TWI805340B - 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 negative refractive power and includes a concave surface facing an object side. The second lens is with refractive power. The third lens is with refractive power and includes a convex surface facing the object side. The fourth lens is with refractive power. The fifth lens is with refractive power. The sixth lens is with negative refractive power and includes a concave surface facing the object side. 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 an image side along an optical axis. The wide-angle lens assembly satisfies the following condition: 175 mm²

f × tan(θ) × TTL

190 mm²; wherein f is an effective focal length of the wide-angle lens assembly, θ is a chief ray angle of the wide-angle lens assembly, and TTL is an interval from an object side surface of the first lens to an image plane along the optical axis.

Description

Wide Angle Lens(39)

The invention relates to a wide-angle lens.

The development trend of today's wide-angle lens, in addition to constantly 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. The 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.

f×tan(θ)×TTL

190mm²；2.5

fA/f

4；10mm

f23

15mm；0.09mm

｜Sinf-S3m｜

0.14mm；8mm

f2

11mm；7.5mm

f4

11.5mm；其中，f為廣角鏡頭之一有效焦距，θ為廣角鏡頭之一主光線角度，TTL為第一透鏡之一物側面至一成像面於光軸上之一間距，fA為第一透鏡、第二透鏡及第三透鏡之一組合有效焦距，f23為第二透鏡及第三透鏡之一組合有效焦距，Sinf為當物距為無窮遠時以第一透鏡為對焦透鏡，第一透鏡沿著光軸移動對焦時，第一透鏡之一像側面至第二透鏡之一物側面於光軸上之一間距，S3m為當物距為3公尺時以第一透鏡為對焦透鏡，第一透鏡沿著光軸移動對焦時，第一透鏡之像側面至第二透鏡之物側面於光軸上之一間距，f2為第二透鏡之一有效焦距，f4為第四透鏡之一有效焦距。當本發明之廣角鏡頭滿足上述特徵及條件且不需其他額外的特徵或條件，即可達成本發明之廣角鏡頭之基本功能。 The invention provides a wide-angle lens including a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens has negative refractive power and includes a concave surface facing an object side, the second lens has refractive power, the third lens has refractive power and includes a convex surface facing the object side, the fourth lens has refractive power, and the fifth lens has refractive power , the sixth lens has negative refractive power and includes a concave surface facing the object side. 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 an image side. The wide-angle lens meets at least one of the following conditions: 175mm ²

f×tan(θ)×TTL

190mm ² ; 2.5

fA/f

4; 10mm

f23

15mm; 0.09mm

｜Sinf-S3m｜

0.14mm; 8mm

f2

11mm; 7.5mm

f4

11.5mm; where, f is the effective focal length of the wide-angle lens, θ is the chief ray angle of the wide-angle lens, TTL is the distance between the object side of the first lens and an imaging surface on the optical axis, fA is the first lens, the second The combined effective focal length of the second lens and one of the third lenses, f23 is the combined effective focal length of the second lens and one of the third lenses, Sinf is when the object distance is infinite, the first lens is used as the focusing lens, and the first lens is along the light When the axis moves to focus, the distance between the image side of the first lens and the object side of the second lens on the optical axis, S3m is when the object distance is 3 meters, the first lens is used as the focusing lens, and the first lens is along the When focusing on the optical axis, the distance between the image side of the first lens and the object side of the second lens on the optical axis, f2 is an effective focal length of the second lens, and f4 is an effective focal length of the fourth lens. When the wide-angle lens of the present invention satisfies the above-mentioned features and conditions and does not require other additional features or conditions, the basic functions of the wide-angle lens of the present invention can be achieved.

The second 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 third lens is a meniscus lens with negative refractive power and may further include a concave surface facing the image side.

The fifth lens is a meniscus lens with negative refractive power, and includes a concave surface facing the object side and a convex surface facing the image side.

It may further include a seventh lens disposed between the fourth lens and the fifth lens.

The first lens is a meniscus lens and may further include a convex surface facing the image side, and the fourth lens is a meniscus lens with positive refractive power and includes a concave surface facing the object side and a convex surface facing the image side.

The sixth lens is a biconcave lens, and may further include a concave surface facing the image side.

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

The first lens is a biconcave lens, and may further include a concave surface facing the image side, 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 sixth lens may further include a convex surface facing the image side.

