TWI704372B - Wide-angle lens assembly - Google Patents

Abstract

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

Description

Wide-angle lens (21)

The invention relates to a wide-angle lens.

In recent years, day and night shared monitors have been widely used in the home environment to improve home safety. Most of these types of monitors are equipped with wide-angle lenses, which capture visible light images during the day and infrared images at night. Since visible light and infrared light have different wavelength bands, when the two pass through a conventional wide-angle lens, their back focal length (Back Focal Length) usually has a gap of more than 0.01mm. When the relative position of the lens and the image sensor is fixed, This gap of more than 0.01mm will cause the image of one of the bands to quickly deteriorate, making the conventional wide-angle lens unable to provide clear visible light images and infrared light images at the same time. Therefore, another wide-angle lens with a new architecture is needed to provide clear visible light images and infrared light images at the same time to meet today's needs.

In view of this, the main purpose of the present invention is to provide a wide-angle lens, through the special combination of plastic and glass materials, which can greatly reduce the difference in back focal length between visible light and infrared light, so that both visible light images and infrared light images have good optical performance .

The wide-angle lens of the present invention includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and One tenth lens. The first lens has negative refractive power. The second lens has negative refractive power. The third lens has negative refractive power and includes a convex surface facing an image side. The fourth lens has positive refractive The optical power includes a convex surface facing an object side. The fifth lens has positive refractive power and includes a convex surface facing the object side. The sixth lens has positive refractive power and includes a convex surface facing the object side. The seventh lens has refractive power and includes a concave surface facing the image side. The eighth lens has refractive power. The ninth lens has refractive power. The tenth lens is a meniscus lens with refractive power. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens and the tenth lens from the object side to the image side along an optical axis In order.

The first lens includes a convex surface toward the object side and a concave surface toward the image side. The second lens includes a convex surface toward the object side and a concave surface toward the image side. The third lens may further include a concave surface toward the object side. The fifth lens element may further include a convex surface toward the image side. The sixth lens element may further include a convex surface toward the image side. The seventh lens element has negative refractive power and may further include a concave surface toward the object side. It has positive refractive power and includes a convex surface toward the object side and another convex surface toward the image side. The ninth lens has positive refractive power and includes a convex surface toward the object side and another convex surface toward the image side. The tenth lens has positive refractive power and includes a convex surface toward the image side. The object side and a concave surface face the image side.

The wide-angle lens of the present invention may further include an eleventh lens disposed between the sixth lens and the seventh lens, wherein the first lens includes a convex surface facing the object side and a concave surface facing the image side, and the second lens includes a convex surface facing the object side And a concave surface facing the image side, the third lens may further include a concave surface facing the object side, the fourth lens may further include a convex surface facing the image side, the fifth lens may further include a concave surface facing the image side, the sixth lens may further include a The concave surface faces the image side, the seventh lens has negative refractive power and may further include a concave surface facing the object side. The eighth lens has positive refractive power and includes a convex surface facing the object side and another convex surface facing the image side. The ninth lens has positive refractive power and includes One convex surface faces the object side and the other convex surface faces the image side. The tenth lens has positive refractive power and includes a concave surface facing the object side and a convex Face to the image side, the eleventh lens has positive refractive power and includes a convex surface facing the object side and another convex surface facing the image side.

The eleventh lens, the seventh lens and the eighth lens are cemented.

The sixth lens and the seventh lens are cemented.

R₁₁/R₁₂

3.7；其中，R₁₁為第一透鏡之一物側面之一曲率半徑，R₁₂為第一透鏡之一像側面之一曲率半徑。 The wide-angle lens meets the following conditions: 2.7

R ₁₁ /R ₁₂

3.7; where R ₁₁ is a radius of curvature of an object side surface of the first lens, and R ₁₂ is a radius of curvature of an image side surface of the first lens.

D₁₂/R₁₂<1.81；其中，D₁₂為第一透鏡之一像側面之一光學有效直徑，R₁₂為第一透鏡之像側面之一曲率半徑。 The wide-angle lens meets the following conditions: 1.6

D ₁₂ /R ₁₂ <1.81; where D ₁₂ is an optical effective diameter of an image side surface of the first lens, and R ₁₂ is a curvature radius of an image side surface of the first lens.

R₃₁×R₃₂

108mm²；其中，R₃₁為第三透鏡之一物側面之一曲率半徑，R₃₂為第三透鏡之一像側面之一曲率半徑。 The wide-angle lens meets the following conditions: 64mm ²

R ₃₁ ×R ₃₂

108mm ² ; where R ₃₁ is a curvature radius of an object side surface of the third lens, and R ₃₂ is a curvature radius of an image side surface of the third lens.

Nd₅

2.1；其中，Nd₅為第五透鏡之一折射率。 The wide-angle lens meets the following conditions: 1.8

Nd ₅

2.1; Among them, Nd ₅ is one of the refractive index of the fifth lens.

