TWI805073B - 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, and a sixth 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 and includes a concave surface facing an object side and a convex surface facing the image side. The third lens is with positive refractive power. The fourth lens is with refractive power. The fifth lens is with negative refractive power. The sixth lens is with positive refractive power. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are arranged in order from the object side to the image side along an optical axis.

Description

Wide Angle Lens(38)

The invention relates to a wide-angle lens.

The development trend of today's wide-angle lens, in addition to continuously developing towards a large field of view, with different application requirements, it also needs to have the characteristics of large aperture and high resolution. The conventional wide-angle lens can no longer meet today's needs, so another A wide-angle lens with a new structure can meet the needs of large field of view, large aperture and high resolution at the same time.

In view of this, the main purpose of the present invention is to provide a wide-angle lens with a large field of view, a small aperture value, and a high resolution, but still has good optical performance.

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

The wide-angle lens of the present invention may further include a seventh lens set between the fourth lens and Between the fifth lens.

The seventh lens is a biconvex lens with positive refractive power, and includes a convex surface facing the object side and another convex surface facing the image side.

Wherein the first lens has negative refractive power, and may further include a convex surface facing the object side.

Wherein the second lens has negative refractive power.

The fourth lens is a biconvex lens with positive refractive power, and includes a convex surface facing the object side and another convex surface facing the image side.

Wherein the third lens is a biconvex lens, and includes a convex surface facing the object side and another convex surface facing the image side.

Wherein the fifth lens is a biconcave lens, and includes a concave surface facing the object side and another concave surface facing the image side.

The sixth lens is a biconvex lens, and includes a convex surface facing the object side and another convex surface facing the image side.

f1/f

-0.4；0.8

｜f2/f｜

6.9；0.2

f3/f

3.4；0.2

｜f4/f｜

3.4；0.5

f6/f

3.7；1.7

f7/f

4.5；0.1

BFL/TTL

0.6；4

(R61-R62)/(R61+R62)

10；-11

R11/R22

-0.4；-4

T12/(CT1-CT2)

-2；-8

R41/R42

-1；-0.9

f12/f3456

-0.7；其中，f1為第一透鏡之一有效焦距，f2為第二透鏡之一有效焦距，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，f6為第六透鏡之一有效焦距，f7為第七透鏡之一有效焦距，TTL為第一透鏡之一物側面至一成像面沿著光軸之一間距，BFL為第六透鏡之一像側面至成像面沿著光軸之一間距，R61為第六透鏡之一物側面之一曲率半 徑，R62為第六透鏡之像側面之一曲率半徑，R11為第一透鏡之物側面之一曲率半徑，R22為第二透鏡之一像側面之一曲率半徑，T12為第一透鏡之一像側面至第二透鏡之一物側面沿著光軸之一間距，CT1為第一透鏡之物側面至第一透鏡之像側面沿著光軸之一間距，CT2為第二透鏡之物側面至第二透鏡之像側面沿著光軸之一間距，R41為第四透鏡之一物側面之一曲率半徑，R42為第四透鏡之一像側面之一曲率半徑，f12為第一透鏡及第二透鏡之一組合有效焦距，f3456為第三透鏡、第四透鏡、第五透鏡及第六透鏡之一組合有效焦距。 Among them, the wide-angle lens meets at least one of the following conditions: -7.2

f1/f

-0.4; 0.8

｜f2/f｜

6.9; 0.2

f3/f

3.4; 0.2

｜f4/f｜

3.4; 0.5

f6/f

3.7; 1.7

f7/f

4.5; 0.1

BFL/TTL

0.6; 4

(R61-R62)/(R61+R62)

10;-11

R11/R22

-0.4; -4

T12/(CT1-CT2)

