TWI767679B - 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, and a seventh lens. The first lens is with refractive power and includes a concave surface facing an image side. The second lens is a meniscus lens with refractive power. The third lens is with positive refractive power. The fourth lens is with positive refractive power. The fifth lens is a meniscus lens with refractive power. The sixth lens is with refractive power. The seventh lens is with positive refractive power and includes a concave surface facing the image side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are arranged in order from an object side to the image side along an optical axis.

Description

Wide-angle lens (32)

The present invention relates to a wide-angle lens.

The development trend of today's wide-angle lens, in addition to the continuous development of a large field of view, with different application requirements, it also needs to have the characteristics of large aperture, high resolution and resistance to environmental temperature changes, the conventional wide-angle lens can no longer meet today's needs. , A wide-angle lens with another new architecture is needed to meet the needs of large field of view, large aperture, 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 larger field of view, a smaller aperture value, a higher resolution, and is resistant to changes in ambient temperature, but still has good optical performance.

The invention provides a wide-angle lens including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The first lens has refractive power, and the first lens includes a concave surface facing an image side. The second lens has refractive power, and the second lens is a meniscus lens. The third lens has positive refractive power. The fourth lens has positive refractive power. The fifth lens has refractive power, and the fifth lens is a meniscus lens. The sixth lens has refractive power. The seventh lens has positive refractive power, and the seventh lens includes a concave surface facing the image side. First The lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are sequentially arranged along an optical axis from an object side to an image side.

The invention provides another wide-angle lens including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The first lens has refractive power, and the first lens includes a concave surface facing an image side. The second lens has refractive power, and the second lens is a meniscus lens. The third lens has positive refractive power. The fourth lens has positive refractive power, and the fourth lens includes a concave surface facing an object side. The fifth lens has refractive power, and the fifth lens is a meniscus lens. The sixth lens has positive refractive power. The seventh lens has positive refractive power. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are sequentially arranged along an optical axis from the object side to the image side.

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

The first lens may further include a convex surface facing the object side, and the second lens may include a concave surface facing the object side and a convex surface facing the image side.

The first lens may further include a convex surface facing the object side, and the second lens may include a convex surface facing the object side and a concave surface facing the image side.

The sixth lens includes a convex surface or a concave surface facing the object side.

The third lens includes a convex surface facing the object side and another convex surface facing the image side, the fourth lens includes a convex surface facing the image side, the sixth lens includes a convex surface facing the image side, and the seventh lens includes a convex surface facing the object side.

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

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

((f×FOV×π)/360)×TTL

70mm²×度；L1D/R₁₂

1.8；0.4

L2T1/L2T2

0.8；1.54

Nd2

1.68；1.54

Nd5

1.68；9mm

Nd3×f3

18mm；25mm

Nd4×f4

55mm；20mm

NdLG×fLG

40mm；13mm

fAS2

40mm；3.5mm

fAS

5.5mm；其中，f為廣角鏡頭之一有效焦距，f3為第三透鏡之一有效焦距，f4為第四透鏡之一有效焦距，fLG為最靠近像側之透鏡之一有效焦距，FOV為廣角鏡頭之一視場，TTL為第一透鏡之一物側面至一成像面於光軸上之一間距，L1D為第一透鏡之一像側面之一光學有效直徑，R₁₂為第一透鏡之像側面之一曲率半徑，L2T1為第二透鏡於光軸上之一厚度，L2T2為第二透鏡之一邊緣厚度，Nd2為第二透鏡之一折射率，Nd3第三透鏡之一折射率，Nd4第四透鏡之一折射率，Nd5為第五透鏡之一折射率，NdLG為最靠近像側之透鏡之一折射率，fAS2為光圈往像側算起第二個透鏡之一有效焦距，fAS為光圈至像側間所有透鏡之一組合有效焦距。 The wide-angle lens may further include an aperture disposed between the second lens and the fourth lens, and the wide-angle lens at least satisfies one of the following conditions: 65mm ² × degree