Vd₆+Vd₇

94；其中，Vd₆為第六透鏡之一阿貝係數，Vd₇為第七透鏡之一阿貝係數。 The wide-angle lens meets the following conditions: 65

Vd ₆ +Vd ₇

94; where Vd ₆ is one of the Abbe coefficients of the sixth lens, and Vd ₇ is one of the Abbe coefficients of the seventh lens.

R₇₂-R₈₁

0.40；其中，R₇₂為第七透鏡之一像側面之一曲率半徑，R₈₁為第八透鏡之一物側面之一曲率半徑。 The wide-angle lens meets the following conditions: -0.95

R ₇₂ -R ₈₁

0.40; where R ₇₂ is a curvature radius of an image side surface of the seventh lens, and R ₈₁ is a curvature radius of an object side surface of the eighth lens.

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

1, 2, 3, 4: wide-angle lens

L11, L21, L31, L41: the first lens

L12, L22, L32, L42: second lens

L13, L23, L33, L43: third lens

L14, L24, L34, L44: fourth lens

L15, L25, L35, L45: fifth lens

L16, L26, L36, L46: sixth lens

L17, L27, L37, L47: seventh lens

L18, L28, L38, L48: eighth lens

L19, L29, L39, L49: Ninth lens

L110, L210, L310, L410: Tenth lens

L411: Eleventh lens

ST1, ST2, ST3, ST4: aperture

OF1, OF2, OF3, OF4: filter

CG1, CG2, CG3, CG4: protective glass

OA1, OA2, OA3, OA4: Optical axis

IMA1, IMA2, IMA3, IMA4: imaging surface

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 side of the second lens image

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

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

S17, S27, S37, S47: the object side of the fourth lens

S18, S28, S38, S48: Fourth lens image side

S19, S29, S39, S49: aperture surface

S110, S210, S310, S410: fifth lens object side

S111, S211, S311, S411: the side of the fifth lens image

S112, S212, S312, S412: sixth lens object side

S113, S213, S313, S413: sixth lens image side

S113, S213, S313, S415: seventh lens object side

S114, S214, S314, S416: the seventh lens image side

S115, S215, S315, S416: eighth lens object side

S116, S216, S316, S417: side view of the eighth lens

S117, S217, S317, S418: ninth lens object side

S118, S218, S318, S419: Ninth lens image side

S119, S219, S319, S420: the tenth lens object side

S120, S220, S320, S421: Tenth lens image side

S414: Object side of the eleventh lens

S415: Side view of the eleventh lens

S121, S221, S321, S422: side of the filter object

S122, S222, S322, S423: Filter image side

S123, S223, S323, S424: protect the side of the glass object

S124, S224, S324, S425: Protect the side of the glass image

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

FIG. 2A is a diagram of Longitudinal Aberration in the visible light region of the first embodiment of the wide-angle lens according to the present invention.

FIG. 2B is a field curvature diagram of the first embodiment of the wide-angle lens according to the present invention in the visible light region.

Figure 2C is a distortion diagram in the visible light region of the first embodiment of the wide-angle lens according to the present invention.

Fig. 2D is a lateral chromatic aberration (Lateral Color) diagram in the visible light region of the first embodiment of the wide-angle lens according to the present invention.

Figure 2E is a longitudinal aberration diagram in the infrared region of the first embodiment of the wide-angle lens according to the present invention.

Figure 2F is a field curvature diagram of the first embodiment of the wide-angle lens according to the present invention in the infrared region.

Figure 2G is a distortion diagram in the infrared region of the first embodiment of the wide-angle lens according to the present invention.

Figure 2H is a lateral chromatic aberration diagram in the infrared region 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 second embodiment of the wide-angle lens according to the present invention.

FIG. 4A is a longitudinal aberration diagram in the visible light region of the second embodiment of the wide-angle lens according to the present invention.

FIG. 4B is a field curve diagram of the second embodiment of the wide-angle lens according to the present invention in the visible light region.

FIG. 4C is a distortion diagram in the visible light region of the second embodiment of the wide-angle lens according to the present invention.

Fig. 4D is a lateral chromatic aberration diagram in the visible light region of the second embodiment of the wide-angle lens according to the present invention.

Figure 4E is a longitudinal aberration diagram in the infrared region of the second embodiment of the wide-angle lens according to the present invention.

Figure 4F is a field curvature diagram of the second embodiment of the wide-angle lens according to the present invention in the infrared region.

Fig. 4G is a distortion diagram in the infrared region of the second embodiment of the wide-angle lens according to the present invention.

Figure 4H is a lateral chromatic aberration diagram in the infrared region of the second embodiment of the wide-angle lens according to the present invention.

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

FIG. 6A is a longitudinal aberration diagram in the visible light region of the third embodiment of the wide-angle lens according to the present invention.

FIG. 6B is a field curvature diagram of the third embodiment of the wide-angle lens according to the present invention in the visible light region.

FIG. 6C is a distortion diagram in the visible light region of the third embodiment of the wide-angle lens according to the present invention.

