TWI756044B - Lens assembly - Google Patents

Abstract

A lens assembly includes a first lens group, a second lens group, a third lens group, a fourth lens group, a fifth lens group, a sixth lens group, and a first reflective element. The first lens group is with negative refractive power. The second lens group is with positive refractive power. The third lens group is with negative refractive power. The fourth lens group is with positive refractive power. The fifth lens group is with refractive power. The sixth lens group is with refractive power. The first reflective element includes a first reflective surface. The first lens group, the second lens group, the third lens group, the fourth lens group, the fifth lens group, and the sixth lens group are arranged in order from a first side to a second side along an axis. The first reflective element disposed between the first lens group and the sixth lens group.

Description

Imaging Lens(53)

The present invention relates to an imaging lens.

The total length of an optical zoom lens is significantly longer than that of a fixed focal length lens, and as the magnification increases, the total length of the lens increases, so today's smart phones that require thin and light cannot be equipped with optical zoom lenses of traditional architecture. Therefore, another imaging lens with a new architecture is required to meet the requirements of miniaturization, high resolution and optical zoom function at the same time, in order to meet the demand for optical zoom function of smart phones.

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

The imaging lens of the present invention includes a first lens group, a second lens group, a third lens group, a fourth lens group, a fifth lens group, a sixth lens group and a first reflecting element. The first lens group has negative refractive power. The second lens group has positive refractive power. The third lens group has negative refractive power. The fourth lens group has positive refractive power. The fifth lens group has refractive power. The sixth lens group has refractive power. The first reflection element includes a first reflection surface. The first lens group, the second lens group, the third lens group, the fourth lens group, the fifth lens group and the sixth lens group are along an axis Arranged sequentially from a first side to a second side. The light from the first side sequentially passes through the first lens group, the second lens group, the third lens group, the fourth lens group, the fifth lens group and the sixth lens group to the second side. The first reflection element is arranged between the first lens group and the sixth lens group.

The first reflecting element may further include a first incident surface facing the first side along the axis and a first exit surface facing the second side along the axis.

The first lens group includes a 1-1 lens, the 1-1 lens is a biconcave lens with negative refractive power, and includes a concave surface facing the first side along the axis and another concave surface facing the second side along the axis. The second lens group Including a 2-2 lens, the 2-2 lens is a biconvex lens with positive refractive power, and includes a convex surface along the axis toward the first side and another convex surface along the axis toward the second side, the third lens group includes a 3-1 The lens, the 3-1 lens is a meniscus lens with negative refractive power, and includes a concave surface facing the first side along the axis and a convex surface facing the second side along the axis, the fourth lens group includes a 4-1 lens, 4- 1 The lens is a meniscus lens with positive refractive power, and includes a concave surface facing the first side along the axis and a convex surface facing the second side along the axis, the fifth lens group has negative refractive power and includes a 5-1 lens, 5- 1 lens is a meniscus lens with negative refractive power, and includes a convex surface facing the first side along the axis and a concave surface facing the second side along the axis, the sixth lens group has positive refractive power and includes a 6-1 lens, 6- 1. The lens has positive refractive power and includes a convex surface facing the first side along the axis.

The first lens group may further include a 1-2 lens disposed between the 1-1 lens and the second lens group, the 1-2 lens is a meniscus lens with positive refractive power, and includes a convex surface facing the first lens along the axis The side and a concave surface are facing the second side along the axis, the second lens group may further include a 2-1 lens disposed between the first lens group and the 2-2 lens, and the 2-1 lens is a meniscus lens with negative refractive power , and includes a convex surface facing the first side along the axis and a concave surface facing the second side along the axis, the fifth lens group may further include a 5-2 lens disposed between the 5-1 lens and the sixth lens group, 5 -2 lens is curved The moon-shaped lens has negative refractive power, and includes a convex surface facing the first side along the axis and a concave surface facing the second side along the axis. The sixth lens group may further include a 6-2 lens disposed on the 6-1 lens and the second lens. Between the sides, the 6-2 lens has negative refractive power and includes a concave surface along the axis toward the second side, and the 6-1 lens is cemented with the 6-2 lens.