L2T1/L2T2

2.7；0.5

L3T1/L3T2

1；-2.5

f1/f

-1.5；2

Vd2/Vd3

3；2

Vd4/Vd5

3；其中，L2T1為第二透鏡之物側面至第二透鏡之一像側面於光軸上之一間距，L2T2為第二透鏡之一邊緣厚度，L3T1為第三透鏡之一物側面至第三透鏡之一像側面於光軸上之一間距，L3T2為第三透鏡之一邊緣厚度，f1為第一透鏡之一有效焦距，f為廣角鏡頭之有效焦距，Vd2為第二透鏡之一阿貝係數，Vd3為第三透鏡之一阿貝係數，Vd4為第四透鏡之一阿貝係數，Vd5為第五透鏡之一阿貝係數。 Among them, the wide-angle lens meets at least one of the following conditions: 1.7

L2T1/L2T2

2.7; 0.5

L3T1/L3T2

1;-2.5

f1/f

-1.5; 2

Vd2/Vd3

3; 2

Vd4/Vd5

3; Among them, L2T1 is the distance between the object side of the second lens and the image side of the second lens on the optical axis, L2T2 is the edge thickness of the second lens, and L3T1 is the distance between the object side of the third lens and the third lens. The distance between the image side of the lens and the optical axis, L3T2 is the edge thickness of the third lens, f1 is the effective focal length of the first lens, f is the effective focal length of the wide-angle lens, Vd2 is the Abbe coefficient of the second lens , Vd3 is one of the Abbe coefficients of the third lens, Vd4 is one of the Abbe coefficients of the fourth lens, and Vd5 is one of the Abbe coefficients of the fifth lens.

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, 2, 3, 4: wide-angle lens

L11, L21, L31, L41: first lens

L12, L22, L32, L42: second lens

L13, L23, L33, L43: third lens

ST1, ST2, ST3, ST4: Aperture

L14, L24, L34, L44: fourth lens

L15, L25, L35, L45: fifth lens

L16, L26, L36, L46: sixth lens

L37, L47: seventh lens

OF1, OF2, OF3, OF4: Filters

IMA1, IMA2, IMA3, IMA4: imaging surface

OA1, OA2, OA3, OA4: optical axis

S11, S21, S31, S41: the object side of the first lens

S12, S22, S32, S42: the side of the first lens image

S13, S23, S33, S43: second lens object side

S14, S24, S34, S44: the second lens image side

S15, S25, S35, S45: third lens object side

S16, S26, S36, S46: the third lens image side

S17, S27, S37, S47: aperture surface

S18, S28, S38, S48: the object side of the fourth lens

S19, S29, S39, S49: the side of the fourth lens image

S110, S210, S312, S412: the object side of the fifth lens

S111, S211, S313, S413: the side image of the fifth lens

S112, S212, S314, S414: the object side of the sixth lens

S113, S213, S315, S415: the side image of the sixth lens

S310, S410: The object side of the seventh lens

S311, S411: The seventh lens image side

S114, S214, S316, S416: Filter object side

S115, S215, S317, S417: filter like the 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.

Fig. 2 is a schematic diagram of the lens configuration of the third embodiment of the wide-angle lens according to the present invention.

Figures 3, 4, 5, 6, and 7 are respectively the Longitudinal Aberration, Field Curvature, and Distortion diagrams of the third embodiment of the wide-angle lens according to the present invention. Lateral Color diagram, Modulation Transfer Function diagram.

Fig. 8 is a schematic view of the lens configuration of the fourth embodiment of the wide-angle lens according to the present invention.

Figures 9, 10, 11, 12, and 13 are longitudinal aberration diagrams, field curvature diagrams, distortion diagrams, lateral chromatic aberration diagrams, and modulation transfer function diagrams of the fourth embodiment of the wide-angle lens according to the present invention.

f×tan(θ)×TTL

190mm²；其中，f為廣角鏡頭之一有效焦距，θ為廣角鏡頭之一主光線角度，TTL為第一透鏡之一物側面至一成像面於光軸上之一間距。當本發明之廣角鏡頭滿足上述特徵及條件，為本發明之一較佳實施例。 The present invention provides a wide-angle lens, comprising: a first lens with negative refractive power, the first lens includes a concave surface facing toward an object side; a second lens has refractive power; a third lens has refractive power, and the third lens includes a convex surface facing Object side; a fourth lens has refractive power; a fifth lens has refractive power; and a sixth lens has negative refractive power, and the sixth lens includes a concave surface facing the object side; 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; the wide-angle lens meets the following conditions: 175mm ²

f×tan(θ)×TTL

190mm ² ; where, f is an effective focal length of the wide-angle lens, θ is a chief ray angle of the wide-angle lens, and TTL is the distance between the object side of the first lens and an imaging plane on the optical axis. When the wide-angle lens of the present invention satisfies the above features and conditions, it is a preferred embodiment of the present invention.