((f×FOV×π)/360)×TTL

70mm ² × degree; L1D/R ₁₂

1.8; 0.4

L2T1/L2T2

0.8; 1.54

Nd2

1.68; 1.54

Nd5

1.68; 9mm

Nd3×f3

18mm; 25mm

Nd4×f4

55mm; 20mm

NdLG×fLG

40mm; 13mm

fAS2

40mm; 3.5mm

fAS

5.5mm; where f is an effective focal length of the wide-angle lens, f3 is an effective focal length of the third lens, f4 is an effective focal length of the fourth lens, fLG is the effective focal length of the lens closest to the image side, and FOV is the effective focal length of the wide-angle lens. A field of view, TTL is the distance between the object side of the first lens and an imaging surface on the optical axis, L1D is an optical effective diameter of an image side of the first lens, R ₁₂ is the distance between the image side of the first lens A curvature radius, L2T1 is a thickness of the second lens on the optical axis, L2T2 is an edge thickness of the second lens, Nd2 is a refractive index of the second lens, Nd3 is a refractive index of the third lens, Nd4 is the fourth lens A refractive index, Nd5 is a refractive index of the fifth lens, NdLG is a refractive index of the lens closest to the image side, fAS2 is an effective focal length of the second lens from the aperture to the image side, fAS is the aperture to the image side The combined effective focal length of one of all lenses between the sides.

In order to make the above objects, features, and advantages of the present invention more clearly understood, preferred embodiments are hereinafter described in detail with the accompanying drawings.

1, 2, 3: Wide-angle lens

L11, L21, L31: The first lens

L12, L22, L32: Second lens

L13, L23, L33: Third lens

L14, L24, L34: Fourth lens

L15, L25, L35: Fifth lens

L16, L26, L36: Sixth lens

L17, L27, L37: Seventh lens

ST1, ST2, ST3: Aperture

OA1, OA2, OA3: Optical axis

OF1, OF2, OF3: Filters

CG1, CG2, CG3: Protective glass

IMA1, IMA2, IMA3: Imaging plane

S11, S21, S31: the object side of the first lens

S12, S22, S32: the image side of the first lens

S13, S23, S33: the object side of the second lens

S14, S24, S34: second lens image side

S15, S25, S36: the object side of the third lens

S16, S26, S37: third lens image side

S17, S27, S35: Aperture surface

S18, S28, S38: the object side of the fourth lens

S19, S29, S39: image side of the fourth lens

S110, S210, S310: the object side of the fifth lens

S111, S211, S311: Image side of the fifth lens

S112, S212, S312: the object side of the sixth lens

S113, S213, S313: image side of sixth lens

S114, S214, S314: the object side of the seventh lens

S115, S215, S315: image side of the seventh lens

S116, S216, S316: Side of filter object

S117, S217, S317: Filter image side

S118, S218, S318: Protect the side of the glass object

S119, S219, S319: Protective glass image side

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

2A, 2B, 2C, and 2D are respectively the first embodiment of the wide-angle lens according to the present invention Longitudinal Aberration, Field Curvature, Distortion, Lateral Color.

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

Figures 4A, 4B, 4C, and 4D are respectively longitudinal aberration diagrams, field curvature diagrams, distortion diagrams, and lateral chromatic aberration diagrams of the second embodiment of the wide-angle lens according to the present invention.

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

6A, 6B, 6C, and 6D are respectively longitudinal aberration diagrams, field curvature diagrams, distortion diagrams, and lateral chromatic aberration diagrams of the third embodiment of the wide-angle lens according to the present invention.

The invention provides a wide-angle lens, comprising: a first lens with refractive power, the first lens includes a concave surface facing an image side; a second lens with refractive power, the second lens is a meniscus lens; a third lens has a positive refractive power; a fourth lens has positive refractive power; a fifth lens has refractive power, the fifth lens is a meniscus lens; a sixth lens has refractive power; and a seventh lens has positive refractive power, the seventh lens includes a concave surface toward the image side; wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are sequentially arranged along an optical axis from an object side to the image side.

