TWI704387B - Lens assembly - Google Patents

Abstract

A lens assembly includes a first lens, a second lens, a third lens, a fourth lens, and a reflective element. The first lens is with positive refractive power and includes a concave surface facing an object side and a convex surface facing an image side. The second lens is with negative refractive power and includes a concave surface facing the object side. The third lens is with positive refractive power. The fourth lens is with refractive power and includes a concave surface facing the image side. The reflective element includes a reflective surface. The first lens, the second lens, the third lens, and the fourth lens are arranged in order from the object side to the image side along an optical axis. The reflective element is disposed between the first lens and the fourth lens. The lens assembly satisfies the following condition: TTL/f > 1.2; wherein TTL is a total track length of the lens assembly and f is an effective focal length of the lens assembly.

Description

Imaging lens (44)

The invention relates to an imaging lens.

Nowadays, the development trend of mobile phone imaging lenses is constantly moving toward high resolution. The number of lenses used in imaging lenses is increasing, making the total length of imaging lenses longer and longer, which can no longer meet the needs of thin and light mobile phones. There is another imaging lens with a new architecture that can simultaneously meet the needs of high resolution and miniaturization.

In view of this, the main purpose of the present invention is to provide an imaging lens that has a shorter overall lens length and higher resolution, but still has good optical performance.

The imaging lens of the present invention includes a first lens, a second lens, a third lens, a fourth lens and a reflective element. The first lens has positive refractive power. The first lens includes a concave surface facing an object side and a convex surface facing an image side. The second lens has negative refractive power, and the second lens includes a concave surface facing the object side. The third lens has positive refractive power. The fourth lens has refractive power, and the fourth lens includes a concave surface facing the image side. The reflective element includes a reflective surface. The first lens, the second lens, the third lens and the fourth lens are arranged in order from the object side to the image side along an optical axis. The reflective element is arranged between the first lens and the fourth lens. The imaging lens satisfies the following conditions: TTL/f>1.2; where TTL is the total length of the optical system of one of the imaging lenses, and f is the effective focal length of one of the imaging lenses.

Another imaging lens of the present invention includes a first lens, a second lens, a third lens, a fourth lens, and a reflective element. The first lens has positive refractive power, and the first lens includes a convex surface facing an image side. The second lens has negative refractive power, and the second lens includes a concave surface facing an object side. The third lens has positive refractive power. The fourth lens has refractive power, and the fourth lens includes a concave surface facing the image side. The reflective element includes a reflective surface. The first lens, the second lens, the third lens and the fourth lens are arranged in order from the object side to the image side along an optical axis. The reflective element is arranged between the first lens and the fourth lens. The imaging lens satisfies the following conditions: 2mm<L<6mm; where L is the distance from an object side of the lens closest to the object side to the reflecting surface on the optical axis.

The second lens may further include another concave surface facing the image side.

The third lens includes a convex surface facing the object side and another convex surface facing the image side; the fourth lens may further include a convex surface facing the object side.

It may further include a fifth lens disposed between the third lens and the fourth lens, the fourth lens having positive refractive power, the fifth lens having positive refractive power, and the fifth lens including a convex surface facing the image side.

It may further include a sixth lens arranged between the third lens and the fifth lens. The sixth lens has a negative refractive power. The sixth lens includes a concave surface facing the object side and a convex surface facing the image side.

The imaging lens satisfies the following conditions: 5mm<ALOD<14mm; 0<TTL/ALOD<2; Among them, ALOD is the sum of the optical effective diameters of the object side of each lens of the imaging lens, and TTL is the total length of the optical system of one of the imaging lenses .

The imaging lens meets the following conditions: 1<(TTL+f)/f _obj1 <5;-1<f _obj3 /f _obj4 <2;1<f _obj1 /L1T<4; among them, TTL is one of the optical systems of the imaging lens Total length, f is an effective focal length of the imaging lens, f _obj1 is an effective focal length of the lens closest to the object side, f _obj3 is an effective focal length of the third lens closest to the object side, f _obj4 is the fourth lens _closest to the object side One of the effective focal lengths of the lens, L1T is a thickness of the first lens along the optical axis.

The imaging lens satisfies the following conditions: 0.2mm ² <L1T×L1SD<2.2mm ² ; -4mm ² <L1T×R ₁₁ <0mm ² ; where L1T is the thickness of the first lens along the optical axis, and L1SD is the first An optical effective radius of an image side surface of the lens, and R ₁₁ is a curvature radius of an object side surface of the first lens.

The imaging lens satisfies the following conditions: 0.5<M1T/L1T<4; 1<TTL/L<5; 0<L/f<2.5; among them, M1T is the distance from the image side of the first lens to the reflecting surface on the optical axis A distance, L1T is the thickness of the first lens along the optical axis, TTL is the total length of an optical system of the imaging lens, L is the distance from the object side of the lens closest to the object side to the reflecting surface on the optical axis, f is one of the effective focal lengths of the imaging lens.

The imaging lens meets the following conditions: -2mm<8×M1T-(OD ₂ +OD ₃ +OD ₄ +OD ₅ )<1mm; among them, M1T is one of the image side of the first lens to one of the reflecting surface on the optical axis Pitch, OD ₂ is the optical effective diameter of the second lens near the object side, OD ₃ is the optical effective diameter of the third lens near the object side, OD ₄ is the fourth lens near the object side An optical effective diameter of an object side of the lens, OD ₅ is an optical effective diameter of an object side of the fifth lens close to the object side.

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, 5, 6, 7, 8, 9: imaging lens

ST1, ST2, ST3, ST4, ST5, ST6, ST7, ST8, ST9: aperture

L11, L21, L31, L41, L51, L61, L71, L81, L91: the first lens

L12, L22, L32, L42, L52, L62, L72, L82, L92: second lens

L13, L23, L33, L43, L53, L63, L73, L83, L93: third lens

P1, P2, P3, P4, P5, P6, P7, P8, P9: reflective elements

L14, L24, L34, L44, L54, L64, L74, L84, L94: fourth lens

L15, L45, L55, L85, L95: fifth lens

L96: sixth lens

OF1, OF2, OF3, OF4, OF5, OF6, OF7, OF8, OF9: filter

IMA1, IMA2, IMA3, IMA4, IMA5, IMA6, IMA7, IMA8, IMA9: imaging surface

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

S11, S21, S31, S41, S51, S61, S71, S81, S91: aperture surface

S14, S22, S32, S42, S52, S62, S72, S82, S92: the first lens object side

S15, S23, S33, S43, S53, S63, S73, S83, S93: the side of the first lens image

S16, S24, S34, S44, S54, S67, S77, S87, S97: second lens object side

S17, S25, S35, S45, S55, S68, S78, S88, S98: second lens image side

S18, S26, S36, S46, S56, S69, S79, S89, S99: third lens object side

S19, S27, S37, S47, S57, S610, S710, S810, S910: third lens image side

S110, S28, S38, S48, S58, S64, S74, S84, S94: incident surface

S111, S29, S39, S49, S59, S65, S75, S85, S95: reflective surface

S112, S210, S310, S410, S510, S66, S76, S86, S96: exit surface

S113, S211, S311, S411, S513, S611, S711, S813, S915: fourth lens object side

S114, S212, S312, S412, S514, S612, S712, S814, S916: Fourth lens image side

S12, S413, S511, S811, S913: fifth lens object side

S13, S414, S512, S812, S914: fifth lens image side

S911: sixth lens object side

S912: Sixth lens image side

S115, S213, S313, S415, S515, S613, S713, S815, S917: side of the filter object

S116, S214, S314, S416, S516, S614, S714, S816, S918: Filter image side

FIG. 1 is a schematic diagram of the lens configuration and optical path of the first embodiment of the imaging lens according to the present invention.