Fig. 6D is a lateral chromatic aberration diagram in the visible light region of the third embodiment of the wide-angle lens according to the present invention.

Figure 6E is a longitudinal aberration diagram in the infrared region of the third embodiment of the wide-angle lens according to the present invention.

Figure 6F is a field curvature diagram of the third embodiment of the wide-angle lens according to the present invention in the infrared region.

Fig. 6G is a distortion diagram of the third embodiment of the wide-angle lens according to the present invention in the infrared region.

Figure 6H is a diagram of lateral chromatic aberration in the infrared region of the third embodiment of the wide-angle lens according to the present invention.

FIG. 7 is a schematic diagram of the lens configuration of the fourth embodiment of the wide-angle lens according to the present invention.

FIG. 8A is a longitudinal aberration diagram in the visible light region of the fourth embodiment of the wide-angle lens according to the present invention.

FIG. 8B is a field curve diagram of the fourth embodiment of the wide-angle lens according to the present invention in the visible light region.

FIG. 8C is a distortion diagram in the visible light region of the fourth embodiment of the wide-angle lens according to the present invention.

Fig. 8D is a lateral chromatic aberration diagram in the visible light region of the fourth embodiment of the wide-angle lens according to the present invention.

Fig. 8E is a longitudinal aberration diagram in the infrared region of the fourth embodiment of the wide-angle lens according to the present invention.

Figure 8F is a field curvature diagram of the fourth embodiment of the wide-angle lens according to the present invention in the infrared region.

Fig. 8G is a distortion diagram in the infrared region of the fourth embodiment of the wide-angle lens according to the present invention.

Figure 8H is a lateral chromatic aberration diagram in the infrared region of the fourth embodiment of the wide-angle lens according to the present invention.

The present invention provides a wide-angle lens, including: a first lens with negative refractive power; a second lens with negative refractive power; a third lens with negative refractive power, the third lens including a convex surface facing an image side; a fourth lens with positive Refractive power, the fourth lens includes a convex surface facing an object side; a fifth lens has positive refractive power, the fifth lens includes a convex surface facing the object side; a sixth lens has positive refractive power, the sixth lens includes a convex surface facing the object Side; a seventh lens with refractive power, the seventh lens includes a concave surface facing the image side; an eighth lens with refractive power; a ninth lens with refractive power; and a tenth lens with refractive power, the tenth lens is meniscus Lens; wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens and the tenth lens from the object side along an optical axis To like The sides are arranged in order.

Please refer to Table 1, Table 2, Table 4, Table 5, Table 7, Table 8, Table 10, and Table 11 at the bottom. Table 1, Table 4, Table 7 and Table 10 are the first of the wide-angle lens according to the present invention. The relevant parameter table of each lens of the embodiment to the fourth embodiment. Table 2, Table 5, Table 8 and Table 11 are the relevant parameters of the aspheric surface of each lens in Table 1, Table 4, Table 7 and Table 10. table.

Figures 1, 3, 5, and 7 are schematic diagrams of the lens configuration of the first, second, third, and fourth embodiments of the wide-angle lens of the present invention, respectively. The first lenses L11, L21, L31, and L41 have negative refractive power and are made of glass. , The object side surfaces S11, S21, S31, S41 and the image side surfaces S12, S22, S32, S42 are all spherical surfaces.

The second lenses L12, L22, L32, and L42 have negative refractive power and are made of plastic material. The object side surfaces S13, S23, S33, S43 and the image side surfaces S14, S24, S34, S44 are all aspherical surfaces.

The third lens L13, L23, L33, L43 has negative refractive power and is made of plastic material. Its image side surfaces S16, S26, S36, S46 are convex surfaces, and the object side surfaces S15, S25, S35, S45 and the image side surfaces S16, S26, S36, S46 are all aspherical surfaces.

The fourth lens L14, L24, L34, L44 has positive refractive power and is made of plastic material. Its object side surfaces S17, S27, S37, S47 are convex, and the object side surfaces S17, S27, S37, S47 and the image side surfaces S18, S28, S38, S48 are all aspherical surfaces.

The fifth lenses L15, L25, L35, and L45 have positive refractive power and are made of glass. The object side surfaces S110, S210, S310, S410 are convex surfaces, and the object side surfaces S110, S210, S310, S410 and the image side surfaces S111, S211, S311, S411 are all spherical surfaces.

The sixth lenses L16, L26, L36, and L46 have positive refractive power and are made of glass. The object side surfaces S112, S212, S312, and S412 are convex. The object side surfaces S112, S212, S312, S412 and the image side surfaces S113, S213, S313, S413 are all spherical surfaces.

The seventh lenses L17, L27, L37, and L47 have negative refractive power and are made of glass. The image side surfaces S114, S214, S314, S416 are concave, and the object side surfaces S113, S213, S313, S415 and the image side surfaces S114, S214, S314, S416 are all spherical surfaces.