The present invention provides another wide-angle lens, comprising: a first lens with refractive power, the first lens includes a concave surface facing an image side; a second lens with refractive power, the second lens is a meniscus lens; a third lens has positive refractive power; a fourth lens has positive refractive power, the fourth lens includes a concave surface facing an object side; a fifth lens has refractive power, the fifth lens is a meniscus lens; a sixth lens has positive refractive power; and a The seventh lens has positive refractive power; wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and The seventh lenses are sequentially arranged along an optical axis from the object side to the image side.

Please refer to Table 1, Table 2, Table 4, Table 5, Table 7 and Table 8 below, where Table 1, Table 4 and Table 7 are the lenses of the first embodiment to the third embodiment of the wide-angle lens according to the present invention, respectively. Table 2, Table 5 and Table 8 are the relevant parameter tables of the aspherical surfaces of the aspherical lenses in Tables 1, 4 and 7 respectively. In the following embodiments, the aspherical surfaces of the aspherical lenses The sag z is obtained by the following formula: z=ch ² /{1+[1-(k+1)c ² h ² ] ^1/2 }+Ah ⁴ +Bh ⁶ +Ch ⁸ +Dh ¹⁰ +Eh ¹² , Among them: c is the curvature, h is the vertical distance from any point on the lens surface to the optical axis, k is the Conic Constant, A~E is the aspheric coefficient, and E in the coefficient represents the scientific notation, such as E-03 means 10 ^-3 .

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, respectively. The first lenses L11, L21, and L31 are meniscus lenses with negative refractive power and are made of glass material. , the object sides S11, S21, S31 are convex, the image sides S12, S22, S32 are concave, and the object sides S11, S21, S31 and the image sides S12, S22, S32 are spherical surfaces. The second lenses L12, L22, and L32 are meniscus lenses with negative refractive power and are made of plastic material. The object sides S13, S23, S33 and the image sides S14, S24, and S34 are all aspherical surfaces. The third lenses L13, L23 and L33 are biconvex lenses with positive refractive power and are made of glass material. The object sides S15, S25 and S36 are convex, the image sides S16, S26 and S37 are convex. Like the side surfaces S16, S26, S37 are spherical surfaces. The fourth lenses L14, L24 and L34 are meniscus lenses with positive refractive power, and the object sides S18, S28 and S38 are concave, which can reduce the reflection of the light blocked by the IR cut filter to the object side of the fourth lens Afterwards, the reflected ghost image is focused, and the side surfaces S19, S29, and S39 are convex. The fifth lenses L15, L25, and L35 are meniscus lenses, which are made of plastic material. Both S211 and S311 are aspherical surfaces. The sixth lenses L16, L26, and L36 have positive refractive power, which helps to disperse the lens sensitivity, and the image sides S113, S213, and S313 thereof are convex. The seventh lens L17, L27, and L37 are meniscus lenses with positive refractive power and are made of glass material. The object sides S114, S214, and S314 are convex, and the image sides S115, S215, and S315 are concave, which can filter infrared light. The light blocked by the film is reflected to the concave image side of the seventh lens, and the ghost image is focused in the light source, so that the ghost image overlaps with the light source and is not easy to find. When it is satisfied that the object side of the fourth lens is concave, the sixth lens has positive refractive power, and the image side of the seventh lens is concave, the generation of ghost images can be effectively reduced.

