TWI701475B - Wide-angle lens assembly - Google Patents

Abstract

A wide-angle lens assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The first lens includes a convex surface facing an object side and a concave surface facing an image side. The second lens includes a convex surface facing the object side and a concave surface facing the image side. The third lens includes a concave surface facing the object side and another concave surface facing the image side. The fourth lens is with positive refractive power and includes a convex surface facing the object side and another convex surface facing the image side. The fifth lens is with positive refractive power and includes a convex surface facing the object side and another convex surface facing the image side. The sixth and seventh lenses are with refractive power. The eighth lens is with positive refractive power and includes a convex surface facing the object side and another convex surface facing the image side.

Description

Wide-angle lens (25)

The invention relates to a wide-angle lens.

The development trend of today's wide-angle lens is not only toward miniaturization and large field of view. With different application requirements, it also needs to have high brightness, high resolution and resistance to environmental temperature changes. The conventional wide-angle lens can no longer meet the requirements. Today’s demand requires another wide-angle lens with a new architecture to simultaneously meet the needs of miniaturization, large field of view, high brightness, high resolution, and resistance to environmental temperature changes.

In view of this, the main purpose of the present invention is to provide a wide-angle lens which has a shorter overall length, a larger field of view, higher brightness, higher resolution, resistance to environmental temperature changes, but still has good optical performance.

The wide-angle lens of the present invention includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The first lens has refractive power. The first lens includes a convex surface facing an object side and a concave surface facing an image side. The second lens has refractive power. The second lens includes a convex surface facing the object side and a concave surface facing the image side. The third lens has refractive power. The third lens includes a concave surface facing the object side and another concave surface facing the image side. The fourth lens has positive refractive power. The fourth lens includes a convex surface facing the object side and The other convex surface faces the image side. The fifth lens has positive refractive power. The fifth lens includes a convex surface facing the object side and another convex surface facing the image side. The sixth lens has refractive power. The seventh lens has refractive power. The eighth lens has positive refractive power. The eighth lens includes a convex surface facing the object side and another convex surface facing the image side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are arranged in order from the object side to the image side along an optical axis.

The wide-angle lens of the present invention may further include a ninth lens disposed between the seventh lens and the eighth lens.

The wide-angle lens of the present invention may further include a tenth lens disposed between the ninth lens and the eighth lens, and the ninth lens and the tenth lens are cemented.

The ninth lens has positive refractive power and includes a convex surface facing the object side and another convex surface facing the image side.

The tenth lens has negative refractive power and includes a concave surface facing the object side and a convex surface facing the image side.

The first lens has negative refractive power, the second lens has negative refractive power, and the third lens has negative refractive power.

The sixth lens element has positive refractive power. The sixth lens element includes a convex surface facing the object side and another convex surface facing the image side.

The seventh lens has negative refractive power, and the seventh lens includes a concave surface facing the object side and another concave surface facing the image side.

The sixth lens is cemented with the seventh lens.

The wide-angle lens satisfies the following conditions: 0<f/IH<1; where f is the effective focal length of the wide-angle lens, and IH is the half-image height of the wide-angle lens.

The wide-angle lens satisfies the following conditions: 4.5mm<R ₂₁ -R ₂₂ <13.5mm; wherein R ₂₁ is a curvature radius of an object side surface of the second lens, and R ₂₂ is a curvature radius of an image side surface of the second lens.

The wide-angle lens satisfies the following conditions: -10<R ₃₁ /R ₃₂ <0; where R ₃₁ is a curvature radius of an object side surface of the third lens, and R ₃₂ is a curvature radius of an image side surface of the third lens.

The wide-angle lens meets the following conditions: 0.5<(f ₃ +f ₈ )/f<3; where f is one of the effective focal lengths of the wide-angle lens, f ₃ is one of the effective focal lengths of the third lens, and f ₈ is one of the effective focal lengths of the eighth lens focal length.

The wide-angle lens satisfies the following conditions: 10<Vd ₅ /Nd ₅ <58; among them, Vd ₅ is one of the Abbe coefficients of the fifth lens, and Nd ₅ is the refractive index of the fifth lens.