-2; -8

R41/R42

-1; -0.9

f12/f3456

-0.7; where, f1 is the effective focal length of one of the first lenses, f2 is the effective focal length of one of the second lenses, f is one of the effective focal lengths of the wide-angle lens, f3 is the effective focal length of one of the third lenses, and f4 is one of the fourth lenses Effective focal length, f6 is one of the effective focal lengths of the sixth lens, f7 is one of the effective focal lengths of the seventh lens, TTL is the distance from the object side of the first lens to an imaging surface along the optical axis, and BFL is the distance between the sixth lens The distance between the image side and the imaging surface along the optical axis, R61 is the radius of curvature of the object side of the sixth lens, R62 is the radius of curvature of the image side of the sixth lens, R11 is the radius of curvature of the object side of the first lens A radius of curvature, R22 is the radius of curvature of an image side of the second lens, T12 is the distance between the image side of the first lens and the object side of the second lens along the optical axis, CT1 is the object of the first lens The distance from the side to the image side of the first lens along the optical axis, CT2 is the distance from the object side of the second lens to the image side of the second lens along the optical axis, R41 is one of the object sides of the fourth lens Radius of curvature, R42 is the radius of curvature of the image side of the fourth lens, f12 is the combined effective focal length of the first lens and the second lens, f3456 is the distance between the third lens, the fourth lens, the fifth lens and the sixth lens A combination of effective focal lengths.

In order to make the above-mentioned objects, features, and advantages of the present invention more comprehensible, preferred embodiments are specifically cited below and described in detail with the accompanying drawings.

1, 3: wide-angle lens

L11, L31: first lens

L12, L32: second lens

ST1, ST3: Aperture

L13, L33: third lens

L14, L34: fourth lens

L15, L35: fifth lens

L16, L36: sixth lens

L37: seventh lens

OF1, OF3: optical filter

CG1, CG3: Protective glass

IMA1, IMA3: imaging surface

OA1, OA3: optical axis

S11, S31: the object side of the first lens

S12, S32: the side of the first lens image

S13, S33: second lens object side

S14, S34: the second lens image side

S15, S35: aperture surface

S16, S36: third lens object side

S17, S37: The side of the third lens image

S18, S38: The object side of the fourth lens

S19, S39: The side of the fourth lens image

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

S111, S311: the fifth lens image side, the seventh lens image side

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

S113, S313: the sixth lens image side, the fifth lens image side

S114, S314: the object side of the optical filter, the object side of the sixth lens

S115, S315: filter image side, sixth lens image side

S116, S316: protective glass object side, filter object side

S117, S317: protective glass as side, filter as side

S318: Protect the sides of glass objects

S319: Protective glass like side

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

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

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

Figures 4A, 4B, 4C, 4D, 4E, 4F, and 4G are longitudinal aberration diagrams, field curvature diagrams, distortion diagrams, lateral color aberration (Lateral Color) diagrams, and relative illuminance ( Relative Illumination) diagram, Modulation Transfer Function diagram, Through Focus Modulation Transfer Function diagram.

The present invention provides a wide-angle lens, comprising: a first lens with refractive power, This first lens comprises a concave surface towards an image side; a second lens has refractive power, and this second lens is a meniscus lens, and comprises a concave surface towards an object side and a convex surface towards an image side; a third lens has a positive Refractive power; a fourth lens has a refractive power; a fifth lens has a negative refractive power; and a sixth lens has a positive refractive power; wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens They are arranged sequentially 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, Table 8, Table 10 and Table 11 below, wherein Table 1, Table 4, Table 7 and Table 10 are respectively the first wide-angle lens according to the present invention Table 2, Table 5, Table 8, and Table 11 are the relevant parameter tables of each lens from the embodiment to the fourth embodiment, respectively. Parameter table, in the following embodiments, the aspheric surface sag z of the aspheric lens 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 , where: c is the curvature, h is the vertical distance from any point on the lens surface to the optical axis, k is the cone coefficient (Conic Constant), A~C are the aspheric coefficients, and the coefficients E stands for scientific notation, such as E-03 means 10 ^-3 .

Figures 1 and 3 are the lens configuration diagrams of the first and third embodiments of the wide-angle lens of the present invention respectively, and the lens configuration diagrams of the second and fourth embodiments of the remaining wide-angle lens are respectively similar to those of the first and third embodiments, Therefore, the illustration thereof is omitted, but in the following content about the second and fourth embodiments, the symbols of the components of the second and fourth embodiments will continue to be used for convenience of description. The first lenses L11, L21, L31, L41 are meniscus lenses with negative refractive power, made of glass material, the object sides S11, S21, S31, S41 are convex, and the image sides S12, S22, S32, S42 are concave , the object side S11 , S21 , S31 , S41 and the image side S12 , S22 , S32 , S42 are all spherical surfaces.

