TWI844965B - 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 a biconcave lens with negative refractive power and includes a concave surface facing an object side and another concave surface facing an image side. The second lens is with refractive power and includes a convex surface facing the object side. The third lens is with refractive power. The fourth lens is with refractive power. The fifth lens is with negative refractive power and includes a concave surface facing the object side. The sixth lens is with positive refractive power and includes a convex 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 the image side along an optical axis.

Description

Wide-angle lens (42)

The present invention relates to a wide-angle lens.

The current development trend of wide-angle lenses is not only to develop towards a larger field of view, but also to have the characteristics of large aperture and high resolution in accordance with different application requirements. The conventional wide-angle lenses can no longer meet the current needs. A new wide-angle lens structure is needed to 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 larger field of view, a smaller aperture value, and a higher resolution, but still with good optical performance.

The present 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 is a biconcave lens having negative refractive power, and including a concave surface facing an object side and another concave surface facing an image side, the second lens having refractive power, and including a convex surface facing the object side, the third lens having refractive power, the fourth lens having refractive power, the fifth lens having negative refractive power, and including a concave surface facing the object side, and the sixth lens having positive refractive power, and including a convex 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 sequence along an optical axis from the object side to the image side. When the wide-angle lens of the present invention meets the above characteristics and does not require other additional characteristics or conditions, the basic function of the wide-angle lens of the present invention can be achieved.

The second lens has positive refractive power.

The second lens is a biconvex lens and may further include another convex surface facing the image side.

The third lens has positive refractive power.

The third lens is a meniscus lens and includes a concave surface facing the object side and a convex surface facing the image side.

The fourth lens has positive refractive power.

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

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

The wide-angle lens of the present invention may further include an aperture disposed between the first lens and the second lens.

(R41-R11)/CT5

53；62

(Nd3/d34)×f6

103；3

R62/R22

13；12mm

(R42)²/f2

21mm；3mm

(R11×CT1)/f5

18mm；10mm

((R52)²+(f1)²)/f4

26mm；19

(R21/R61)×(R62/R22)

93；24

CT2/d34

34；-122mm

(R31/d56)×d45

-46mm；7.5

(R31/R22)-f1

15.5；其中，R11為該第一透鏡之一物側面之一曲率半徑，R21為該第二透鏡之一物側面之一曲率半徑，R22為該第二透鏡之一像側面之一曲率半徑，R31為該第三透鏡之一物側面之一曲率半徑，R41為該第四透鏡之一物側面之一曲率半徑，R42為該第四透鏡之一 像側面之一曲率半徑，R52為該第五透鏡之一像側面之一曲率半徑，R61為該第六透鏡之一物側面之一曲率半徑，R62為該第六透鏡之一像側面之一曲率半徑，CT1為該第一透鏡之一物側面至該第一透鏡之一像側面於該光軸上之一間距，CT2為該第二透鏡之一物側面至該第二透鏡之一像側面於該光軸上之一間距，CT5為該第五透鏡之一物側面至該第五透鏡之一像側面於該光軸上之一間距，d34為該第三透鏡之一像側面至該第四透鏡之一物側面於該光軸上之一間距，d45為該第四透鏡之一像側面至該第五透鏡之一物側面於該光軸上之一間距，d56為該第五透鏡之一像側面至該第六透鏡之一物側面於該光軸上之一間距，f1為該第一透鏡之一有效焦距，f2為該第二透鏡之一有效焦距，f4為該第四透鏡之一有效焦距，f5為該第五透鏡之一有效焦距，f6為該第六透鏡之一有效焦距，Nd3為該第三透鏡之一折射率。 The wide-angle lens meets at least one of the following conditions: 10

(R41-R11)/CT5

53;62

(Nd3/d34)×f6

103;3

R62/R22

13; 12mm

(R42) ² /f2

21mm; 3mm

(R11×CT1)/f5

18mm; 10mm

((R52) ² +(f1) ² )/f4

26mm; 19

(R21/R61)×(R62/R22)

