table II

Based on the aforementioned design, the system focal length F of the five-piece large-aperture wide-angle lens 1 of this embodiment is 3.24 mm, the system length TTL (Total Track Length) is 4.755 mm, and the field of view (FOV, Field Of View) at the height of the maximum image is ) up to 87.2 degrees, the aperture value (f-number) up to 2.08. In this embodiment, the ratio (F/R1) of the system focal length value F to the curvature radius R1 of the object side of the first lens 10 is 0.88, and the five-element wide-angle lens 1 must satisfy the conditional expression of 0<F/R1<1.5 , the above conditional formula can make the object side of the first lens 10 smoother, avoid excessive turning of the light incident on the first lens 10, effectively reduce the sensitivity of the lens, and also reduce the influence of spherical aberration.

The ratio of the sag distance sagR7 of the object side of the fourth lens 40 radially outward from the optical axis L to the maximum range of the object side effective diameter of the fourth lens 40 and the radius of curvature R7 of the object side of the fourth lens 40 (sagR7 /R7) is 0.067, the definition of sag can be referred to as shown in Figure 1A, when the sag value on the object side of the fourth lens 40 decreases, the manufacturing stability of the fourth lens 40 can be improved; the gap between the lenses on the optical axis L The total Gaa is 0.54484, and its ratio (Gaa/T7) to the thickness T7 of the fourth lens 40 on the optical axis L is 0.82. This result can make the third lens 30 and the fourth lens 40 close to reduce The sag value on the object side of the fourth lens 40 improves the manufacturing stability of the fourth lens 40; the ratio of the total Gaa of the gaps between the lenses on the optical axis L to the thickness T3 of the second lens 20 on the optical axis L (Gaa/T3) is 2.12, and this result can avoid that astigmatism is too large; The gap sum Gaa between each lens on this optical axis L and the ratio of the thickness T5 of this third lens 30 on this optical axis L (Gaa/ T5) is 1.62, and this result can make the angle of marginal light incident on the third lens 30 smaller, reducing the occurrence of stray light between the second lens 20 and the third lens 30; the result of R3*R4 is 25.16, which can Suppress the light angle to prevent the second lens 20 from being too large at the image side and reduce the occurrence of stray light; the result of R7*R8 is 1.98, which can correct astigmatism and improve the overall imaging quality; in addition, the system length TTL and system focal length The ratio of the value F (TTL/F) is 1.47; the ratio (ATL/Gaa) of the total thickness ATL of the lenses on the optical axis L to the total gap Gaa between the lenses on the optical axis L is 5.07; each lens The ratio of the curvature radii R1-R10 of the system to the system focal length F is shown in Table 3 below; The ratios of f1, f2, f3, f4, and f5 are shown in Table 4 below; the distortion diagram of the five-piece wide-angle lens 1 is shown in Figure 1B, and the lateral light fan diagram is shown in Figures 1C-1G.

In this way, the five-piece wide-angle lens 1 can effectively reduce lens sensitivity, reduce the influence of spherical aberration, avoid excessive astigmatism, reduce stray light, and improve the stability of lens manufacturing, thereby improving the overall imaging quality and having both wide-angle characteristics.

Table three

R1/F R2/F R3/F R4/F R5/F R6/F R7/F R8/F R9/F R10/F 1.14 -0.67 3.32 0.72 2.01 1.81 -0.72 -0.26 1.41 0.28

Table four

F/f1 F/f2 F/f3 F/f4 F/f5 1.23 -0.69 -0.03 1.54 -1.47

Fig. 2 is the five-piece wide-angle lens 1' provided by the second preferred embodiment of the present utility model, and its eyeglass configuration is similar to that of the first preferred embodiment, and the design parameters of the five-piece wide-angle lens 1' are shown in Table 5 below:

Table five

In the second preferred embodiment, the object side and image side of the first to fifth lenses 10, 20, 30, 40, 50 are all aspherical, and their surface shapes satisfy the following formula, and the definitions of various parameters are as before Said:

The parameters of each aspherical surface of the second preferred embodiment are shown in Table 6 below:

Table six

Based on the aforementioned design, the focal length F of the system in this embodiment is 3.27 mm, the system length TTL is 4.761 mm, the field of view at the maximum image height reaches 86.4 degrees, and the f-number reaches 2.09.