The second lenses L12, L22, L32, and L42 are meniscus lenses with negative refractive power, Made of glass, the object side S13, S23, S33, S43 is concave, the image side S14, S24, S34, S44 is convex, the object side S13, S23, S33, S43 and the image side S14, S24, S34, S44 All are spherical surfaces.

The third lens L13, L23, L33, L43 is biconvex lens with positive refractive power, made of glass material, its object side S16, S26, S36, S46 is convex, image side S17, S27, S37, S47 is convex, object side S16 , S26 , S36 , S46 and image sides S17 , S27 , S37 , S47 are all aspheric surfaces.

The fourth lens L14, L24, L34, L44 is biconvex lens with positive refractive power, made of glass material, its object side S18, S28, S38, S48 is convex, image side S19, S29, S39, S49 is convex, object side S18 , S28 , S38 , S48 and image sides S19 , S29 , S39 , S49 are all spherical surfaces.

The fifth lenses L15, L25, L35, and L45 are biconcave lenses with negative refractive power and are made of glass material. The object sides S110, S210, S312, and S412 are concave surfaces, and the image sides S111, S211, S313, and S413 are concave surfaces. S110 , S210 , S312 , S412 and image sides S111 , S211 , S313 , S413 are all spherical surfaces.

The sixth lenses L16, L26, L36, and L46 are biconvex lenses with positive refractive power and are made of glass material. The object sides S112, S212, S314, and S414 are convex surfaces, and the image sides S113, S213, S315, and S415 are convex surfaces. S112 , S212 , S314 , S414 and image sides S113 , S213 , S315 , S415 are all aspherical surfaces.

In addition, wide-angle lenses 1, 2, 3, and 4 meet at least one of the following conditions:

Wherein, f is the effective focal length of one of the wide-angle lenses 1, 2, 3, and 4 in the first embodiment to the fourth embodiment, and f1 is the first lens L11, L21, L31, One of the effective focal lengths of L41, f2 is one of the effective focal lengths of the second lenses L12, L22, L32, L42 in the first embodiment to the fourth embodiment, f3 is the third lens in the first embodiment to the fourth embodiment One of the effective focal lengths of L13, L23, L33, and L43, f4 is one of the effective focal lengths of the fourth lens L14, L24, L34, and L44 in the first embodiment to the fourth embodiment, and f6 is the first embodiment to the fourth embodiment In the example, the effective focal length of one of the sixth lenses L16, L26, L36, L46, f7 is the effective focal length of one of the seventh lenses L17, L27, L37, L47 in the first embodiment to the fourth embodiment, and f12 is the first In the embodiment to the fourth embodiment, the combined effective focal length of the first lens L11, L21, L31, L41 and one of the second lenses L12, L22, L32, L42, f3456 is in the first embodiment to the fourth embodiment, the first One of three lenses L13, L23, L33, L43, fourth lens L14, L24, L34, L44, fifth lens L15, L25, L35, L45, sixth lens L16, L26, L36, L46 combined effective focal length, TTL In the first embodiment to the fourth embodiment, the object side S11, S21, S31, S41 of the first lens L11, L21, L31, L41 are respectively to the imaging plane IMA1, IMA2, IMA3, IMA4 along the optical axis OA1, OA2 . , IMA4 along the distance between the optical axes OA1, OA2, OA3, OA4, R11 is the object side S11, S21, S31, S41 of the first lens L11, L21, L31, L41 in the first embodiment to the fourth embodiment One radius of curvature, R22 is the radius of curvature of the image sides S14, S24, S34, S44 of the second lens L12, L22, L32, L42 in the first embodiment to the fourth embodiment, R41 is the radius of curvature of the first embodiment to the fourth embodiment In the fourth embodiment, the radius of curvature of the object side S18, S28, S38, S48 of the fourth lens L14, L24, L34, L44, R42 is the fourth lens L14, L24 in the first embodiment to the fourth embodiment , L34, L44 as a radius of curvature of the side S19, S29, S39, S49, R61 is the first embodiment to the fourth embodiment, the object side S112, S212, S314 of the sixth lens L16, L26, L36, L46 , a radius of curvature of S414, R62 is the radius of curvature of the image side surfaces S113, S213, S315, and S415 of the sixth lens L16, L26, L36, and L46 in the first embodiment to the fourth embodiment, and T12 is the first embodiment For example, in the fourth embodiment, the image sides S12, S22, S32, S42 of the first lenses L11, L21, L31, L41 respectively reach the object sides S13, S23, S33, S43 of the second lenses L12, L22, L32, L42 A distance along the optical axes OA1, OA2, OA3, and OA4, CT1 is the distance between the object sides S11, S21, S31, and S41 of the first lenses L11, L21, L31, and L41 in the first to fourth embodiments, respectively. The image side surfaces S12, S22, S32, and S42 of the first lenses L11, L21, L31, and L41 are along the distances between the optical axes OA1, OA2, OA3, and OA4, and CT2 is the second embodiment in the first to fourth embodiments. The object side S13, S23, S33, S43 of the lens L12, L22, L32, L42 to the image side S14, S24, S34, S44 of the second lens L12, L22, L32, L42 respectively along The distance between one of the optical axes OA1, OA2, OA3, and OA4. The wide-angle lenses 1, 2, 3, and 4 can effectively increase the field of view, effectively reduce the aperture value, effectively improve the resolution, effectively correct aberrations, and effectively correct chromatic aberrations.