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

Among them, f is one of the effective focal lengths of the wide-angle lenses 1, 2, and 3 in the first to third embodiments, and f3 is the effective focal length of one of the third lenses L13, L23, and L33 in the first to third embodiments. Focal length, f4 is the effective focal length of the fourth lens L14, L24, L34 in the first to third embodiments, fLG is the effective focal length of the lens closest to the image side in the first to third embodiments Focal length, FOV is one of the fields of view of the wide-angle lenses 1, 2, and 3 in the first to third embodiments, and TTL is one of the first lenses L11, L21, and L31 in the first to third embodiments The distance between the side surfaces S11, S21, S31 to an imaging surface IMA1, IMA2, IMA3 on the optical axis OA1, OA2, OA3, L1D is the first to third embodiments, the first lens L11, L21, L31 in the distance An optical effective diameter of an image side surface S12, S22, S32, R ₁₂ is a curvature radius of an image side surface S12, S22, S32 of an image side surface S12, S22, S32 of the first lens L11, L21, L31 in the first embodiment to the third embodiment, L2T1 is the thickness of the second lenses L12, L22, L32 on the optical axes OA1, OA2, OA3 in the first to third embodiments, and L2T2 is the thickness of the second lens in the first to third embodiments L12, L22, L32 is an edge thickness, Nd2 is a refractive index of the second lens L12, L22, L32 in the first to third embodiments, Nd3 is the first to third embodiments, the first One of the refractive indices of the three lenses L13, L23, and L33, Nd4 is one of the refractive indices of the fourth lens L14, L24, and L34 in the first to third embodiments, and Nd5 is the first to the third embodiment. , a refractive index of the fifth lens L15, L25, L35, NdLG is a refractive index of the lens L17, L27, L37 closest to the image side in the first embodiment to the third embodiment, fAS2 is the first embodiment to In the third embodiment, the apertures ST1, ST2, ST3 are calculated from one of the effective focal lengths of the second lens to the image side, and fAS is the distance from the apertures ST1, ST2, ST3 to the image side in the first to third embodiments. One of the lenses has a combined effective focal length. The wide-angle lenses 1, 2, and 3 can effectively improve the field of view, effectively reduce the aperture value, effectively improve the resolution, and effectively correct aberrations.

((f×FOV×π)/360)×TTL

70mm²×度時，可有效修正畸變。當滿足條件(2)：L1D/R₁₂

1.8時，可有效降低透鏡加工成本。當滿足條件(3)：0.4

L2T1/L2T2

0.8時，可有效降低透鏡 加工成本。當滿足條件(4)：1.54

Nd2

1.68時，可有效修正球面像差。當滿足條件(5)：1.54

Nd5

1.68時，可有效修正球面像差。當滿足條件(6)：9mm

Nd3×f3

18mm時，可有效降低溫度對後焦距偏移量之影響。當滿足條件(7)：25mm

Nd4×f4

5.5mm時，可有效修正場曲。當滿足條件(8)：20mm

NdLG×fLG

40mm時，可有效修正場曲。當滿足條件(9)：13mm

fAS2

40mm時，可有效修正畸變。當滿足條件(10)：3.5mm

fAS

5.5mm時，可有效平衡光圈兩側透鏡組合的敏感度。 When condition (1) is satisfied: 65mm ² × degree

((f×FOV×π)/360)×TTL

Distortion can be effectively corrected at 70mm ² × degree. When condition (2) is satisfied: L1D/R ₁₂

1.8, the lens processing cost can be effectively reduced. When condition (3) is satisfied: 0.4

L2T1/L2T2

When 0.8, the lens processing cost can be effectively reduced. When condition (4) is satisfied: 1.54

Nd2

1.68, spherical aberration can be effectively corrected. When condition (5) is satisfied: 1.54

Nd5

1.68, spherical aberration can be effectively corrected. When condition (6) is satisfied: 9mm

Nd3×f3

At 18mm, the effect of temperature on the back focus shift can be effectively reduced. When condition (7) is satisfied: 25mm

Nd4×f4

At 5.5mm, field curvature can be effectively corrected. When condition (8) is satisfied: 20mm

NdLG×fLG

At 40mm, field curvature can be effectively corrected. When condition (9) is satisfied: 13mm

fAS2

At 40mm, the distortion can be effectively corrected. When condition (10) is satisfied: 3.5mm

fAS

At 5.5mm, it can effectively balance the sensitivity of the lens combination on both sides of the aperture.

