TWM543371U - Six-piece miniaturized wide-angle lens - Google Patents

Description

Six-piece miniaturized wide-angle lens

This creation relates to an optical system, and more particularly to a six-piece imaging lens having a wide-angle characteristic.

A wide-angle lens is a lens with a short focal length and a large viewing angle. It is characterized by a long depth of field, a wide range of scenes, and a sense of space.

The TW 201527790 patent discloses a six-piece optical imaging lens having a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. Although the size can be reduced to about 5 mm, the maximum viewing angle is only 110 ° or less, that is, the wide-angle characteristics are not particularly convex.

Therefore, how to provide a wide-angle lens with a viewing angle of up to or greater than 150°, and to meet the trend of market miniaturization and light weight, is considered by those in the field.

The main purpose of this creation is to provide a six-piece imaging lens that combines wide-angle and miniaturization characteristics.

In order to achieve the above and other objects, the present invention provides a six-piece miniaturized wide-angle lens that sequentially includes a first lens, a second lens, a third lens, an aperture, and a fourth lens from the object side to the image side. a fifth lens and a sixth lens. The first lens has a negative refractive power, and the side surface of the object is a convex surface, which can reduce the turning angle of the edge light incident system, avoiding that the edge light cannot enter the system due to the excessive turning angle; the second lens has a negative refractive power, and the object side is convex. Sharing the distortion aberration of the large viewing angle with the first lens, and making the light lightly incident on the third lens; the third lens has a positive refractive power, and the object side and the image side are convex surfaces, and the positive refractive power of the third lens The combined negative refractive power of a lens and a second lens balances the front group system; the fourth lens has a positive refractive power, and the object side and the image side are convex; the fifth lens has a negative refractive power, and the image side is concave. The fourth lens and the fifth lens are matched to correct the system color difference and aberration; the object side of the sixth lens is convex and the image side is concave; the six-piece miniaturized wide-angle lens satisfies the following relationship: 3.8<R1/R2< 5.5, wherein R1 is the radius of curvature of the side of the first lens object, and R2 is the radius of curvature of the side of the first lens image, thereby contributing to the improvement of the viewing angle of the system, and Spherical aberration arising CP perspective, a large viewing angle and thus contribute to downsizing purposes.

In order to achieve the above and other objects, the present invention also provides a six-piece miniaturized wide-angle lens, which includes a first lens, a second lens, a third lens, an aperture, and a fourth from the object side to the image side. a lens, a fifth lens and a sixth lens. The first lens has a negative refractive power, the radius of curvature of the side of the object is a positive value, and the radius of curvature of the side of the object is larger than the radius of curvature of the side of the image; the second lens has a negative refractive power, and the radius of curvature of the side of the object is positive, and The radius of curvature of the side of the object is larger than the radius of curvature of the side of the image; the third lens has a positive refractive power, the radius of curvature of the side of the object is positive, and the radius of curvature of the side of the object is larger than the radius of curvature of the side of the image; the fourth lens has Positive refractive power, the radius of curvature of the side of the object is positive, and the radius of curvature of the side of the object is larger than the radius of curvature of the side of the image; the fifth lens has a negative refractive power, and the radius of curvature of the image side is positive; the sixth lens The radius of curvature of the side is positive, and the radius of curvature of the side of the object is larger than the radius of curvature of the side of the image; the six-piece miniaturized wide-angle lens more satisfies the following relationship: 3.8<R1/R2<5.5, where R1 is the first lens The radius of curvature of the side of the object, R2 is the radius of curvature of the side of the first lens image, thereby contributing to the improvement of the viewing angle of the system and correcting the spherical aberration caused by the large viewing angle Thus helping to achieve a large viewing angle and miniaturization purposes.

The aforementioned six-piece miniaturized wide-angle lens can satisfy the following relationship: Nd6>1.6; wherein Nd6 is the refractive index of the sixth lens, thereby reducing the off-axis incident light angle and improving the imaging quality.

The above-mentioned six-piece miniaturized wide-angle lens can satisfy the following relationship: R9/R8>3.5; wherein R8 is the radius of curvature of the side of the fourth lens image, and R9 is the radius of curvature of the side surface of the fifth lens, whereby the fourth lens The side of the image and the side of the fifth lens can be well matched, which contributes to the effect of correcting chromatic aberration and aberration.

The aforementioned six-piece miniaturized wide-angle lens can satisfy the following relationship: 0<ff/fr<2; wherein ff is a composite focal length value of the first to third lenses, and fr is a composite focal length value of the fourth to sixth lenses. Therefore, the focal length values of the front and rear mirror groups are relatively balanced, which helps to correct system aberrations.