The eighth lenses L18, L28, L38, and L48 have positive refractive power and are made of glass. The object sides S115, S215, S315, and S416 and the image sides S116, S216, S316, and S417 are all spherical surfaces.

The ninth lenses L19, L29, L39, and L49 have positive refractive power and are made of plastic materials. The object sides S117, S217, S317, S418 and the image sides S118, S218, S318, and S419 are all aspherical surfaces.

The tenth lenses L110, L210, L310, and L410 are meniscus lenses with positive refractive power and are made of plastic materials. The object sides S119, S219, S319, S420 and the image sides S120, S220, S320, and S421 are all aspherical surfaces.

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

Among them, R ₁₁ is the radius of curvature of one of the object side surfaces S11, S21, S31, S41 of the first lenses L11, L21, L31, and L41 in the first to fourth embodiments. R ₁₂ is one of the curvature radius of the image side surfaces S12, S22, S32, and S42 of the first lenses L11, L21, L31, and L41 in the first to fourth embodiments. R ₃₁ is one of the curvature radius of the object side surfaces S15, S25, S35, S45 of the third lens L13, L23, L33, and L43 in the first to fourth embodiments. R ₃₂ is one of the curvature radius of the image side surfaces S16, S26, S36, and S46 of the third lenses L13, L23, L33, and L43 in the first to fourth embodiments. R ₇₂ is one of the curvature radiuses of the image side surfaces S114, S214, S314, and S416 of the seventh lens L17, L27, L37, and L47 in the first to fourth embodiments. R ₈₁ is one of the curvature radius of the object sides S115, S215, S315, S416 of the eighth lens L18, L28, L38, and L48 in the first to fourth embodiments. D ₁₂ is one of the optical effective diameters of the image side surfaces S12, S22, S32, and S42 of the first lenses L11, L21, L31, and L41 in the first to fourth embodiments. Nd ₅ is the refractive index of one of the fifth lenses L15, L25, L35, and L45 in the first to fourth embodiments. Vd ₆ is the Abbe coefficient of one of the sixth lenses L16, L26, L36, and L46 in the first to fourth embodiments. Vd ₇ is the Abbe coefficient of one of the seventh lenses L17, L27, L37, and L47 in the first to fourth embodiments. The wide-angle lens 1, 2, 3, 4 can effectively increase the field of view, effectively reduce the aperture value, effectively improve the resolution, effectively correct aberrations, and effectively improve the quality of visible light and infrared light at the same time.

The first embodiment of the wide-angle lens of the present invention will now be described in detail. Please refer to Fig. 1, the wide-angle lens 1 includes a first lens L11, a second lens L12, a third lens L13, a fourth lens L14, and a fourth lens L11 in sequence from an object side to an image side along an optical axis OA1. Aperture ST1, a fifth lens L15, a sixth lens L16, a seventh lens L17, an eighth lens L18, a ninth lens L19, a tenth lens L110, a filter OF1 and a protective glass CG1. Sixth pass There is no air gap between the image side surface S113 of the lens L16 and the object side surface S113 of the seventh lens L17. Instead, the image side surface S113 of the sixth lens L16 and the object side surface S113 of the seventh lens L17 are cemented with each other using a cementing material. When imaging, the light from the object side is finally imaged on an imaging surface IMA1. According to the first to twelfth paragraphs of [Embodiment], wherein: the first lens L11 is a meniscus lens, the object side S11 is convex, and the image side S12 is concave; the second lens L12 is a meniscus lens with its object side S13 is a convex surface, and the image side surface S14 is a concave surface; the third lens L13 is a meniscus lens with a concave object side surface S15; the fourth lens L14 is a biconvex lens and its image side surface S18 is a convex surface; the fifth lens L15 is a biconvex lens, The image side surface S111 is convex; the sixth lens L16 is a biconvex lens, and the image side S113 is convex; the seventh lens L17 is a biconcave lens with negative refractive power, and its object side S113 is concave; the eighth lens L18 is a biconvex lens with positive refractive power , The object side surface S115 is convex, and the image side surface S116 is convex; the ninth lens L19 is a biconvex lens with positive refractive power, its object side surface S117 is convex, and the image side surface S118 is convex; the tenth lens L110 has positive refractive power, and its object side surface S119 It is a convex surface, and the image side surface S120 is a concave surface; the object side surface S121 and the image side surface S122 of the filter OF1 are both flat surfaces; the object side surface S123 and the image side surface S124 of the protective glass CG1 are both flat surfaces.

Using the above-mentioned lens, aperture ST1, and a design that meets at least one of the conditions (1) to (6), the wide-angle lens 1 can effectively increase the field of view, effectively reduce the aperture value, effectively improve the resolution, and effectively correct the image. Poor and effective while improving the quality of visible light and infrared light images.

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

The concavity Z of the aspheric surface of each lens in Table 1 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

Among them: c: curvature; h: the vertical distance from any point on the lens surface to the optical axis; k: conic coefficient; A~D: aspheric coefficient.

Table 2 is the relevant parameter table of the aspheric surface of each lens in Table 1, where k is the Conic Constant and A~D are the aspheric coefficients.