fA/f

4；其中，f為廣角鏡頭之一有效焦距，fA第一 透鏡、第二透鏡及第三透鏡之一組合有效焦距。當本發明之廣角鏡頭滿足上述特徵及條件，為本發明之一較佳實施例。 The present invention provides another wide-angle lens, comprising: a first lens with negative refractive power, the first lens includes a concave surface facing an object side; a second lens has refractive power; a third lens has refractive power, and the third lens includes a convex surface Toward the object side; a fourth lens has a refractive power; a fifth lens has a refractive power; and a sixth lens has a negative refractive power, and the sixth lens includes a concave surface facing the object side; wherein the first lens, the second lens, and the third lens , the fourth lens, the fifth lens and the sixth lens are arranged in sequence from the object side to the image side along an optical axis; the wide-angle lens satisfies the following conditions: 2.5

fA/f

4; where, f is the effective focal length of one of the wide-angle lenses, and fA is the combined effective focal length of one of the first lens, the second lens and the third lens. When the wide-angle lens of the present invention satisfies the above features and conditions, it is a preferred embodiment of the present invention.

f23

15mm；其中，f23為第二透鏡及第三透鏡之一組合有效焦距。當本發明之廣角鏡頭滿足上述特徵及條件，為本發明之一較佳實施例。 The present invention provides yet another wide-angle lens, comprising: a first lens with negative refractive power, the first lens includes a concave surface facing an object side; a second lens has refractive power; a third lens has refractive power, and the third lens includes a The convex surface faces the object side; a fourth lens has a refractive power; a fifth lens has a refractive power; and a sixth lens has a negative refractive power, and the sixth lens includes a concave surface facing the object side; wherein the first lens, the second lens, the third The lens, the fourth lens, the fifth lens and the sixth lens are arranged in order along an optical axis from the object side to the image side; the wide-angle lens meets the following conditions: 10mm

f23

15mm; where, f23 is the combined effective focal length of one of the second lens and the third lens. When the wide-angle lens of the present invention satisfies the above features and conditions, it is a preferred embodiment of the present invention.

｜Sinf-S3m｜

0.14mm；其中，Sinf為當物距為無窮遠時以第一透鏡為對焦透鏡，第一透鏡沿著光軸移動對焦時，第一透鏡之一像側面至第二透鏡之一物側面於光軸上之一間距，S3m為當物距為3公尺時以第一透鏡為對焦透鏡，第一透鏡沿著光軸移動對焦時，第一透鏡之一像側面至第二透鏡之一物側面於光軸上之一間距。當本發明之廣角鏡 頭滿足上述特徵及條件，為本發明之一較佳實施例。 The present invention provides yet another wide-angle lens, comprising: a first lens with negative refractive power, the first lens includes a concave surface facing an object side; a second lens has refractive power; a third lens has refractive power, and the third lens includes a The convex surface faces the object side; a fourth lens has a refractive power; a fifth lens has a refractive power; and a sixth lens has a negative refractive power, and the sixth lens includes a concave surface facing the object side; wherein the first lens, the second lens, the third The 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; the wide-angle lens satisfies the following conditions: 0.09mm

｜Sinf-S3m｜

0.14mm; where, Sinf is when the object distance is infinite, the first lens is used as the focusing lens, and when the first lens moves along the optical axis to focus, the image side of the first lens to the object side of the second lens is in the light A distance on the axis, S3m is the image side of the first lens to the object side of the second lens when the object distance is 3 meters when the first lens is used as the focusing lens and the first lens moves along the optical axis to focus A distance on the optical axis. When the wide-angle lens of the present invention satisfies the above features and conditions, it is a preferred embodiment of the present invention.

f2

11mm；其中，f2為第二透鏡之一有效焦距。當本發明之廣角鏡頭滿足上述特徵及條件，為本發明之一較佳實施例。 The present invention provides yet another wide-angle lens, comprising: a first lens with negative refractive power, the first lens includes a concave surface facing an object side; a second lens has refractive power; a third lens has refractive power, and the third lens includes a The convex surface faces the object side; a fourth lens has a refractive power; a fifth lens has a refractive power; and a sixth lens has a negative refractive power, and the sixth lens includes a concave surface facing the object side; wherein the first lens, the second lens, the third The lens, the fourth lens, the fifth lens and the sixth lens are arranged in sequence along an optical axis from the object side to an image side; the wide-angle lens meets the following conditions: 8mm

f2

11mm; where, f2 is the effective focal length of one of the second lenses. When the wide-angle lens of the present invention satisfies the above features and conditions, it is a preferred embodiment of the present invention.