FIG. 2A is a field curve diagram of the first embodiment of the imaging lens according to the present invention.

FIG. 2B is a distortion diagram of the first embodiment of the imaging lens according to the present invention.

Figure 2C is a diagram of Modulation Transfer Function of the first embodiment of the imaging lens according to the present invention.

FIG. 3 is a schematic diagram of the lens configuration and optical path of the second embodiment of the imaging lens according to the present invention.

Fig. 4A is a field curvature diagram of the second embodiment of the imaging lens according to the present invention.

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

Figure 4C is a diagram of the modulation transfer function of the second embodiment of the imaging lens according to the present invention.

FIG. 5 is a schematic diagram of the lens configuration and optical path of the third embodiment of the imaging lens according to the present invention.

Fig. 6A is a field curvature diagram of the third embodiment of the imaging lens according to the present invention.

FIG. 6B is a distortion diagram of the third embodiment of the imaging lens according to the present invention.

Figure 6C is a diagram of the modulation transfer function of the third embodiment of the imaging lens according to the present invention.

FIG. 7 is a schematic diagram of the lens configuration and optical path of the fourth embodiment of the imaging lens according to the present invention.

Fig. 8A is a field curvature diagram of the fourth embodiment of the imaging lens according to the present invention.

Fig. 8B is a distortion diagram of the fourth embodiment of the imaging lens according to the present invention.

Fig. 8C is a diagram of the modulation transfer function of the fourth embodiment of the imaging lens according to the present invention.

FIG. 9 is a schematic diagram of the lens configuration and optical path of the fifth embodiment of the imaging lens according to the present invention.

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

Fig. 10B is a distortion diagram of the fifth embodiment of the imaging lens according to the present invention.

Figure 10C is a diagram of the modulation transfer function of the fifth embodiment of the imaging lens according to the present invention.

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

Figure 12A is a field curvature diagram of the sixth embodiment of the imaging lens according to the present invention.

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

Figure 12C is a diagram of the modulation transfer function of the sixth embodiment of the imaging lens according to the present invention.

FIG. 13 is a schematic diagram of the lens configuration of the seventh embodiment of the imaging lens according to the present invention.

Fig. 14A is a field curvature diagram of the seventh embodiment of the imaging lens according to the present invention.

Fig. 14B is a distortion diagram of the seventh embodiment of the imaging lens according to the present invention.

Figure 14C is a diagram of the modulation transfer function of the seventh embodiment of the imaging lens according to the present invention.

FIG. 15 is a schematic diagram of the lens arrangement and optical path of the eighth embodiment of the imaging lens according to the present invention.

Fig. 16A is a field curvature diagram of the eighth embodiment of the imaging lens according to the present invention.

Figure 16B is a distortion diagram of the eighth embodiment of the imaging lens according to the present invention.

Figure 16C is a diagram of the modulation transfer function of the eighth embodiment of the imaging lens according to the present invention.

FIG. 17 is a schematic diagram of the lens configuration and optical path of the ninth embodiment of the imaging lens according to the present invention.

Fig. 18A is a field curvature diagram of the ninth embodiment of the imaging lens according to the present invention.

Figure 18B is a distortion diagram of the ninth embodiment of the imaging lens according to the present invention.

Figure 18C is a diagram of the modulation transfer function of the ninth embodiment of the imaging lens according to the present invention.

The present invention provides an imaging lens, including: a first lens having positive refractive power, the first lens including a concave surface facing an object side and a convex surface facing an image side; a second lens having a negative refractive power, the second lens including a The concave surface faces the object side; a third lens has positive refractive power; a fourth lens has refractive power, the fourth lens includes a concave surface facing the image side; and a reflective element, the reflective element includes a reflective surface; wherein the first lens and the second lens The two lenses, the third lens and the fourth lens are arranged in order from the object side to the image side along an optical axis; the reflective element is arranged between the first lens and the fourth lens; the imaging lens meets the following conditions: TTL/f>1.2 ; Among them, TTL is the total length of the optical system of one of the imaging lenses, and f is the effective focal length of one of the imaging lenses.

The present invention provides another imaging lens, including: a first lens having a positive refractive power, the first lens including a convex surface facing an image side; a second lens having a negative refractive power, the second lens including a concave surface facing an object side; A third lens has positive refractive power; a fourth lens has refractive power, the fourth lens includes a concave surface facing the image side; and a reflective element, the reflective element includes a reflective surface; wherein the first lens, the second lens, and the third lens The lens and the fourth lens are arranged in sequence from the object side to the image side along an optical axis; the reflective element is arranged between the first lens and the fourth lens; the imaging lens meets the following conditions: 2mm<L<6mm; where L is A distance from the object side of the lens closest to the object side to the reflecting surface on the optical axis.

Please refer to Table 1, Table 2, Table 4, Table 5, Table 7, Table 8, Table 10, Table 11, Table 13, Table 14, Table 16, Table 17, Table 19, Table 2 10. Table 22, Table 23, Table 25 and Table 26, of which Table 1, Table 4, Table 7, Table 10, Table 13, Table 16, Table 19, Table 20 The second and the twenty-fifth table are respectively the first imaging lens according to the present invention The related parameter table of each lens of the first to the ninth embodiments, Table 2, Table 5, Table 8, Table 11, Table 14, Table 17, Table 20, Table 23 and Table 26 Table 1, Table 4, Table 7, Table 10, Table 13, Table 16, Table 19, Table 22, and Table 25 are the relevant parameters of the aspheric surface of the aspheric lens.

Figures 1, 3, 5, 7, 9, 11, 13, 15, and 17 are the lens configurations of the first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth embodiments of the imaging lens of the present invention, respectively And a schematic diagram of the optical path, where the first lens L11, L21, L31, L41, L51, L61, L71, L81, L91 has positive refractive power and is made of glass or plastic material, like the side surface S15, S23, S33, S43, S53, S63, S73, S83, and S93 are convex surfaces, the object side surface S14, S22, S32, S42, S52, S62, S72, S82, S92 and the image side surface S15, S23, S33, S43, S53, S63, S73, S83, S93 are all It is an aspheric surface.