Table 3 shows the relevant parameter values of the wide-angle lens 1 of the first embodiment and the calculated values of corresponding conditions (1) to (6). From Table 3, it can be seen that the wide-angle lens 1 of the first embodiment can all satisfy the conditions (1) to The requirements of condition (6).

It can be seen from FIG. 2A that the wide-angle lens 1 of the first embodiment has a longitudinal aberration in the visible light region between -0.01 mm and 0.04 mm.

It can be seen from FIG. 2B that the wide-angle lens 1 of the first embodiment has a field curvature of -0.03mm to 0.04mm in the visible light region.

It can be seen from Figure 2C that the distortion of the wide-angle lens 1 of the first embodiment in the visible light region is between -3.5% and 0%.

It can be seen from Fig. 2D that the lateral chromatic aberration of the wide-angle lens 1 of the first embodiment in the visible light region is between -3.6 μm and 19.8 μm.

It can be seen from FIG. 2E that the wide-angle lens 1 of the first embodiment has a longitudinal aberration in the infrared region between -0.01 mm and 0.01 mm.

It can be seen from Fig. 2F that the field curvature of the wide-angle lens 1 of the first embodiment in the infrared region is between -0.03mm and 0.03mm.

It can be seen from Figure 2G that the distortion of the wide-angle lens 1 of the first embodiment in the infrared region is between -3.5% and 0%.

It can be seen from Figure 2H that the wide-angle lens 1 of the first embodiment has a lateral chromatic aberration in the infrared region between -1.8 μm and 3.6 μm.

It is obvious that the longitudinal aberration, curvature of field, distortion, and lateral chromatic aberration of the wide-angle lens 1 of the first embodiment in the visible light region and the infrared light region can be effectively corrected, thereby obtaining better optical performance.

Please refer to FIG. 3, which is a schematic diagram of the lens configuration of the second embodiment of the wide-angle lens according to the present invention. The wide-angle lens 2 includes a first lens L21, a second lens L22, a third lens L23, a fourth lens L24, an aperture ST2, and a fifth lens in order from an object side to an image side along an optical axis OA2. Lens L25, a sixth lens L26, a seventh lens L27, an eighth lens L28, a ninth lens L29, a tenth lens L210, a filter OF2 and a protective glass CG2. There is no air gap between the image side surface S213 of the sixth lens L26 and the object side surface S213 of the seventh lens L27, but the image side surface S213 of the sixth lens L26 and the object side surface S213 of the seventh lens L27 are cemented with each other using a cementing material. When imaging, the light from the object side is finally imaged on an imaging surface IMA2. According to [Implementation Mode] paragraphs 1 to 12, in which: One of first lens L21, second lens L22, third lens L23, fourth lens L24, fifth lens L25, sixth lens L26, seventh lens L27, eighth lens L28, ninth lens L29, and tenth lens L210 The uneven surface shape is the same as the first lens L11, second lens L12, third lens L13, fourth lens L14, fifth lens L15, sixth lens L16, seventh lens L17, and eighth lens L18 in the first embodiment. , The ninth lens L19 and the tenth lens L110 are similar and will not be repeated here; The object side surface S221 and the image side surface S222 of the filter OF2 are both flat surfaces; the object side surface S223 and the image side surface S224 of the protective glass CG2 are both flat surfaces.

Using the above-mentioned lens, aperture ST2, and a design that meets at least one of the conditions (1) to (6), the wide-angle lens 2 can effectively increase the field of view, effectively reduce the aperture value, effectively improve the resolution, and effectively correct the image. Poor and effective while improving the quality of visible light and infrared light images.

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

The definition of the aspheric surface concavity z of each lens in Table 4 is the same as the definition of the aspheric surface concavity z of each lens in Table 1 in the first embodiment, and will not be repeated here.

Table 5 is a table of related parameters of the aspheric surface of each lens in Table 4, where k is the Conic Constant, and A~D are the aspheric coefficients.

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 (6). From Table 6, it can be seen that the wide-angle lens 2 of the second embodiment can all satisfy the conditions (1) to The requirements of condition (6).

It can be seen from Fig. 4A that the wide-angle lens 2 of the second embodiment has a longitudinal aberration in the visible light region between -0.02mm and 0.04mm.

It can be seen from FIG. 4B that the wide-angle lens 2 of the second embodiment has a field curvature of -0.03mm to 0.03mm in the visible light region.

It can be seen from FIG. 4C that the distortion of the wide-angle lens 2 of the second embodiment in the visible light region is between 0% and 4.5%.

It can be seen from Fig. 4D that the wide-angle lens 2 of the second embodiment has a lateral chromatic aberration in the visible light region between -3.6 μm and 21.6 μm.

It can be seen from Fig. 4E that the wide-angle lens 2 of the second embodiment has a longitudinal aberration in the infrared region between -0.01mm and 0.01mm.