The second lens group includes a variable aperture.

The sixth lens group can move along the vertical axis to achieve optical anti-shake.

The second lens group and the third lens group can move along the axis, so that the imaging lens can change a magnification.

The fifth lens group can be moved along the axis to make the imaging lens perform automatic focusing.

It can further include a second reflection element disposed between the first side and the first lens group, and the second reflection element includes a second reflection surface.

The imaging lens meets at least one of the following conditions: -12mm<AB<16mm; 0.2<A/B<10; 0.5<C/A<3; 10mm<A+L1D<26mm; 12mm<L1D+StopD<16mm; 0.8 <f/L1D<4.2; 2<TTL/A<11; 0.1mm<D<0.6mm; 11mm<C<12mm; where A is the distance between the lenses in the first lens group and the lens closest to the second side along the axis A distance on the axis from the second side surface to the iris, B is the distance on the axis from the first side of the lens closest to the first side along the axis in the iris to the fourth lens group, C In the fifth lens group, the distance from one of the first side surfaces of the lens closest to the first side along the axis to an imaging surface on the axis, L1D is the distance between the first lens group and the lens closest to the first side along the axis. Optical effective diameter of one of the lenses, StopD is one of the diameters of the variable aperture, f is the effective focal length of one of the imaging lenses Distance, TTL is the distance from the first side of the lens closest to the first side along the axis to the imaging surface on the axis in the first lens group, D is the offset of the sixth lens group moving along the vertical axis direction shift.

In order to make the above objects, features, and advantages of the present invention more clearly understood, preferred embodiments are hereinafter described in detail with the accompanying drawings.

1: Imaging lens

LG11: The first lens group

LG12: Second lens group

LG13: The third lens group

LG14: Fourth lens group

P11: First reflective element

LG15: Fifth lens group

LG16: Sixth lens group

L11:1-1 lens

L12: 1-2 lens

L13: 2-1 lens

L14: 2-2 lens

ST11: Variable aperture

L15:3-1 lens

L16:4-1 lens

L17:5-1 lens

L18: 5-2 lens

L19:6-1 lens

L110: 6-2 lens

OF1: filter

IMA1: Imaging plane

OA1: axis

S11: 1-1 lens first side

S12: 1-1 lens second side

S13: 1-2 lens first side

S14: 1-2 lens second side

S15: 2-1 lens first side

S16: 2-1 lens second side

S17: 2-2 lens first side

S18: 2-2 lens second side

S19: Iris face

S110: The first side of the 3-1 lens

S111: The second side of the 3-1 lens

S112: The first side of the 4-1 lens

S113: The second side of the 4-1 lens

S114: The first incident surface

S115: The first reflecting surface

S116: The first exit surface

S117: The first side of the 5-1 lens

S118: 5-1 lens second side

S119: 5-2 lens first side

S120: 5-2 lens second side

S121: The first side of the 6-1 lens

S122: The second side of the 6-1 lens

S122: The first side of the 6-2 lens

S123: The second side of the 6-2 lens

S124: The first side of the filter

S125: The second side of the filter

IP11: The first turning point

FIG. 1 is a schematic diagram of the lens configuration and optical path at a magnification of 3 times according to the first embodiment of the imaging lens of the present invention.

FIG. 2A is a field curvature diagram of the first embodiment of the imaging lens according to the present invention at a magnification of 3 times.

FIG. 2B is a distortion diagram of the first embodiment of the imaging lens according to the present invention at a magnification of 3 times.

FIG. 2C is a Modulation Transfer Function diagram of the first embodiment of the imaging lens according to the present invention at a magnification of 3 times.

FIG. 3 is a schematic diagram of the lens configuration and optical path at a magnification of 5.5 times according to the first embodiment of the imaging lens of the present invention.

FIG. 4A is a field curvature diagram of the first embodiment of the imaging lens according to the present invention at a magnification of 5.5 times.

FIG. 4B is a distortion diagram of the first embodiment of the imaging lens according to the present invention at a magnification of 5.5 times.