f4

11.5mm；其中，f4為第四透鏡之一有效焦距。當本發明之廣角鏡頭滿足上述特徵及條件，為本發明之一較佳實施例。 The present invention provides yet another wide-angle lens, comprising: a first lens with negative refractive power, the first lens includes a concave surface facing an object side; a second lens has refractive power; a third lens has refractive power, and the third lens includes a The convex surface faces the object side; a fourth lens has a refractive power; a fifth lens has a refractive power; and a sixth lens has a negative refractive power, and the sixth lens includes a concave surface facing the object side; wherein the first lens, the second lens, the third The 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; the wide-angle lens satisfies the following conditions: 7.5mm

f4

11.5mm; where, f4 is the effective focal length of one of the fourth lenses. When the wide-angle lens of the present invention satisfies the above features and conditions, it is a preferred embodiment of the present invention.

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 +Dh ¹⁰ +Eh ¹² +Fh ¹⁴ +Gh ¹⁶ , 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~G are aspherical coefficients, and E in the coefficients represents scientific symbols, such as E-03 represents 10 ^-3 .

Figures 1, 2, and 8 are schematic diagrams of the lens configuration of the first, third, and fourth embodiments of the wide-angle lens of the present invention, and the schematic diagrams of the lens configuration of the second embodiment of the other wide-angle lenses are similar to those of the first embodiment, so their illustrations are omitted , but in the following content about the second embodiment, the reference symbols of the second embodiment will continue to be used for convenience of description. Among them, the first lenses L11, L21, L31, L41 have negative refractive power and are made of plastic material. The object sides S11, S21, S31, S41 are concave surfaces, and the object sides S11, S21, S31, S41 and the image sides S12, S22, Both S32 and S42 are aspherical surfaces.

The second lenses L12, L22, L32, and L42 are biconvex lenses with positive refractive power and are made of plastic material. S13 , S23 , S33 , S43 and image sides S14 , S24 , S34 , S44 are all aspheric surfaces.

The third lens L13, L23, L33, L43 is a meniscus lens with negative refractive power, made of glass material, its object side S15, S25, S35, S45 is convex, and the image side S16, S26, S36, S46 is concave, The object sides S15 , S25 , S35 , S45 and the image sides S16 , S26 , S36 , S46 are all aspheric surfaces.

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

The fifth lenses L15, L25, L35, and L45 are meniscus lenses with negative refractive power, Made of glass, the object side S110, S210, S312, S412 is concave, the image side S111, S211, S313, S413 is convex, the object side S110, S210, S312, S412 and the image side S111, S211, S313, S413 All are aspherical surfaces.

The sixth lens L16, L26, L36, L46 has negative refractive power and is made of glass material. The object side S112, S212, S314, S414 is concave, and the object side S112, S212, S314, S414 and the image side S113, S213, S315 , S415 are all aspherical surfaces.

In addition, wide-angle lenses 1, 2, 3, and 4 satisfy at least one of the following conditions (1) to (11), which is a preferred embodiment of the present invention:

Among them, f is one of the effective focal lengths of the wide-angle lenses 1, 2, 3, and 4 in the first embodiment to the fourth embodiment, and θ is the effective focal length of the wide-angle lenses 1, 2, 3, and 4 in the first embodiment to the fourth embodiment. A chief ray angle, TTL is the first embodiment to the fourth embodiment, the first lens L11, L21, The distance between the object side S11, S21, S31, S41 of L31, L41 and the imaging plane IMA1, IMA2, IMA3, IMA4 on the optical axis OA1, OA2, OA3, OA, L2T1 is the first embodiment to the fourth embodiment Among them, the object side S13, S23, S33, S43 of the second lens L12, L22, L32, L42 to the image side S14, S24, S34, S44 of the second lens L12, L22, L32, L42 are on the optical axis OA1, OA2, A distance between OA3 and OA4, L2T2 is the edge thickness of the second lens L12, L22, L32, L42 in the first embodiment to the fourth embodiment, L3T1 is the thickness of the second lens in the first embodiment to the fourth embodiment The object side S15, S25, S35, S45 of the three lenses L13, L23, L33, L43 to the image side S16, S26, S36, S46 of the third lens L13, L23, L33, L43 on the optical axis OA1, OA2, OA3, OA4 The above distance, L3T2 is the edge thickness of the third lens L13, L23, L33, L43 in the first embodiment to the fourth embodiment, f1 is the thickness of the first lens L11 in the first embodiment to the fourth embodiment , L21, L31, L41 one of the effective focal length, Vd2 is the Abbe coefficient of the second lens L12, L22, L32, L42 in the first embodiment to the fourth embodiment, Vd3 is the first embodiment to the fourth embodiment In the example, one Abbe coefficient of the third lens L13, L23, L33, L43, Vd4 is one Abbe coefficient of the fourth lens L14, L24, L34, L44 in the first embodiment to the fourth embodiment, Vd5 is In the first embodiment to the fourth embodiment, one of the Abbe coefficients of the fifth lens L15, L25, L35, L45, fA is the first lens L11, L21, L31, L41 in the first embodiment to the fourth embodiment The combined effective focal length of one of the second lens L12, L22, L32, L42 and the third lens L13, L23, L33, L43, f23 is the first lens L11, L21, L31, L41 in the first embodiment to the fourth embodiment and one of the second lenses L12, L22, L32, L42 combined effective focal length, Sinf is the first embodiment to the fourth embodiment, when the object distance is infinite, the first lens L11, L21, L31, L41 is used as the focus Lens, when the first lenses L11, L21, L31, L41 move and focus along the optical axes OA1, OA2, OA3, OA4, the image sides S12, S22, S32, S42 of the first lenses L11, L21, L31, L41 to the second The distance between the object sides S13, S23, S33, S43 of the lenses L12, L22, L32, L42 on the optical axes OA1, OA2, OA3, OA4, S3m is the distance between the first embodiment and the fourth embodiment, when the object distance is At 3 meters, the first lenses L11, L21, L31, and L41 are used as focusing lenses, and when the first lenses L11, L21, L31, and L41 move along the optical axes OA1, OA2, OA3, and OA4 to focus, the first lenses L11, L21 , L31, L41 image side S12, S22, S32, S42 to the object side S13, S23, S33, S43 of the second lens L12, L22, L32, L42 on the distance between the optical axis OA1, OA2, OA3, OA4, f2 is the effective focal length of one of the second lenses L12, L22, L32, L42 in the first embodiment to the fourth embodiment, and f4 is the fourth lens L14, L24, L34, One of the effective focal lengths of L44. During imaging, the outermost light rays intersect the object side and the image side of the lens at an intersection point, and the distance between the two intersection points along the optical axis is the above-mentioned edge thickness. The wide-angle lenses 1, 2, 3, and 4 can effectively improve the field of view, effectively reduce the aperture value, effectively improve the resolution, effectively correct aberrations, and effectively correct chromatic aberrations.

f×tan(θ)×TTL

190mm²時，可有效修正畸變。當滿足條件(2)：1.7

L2T1/L2T2

2.7時，可有效減少透鏡加工成本。當滿足條件(3)：0.5

L3T1/L3T2

1時，可有效減少透鏡加工成本。當滿足條件(4)：-2.5

f1/f

-1.5時，可有效限制第一透鏡做為對焦透鏡時之有效焦距範圍。當滿足條件(5)：2

Vd2/Vd3

3時，可有效降低橫向色差。當滿足條件(6)：2

Vd4/Vd5

3時，可有效降低橫向色差。當滿足條件(7)：2.5

fA/f

4時，可有效降低第一透鏡、第二透鏡及第三透鏡之敏感度。當滿足條件(8)：10mm

f23

15mm時，可有效提升影像品質。當滿足條件(9)：0.09mm

｜Sinf-S3m｜

0.14mm時，可有效限制第一透鏡做為對焦透鏡時的移動範圍。當滿足條件(10)：8mm

f2

11mm時，可有 效降低第二透鏡敏感度。當滿足條件(11)：7.5mm

f4

11.5mm時，可有效降低第四透鏡敏感度。當同時滿足條件(1)：175mm²

f×tan(θ)×TTL

190mm²、條件(7)：2.5

fA/f

4、條件(8)：10mm

f23

15mm、條件(9)：0.09mm

｜Sinf-S3m｜

0.14mm、條件(10)：8mm

f2

11mm及條件(11)：7.5mm

f4

11.5mm時，可有效降低成像鏡頭敏感度，提高生產良率。 When condition (1) is met: 175mm ²

f×tan(θ)×TTL

190mm ² , it can effectively correct distortion. When the condition (2) is met: 1.7

L2T1/L2T2

2.7, it can effectively reduce the cost of lens processing. When the condition (3) is met: 0.5

L3T1/L3T2

1, can effectively reduce the cost of lens processing. When condition (4) is met: -2.5

f1/f

When -1.5, it can effectively limit the effective focal length range of the first lens as a focusing lens. When the condition (5) is satisfied: 2

Vd2/Vd3

3, can effectively reduce lateral chromatic aberration. When the condition (6) is satisfied: 2