The wide-angle lens satisfies the following conditions: 7.2<|f ₁ /f|<11; where f is an effective focal length of the wide-angle lens, and f ₁ is an effective focal length of the first lens.

The wide-angle lens satisfies the following conditions: -5mm<R ₁₀₁ +R ₁₀₂ <-15mm; where R ₁₀₁ is a radius of curvature of an object side of the tenth lens, and R ₁₀₂ is a radius of curvature of an image side of the tenth lens.

In order to make the above-mentioned objects, features, and advantages of the present invention more obvious and understandable, the following specifically describes preferred embodiments in conjunction with the accompanying drawings.

1, 2, 3‧‧‧Wide-angle lens

L11, L21, L31‧‧‧First lens

L12, L22, L32‧‧‧Second lens

L13, L23, L33‧‧‧third lens

L14, L24, L34‧‧‧Fourth lens

L15, L25, L35‧‧‧Fifth lens

ST1, ST2, ST3‧‧‧Aperture

L16, L26, L36‧‧‧Sixth lens

L17, L27, L37‧‧‧Seventh lens

L19, L29, L39‧‧‧Ninth lens

L110, L210, L310‧‧‧Tenth lens

L18, L28, L38‧‧‧Eighth lens

OF1, OF2, OF3‧‧‧Filter

CG1, CG2, CG3‧‧‧protective glass

IMA1, IMA2, IMA3‧‧‧imaging surface

OA1, OA2, OA3‧‧‧Optical axis

S11, S21, S31‧‧‧Object side of the first lens

S12, S22, S32‧‧‧The side of the first lens image

S13, S23, S33‧‧‧Object side of the second lens

S14, S24, S34‧‧‧Second lens image side

S15, S25, S35‧‧‧Object side of third lens

S16, S26, S36‧‧‧Third lens image side

S17, S27, S37‧‧‧Object side of the fourth lens

S18, S28, S38‧‧‧Fourth lens image side

S19, S29, S39‧‧‧Fifth lens object side

S110, S210, S310‧‧‧Fifth lens image side

S111, S211, S311‧‧‧Aperture surface

S112, S212, S312‧‧‧Sixth lens object side

S113, S213, S313‧‧‧Sixth lens image side (7th lens object side)

S114, S214, S314‧‧‧Seventh lens image side

S115, S215, S315‧‧‧Object side of the ninth lens

S116, S216, S316‧‧‧Ninth lens image side (tenth lens object side)

S117, S217, S317‧‧‧Tenth lens image side

S118, S218, S318‧‧‧Object side of the eighth lens

S119, S219, S319‧‧‧8th lens image side

S120, S220, S320‧‧‧The side of the filter object

S121, S221, S321‧‧‧Filter image side

S122, S222, S322‧‧‧Protect the side of the glass object

S123, S223, S323‧‧‧Protect the side of the glass image

FIG. 1 is a schematic diagram of the lens configuration of the first embodiment of the wide-angle lens according to the present invention.

FIG. 2A is a distortion diagram of the first embodiment of the wide-angle lens according to the present invention.

Figure 2B is a diagram of Through Focus Modulation Transfer Function (Through Focus Modulation Transfer Function) of the first embodiment of the wide-angle lens according to the present invention when the temperature is equal to -40°C, 20°C, and 80°C.

Fig. 2C is a diagram of the defocus modulation conversion function diagram of the first embodiment of the wide-angle lens according to the present invention when the wavelengths are red, green, and blue light and infrared light.

FIG. 3 is a schematic diagram of the lens configuration of the second embodiment of the wide-angle lens according to the present invention.

FIG. 4A is a distortion diagram of the second embodiment of the wide-angle lens according to the present invention.

Fig. 4B is a graph of the defocus modulation transfer function diagram of the second embodiment of the wide-angle lens according to the present invention when the temperature is -40°C, 20°C, and 80°C, respectively.

