TWI722704B - 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, and an eighth lens. The first lens is a meniscus lens with refractive power. The second lens is a meniscus lens with negative refractive power. The third lens is with refractive power. The fourth lens is with positive refractive power. The fifth lens is with refractive power and includes a convex surface facing an object side. The sixth lens is with positive refractive power. The seventh lens is with refractive power and includes a concave surface facing the object side. The eighth lens is with refractive power and includes a convex surface facing an image side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens are arranged in order from the object side to the image side along an optical axis.

Description

Wide-angle lens (twenty-three)

The invention relates to a wide-angle lens.

The development trend of today’s wide-angle lenses, in addition to the continuous development towards miniaturization and large apertures, with different application requirements, it also needs to have high resolution and resistance to environmental temperature changes. The conventional wide-angle lenses can no longer meet today’s needs. A wide-angle lens with another new architecture is needed to meet the needs of miniaturization, large aperture, high resolution, and resistance to environmental temperature changes.

In view of this, the main purpose of the present invention is to provide a wide-angle lens, which has a shorter overall lens length, smaller aperture value, higher resolution, resistance to environmental temperature changes, but still has 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, and an eighth lens. The first lens has a refractive power of a meniscus lens. The second lens has a negative refractive power and is a meniscus lens. The third lens has refractive power. The fourth lens has positive refractive power. The fifth lens has refractive power and includes a convex surface facing an object side. The sixth lens has positive refractive power. The seventh lens has refractive power and includes a concave surface facing the object side. The eighth lens has refractive power and includes a convex surface facing an image side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are arranged in order from the object side to the image side along an optical axis, and the distance between the lenses The relative position is fixed.

The sixth lens is cemented with the seventh lens.

It may further include a ninth lens arranged between the eighth lens and the image side, and the ninth lens has negative refractive power.

The eighth lens is cemented with the ninth lens.

It may further include a tenth lens, which is arranged between the ninth lens and the image side, and the tenth lens has positive refractive power.

The first lens has positive refractive power. 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 has a negative refractive power. The three lenses include a concave surface facing the image side, the fourth lens includes a convex surface facing the image side, the fifth lens has a positive refractive power, the sixth lens includes a convex surface facing the object side and another convex surface facing the image side, and the seventh lens has a negative refractive power. The eighth lens has positive refractive power, and the eighth lens may further include a convex surface facing the object side.

The first lens has negative refractive power. 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 has positive refractive power. The three lenses include a concave surface toward the object side and a convex surface toward the image side. The fourth lens includes a convex surface toward the object side and a concave surface toward the image side. The fifth lens has positive refractive power. The fifth lens can further include a convex surface toward the image side. The sixth lens includes a convex surface facing the object side and another convex surface facing the image side. The seventh lens has negative refractive power, and the eighth lens has positive refractive power. The eighth lens may further include a concave surface facing the object side.

Among them, the wide-angle lens meets the following conditions: 5.5<TTL/f<10;1.3<TTL/R ₁₁ <2.6; where f is the effective focal length of the wide-angle lens, R ₁₁ is the curvature radius of one of the side surfaces of the first lens, and TTL is A distance from the object side surface of the first lens to an imaging surface on the optical axis.

The wide-angle lens satisfies the following conditions: 0.03<|f ₁₂ /f ₃₄ |<1.7; where f ₁₂ is the effective focal length of one of the first lens and the second lens, and f ₃₄ is the effective combination of one of the third lens and the fourth lens focal length.

The wide-angle lens satisfies the following conditions: 64.3>Vd ₁ >30;54.5>Vd ₂ >35; where Vd ₁ is one of the Abbe coefficients of the first lens, and Vd ₂ is one of the Abbe coefficients of the second lens.

When TTL/f meets the above conditions, it can effectively balance the angle of view and the total length of the wide-angle lens to facilitate more diverse application areas. When the TTL/R ₁₁ satisfies the above conditions, it will help shorten the total optical length and enhance the miniaturization of wide-angle lenses. When |f ₁₂ /f ₃₄ | meets the above conditions, the refractive power distribution at the object side and the middle of the lens can be balanced to effectively control the lens angle of view. When Vd ₁ satisfies the above conditions, the first lens can be made to have an appropriate Abbe coefficient to correct chromatic aberration. When Vd ₂ satisfies the above conditions, the second lens can be made to have an appropriate Abbe coefficient to correct chromatic aberration.

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

1, 2, 3, 4, 5, 6, 7, 8, 9‧‧‧Wide angle lens

L11, L21, L31, L41, L51, L61, L71, L81, L91‧‧‧First lens

L12, L22, L32, L42, L52, L62, L72, L82, L92‧‧‧Second lens

L13, L23, L33, L43, L53, L63, L73, L83, L93‧‧‧Third lens

L14, L24, L34, L44, L54, L64, L74, L84, L94‧‧‧Fourth lens

L15, L25, L35, L45, L55, L65, L75, L85, L95‧‧‧Fifth lens

L16, L26, L36, L46, L56, L66, L76, L86, L96‧‧‧Sixth lens

L17, L27, L37, L47, L57, L67, L77, L87, L97‧‧‧Seventh lens

L18, L28, L38, L48, L58, L68, L78, L88, L98‧‧‧Eighth lens

L19, L29, L39, L49, L59, L79, L89, L99‧‧‧Ninth lens

L510‧‧‧Tenth lens

ST1, ST2, ST3, ST4, ST5, ST6, ST7, ST8, ST9‧‧‧Aperture

OA1, OA2, OA3, OA4, OA5, OA6, OA7, OA8, OA9‧‧‧Optical axis

OF1, OF2, OF3, OF7, OF8, OF9‧‧‧Filter

CG1, CG2, CG3, CG4, CG5, CG6, CG7, CG8, CG9‧‧‧Protection glass

IMA1, IMA2, IMA3, IMA4, IMA5, IMA6, IMA7, IMA8‧‧‧imaging surface

IMA9‧‧‧imaging surface

S11, S21, S31, S41, S51, S61, S71, S81, S91‧‧‧Object side of the first lens

S12, S22, S32, S42, S52, S62, S72, S82, S92‧‧‧The side of the first lens image

S13, S23, S33, S43, S53, S63, S73, S83, S93‧‧‧Second lens object side

S14, S24, S34, S44, S54, S64, S74, S84, S94‧‧‧Second lens image side

S15, S25, S35, S45, S55, S65, S75, S85, S95‧‧‧Third lens object side

S16, S26, S36, S46, S56, S66, S76, S86, S96‧‧‧Third lens image side

S17, S27, S37, S47, S57, S67, S77, S87, S97‧‧‧Object side of the fourth lens

S18, S28, S38, S48, S58, S68, S78, S88, S98‧‧‧Fourth lens image side

S19, S29, S39, S49, S59, S69, S710, S810, S910‧‧‧Fifth lens object side

S110, S210, S310, S410, S510, S610, S711, S811, S911‧‧‧Fifth lens image side

S111, S211, S311, S411, S511, S611, S79, S89, S99‧‧‧Aperture surface

S112, S212, S312, S412, S512, S612, S712, S812, S912‧‧‧Sixth lens object side

S113, S213, S313, S413, S513, S613, S713, S813, S913‧‧‧Sixth lens image side (7th lens object side)

S114, S214, S314, S414, S514, S614, S714, S814, S914‧‧‧Seventh lens image side

S115, S215, S315, S415, S515, S615, S715, S815, S915‧‧‧The eighth lens object side

S116, S216, S316, S416‧‧‧The image side of the eighth lens (the object side of the ninth lens)

S516, S616, S716, S816, S916‧‧‧8th lens image side

S517, S717, S817, S917‧‧‧Object side of the ninth lens

S117, S217, S317, S417, S518, S718, S818, S918‧‧‧Ninth lens image side

S519‧‧‧Tenth lens object side

S520‧‧‧Tenth lens image side

S118, S218, S318, S719, S819, S919‧‧‧Side of the filter object

S119, S219, S319, S720, S820, S920‧‧‧Filter image side

S120, S220, S320, S418, S521, S617, S721, S821, S921‧‧‧Protect the side of the glass object

S121, S221, S321, S419, S522, S618, S722, S822, S922‧‧‧Protecting 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.