It can be seen from Figure 4F that the wide-angle lens 2 of the second embodiment is in the infrared region, Its field curvature is between -0.01mm and 0.07mm.

It can be seen from Fig. 4G that the distortion of the wide-angle lens 2 of the second embodiment in the infrared region is between 0% and 5%.

It can be seen from FIG. 4H that the wide-angle lens 2 of the second embodiment has a lateral chromatic aberration in the infrared region between -1.8 μm and 3.6 μm.

It is obvious that the longitudinal aberration, curvature of field, distortion, and lateral chromatic aberration of the wide-angle lens 2 of the second embodiment in the visible light region and the infrared light region can be effectively corrected, thereby obtaining better optical performance.

Please refer to FIG. 5, which is a schematic diagram of the lens configuration of the third embodiment of the wide-angle lens according to the present invention. The wide-angle lens 3 includes a first lens L31, a second lens L32, a third lens L33, a fourth lens L34, an aperture ST3, and a fifth lens in order from an object side to an image side along an optical axis OA3. Lens L35, a sixth lens L36, a seventh lens L37, an eighth lens L38, a ninth lens L39, a tenth lens L310, a filter OF3 and a protective glass CG3. There is no air gap between the image side surface S313 of the sixth lens L36 and the object side surface S313 of the seventh lens L37, but the image side surface S313 of the sixth lens L36 and the object side surface S313 of the seventh lens L37 are cemented with each other by a cementing material. When imaging, the light from the object side is finally imaged on an imaging surface IMA3. According to [Embodiment] paragraphs 1 to 12, wherein: the first lens L31, the second lens L32, the third lens L33, the fourth lens L34, the fifth lens L35, the sixth lens L36, the seventh lens L37, and the The surface shapes of the eight lens L38, the ninth lens L39, and the tenth lens L310 are respectively the same as those of the first lens L11, the second lens L12, the third lens L13, the fourth lens L14, the fifth lens L15, and the first lens in the first embodiment. The sixth lens L16, the seventh lens L17, the eighth lens L18, the ninth lens L19, and the tenth lens L110 are similar. To repeat; the object side surface S321 and the image side surface S322 of the filter OF3 are both flat surfaces; the object side surface S323 and the image side surface S324 of the protective glass CG3 are both flat surfaces.

Using the above-mentioned lens, aperture ST3, and a design that meets at least one of the conditions (1) to (6), the wide-angle lens 3 can effectively increase the field of view, effectively reduce the aperture value, effectively improve the resolution, and effectively correct the image. Poor and effective while improving the quality of visible light and infrared light images.

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

The definition of the aspheric surface concavity z of each lens in Table 7 is the same as the definition of the aspheric surface concavity z of each lens in Table 1 in the first embodiment, and will not be repeated here.

Table 8 is a table of related parameters of the aspheric surface of each lens in Table 7, where k is the Conic Constant and A~D are the aspheric coefficients.

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 (6). From Table 9, it can be seen that the wide-angle lens 3 of the third embodiment can all satisfy the conditions (1) to The requirements of condition (6).

It can be seen from FIG. 6A that the wide-angle lens 3 of the third embodiment has a longitudinal aberration in the visible light region between -0.01 mm and 0.03 mm.

It can be seen from FIG. 6B that the wide-angle lens 3 of the third embodiment has a field curvature of -0.03mm to 0.04mm in the visible light region.

It can be seen from FIG. 6C that the distortion of the wide-angle lens 3 of the third embodiment in the visible light region is between -7% and 0%.

It can be seen from FIG. 6D that the wide-angle lens 3 of the third embodiment has a lateral chromatic aberration in the visible light region between -1.8 μm and 16.2 μm.

It can be seen from Fig. 6E that the wide-angle lens 3 of the third embodiment has a longitudinal aberration in the infrared region between -0.01mm and 0.02mm.

It can be seen from Fig. 6F that the field curvature of the wide-angle lens 3 of the third embodiment in the infrared region is between -0.03mm and 0.02mm.

It can be seen from Fig. 6G that the distortion of the wide-angle lens 3 of the third embodiment in the infrared region is between -7% and 0%.

It can be seen from Fig. 6H that the wide-angle lens 3 of the third embodiment has a lateral chromatic aberration in the infrared region between -1.8 μm and 3.6 μm.

It is obvious that the longitudinal aberration, curvature of field, distortion, and lateral chromatic aberration of the wide-angle lens 3 of the third embodiment in the visible light region and the infrared light region can be effectively corrected, thereby obtaining better optical performance.