93;24

CT2/d34

34;-122mm

(R31/d56)×d45

-46mm; 7.5

(R31/R22)-f1

15.5; wherein R11 is a radius of curvature of an object side surface of the first lens, R21 is a radius of curvature of an object side surface of the second lens, R22 is a radius of curvature of an image side surface of the second lens, R31 is a radius of curvature of an object side surface of the third lens, R41 is a radius of curvature of an object side surface of the fourth lens, and R42 is a radius of curvature of an image side surface of the fourth lens. R52 is a curvature radius of the image side surface of the fifth lens, R61 is a curvature radius of the object side surface of the sixth lens, R62 is a curvature radius of the image side surface of the sixth lens, CT1 is a distance from an object side surface of the first lens to an image side surface of the first lens on the optical axis, CT2 is a distance from an object side surface of the second lens to the is a distance between an image side of the second lens on the optical axis, CT5 is a distance between an object side of the fifth lens and an image side of the fifth lens on the optical axis, d34 is a distance between an image side of the third lens and an object side of the fourth lens on the optical axis, d45 is a distance between an image side of the fourth lens and an object side of the fifth lens on the optical axis, d56 is a distance from an image side of the fifth lens to an object side of the sixth lens on the optical axis, f1 is an effective focal length of the first lens, f2 is an effective focal length of the second lens, f4 is an effective focal length of the fourth lens, f5 is an effective focal length of the fifth lens, f6 is an effective focal length of the sixth lens, and Nd3 is a refractive index of the third lens.

In order to make the above-mentioned purposes, features, and advantages of the present invention more clearly understood, the following specifically cites preferred embodiments and provides detailed descriptions with the accompanying drawings.

1, 2, 3: Wide-angle lens

L11, L21, L31: First lens

ST1, ST2, ST3: Aperture

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

OF1, OF2, OF3: Filters

CG1, CG2, CG3: Protective glass

IMA1, IMA2, IMA3: Imaging surface

OA1, OA2, OA3: optical axis

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

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

S13, S23, S33: aperture surface

S14, S24, S34: Second lens object side

S15, S25, S35: Second lens image side

S16, S26, S36: Third lens object side

S17, S27, S37: Third lens image side

S18, S28, S38: fourth lens object side

S19, S29, S39: Fourth lens image side

S110, S210, S310: Fifth lens object side

S111, S211, S311: Fifth lens image side

S112, S212, S312: sixth lens object side

S113, S213, S313: Sixth lens image side

S114, S214, S314: Object side of filter

S115, S215, S315: filter image side

S116, S216, S316: Protect the side of the glass

S117, S217, S317: Protective glass image side

Figure 1 is a schematic diagram of the lens configuration and optical path of the first embodiment of the wide-angle lens of the present invention.

Figures 2, 3, 4, and 5 are respectively the longitudinal aberration diagram, field curvature diagram, distortion diagram, and relative illumination diagram of the first embodiment of the wide-angle lens of the present invention.

Figure 6 is a schematic diagram of the lens configuration and optical path of the second embodiment of the wide-angle lens of the present invention.

Figures 7, 8, 9, and 10 are longitudinal aberration diagrams, field curvature diagrams, distortion diagrams, and relative illumination diagrams of the second embodiment of the wide-angle lens of the present invention.

Figure 11 is a schematic diagram of the lens configuration and optical path of the third embodiment of the wide-angle lens of the present invention.

Figures 12, 13, 14, and 15 are longitudinal aberration diagrams, field curvature diagrams, distortion diagrams, and relative illumination diagrams of the third embodiment of the wide-angle lens of the present invention.

The present invention provides a wide-angle lens, comprising: a first lens having negative refractive power, the first lens being a biconcave lens and including a concave surface facing an object side and another concave surface facing an image side; a second lens having refractive power, the second lens including a convex surface facing the object side; a third lens having refractive power; a fourth lens having refractive power; a fifth lens having negative refractive power, the fifth lens including a concave surface facing the object side; and a sixth lens having positive refractive power, the sixth lens including a convex 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 from the object side to the image side along an optical axis. When the wide-angle lens of the present invention meets the above characteristics, it is a preferred embodiment of the present invention.