Fig. 4C is a diagram of the defocus modulation conversion function diagram of the second embodiment of the wide-angle lens according to the present invention when the wavelengths are red, green, and blue light and infrared light.

FIG. 5 is a schematic diagram of the lens configuration of the third embodiment of the wide-angle lens according to the present invention.

FIG. 6A is a distortion diagram of the third embodiment of the wide-angle lens according to the present invention.

Fig. 6B is a diagram of the defocus modulation transfer function diagram of the third embodiment of the wide-angle lens according to the present invention when the temperature is equal to -40°C, 20°C, and 80°C.

Fig. 6C is a diagram of the defocus modulation conversion function diagram of the third embodiment of the wide-angle lens according to the present invention when the wavelengths are red, green, and blue light and infrared light.

The present invention provides a wide-angle lens comprising: a first lens having refractive power, the first lens including a convex surface facing an object side and a concave surface facing an image side; a second lens having refractive power, the second lens including a convex surface facing the object Side and a concave surface facing the image side; a third lens with refractive power, the third lens includes a concave surface facing the object side and another concave surface facing the image side; The four lenses have positive refractive power, the fourth lens includes a convex surface facing the object side and the other convex surface facing the image side; a fifth lens has positive refractive power, the fifth lens includes a convex surface facing the object side and the other convex surface facing the image side; A sixth lens has refractive power; a seventh lens has refractive power; and an eighth lens has positive refractive power. The eighth lens includes a convex surface facing the object side and another convex surface facing the image side; wherein the first lens, the second lens, The third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are arranged in order from the object side to the image side along an optical axis.

Please refer to Table 1, Table 3, and Table 5 below. Table 1, Table 3, and Table 5 are related parameter tables of the lenses of the first embodiment to the third embodiment of the wide-angle lens according to the present invention.

Figures 1, 3, and 5 are schematic diagrams of the lens configuration of the first, second, and third embodiments of the wide-angle lens of the present invention. The first lenses L11, L21, and L31 are meniscus lenses with negative refractive power and are made of glass. The object side surfaces S11, S21, S31 are convex surfaces, the image side surfaces S12, S22, S32 are concave surfaces, and the object side surfaces S11, S21, S31 and the image side surfaces S12, S22, S32 are spherical surfaces.

The second lenses L12, L22, and L32 are meniscus lenses with negative refractive power and are made of glass. The object side surfaces S13, S23, S33 are convex surfaces, the image side surfaces S14, S24, and S34 are concave surfaces, and the object side surfaces S13, S23, S33 and the image side surface S14, S24, S34 are all spherical surfaces.

The third lens L13, L23, L33 is a biconcave lens with negative refractive power, made of glass material, its object side S15, S25, S35 are concave, the image side S16, S26, S36 are concave, the object side S15, S25, S35 and The image sides S16, S26, and S36 are all spherical surfaces.

The fourth lens L14, L24, L34 is a double convex lens with positive refractive power, made of glass material, its object side surface S17, S27, S37 is convex, and the image side surface S18, S28, S38 is convex The object side surfaces S17, S27, S37 and the image side surfaces S18, S28, S38 are all spherical surfaces.

The fifth lens L15, L25, and L35 are biconvex lenses with positive refractive power and are made of glass. The object side surfaces S19, S29, S39 are convex surfaces, the image side surfaces S110, S210, and S310 are convex surfaces, and the object side surfaces S19, S29, S39 and The image sides S110, S210, and S310 are all spherical surfaces.

The sixth lens L16, L26, and L36 are biconvex lenses with positive refractive power and are made of glass. The object side surfaces S112, S212, and S312 are convex surfaces. The image side surfaces S113, S213, and S313 are convex surfaces. The object side surfaces S112, S212, S312 and The image side surfaces S113, S213, and S313 are all spherical surfaces.

The seventh lens L17, L27, and L37 are biconcave lenses with negative refractive power and are made of glass. The object side surfaces S113, S213, S313 are concave surfaces, the image side surfaces S114, S214, and S314 are concave surfaces, and the object side surfaces S113, S213, S313 and The image sides S114, S214, and S314 are all spherical surfaces.