Figure 2A is a Field Curvature diagram of the first embodiment of the wide-angle lens according to the present invention.

Fig. 2B is a distortion diagram of the first embodiment of the wide-angle lens according to the present invention.

Figure 2C is a Lateral Color diagram of the first embodiment of the wide-angle lens according to the present invention.

Figure 2D is a Relative Illumination diagram of the first embodiment of the wide-angle lens according to the present invention.

Figure 2E is a spot diagram of the first embodiment of the wide-angle lens according to the present invention.

Figure 2F is a Modulation Transfer Function diagram of the first embodiment of the wide-angle lens according to the present invention.

Figure 2G is a Through Focus Modulation Transfer Function diagram 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 field curvature diagram of the second embodiment of the wide-angle lens according to the present invention.

Figure 4B is a distortion diagram of the second embodiment of the wide-angle lens according to the present invention.

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

Fig. 4D is a relative contrast diagram of the second embodiment of the wide-angle lens according to the present invention.

Fig. 4E is a light spot diagram of the second embodiment of the wide-angle lens according to the present invention.

Figure 4F is a diagram of the modulation transfer function of the second embodiment of the wide-angle lens according to the present invention.

Fig. 4G is a defocus modulation transfer function diagram 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 field curvature diagram of the third embodiment of the wide-angle lens according to the present invention.

Fig. 6B is a distortion diagram of the third embodiment of the wide-angle lens according to the present invention.

Fig. 6C is a lateral chromatic aberration diagram of the third embodiment of the wide-angle lens according to the present invention.

Fig. 6D is a relative contrast diagram of the third embodiment of the wide-angle lens according to the present invention.

Fig. 6E is a light spot diagram of the third embodiment of the wide-angle lens according to the present invention.

Figure 6F is a diagram of the modulation transfer function of the third embodiment of the wide-angle lens according to the present invention.

Fig. 6G is a diagram of the defocus modulation transfer function 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 field curvature diagram of the fourth embodiment of the wide-angle lens according to the present invention.

FIG. 8B is a distortion diagram of the fourth embodiment of the wide-angle lens according to the present invention.

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

Fig. 8D is a relative contrast diagram of the fourth embodiment of the wide-angle lens according to the present invention.

Fig. 8E is a light spot diagram of the fourth embodiment of the wide-angle lens according to the present invention.

Figure 8F is a diagram of the modulation transfer function of the fourth embodiment of the wide-angle lens according to the present invention.

Fig. 8G is a defocus modulation transfer function diagram of the fourth embodiment of the wide-angle lens according to the present invention.

FIG. 9 is a schematic diagram of the lens configuration of the fifth embodiment of the wide-angle lens according to the present invention.

FIG. 10A is a field curvature diagram of the fifth embodiment of the wide-angle lens according to the present invention.

FIG. 10B is a distortion diagram of the fifth embodiment of the wide-angle lens according to the present invention.

Fig. 10C is a lateral chromatic aberration diagram of the fifth embodiment of the wide-angle lens according to the present invention.

FIG. 10D is a relative contrast diagram of the fifth embodiment of the wide-angle lens according to the present invention.

Fig. 10E is a light spot diagram of the fifth embodiment of the wide-angle lens according to the present invention.

Figure 10F is a diagram of the modulation transfer function of the fifth embodiment of the wide-angle lens according to the present invention.

Fig. 10G is a defocus modulation transfer function diagram of the fifth embodiment of the wide-angle lens according to the present invention.

FIG. 11 is a schematic diagram of the lens configuration of the sixth embodiment of the wide-angle lens according to the present invention.

Fig. 12A is a field curvature diagram of the sixth embodiment of the wide-angle lens according to the present invention.

Figure 12B is a distortion diagram of the sixth embodiment of the wide-angle lens according to the present invention.

Figure 12C is a lateral chromatic aberration diagram of the sixth embodiment of the wide-angle lens according to the present invention.

Figure 12D is a relative contrast diagram of the sixth embodiment of the wide-angle lens according to the present invention.

Fig. 12E is a light spot diagram of the sixth embodiment of the wide-angle lens according to the present invention.

Figure 12F is a diagram of the modulation transfer function of the sixth embodiment of the wide-angle lens according to the present invention.

Figure 12G is a graph of the defocus modulation transfer function of the sixth embodiment of the wide-angle lens according to the present invention.

FIG. 13 is a schematic diagram of the lens arrangement of the seventh embodiment of the wide-angle lens according to the present invention.

Fig. 14A is a longitudinal aberration diagram of the seventh embodiment of the wide-angle lens according to the present invention

Figure 14B is a field curvature diagram of the seventh embodiment of the wide-angle lens according to the present invention.

Figure 14C is a distortion diagram of the seventh embodiment of the wide-angle lens according to the present invention.

Fig. 14D is a lateral chromatic aberration diagram of the seventh embodiment of the wide-angle lens according to the present invention.

Figure 14E is a diagram of the modulation transfer function of the seventh embodiment of the wide-angle lens according to the present invention.

FIG. 15 is a schematic diagram of the lens configuration of the eighth embodiment of the wide-angle lens according to the present invention.

Figure 16A is a longitudinal aberration diagram of the eighth embodiment of the wide-angle lens according to the present invention

Figure 16B is a field curvature diagram of the eighth embodiment of the wide-angle lens according to the present invention.

Figure 16C is a distortion diagram of the eighth embodiment of the wide-angle lens according to the present invention.

Figure 16D is a lateral chromatic aberration diagram of the eighth embodiment of the wide-angle lens according to the present invention.

Figure 16E is a diagram of the modulation transfer function of the eighth embodiment of the wide-angle lens according to the present invention.

FIG. 17 is a schematic diagram of the lens configuration of the ninth embodiment of the wide-angle lens according to the present invention.

Figure 18A is a longitudinal aberration diagram of the ninth embodiment of the wide-angle lens according to the present invention

Figure 18B is a field curvature diagram of the ninth embodiment of the wide-angle lens according to the present invention.

Figure 18C is a distortion diagram of the ninth embodiment of the wide-angle lens according to the present invention.

Figure 18D is a lateral chromatic aberration diagram of the ninth embodiment of the wide-angle lens according to the present invention.

Figure 18E is a diagram of the modulation transfer function of the ninth embodiment of the wide-angle lens according to the present invention.

The present invention provides a wide-angle lens, including: a first lens with refractive power, the first lens is a meniscus lens; a second lens with negative refractive power, the second lens is a meniscus lens; a third lens with refractive power; A fourth lens has a positive refractive power; a fifth lens has a positive refractive power, the fifth lens includes a convex surface facing an object side; a sixth lens has a positive refractive power, the sixth lens is a double convex lens; a seventh lens has a negative Refractive power, the seventh lens includes a concave surface facing the object side; and an eighth lens has a positive refractive power, the eighth lens includes a convex surface facing an image side; wherein the first lens, the second lens, the third lens, and the fourth lens , The fifth lens, the sixth lens, the seventh lens, and the eighth lens are arranged in order from the object side to the image side along an optical axis, and the relative positions of the lenses are fixed.

The object side surface of the first lens can be convex; thereby, it helps to receive light, reduce the surface reflection of light in the wide field of view, and improve the illuminance of the wide field of view. The image side surface of the first lens may be concave; thereby, it helps to reduce the generation of astigmatism. The second lens can have negative refractive power; thereby, it is helpful to correct the aberrations and distortions generated by the first lens. The object side surface of the second lens can be convex; Adjusting the surface shape of the second lens helps to receive the incident light from a large angle of view, so that it can spread smoothly in the wide-angle lens. The image side surface of the second lens may be concave; thereby, it helps to reduce the generation of astigmatism. The fifth lens can have a positive refractive power; thereby, it helps to evenly distribute the positive refractive power of the wide-angle lens to reduce the aberration generated by a single lens. The object side surface of the fifth lens can be convex; thereby, the surface shape of the fifth lens can be adjusted to help correct off-axis aberrations such as curvature. The sixth lens can have positive refractive power, its object side can be convex, and its image side can be convex; thereby, the light-gathering ability of a wide-angle lens can be provided and the total length of the wide-angle lens can be reduced to meet the needs of miniaturization. The seventh lens can have negative refractive power; thereby, it helps to balance the positive refractive power of the sixth lens and effectively correct chromatic aberration. The object side of the seventh lens can be concave; thereby, it can help correct chromatic aberration. The eighth lens can have positive refractive power; thereby, it is helpful to match the seventh lens with strong negative refractive power to correct peripheral aberrations. The image side surface of the eighth lens can be convex; thereby, it helps to further reduce the total length of the wide-angle lens. In the wide-angle lens disclosed in the present invention, the configuration of the aperture is a center aperture, which helps to expand the angle of view of the wide-angle lens. The middle aperture means that the aperture is set between the first lens and the imaging surface.