Please refer to Table 1, Table 2, Table 4, Table 5, Table 7 and Table 8 below, wherein Table 1, Table 4 and Table 7 are respectively tables of relevant parameters of each lens of the first embodiment to the third embodiment of the wide-angle lens according to the present invention, and Table 2, Table 5 and Table 8 are respectively tables of relevant parameters of the aspherical surface of the aspherical lens in Table 1, Table 4 and Table 7. In the following embodiments, the aspheric surface concavity 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 , wherein: 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~D are the aspheric coefficients, and the aspheric coefficients are expressed in scientific symbols, for example, 2E-03 represents 2×10 ³ .

Figures 1, 6, and 11 are respectively schematic diagrams of the lens configuration and optical path of the first, second, and third embodiments of the wide-angle lens of the present invention. The first lens L11, L21, and L31 are biconcave lenses with negative refractive power, made of glass material, and their object side surfaces S11, S21, and S31 are concave surfaces, and the image side surfaces S12, S22, and S32 are concave surfaces. The object side surfaces S11, S21, and S31 and the image side surfaces S12, S22, and S32 are all spherical surfaces.

The second lens L12, L22, and L32 are biconvex lenses with positive refractive power, made of glass, and their object side surfaces S14, S24, and S34 are convex, and their image side surfaces S15, S25, and S35 are convex. The object side surfaces S14, S24, and S34 and the image side surfaces S15, S25, and S35 are all aspherical surfaces.

The third lens L13, L23, and L33 are meniscus lenses with positive refractive power, made of glass, and their object side surfaces S16, S26, and S36 are concave, and their image side surfaces S17, S27, and S37 are convex. The image side surfaces S17, S27, and S37 are aspherical surfaces.

The fourth lens L14, L24, and L34 are biconvex lenses with positive refractive power, made of glass, and their object side surfaces S18, S28, and S38 are convex surfaces, and their image side surfaces S19, S29, and S39 are convex surfaces. The object side surfaces S18, S28, and S38 and the image side surfaces S19, S29, and S39 are all spherical surfaces.

The fifth lens L15, L25, and L35 are biconcave lenses with negative refractive power, and are made of glass. The object side surfaces S110, S210, and S310 are concave surfaces, and the image side surfaces S111, S211, and S311 are concave surfaces. The object side surfaces S110, S210, and S310 and the image side surfaces S111, S211, and S311 are all spherical surfaces.

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

In addition, wide-angle lenses 1, 2, and 3 satisfy at least one of the following conditions (1) to (10):