Please refer to Figure 7. Figure 7 is the fourth example of the wide-angle lens according to the present invention. Schematic diagram of the lens configuration of the embodiment. The wide-angle lens 4 includes a first lens L41, a second lens L42, a third lens L43, a fourth lens L44, an aperture ST4, and a fifth lens in order from an object side to an image side along an optical axis OA4. Lens L45, a sixth lens L46, an eleventh lens L411, a seventh lens L47, an eighth lens L48, a ninth lens L49, a tenth lens L410, a filter OF4, and a protective glass CG4 . There is no air gap between the image side surface S415 of the eleventh lens L411 and the object side surface S415 of the seventh lens L47. Instead, the image side surface S415 of the eleventh lens L411 and the object side surface S415 of the seventh lens L47 are connected to each other by a cemented material. Cementing, there is no air gap between the image side surface S416 of the seventh lens L47 and the object side surface S416 of the eighth lens L48. Instead, the image side surface S416 of the seventh lens L47 and the object side surface S416 of the eighth lens L48 are connected to each other by cementing material. glued. When imaging, the light from the object side is finally imaged on an imaging surface IMA4. According to [Embodiment] Paragraphs 1 to 12, wherein: the fifth lens L45 is a meniscus lens with a concave image side surface S411; the sixth lens L46 is a meniscus lens with a concave image side surface S413; The object side S420 of the lens L410 is concave, and the image side S421 is convex; the eleventh lens L411 is a biconvex lens with positive refractive power, the object side S414 is convex, the image side S415 is convex, the object side S414 and the image side S415 are both spherical Surface; the surface shape of the first lens L41, the second lens L42, the third lens L43, the fourth lens L44, the seventh lens L37, the eighth lens L38, and the ninth lens L39 are respectively the same as those of the first embodiment The lens L11, the second lens L12, the third lens L13, the fourth lens L14, the seventh lens L17, the eighth lens L18, and the ninth lens L19 are similar and will not be repeated here; the filter OF4 has its object side S422 and The image side S423 is flat; The object side S424 and the image side S425 of the protective glass CG4 are both flat.

Using the above-mentioned lens, aperture ST4, and a design that meets at least one of the conditions (1) to (6), the wide-angle lens 4 can effectively increase the field of view, effectively reduce the aperture value, effectively increase the resolution, and effectively correct the image. Poor and effective while improving the quality of visible light and infrared light images.

Table 10 is a table of related parameters of each lens of the wide-angle lens 4 in Figure 7.

The definition of the aspheric surface concavity z of each lens in Table 10 is the same as the definition of the aspheric surface concavity z of each lens in Table 1 of the first embodiment, and will not be repeated here.

Table 11 is a table of related parameters of the aspheric surface of each lens in Table 10, where k is the Conic Constant and A~D are the aspheric coefficients.

Table 12 shows the relevant parameter values of the wide-angle lens 4 of the fourth embodiment and the calculated values of the corresponding conditions (1) to (6). From Table 12, it can be seen that the wide-angle lens 4 of the fourth embodiment can all satisfy the condition (1). ) To the requirements of condition (6).

It can be seen from FIG. 8A that the longitudinal aberration of the wide-angle lens 4 of the fourth embodiment in the visible light region is between -0.01 mm and 0.06 mm.

It can be seen from FIG. 8B that the field curvature of the wide-angle lens 4 of the fourth embodiment in the visible light region is between -0.01mm and 0.07mm.

It can be seen from FIG. 8C that the distortion of the wide-angle lens 4 of the fourth embodiment in the visible light region is between -4.2% and 0.7%.

It can be seen from FIG. 8D that the wide-angle lens 4 of the fourth embodiment has a lateral chromatic aberration in the visible light region between -1.8 μm and 21.6 μm.

It can be seen from FIG. 8E that the wide-angle lens 4 of the fourth embodiment has a longitudinal aberration of 0 mm to 0.02 mm in the infrared region.

It can be seen from Fig. 8F that the field curvature of the wide-angle lens 4 of the fourth embodiment in the infrared region is between -0.01mm and 0.02mm.

It can be seen from Fig. 8G that the distortion of the wide-angle lens 4 of the fourth embodiment in the infrared region is between -4.2% and 0.7%.

It can be seen from FIG. 8H that the wide-angle lens 4 of the fourth embodiment has a lateral chromatic aberration in the infrared region between -3.6 μm and 1.8 μm.

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 in the visible light region and the infrared light region can be effectively corrected, thereby obtaining better optical performance.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone who is familiar with the art can do various things without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be subject to those defined by the attached patent scope.

1‧‧‧Wide-angle lens

L11‧‧‧First lens

L12‧‧‧Second lens

L13‧‧‧Third lens

L14‧‧‧Fourth lens

L15‧‧‧Fifth lens

L16‧‧‧Sixth lens

L17‧‧‧Seventh lens

L18‧‧‧Eighth lens

L19‧‧‧Ninth lens

L110‧‧‧Tenth lens

ST1‧‧‧Aperture

OF1‧‧‧Filter

CG1‧‧‧Protection glass

OA1‧‧‧Optical axis

IMA1‧‧‧Image surface

S11‧‧‧Object side of the first lens

S12‧‧‧First lens image side

S13‧‧‧Object side of second lens

S14‧‧‧Second lens image side

S15‧‧‧Third lens object side

S16‧‧‧Third lens image side

S17‧‧‧Fourth lens object side

S18‧‧‧Fourth lens image side

S19‧‧‧Aperture surface

S110‧‧‧Fifth lens object side

S111‧‧‧Fifth lens image side

S112‧‧‧Sixth lens object side

S113‧‧‧Sixth lens image side

S113‧‧‧Seventh lens object side

S114‧‧‧Seventh lens image side

S115‧‧‧The eighth lens object side

S116‧‧‧8th lens image side

S117‧‧‧Object side of ninth lens

S118‧‧‧Ninth lens image side

S119‧‧‧Object side of tenth lens

S120‧‧‧Tenth lens image side

S121‧‧‧The side of the filter object

S122‧‧‧Filter image side

S123‧‧‧Protect the glass side

S124‧‧‧Protect the side of the glass image

Claims (10)