Please refer to Table 1, Table 3, Table 5, Table 7, Table 9, Table 11, Table 12, Table 14, Table 15, Table 17, Table 18, Table 20 and Table 21 , Where Table 1, Table 3, Table 5, Table 7, Table 9, Table 11, Table 14, Table 17, and Table 20 are the first to ninth embodiments of the wide-angle lens according to the present invention The relevant parameter table of each lens, Table 12, Table 15, Table 18 and Table 21 are the aspheric surface of the aspheric lens in Table 11, Table 14, Table 17 and Table 20 respectively Related parameter table.

Figures 1, 3, 5, 7, 9, 11, 13, 15, and 17 are schematic diagrams of the lens configuration of the first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth embodiments of the wide-angle lens of the present invention, respectively , Where the first lens L11, L21, L31, L41, L51, L61, L71, L81, L91 are meniscus The lens is made of glass. The object side surface S11, S21, S31, S41, S51, S61, S71, S81, S91 is convex, like the side surface S12, S22, S32, S42, S52, S62, S72, S82, S92 The object side surfaces S11, S21, S31, S41, S51, S61, S71, S81, S91 and the image side surfaces S12, S22, S32, S42, S52, S62, S72, S82, and S92 are all spherical surfaces.

The second lens L12, L22, L32, L42, L52, L62, L72, L82, L92 are meniscus lenses with negative refractive power, made of glass, and its object sides S13, S23, S33, S43, S53, S63, S73, S83, S93 are convex surfaces, image side surfaces S14, S24, S34, S44, S54, S64, S74, S84, S94 are concave surfaces, object side surfaces S13, S23, S33, S43, S53, S63, S73, S83, S93 and The image sides S14, S24, S34, S44, S54, S64, S74, S84, and S94 are all spherical surfaces.

The third lenses L13, L23, L33, L43, L53, L63, L73, L83, and L93 have refractive power and are made of glass.

The fourth lenses L14, L24, L34, L44, L54, L64, L74, L84, L94 have positive refractive power and are made of glass.

The fifth lens L15, L25, L35, L45, L55, L65, L75, L85, L95 has positive refractive power and is made of glass. Its object sides are S19, S29, S39, S49, S59, S69, S710, S810, S910 The object side surface S19, S29, S39, S49, S59, S69, S710, S810, S910 and the image side surface S110, S210, S310, S410, S510, S610, S711, S811, and S911 are all spherical surfaces.

The sixth lens L16, L26, L36, L46, L56, L66, L76, L86, L96 is a double convex lens with positive refractive power, made of glass material, its object side S112, S212, S312, S412, S512, S612, S712, S812 and S912 are convex, like side S113, S213, S313, S413, S513, S613, S713, S813, S913 are convex surfaces, the object side surface S112, S212, S312, S412, S512, S612, S712, S812, S912 and the image side surface S113, S213, S313, S413, S513, S613, S713, Both S813 and S913 are spherical surfaces.

The seventh lens L17, L27, L37, L47, L57, L67, L77, L87, L97 has negative refractive power and is made of glass. Its object sides are S113, S213, S313, S413, S513, S613, S713, S813, S913 The object side surface S113, S213, S313, S413, S513, S613, S713, S813, S913 and the image side surface S114, S214, S314, S414, S514, S614, S714, S814, S914 are spherical surfaces.

The eighth lens L18, L28, L38, L48, L58, L68, L78, L88, L98 has positive refractive power and is made of glass, which looks like side S116, S216, S316, S416, S516, S616, S716, S816, S916 It is convex.

The sixth lens L16, L26, L36, L46, L56, L66, L76, L86, L96 are cemented with the seventh lens L17, L27, L37, L47, L57, L67, L77, L87, L97, respectively.

In addition, wide-angle lenses 1, 2, 3, 4, 5, 6, 7, 8, 9 meet at least one of the following conditions:

5.5<TTL/f<10 (1)

1.3<TTL/R ₁₁ <2.6 (2)

0.03<|f ₁₂ /f ₃₄ |<1.7 (3)

64.3>Vd ₁ >30 (4)

54.5>Vd ₂ >35 (5)

Among them, f is the effective focal length of one of the wide-angle lenses 1, 2, 3, 4, 5, 6, 7, 8, and 9 in the first embodiment to the ninth embodiment _{, and f 12 is the first embodiment to the ninth embodiment} Among them, the effective focal length of one of the first lens L11, L21, L31, L41, L51, L61, L71, L81, L91 and the second lens L12, L22, L32, L42, L52, L62, L72, L82, L92, f ₃₄ is the first embodiment to the ninth embodiment, the third lens L13, L23, L33, L43, L53, L63, L73, L83, L93 and the fourth lens L14, L24, L34, L44, L54, L64, L74 , L84, L94 combined effective focal length, R ₁₁ is the object side S11, S21 of the first lens L11, L21, L31, L41, L51, L61, L71, L81, L91 in the first embodiment to the ninth embodiment , S31, S41, S51, S61, S71, S81, S91 one of the radius of curvature, TTL is the first embodiment to the ninth embodiment, the first lens L11, L21, L31, L41, L51, L61, L71, L81 , L91 object side S11, S21, S31, S41, S51, S61, S71, S81, S91 respectively to the imaging surface IMA1, IMA2, IMA3, IMA4, IMA5, IMA6, IMA7, IMA8, IMA9 on the optical axis OA1, OA2 A pitch on OA3, OA4, OA5, OA6, OA7, OA8, OA9, Vd ₁ is the first to the ninth embodiment, the first lens L11, L21, L31, L41, L51, L61, L71, L81 , L91 is an Abbe coefficient, Vd ₂ is an Abbe coefficient of the second lens L12, L22, L32, L42, L52, L62, L72, L82, L92 in the first embodiment to the ninth embodiment. The wide-angle lens 1, 2, 3, 4, 5, 6, 7, 8, 9 can effectively reduce the total length of the lens, effectively reduce the aperture value, effectively improve the resolution, effectively resist environmental temperature changes, and effectively correct the image Poor and effective correction of chromatic aberration.

The first embodiment of the wide-angle lens of the present invention will now be described in detail. Please refer to Figure 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 A fifth lens L15, an aperture ST1, a sixth lens L16, a seventh lens L17, an eighth lens L18, a ninth lens L19, a filter OF1 and a protective glass CG1. When imaging, the light from the object side is finally imaged on an imaging surface IMA1. According to [Implementation Mode] paragraphs 1 to 11, in which:

The first lens L11 has positive refractive power;

The third lens L13 is a biconcave lens with negative refractive power, the object side S15 is concave, the image side S16 is concave, and both the object side S15 and the image side S16 are spherical surfaces;

The fourth lens L14 is a meniscus lens, the object side surface S17 is a concave surface, the image side surface S18 is a convex surface, and both the object side surface S17 and the image side surface S18 are spherical surfaces;

The fifth lens L15 is a double convex lens, and its image side surface S110 is a convex surface;

The seventh lens L17 is a meniscus lens, and its image side surface S114 is convex;

The eighth lens L18 is a double convex lens, the object side S115 is convex, and both the object side S115 and the image side S116 are spherical surfaces;

The ninth lens L19 is a meniscus lens with negative refractive power and is made of glass material. The object side surface S116 is a concave surface, the image side surface S117 is a convex surface, and both the object side surface S116 and the image side surface S117 are spherical surfaces;

The eighth lens L18 is cemented with the ninth lens L19;

The object side S118 and the image side S119 of the filter OF1 are both flat surfaces;

The protective glass CG1 has a flat surface on the object side S120 and the image side S121;

Using the above-mentioned lens, aperture ST1, and a design that meets at least one of the conditions (1) to (5), the wide-angle lens 1 can effectively reduce the total length of the lens, effectively reduce the aperture value, effectively improve the resolution, and effectively Environmental temperature changes, effective correction of aberrations, effective correction of chromatic aberrations.