The second lens L12, L22, L32, L42, L52, L62, L72, L82, L92 has negative refractive power and is made of glass or plastic material. Its object sides are S16, S24, S34, S44, S54, S67, S77, S87 , S97 is a concave surface, the object side surface S16, S24, S34, S44, S54, S67, S77, S87, S97 and the image side surface S17, S25, S35, S45, S55, S68, S78, S88, S98 are all aspherical surfaces.

The third lens L13, L23, L33, L43, L53, L63, L73, L83, L93 has positive refractive power and is made of glass or plastic material. Its object sides are S18, S26, S36, S46, S56, S69, S79, S89 , S99 is a convex surface, and the object side surface S18, S26, S36, S46, S56, S69, S79, S89, S99 are aspherical surfaces.

The fourth lens L14, L24, L34, L44, L54, L64, L74, L84, L94 has refractive power and is made of glass or plastic material, like the sides S114, S212, S312, S412, S514, S612, S712, S814, and S916 are concave surfaces, and the side surfaces S114, S212, S312, S412, S514, S612, S712, S814, and S916 are aspherical surfaces.

The reflective elements P1, P2, P3, P4, P5, P6, P7, P8, P9 are made of glass or plastic materials, and the incident surfaces S110, S28, S38, S48, S58, S64, S74, S84, and S94 are planes. The reflecting surfaces S111, S29, S39, S49, S59, S65, S75, S85, and S95 are flat surfaces, and the exit surfaces S112, S210, S310, S410, S510, S66, S76, S86, and S96 are flat surfaces. The reflective element can be a mirror or a mirror.

In addition, imaging lenses 1, 2, 3, 4, 5, 6, 7, 8, and 9 meet at least one of the following conditions: TTL/f>1.2 (1)

2mm<L<6mm (2)

5<TTL/OD ₁ <14 (3)

0.5<ID ₁ /OD ₁ <1.5 (4)

5mm<ALOD<14mm (5)

0<TTL/ALOD<2 (6)

1<ALOD/f<4 (7)

1<(TTL+f)/f _obj1 <5 (8)

|f _obj1 |+|f _obj2 |<|f _obj4 | (9)

-3mm<f _obj3 <0mm (10)

|f _obj4 |<|f _obj5 | (11)

FPD _max <4mm (12)

-1<f _obj3 /f _obj4 <2 (13)

1<f _obj1 /L1T<4 (14)

0.2mm ² <L1T×L1SD<2.2mm ² (15)

-4mm ² <L1T×R ₁₁ <0mm ² (16)

0.5<M1T/L1T<4 (17)

1<TTL/L<5 (18)

0<L/f<2.5 (19)

-2mm<8×M1T-(OD ₂ +OD ₃ +OD ₄ +OD ₅ )<1mm (20)

Among them, TTL is the total length of the optical system of one of the imaging lenses 1, 2, 3, 4, 5, 6, 7, 8, 9 in the first embodiment to the ninth embodiment, that is, the apertures ST1, ST2, ST3, ST4 , ST5, ST6, ST7, ST8, ST9 to imaging surface IMA1, IMA2, IMA3, IMA4, IMA5, IMA6, IMA7, IMA8, IMA9 on optical axis OA1, OA2, OA3, OA4, OA5, OA6, OA7, OA8, OA9 The first pitch, f is the effective focal length of one of the imaging lenses 1, 2, 3, 4, 5, 6, 7, 8, and 9 in the first embodiment to the ninth embodiment, and L is the first embodiment to the first embodiment In the nine embodiments, the lens L15, L21, L31, L41, L51, L61, L71, L81, L91 is one of the object sides S12, S22, S32, S42, S52, S62, S72, S82, S92 to Reflecting surfaces S111, S29, S39, S49, S59, S65, S75, S85, S95 are at a pitch on the optical axis OA1, OA2, OA3, OA4, OA5, OA6, OA7, OA8, OA9, OD ₁ is the first implementation In the example to the fifth embodiment, the lens L15, L21, L31, L41, L51 and one of the object sides S12, S22, S32, S42, S52 closest to the object side have an optical effective diameter, and OD ₂ is the eighth embodiment to In the ninth embodiment, one of the object sides S87, S97 of the second lens L82, L92 close to the object side is an optical effective diameter, and OD ₃ is the third lens close to the object side in the eighth embodiment to the ninth embodiment One of the object sides of L83, L93, S89, S99, and one of the optical effective diameters, OD ₄ is one of the lens L85, L96 and one of the object sides S811, S911 in the eighth embodiment to the ninth embodiment. Effective diameter, OD ₅ is the optical effective diameter of one of the object sides S813, S913 of the fifth lens L84, L95 near the object side in the eighth embodiment to the ninth embodiment, and ID ₁ is the first embodiment to the fifth embodiment In the embodiment, one of the lenses L15, L21, L31, L41, and L51 closest to the object side has an optical effective diameter of one of the side surfaces S13, S23, S33, S43, S53, and ALOD is the first embodiment to the ninth embodiment, respectively In, the total optical effective diameter of the object side of each lens, f _obj1 is the lens L15, L21, L31, L41, L51, L61, L71, L81, the lens closest to the object side in the first to the ninth embodiments The effective focal length of L91, that is, the effective focal length of the first lens is arranged in order from the object side along the optical axis, f _obj2 is the second lens L11, L22 near the object side in the first embodiment to the fifth embodiment , L32, L42, L52, one of the effective focal lengths, that is, one of the effective focal lengths of the second lens arranged in order from the object side along the optical axis, f _{ob j3} is the effective focal length of one of the lenses L12, L63, L73, L83, and L93 on the third object side in the first, sixth to ninth embodiments, that is, they are arranged in order from the object side along the optical axis. One of the effective focal lengths of the third lens, f _obj4 is one of the fourth lenses L13, L24, L34, L44, L55, L64, L74, L85, L96 in the first embodiment to the ninth embodiment. Focal length, that is, one of the effective focal lengths of the fourth lens arranged in order from the object side along the optical axis, f _obj5 is one of the effective focal lengths of the fifth lens L14 near the object side in the first embodiment, that is, from the object side along the light The axes are arranged in order as one of the effective focal lengths of the fifth lens. FPD _max is the maximum optical effective diameter of one of the lenses with the reflective elements P1, P2, P3, P4, and P5 facing the object side. L1T is the sixth embodiment to the ninth embodiment. In the example, the first lenses L61, L71, L81, and L91 are respectively along the optical axis OA6, OA7, OA8, OA9. M1T is the sixth embodiment to the ninth embodiment, the first lens L61, L71, L81 , L91 image side S63, S73, S83, S93 to the reflecting surface S65, S75, S85, S95 along the optical axis OA6, OA7, OA8, OA9 one of the distances, L1SD is the sixth embodiment to the ninth embodiment , The first lens L61, L71, L81, L91 is one of the image side surfaces S63, S73, S83, S93 (Effective Optical Semi-Diameter), R ₁₁ is the sixth embodiment to the ninth embodiment, the first One of the radius of curvature of the object side surfaces S62, S72, S82, S92 of the lenses L61, L71, L81, and L91. The imaging lens 1, 2, 3, 4, 5, 6, 7, 8, 9 can effectively reduce the total length of the lens, effectively improve the resolution, effectively correct aberrations, and effectively correct chromatic aberration.