A wide-angle lens comprising: a first lens with negative refractive power; a second lens with negative refractive power; a third lens with negative refractive power, the third lens including a convex surface facing an image side; a fourth lens with positive refractive power, the The fourth lens includes a convex surface facing an object side; a fifth lens has a positive refractive power, the fifth lens includes a convex surface facing the object side; a sixth lens has a positive refractive power, the sixth lens includes a convex surface facing the object side A seventh lens has refractive power, the seventh lens includes a concave surface facing the image side; an eighth lens has refractive power; a ninth lens has positive refractive power; and a tenth lens has positive refractive power, and the tenth lens is curved Moon lens; wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens and The tenth lens is arranged in order from the object side to the image side along an optical axis. The wide-angle lens described in claim 1, wherein: the first lens includes a convex surface facing the object side and a concave surface facing the image side; the second lens includes a convex surface facing the object side and a concave surface facing the image The third lens further includes a concave surface facing the object side; the fourth lens further includes a convex surface facing the image side; the fifth lens further includes a convex surface facing the image side; the sixth lens further includes a convex surface facing The image side The seventh lens element has negative refractive power and further includes a concave surface facing the object side; the eighth lens element has positive refractive power and includes a convex surface facing the object side and another convex surface facing the image side; the ninth lens includes a convex surface facing the The object side and the other convex surface face the image side; and the tenth lens includes a convex surface facing the object side and a concave surface facing the image side. The wide-angle lens described in claim 1 further includes an eleventh lens disposed between the sixth lens and the seventh lens, wherein: the first lens includes a convex surface facing the object side and a concave surface Facing the image side; the second lens includes a convex surface facing the object side and a concave surface facing the image side; the third lens further includes a concave surface facing the object side; the fourth lens further includes a convex surface facing the image side; The fifth lens further includes a concave surface facing the image side; the sixth lens further includes a concave surface facing the image side; the seventh lens has a negative refractive power and further includes a concave surface facing the object side; the eighth lens has a positive refractive power And includes a convex surface facing the object side and another convex surface facing the image side; the ninth lens includes a convex surface facing the object side and another convex surface facing the image side; the tenth lens includes a concave surface facing the object side and a The convex surface faces the image side; and the eleventh lens has positive refractive power and includes a convex surface facing the object side and another convex surface facing the image side. The wide-angle lens described in item 3 of the scope of patent application, wherein the eleventh lens, the seventh lens, and the eighth lens are cemented. The wide-angle lens described in item 1 or item 2 of the scope of patent application, wherein the sixth lens and the seventh lens are cemented. For the wide-angle lens described in any one of claims 1 to 4 of the scope of the patent application, the wide-angle lens meets the following conditions: 2.7

R ₁₁ /R ₁₂

3.7; 1.6

D ₁₂ /R ₁₂ <1.81; where R ₁₁ is a curvature radius of an object side surface of the first lens, R _{12 is a} curvature radius of an image side surface of the first lens, and D _{12 is a} curvature radius of the first lens One of the optical effective diameters of the image side. Such as the wide-angle lens described in any one of claims 1 to 4 of the scope of patent application, wherein the wide-angle lens meets the following conditions: 64mm ²

R ₃₁ ×R ₃₂

108mm ² ; where R ₃₁ is a curvature radius of an object side surface of the third lens, and R _{32 is a} curvature radius of an image side surface of the third lens. For the wide-angle lens described in any one of claims 1 to 4 in the scope of the patent application, the wide-angle lens satisfies the following conditions: 1.8

Nd ₅

2.1; Among them, Nd _{5 is a} refractive index of the fifth lens. For the wide-angle lens described in any one of claims 1 to 4 in the scope of the patent application, the wide-angle lens satisfies the following conditions: 65

Vd ₆ +Vd ₇

94; where Vd _{6 is an} Abbe coefficient of the sixth lens, and Vd _{7 is an} Abbe coefficient of the seventh lens. Such as the wide-angle lens described in any one of claims 1 to 4 of the scope of patent application, wherein the wide-angle lens meets the following conditions: -0.95

R ₇₂ -R ₈₁

0.40; where R _{72 is a} radius of curvature of an image side surface of the seventh lens, and R _{81 is a} radius of curvature of an object side surface of the eighth lens.

Images