Wherein, R11 is a curvature radius of an object side surface S11, S21, S31 of the first lens L11, L21, L31 in the first to third embodiments, R21 is a curvature radius of an object side surface S14, S24, S34 of the second lens L12, L22, L32 in the first to third embodiments, R22 is a curvature radius of an image side surface S15, S25, S35 of the second lens L12, L22, L32 in the first to third embodiments, R 31 is a curvature radius of an object side surface S16, S26, S36 of the third lens L13, L23, L33 in the first to third embodiments, R41 is a curvature radius of an object side surface S18, S28, S38 of the fourth lens L14, L24, L34 in the first to third embodiments, R42 is a curvature radius of an image side surface S19, S29, S39 of the fourth lens L14, L24, L34 in the first to third embodiments, R52 is a curvature radius of an image side surface S19, S29, S39 of the fourth lens L14, L24, L34 in the first to third embodiments, In the first to third embodiments, the fifth lens L15, L25, L35 has an image side surface S111, S211, S311 of a curvature radius, R61 is a curvature radius of an object side surface S112, S212, S312 of a sixth lens L16, L26, L36 in the first to third embodiments, and R62 is a curvature radius of an image side surface S113, S213, S313 of a sixth lens L16, L26, L36 in the first to third embodiments. CT1 is a distance between an object side surface S11, S21, S31 of the first lens L11, L21, L31 and an image side surface S12, S22, S32 of the first lens L11, L21, L31 on the optical axis OA1, OA2, OA3 in the first to third embodiments, and CT2 is a distance between an object side surface S14, S24, S34 of the second lens L12, L22, L32 and an image side surface S12, S22, S32 of the second lens L12, L22, L32 in the first to third embodiments. The distance between the surfaces S15, S25, S35 on the optical axes OA1, OA2, OA3, CT5 is the distance between the object side surface S110, S210, S310 of the fifth lens L15, L25, L35 and the image side surface S111, S211, S311 of the fifth lens L15, L25, L35 on the optical axes OA1, OA2, OA3 in the first to third embodiments, and Nd3 is the distance between the image side surface S111, S211, S311 of the third lens L13, L23, L35 in the first to third embodiments. 3, d34 is a distance between an image side surface S17, S27, S37 of the third lens L13, L23, L33 and an object side surface S18, S28, S38 of the fourth lens L14, L24, L34 on the optical axis OA1, OA2, OA3 in the first to third embodiments, d45 is a distance between an image side surface S19, S29, S39 of the fourth lens L14, L24, L34 and an object side surface S18, S28, S38 of the fifth lens L15, L25, L34 in the first to third embodiments. 35 is a distance between an object side surface S110, S210, S310 on the optical axis OA1, OA2, OA3, d56 is a distance between an image side surface S111, S211, S311 of the fifth lens L15, L25, L35 and an object side surface S112, S212, S312 of the sixth lens L16, L26, L36 on the optical axis OA1, OA2, OA3 in the first to third embodiments, and f1 is a distance between an image side surface S111, S211, S311 of the fifth lens L15, L25, L35 and an object side surface S112, S212, S312 of the sixth lens L16, L26, L36 on the optical axis OA1, OA2, OA3 in the first to third embodiments. 1, L21, L31 are effective focal lengths, f2 is an effective focal length of the second lens L12, L22, L32 in the first to third embodiments, f4 is an effective focal length of the fourth lens L14, L24, L34 in the first to third embodiments, f5 is an effective focal length of the fifth lens L15, L25, L35 in the first to third embodiments, and f6 is an effective focal length of the sixth lens L16, L26, L36 in the first to third embodiments. The wide-angle lenses 1, 2, and 3 can effectively improve the field of view, effectively improve the resolution, effectively correct the aberration, and effectively correct the chromatic aberration.

(R41-R11)/CT5

53時，可有效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。當滿足條件(2)：62

(Nd3/d34)×f6

103時，可有效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。當滿足條件(3)：3

R62/R22

13時，可有效控制廣角鏡頭厚度及焦距，以修正離軸像差。當滿足條件(4)：12mm

(R42)²/f2

21mm時，可有效控制廣角鏡頭厚度及焦距，以修正離軸像差。當滿足條件(5)：3mm

(R11×CT1)/f5

18mm時，可有效控制廣角鏡頭厚度及焦距，以修正離軸像差。當滿足條件(6)：10mm

((R52)²+(f1)²)/f4

26mm時，可有效修正像差、提升解析度。當滿足條件(7)：19

(R21/R61)×(R62/R22)

93時，可有效修正像差、提升解析度。當滿足條件(8)：24

CT2/d34

34時，可有效修正像差、提升解析度。當滿足條件(9)：-122mm

(R31/d56)×d34

-46mm時，可有效修正像差、提升解析度。當滿足條件(10)：7.5

(R31/R22)-f1

15.5時，可有效修正像差、提升解析度。 When condition (1) is met: 10

(R41-R11)/CT5

53, it can effectively provide a wide-angle lens with sufficient refractive power to control the field of view and help correct aberrations. When condition (2) is met: 62

(Nd3/d34)×f6

103, it can effectively provide a wide-angle lens with sufficient refractive power to control the field of view and help correct aberrations. When condition (3) is met: 3

R62/R22

13:00, the thickness and focal length of the wide-angle lens can be effectively controlled to correct off-axis aberrations. When condition (4) is met: 12mm

(R42) ² /f2

21mm, the thickness and focal length of the wide-angle lens can be effectively controlled to correct off-axis aberrations. When condition (5) is met: 3mm