Vd4/Vd5

3, can effectively reduce lateral chromatic aberration. When the condition (7) is satisfied: 2.5

fA/f

4, can effectively reduce the sensitivity of the first lens, the second lens and the third lens. When the condition (8) is met: 10mm

f23

When it is 15mm, it can effectively improve the image quality. When the condition (9) is met: 0.09mm

｜Sinf-S3m｜

When it is 0.14mm, it can effectively limit the moving range of the first lens when it is used as a focusing lens. When the condition (10) is met: 8mm

f2

When it is 11mm, it can effectively reduce the sensitivity of the second lens. When the condition (11) is met: 7.5mm

f4

At 11.5mm, it can effectively reduce the sensitivity of the fourth lens. When the condition (1) is met at the same time: 175mm ²

f×tan(θ)×TTL

190mm ^2. Condition (7): 2.5

fA/f

4. Condition (8): 10mm

f23

15mm, condition (9): 0.09mm

｜Sinf-S3m｜

0.14mm, condition (10): 8mm

f2

11mm and condition (11): 7.5mm

f4

When it is 11.5mm, it can effectively reduce the sensitivity of the imaging lens and improve the production yield.

When the first lens has negative refractive power, it can receive light from a larger angle. When the design of the second lens with positive refractive power and the third lens with negative refractive power can effectively reduce lateral chromatic aberration. When the design of the fourth lens with positive refractive power and the fifth lens with negative refractive power can effectively reduce lateral chromatic aberration. When the sixth lens has negative refractive power, it can effectively increase the chief ray angle.

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, an aperture ST1, a fourth lens L13 from an object side to an image side along an optical axis OA1. The lens L14, a fifth lens L15, a sixth lens L16, and a filter OF1. The first lens L11 is a focusing lens, which can move along the optical axis OA1 to change the distance between the first lens L11 and the second lens L12 to enable the wide-angle lens 1 to focus. During imaging, the light from the object side is finally imaged on an imaging surface IMA1. According to the first to thirteenth paragraphs of [embodiment], wherein: the first lens L11 is a biconcave lens, and its image side S12 is concave; the fourth lens L14 is a biconvex lens, and its object side S18 is a convex surface; the sixth lens L16 is a biconcave lens. Concave lens, its image side S113 is concave; the object side S114 and image side S115 of the optical filter OF1 are all planes; using the above-mentioned lens, aperture ST1 and at least satisfying the design of one of the conditions (1) to (11), so that The wide-angle lens 1 can effectively improve the field of view, effectively reduce the aperture value, effectively improve the resolution, effectively correct aberrations, and effectively correct chromatic 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 list of relevant parameters of the aspheric surface of the aspheric lens in Table 1.

Table 3 shows the relevant parameter values and corresponding items of the wide-angle lens 1 of the first embodiment From the calculated values of condition (1) to condition (11), it can be seen from Table 3 that the wide-angle lens 1 of the first embodiment can all meet the requirements of condition (1) to condition (11).

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) sequentially includes a first lens L21, a second lens L22, a third lens L23, an aperture ST2, and a fourth lens along an optical axis OA2 from an object side to an image side L24, a fifth lens L25, a sixth lens L26 and an optical filter OF2. The six lenses L21 , L22 , L23 , L24 , L25 , L26 and the aperture ST2 can move synchronously along the optical axis OA2 to enable the wide-angle lens 2 (not shown) to focus. During imaging, the light from the object side is finally imaged on an imaging surface IMA2. According to the first to thirteenth paragraphs of the [embodiment], wherein: the first lens L21 is a biconcave lens, and its image side S22 is concave; the fourth lens L24 is a biconvex lens, and its object side S28 is a convex surface; the sixth lens L26 is a curved lens. The image side S213 of the moon-shaped lens is convex; the object side S214 and the image side S215 of the optical filter OF2 are both flat; using the above-mentioned lens, aperture ST2 and a design that satisfies at least one of the conditions (1) to (11) , so that the wide-angle lens 2 (not shown) can effectively improve the field of view, effectively reduce the aperture value, effectively improve the resolution, effectively correct aberrations, and effectively correct chromatic aberrations.

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 (8) and conditions (10) to (11). 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 (8) and conditions (10) to (11).