Among them, F/R1 is 0.87, sagR7/R7 is 0.063, Gaa is 0.5922, so Gaa/T7 is 0.87, Gaa/T3 is 2.35, Gaa/T5 is 1.88, R3*R4 is 14.78, R7*R8 is 2.02, TTL/ F is 1.46, ATL/Gaa is 4.6, the ratio of the curvature radii R1-R10 of each lens to the system focal length value F is shown in Table 7 below, the system focal length value F of the five-piece wide-angle lens 1' is related to the first to the second The ratios of the focal lengths f1, f2, f3, f4, and f5 of the five lenses 10, 20, 30, 40, and 50 are shown in Table 8 below. The distortion diagram of the five-element wide-angle lens 1' is shown in Figure 2A. The horizontal light fan Figures are shown in Figures 2B-2F.

Table seven

R1/F R2/F R3/F R4/F R5/F R6/F R7/F R8/F R9/F R10/F 1.14 -0.67 2.15 0.64 1.77 1.64 -0.72 -0.26 1.46 0.28

table eight

F/f1 F/f2 F/f3 F/f4 F/f5 1.23 -0.69 -0.02 1.54 -1.49

Fig. 3 is the five-piece wide-angle lens 1 provided by the third preferred embodiment of the present invention, and its lens configuration is similar to that of the first preferred embodiment. The design parameters of the five-piece wide-angle lens 1 "are as shown in Table 9 below:

Table nine

In the third preferred embodiment, the object side and image side of the first to fifth lenses 10, 20, 30, 40, 50 are all aspherical, and their surface shapes satisfy the following formula:

The parameters of each aspheric surface of the third preferred embodiment are shown in Table 10 below:

table ten

Based on the aforementioned design, the focal length F of the system in this embodiment is 3.29 mm, the system length TTL is 4.805 mm, the field of view at the maximum image height reaches 86.3 degrees, and the f-number reaches 2.085.

Among them, F/R1 is 0.9, sagR7/R7 is 0.065, Gaa is 0.60021, so Gaa/T7 is 0.866, Gaa/T3 is 2.47, Gaa/T5 is 2, R3*R4 is 15.83, R7*R8 is 1.98, TTL/ F is 1.46, and ATL/Gaa is 4.58. The ratio of the curvature radii R1~R10 of each lens to the system focal length F is shown in Table 11 below. The ratios of the focal lengths f1, f2, f3, f4, and f5 of the fifth lens 10, 20, 30, 40, 50 are shown in Table 12 below. The distortion diagram of the five-element wide-angle lens 1" is shown in Figure 3A, horizontal Light fan diagrams are shown in Figures 3B-3F.

Table Eleven

R1/F R2/F R3/F R4/F R5/F R6/F R7/F R8/F R9/F R10/F 1.11 -0.67 2.23 0.66 1.84 1.64 -0.70 -0.26 1.51 0.28

Table 12

F/f1 F/f2 F/f3 F/f4 F/f5 1.25 -0.68 -0.03 1.52 -1.48

The foregoing three embodiments are only examples of the utility model. Based on the spirit of the utility model, the parameters of the five-piece wide-angle lens 1, 1', 1" can be changed, for example, the radius of curvature R1-R10 of each lens The ratio to the focal length value F of the system as long as it falls within the following range: 1.1≤R1/f≤1.2, -0.7≤R2/F≤-0.6, 2.1≤R3/F≤3.4, 0.6≤R4/F ≤0.8, 1.7≤R5/F≤2.1, 1.6≤R6/F≤1.9, -0.8≤R7/F≤-0.6, -0.3≤R8/F≤-0.2, 1.4≤R9/F≤1.6, 0.2≤R10 /F≤0.3; the ratio of the focal length value F of the system to the focal lengths f1, f2, f3, f4, f5 of the first to fifth lenses 10, 20, 30, 40, 50 should be within the following range : 1.2≤F/f1≤1.3, -0.7≤F/f2≤-0.6, -0.1≤F/f3≤0, 1.5≤F/f4≤1.6, -1.5≤F/f5≤-1.4.