(R11×CT1)/f5

At 18mm, the thickness and focal length of the wide-angle lens can be effectively controlled to correct off-axis aberrations. When condition (6) is met: 10mm

((R52) ² +(f1) ² )/f4

26mm, it can effectively correct aberration and improve resolution. When condition (7) is met: 19

(R21/R61)×(R62/R22)

93, it can effectively correct aberration and improve resolution. When condition (8) is met: 24

CT2/d34

34, it can effectively correct aberration and improve resolution. When the condition (9) is met: -122mm

(R31/d56)×d34

-46mm, it can effectively correct aberration and improve resolution. When the condition (10) is met: 7.5

(R31/R22)-f1

At 15.5, aberration can be effectively corrected and resolution can be improved.

The first embodiment of the wide-angle lens of the present invention is described in detail. The wide-angle lens 1 includes a first lens L11, an aperture ST1, a second lens L12, a third lens L13, a fourth lens L14, a fifth lens L15, a sixth lens L16, a filter OF1 and a protective glass CG1 along an optical axis OA1 from an object side to an image side. When imaging, the light from the object side is finally imaged on an imaging surface IMA1. According to the first to eighth paragraphs of [Implementation Method], the object side surface S16 of the third lens L13 is an aspherical surface; the image side surface S113 of the sixth lens L16 is an aspherical surface; the object side surface S114 and the image side surface S115 of the filter OF1 are both planes; the object side surface S116 and the image side surface S117 of the protective glass CG1 are both planes; by 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 improve the resolution, effectively correct the aberration, and effectively correct the chromatic aberration.

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

Table 2 is a table of relevant parameters of the aspherical surface of the aspherical lens 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 requirements of conditions (1) to (10).

In addition, the optical performance of the wide-angle lens 1 of the first embodiment can also meet the requirements. As can be seen from Figure 2, the longitudinal aberration of the wide-angle lens 1 of the first embodiment is between -0.016mm and 0.001mm. As can be seen from Figure 3, the field curvature of the wide-angle lens 1 of the first embodiment is between -0.04mm and 0.02mm. As can be seen from Figure 4, the distortion of the wide-angle lens 1 of the first embodiment is between -60% and 0%. As can be seen from Figure 5, the relative illumination of the wide-angle lens 1 of the first embodiment is between 0.6 and 1.0. It is obvious that the longitudinal aberration, field curvature, and distortion of the wide-angle lens 1 of the first embodiment can be effectively corrected, and the relative illumination of the lens can also meet the requirements, thereby obtaining better optical performance.

The second embodiment of the wide-angle lens of the present invention is described in detail. The wide-angle lens 2 includes a first lens L21, an aperture ST2, a second lens L22, a third lens L23, a fourth lens L24, a fifth lens L25, a sixth lens L26, a filter OF2 and a protective glass CG2 along an optical axis OA2 from an object side to an image side. When imaging, the light from the object side is finally imaged on an imaging surface IMA2. According to the first to eighth paragraphs of [Implementation Method], the object side surface S26 of the third lens L23 is an aspherical surface; the image side surface S213 of the sixth lens L26 is a spherical surface; the object side surface S214 and the image side surface S215 of the filter OF2 are both planes; the object side surface S216 and the image side surface S217 of the protective glass CG2 are both planes; by using the above-mentioned lens, aperture ST2 and the design that satisfies at least one of the conditions (1) to (10), the wide-angle lens 2 can effectively improve the field of view, effectively improve 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 in Figure 6.

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 requirements of conditions (1) to (10).

In addition, the optical performance of the wide-angle lens 2 of the second embodiment can also meet the requirements. As can be seen from Figure 7, the longitudinal aberration of the wide-angle lens 2 of the second embodiment is between -0.05mm and 0mm. As can be seen from Figure 8, the field curvature of the wide-angle lens 2 of the second embodiment is between -0.03mm and 0.02mm. As can be seen from Figure 9, the distortion of the wide-angle lens 2 of the second embodiment is between -60% and 0%. As can be seen from Figure 10, the relative illumination of the wide-angle lens 2 of the second embodiment is between 0.52 and 1.0. It is obvious that the longitudinal aberration, field curvature, and distortion of the wide-angle lens 2 of the second embodiment can be effectively corrected, and the relative illumination of the lens can also meet the requirements, thereby obtaining better optical performance.