The ninth lens L19, L29, and L39 are biconvex lenses with positive refractive power and are made of glass. The object side surfaces S115, S215, S315 are convex surfaces, and the image side surfaces S116, S216, S316 are convex surfaces. The object side surfaces S115, S215, S315 and The image sides S116, S216, and S316 are all spherical surfaces.

The tenth lens L110, L210, and L310 are meniscus lenses with negative refractive power and are made of glass. The object side surfaces S116, S216, and S316 are concave surfaces, the image side surfaces S117, S217, and S317 are convex surfaces, and the object side surfaces S116, S216, S316 and the image sides S117, S217, and S317 are all spherical surfaces.

The eighth lens L18, L28, L38 is a double convex lens with positive refractive power, made of glass material, its object side S118, S218, S318 are convex, like side S119, S219, S319 It is a convex surface, and the object side surfaces S118, S218, and S318 and the image side surfaces S119, S219, S319 are all spherical surfaces.

The sixth lenses L16, L26, and L36 are cemented with the seventh lenses L17, L27, and L37, respectively.

The ninth lenses L19, L29, and L39 are cemented with the tenth lenses L110, L210, and L310, respectively.

In addition, wide-angle lenses 1, 2, and 3 meet at least one of the following conditions:

0<f/IH<1 (1)

4.5mm<R ₂₁ -R ₂₂ <13.5mm (2)

-10<R ₃₁ /R ₃₂ <0 (3)

0.5<(f ₃ +f ₈ )/f<3 (4)

10<Vd ₅ /Nd ₅ <58 (5)

7.2<|f ₁ /f|<11 (6)

-5mm<R ₁₀₁ +R ₁₀₂ <-15mm (7)

Among them, f is the effective focal length of one of the wide-angle lenses 1, 2, and 3 in the first to third embodiments, and f ₁ is one of the first lenses L11, L21, L31 in the first to third embodiments Effective focal length, f ₃ is the effective focal length of one of the third lenses L13, L23, L33 in the first embodiment to the third embodiment, and f ₈ is the eighth lens L18, L28 in the first embodiment to the third embodiment , L38 is an effective focal length, IH is one and a half image heights of wide-angle lenses 1, 2, and 3 in the first embodiment to the third embodiment, and R ₂₁ is the second lens L12, A radius of curvature of the object side surfaces S13, S23, S33 of L22, L32, R ₂₂ is a radius of curvature of the image side surfaces S14, S24, S34 of the second lens L12, L22, L32 in the first to third embodiments , R ₃₁ is a radius of curvature of the object sides S15, S25, S35 of the third lenses L13, L23, L33 in the first to third embodiments, and R ₃₂ is in the first to third embodiments, The third lens L13, L23, L33 has a radius of curvature of the image side surfaces S16, S26, S36, R ₁₀₁ is the object side surface S116, S216, S216, S316 is a radius of curvature, R ₁₀₂ is a curvature radius of the image side surfaces S117, S217, S317 of the tenth lens L110, L210, L310 in the first to third embodiments, and Vd ₅ is the first to third embodiments. In the three embodiments, one of the Abbe coefficients of the fifth lenses L15, L25, and L35, and Nd ₅ is the refractive index of one of the fifth lenses L15, L25, and L35 in the first to third embodiments. The wide-angle lens 1, 2, and 3 can effectively shorten the total length of the lens, effectively increase the field of view, effectively increase the brightness, effectively improve the resolution, effectively resist environmental temperature changes, effectively correct aberrations, and effectively correct chromatic aberrations.