If the condition (1) the value of TTL/f is greater than 10, it is difficult to achieve the goal of miniaturization of the lens. Therefore, the value of TTL/f must be at least less than 10, so the best effect range is 5.5 < TTL / f <10. If this range is met, the best lens miniaturization conditions are available.

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

Table 2 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 (5). From Table 2, 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 (5).

In addition, the optical performance of the wide-angle lens 1 of the first embodiment can also meet the requirements. It can be seen from FIG. 2A that the field curvature of the wide-angle lens 1 of the first embodiment is between -0.01 mm and 0.04 mm. It can be seen from Fig. 2B that the distortion of the wide-angle lens 1 of the first embodiment is between -8% and 0%. It can be seen from FIG. 2C that the lateral chromatic aberration of the wide-angle lens 1 of the first embodiment is between -0.5 μm and 1.7 μm. It can be seen from Fig. 2D that the relative illuminance of the wide-angle lens 1 of the first embodiment is between 0.58 and 1.0. It can be seen from Figure 2E that when the image height of the wide-angle lens 1 of the first embodiment is 0.000mm, the Root Mean Square radius of the light spot is 0.912μm, and the geometrical radius of the light spot is 3.298μm, when the image height is 2.778mm, the root mean square (Root Mean Square) radius of the light spot is 1.479μm, the geometrical radius of the light spot is 6.950μm, when the image height is 3.928mm, the light The root mean square (Root Mean Square) radius of the point is 1.893 μm, and the geometric (Geometrical) radius of the light point is 11.756 μm. It can be seen from FIG. 2F that the value of the modulation transfer function of the wide-angle lens 1 of the first embodiment is between 0.60 and 1.0. It can be seen from Fig. 2G that the wide-angle lens 1 of the first embodiment has a modulation transfer function value between 0.0 and 0.76 when the focus shift is between -0.05 mm and 0.05 mm.

It is obvious that the curvature of field, distortion, and lateral chromatic aberration of the wide-angle lens 1 of the first embodiment can be effectively corrected, and the relative illuminance, lens resolution, and focal depth can also meet the requirements, 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, a fifth lens L25, a fifth lens L25, and a first lens L21, a second lens L22, a third lens L23, a fourth lens L24, a third lens L23, a second lens L22, a third lens L23, a third lens L23, a fourth lens L24, a third lens L23, a fourth lens L24, a third lens L23, a fourth lens L24, a The aperture ST2, a sixth lens L26, a seventh lens L27, an eighth lens L28, a ninth lens L29, a filter OF2 and a protective glass CG2. When imaging, the light from the object side is finally imaged on an imaging surface IMA2. According to [Implementation Mode] 1st to 11th Paragraph, where:

The first lens L21 has positive refractive power;

The third lens L23 is a meniscus lens with negative refractive power, the object side S25 is convex, the image side S26 is concave, and both the object side S25 and the image side S26 are spherical surfaces;

The fourth lens L24 is a meniscus lens, the object side surface S27 is a concave surface, the image side surface S28 is a convex surface, and both the object side surface S27 and the image side surface S28 are spherical surfaces;

The fifth lens L25 is a double convex lens, and its image side surface S210 is convex;

The seventh lens L27 is a meniscus lens, and its image side surface S214 is a convex surface;

The eighth lens L28 is a biconvex lens, the object side S215 is convex, and both the object side S215 and the image side S216 are spherical surfaces;

The ninth lens L29 is a meniscus lens with negative refractive power and is made of glass material. The object side surface S216 is a concave surface, the image side surface S217 is a convex surface, and both the object side surface S216 and the image side surface S217 are spherical surfaces;

The eighth lens L28 is cemented with the ninth lens L29;

The object side S218 and the image side S219 of the filter OF2 are both flat surfaces;

The protective glass CG2, the object side S220 and the image side S221 are both flat surfaces;

Using the above lens, aperture ST2, and a design that meets at least one of the conditions (1) to (5), the wide-angle lens 2 can effectively reduce the total length of the lens, effectively reduce the aperture value, effectively increase the resolution, and effectively Environmental temperature changes, effective correction of aberrations, effective correction of chromatic aberrations.

If condition (2) _{the value of TTL/R 11} is greater than 2.6, it is difficult to shorten the total length of the lens. Therefore, the value of TTL/R ₁₁ must be at least less than 10, so the best effect range is 1.3 <TTL/R ₁₁ <2.6. If this range is met, the conditions for the best lens miniaturization are available.

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

Table 4 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 (5). From Table 4, 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 (5).

In addition, the optical performance of the wide-angle lens 2 of the second embodiment can also meet the requirements. It can be seen from Fig. 4A that the wide-angle lens 2 of the second embodiment has a field curvature of -0.03mm to 0.04mm. It can be seen from FIG. 4B that the distortion of the wide-angle lens 2 of the second embodiment is between -8% and 0%. It can be seen from FIG. 4C that the lateral chromatic aberration of the wide-angle lens 2 of the second embodiment is between -0.5 μm and 1.7 μm. It can be seen from Fig. 4D that the relative illuminance of the wide-angle lens 2 of the second embodiment is between 0.68 and 1.0. It can be seen from Figure 4E that the wide-angle lens 2 of the second embodiment, when the image height is 0.000mm, the root mean square radius of the spot is 1.192μm, the geometric radius of the spot is 6.500μm, when the image height is 2.778 When mm, the root mean square radius of the light spot is 2.110μm, and the geometric radius of the light spot is 11.556μm. When the image height is 3.928mm, the root mean square radius of the light spot is 3.310μm, and the geometric radius of the light spot is 15.712μm. It can be seen from FIG. 4F that the value of the modulation transfer function of the wide-angle lens 2 of the second embodiment is between 0.55 and 1.0. It can be seen from Fig. 4G that the wide-angle lens 2 of the second embodiment has a modulation transfer function value between 0.0 and 0.75 when the focus shift is between -0.05 mm and 0.05 mm.

It is obvious that the curvature of field, distortion, and lateral chromatic aberration of the wide-angle lens 2 of the second embodiment can be effectively corrected, and the relative illuminance, lens resolution, and focal depth can also meet the requirements, 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, a fifth lens L35, a fifth lens L35, and a first lens L31, a second lens L32, a third lens L33, a fourth lens L34, a fifth lens Aperture ST3, a sixth lens L36, a seventh lens L37, an eighth lens L38, a ninth lens L39, a filter OF3 and a protective glass CG3. When imaging, the light from the object side is finally imaged on an imaging surface IMA3. According to [Implementation Mode] 1st to 11th Paragraph, where:

The first lens L31 has positive refractive power;

The third lens L33 is a biconcave lens with negative refractive power, the object side surface S35 is a concave surface, the image side surface S36 is a concave surface, and both the object side surface S35 and the image side surface S36 are spherical surfaces;

The fourth lens L34 is a meniscus lens, the object side surface S37 is a concave surface, the image side surface S38 is a convex surface, and both the object side surface S37 and the image side surface S38 are spherical surfaces;

The fifth lens L35 is a meniscus lens, and its image side surface S310 is a concave surface;

The seventh lens L37 is a meniscus lens, and the image side surface S314 is convex;

The eighth lens L38 is a double-convex lens, the object side S315 is convex, and both the object side S315 and the image side S316 are spherical surfaces;

The ninth lens L39 is a meniscus lens with negative refractive power and is made of glass material. The object side surface S316 is concave, the image side surface S317 is convex, and both the object side surface S316 and the image side surface S317 are spherical surfaces;

The eighth lens L38 is cemented with the ninth lens L39;

The object side S318 and the image side S319 of the filter OF3 are both flat surfaces;

The protective glass CG3, the object side S320 and the image side S321 are both flat;

Utilizing the above-mentioned lens, aperture ST3, and a design that meets at least one of the conditions (1) to (5), the wide-angle lens 3 can effectively reduce the total length of the lens, effectively reduce the aperture value, effectively increase the resolution, and effectively Environmental temperature changes, effective correction of aberrations, effective correction of chromatic aberrations.