The first embodiment of the imaging lens of the present invention will now be described in detail. Please refer to FIG. 1, the imaging lens 1 includes an aperture ST1, a fifth lens L15, a first lens L11, a second lens L12, and a second lens L12 in sequence from an object side to an image side along an optical axis OA1. Three lenses L13, a reflective element P1, a fourth lens L14 and a filter OF1. The reflective element P1 includes an incident surface S110, a reflective surface S111 and an exit surface S112, and the incident surface S110 and the exit surface S112 are perpendicular to each other. During imaging, the light from the object side is reflected by the reflecting surface S111 to change the traveling direction, and finally is imaged on an imaging surface IMA1, and the imaging surface IMA1 and the exit surface S112 are parallel to each other. In the first embodiment, the reflective element is an example but not limited to this. For example, the reflective element may be a reflective mirror and only includes a reflective surface. According to paragraphs 1 to 8 of the embodiment, the fifth lens L15 is a meniscus lens with positive refractive power, its object side surface S12 is convex, the image side surface S13 is concave, and both the object side surface S12 and the image side surface S13 are non Spherical surface; the first lens L11 is a meniscus lens, the object side S14 is concave, the object side S14 is an aspheric surface; the second lens L12 is a meniscus lens, the image side S17 is convex; the third lens L13 is Plano-convex lens, the image side surface S19 is a plane; the fourth lens L14 is a plano-concave lens with negative refractive power, and its object side S113 is a plane; The object side S115 and the image side S116 of the filter OF1 are both flat surfaces; the above-mentioned lens, the reflective element P1, the aperture ST1 and the design satisfying at least one of the conditions (1) to (20) are used to make the imaging lens 1 effective Reduce the total length of the lens, effectively improve the resolution, effectively correct aberrations, and effectively correct chromatic aberrations.

Table 1 is a table of related parameters of each lens of the imaging lens 1 in Figure 1.

The concavity z of the aspheric surface of the aspheric 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 +Eh ¹² +Fh ¹⁴ +Gh ¹⁶

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

Table 2 is the related parameter table of the aspheric surface of the aspheric lens in Table 1. Where k is the Conic Constant, and A~G are the aspheric coefficients.

Table 3 shows the relevant parameter values of the imaging lens 1 of the first embodiment and the calculated values corresponding to conditions (1) to (12), and conditions (18) to (19). From Table 3, it can be seen that the first embodiment The imaging lens 1 can meet the requirements of condition (1) to condition (12), and condition (18) to condition (19).

In addition, the optical performance of the imaging lens 1 of the first embodiment can also meet the requirements. It can be seen from FIG. 2A that the curvature of field of the imaging lens 1 of the first embodiment is between -1.2 mm and 0.04 mm. It can be seen from FIG. 2B that the distortion of the imaging lens 1 of the first embodiment is between -2% and 0%. It can be seen from FIG. 2C that the value of the modulation transfer function of the imaging lens 1 of the first embodiment is between 0.36 and 1.0. It is obvious that the field curvature and distortion of the imaging lens 1 of the first embodiment can be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 3, which is a schematic diagram of the lens configuration and optical path of the second embodiment of the imaging lens according to the present invention. The imaging lens 2 includes an aperture ST2, a first lens L21, a second lens L22, a third lens L23, a reflective element P2, a fourth lens, and a second lens L22 from an object side to an image side in order along an optical axis OA2. Lens L24 and a filter OF2. The reflective element P2 includes an incident surface S28, a reflective surface S29, and an exit surface S210, and the incident surface S28 and the exit surface S210 are perpendicular to each other. During imaging, the light from the object side is reflected by the reflecting surface S29 to change the traveling direction, and finally imaged on an imaging surface IMA2, the imaging surface IMA2 and the exit surface S210 are parallel to each other. In the second embodiment, the reflective element is an example but not limited to this. For example, the reflective element may be a reflective mirror and only includes a reflective surface. According to [Embodiment] paragraphs 1 to 8, wherein: the first lens L21 is a biconvex lens, the object side surface S22 is a convex surface, and the object side surface S22 is an aspheric surface; the second lens L22 is a meniscus lens with an image side surface S25 Convex; the third lens L23 is a plano-convex lens, and its image side S27 is a plane; the fourth lens L24 is a plano-concave lens with negative refractive power, and its object side S211 is a plane; the filter OF2 has its object side S213 and image side S214 both Is a plane; using the above-mentioned lens, reflective element P2, aperture ST2 and at least satisfying condition (1) The design of one of the conditions to condition (20) enables the imaging lens 2 to effectively reduce the total length of the lens, effectively increase the resolution, effectively correct aberrations, and effectively correct chromatic aberrations.

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

The definition of the aspheric surface concavity z of the aspheric lens in Table 4 is the same as the definition of the aspheric surface concavity z of the aspheric 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 the aspheric lens in Table 4, where k is the Conic Constant and A~G are the aspheric coefficients.

Table 6 shows the relevant parameter values of the imaging lens 2 of the second embodiment and the calculated values of corresponding conditions (1) to (9), condition (12), and conditions (18) to (19). Table 6 shows , The imaging lens 2 of the second embodiment can all meet the requirements of condition (1) to condition (9), condition (12), and condition (18) to condition (19).

In addition, the optical performance of the imaging lens 2 of the second embodiment can also meet the requirements. It can be seen from FIG. 4A that the curvature of field of the imaging lens 2 of the second embodiment is between -0.09mm and 0.04mm. It can be seen from FIG. 4B that the distortion of the imaging lens 2 of the second embodiment is between 0% and 2%. It can be seen from FIG. 4C that the value of the modulation transfer function of the imaging lens 2 of the second embodiment is between 0.23 and 1.0. It is obvious that the field curvature and distortion of the imaging lens 2 of the second embodiment can be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 5, which is a schematic diagram of the lens configuration and optical path of the third embodiment of the imaging lens according to the present invention. The imaging lens 3 includes an aperture ST3, a first lens L31, a second lens L32, a third lens L33, a reflective element P3, and a fourth lens in order from an object side to an image side along an optical axis OA3. Lens L34 and a filter OF3. The reflective element P3 includes an incident surface S38, a reflective surface S39, and an exit surface S310. The incident surface S38 and the exit surface S310 are perpendicular to each other. During imaging, the light from the object side is reflected by the reflecting surface S39 to change the traveling direction, and finally is imaged on an imaging surface IMA3, and the imaging surface IMA3 and the exit surface S310 are parallel to each other. In the third embodiment, the reflective element is taken as an example but not limited to this. For example, the reflective element may be a reflective mirror and only includes a reflective surface. According to [Embodiment] paragraphs 1 to 8, wherein: the first lens L31 is a meniscus lens, the object side surface S32 is a concave surface, and the object side surface S32 is an aspheric surface; the second lens L32 is a meniscus lens with an image The side surface S35 is convex; the third lens L33 is a meniscus lens, the image side S37 is concave, and the image side S37 is an aspheric surface; the fourth lens L34 is a meniscus lens with negative refractive power, and its object side S311 is convex , The object side surface S311 is an aspherical surface; the object side surface S313 and the image side surface S314 of the filter OF3 are both flat surfaces; the lens, the reflective element P3, the aperture ST3 and at least one of the conditions (1) to (20) are satisfied Its design enables the imaging lens 3 to effectively reduce the total length of the lens, effectively improve the resolution, effectively correct aberrations, and effectively correct chromatic aberrations.