In addition, the ratio of the focal length F of the system to the radius of curvature R1 of the object side surface of the first lens 10 can have other changes, and it is better to satisfy the conditional formula of 0<F/R1<1.5, which can make the object of the first lens 10 The side is relatively smooth, avoiding excessive turning of the light incident on the first lens 10, effectively reducing the sensitivity of the lens, and also reducing the influence of spherical aberration; the sum of the gaps between the lenses on the optical axis L Gaa and the fourth lens The ratio of the thickness T7 of 40 on the optical axis L can have other changes, and it is better to satisfy the conditional formula of Gaa/T7<1, which can make the third lens 30 and the fourth lens 40 close to reduce the fourth lens 30. The sag value on the object side of the lens 40 improves the manufacturing stability of the fourth lens 40; the ratio of the total Gaa of the gaps between the lenses on the optical axis L to the thickness T3 of the second lens 20 on the optical axis L can be other It is better to satisfy the conditional formula of Gaa/T3<2.5, which can avoid excessive astigmatism; the gap between the lenses on the optical axis L adds up Gaa and the thickness of the third lens 30 on the optical axis L The ratio of T5 can have other changes, it is better to satisfy the conditional formula of Gaa/T5<2.1, which can make the angle of marginal light incident on the third lens 30 smaller, reduce the second lens 20 and the third lens 30 generation of stray light; the sag distance sagR7 of the object side of the fourth lens 40 radially outward from the optical axis L to the maximum range of the object side effective diameter of the fourth lens 40 and the radius of curvature of the object side of the fourth lens 40 The ratio of R7 can have other changes, it is better to satisfy the conditional formula of sagR7/R7<0.3, the sag value on the object side of the fourth lens 40 is reduced, which can improve the manufacturing stability of the fourth lens 40; the object side of the second lens 20 The radius of curvature R3 and the radius of curvature R4 on the image side satisfy the conditional formula of 13<R3*R4<27, which can suppress the light angle, prevent the second lens 20 from being too large at the image side light angle, and reduce the occurrence of stray light The radius of curvature R7 on the object side of the optical axis region 42 of the fourth lens 40 and the radius of curvature R8 on the image side satisfy the conditional formula of 1<R7*R8<2.1, which can correct astigmatism and improve the overall imaging quality; system length The ratio of TTL to the system focal length value F can have other changes, and it is better to satisfy the conditional formula of 1.4≤TTL/F≤1.5; The ratio of gap to total Gaa can have other changes, preferably satisfying the conditional expression of 4.5≤ATL/Gaa≤5.1.

Of course, the utility model can also have other various embodiments, and those skilled in the art can make various corresponding changes and deformations according to the utility model without departing from the spirit and essence of the utility model, but These corresponding changes and deformations should all belong to the protection scope of the appended claims of the present utility model.

Claims (20)

1. a kind of five chips wide-angle lens, it is characterised in that sequentially included along an optical axis by thing side to image side：

One aperture；

One first eyeglass, with positive refractive power, its thing side is convex surface and image side surface is convex surface；

One second eyeglass, with negative refractive power, its thing side is convex surface and image side surface is concave surface；

One the 3rd eyeglass, with negative refractive power, its thing side is convex surface and image side surface is concave surface；

One the 4th eyeglass, with positive refractive power, its thing side is concave surface and image side surface is convex surface；And

One the 5th eyeglass, with negative refractive power, its thing side is convex surface and image side surface is concave surface；

The five chips wide-angle lens meets 0<F/R1<1.5 conditional, wherein F are the system focal length of the five chips wide-angle lens Value, R1 is the radius of curvature of the thing side of first eyeglass.

2. a kind of five chips wide-angle lens, it is characterised in that sequentially included along an optical axis by thing side to image side：

One aperture；

One first eyeglass, with positive refractive power, its thing flank radius is R1, and image side curvature radius is R2, wherein R1>0 And R1>R2；

One second eyeglass, with negative refractive power, its thing flank radius is R3, and image side curvature radius is R4, wherein R3> R4；

One the 3rd eyeglass, with negative refractive power, its thing flank radius is R5, and image side curvature radius is R6, wherein R5>0 And R5>R6；

One the 4th eyeglass, with positive refractive power, its thing flank radius is R7, and image side curvature radius is R8, wherein R7<0 And R7<R8；And

One the 5th eyeglass, with negative refractive power, its thing flank radius is R9, and image side curvature radius is R10, wherein R9>0 And R9>R10；

The five chips wide-angle lens meets 0<F/R1<1.5 conditional, wherein F are the system focal length of the five chips wide-angle lens Value, R1 is the radius of curvature of the thing side of first eyeglass.

3. five chips wide-angle lens according to claim 1 or 2, it is characterised in that more meet Gaa/T7<1 conditional, Wherein Gaa is that the gap on the optical axis between each eyeglass is added up, and T7 is the 4th eyeglass in the thickness on the optical axis.

4. five chips wide-angle lens according to claim 1 or 2, it is characterised in that more meet Gaa/T3<2.5 condition Formula, wherein Gaa are that the gap on the optical axis between each eyeglass is added up, and T3 is second eyeglass in the thickness on the optical axis.

5. five chips wide-angle lens according to claim 1 or 2, it is characterised in that more meet Gaa/T5<2.1 condition Formula, wherein Gaa are that the gap on the optical axis between each eyeglass is added up, and T5 is the 3rd eyeglass in the thickness on the optical axis.