The aforementioned six-piece miniaturized wide-angle lens can satisfy the following relationship: 1<f3/f4+f12/f56<4; wherein f3 is the focal length value of the third lens, f4 is the focal length value of the fourth lens, and f12 is the The composite focal length value of the first and second lenses, f56 is the composite focal length value of the fifth and sixth lenses, whereby the focal length between the lenses can be well matched and the configuration is balanced, thereby helping to correct the off-axis Aberration.

In the above-described six-piece miniaturized wide-angle lens, the sixth lens has a negative refractive power, and at least one of the object side and the image side of the sixth lens has an inflection point located at an off-axis (away from the optical axis), thereby To correct off-axis aberrations.

In the above-mentioned six-piece miniaturized wide-angle lens, the first to sixth lenses may be plastic lenses and both surfaces are aspherical, thereby contributing to cost reduction, aberration correction, and weight reduction.

In the aforementioned six-piece miniaturized wide-angle lens, there are only six lenses with refractive power.

The aforementioned six-piece miniaturized wide-angle lens can satisfy the following relationship: 5.5<R1/F<8; 1.2<R2/F<1.7; -0.35<F/f1<-0.25; 0.32<R3/F<0.45; 0.2< R4/F<0.3; -0.55<F/f2<-0.4; 0.7<R5/F<1.2; -1<R6/F<-0.8; 1<F/f3<1.3; 0.8<R7/F<1.1; -1.2<R8/F<-0.7;1<F/f4<1.3;-23<R9/F<-5;0.7<R10/F<1.2;-1<F/f5<-0.6;0.65<R11/ F<1.5; 0.45<R12/F<1.5; -0.25<F/f6<-0.08;1.85<TTL/F<2.05; 0.85<ATL/F<1.2; 0.65<Gaa/F<0.4; where R1 is a radius of curvature of a side surface of the first lens object, R2 is a radius of curvature of a side surface of the first lens image, R3 is a radius of curvature of a side surface of the second lens object, R4 is a radius of curvature of a side surface of the second lens image, and R5 is the third radius The radius of curvature of the side surface of the lens object, R6 is the radius of curvature of the side surface of the third lens image, R7 is the radius of curvature of the side surface of the fourth lens object, R8 is the radius of curvature of the side surface of the fourth lens image, and R9 is the fifth lens object. The radius of curvature of the side surface, R10 is the radius of curvature of the side of the fifth lens image, and R11 is the curve of the side of the sixth lens object Radius, R12 is the radius of curvature of the side of the sixth lens image, f1 is the focal length value of the first lens, f2 is the focal length value of the second lens, f3 is the focal length value of the third lens, and f4 is the fourth lens The focal length value, f5 is the focal length value of the fifth lens, f6 is the focal length value of the sixth lens, TTL is the system length of the six-piece miniaturized wide-angle lens, and ATL is the first to sixth lenses on an optical axis The sum of the thicknesses of the upper lenses, Gaa is the sum of the lens pitches of the first to sixth lenses on an optical axis, and F is the system focal length value of the six-piece miniaturized wide-angle lens. Thereby, the six-piece miniaturized wide-angle lens has wide-angle, corrected aberration, good image quality, and miniaturization effect.

Please refer to FIG. 1 , which is a first embodiment of the present invention. The six-piece miniaturized wide-angle lens (hereinafter referred to as a six-piece lens) is sequentially included on the optical axis L from the object side A to the image side B. A first lens 10, a second lens 20, a third lens 30, a diaphragm ST, a fourth lens 40, a fifth lens 50 and a sixth lens 60 are provided with CCD and CMOS on the image side B. Or other photosensitive elements (not shown), a flat lens 70 such as a filter and/or a cover glass may be disposed between the photosensitive element and the sixth lens 60, and the number of the flat lenses 70 may be increased or decreased or not set as needed. Wherein, the first, second, and third lenses 10, 20, and 30 that are closer to the object side A than the aperture ST are the front mirror group; and the apertures ST are closer to the fourth, fifth, and sixth sides of the image side B. The lenses 40, 50, and 60 are rear mirror groups. In this paper, the composite focal length of the front mirror group is ff, and the composite focal length of the rear mirror group is called fr.

In this embodiment, the first lens 10 has a negative refractive power, the object side surface is a convex surface and the image side surface is a concave surface, and the curvature radius of the object side surface and the image side surface are positive values, and the curvature radius of the object side surface is larger than the curvature radius of the image side surface. The object side surface and the image side surface of the first lens 10 made of plastic may be aspherical. In this paper, when the surface center of a curved surface is closer to the image side than the surface itself, the curvature radius of the surface is positive; otherwise, when the surface center of a curved surface is closer to the object side than the surface itself, the surface is The radius of curvature is negative. Herein, unless otherwise stated, the concave and convex shapes of the "object side" and the "image side" refer to the surface shape of the surface at the optical axis L.