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

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

Table 8 is the relevant parameter table of the aspheric surface of the aspheric lens in Table 7, where k is the Conic Constant and A~G are the aspheric coefficients.

Table 9 shows the relevant parameter values of the imaging lens 3 of the third embodiment and the calculated values of corresponding conditions (1) to (9), condition (12), and conditions (18) to (19), as shown in Table 9 , The imaging lens 3 of the third embodiment can all meet the requirements of condition (1) to condition (9), condition (12), and condition (18) to condition (19).

In addition, the optical performance of the imaging lens 3 of the third embodiment can also meet the requirements. It can be seen from FIG. 6A that the field curvature of the imaging lens 3 of the third embodiment is between -0.12 mm and 0.02 mm. It can be seen from FIG. 6B that the distortion of the imaging lens 3 of the third embodiment is between 0% and 2%. It can be seen from FIG. 6C that the value of the modulation transfer function of the imaging lens 3 of the third embodiment is between 0.35 and 1.0. It is obvious that the field curvature and distortion of the imaging lens 3 of the third embodiment can be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 7, which is a schematic diagram of the lens configuration and optical path of the fourth embodiment of the imaging lens according to the present invention. The imaging lens 4 extends from one object side to one along an optical axis OA4 The image side sequentially includes an aperture ST4, a first lens L41, a second lens L42, a third lens L43, a reflective element P4, a fourth lens L44, a fifth lens L45 and a filter OF4. The reflective element P4 includes an incident surface S48, a reflective surface S49, and an exit surface S410, and the incident surface S48 and the exit surface S410 are perpendicular to each other. During imaging, the light from the object side is reflected by the reflecting surface S49 to change the traveling direction, and finally is imaged on an imaging surface IMA4, and the imaging surface IMA4 and the exit surface S410 are parallel to each other. In the fourth embodiment, the reflective element is taken as an example but not limited to this. For example, the reflective element may be a reflective mirror and only includes a reflective surface. According to [Embodiment] paragraphs 1 to 8, wherein: the first lens L41 is a meniscus lens, the object side surface S42 is a concave surface, and the object side surface S42 is an aspheric surface; the second lens L42 is a meniscus lens with an image The side surface S45 is convex; the third lens L43 is a meniscus lens, the image side S47 is concave, and the image side S47 is an aspheric surface; the fourth lens L44 is a meniscus lens with negative refractive power, and its object side S411 is convex , The object side S411 is an aspheric surface; the fifth lens L45 is a biconvex lens with positive refractive power, the object side S413 is convex, the image side S414 is convex, the object side S413 and the image side S414 are aspheric surfaces; filter OF4 The object side S415 and the image side S416 are both planes; the above-mentioned lens, reflecting element P4, aperture ST4, and a design that meets at least one of the conditions (1) to (20) enable the imaging lens 4 to effectively reduce the total lens length It can effectively improve the resolution, effectively correct aberrations, and effectively correct chromatic aberrations.

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

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

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

Table 12 shows the relevant parameter values of the imaging lens 4 of the fourth embodiment and the calculated values of the corresponding conditions (1) to (9), (12), and (18) to (19). Second, it can be seen that the imaging lens 4 of the fourth embodiment can all meet the requirements of conditions (1) to (9), conditions (12), and conditions (18) to (19).

In addition, the optical performance of the imaging lens 4 of the fourth embodiment can also meet the requirements. It can be seen from FIG. 8A that the curvature of field of the imaging lens 4 of the fourth embodiment is between -0.12 mm and 0.02 mm. It can be seen from FIG. 8B that the distortion of the imaging lens 4 of the fourth embodiment is between -0.15% and 0.3%. It can be seen from FIG. 8C that the value of the modulation transfer function of the imaging lens 4 of the fourth embodiment is between 0.41 and 1.0. Obviously the field curvature and distortion of the imaging lens 4 of the fourth embodiment can be effectively repaired Positive, the lens resolution can also meet the requirements, so as to obtain better optical performance.

Please refer to FIG. 9, which is a schematic diagram of the lens configuration and optical path of the fifth embodiment of the imaging lens according to the present invention. The imaging lens 5 includes an aperture ST5, a first lens L51, a second lens L52, a third lens L53, a reflective element P5, and a fifth lens in order from an object side to an image side along an optical axis OA5. Lens L55, a fourth lens L54 and a filter OF5. The reflective element P5 includes an incident surface S58, a reflective surface S59, and an exit surface S510. The incident surface S58 and the exit surface S510 are perpendicular to each other. During imaging, the light from the object side is reflected by the reflecting surface S59 to change the traveling direction, and finally imaged on an imaging surface IMA5, and the imaging surface IMA5 and the exit surface S510 are parallel to each other. In the fifth embodiment, the reflective element is taken as an example but not limited to this. For example, the reflective element may be a reflective mirror, which only includes a reflective surface. According to [Embodiment] paragraphs 1 to 8, wherein: the first lens L51 is a meniscus lens, the object side surface S52 is a concave surface, and the object side surface S52 is an aspheric surface; the second lens L52 is a meniscus lens with an image The side surface S55 is convex; the third lens L53 is a meniscus lens, the image side S57 is concave, and the image side S57 is an aspheric surface; the fifth lens L55 is a biconvex lens with positive refractive power and is made of glass or plastic. The object side S511 is convex, the image side S512 is convex, the object side S511 and the image side S512 are aspherical surfaces; the fourth lens L54 is a meniscus lens with negative refractive power, the object side S513 is convex, and the object side S513 is Aspherical surface; the object side S515 and the image side S516 of the filter OF5 are both flat surfaces; the above lens, reflective element P5, aperture ST5 and at least the condition (1) are used The design of one of the conditions to condition (20) enables the imaging lens 5 to effectively reduce the total length of the lens, effectively improve the resolution, effectively correct aberrations, and effectively correct chromatic aberrations.

Table 13 is a table of related parameters of each lens of the imaging lens 5 in Figure 9.

The definition of the aspheric surface concavity z of the aspheric lens in Table 13 is the same as the definition of the aspheric surface concavity z of the aspheric lens in Table 1 in the first embodiment, and will not be repeated here.

Table 14 is a table of related parameters of the aspheric surface of the aspheric lens in Table 13, where k is the Conic Constant and A~G are the aspheric coefficients.

Table 15 shows the relevant parameter values of the imaging lens 5 of the fifth embodiment and the calculated values of the corresponding conditions (1) to (9), (12), and (18) to (19), as shown in Table 10 It can be seen that the imaging lens 5 of the fifth embodiment can all satisfy the requirements of the conditions (1) to (9), the conditions (12), and the conditions (18) to (19).