The third embodiment of the wide-angle lens of the present invention is described in detail. The wide-angle lens 3 includes a first lens L31, an aperture ST3, a second lens L32, a third lens L33, a fourth lens L34, a fifth lens L35, a sixth lens L36, a filter OF3 and a protective glass CG3 along an optical axis OA3 from an object side to an image side. When imaging, the light from the object side is finally imaged on an imaging surface IMA3. According to the first to eighth paragraphs of [Implementation Method], among them: The object side surface S36 of the third lens L33 is a spherical surface; the image side surface S313 of the sixth lens L36 is a spherical surface; the object side surface S314 and the image side surface S315 of the filter OF3 are both planes; the object side surface S316 and the image side surface S317 of the protective glass CG3 are both planes; by using the above-mentioned lens, aperture ST3 and the design that satisfies at least one of the conditions (1) to (10), the wide-angle lens 3 can effectively improve the field of view, effectively improve the resolution, effectively correct the aberration, and effectively correct the chromatic aberration.

Table 7 is a table of relevant parameters of each lens of the wide-angle lens 3 in Figure 11.

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 requirements of conditions (1) to (10).

In addition, the optical performance of the wide-angle lens 3 of the third embodiment can also meet the requirements. As can be seen from Figure 12, the longitudinal aberration of the wide-angle lens 3 of the third embodiment is between -0.016mm and 0.001mm. As can be seen from Figure 13, the field curvature of the wide-angle lens 3 of the third embodiment is between -0.5mm and 0.1mm. As can be seen from Figure 14, the distortion of the wide-angle lens 3 of the third embodiment is between -60% and 0%. As can be seen from Figure 15, the relative illumination of the wide-angle lens 3 of the third embodiment is between 0.53 and 1.0. It is obvious that the longitudinal aberration, field curvature, and distortion of the wide-angle lens 3 of the third embodiment can be effectively corrected, and the relative illumination of the lens can also meet the requirements, thereby obtaining better optical performance.

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

1: Wide-angle lens

L11: First lens

ST1: Aperture

L12: Second lens

L13: Third lens

L14: The fourth lens

L15: Fifth lens

L16: Sixth lens

OF1: Filter

CG1: Protective glass

IMA1: Imaging surface

OA1: optical axis

S11: Object side of the first lens

S12: Side view of the first lens

S13: Aperture surface

S14: Second lens object side

S15: Second lens image side

S16: Third lens object side

S17: Third lens image side

S18: Fourth lens object side

S19: Fourth lens image side

S110: Fifth lens object side

S111: Fifth lens image side view

S112: Object side of the sixth lens

S113: Sixth lens image side

S114: Object side of filter

S115: filter image side

S116: Protect the side of the glass

S117: Protective glass image side

Claims (7)