The first embodiment of the wide-angle lens of the present invention will now be described in detail. Referring to FIG. 1, the wide-angle lens 1 includes a first lens L11, a second lens L12, a third lens L13, an aperture ST1, a fourth lens L11, a second lens L12, a third lens L13, an aperture ST1, and a fourth lens in sequence from an object side to an image side along an optical axis OA1. Lens L14, a fifth lens L15, a sixth lens L16, a seventh lens L17, a filter OF1 and a protective glass CG1. During imaging, the light from the object side is finally imaged on an imaging plane IMA1. According to the first to fourth paragraphs of [Embodiment], wherein: the object side S13 of the second lens L12 is concave, and the image side S14 is convex; the object side S18 and the image side S19 of the fourth lens L14 are spherical surfaces; the fifth lens L15 has positive refractive power, its object side S110 is convex, and its image side S111 is concave; the sixth lens L16 is a biconvex lens, its object side S112 is convex, and its object side S112 and image side S113 are spherical surfaces; The object side S116 and the image side S117 are both planes; the object side S118 and the image side S119 of the protective glass CG1 are both planes; using the above-mentioned lens, aperture ST1 and the design that satisfies at least one of the conditions (1) to (10), The wide-angle lens 1 can effectively improve the field of view, effectively reduce the aperture value, effectively improve the resolution, and effectively correct aberrations.

Table 1 is a table of relevant parameters of each lens of the wide-angle lens 1 in Fig. 1 .

Table 2 is a table of relevant parameters of the aspheric surfaces of the aspheric lenses in Table 1.

Table 3 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 (10). It can be seen from Table 3 that the wide-angle lens 1 of the first embodiment can meet the conditions (1) to Requirement of condition (10).

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 longitudinal aberration of the wide-angle lens 1 of the first embodiment is between -0.015mm and 0.015mm. It can be seen from FIG. 2B that the field curvature of the wide-angle lens 1 of the first embodiment is between -0.04 mm and 0.03 mm. It can be seen from FIG. 2C that the distortion of the wide-angle lens 1 of the first embodiment is between -10% and 0%. It can be seen from FIG. 2D that the lateral chromatic aberration of the wide-angle lens 1 of the first embodiment is between -2.1 μm and 2.1 μm. It is obvious that the longitudinal aberration, field curvature, distortion, and lateral chromatic aberration of the wide-angle lens 1 of the first embodiment can be effectively corrected, thereby obtaining better optical performance.

Please refer to FIG. 3. FIG. 3 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 , an aperture ST2 , a fourth lens L24 , a fifth lens L24 and a fifth lens in sequence along an optical axis OA2 from an object side to an image side. Lens L25, a sixth lens L26, a seventh lens L27, a filter OF2 and a protective glass CG2. During imaging, the light from the object side is finally imaged on an imaging plane IMA2. According to the first to fourth paragraphs of [Embodiment], wherein: the object side S23 of the second lens L22 is concave, and the image side S24 is convex; the object side S28 and the image side S29 of the fourth lens L24 are spherical surfaces; the fifth lens L25 has positive refractive power, its object side S210 is convex, and its image side S211 is concave; the sixth lens L26 is a meniscus lens, its object side S212 is concave, and both object side S212 and image side S213 are aspheric surfaces; filter The object side S216 and the image side S217 of the sheet OF2 are both planes; the object side S218 and the image side S219 of the protective glass CG2 are both planes; the above-mentioned lens, aperture ST2 and at least one of the conditions (1) to (10) are satisfied. design The wide-angle lens 2 can effectively improve the field of view, effectively reduce the aperture value, effectively improve the resolution, and effectively correct the aberration.

Table 4 is a table of relevant parameters of each lens of the wide-angle lens 2 in Figure 3.

Table 5 is a table of relevant parameters of the aspherical surface of the aspherical lens in Table 4.

Table 6 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 (10). It can be seen from Table 6 that the wide-angle lens 2 of the second embodiment can meet the conditions (1) to Requirement of condition (10).