The first embodiment of the wide-angle lens of the present invention will now be described in detail. Please refer to Fig. 1, the wide-angle lens 1 includes a first lens L11, a second lens L12, a third lens L13, a fourth lens L14, and a fourth lens L11 in sequence from an object side to an image side along an optical axis OA1. A fifth lens L15, an aperture ST1, a sixth lens L16, a seventh lens L17, a ninth lens L19, a tenth lens L110, an eighth lens L18, a filter OF1 and a protective glass CG1. When imaging, the light from the object side is finally imaged on an imaging surface IMA1. According to [Implementation Mode] paragraphs 1 to 14, where:

The object side S120 and the image side S121 of the filter OF1 are both flat surfaces;

The protective glass CG1, the object side S122 and the image side S123 are both flat;

Using the above-mentioned lens, aperture ST1 and a design that meets at least one of conditions (1) to (7), the wide-angle lens 1 can effectively shorten the total length of the lens, effectively increase the field of view, effectively increase the brightness, and effectively improve the resolution. Degree, effective resistance to environmental temperature changes, effective Correction of aberration, effective correction of chromatic aberration.

Table 1 is a table of related parameters of each lens of the wide-angle lens 1 in Figure 1.

Table 2 shows the relevant parameter values of the wide-angle lens 1 of the first embodiment and the calculated values of the corresponding conditions (1) to (7). From Table 2, it can be seen that the wide-angle lens 1 of the first embodiment can all satisfy the conditions (1) to The requirement of condition (7).

In addition, the optical performance of the wide-angle lens 1 of the first embodiment can also meet the requirements.

It can be seen from Fig. 2A that the distortion of the wide-angle lens 1 of the first embodiment is between -5% and 0%. It can be seen from Figure 2B that the wide-angle lens 1 of the first embodiment, when the temperature is equal to -20°C, 40°C, and 80°C, and the focus shift is between -0.05mm to 0.05mm, the modulation transfer function value Between 0.0 and 0.75. It can be seen from Figure 2C that the wide-angle lens 1 of the first embodiment, when the wavelengths are red, green and blue light and infrared light, and the focus shift is between -0.05mm to 0.05mm, the modulation transfer function The value is between 0.0 and 0.74.

It is obvious that the distortion of the wide-angle lens 1 of the first embodiment can be effectively corrected, and the focal depth of high and low temperature, the focal depth of visible light and infrared light can all meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 3, which is a schematic diagram of the lens configuration of the second embodiment of the wide-angle lens according to the present invention. The wide-angle lens 2 includes a first lens L21, a second lens L22, a third lens L23, a fourth lens L24, a fifth lens L25, and a third lens L21, a second lens L22, a third lens L23, a fourth lens L24, a fifth lens L25, and a The aperture ST2, a sixth lens L26, a seventh lens L27, a ninth lens L29, a tenth lens L210, an eighth lens L28, a filter OF2 and a protective glass CG2. When imaging, the light from the object side is finally imaged on an imaging surface IMA2. According to [Implementation Mode] paragraphs 1 to 14, where:

The object side S220 and the image side S221 of the filter OF2 are both flat surfaces;

The protective glass CG2, the object side S222 and the image side S223 are both flat;

Using the above-mentioned lens, aperture ST2, and a design that meets at least one of the conditions (1) to (7), the wide-angle lens 2 can effectively shorten the total length of the lens and effectively increase the view. Field, effectively increase brightness, effectively improve resolution, effective resistance to environmental temperature changes, effective correction of aberration, effective correction of chromatic aberration.

Table 3 is a table of related parameters of each lens of the wide-angle lens 2 in Figure 3.

Table 4 shows the relevant parameter values of the wide-angle lens 2 of the second embodiment and the calculated values of the corresponding conditions (1) to (7). From Table 4, it can be seen that the wide-angle lens 2 of the second embodiment can all satisfy the conditions (1) to The requirement of condition (7).

In addition, the optical performance of the wide-angle lens 2 of the second embodiment can also meet the requirements.

It can be seen from FIG. 4A that the distortion of the wide-angle lens 2 of the second embodiment is between -3% and 0%.

It can be seen from Figure 4B that the wide-angle lens 2 of the second embodiment, when the temperature is equal to -20°C, 40°C, and 80°C, and the focus shift is between -0.05mm to 0.05mm, the modulation transfer function value Between 0.0 and 0.72.