The second lens 20 has a negative refractive power, the object side surface is a convex surface and the image side surface is a concave surface, and the curvature radius of the object side surface and the image side surface are all positive values, and the curvature radius of the object side surface is larger than the curvature radius of the image side surface, and is made of plastic. Both the object side surface and the image side surface of the second lens 20 may be aspherical.

The third lens 30 has a positive refractive power, and the object side surface and the image side surface are convex surfaces, and the curvature radius of the object side surface is positive and larger than the curvature radius of the image side surface thereof, and the curvature radius of the image side surface is a negative value, and the plastic surface is made of plastic. Both the object side and the image side of the third lens 30 may be aspherical.

The fourth lens 40 has a positive refractive power, and the object side surface and the image side surface are both convex surfaces, and the curvature radius of the object side surface is positive and larger than the curvature radius of the image side surface thereof, and the curvature radius of the image side surface is negative, made of plastic. The object side surface and the image side surface of the fourth lens 40 may be aspherical.

The fifth lens 50 has a negative refractive power, and the object side surface and the image side surface are both concave surfaces, and the curvature radius of the object side surface is a negative value, and the curvature radius of the image side surface is a positive value, that is, the curvature radius of the object side surface is smaller than the curvature radius of the image side surface. The object side surface and the image side surface of the fifth lens 50 made of plastic may be aspherical.

The sixth lens 60 has a negative refractive power, the object side surface is a convex surface and the image side surface is a concave surface, and the curvature radius of the object side surface and the image side surface are both positive values, and the curvature radius of the object side surface is larger than the curvature radius of the image side surface thereof, and The object side surface and the image side surface of the sixth lens 60 each have an inflection point located off-axis, and the off-axis point refers to the object side surface and image of the sixth lens 60 made of plastic not on the optical axis L. The sides can be aspherical.

The first to sixth lenses are all designed with a plastic lens, so that the six-piece lens of the embodiment can achieve the purpose of reducing cost and weight.

The design parameters of the six-piece lens of this embodiment are as shown in Table 1 below:

Table I         <TABLE border="1" borderColor="#000000" width="_0001"><TBODY><tr><td> Lens</td><td> Face </td><td> Curvature Radius (mm) < /td><td> Distance (mm) </td><td> Refractive Index (Nd) </td><td> Dispersion Coefficient (Vd) </td><td> Focal Length (mm) </td>< /tr><tr><td> First Lens</td><td> Side 1 </td><td> 17.26 </td><td> 0.25 </td><td> 1.54 </td> <td> 55.99 </td><td> -8.33 </td></tr><tr><td> Image side 2 </td><td> 3.58 </td><td> 0.03 </td> </tr><tr><td> second lens</td><td> object side 3 </td><td> 0.93 </td><td> 0.35 </td><td> 1.66 </td ><td> 20.37 </td><td> -5.38 </td></tr><tr><td> Image side 4 </td><td> 0.63 </td><td> 0.36 </td ></tr><tr><td> Third lens</td><td> Side 5 </td><td> 2.33 </td><td> 0.73 </td><td> 1.54 </ Td><td> 55.99 </td><td> 2.19 </td></tr><tr><td> Image side 6 </td><td> -2.20 </td><td> -0.01 < /td></tr><tr><td> Aperture</td><td> </td><td> ∞ </td><td> 0.23 </td><td> </td><td > </td><td> </td></tr><tr><td> Fourth lens</td><td> Side 7 </td><td> 2.20 </td><td> 0.58 </td><td> 1.54 </td><td > 55.99 </td><td> 2.28 </td></tr><tr><td> Image 8 </td><td> -2.59 </td><td> 0.05 </td></ Tr><tr><td> fifth lens</td><td> object side 9 </td><td> -54 </td><td> 0.23 </td><td> 1.64 </td> <td> 23.53 </td><td> -3.76 </td></tr><tr><td> Image side 10 </td><td> 2.54 </td><td> 0.57 </td> </tr><tr><td> sixth lens</td><td> object side 11 </td><td> 1.91 </td><td> 0.39 </td><td> 1.64 </td ><td> 23.53 </td><td> -18.75 </td></tr><tr><td> Image side 12 </td><td> 1.52 </td><td> 0.44 </td ></tr><tr><td> Filter/protective glass</td><td> Object side 13 </td><td> ∞ </td><td> 0.21 </td><td> </td><td> </td><td> </td></tr><tr><td> image side 14 </td><td> ∞ </td><td> 0.39 </td ></tr></TBODY></TABLE>

Based on the foregoing design, the focal length value F of the present embodiment is 2.48 mm, the system length is 4.81 mm, and the maximum viewing angle is 150 ∘.