In addition, the optical performance of the imaging lens 5 of the fifth embodiment can also meet the requirements. It can be seen from FIG. 10A that the curvature of field of the imaging lens 5 of the fifth embodiment is between -0.10 mm and 0.025 mm. It can be seen from FIG. 10B that the distortion of the imaging lens 5 of the fifth embodiment is between 0% and 2%. It can be seen from FIG. 10C that the value of the modulation transfer function of the imaging lens 5 of the fifth embodiment is between 0.40 and 1.0. It is obvious that the field curvature and distortion of the imaging lens 5 of the fifth embodiment can be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 11, which is a schematic diagram of the lens configuration of the sixth embodiment of the imaging lens according to the present invention. The imaging lens 6 includes an aperture ST6, a first lens L61, a reflective element P6, a second lens L62, a third lens L63, and a fourth lens in order from an object side to an image side along an optical axis OA6. Lens L64 and a filter OF6. The reflective element P6 includes an incident surface S64, a reflective surface S65, and an exit surface S66. The incident surface S64 and the exit surface S66 are perpendicular to each other. During imaging, the light from the object side is reflected by the reflecting surface S65 to change the traveling direction, and finally is imaged on an imaging surface IMA6, and the imaging surface IMA6 and the exit surface S66 are parallel to each other. In the sixth embodiment, the reflective element is taken as an example but not limited to this. For example, the reflective element may be a reflective mirror and only includes a reflective surface. According to [Embodiment] paragraphs 1 to 8, wherein: the first lens L61 is a meniscus lens with a concave object side surface S62; the second lens L62 is a biconcave lens with a concave image side surface S68; and the third lens L63 is Double convex lens, the image side surface S610 is convex, the image side surface S610 is an aspheric surface; the fourth lens L64 is a meniscus lens with negative refractive power, its object side S611 is convex, and the object side S611 is an aspheric surface; the filter OF6 The object side S613 and the image side S614 are both flat surfaces; Using the above-mentioned lens, reflective element P6, aperture ST6, and a design that meets at least one of conditions (1) to (20), the imaging lens 6 can effectively reduce the total length of the lens, effectively improve the resolution, and effectively correct the image. Poor and effective correction of chromatic aberration.

Table 16 is a table of related parameters of each lens of the imaging lens 6 in Figure 11.

The aspheric surface concavity z of the aspheric lens in Table 16 is obtained by the following formula: z=ch2/{1+[1-(k+1)c ² h ² ] ^1/2 }+Ah ⁴ +Bh ⁶ +Ch ⁸ +Dh ¹⁰ +Eh ¹² +Fh ¹⁴ +Gh ¹⁶ +Hh ¹⁸ +Ih ²⁰

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

Table 17 is a table of related parameters of the aspheric surface of the aspheric lens in Table 16, where k is the Conic Constant, and A~I are the aspheric coefficients.

Table 18 shows the relevant parameter values of the imaging lens 6 of the sixth embodiment and their corresponding conditions (1) to condition (2), condition (5) to condition (6), condition (8), and condition (13) to condition For the calculated value of (19), it can be seen from Table 18 that the imaging lens 6 of the sixth embodiment can all meet the conditions (1) to (2), conditions (5) to (6), and conditions (8). (13) to the requirements of condition (19).

In addition, the optical performance of the imaging lens 6 of the sixth embodiment can also meet the requirements. begging. It can be seen from FIG. 12A that the curvature of field of the imaging lens 6 of the sixth embodiment is between -0.1mm and 0.3mm. It can be seen from FIG. 12B that the distortion of the imaging lens 6 of the sixth embodiment is between 0% and 2%. It can be seen from FIG. 12C that the value of the modulation transfer function of the imaging lens 6 of the sixth embodiment is between 0.49 and 1.0. It is obvious that the field curvature and distortion of the imaging lens 6 of the sixth embodiment can be effectively corrected, and the lens resolution 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 imaging lens according to the present invention. The imaging lens 7 includes an aperture ST7, a first lens L71, a reflective element P7, a second lens L72, a third lens L73, and a fourth lens in order from an object side to an image side along an optical axis OA7. Lens L74 and a filter OF7. The reflective element P7 includes an incident surface S74, a reflective surface S75, and an exit surface S76. The incident surface S74 and the exit surface S76 are perpendicular to each other. During imaging, the light from the object side is reflected by the reflecting surface S75 to change the traveling direction, and finally imaged on an imaging surface IMA7, the imaging surface IMA7 and the exit surface S76 are parallel to each other. In the seventh embodiment, the reflective element is taken as an example but not limited to this. For example, the reflective element may be a reflective mirror and only includes a reflective surface. According to paragraphs 1 to 8 of the [Embodiment], the first lens L71 is a meniscus lens with a concave object side surface S72; the second lens L72 is a biconcave lens with a concave image side surface S78; and the third lens L73 is Double convex lens, the image side surface S710 is convex, the image side surface S710 is an aspheric surface; the fourth lens L74 is a meniscus lens with negative refractive power, the object side S711 is convex, and the object side S711 is an aspheric surface; the filter OF7 The object side S713 and the image side S714 are both flat surfaces; Using the above-mentioned lens, reflective element P7, aperture ST7, and a design that meets at least one of conditions (1) to (20), the imaging lens 7 can effectively reduce the total length of the lens, effectively improve the resolution, and effectively correct the image. Poor and effective correction of chromatic aberration.

Table 19 is a table of related parameters of each lens of the imaging lens 7 in Figure 13.

The definition of the aspheric surface concavity z of the aspheric lens in Table 19 is the same as the definition of the aspheric surface concavity z of the aspheric lens in Table 16 in the sixth embodiment, and will not be repeated here.

Table 20 is a table of related parameters of the aspheric surface of the aspheric lens in Table 19, where k is the Conic Constant and A~I are the aspheric coefficients.

Table 21 shows the relevant parameter values of the imaging lens 7 of the seventh embodiment and their corresponding conditions (1) to condition (2), condition (5) to condition (6), condition (8), and condition (13) to The calculated value of condition (19), as shown in Table 21, the imaging lens 7 of the seventh embodiment can all satisfy the conditions (1) to (2), (5) to (6), and (8) , Conditions (13) to (19) requirements.