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 longitudinal aberration of the wide-angle lens 2 of the second embodiment is between -0.01mm and 0.01mm. It can be seen from FIG. 4B that the field curvature of the wide-angle lens 2 of the second embodiment is between -0.04 mm and 0.01 mm. It can be seen from FIG. 4C that the distortion of the wide-angle lens 2 of the second embodiment is between -11% and 0%. It can be seen from FIG. 4D that the lateral chromatic aberration of the wide-angle lens 2 of the second embodiment is between -1.8 μm and 1.8 μm. It is obvious that the longitudinal aberration, field curvature, distortion, and lateral chromatic aberration of the wide-angle lens 2 of the second embodiment can be effectively corrected, thereby obtaining better optical performance.

Please refer to FIG. 5. FIG. 5 is a schematic diagram of a lens configuration of a 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 , an aperture ST3 , a third lens L33 , a fourth lens L34 , a fifth lens L34 , and a fifth lens in sequence along an optical axis OA3 from an object side to an image side Lens L35, a sixth lens L36, a seventh lens L37, a filter OF3 and a protective glass CG3. During imaging, the light from the object side is finally imaged on an imaging plane IMA3. According to the first to fourth paragraphs of [Embodiment], wherein: the object side S33 of the second lens L32 is convex, and the image side S34 is concave; the object side S28 of the fourth lens L34 is concave and the image side The surface S29 is all aspherical surface; the fifth lens L35 has negative refractive power, its object side S310 is a concave surface, and the image side S311 is a convex surface; the sixth lens L36 is a meniscus lens, and its object side S312 is a concave surface, and the object side S312 and S312 are concave. The image side S313 is an aspherical surface; the object side S316 and the image side S317 of the filter OF3 are both planes; the object side S318 and the image side S319 of the protective glass CG3 are both planes; the above-mentioned lens, aperture ST3 and at least meet the conditions The design of one of the conditions (1) to (10) enables the wide-angle lens 3 to effectively increase the field of view, effectively reduce the aperture value, effectively improve the resolution, and effectively correct aberrations.

Table 7 is a table of relevant parameters of each lens of the wide-angle lens 3 in Fig. 5 .

Table 8 is a table of relevant parameters of the aspherical surface of the aspherical lens in Table 7.

Table 9 shows the relevant parameter values of the wide-angle lens 3 of the third embodiment and the calculated values of the corresponding conditions (1) to (10). It can be seen from Table 9 that the wide-angle lens 3 of the third embodiment can meet the conditions (1) to Requirement of condition (10).

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 longitudinal aberration of the wide-angle lens 3 of the third embodiment is between -0.02mm and 0.03mm. It can be seen from FIG. 6B that the field curvature of the wide-angle lens 3 of the third embodiment is between -0.03 mm and 0.05 mm. It can be seen from FIG. 6C that the distortion of the wide-angle lens 3 of the third embodiment is between -12% and 0%. It can be seen from FIG. 6D that the lateral chromatic aberration of the wide-angle lens 3 of the third embodiment is between -1.6 μm and 1.6 μm. It is obvious that the longitudinal aberration, field curvature, distortion, and lateral chromatic aberration of the wide-angle lens 3 of the third embodiment can be effectively corrected, thereby obtaining better optical performance.

Although the present invention has been disclosed above in preferred embodiments, it is not intended to be limited To determine the present invention, any person familiar with the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be defined by the scope of the appended patent application.

1: Wide-angle lens

L11: The first lens

L12: Second lens

L13: Third lens

ST1: Aperture

L14: Fourth lens

L15: Fifth lens

L16: Sixth lens

L17: Seventh lens

OF1: filter

CG1: Protective glass

IMA1: Imaging plane

OA1: Optical axis

S11: Object side of the first lens

S12: The first lens image side

S13: Object side of the second lens

S14: The second lens is like the side

S15: Object side of the third lens

S16: The third lens is like the side

S17: Aperture Surface

S18: Fourth lens object side

S19: Fourth lens like side

S110: Object side of fifth lens

S111: Fifth lens image side

S112: Object side of sixth lens

S113: The sixth lens image side

S114: Seventh lens object side

S115: The seventh lens image side

S116: Side of filter object

S117: Filter like side

S118: Protect the side of glass

S119: Protective glass like side

Claims (10)