At this time, the values of the relationship of the six-piece lens are as shown in Table 2 below:

Table II         <TABLE border="1" borderColor="#000000" width="_0002"><TBODY><tr><td> Relationship </td><td> Value </td><td> Relationship </td ><td> Value</td></tr><tr><td> N6 </td><td> 1.64 </td><td> R7/F </td><td> 0.89 </td> </tr><tr><td> R9/R8 </td><td> 20.85 </td><td> R8/F </td><td> -1.04 </td></tr><tr ><td> ff/fr </td><td> 1.28 </td><td> R9/F </td><td> -21.77 </td></tr><tr><td> f3/ F4+f12/f56 </td><td> 2.03 </td><td> R10/F </td><td> 1.02 </td></tr><tr><td> TTL/f </ Td><td> 1.94 </td><td> R11/F </td><td> 0.77 </td></tr><tr><td> ATL/f </td><td> 1.02 < /td><td> R12/F </td><td> 0.61 </td></tr><tr><td> Gaa/f </td><td> 0.50 </td><td> F /f1 </td><td> -0.30 </td></tr><tr><td> R1/F </td><td> 6.96 </td><td> F/F2 </td> <td> -0.46 </td></tr><tr><td> R2/F </td><td> 1.44 </td><td> F/f3 </td><td> 1.13 </ Td></tr><tr><td> R3/F </td><td> 0.37 </td><td> F/f4 </td><td> 1.09 </td></tr>< Tr><td> R4/F </td><td> 0.25 </td><td> F/f5 </td><td> -0.66 </td></tr><tr><td> R5 /F </td><td> 0.94 </td><td> F/f6 </td><td> -0.13 </td></tr><tr>< Td> R6/F </td><td> -0.89 </td><td> R1/R2 </td><td> 4.82 </td></tr></TBODY></TABLE>

In this way, the embodiment can achieve the purpose of large viewing angle, miniaturization, weight reduction, and cost reduction, and can reduce the angle of off-axis incident light, improve imaging quality, system chromatic aberration and aberration (including off-axis aberration). It is corrected that the transverse light fan pattern of different viewing angles is as shown in FIGS. 1A to 1E. It can be seen that the performance of the corrected chromatic aberration of this embodiment is very excellent, and the field curvature performance is as shown in FIG. 1F, and the maximum field curvature is not more than ±0.04 mm. The distortion ratio is as shown in Fig. 1G, the maximum distortion is less than ±80%, and the color difference performance is as shown in the 1H, and the maximum lateral chromatic aberration is less than ±2 μm. It is obvious that the embodiment has a good imaging effect.

Please refer to FIG. 2 , which is a second embodiment of the present invention. The lens configuration is similar to that of the first embodiment. The design parameters of the six-piece lens of this embodiment are as shown in Table 3 below:

Table 3         <TABLE border="1" borderColor="#000000" width="_0003"><TBODY><tr><td> Lens</td><td> Face</td><td> Curvature Radius (mm) < /td><td> Distance (mm) </td><td> Refractive Index (Nd) </td><td> Dispersion Coefficient (Vd) </td><td> Focal Length (mm) </td>< /tr><tr><td> First lens</td><td> Side 1 </td><td> 19.68 </td><td> 0.24 </td><td> 1.54 </td> <td> 55.99 </td><td> -8.51 </td></tr><tr><td> Image side 2 </td><td> 3.74 </td><td> 0.11 </td> </tr><tr><td> second lens</td><td> object side 3 </td><td> 1.04 </td><td> 0.34 </td><td> 1.66 </td ><td> 20.37 </td><td> -5.06 </td></tr><tr><td> Image side 4 </td><td> 0.69 </td><td> 0.43 </td ></tr><tr><td> Third lens</td><td> Side 5 </td><td> 1.99 </td><td> 0.58 </td><td> 1.54 </ Td><td> 55.99 </td><td> 2.06 </td></tr><tr><td> Image side 6 </td><td> -2.31 </td><td> 0.07 </ Td></tr><tr><td> aperture</td><td> </td><td> ∞ </td><td> 0.20 </td><td> </td><td> </td><td> </td></tr><tr><td> fourth lens</td><td> object side 7 </td><td> 2.55 </td><td> 0.56 </td><td> 1.54 </td><td> 55.99 </td><td> 2.15 </td></tr><tr><td> Image side 8 </td><td> -2.01 </td><td> 0.06 </td></tr ><tr><td> Fifth lens</td><td> Side 9 </td><td> -18.73 </td><td> 0.26 </td><td> 1.64 </td>< Td> 23.53 </td><td> -2.87 </td></tr><tr><td> Image side 10 </td><td> 2.07 </td><td> 0.57 </td>< /tr><tr><td> Sixth lens</td><td> Side 11 </td><td> 3.52 </td><td> 0.47 </td><td> 1.64 </td> <td> 23.53 </td><td> -13.10 </td></tr><tr><td> Image side 12 </td><td> 2.35 </td><td> 0.42 </td> </tr><tr><td> Filter/protective glass</td><td> Object side 13 </td><td> ∞ </td><td> 0.21 </td><td> < /td><td> </td><td> </td></tr><tr><td> Image side 14 </td><td> ∞ </td><td> 0.39 </td> </tr></TBODY></TABLE>