If the value of condition (3) |f ₁₂ /f ₃₄ | is greater than 1.7, the ability to balance the refractive power distribution between the object side and the middle of the lens is reduced. Therefore, the value of |f ₁₂ /f ₃₄ | must be at least less than 1.7, so the best effect range is 0.03<|f ₁₂ /f ₃₄ |<1.7, which can effectively control the angle of view of the lens.

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

Table 6 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 (5). From Table 6, 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 (5).

In addition, the optical performance of the wide-angle lens 3 of the third embodiment can also meet the requirements. It can be seen from Fig. 6A that the field curvature of the wide-angle lens 3 of the third embodiment is between -0.02mm and 0.05mm. It can be seen from FIG. 6B that the distortion of the wide-angle lens 3 of the third embodiment is between -8% and 0%. It can be seen from FIG. 6C that the lateral chromatic aberration of the wide-angle lens 3 of the third embodiment is between -0.5 μm and 1.3 μm. It can be seen from FIG. 6D that the relative illuminance of the wide-angle lens 3 of the third embodiment is between 0.73 and 1.0. It can be seen from Figure 6E that when the image height of the wide-angle lens 3 of the third embodiment is 0.000mm, the root mean square radius of the spot is 1.141μm, the geometric radius of the spot is 2.847μm, and when the image height is 2.778 When mm, the root mean square radius of the light spot is 1.816μm, and the geometric radius of the light spot is 8.275μm. When the image height is 3.928mm, the root mean square radius of the light spot is 3.448μm, and the geometric radius of the light spot is 16.413μm. It can be seen from FIG. 6F that the value of the modulation transfer function of the wide-angle lens 3 of the third embodiment is between 0.58 and 1.0. It can be seen from FIG. 6G that the wide-angle lens 3 of the third embodiment has a modulation transfer function value between 0.0 and 0.72 when the focus shift is between -0.05 mm and 0.05 mm.

It is obvious that the field curvature, distortion, and lateral chromatic aberration of the wide-angle lens 3 of the third embodiment can be effectively corrected, and the relative illuminance, lens resolution, and focal depth can also meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 7, which is a schematic diagram of the lens configuration of the fourth embodiment of the wide-angle lens according to the present invention. The wide-angle lens 4 includes a first lens L41, a second lens L42, a third lens L43, a fourth lens L44, a fifth lens L45, a fifth lens L45, and a first lens L41, a second lens L42, a third lens L43, a fourth lens L44, a fifth lens L45, and a Aperture ST4, a sixth lens L46, a seventh lens L47, an eighth lens L48, a ninth lens L49, and a protective glass CG4. When imaging, the light from the object side is finally imaged on an imaging surface IMA4. According to [Implementation Mode] paragraphs 1 to 11, in which:

The first lens L41 has positive refractive power;

The third lens L43 is a biconcave lens with negative refractive power, the object side S45 is concave, the image side S46 is concave, and both the object side S45 and the image side S46 are spherical surfaces;

The fourth lens L44 is a meniscus lens, the object side S47 is concave, the image side S48 is convex, and both the object side S47 and the image side S48 are spherical surfaces;

The fifth lens L45 is a double convex lens, and the image side surface S410 is convex;

The seventh lens L47 is a meniscus lens, and its image side surface S414 is convex;

The eighth lens L48 is a biconvex lens, the object side surface S415 is a convex surface, and both the object side surface S415 and the image side surface S416 are spherical surfaces;

The ninth lens L49 is a meniscus lens with negative refractive power and is made of glass material. The object side S416 is concave, the image side S417 is convex, and both the object side S416 and the image side S417 are spherical surfaces;

The eighth lens L48 is cemented with the ninth lens L49;

The protective glass CG4 has a flat surface on the object side S418 and the image side S419;

Utilizing the above-mentioned lens, aperture ST4, and a design that meets at least one of the conditions (1) to (5), the wide-angle lens 4 can effectively reduce the total length of the lens, effectively reduce the aperture value, effectively increase the resolution, and effectively Environmental temperature changes, effective correction of aberrations, effective correction of chromatic aberrations.

If the value of condition (4) Vd ₁ is less than 30, the achromatic function is poor. Therefore, _{the value of Vd 1} must be at least greater than 30, so the best effect range is 64.3>Vd ₁ >30, and if this range is met, the best achromatic condition will be obtained.

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

Table 8 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 (5). It can be seen from Table 8 that the wide-angle lens 4 of the fourth embodiment can all satisfy the conditions (1) to The requirements of condition (5).

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. 8A that the field curvature of the wide-angle lens 4 of the fourth embodiment is between -0.015mm and 0.035mm. It can be seen from Fig. 8B that the distortion of the wide-angle lens 4 of the fourth embodiment ranges from -8% to Between 0%. It can be seen from FIG. 8C that the lateral chromatic aberration of the wide-angle lens 4 of the fourth embodiment is between -0.6 μm and 1.6 μm. It can be seen from FIG. 8D that the relative illuminance of the wide-angle lens 4 of the fourth embodiment is between 0.58 and 1.0. It can be seen from Figure 8E that when the image height of the wide-angle lens 4 of the fourth embodiment is 0.000mm, the root mean square radius of the spot is 0.824μm, the geometric radius of the spot is 3.083μm, and when the image height is 2.750 When mm, the root mean square radius of the spot is 1.389μm, and the geometric radius of the spot is 6.870μm. When the image height is 3.928mm, the root mean square radius of the spot is 1.973μm, and the geometric radius of the spot is 11.821μm. It can be seen from FIG. 8F that the value of the modulation transfer function of the wide-angle lens 4 of the fourth embodiment is between 0.58 and 1.0. It can be seen from Fig. 8G that the wide-angle lens 4 of the fourth embodiment has a modulation transfer function value between 0.0 and 0.72 when the focus shift is between -0.05 mm and 0.05 mm.

It is obvious that the field curvature, distortion, and lateral chromatic aberration of the wide-angle lens 4 of the fourth embodiment can be effectively corrected, and the relative illuminance, lens resolution, and focal depth can also meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 9, which is a schematic diagram of the lens configuration of the fifth embodiment of the wide-angle lens according to the present invention. The wide-angle lens 5 includes a first lens L51, a second lens L52, a third lens L53, a fourth lens L54, a fifth lens L55, and one Aperture ST5, a sixth lens L56, a seventh lens L57, an eighth lens L58, a ninth lens L59, a tenth lens L510, and a protective glass CG5. When imaging, the light from the object side is finally imaged on an imaging surface IMA5. According to [Implementation Mode] paragraphs 1 to 11, in which:

The first lens L51 has positive refractive power;

The third lens L53 is a biconcave lens with negative refractive power, and its object side S55 is concave The image side surface S56 is concave, and both the object side surface S55 and the image side surface S56 are spherical surfaces;

The fourth lens L54 is a biconvex lens, the object side S57 is convex, the image side S58 is convex, and both the object side S57 and the image side S58 are spherical surfaces;

The fifth lens L55 is a meniscus lens, and its image side surface S510 is concave;

The seventh lens L57 is a double-concave lens, and its image side surface S514 is a concave surface;

The eighth lens L58 is a biconvex lens, the object side S515 is convex, and both the object side S515 and the image side S516 are spherical surfaces;

The ninth lens L59 is a biconcave lens with negative refractive power and is made of glass material. The object side surface S517 is a concave surface, the image side surface S518 is a concave surface, and both the object side surface S517 and the image side surface S518 are spherical surfaces;

The tenth lens L510 is a double-convex lens with positive refractive power and is made of glass material. The object side surface S519 is a convex surface, the image side surface S520 is a convex surface, and both the object side surface S519 and the image side surface S520 are spherical surfaces;

The protective glass CG5 has a flat surface on the object side S521 and the image side S522;

Using the above-mentioned lens, aperture ST5 and a design that meets at least one of the conditions (1) to (5), the wide-angle lens 5 can effectively reduce the total length of the lens, effectively reduce the aperture value, effectively improve the resolution, and effectively Environmental temperature changes, effective correction of aberrations, effective correction of chromatic aberrations.