It can be seen from Figure 4C that the wide-angle lens 2 of the second embodiment, when the wavelengths are red, green and blue light and infrared light, and the focus shift is between -0.05mm to 0.05mm, the modulation transfer function The value is between 0.0 and 0.72.

It is obvious that the distortion of the wide-angle lens 2 of the second embodiment can be effectively corrected, and the focal depth of high and low temperature, the focal depth of visible light and infrared light can all meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 5, which is a schematic diagram of the lens configuration of the third embodiment of the wide-angle lens according to the present invention. The wide-angle lens 3 includes a first lens L31, a second lens L32, a third lens L33, a fourth lens L34, a fifth lens L35, a fifth lens L35, and a first lens L31, a second lens L32, a third lens L33, a fourth lens L34, a third lens L33, a second lens L31, a third lens L33, a third lens L33, a third lens L33, a third lens L33, a third lens L33, a third lens L33, a fourth lens L34, a Aperture ST3, a sixth lens L36, a seventh lens L37, a ninth lens L39, a tenth lens L310, an eighth lens L38, a filter OF3 and a protective glass CG3. When imaging, the light from the object side is finally imaged on an imaging surface IMA3. According to [Implementation Mode] paragraphs 1 to 14, where:

The object side S320 and the image side S321 of the filter OF3 are both flat surfaces;

The protective glass CG3, the object side S322 and the image side S323 are both flat;

Using the above-mentioned lens, aperture ST3 and a design that meets at least one of the conditions (1) to (7), the wide-angle lens 3 can effectively shorten the total length of the lens, effectively increase the field of view, effectively increase the brightness, and effectively improve the resolution Degree, effective resistance to environmental temperature changes, effective correction of aberration, effective correction of chromatic aberration.

Table 5 is a table of related parameters of each lens of the wide-angle lens 3 in Figure 5.

Table 6 shows the relevant parameter values and corresponding values of the wide-angle lens 3 of the third embodiment The calculated values of conditions (1) to (7) can be seen from Table 6 that the wide-angle lens 3 of the third embodiment can all meet the requirements of conditions (1) to (7).

In addition, the optical performance of the wide-angle lens 3 of the third embodiment can also meet the requirements.

It can be seen from FIG. 6A that the distortion of the wide-angle lens 3 of the third embodiment is between -10% and 0%. It can be seen from Figure 6B that the wide-angle lens 3 of the third embodiment, when the temperature is equal to -20°C, 40°C, and 80°C, and the focus shift is between -0.05mm to 0.05mm, the modulation transfer function value Between 0.0 and 0.73. It can be seen from Figure 6C that the wide-angle lens 3 of the third embodiment, when the wavelengths are red, green, and blue light and infrared light, and the focus shift is between -0.05mm to 0.05mm, the modulation transfer function The value is between 0.0 and 0.73.

It is obvious that the distortion of the wide-angle lens 3 of the third embodiment can be effectively corrected, and the focal depth of high and low temperature, the focal depth of visible light and infrared light can all meet the requirements, thereby obtaining better optical performance.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone familiar with the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be subject to the scope of the attached patent application.

1‧‧‧Wide-angle lens

L11‧‧‧First lens

L12‧‧‧Second lens

L13‧‧‧Third lens

L14‧‧‧Fourth lens

L15‧‧‧Fifth lens

ST1‧‧‧Aperture

L16‧‧‧Sixth lens

L17‧‧‧Seventh lens

L19‧‧‧Ninth lens

L110‧‧‧Tenth lens

L18‧‧‧Eighth lens

OF1‧‧‧Filter

CG1‧‧‧Protection glass

IMA1‧‧‧Image surface

OA1‧‧‧Optical axis

S11‧‧‧Object side of the first lens

S12‧‧‧First lens image side

S13‧‧‧Object side of second lens

S14‧‧‧Second lens image side

S15‧‧‧Third lens object side

S16‧‧‧Third lens image side

S17‧‧‧Fourth lens object side

S18‧‧‧Fourth lens image side

S19‧‧‧Fifth lens object side

S110‧‧‧Fifth lens image side

S111‧‧‧Aperture surface

S112‧‧‧Sixth lens object side

S113‧‧‧Sixth lens image side (7th lens object side)