｜f2/f｜

6.9及條件(8)：4

(R61-R62)/(R61+R62)

10時，可提供廣角鏡頭足夠的屈光率以控制視場，並有助於修正像差。 When condition (2) is met: 0.8

｜f2/f｜

6.9 and condition (8): 4

(R61-R62)/(R61+R62)

10 o'clock provides enough dioptric power for wide-angle lenses to control the field of view and helps correct aberrations.

R11/R22

-0.4時，可具有適當的曲率半徑以修正畸變。 When condition (9) is met: -11

R11/R22

When -0.4, it can have an appropriate curvature radius to correct distortion.

T12/(CT1-CT2)

-2時，第一透鏡及第二透鏡可具有適當厚度及間距以修正離軸像差。 When the condition (10) is met: -4

T12/(CT1-CT2)

When -2, the first lens and the second lens may have appropriate thickness and spacing to correct off-axis aberrations.

R41/R42

-1及條件(12)：-0.9

f12/f3456

-0.7時，可有效修正像差及提高解析度。 When the condition (11) is met: -8

R41/R42

-1 and condition (12): -0.9

f12/f3456

When -0.7, it can effectively correct the aberration and improve the resolution.

(R61-R62)/(R61+R62)

10及條件(9)：-11

R11/R22

-0.4時，可有效控制視場並有助於修正畸變。 When the condition (8) is satisfied at the same time: 4

(R61-R62)/(R61+R62)

10 and condition (9): -11

R11/R22

At -0.4, it can effectively control the field of view and help correct distortion.

The first embodiment of the wide-angle lens of the present invention will now be described in detail. Please refer to Fig. 1, wide-angle lens 1 comprises a first lens L11, a second lens L12, an aperture ST1, a third lens L13, a fourth lens L14, a fifth lens L15, a sixth lens L16, a Optical filter OF1 and a protective glass CG1. The first lens L11, the second lens L12, the aperture ST1, the third lens L13, the fourth lens L14, the fifth lens L15, the sixth lens L16, the optical filter OF1 and the cover glass CG1 from an object along an optical axis OA1 Arranged in sequence from one side to one image side. During imaging, the light from the object side is finally imaged on an imaging surface IMA1. According to the first to eighth paragraphs of [implementation mode], wherein: the object side S114 and the image side S115 of the optical filter OF1 are both planes; the protective glass CG1 The object side S116 and the image side S117 are both flat; the wide-angle lens 1 can effectively increase the field of view and effectively reduce the aperture by using the above-mentioned lens, the aperture ST1 and the design satisfying at least one of the conditions (1) to (12). value, effective enhancement of resolution, effective correction of aberration, and effective correction of chromatic aberration.

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

Table 2 is a list of relevant parameters of the aspheric surface of the aspheric lens in Table 1.