Based on the foregoing design, the focal length value F of the present embodiment is 2.57 mm, the system length is 4.90 mm, and the maximum viewing angle is 150 ∘.

At this time, the values of the relationship of the six-piece lens are as shown in Table 4 below:

Table 4         <TABLE border="1" borderColor="#000000" width="_0004"><TBODY><tr><td> Relationship </td><td> Value </td><td> Relationship </td ><td> Value</td></tr><tr><td> N6 </td><td> 1.64 </td><td> R7/F </td><td> 0.99 </td> </tr><tr><td> R9/R8 </td><td> 9.31 </td><td> R8/F </td><td> -0.78 </td></tr><tr ><td> ff/fr </td><td> 0.67 </td><td> R9/F </td><td> -7.29 </td></tr><tr><td> f3/ F4+f12/f56 </td><td> 2.33 </td><td> R10/F </td><td> 0.80 </td></tr><tr><td> TTL/f </ Td><td> 1.91 </td><td> R11/F </td><td> 1.37 </td></tr><tr><td> ATL/f </td><td> 0.95 < /td><td> R12/F </td><td> 0.92 </td></tr><tr><td> Gaa/f </td><td> 0.56 </td><td> F /f1 </td><td> -0.30 </td></tr><tr><td> R1/F </td><td> 7.66 </td><td> F/F2 </td> <td> -0.51 </td></tr><tr><td> R2/F </td><td> 1.46 </td><td> F/f3 </td><td> 1.25 </ Td></tr><tr><td> R3/F </td><td> 0.41 </td><td> F/f4 </td><td> 1.19 </td></tr>< Tr><td> R4/F </td><td> 0.27 </td><td> F/f5 </td><td> -0.89 </td></tr><tr><td> R5 /F </td><td> 0.78 </td><td> F/f6 </td><td> -0.20 </td></tr><tr><td > R6/F </td><td> -0.90 </td><td> R1/R2 </td><td> 5.26 </td></tr></TBODY></TABLE>

In this way, the embodiment can achieve the purpose of large viewing angle, miniaturization, weight reduction, and cost reduction, and can reduce the angle of off-axis incident light, improve imaging quality, system chromatic aberration and aberration (including off-axis aberration). It is corrected that the transverse light fan pattern of different viewing angles is as shown in FIGS. 2A to 2E. It can be seen that the performance of the corrected chromatic aberration of this embodiment is very excellent, and the field curvature performance is as shown in FIG. 2F, and the maximum field curvature is not more than ±0.04 mm. The distortion ratio is as shown in Fig. 2G, the maximum distortion is less than ±80%, and the chromatic aberration is as shown in Fig. 2H. It can be seen that the maximum lateral chromatic aberration is less than ±2 μm. It is obvious that this embodiment has a good imaging effect.

Please refer to FIG. 3 , which is a third embodiment of the present invention. The lens configuration is similar to that of the first embodiment. The design parameters of the six-piece lens of this embodiment are as shown in Table 5 below:

Table 5         <TABLE border="1" borderColor="#000000" width="_0005"><TBODY><tr><td> Lens</td><td> Face </td><td> Curvature Radius (mm) < /td><td> Distance (mm) </td><td> Refractive Index (Nd) </td><td> Dispersion Coefficient (Vd) </td><td> Focal Length (mm) </td>< /tr><tr><td> First lens</td><td> Side 1 </td><td> 14.28 </td><td> 0.24 </td><td> 1.54 </td> <td> 55.99 </td><td> -8.73 </td></tr><tr><td> Image side 2 </td><td> 3.55 </td><td> 0.03 </td> </tr><tr><td> second lens</td><td> object side 3 </td><td> 0.91 </td><td> 0.34 </td><td> 1.66 </td ><td> 20.37 </td><td> -5.37 </td></tr><tr><td> Image side 4 </td><td> 0.62 </td><td> 0.37 </td ></tr><tr><td> Third lens</td><td> Side 5 </td><td> 2.42 </td><td> 0.84 </td><td> 1.54 </ Td><td> 55.99 </td><td> 2.24 </td></tr><tr><td> Image side 6 </td><td> -2.17 </td><td> -0.08 < /td></tr><tr><td> Aperture</td><td> </td><td> ∞ </td><td> 0.30 </td><td> </td><td > </td><td> </td></tr><tr><td> Fourth lens</td><td> Side 7 </td><td> 2.11 </td><td> 0.58 </td><td> 1.54 </td><td > 55.99 </td><td> 2.25 </td></tr><tr><td> Image 8 </td><td> -2.67 </td><td> 0.05 </td></ Tr><tr><td> fifth lens</td><td> object side 9 </td><td> -16.36 </td><td> 0.25 </td><td> 1.64 </td> <td> 23.53 </td><td> -3.63 </td></tr><tr><td> Image side 10 </td><td> 2.75 </td><td> 0.57 </td> </tr><tr><td> sixth lens</td><td> object side 11 </td><td> 1.91 </td><td> 0.40 </td><td> 1.64 </td ><td> 23.53 </td><td> -15.92 </td></tr><tr><td> Image side 12 </td><td> 1.48 </td><td> 0.45 </td ></tr><tr><td> Filter/protective glass</td><td> Object side 13 </td><td> ∞ </td><td> 0.21 </td><td> </td><td> </td><td> </td></tr><tr><td> image side 14 </td><td> ∞ </td><td> 0.35 </td ></tr></TBODY></TABLE>

Based on the foregoing design, the focal length value F of the present embodiment is 2.49 mm, the system length is 4.90 mm, and the maximum viewing angle is 150 ∘.

At this time, the values of the relationship of the six-piece lens are as shown in Table 6 below:

Table 6         <TABLE border="1" borderColor="#000000" width="_0006"><TBODY><tr><td> Relationship </td><td> Value </td><td> Relationship </td ><td> Value</td></tr><tr><td> N6 </td><td> 1.64 </td><td> R7/F </td><td> 0.85 </td> </tr><tr><td> R9/R8 </td><td> 6.13 </td><td> R8/F </td><td> -1.07 </td></tr><tr ><td> ff/fr </td><td> 1.22 </td><td> R9/F </td><td> -6.57 </td></tr><tr><td> f3/ F4+f12/f56 </td><td> 2.15 </td><td> R10/F </td><td> 1.10 </td></tr><tr><td> TTL/f </ Td><td> 1.97 </td><td> R11/F </td><td> 0.77 </td></tr><tr><td> ATL/f </td><td> 1.07 < /td><td> R12/F </td><td> 0.59 </td></tr><tr><td> Gaa/f </td><td> 0.50 </td><td> F /f1 </td><td> -0.29 </td></tr><tr><td> R1/F </td><td> 5.73 </td><td> F/F2 </td> <td> -0.46 </td></tr><tr><td> R2/F </td><td> 1.43 </td><td> F/f3 </td><td> 1.11 </ Td></tr><tr><td> R3/F </td><td> 0.37 </td><td> F/f4 </td><td> 1.11 </td></tr>< Tr><td> R4/F </td><td> 0.25 </td><td> F/f5 </td><td> -0.69 </td></tr><tr><td> R5 /F </td><td> 0.97 </td><td> F/f6 </td><td> -0.16 </td></tr><tr><td > R6/F </td><td> -0.87 </td><td> R1/R2 </td><td> 4.02 </td></tr></TBODY></TABLE>

In this way, the embodiment can achieve the purpose of large viewing angle, miniaturization, weight reduction, and cost reduction, and can reduce the angle of off-axis incident light, improve imaging quality, system chromatic aberration and aberration (including off-axis aberration). It is corrected that the lateral light fan diagrams of different viewing angles are as shown in FIGS. 3A to 3E, and it can be seen that the performance of the corrected chromatic aberration of this embodiment is very excellent, and the field curvature performance is as shown in FIG. 3F, and the maximum field curvature is not more than ±0.04 mm. The distortion ratio is as shown in Fig. 3G, the maximum distortion is less than ±80%, and the chromatic aberration is as shown in Fig. 3H. The maximum lateral chromatic aberration is about ±3 μm. It is obvious that this embodiment has a good imaging effect.