S114‧‧‧Seventh lens image side

S115‧‧‧Object side of ninth lens

S116‧‧‧Ninth lens image side (10th lens object side)

S117‧‧‧Tenth lens image side

S118‧‧‧The eighth lens object side

S119‧‧‧Eighth lens image side

S120‧‧‧The side of the filter object

S121‧‧‧Filter image side

S122‧‧‧Protect the glass side

S123‧‧‧Protect the side of the glass image

Claims (10)

A wide-angle lens includes: a first lens having refractive power, the first lens including a convex surface facing an object side and a concave surface facing an image side; a second lens having refractive power, the second lens including a convex surface facing the object side and A concave surface facing the image side; a third lens having refractive power, the third lens including a concave surface facing the object side and another concave surface facing the image side; a fourth lens having positive refractive power, the fourth lens including a convex surface facing The object side and the other convex surface face the image side; a fifth lens has positive refractive power, and the fifth lens includes a convex surface facing the object side and another convex surface facing the image side; a sixth lens having refractive power; a seventh lens The lens has refractive power; and an eighth lens has positive refractive power. The eighth lens includes a convex surface facing the object side and another convex surface facing the image side; wherein the first lens, the second lens, the third lens, the The fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens are arranged in order from the object side to the image side along an optical axis; wherein the wide-angle lens meets at least one of the following conditions : 0<f/IH<1;7.2<|f ₁ /f|<11; where f is an effective focal length of the wide-angle lens, IH is a half-image height of the wide-angle lens, and f _{1 is} an effective _{one of} the first lens focal length. According to the wide-angle lens described in claim 1, wherein the wide-angle lens further includes a ninth lens disposed between the seventh lens and the eighth lens. According to the wide-angle lens described in item 2 of the scope of patent application, the wide-angle lens further includes a tenth lens disposed between the ninth lens and the eighth lens, and the ninth lens is cemented with the tenth lens. The wide-angle lens described in item 3 of the scope of patent application, wherein the ninth lens has a positive refractive power and includes a convex surface facing the object side and another convex surface facing the image side. The wide-angle lens described in item 3 of the scope of patent application, wherein the tenth lens has a negative refractive power and includes a concave surface facing the object side and a convex surface facing the image side. According to the wide-angle lens described in claim 1, wherein the first lens has negative refractive power, the second lens has negative refractive power, and the third lens has negative refractive power. According to the wide-angle lens described in claim 1, wherein the sixth lens has positive refractive power, and the sixth lens includes a convex surface facing the object side and another convex surface facing the image side. In the wide-angle lens described in claim 1, wherein the seventh lens has negative refractive power, and the seventh lens includes a concave surface facing the object side and another concave surface facing the image side. The wide-angle lens described in item 1 of the scope of patent application, wherein the sixth lens is cemented with the seventh lens. For the wide-angle lens described in any one of claims 3 to 5 in the scope of the patent application, the wide-angle lens meets at least one of the following conditions: 4.5mm<R ₂₁ -R ₂₂ <13.5mm;-10<R ₃₁ / R ₃₂ <0;0.5<(f ₃ +f ₈ )/f<3;10<Vd ₅ /Nd ₅ <58;-5mm<R ₁₀₁ +R ₁₀₂ <-15mm; where f is one of the wide-angle lenses valid Focal length, R _{21 is a} curvature radius of an object side of the second lens, R _{22 is a} curvature radius of an image side of the second lens, R _{31 is a} curvature radius of an object side of the third lens, R _{32 is} the radius of curvature of an image side surface of the third lens, f _{3 is} an effective focal length of the third lens, f _{8 is} an effective focal length of the eighth lens, and Vd _{5 is} one of the fifth lens. Bay index, Nd _{5 is a} refractive index of the fifth lens, R ₁₀₁ is a curvature radius of an object side surface of the tenth lens, and R _{102 is a} curvature radius of an image side surface of the tenth lens.

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