If the following conditions are met: 5.5<TTL/f<10. Thereby, the positive refractive power of the fifth lens L55 and the object side S59, the positive refractive power of the sixth lens L56 and the object side S512 and the image side S513, the seventh lens L57 and the object side S513, and the eighth lens L58 and the image side S516 can be strengthened. This feature effectively balances the angle of view and total length of the wide-angle lens 5. If the following conditions are met: 1.3<TTL/R ₁₁ <2.6 and 0.03<|f ₁₂ /f ₃₄ |<1.7. In this way, the combination of the central aperture can enhance the negative refractive power of the first lens L51 on the object side S51, the image side S52 and the second lens L52, and the features of the shape configuration of the object side S53 and the image side S54, thereby enhancing the miniaturization and effective control of the wide-angle lens 5 The angle of view of the lens, and helps the wide-angle lens to achieve a balance between aperture size, angle of view and total length. If the following conditions are met: 64.3>Vd ₁ >30 and 54.5>Vd ₂ >35. In this way, the achromatic function of the first lens L51 and the second lens L52 can be enhanced.

Table 9 is a table of related parameters of each lens of the wide-angle lens 5 in Figure 9.

Table 10 shows the relevant parameter values and corresponding values of the wide-angle lens 5 of the fifth embodiment The calculated values of condition (1) to condition (5) can be seen from Table 10 that the wide-angle lens 5 of the fifth embodiment can all meet the requirements of condition (1) to condition (5).

In addition, the optical performance of the wide-angle lens 5 of the fifth embodiment can also meet the requirements. It can be seen from FIG. 10A that the field curvature of the wide-angle lens 5 of the fifth embodiment is between -0.02mm and 0.03mm. It can be seen from FIG. 10B that the distortion of the wide-angle lens 5 of the fifth embodiment is between -8% and 0%. It can be seen from FIG. 10C that the lateral chromatic aberration of the wide-angle lens 5 of the fifth embodiment is between -0.3 μm and 1.6 μm. It can be seen from FIG. 10D that the relative illuminance of the wide-angle lens 5 of the fifth embodiment is between 0.69 and 1.0. It can be seen from Figure 10E that the wide-angle lens 5 of the fifth embodiment, when the image height is 0.000mm, the root mean square radius of the spot is 0.787μm, the geometric radius of the spot is 3.168μm, when the image height is 2.750 When mm, the root mean square radius of the light spot is 1.114μm, and the geometric radius of the light spot is 6.010μm. When the image height is 3.928mm, the root mean square radius of the light spot is 2.082μm, and the geometric radius of the light spot is 9.702μm. It can be seen from FIG. 10F that the value of the modulation transfer function of the wide-angle lens 5 of the fifth embodiment is between 0.59 and 1.0. It can be seen from FIG. 10G that the wide-angle lens 5 of the fifth embodiment has a modulation transfer function value between 0.0 and 0.72 when the focus shift is between -0.05 mm and 0.05 mm.

It is obvious that the curvature of field, distortion, and lateral chromatic aberration of the wide-angle lens 5 of the fifth embodiment can be effectively corrected, and the relative illuminance, lens resolution, and focal depth can also meet the requirements, thereby obtaining better optical performance.

Please refer to Figure 11. Figure 11 is the sixth example of the wide-angle lens according to the present invention. Schematic diagram of the lens configuration of the embodiment. The wide-angle lens 6 includes a first lens L61, a second lens L62, a third lens L63, a fourth lens L64, a fifth lens L65, and an Aperture ST6, a sixth lens L66, a seventh lens L67, an eighth lens L68 and a protective glass CG6. When imaging, the light from the object side is finally imaged on an imaging surface IMA6. According to [Implementation Mode] paragraphs 1 to 11, in which:

The first lens L61 has positive refractive power;

The third lens L63 is a biconcave lens with negative refractive power, the object side S65 is concave, the image side S66 is concave, and both the object side S65 and the image side S66 are spherical surfaces;

The fourth lens L64 is a biconvex lens, the object side surface S67 is a convex surface, the image side surface S68 is a convex surface, and both the object side surface S67 and the image side surface S68 are spherical surfaces;

The fifth lens L65 is a meniscus lens, and its image side surface S610 is concave;

The seventh lens L67 is a biconcave lens, and its image side surface S614 is a concave surface;

The eighth lens L68 is a double convex lens, the object side S615 is convex, and both the object side S615 and the image side S616 are aspherical surfaces;

The protective glass CG6, the object side S617 and the image side S618 are both flat;

Utilizing the above-mentioned lens, aperture ST6, and a design that meets at least one of the conditions (1) to (5), the wide-angle lens 6 can effectively reduce the total length of the lens, effectively reduce the aperture value, effectively improve the resolution, and effectively Environmental temperature changes, effective correction of aberrations, effective correction of chromatic aberrations.

If the value of condition (5) Vd ₂ is less than 35, the achromatic function is poor. Therefore, _{the value of Vd 2} must at least be greater than 35, so the best effect range is 54.5>Vd ₂ >35, and the best achromatic condition is in this range.

Table 11 is a table of related parameters of each lens of the wide-angle lens 6 in Figure 11.

The aspheric surface concavity z of the aspheric lens in Table 11 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

among them:

c: curvature;

h: the vertical distance from any point on the lens surface to the optical axis;

k: conic coefficient;

A~C: Aspheric coefficient.

Table 12 is a table of related parameters of the aspheric surface of the aspheric lens in Table 11. Among them, k is the Conic Constant, and A~C are the aspherical coefficients.

Table 13 shows the relevant parameter values of the wide-angle lens 6 of the sixth embodiment and the calculated values of the corresponding conditions (1) to (5). From Table 13 it can be seen that the wide-angle lens 6 of the sixth embodiment can all satisfy the condition (1). ) To the requirements of condition (5).

In addition, the optical performance of the wide-angle lens 6 of the sixth embodiment can also meet the requirements. It can be seen from Fig. 12A that the wide-angle lens 6 of the sixth embodiment has a field curvature between -0.02mm and 0.035mm. It can be seen from FIG. 12B that the distortion of the wide-angle lens 6 of the sixth embodiment is between -8% and 0%. It can be seen from FIG. 12C that the lateral chromatic aberration of the wide-angle lens 6 of the sixth embodiment is between -0.5 μm and 1.4 μm. It can be seen from FIG. 12D that the relative illuminance of the wide-angle lens 6 of the sixth embodiment is between 0.60 and 1.0. It can be seen from Figure 12E that the wide-angle lens 6 of the sixth embodiment, when the image height is 0.000mm, the root mean square radius of the spot is 1.052μm, the geometric radius of the spot is 3.992μm, and when the image height is 2.750 When mm, the root mean square radius of the spot is 1.153μm, and the geometric radius of the spot is 6.678μm. When the image height is 3.923mm, the root mean square radius of the spot is 1.821μm, and the geometric radius of the spot is 10.259μm. It can be seen from FIG. 12F that the value of the modulation transfer function of the wide-angle lens 6 of the sixth embodiment is between 0.56 and 1.0. It can be seen from Figure 12G that the wide-angle lens 6 of the sixth embodiment, when the focus shift is between -0.05mm to 0.05mm The value of the modulation transfer function is between 0.0 and 0.72.

It is obvious that the curvature of field, distortion, and lateral chromatic aberration of the wide-angle lens 6 of the sixth embodiment can be effectively corrected, and the relative illuminance, lens resolution, and focal depth can also meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 13, which is a schematic diagram of the lens configuration of the seventh embodiment of the wide-angle lens according to the present invention. The wide-angle lens 7 includes a first lens L71, a second lens L72, a third lens L73, a fourth lens L74, an aperture ST7, and a fifth lens in order from an object side to an image side along an optical axis OA7. Lens L75, a sixth lens L76, a seventh lens L77, an eighth lens L78, a ninth lens L79, a filter OF7 and a protective glass CG7. When imaging, the light from the object side is finally imaged on an imaging surface IMA7. According to [Implementation Mode] paragraphs 1 to 11, in which:

The first lens L71 has negative refractive power;

The third lens L73 is a meniscus lens with positive refractive power, the object side S75 is concave, the image side S76 is convex, and both the object side S75 and the image side S76 are aspherical surfaces;

The fourth lens L74 is a meniscus lens, the object side S77 is convex, the image side S78 is concave, and both the object side S77 and the image side S78 are aspherical surfaces;

The fifth lens L75 is a double convex lens, and the image side surface S711 is convex;

The seventh lens L77 is a biconcave lens, and its image side surface S714 is a concave surface;

The eighth lens L78 is a meniscus lens, the object side S715 is concave, and both the object side S715 and the image side S716 are aspherical surfaces;

The ninth lens L79 is a meniscus lens with negative refractive power and is made of glass. The object side S717 is concave, the image side S718 is convex, the object side S717 and the image side S718 are convex. All are spherical surfaces;

The object side S719 and the image side S720 of the filter OF7 are both flat surfaces;

The protective glass CG7, the object side S721 and the image side S722 are both flat surfaces;

Using the above lens, aperture ST7, and a design that meets at least one of the conditions (1) to (5), the wide-angle lens 7 can effectively reduce the total length of the lens, effectively reduce the aperture value, effectively improve the resolution, and effectively Environmental temperature changes, effective correction of aberrations, effective correction of chromatic aberrations.