10‧‧‧ first lens
20‧‧‧second lens
30‧‧‧ third lens
40‧‧‧Fourth lens
50‧‧‧ fifth lens
60‧‧‧ sixth lens
70‧‧‧ flat lenses
A‧‧‧ object side
B‧‧‧ image side
ST‧‧‧ aperture
L‧‧‧ optical axis

Figure 1 is a schematic view of the first embodiment of the creation.

1A to 1E are transverse light fan diagrams of the first embodiment at different viewing angles, showing a maximum scale of ±50 μm.

Fig. 1F is a field curvature diagram of the first embodiment of the creation.

Fig. 1G is a distortion diagram of the first embodiment of the creation.

The 1Hth drawing is a lateral chromatic aberration diagram of the first embodiment of the creation.

Fig. 2 is a schematic view showing a second embodiment of the creation.

2A to 2E are transverse light fan diagrams of the second embodiment of the present invention at different viewing angles, and the maximum scale shown is ±50 μm.

Fig. 2F is a field curvature diagram of the second embodiment of the creation.

Fig. 2G is a distortion diagram of the second embodiment of the creation.

The 2Hth drawing is a lateral chromatic aberration diagram of the second embodiment of the creation.

Figure 3 is a schematic view of a third embodiment of the creation.

3A to 3E are transverse light fan diagrams of the third embodiment of the present invention at different viewing angles, and the maximum scale shown is ±50 μm.

Fig. 3F is a field curvature diagram of the third embodiment of the creation.

Fig. 3G is a distortion diagram of the third embodiment of the creation.

Fig. 3H is a lateral chromatic aberration diagram of the third embodiment of the creation.

10‧‧‧ first lens

20‧‧‧second lens

30‧‧‧ third lens

40‧‧‧Fourth lens

50‧‧‧ fifth lens

60‧‧‧ sixth lens

70‧‧‧ flat lenses

A‧‧‧ object side

B‧‧‧ image side

ST‧‧‧ aperture

L‧‧‧ optical axis

Claims (18)