6. five chips wide-angle lens according to claim 1 or 2, it is characterised in that more meet sagR7/R7<0.3 bar Part formula, wherein sagR7 are the 4th eyeglass thing sideways by the optical axis radially to the maximum model of the 4th eyeglass thing side effective diameter The sag distance enclosed, R7 is the radius of curvature of the thing side of the 4th eyeglass.

7. five chips wide-angle lens according to claim 1 or 2, it is characterised in that more meet 13<R3*R4<27 condition Formula, wherein R3 are the radius of curvature of the thing side of second eyeglass, and R4 is the radius of curvature of the image side surface of second eyeglass.

8. five chips wide-angle lens according to claim 1 or 2, it is characterised in that more meet 1<R7*R8<2.1 condition Formula, wherein R7 are the radius of curvature of the thing side of the 4th eyeglass, and R8 is the radius of curvature of the image side surface of the 4th eyeglass.

9. five chips wide-angle lens according to claim 1 or 2, it is characterised in that more meet 1.1≤R1/F≤1.2 with And the conditional of -0.7≤R2/F≤- 0.6, wherein F is the system focal length value of the five chips wide-angle lens, and R1 is first eyeglass Thing side radius of curvature, R2 for first eyeglass image side surface radius of curvature.

10. five chips wide-angle lens according to claim 1 or 2, it is characterised in that more meet 2.1≤R3/F≤3.4 with And the conditional of 0.6≤R4/F≤0.8, wherein F is the system focal length value of the five chips wide-angle lens, and R3 is second eyeglass The radius of curvature of thing side, R4 is the radius of curvature of the image side surface of second eyeglass.

11. five chips wide-angle lens according to claim 1 or 2, it is characterised in that more meet 1.7≤R5/F≤2.1 with And the conditional of 1.6≤R6/F≤1.9, wherein F is the system focal length value of the five chips wide-angle lens, and R5 is the 3rd eyeglass The radius of curvature of thing side, R6 is the radius of curvature of the image side surface of the 3rd eyeglass.

12. five chips wide-angle lens according to claim 1 or 2, it is characterised in that more meet -0.8≤R7/F≤- 0.6 And the conditional of -0.3≤R8/F≤- 0.2, wherein F is the system focal length value of the five chips wide-angle lens, and R7 is the 4th mirror The radius of curvature of the thing side of piece, R8 is the radius of curvature of the image side surface of the 4th eyeglass.

13. five chips wide-angle lens according to claim 1 or 2, it is characterised in that more meet 1.4≤R9/F≤1.6 with And the conditional of 0.2≤R10/F≤0.3, wherein F is the system focal length value of the five chips wide-angle lens, and R9 is the 5th eyeglass Thing side radius of curvature, R10 for the 5th eyeglass image side surface radius of curvature.

14. five chips wide-angle lens according to claim 1 or 2, it is characterised in that more meet 1.2≤F/f1≤1.3 Conditional, wherein F are the system focal length value of the five chips wide-angle lens, and f1 is the focal length of first eyeglass.

15. five chips wide-angle lens according to claim 1 or 2, it is characterised in that more meet -0.7≤F/f2≤- 0.6 Conditional, wherein F be the five chips wide-angle lens system focal length value, f2 be second eyeglass focal length.

16. five chips wide-angle lens according to claim 1 or 2, it is characterised in that more meet -0.1≤F/f3≤0 Conditional, wherein F are the system focal length value of the five chips wide-angle lens, and f3 is the focal length of the 3rd eyeglass.

17. five chips wide-angle lens according to claim 1 or 2, it is characterised in that more meet 1.5≤F/f4≤1.6 Conditional, wherein F are the system focal length value of the five chips wide-angle lens, and f4 is the focal length of the 4th eyeglass.

18. five chips wide-angle lens according to claim 1 or 2, it is characterised in that more meet -1.5≤F/f5≤- 1.4 Conditional, wherein F be the five chips wide-angle lens system focal length value, f5 be the 5th eyeglass focal length.

19. five chips wide-angle lens according to claim 1 or 2, it is characterised in that the 4th eyeglass has a peripheral region Domain, the thing side of the peripheral region is that convex surface, image side surface are concave surface, and the optical axis region is with the peripheral region with a point of inflexion line For boundary, the thing flank radius in the optical axis region is R7, and image side curvature radius is R8.

20. five chips wide-angle lens according to claim 1 or 2, it is characterised in that the 5th eyeglass has a peripheral region Domain, the thing side of the peripheral region is that concave surface, image side surface are convex surface, and the optical axis region is with the peripheral region with a point of inflexion line For boundary, the thing flank radius in the optical axis region is R9, and image side curvature radius is R10.