Table 3 shows the relevant parameter values and their correspondences of the wide-angle lens 1 of the first embodiment Condition (1) to condition (5) and condition (7) to the calculated value of condition (12), as can be seen from Table 3, the wide-angle lens 1 of the first embodiment can all satisfy condition (1) to condition (5) and condition ( 7) Requirements to condition (12).

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 -0.035mm and 0.02mm. It can be seen from FIG. 2B that the field curvature of the wide-angle lens 1 of the first embodiment is between -0.04mm and 0.04mm. It can be seen from FIG. 2C that the distortion of the wide-angle lens 1 of the first embodiment is between -7% and 0%. It is obvious that the longitudinal aberration, curvature of field, and distortion of the wide-angle lens 1 of the first embodiment can be effectively corrected, thereby obtaining better optical performance.

The second embodiment of the wide-angle lens of the present invention will now be described in detail. The wide-angle lens 2 (not shown) comprises a first lens L21, a second lens L22, an aperture ST2, a third lens L23, a fourth lens L24, a fifth lens L25, a sixth lens L26, a filter Optical sheet OF2 and a protective glass CG2. The first lens L21, the second lens L22, the diaphragm ST2, the third lens L23, the fourth lens L24, the fifth lens L25, the sixth lens L26, the optical filter OF2 and the cover glass CG2 from an object along an optical axis OA2 Arranged in sequence from one side to one image side. During imaging, the light from the object side is finally imaged on an imaging surface IMA2. According to the first to eighth paragraphs of [implementation mode], wherein: the object side S214 and the image side S215 of the optical filter OF2 are both planes; the object side S216 and the image side S217 of the protective glass CG2 are both planes; And at least satisfy the design of one of the conditions (1) to (12), so that the wide-angle lens 2 (not shown) can effectively increase the field of view, effectively Effectively reduce the aperture value, effectively increase the resolution, effectively correct the aberration, and effectively correct the chromatic aberration.

Table 4 is a table of relevant parameters of each lens of the wide-angle lens 2 (not shown).

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

Table 6 shows the relevant parameter values of the wide-angle lens 2 (not shown) in the second embodiment and the calculated values corresponding to conditions (1) to (5) and conditions (7) to (12). As can be seen from Table 6, The wide-angle lens 2 (not shown) of the second embodiment can all satisfy the requirements of conditions (1) to (5) and conditions (7) to (12).

In addition, the longitudinal aberration (illustration omitted), field curvature (illustration omitted) and distortion (illustration omitted) of the wide-angle lens 2 (not shown) in the second embodiment can also be effectively corrected, thereby obtaining better optical performance.

The third embodiment of the wide-angle lens of the present invention will now be described in detail. Wide-angle lens 3 comprises a first lens L31, a second lens L32, an aperture ST3, a third lens L33, a fourth lens L34, a seventh lens L37, a fifth lens L35, a sixth lens L36, a Filter OF3 and a protective glass CG3. The first lens L31, the second lens L32, the diaphragm ST3, the third lens L33, the fourth lens L34, the seventh lens L37, the fifth lens L35, the sixth lens L36, the optical filter OF3 and the protective glass CG3 along a light The axes OA3 are arranged sequentially from an object side to an image side. During imaging, the light from the object side is finally imaged on an imaging surface IMA3. According to the first to eighth paragraphs of [implementation mode], wherein: the seventh lens L37 is a biconvex lens with positive refractive power, made of glass material, the object side S310 is convex, the image side S311 is convex, the object side S310 and the image side S311 All are spherical surfaces; the object side S316 and the image side S317 of the optical filter OF3 are all planes; the object side S318 and the image side S319 of the protective glass CG3 are all planes; using the above-mentioned lens, aperture ST3 and at least satisfying conditions (1) to Condition (12) The design of one of the conditions enables the wide-angle lens 3 to effectively increase the field of view, effectively reduce the aperture value, effectively improve the resolution, effectively correct aberrations, and effectively correct chromatic aberrations.

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

Table 8 is a table of relevant parameters of the aspheric surface of the aspheric 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 corresponding to conditions (1) to (9) and conditions (11) to (12). As can be seen from Table 9, the third embodiment The wide-angle lens 3 can all satisfy the requirements of condition (1) to condition (9) and condition (11) to condition (12).