A six-piece miniaturized wide-angle lens includes, in order from the object side to the image side, a first lens having a negative refractive power, a convex side of the object side and a concave side like the side surface, and a second lens having a negative refractive power and a side surface thereof a convex surface and a concave side like a side surface; a third lens having a positive refractive power, a convex side of the object side surface and the image side surface; an aperture; a fourth lens having a positive refractive power, the object side surface and the image side surface being convex surfaces; a fifth lens having a negative refractive power and a concave side of the image side; and a sixth lens having a convex side and a concave side of the image side; wherein the six-piece miniaturized wide-angle lens satisfies the following relationship: 3.8<R1 /R2<5.5, where R1 is the radius of curvature of the side of the first lens and R2 is the radius of curvature of the side of the first lens image. A six-piece miniaturized wide-angle lens includes, in order from the object side to the image side, a first lens having a negative refractive power, a radius of curvature of the object side surface being a positive value, and a curvature radius of the object side surface being larger than a curvature of the image side surface thereof a second lens having a negative refractive power, the radius of curvature of the object side is a positive value, and the radius of curvature of the side of the object is larger than the radius of curvature of the side of the image side; a third lens having a positive refractive power and a curvature of the side of the object The radius is positive, and the radius of curvature of the side of the object is larger than the radius of curvature of the side of the image; an aperture; a fourth lens having a positive refractive power, the radius of curvature of the side of the object is positive, and the radius of curvature of the side of the object is greater than a radius of curvature of the image side surface; a fifth lens having a negative refractive power, a radius of curvature of the image side surface being a positive value; and a sixth lens having a positive radius of curvature of the object side surface and a radius of curvature of the object side surface being greater than The radius of curvature of the image side surface; wherein the six-piece miniaturized wide-angle lens more satisfies the following relationship: 3.8<R1/R2<5.5, where R1 is the first lens object side Radius of curvature, R2 for the radius of curvature of the image side surface of the first lens. The six-piece miniaturized wide-angle lens according to claim 1 or 2, wherein the object side of the fifth lens is a concave surface. A six-piece miniaturized wide-angle lens as claimed in claim 1 or 2, wherein the sixth lens has a negative refractive power. The six-piece miniaturized wide-angle lens according to claim 1 or 2 further satisfies the following relationship: Nd6>1.6; wherein Nd6 is the refractive index of the sixth lens. The six-piece miniaturized wide-angle lens according to claim 1 or 2, wherein the six-piece miniaturized wide-angle lens further satisfies the following relationship: R9/R8>3.5; wherein R8 is the radius of curvature of the side of the fourth lens image, R9 Is the radius of curvature of the side of the fifth lens. The six-piece miniaturized wide-angle lens according to claim 1 or 2, wherein the six-piece miniaturized wide-angle lens further satisfies the following relationship: 0<ff/fr<2; wherein ff is a synthesis of the first to third lenses The focal length value, fr is the composite focal length value of the fourth to sixth lenses. The six-piece miniaturized wide-angle lens according to claim 1 or 2, wherein the six-piece miniaturized wide-angle lens further satisfies the following relationship: 1<f3/f4+f12/f56<4; wherein f3 is the third lens The focal length value, f4 is the focal length value of the fourth lens, f12 is the composite focal length value of the first and second lenses, and f56 is the composite focal length value of the fifth and sixth lenses. The six-piece miniaturized wide-angle lens according to claim 1 or 2, wherein the six-piece miniaturized wide-angle lens further satisfies the following relationship: 5.5<R1/F<8; 1.2<R2/F<1.7; -0.35<F /f1<-0.25; where f1 is the focal length value of the first lens, and F is the system focal length value of the six-piece miniaturized wide-angle lens. The six-piece miniaturized wide-angle lens according to claim 1 or 2, wherein the six-piece miniaturized wide-angle lens further satisfies the following relationship: 0.32 < R3 / F < 0.45; 0.2 < R4 / F < 0.3; - 0.55 < F /f2<-0.4; wherein R3 is the radius of curvature of the side of the second lens, R4 is the radius of curvature of the side of the second lens image, f2 is the focal length of the second lens, and F is the six-piece miniaturized wide-angle lens System focal length value. The six-piece miniaturized wide-angle lens according to claim 1 or 2, wherein the six-piece miniaturized wide-angle lens further satisfies the following relationship: 0.7<R5/F<1.2; -1<R6/F<-0.8; 1< F/f3<1.3; wherein R5 is the radius of curvature of the side of the third lens, R6 is the radius of curvature of the side of the third lens image, f3 is the focal length of the third lens, and F is the six-piece miniaturized wide-angle lens System focal length value. The six-piece miniaturized wide-angle lens according to claim 1 or 2, wherein the six-piece miniaturized wide-angle lens further satisfies the following relationship: 0.8<R7/F<1.1; -1.2<R8/F<-0.7; 1< F/f4<1.3; wherein R7 is the radius of curvature of the side of the fourth lens, R8 is the radius of curvature of the side of the fourth lens image, f4 is the focal length of the fourth lens, and F is the six-piece miniaturized wide-angle lens System focal length value. The six-piece miniaturized wide-angle lens according to claim 1 or 2, wherein the six-piece miniaturized wide-angle lens further satisfies the following relationship: -23<R9/F<-5; 0.7<R10/F<1.2; <F/f5<-0.6; wherein R9 is the radius of curvature of the side of the fifth lens, R10 is the radius of curvature of the side of the fifth lens image, f5 is the focal length of the fifth lens, and F is the six-piece small The system focal length value of the wide-angle lens. The six-piece miniaturized wide-angle lens according to claim 1 or 2, wherein the six-piece miniaturized wide-angle lens further satisfies the following relationship: 0.65 < R11 / F < 1.5; 0.45 < R12 / F < 1.5; - 0.25 < F /f6<-0.08; wherein R11 is the radius of curvature of the side of the sixth lens, R12 is the radius of curvature of the side of the sixth lens image, f6 is the focal length of the sixth lens, and F is the six-piece miniaturized wide-angle lens System focal length value. The six-piece miniaturized wide-angle lens according to claim 1 or 2, wherein the six-piece miniaturized wide-angle lens further satisfies the following relationship: 1.85 < TTL / F < 2.05; wherein the TTL is the system of the six-piece miniaturized wide-angle lens Length, F is the system focal length value of the six-piece miniaturized wide-angle lens. The six-piece miniaturized wide-angle lens according to claim 1 or 2, wherein the six-piece miniaturized wide-angle lens further satisfies the following relationship: 0.85 < ATL / F < 1.2; wherein ATL is the first to sixth lenses in a The sum of the lens thicknesses on the optical axis, F is the system focal length value of the six-piece miniaturized wide-angle lens. The six-piece miniaturized wide-angle lens according to claim 1 or 2, wherein the six-piece miniaturized wide-angle lens further satisfies the following relationship: 0.65 < Gaa / F < 0.4; wherein Gaa is the first to sixth lenses in a The sum of the lens pitches on the optical axis, F is the system focal length value of the six-piece miniaturized wide-angle lens. The six-piece miniaturized wide-angle lens of claim 1 or 2, wherein at least one of the object side and the image side of the sixth lens has an inflection point located off-axis.