The third embodiment of the wide-angle lens of the present invention will now be described in detail. Please refer to Fig. 2, the wide-angle lens 3 includes a first lens L31, a second lens L32, a third lens L33, an aperture ST3, and a fourth lens in sequence from an object side to an image side along an optical axis OA3. The lens L34, a seventh lens L37, a fifth lens L35, a sixth lens L36 and an optical filter OF3. The seven lenses L31 , L32 , L33 , L34 , L37 , L35 , L36 and the aperture ST3 can move synchronously along the optical axis OA3 to enable the wide-angle lens 3 to focus. During imaging, the light from the object side is finally imaged on an imaging surface IMA3. According to the first to thirteenth paragraphs of [implementation mode], wherein: the first lens L31 is a meniscus lens, and its image side S32 is a convex surface; the fourth lens L34 is a meniscus lens, and its object side S38 is a concave surface; the seventh Lens L37 is a meniscus lens with positive refractive power and is made of glass material. The object side S310 is concave, the image side S311 is convex, and both the object side S310 and the image side S311 are aspherical surfaces; the sixth lens L36 is a biconcave lens , the image side S315 is concave; the object side S316 and the image side S317 of the optical filter OF3 are both flat; using the above-mentioned lens, aperture ST3 and at least satisfying the design of one of the conditions (1) to (11), the wide-angle lens 3 It can effectively improve 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 in Fig. 2 .

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

Table nine is the relevant parameter value and corresponding item of the wide-angle lens 3 of the third embodiment From the calculated values of condition (1) to condition (8) and condition (10) to condition (11), it can be seen from Table 9 that the wide-angle lens 3 of the third embodiment can all satisfy condition (1) to condition (8) and condition ( 10) to the requirements of condition (11).

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. 3 that the longitudinal aberration of the wide-angle lens 3 of the third embodiment is between -0.01mm and 0.02mm. It can be seen from FIG. 4 that the field curvature of the wide-angle lens 3 of the third embodiment is between -0.08mm and 0.09mm. It can be seen from FIG. 5 that the distortion of the wide-angle lens 3 of the third embodiment is between 0% and 6%. It can be seen from FIG. 6 that the lateral chromatic aberration of the wide-angle lens 3 of the third embodiment is between -2.7 μm and 5.4 μm. It can be seen from FIG. 7 that the modulation transfer function of the wide-angle lens 3 of the third embodiment is between 0.63 and 0.94. 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 lens resolution 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. Please refer to Fig. 8, the wide-angle lens 4 includes a first lens L41, a second lens L42, a third lens L43, an aperture ST4, and a fourth lens in sequence from an object side to an image side along an optical axis OA4. A lens L44, a seventh lens L47, a fifth lens L45, a sixth lens L46 and an optical filter OF4. The first lens L41 is a focusing lens, which can move along the optical axis OA4 to change the distance between the first lens L41 and the second lens L42 to enable the wide-angle lens 4 to focus. During imaging, the light from the object side is finally imaged on an imaging surface IMA4. According to the first to thirteenth paragraphs of [implementation mode], wherein: the first lens L41 is a meniscus lens, and its image side S42 is a convex surface; the fourth lens L44 is a meniscus lens, and its object side S48 is a concave surface; the seventh lens L47 is a meniscus lens with positive refractive power, made of glass material, The object side S410 is concave, the image side S411 is convex, the object side S410 and the image side S411 are both aspheric surfaces; the sixth lens L46 is a biconcave lens, and the image side S415 is concave; the object side S416 and the object side S415 of the optical filter OF4 are The image side S417 is all flat; the wide-angle lens 4 can effectively improve the field of view, effectively reduce the aperture value, and effectively improve the resolution, effective correction of aberration, and effective correction of chromatic aberration.

Table 10 is a table of relevant parameters of each lens of the wide-angle lens 4 in Fig. 8.

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 of the fourth embodiment and the calculated values corresponding to conditions (1) to (11). As can be seen from Table 12, the wide-angle lens 4 of the fourth embodiment can all satisfy the condition (1 ) to the requirements of condition (11).

In addition, the optical performance of the wide-angle lens 4 of the fourth embodiment can also meet the requirements. It can be seen from FIG. 9 that the longitudinal aberration of the wide-angle lens 4 of the fourth embodiment is between -0.02 mm and 0.04 mm. It can be seen from FIG. 10 that the field curvature of the wide-angle lens 4 of the fourth embodiment is between -0.05mm and 0.10mm. It can be seen from Fig. 11 that the distortion of the wide-angle lens 4 of the fourth embodiment is between Between -2% and 5%. It can be seen from FIG. 12 that the lateral chromatic aberration of the wide-angle lens 4 of the fourth embodiment is between -2.1 μm and 5.1 μm. It can be seen from FIG. 13 that the modulation transfer function of the wide-angle lens 4 of the fourth embodiment is between 0.64 and 0.93. It is obvious that the longitudinal aberration, curvature of field, distortion, and lateral chromatic aberration of the wide-angle lens 4 of the fourth embodiment can be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

Although the present invention has been disclosed above with preferred embodiments, 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 present invention The scope of protection shall prevail as defined in the scope of the appended patent application.