A wide-angle lens comprises: a first lens having negative refractive power, the first lens being a biconcave lens and comprising a concave surface facing an object side and another concave surface facing an image side; a second lens having positive refractive power, the second lens being a biconvex lens and comprising a convex surface facing the object side and another convex surface facing the image side; a third lens having refractive power; a fourth lens having refractive power; a fifth lens having A negative refractive power, the fifth lens includes a concave surface facing the object side; and a sixth lens has a positive refractive power, the sixth lens includes a convex surface facing the object side; wherein an air space is included between the fourth lens and the fifth lens; wherein the first lens, the second lens, 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. A wide-angle lens as described in item 1 of the patent application, wherein the third lens has positive refractive power. A wide-angle lens comprises: a first lens having negative refractive power, the first lens being a biconcave lens and comprising a concave surface facing an object side and another concave surface facing an image side; a second lens having refractive power, the second lens comprising a convex surface facing the object side; a third lens having refractive power, the third lens being a meniscus lens and comprising a concave surface facing the object side and a convex surface facing the image side; a fourth lens having refractive power; A fifth lens has negative refractive power, the fifth lens includes a concave surface facing the object side; and A sixth lens has positive refractive power, the sixth lens includes a convex surface facing the object side; wherein an air space is included between the fourth lens and the fifth lens; wherein the first lens, the second lens, 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. A wide-angle lens comprises: a first lens having negative refractive power, the first lens being a biconcave lens and comprising a concave surface facing an object side and another concave surface facing an image side; a second lens having refractive power, the second lens comprising a convex surface facing the object side; a third lens having refractive power; a fourth lens being a biconvex lens and having positive refractive power, and comprising a convex surface facing the object side and another convex surface facing the image side; a The five lenses have negative refractive power, the fifth lens includes a concave surface facing the object side; and the sixth lens has positive refractive power, the sixth lens includes a convex surface facing the object side; wherein an air space is included between the fourth lens and the fifth lens; wherein the first lens, the second lens, 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. A wide-angle lens, comprising: a first lens having negative refractive power, the first lens being a biconcave lens and including a concave surface facing an object side and another concave surface facing an image side; a second lens having refractive power, the second lens including a convex surface facing the object side; a third lens having refractive power; a fourth lens having refractive power; a fifth lens having negative refractive power, the fifth lens being a biconcave lens and including a concave surface facing The object side and another concave surface face the image side; and a sixth lens is a biconvex lens having positive refractive power and including a convex surface facing the object side and another convex surface facing the image side; wherein an air space is included between the fourth lens and the fifth lens; wherein the first lens, the second lens, 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. A wide-angle lens comprises: a first lens having negative refractive power, the first lens being a biconcave lens and comprising a concave surface facing an object side and another concave surface facing an image side; a second lens having refractive power, the second lens comprising a convex surface facing the object side; a third lens having refractive power; a fourth lens having refractive power; a fifth lens having negative refractive power, the fifth lens comprising a concave surface facing the object side; and a sixth lens having positive refractive power, the sixth lens including a convex surface facing the object side; wherein an air space is included between the fourth lens and the fifth lens; wherein the first lens, the second lens, 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; and further including an aperture disposed between the first lens and the second lens. A wide-angle lens as claimed in any one of claims 1 to 6 of the patent application, wherein the wide-angle lens satisfies at least one of the following conditions: 10

(R41-R11)/CT5

53; 62

(Nd3/d34)×f6

103;3

R62/R22

13; 12mm

(R42) ² /f2

21mm; 3mm

(R11×CT1)/f5

18mm; 10mm

((R52) ² +(f1) ² )/f4

26mm; 19

(R21/R61)×(R62/R22)

93;24

CT2/d34

34;-122mm

(R31/d56)×d45

-46mm; 7.5

(R31/R22)-f1

15.5; wherein, R11 is a curvature radius of an object side surface of the first lens, R21 is a curvature radius of an object side surface of the second lens, R22 is a curvature radius of an image side surface of the second lens, R31 is a curvature radius of an object side surface of the third lens, R41 is a curvature radius of an object side surface of the fourth lens, R42 is a curvature radius of an image side surface of the fourth lens, R52 is a curvature radius of an image side surface of the fifth lens, R61 is a curvature radius of an object side surface of the sixth lens, R62 is a curvature radius of an image side surface of the sixth lens, CT1 is a curvature radius of an object side surface of the first lens, d1 is a distance from an image side of the third lens to an object side of the fourth lens on the optical axis, d2 is a distance from an image side of the fourth lens to an object side of the fifth lens on the optical axis, d3 is a distance from an image side of the fifth lens to an object side of the fifth lens on the optical axis, d4 is a distance from an image side of the fourth lens to an object side of the fifth lens on the optical axis, d56 is a distance from an image side of the fifth lens to an object side of the sixth lens on the optical axis, f1 is an effective focal length of the first lens, f2 is an effective focal length of the second lens, f4 is an effective focal length of the fourth lens, f5 is an effective focal length of the fifth lens, f6 is an effective focal length of the sixth lens, and Nd3 is a refractive index of the third lens.

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