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. 4A that the longitudinal aberration of the wide-angle lens 3 of the third embodiment is between -0.02mm and 0.02mm. It can be seen from FIG. 4B that the field curvature of the wide-angle lens 3 of the third embodiment is between -0.03mm and 0.05mm. It can be seen from FIG. 4C that the distortion of the wide-angle lens 3 of the third embodiment is between -9% and 0%. It can be seen from FIG. 4D that the lateral chromatic aberration of the wide-angle lens 3 of the third embodiment is between -1.0 μm and 8.0 μm. It can be seen from FIG. 4E that the relative illuminance of the wide-angle lens 3 of the third embodiment is between 0.79 and 1.0. It can be seen from FIG. 4F that the modulation transfer function value of the wide-angle lens 3 of the third embodiment is between 0.40 and 1.0. It can be seen from FIG. 4G that the wide-angle lens 3 of the third embodiment has a modulation transfer function value between 0.0 and 0.82 when the focus shift is between -0.05mm and 0.05mm. 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, and the relative illuminance, lens resolution, and depth of focus can also meet the requirements, thereby obtaining better optical performance.

The fourth embodiment of the wide-angle lens of the present invention will now be described in detail. Wide-angle lens 4 (not shown) comprises a first lens L41, a second lens L42, an aperture ST4, a third lens L43, a fourth lens L44, a seventh lens L47, a fifth lens L45, a first Six lenses L46, one filter OF4 and one protective glass CG4. The first lens L41, the second lens L42, the aperture ST4, the third lens L43, the fourth lens L44, the seventh lens L47, the fifth lens L45, the sixth lens L46, the optical filter OF4 and the protective glass CG4 along a light The axes OA4 are arranged sequentially from an object side to an image side. During imaging, the light from the object side is finally imaged on an imaging surface IMA4. According to the first to eighth paragraphs of [implementation mode], wherein: the seventh lens L47 is a biconvex lens with positive refractive power, made of glass material, the object side S410 is convex, the image side S411 is convex, the object side S410 and the image side The surface S411 is both a spherical surface; the object side S416 and the image side S417 of the optical filter OF4 are both planes; the object side S418 and the image side S419 of the protective glass CG4 are all planes; using the above-mentioned lens, aperture ST4 and at least satisfying conditions (1 ) to condition (12), the design of one of the conditions enables the wide-angle lens 4 (not shown) to effectively increase the field of view, effectively reduce the aperture value, effectively improve the resolution, effectively correct aberrations, and effectively correct chromatic aberrations.

Table 10 is a table of relevant parameters of each lens of the wide-angle lens 4 (not shown).

Table 11 is a table of relevant parameters of the aspheric surface of the aspheric lens in Table 10.

Table 12 shows the relevant parameter values of the wide-angle lens 4 (not shown) of the fourth embodiment and the calculated values corresponding to conditions (1) to (9) and conditions (11) to (12). Table 12 It can be seen that the wide-angle lens 4 (not shown) of the fourth embodiment can all meet the requirements of conditions (1) to (9) and conditions (11) to (12).

In addition, the longitudinal aberration (illustration omitted), field curvature (illustration omitted), distortion (illustration omitted), and lateral chromatic aberration (illustration omitted) of the wide-angle lens 4 (not shown) of the fourth embodiment can also be effectively corrected, thereby To obtain better optical performance, the relative illuminance (illustration omitted), modulation transfer function (illustration omitted), and defocus modulation transfer function (illustration omitted) can also meet the requirements, thereby obtaining better optical performance.

Although the present invention has been disclosed above in terms of implementation, it is not intended to limit the present invention. Any skilled person 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 defined by the scope of the appended patent application.