Table 14 is a table of related parameters of each lens of the wide-angle lens 7 in Figure 13.

The aspheric surface concavity z of the aspheric lens in Table 14 is as defined in the sixth embodiment. Table 15 is a table of related parameters of the aspheric surface of the aspheric lens in Table 14. The definitions of the correlation coefficients are the same as those of the sixth embodiment, and will not be repeated here.

Table 16 shows the relevant parameter values of the wide-angle lens 7 of the seventh embodiment and the calculated values of the corresponding conditions (1) to (5). From Table 16, it can be seen that the wide-angle lens 7 of the seventh embodiment can all satisfy the condition (1). ) To the requirements of condition (5).

In addition, the optical performance of the wide-angle lens 7 of the seventh embodiment can also meet the requirements. It can be seen from Fig. 14A that the wide-angle lens 7 of the seventh embodiment has a longitudinal aberration between -0.015 mm and 0.03 mm. It can be seen from FIG. 14B that the field curvature of the wide-angle lens 7 of the seventh embodiment is between -0.04 mm and 0.06 mm. It can be seen from FIG. 14C that the distortion of the wide-angle lens 7 of the seventh embodiment is between -80% and 0%. It can be seen from FIG. 14D that the wide-angle lens 7 of the seventh embodiment has a lateral chromatic aberration between 0 μm and 4.0 μm. It can be seen from FIG. 14E that the value of the modulation transfer function of the wide-angle lens 7 of the seventh embodiment is between 0.48 and 1.0.

Obviously, the longitudinal aberration, curvature of field, distortion, and lateral aberration of the wide-angle lens 7 of the seventh embodiment The chromatic aberration can be effectively corrected, and the lens resolution can also meet the requirements, so as to obtain better optical performance.

Please refer to FIG. 15. FIG. 15 is a schematic diagram of the lens configuration of the eighth embodiment of the wide-angle lens according to the present invention. The wide-angle lens 8 includes a first lens L81, a second lens L82, a third lens L83, a fourth lens L84, an aperture ST8, and a fifth lens in order from an object side to an image side along an optical axis OA8. Lens L85, a sixth lens L86, a seventh lens L87, an eighth lens L88, a ninth lens L89, a filter OF8 and a protective glass CG8. When imaging, the light from the object side is finally imaged on an imaging surface IMA8. According to [Implementation Mode] paragraphs 1 to 11, in which:

The first lens L81 has negative refractive power;

The third lens L83 is a meniscus lens with positive refractive power, the object side S85 is concave, the image side S86 is convex, and both the object side S85 and the image side S86 are aspherical surfaces;

The fourth lens L84 is a meniscus lens, the object side S87 is convex, the image side S88 is concave, and both the object side S87 and the image side S88 are aspherical surfaces;

The fifth lens L85 is a double convex lens, and its image side surface S811 is a convex surface;

The seventh lens L87 is a meniscus lens, and its image side surface S814 is convex;

The eighth lens L88 is a meniscus lens, the object side S815 is concave, and both the object side S815 and the image side S816 are aspherical surfaces;

The ninth lens L89 is a meniscus lens with negative refractive power and is made of glass. Its object side S817 is concave, image side S818 is convex, and both object side S817 and image side S818 are spherical surfaces;

The object side S819 and the image side S820 of the filter OF8 are both flat surfaces;

The protective glass CG8, the object side S821 and the image side S822 are both flat surfaces;

Utilizing the above-mentioned lens, the aperture ST8 and the design satisfying at least one of the conditions (1) to (5), the wide-angle lens 8 can effectively reduce the total length of the lens, effectively reduce the aperture value, effectively improve the resolution, and effectively Environmental temperature changes, effective correction of aberrations, effective correction of chromatic aberrations.

Table 17 is a table of related parameters of each lens of the wide-angle lens 8 in Figure 15.

The aspheric surface concavity z of the aspheric lens in Table 17 is as defined in the sixth embodiment. Table 18 is a table of related parameters of the aspheric surface of the aspheric lens in Table 17, and the relationship is The definitions of the numbers are the same as in the sixth embodiment, and will not be repeated here.

Table 19 shows the relevant parameter values of the wide-angle lens 8 of the eighth embodiment and the calculated values of the corresponding conditions (1) to (5). From Table 19, it can be seen that the wide-angle lens 8 of the eighth embodiment can all satisfy the condition (1). ) To the requirements of condition (5).

In addition, the optical performance of the wide-angle lens 8 of the eighth embodiment can also meet the requirements. It can be seen from FIG. 16A that the wide-angle lens 8 of the eighth embodiment has a longitudinal aberration between -0.01 mm and 0.025 mm. It can be seen from FIG. 16B that the field curvature of the wide-angle lens 8 of the eighth embodiment is between -0.04mm and 0.06mm. It can be seen from FIG. 16C that the distortion of the wide-angle lens 8 of the eighth embodiment is between -80% and 0%. It can be seen from FIG. 16D that the lateral chromatic aberration of the wide-angle lens 8 of the eighth embodiment is between 0 μm and 3.5 μm. It can be seen from FIG. 16E that the value of the modulation transfer function of the wide-angle lens 8 of the eighth embodiment is between 0.49 and 1.0.

It is obvious that the longitudinal aberration, curvature of field, distortion, and lateral chromatic aberration of the wide-angle lens 8 of the eighth embodiment can be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 17, which is a schematic diagram of the lens configuration of the ninth embodiment of the wide-angle lens according to the present invention. The wide-angle lens 9 includes a first lens L91, a second lens L92, a third lens L93, a fourth lens L94, an aperture ST9, and a fifth lens in order from an object side to an image side along an optical axis OA9. Lens L95, a sixth lens L96, a seventh lens L97, an eighth lens L98, a ninth lens L99, a filter OF9 and a protective glass CG9. When imaging, the light from the object side is finally imaged on an imaging surface IMA9. According to [Implementation Mode] paragraphs 1 to 11, in which:

The first lens L91 has negative refractive power;

The third lens L93 is a meniscus lens with positive refractive power, the object side S95 is concave, the image side S96 is convex, and both the object side S95 and the image side S96 are aspherical surfaces;

The fourth lens L94 is a meniscus lens, the object side S97 is convex, the image side S98 is concave, and both the object side S97 and the image side S98 are aspherical surfaces;

The fifth lens L95 is a double convex lens, and the image side surface S911 is convex;

The seventh lens L97 is a meniscus lens, and its image side surface S914 is convex;

The eighth lens L98 is a meniscus lens, the object side S915 is concave, and both the object side S915 and the image side S916 are aspherical surfaces;

The ninth lens L99 is a meniscus lens with negative refractive power and is made of glass material. The object side surface S917 is a concave surface, the image side surface S918 is a convex surface, and both the object side surface S917 and the image side surface S918 are spherical surfaces;

The object side S919 and the image side S920 of the filter OF9 are both flat surfaces;

The protective glass CG9, the object side S921 and the image side S922 are both flat;

Use the above lens, the aperture ST9 and at least satisfy the conditions (1) to (5) among them A conditional design enables the wide-angle lens 9 to effectively reduce the total length of the lens, effectively reduce the aperture value, effectively increase the resolution, effectively resist environmental temperature changes, effectively correct aberrations, and effectively correct chromatic aberrations.

Table 20 is a table of related parameters of each lens of the wide-angle lens 9 in Figure 17.