A wide-angle lens, comprising: a first lens having refractive power, the first lens comprising a concave surface facing an image side; a second lens having negative refractive power, the second lens being a meniscus lens; a third lens having positive refractive power; A fourth lens has positive refractive power; a fifth lens has refractive power, the fifth lens is a meniscus lens; a sixth lens has positive refractive power; and a seventh lens has positive refractive power, the seventh lens includes a concave surface facing the image side; wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are along an optical axis from an object side to the The images are arranged side by side. A wide-angle lens, comprising: a first lens having refractive power, the first lens comprising a concave surface facing an image side; a second lens having negative refractive power, the second lens being a meniscus lens; a third lens having positive refractive power; a fourth lens with positive refractive power, the fourth lens includes a concave surface facing an object side; a fifth lens with refractive power, the fifth lens is a meniscus lens; a sixth lens with positive refractive power; and a seventh lens Has positive refractive power; wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are along an optical axis from the object side to the The images are arranged side by side. The wide-angle lens according to any one of claims 1 to 2 of the claimed scope, wherein the first lens has negative refractive power. The wide-angle lens of claim 3, wherein: the first lens further includes a convex surface facing the object side; and the second lens includes a concave surface facing the object side and a convex surface facing the image side. The wide-angle lens of claim 3, wherein: the first lens further includes a convex surface facing the object side; and the second lens includes a convex surface facing the object side and a concave surface facing the image side. The wide-angle lens of claim 3, wherein the sixth lens includes a convex surface or a concave surface facing the object side. The wide-angle lens according to any one of claims 1 to 2 of the claimed scope, wherein: the third lens includes a convex surface facing the object side and another convex surface facing the image side; the fourth lens includes a convex surface toward the image side; the sixth lens includes a convex surface toward the image side; and the seventh lens includes a convex surface toward the object side. The wide-angle lens according to any one of claims 1 to 2 of the claimed scope, wherein the fifth lens has positive refractive power, and includes a convex surface facing the object side and a concave surface facing the image side. The wide-angle lens according to any one of claims 1 to 2 of the claimed scope, wherein the fifth lens has negative refractive power, and includes a concave surface facing the object side and a convex surface facing the image side. The wide-angle lens according to any one of claims 1 to 2 of the scope of the patent application, wherein the wide-angle lens further comprises an aperture disposed between the second lens and the fourth lens, and the wide-angle lens satisfies at least one of the following conditions : 65mm ² × degree

((f×FOV×π)/360)×TTL

70mm ² × degree; L1D/R ₁₂

1.8; 0.4

L2T1/L2T2

0.8; 1.54

Nd2

1.68; 1.54

Nd5

1.68; 9mm

Nd3×f3

18mm; 25mm

Nd4×f4

55mm; 20mm

NdLG×fLG

40mm; 13mm

fAS2

40mm; 3.5mm

fAS

5.5mm; wherein, f is an effective focal length of the wide-angle lens, f3 is an effective focal length of the third lens, f4 is an effective focal length of the fourth lens, and fLG is an effective focal length of the lens closest to the image side, FOV is a field of view of the wide-angle lens, TTL is the distance between an object side of the first lens and an imaging surface on the optical axis, L1D is an optical effective diameter of an image side of the first lens, R ₁₂ is a curvature radius of the image side surface of the first lens, L2T1 is a thickness of the second lens on the optical axis, L2T2 is an edge thickness of the second lens, and Nd2 is a refractive index of the second lens , Nd3 is a refractive index of the third lens, Nd4 is a refractive index of the fourth lens, Nd5 is a refractive index of the fifth lens, NdLG is a refractive index of the lens closest to the image side, and fAS2 is the aperture Calculate an effective focal length of the second lens toward the image side, and fAS is the combined effective focal length of one of all lenses between the aperture and the image side.

Images