In addition, the optical performance of the imaging lens 7 of the seventh embodiment can also meet the requirements. It can be seen from Fig. 14A that the curvature of field of the imaging lens 7 of the seventh embodiment is between -0.05mm To 0.03mm. It can be seen from FIG. 14B that the distortion of the imaging lens 7 of the seventh embodiment is between 0% and 2%. It can be seen from FIG. 14C that the value of the modulation transfer function of the imaging lens 7 of the seventh embodiment is between 0.42 and 1.0. It is obvious that the field curvature and distortion of the imaging lens 7 of the seventh embodiment can be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 15. FIG. 15 is a schematic diagram of the lens configuration and optical path of the eighth embodiment of the imaging lens according to the present invention. The imaging lens 8 includes an aperture ST8, a first lens L81, a reflective element P8, a second lens L82, a third lens L83, and a fifth lens in order from an object side to an image side along an optical axis OA8. Lens L85, a fourth lens L84 and a filter OF8. The reflective element P8 includes an incident surface S84, a reflective surface S85, and an exit surface S86. The incident surface S84 and the exit surface S86 are perpendicular to each other. During imaging, the light from the object side is reflected by the reflecting surface S85 to change the traveling direction, and finally is imaged on an imaging surface IMA8, and the imaging surface IMA8 and the exit surface S86 are parallel to each other. In the eighth embodiment, the reflection element is taken as an example but not limited to this. For example, the reflection element may be a reflection mirror and only includes a reflection surface. According to [Embodiment] paragraphs 1 to 8, wherein: the first lens L81 is a meniscus lens with a concave object side surface S82; the second lens L82 is a biconcave lens with a concave image side surface S88; and the third lens L83 is The image side surface S810 of the biconvex lens is convex, and the image side surface S810 is an aspheric surface; the fifth lens L85 is a biconvex lens with positive refractive power and is made of glass or plastic material. Its object side S811 is convex, and the image side S812 is convex. The object side S811 and the image side S812 are aspherical surfaces; the fourth lens L84 is a meniscus lens with positive refractive power, and its object side S813 It is a convex surface, and the object side surface S813 is an aspheric surface; the object side surface S815 and the image side surface S816 of the filter OF8 are both flat surfaces; the above lens, reflective element P8, aperture ST8 and at least conditions (1) to (20) are used. A conditional design enables the imaging lens 8 to effectively reduce the total length of the lens, effectively improve the resolution, effectively correct aberrations, and effectively correct chromatic aberrations.

Table 22 is a table of related parameters of each lens of the imaging lens 8 in Figure 15.

The definition of the aspheric surface concavity z of the aspheric lens in Table 22 is the same as the definition of the aspheric surface concavity z of the aspheric lens in Table 16 of the sixth embodiment, and will not be repeated here.

Table 23 is the relevant parameter table of the aspheric surface of the aspheric lens in Table 22, where k is the Conic Constant and A~I are the aspheric coefficients.

Table 24 shows the relevant parameter values of the imaging lens 8 of the eighth embodiment and their corresponding conditions (1) to condition (2), condition (5) to condition (6), condition (8), and condition (13) to The calculated value of condition (20), as shown in Table 24, the imaging lens 8 of the eighth embodiment can all satisfy the conditions (1) to (2), (5) to (6), and (8) , Conditions (13) to (20) requirements.

In addition, the optical performance of the imaging lens 8 of the eighth embodiment can also meet the requirements. It can be seen from FIG. 16A that the curvature of field of the imaging lens 8 of the eighth embodiment is between -0.4 mm and 0.15 mm. It can be seen from FIG. 16B that the distortion of the imaging lens 8 of the eighth embodiment is between 0% and 2.75%. It can be seen from FIG. 16C that the value of the modulation transfer function of the imaging lens 8 of the eighth embodiment is between 0.33 and 1.0. It is obvious that the field curvature and distortion of the imaging 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 and optical path of the ninth embodiment of the imaging lens according to the present invention. The imaging lens 9 includes an aperture ST9, a first lens L91, a reflective element P9, a second lens L92, a third lens L93, and a sixth lens in order from an object side to an image side along an optical axis OA9. Lens L96, a fifth lens L95, a fourth lens L94 and a filter OF9. The reflective element P9 includes an incident surface S94, a reflective surface S95, and an exit surface S96. The incident surface S94 and the exit surface S96 are perpendicular to each other. During imaging, the light from the object side is reflected by the reflecting surface S95 to change the traveling direction, and finally imaged on an imaging surface IMA9, the imaging surface IMA9 and the exit surface S96 are parallel to each other. In the ninth embodiment, the reflective element is an example but not limited to this. For example, the reflective element may be a reflective mirror and only includes a reflective surface. According to [Implementation Mode] paragraphs 1 to 8, in which: The first lens L91 is a meniscus lens whose object side surface S92 is concave; the second lens L92 is a biconcave lens whose image side surface S98 is concave; the third lens L93 is a biconvex lens whose image side surface S910 is convex and the image side surface S910 It is an aspheric surface; the sixth lens L96 is a meniscus lens with negative refractive power and is made of glass or plastic material. The object side S911 is concave, the image side S912 is convex, the object side S911 and the image side S912 are aspherical surfaces ; The fifth lens L95 is a meniscus lens with positive refractive power, made of glass or plastic material, the object side S913 is concave, the image side S914 is convex, the object side S913 and the image side S914 are aspherical surfaces; the fourth lens L94 is a meniscus lens with positive refractive power, its object side S915 is convex, and object side S915 is an aspheric surface; the object side S917 and image side S918 of the filter OF9 are both flat surfaces; using the above lens, reflective element P9, and aperture ST9 and the design satisfying at least one of the conditions (1) to (20) enable the imaging lens 9 to effectively reduce the total length of the lens, effectively increase the resolution, effectively correct aberrations, and effectively correct chromatic aberrations.

Table 25 is a table of related parameters of each lens of the imaging lens 9 in Figure 17.

The definition of the aspheric surface concavity z of the aspheric lens in Table 25 is the same as the definition of the aspheric surface concavity z of the aspheric lens in Table 16 of the sixth embodiment, and will not be repeated here.

Table 26 is the relevant parameter table of the aspheric surface of the aspheric lens in Table 25, where k is the Conic Constant and A~I are the aspheric coefficients.

Table 27 shows the relevant parameter values of the imaging lens 9 of the ninth embodiment and their corresponding conditions (1) to condition (2), condition (5) to condition (6), condition (8), and condition (13) to The calculated value of condition (20), as shown in Table 27, the imaging lens 9 of the ninth embodiment can all satisfy the conditions (1) to (2), (5) to (6), and (8) , Conditions (13) to (20) requirements.