1: wide-angle lens

L11: first lens

L12: second lens

L13: third lens

ST1: Aperture

L14: Fourth lens

L15: fifth lens

L16 sixth lens

OF1: filter

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: third lens object side

S16: The third lens image side

S17: Aperture surface

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

Claims (10)

A wide-angle lens, comprising: a first lens with negative refractive power, the first lens includes a concave surface facing toward an object side; a second lens has refractive power; a third lens has refractive power, and the third lens includes a convex surface toward the object side a fourth lens has a refractive power; a fifth lens has a refractive power; and a sixth lens has a negative refractive power, and the sixth lens includes a concave surface toward the object side; wherein the first lens, the second lens, the third The lens, the fourth lens, the fifth lens, and the sixth lens are arranged in sequence along an optical axis from the object side to an image side; wherein there are no more than seven lenses with refractive power; wherein the wide-angle lens at least satisfies the following One condition: 175mm ²

f×tan(θ)×TTL

190mm ² ; 2.5

fA/f

4; 10mm

f23

15mm; 0.09mm

｜Sinf-S3m｜

0.14mm; 8mm

f2

11mm; 7.5mm

f4

11.5mm; Wherein, f is an effective focal length of the wide-angle lens, θ is a chief ray angle of the wide-angle lens, TTL is the distance between the object side of the first lens and an imaging surface on the optical axis, and fA is the The combined effective focal length of one of the first lens, the second lens and the third lens, f23 is the combined effective focal length of one of the second lens and the third lens, and Sinf is the combined effective focal length of the first lens when the object distance is infinite. is the focusing lens, when the first lens moves to focus along the optical axis, the distance between the image side of the first lens and the object side of the second lens on the optical axis, S3m is when the object distance is 3 The distance between the image side of the first lens and the object side of the second lens on the optical axis when the first lens is used as the focusing lens and the first lens moves along the optical axis to focus , f2 is an effective focal length of the second lens, and f4 is an effective focal length of the fourth lens. The wide-angle lens as described in item 1 of the scope of the patent application, wherein the second 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, and the third lens is a meniscus lens. It has negative refractive power and further includes a concave surface facing the image side. The wide-angle lens as described in item 1 of the scope of the patent application, wherein the fifth lens is a meniscus lens with negative refractive power, and includes a concave surface facing the object side and a convex surface facing the image side. The wide-angle lens as described in item 1 of the scope of the patent application, wherein the sixth lens is a biconcave lens, and further includes a concave surface facing the image side. The wide-angle lens as described in any one of claims 1 to 4 of the scope of the patent application, wherein the first lens is a meniscus lens, and further includes a convex surface facing the image side, and the fourth lens is a meniscus lens The lens has positive refractive power and includes a concave surface facing the object side and a convex surface facing the image side. The wide-angle lens as described in any one of claims 1 to 4 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 6 of the scope of the patent application, which further includes an aperture disposed between the third lens and the fourth lens, the seventh lens is a meniscus lens with positive refractive power, and includes a concave surface facing the The object side and a convex surface face the image side. The wide-angle lens as described in any one of claims 1 to 4 of the scope of the patent application, wherein the first lens is a biconcave lens, and further includes a concave surface facing the image side, and 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 described in any one of claims 1 to 3 of the scope of the patent application further includes a diaphragm disposed between the third lens and the fourth lens, and the sixth lens further includes a convex surface facing the like side. The wide-angle lens described in any one of the claims from item 1 to item 4 of the scope of the patent application, wherein the wide-angle lens satisfies at least one of the following conditions: 1.7

L2T1/L2T2

2.7; 0.5

L3T1/L3T2

1;-2.5

f1/f

-1.5; 2

Vd2/Vd3

3; 2

Vd4/Vd5

3; where, L2T1 is the distance between the object side of the second lens and the image side of the second lens on the optical axis, L2T2 is the edge thickness of the second lens, L3T1 is the distance between the third lens An object side to the distance between an image side of the third lens on the optical axis, L3T2 is an edge thickness of the third lens, f1 is an effective focal length of the first lens, and f is the effective focal length of the wide-angle lens Focal length, Vd2 is the Abbe coefficient of the second lens, Vd3 is the Abbe coefficient of the third lens, Vd4 is the Abbe coefficient of the fourth lens, and Vd5 is the Abbe coefficient of the fifth lens.

Images