1: wide-angle lens

L11: first lens

L12: second lens

ST1: Aperture

L13: third lens

L14: Fourth lens

L15: fifth lens

L16: sixth lens

OF1: filter

CG1: Protective glass

IMA1: imaging surface

OA1: optical axis

S11: The object side of the first lens

S12: The first lens image side

S13: Second lens object side

S14: The second lens image side

S15: Aperture surface

S16: third lens object side

S17: The third lens looks like a side

S18: The fourth lens object side

S19: The fourth lens image side

S110: The object side of the fifth lens

S111: The fifth lens image side

S112: The object side of the sixth lens

S113: The side image of the sixth lens

S114: Filter object side

S115: Filter image side

S116: Protect the side of the glass object

S117: Protective glass like side

Claims (10)

A wide-angle lens, comprising: a first lens has a refractive power, the first lens includes a concave surface facing an image side; a second lens has a refractive power, the second lens is a meniscus lens, and includes a concave surface facing an object side and A convex surface faces the image side; a third lens has positive refractive power; a fourth lens has refractive power; a fifth lens has negative refractive power; and a sixth lens has positive refractive power; wherein the first lens, the second lens, The third lens, the fourth lens, the fifth lens and the sixth lens are arranged in sequence along an optical axis from the object side to the image side; wherein the wide-angle lens satisfies at least one of the following conditions: 0.8

｜f2/f｜

6.9; 0.2

f3/f

3.4; -0.9

f12/f3456

-0.7; Wherein, f2 is an effective focal length of the second lens, f is an effective focal length of the wide-angle lens, f3 is an effective focal length of the third lens, and f12 is a combination of the first lens and the second lens The effective focal length, f3456 is the combined effective focal length of one of the third lens, the fourth lens, the fifth lens and the sixth lens. The wide-angle lens as described in item 1 of the scope of the patent application further includes a seventh lens disposed between the fourth lens and the fifth lens. The wide-angle lens as described in item 2 of the scope of the patent application, wherein the seventh lens is a biconvex lens with positive refractive power, and includes a convex surface facing the object side and another convex surface facing the image side. The wide-angle lens as described in item 1 or item 2 of the patent application, wherein the first lens has negative refractive power, and further includes a convex surface facing the object side. The wide-angle lens as described in item 1 or item 2 of the patent application, wherein the second lens has negative refractive power. The wide-angle lens as described in item 1 or item 2 of the scope of application, wherein the fourth lens is a biconvex lens with positive refractive power, and includes a convex surface facing the object side and another convex surface facing the image side. The wide-angle lens as described in item 1 or item 2 of the scope of application, wherein the third lens is a biconvex lens, and includes a convex surface facing the object side and another convex surface facing the image side. The wide-angle lens as described in item 1 or item 2 of the scope of application, wherein the fifth lens is a biconcave lens, and includes a concave surface facing the object side and another concave surface facing the image side. The wide-angle lens as described in item 1 or item 2 of the scope of application, wherein the sixth lens is a biconvex lens, and includes a convex surface facing the object side and another convex surface facing the image side. The wide-angle lens described in item 1 or item 2 of the scope of the patent application, wherein the wide-angle lens satisfies at least one of the following conditions: -7.2

f1/f

-0.4; 0.2

｜f4/f｜

3.4; 0.5

f6/f

3.7; 1.7

f7/f

4.5; 0.1

BFL/TTL

0.6; 4

(R61-R62)/(R61+R62)

10;-11

R11/R22

-0.4; -4

T12/(CT1-CT2)

-2; -8

R41/R42

-1; Wherein, f1 is an effective focal length of the first lens, f is an effective focal length of the wide-angle lens, f4 is an effective focal length of the fourth lens, f6 is an effective focal length of the sixth lens, and f7 is the effective focal length of the sixth lens. An effective focal length of the seventh lens, TTL is the distance from the object side of the first lens to an imaging surface along the optical axis, and BFL is the distance from an image side of the sixth lens to the imaging surface along the optical axis R61 is the radius of curvature of the object side of the sixth lens, R62 is the radius of curvature of the image side of the sixth lens, R11 is the radius of curvature of the object side of the first lens, R22 is the radius of curvature of an image side of the second lens, T12 is the distance between the image side of the first lens and the object side of the second lens along the optical axis, CT1 is the distance of the first lens The distance from the object side to the image side of the first lens along the optical axis, CT2 is the distance from the object side of the second lens to the image side of the second lens along the optical axis, R41 is A radius of curvature of an object side of the fourth lens, R42 is a radius of curvature of an image side of the fourth lens.

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