In addition, the optical performance of the imaging lens 9 of the ninth embodiment can also meet the requirements. It can be seen from FIG. 18A that the curvature of field of the imaging lens 9 of the ninth embodiment is between -0.06 mm and 0.09 mm. It can be seen from Figure 18B that the distortion of the imaging lens 9 of the ninth embodiment Between 0% and 4%. It can be seen from FIG. 18C that the value of the modulation transfer function of the imaging lens 9 of the ninth embodiment is between 0.33 and 1.0. It is obvious that the field curvature and distortion of the imaging lens 9 of the ninth embodiment can be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

The first, second, third, fourth, fifth, sixth, seventh, eighth, ninth embodiments of the imaging lens of the present invention, wherein the fifth lens L15 of the imaging lens 1 of the first embodiment can be in the second and third embodiments A fifth lens is provided between the object side of the imaging lenses 2, 3 and the first lenses L21, L31; the fifth lens L45 of the imaging lens 4 of the fourth embodiment can be the imaging lens 2 of the second and third embodiments. A fifth lens is provided between the fourth lens L24 and L34 of 3 and the image side; the fifth lens L55 of the imaging lens 5 of the fifth embodiment can be the reflective element of the imaging lenses 2 and 3 of the second and third embodiments. A fifth lens is provided between P2, P3 and the fourth lens L24, L34; the fifth lens L85, L95 of the imaging lens 8 and 9 of the eighth and ninth embodiments can be the imaging lens 6 of the sixth and seventh embodiments. 7. A fifth lens is provided between the third lens L63, L73 and the fourth lens L64, L74 of the seventh embodiment; the sixth lens L96 of the imaging lens 9 of the ninth embodiment may be the fourth lens of the imaging lens 8 of the eighth embodiment A sixth lens is provided between the three lens L83 and the fifth lens L85. In other words, the optical architectures of the imaging lenses 2 and 3 of the second and third embodiments can be arranged between the object side and the first lens, between the fourth lens and the image side, or between the reflective element and the fourth lens, including providing a fifth lens. A lens with positive refractive power; according to the sixth and seventh embodiments of the imaging lens 6, 7 optical architecture between the third lens and the fourth lens further includes a fifth lens, which has positive refractive power; can be implemented according to the eighth Example The optical structure of the imaging lens 8 further includes a sixth lens arranged between the third lens and the fifth lens, which has negative refractive power. It is worth noting that the reflective element can be arranged between the first lens and the fourth lens, and the imaging lenses 1, 2, 3, 4, and 5 can be optically constructed on the third lens and the fourth lens according to the first to fifth embodiments. The lens further includes a reflective element; the optical architecture of the imaging lenses 6, 7, 8, 9 according to the sixth to ninth embodiments may further include a reflective element between the first lens and the second lens. By arranging a reflective element between the first lens and the fourth lens, the optical system can obtain a longer back focal length, achieve high-magnification optical zoom, and maintain the size, thickness, and volume of the lens module. Do not increase too much, so that the lens module can be high-power optical zoom with the effect of miniaturization.

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

6: Imaging lens

ST6: Aperture

L61: The first lens

P6: reflective element

L62: second lens

L63: third lens

L64: Fourth lens

OF6: filter

IMA6: imaging surface

OA6: Optical axis

S61: Aperture surface

S62: Object side of the first lens

S63: The side of the first lens image

S64: incident surface

S65: reflective surface

S66: Exit surface

S67: Second lens object side

S68: Second lens image side

S69: Third lens object side

S610: Third lens image side

S611: Object side of the fourth lens

S612: Fourth lens image side

S613: Side of the filter object

S614: Filter image side

Claims (10)

An imaging lens includes: a first lens with positive refractive power, the first lens including a concave surface facing an object side and a convex surface facing an image side; a second lens with negative refractive power, the second lens including a concave surface facing the The object side; a third lens has positive refractive power; a fourth lens has refractive power, the fourth lens includes a concave surface facing the image side; and a reflective element, the reflective element includes a reflective surface; wherein the first lens, the The second lens, the third lens, and the fourth lens are arranged in order from the object side to the image side along an optical axis; wherein the reflective element is disposed between the first lens and the fourth lens; the imaging The lens satisfies the following conditions: TTL/f>1.2; among them, TTL is the total length of an optical system of the imaging lens, and f is an effective focal length of the imaging lens. According to the imaging lens described in claim 1, wherein the second lens further includes another concave surface facing the image side. According to the imaging lens of claim 2, wherein the third lens includes a convex surface facing the object side and another convex surface facing the image side; the fourth lens further includes a convex surface facing the object side. The imaging lens described in item 3 of the scope of patent application further includes a fifth lens disposed between the third lens and the fourth lens, the fourth lens having positive refractive power, and the fifth lens having positive refractive power, The fifth lens includes a convex surface facing the image side. The imaging lens described in item 4 of the scope of patent application further includes a sixth lens arranged between the third lens and the fifth lens, the sixth lens has a negative refractive power, and the sixth lens includes a concave surface facing The object side and a convex surface face the image side. The imaging lens described in any one of claims 4 to 5 of the scope of the patent application, wherein the imaging lens meets the following conditions: -2mm<8×M1T-(OD ₂ +OD ₃ +OD ₄ +OD ₅ ) <1mm; where M1T is a distance from an image side of the first lens to the reflecting surface on the optical axis, OD ₂ is an optical effective diameter of an object side of the second lens close to the object side, OD ₃ is an optical effective diameter of an object side of the third lens close to the object side, OD ₄ is an optical effective diameter of an object side of the fourth lens close to the object side, and OD ₅ is the fifth lens close to the object side One of the lens is one of the effective diameter of the object side. An imaging lens comprising: a first lens having positive refractive power, the first lens including a convex surface facing an image side; a second lens having a negative refractive power, the second lens including a concave surface facing an object side; a third lens Has positive refractive power; a fourth lens has refractive power, the fourth lens includes a concave surface facing the image side; and a reflective element, the reflective element includes a reflective surface; wherein the first lens, the second lens, the third lens The lens and the fourth lens are arranged in order from the object side to the image side along an optical axis; The reflecting element is arranged between the first lens and the fourth lens; the imaging lens satisfies the following conditions: 2mm<L<6mm; where L is the object side of the lens closest to the object side to the reflecting surface A pitch on the optical axis. Such as the imaging lens described in any one of claims 1 to 5 or 7 of the scope of patent application, wherein the imaging lens meets at least one of the following conditions: 5mm<ALOD<14mm; 0<TTL/ALOD< 2; Among them, ALOD is the sum of the optical effective diameters of the object side of each lens of the imaging lens, and TTL is the total length of an optical system of the imaging lens. The imaging lens described in any one of claims 1 to 5 or 7 of the scope of the patent application, wherein the imaging lens meets at least one of the following conditions: 1<(TTL+f)/f _obj1 <5 ；1<f _obj1 /L1T<⁴; 0.2mm ² <L1T×L1SD<2.2mm ² ; -4mm ² <L1T×R ₁₁ <0mm ² ; Among them, TTL is the total length of the optical system of one of the imaging lenses, f is An effective focal length of the imaging lens, f _obj1 is an effective focal length of the lens closest to the object side, L1T is a thickness of the first lens along the optical axis, and L1SD is one of the image sides of the first lens Optical effective radius, R ₁₁ is a curvature radius of an object side surface of the first lens. The imaging lens described in item 9 of the scope of patent application, wherein the imaging lens meets at least one of the following conditions: 0.5<M1T/L1T<4;1<TTL/L<5;0<L/f<2.5;-1<f _obj3 /f _obj4 <2; where, M1T is a distance from an image side surface of the first lens to the reflecting surface on the optical axis, L1T is a thickness of the first lens along the optical axis, TTL is the total length of an optical system of the imaging lens, L is the distance from the object side of the lens closest to the object side to the reflecting surface on the optical axis, f is an effective focal length of the imaging lens, f _obj3 Is an effective focal length of the third lens close to the object side, and f _obj4 is an effective focal length of the fourth lens close to the object side.

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