The aspheric surface concavity z of the aspheric lens in Table 20 is as defined in the sixth embodiment. Table 21 is a table of related parameters of the aspheric surface of the aspheric lens in Table 20. The definitions of the correlation coefficients are the same as those of the sixth embodiment, and will not be repeated here.

Table 22 shows the relevant parameter values of the wide-angle lens 9 of the ninth embodiment and the calculated values corresponding to conditions (1) to (5). From Table 22, it can be seen that the wide-angle lens 9 of the ninth embodiment can all meet the conditions (1) to the requirements of condition (5).

In addition, the optical performance of the wide-angle lens 9 of the ninth embodiment can also meet the requirements. It can be seen from FIG. 18A that the wide-angle lens 9 of the ninth embodiment has a longitudinal aberration between -0.01 mm and 0.03 mm. It can be seen from FIG. 18B that the field curvature of the wide-angle lens 9 of the ninth embodiment is between -0.04 mm and 0.13 mm. It can be seen from FIG. 18C that the distortion of the wide-angle lens 9 of the ninth embodiment is between -80% and 0%. It can be seen from FIG. 18D that the lateral chromatic aberration of the wide-angle lens 9 of the ninth embodiment is between 0.5 μm and 4.0 μm. It can be seen from FIG. 18E that the value of the modulation transfer function of the wide-angle lens 9 of the ninth embodiment is between 0.40 and 1.0.

It is obvious that the longitudinal aberration, curvature of field, distortion, and lateral chromatic aberration of the wide-angle lens 9 of the ninth 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 in the above embodiments, it is not intended to limit the present invention. Obviously, anyone who is familiar with this technique can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to those defined by the appended patent scope.

6‧‧‧Wide-angle lens

L61‧‧‧First lens

L62‧‧‧Second lens

L63‧‧‧Third lens

L64‧‧‧Fourth lens

L65‧‧‧Fifth lens

L66‧‧‧Sixth lens

L67‧‧‧Seventh lens

L68‧‧‧Eighth lens

ST6‧‧‧Aperture

OA6‧‧‧Optical axis

CG6‧‧‧Protection glass

IMA6‧‧‧Image surface

S61‧‧‧Object side of the first lens

S62‧‧‧The side of the first lens image

S63‧‧‧Second lens object side

S64‧‧‧Second lens image side

S65‧‧‧Third lens object side

S66‧‧‧Third lens image side

S67‧‧‧Fourth lens object side

S68‧‧‧Fourth lens image side

S69‧‧‧Fifth lens object side

S610‧‧‧Fifth lens image side

S611‧‧‧Aperture surface

S612‧‧‧Sixth lens object side

S613‧‧‧Sixth lens image side (7th lens object side)

S614‧‧‧Seventh lens image side

S615‧‧‧The eighth lens object side

S616‧‧‧Eighth lens image side

S617‧‧‧Protect the side of the glass object

S618‧‧‧Protect the side of the glass image

Claims (12)

A wide-angle lens comprising: a first lens with refractive power, the first lens including a convex surface facing an object side; a second lens with negative refractive power, the second lens including a convex surface facing the object side and a concave surface facing an image side ; A third lens with refractive power; a fourth lens with positive refractive power; a fifth lens with positive refractive power, the fifth lens including a convex surface facing an object side; a sixth lens with positive refractive power; a seventh lens with negative Refractive power, the seventh lens includes a concave surface facing the object side; and an eighth lens has positive refractive power; wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the The sixth lens, the seventh lens, and the eighth lens are arranged in order from the object side to the image side along an optical axis, and the relative positions of the lenses are fixed; wherein the wide-angle lens satisfies the following condition: 5.5<TTL /f<10; where TTL is a distance from an object side of the first lens to an imaging surface on the optical axis, and f is an effective focal length of the wide-angle lens. A wide-angle lens comprising: a first lens with refractive power, the first lens including a convex surface facing an object side; a second lens with negative refractive power, the second lens including a convex surface facing the object side and a concave surface facing an image side ； A third lens has refractive power; a fourth lens has positive refractive power; a fifth lens has positive refractive power, and the fifth lens includes a convex surface facing an object side; a sixth lens has positive refractive power; a seventh lens has negative refractive power , The seventh lens includes a concave surface facing the object side; and an eighth lens has positive refractive power; wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the first lens The six lenses, the seventh lens, and the eighth lens are arranged in order from the object side to the image side along an optical axis, and the relative positions of the lenses are fixed; wherein the sixth lens and the seventh lens are cemented The wide-angle lens satisfies the following conditions: 5.5<TTL/f<10; wherein, TTL is a distance between an object side of the first lens and an imaging surface on the optical axis, and f is an effective focal length of the wide-angle lens. A wide-angle lens comprising: a first lens with positive refractive power, the first lens including a convex surface facing an object side; a second lens with negative refractive power, the second lens including a convex surface facing the object side and a concave surface facing an image Side; a third lens with refractive power; a fourth lens with positive refractive power; a fifth lens with positive refractive power, the fifth lens including a convex surface facing an object side; a sixth lens with positive refractive power; A seventh lens has negative refractive power, the seventh lens includes a concave surface facing the object side; and an eighth lens has positive refractive power; wherein the first lens, the second lens, the third lens, the fourth lens, The fifth lens, the sixth lens, the seventh lens, and the eighth lens are arranged in order from the object side to the image side along an optical axis, and the relative positions of the lenses are fixed. A wide-angle lens comprising: a first lens with refractive power, the first lens including a convex surface facing an object side; a second lens with negative refractive power, the second lens including a convex surface facing the object side and a concave surface facing an image side A third lens has positive refractive power; a fourth lens has positive refractive power; a fifth lens has positive refractive power, and the fifth lens includes a convex surface facing an object side; a sixth lens has positive refractive power; a seventh lens has Negative refractive power, the seventh lens includes a concave surface facing the object side; and an eighth lens has positive refractive power; wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, The sixth lens, the seventh lens, and the eighth lens are arranged in order from the object side to the image side along an optical axis, and the relative positions of the lenses are fixed. For example, the wide-angle lens described in any one of claims 1 to 4 of the scope of patent application further includes a ninth lens disposed between the seventh lens and the image side. The wide-angle lens described in item 5 of the scope of patent application, wherein the ninth lens has a negative refractive power, and the ninth lens includes a concave surface facing the object side. The wide-angle lens described in any one of claims 1 to 3 of the scope of the patent application further includes a tenth lens disposed between the seventh lens and the image side. The wide-angle lens described in item 7 of the scope of patent application, wherein the tenth lens has a positive refractive power, and the tenth lens includes a convex surface facing the object side and another convex surface facing the image side. The wide-angle lens according to any one of claims 1 to 3 in the scope of the patent application, wherein: the first lens has positive refractive power; the third lens has negative refractive power, and the third lens includes a concave surface facing the image side The fourth lens includes a convex surface facing the image side; and the eighth lens includes a convex surface facing the object side. The wide-angle lens described in item 1, item 2, or item 4 of the scope of patent application, wherein: the first lens has negative refractive power; the third lens has positive refractive power; at least one of the third lens and the eighth lens The object-side surface of one is concave; the image-side surface of at least one of the third lens and the fifth lens is convex; and the fourth lens includes a convex surface facing the object side and a concave surface facing the image side. The wide-angle lens according to any one of claims 1 to 4 in the scope of the patent application, wherein: the first lens further includes a concave surface facing the image side; and the sixth lens includes a convex surface facing the object side and another A convex surface faces the image side. For the wide-angle lens described in any of the claims 1 to 4 in the scope of the patent application, the wide-angle lens meets at least one of the following conditions: 1.3<TTL/R ₁₁ <2.6;0.03<|f ₁₂ /f ₃₄ | <1.7;64.3>Vd ₁ >30;54.5>Vd ₂ >35; where f _{12 is} the combined effective focal length of one of the first lens and the second lens, and f _{34 is} the difference between the third lens and the fourth lens A combined effective focal length, R _{11 is a} radius of curvature of an object side surface of the first lens, TTL is a distance between the object side surface of the first lens and an imaging surface on the optical axis, and Vd _{1 is} the first lens One of the Abbe coefficients of the lens, and Vd _{2 is} one of the Abbe coefficients of the second lens.

Images