Fig. 4C shows the first embodiment of the imaging lens according to the present invention at a magnification of 5.5 times Modulation transfer function graph.

FIG. 5 is a schematic diagram of the lens configuration and optical path of the first embodiment of the imaging lens according to the present invention in a magnification of 5.5 times and a large aperture mode.

FIG. 6A is a field curvature diagram of the first embodiment of the imaging lens according to the present invention at a magnification of 5.5 times and a large aperture mode

FIG. 6B is a distortion diagram of the first embodiment of the imaging lens according to the present invention at a magnification of 5.5 times and a large aperture mode.

FIG. 6C is a diagram of the modulation conversion function of the first embodiment of the imaging lens according to the present invention at a magnification of 5.5 times and a large aperture mode.

FIG. 7 is a schematic diagram of the lens configuration and optical path at a magnification of 10 times according to the first embodiment of the imaging lens of the present invention.

FIG. 8A is a field curvature diagram of the first embodiment of the imaging lens according to the present invention at a magnification of 10 times.

FIG. 8B is a distortion diagram of the first embodiment of the imaging lens according to the present invention at a magnification of 10 times.

FIG. 8C is a modulation transfer function diagram of the first embodiment of the imaging lens according to the present invention at a magnification of 10 times.

The invention provides an imaging lens, comprising: a first lens group, the first lens group has negative refractive power; a second lens group, the second lens group has positive refractive power; a third lens group, the third lens group has negative refractive power; a fourth lens group, the fourth lens group has positive refractive power; a fifth lens group, the fifth lens group has refractive power; a sixth lens group, The sixth lens group has refractive power; and a first reflection element, the first reflection element includes a first reflection surface; wherein the first lens group, the second lens group, the third lens group, the fourth lens group, the fifth lens group The lens group and the sixth lens group are sequentially arranged along an axis from a first side to a second side; wherein the light from the first side passes through the first lens group, the second lens group, and the third lens group in sequence , the fourth lens group, the fifth lens group and the sixth lens group to the second side; wherein the first reflection element is arranged between the first lens group and the sixth lens group.

Please refer to Fig. 1, Fig. 3, Fig. 5 and Fig. 7. Fig. 1 is a schematic diagram of the lens configuration and optical path at a magnification of 3 times according to the first embodiment of the imaging lens of the present invention, and Fig. 3 is based on The first embodiment of the imaging lens of the present invention is a schematic diagram of the lens configuration and optical path at a magnification of 5.5 times. FIG. 5 is a lens configuration and a large aperture mode of the first embodiment of the imaging lens according to the present invention at a magnification of 5.5 times and a large aperture. Schematic diagram of the optical path, FIG. 7 is a schematic diagram of the lens configuration and optical path at a magnification of 10 times according to the first embodiment of the imaging lens of the present invention. The imaging lens 1 includes a first lens group LG11, a second lens group LG12, a third lens group LG13, a fourth lens group LG14, a first reflecting element P11, a fifth lens group LG15, and a sixth lens Group LG16 and a filter OF1. The first lens group LG11 has negative refractive power, the second lens group LG12 has positive refractive power, the third lens group LG13 has negative refractive power, the fourth lens group LG14 has positive refractive power, the fifth lens group LG15 has negative refractive power, and the sixth lens group LG16 Having positive refractive power, the first reflection element P11 includes a first incident surface S114 , a first reflection surface S115 and a first emergent surface S116 .

The first lens group LG11, the second lens group LG12, the third lens group LG13, the fourth lens group LG14, the first reflective element P11, the fifth lens group LG15 and the sixth lens group LG16 are formed along an axis OA1 from a first lens group LG16. side to a second side are arranged in sequence, wherein the light path starts from the first side The path from the first turning point IP11 to an imaging plane IMA1 is called the axis OA1. After the axis OA1 passes through the reflective element, its path will turn once. The axis OA1 can also be designed to turn multiple times, not limited to only turning once. It should also belong to the scope of the present invention, and the reflective element can be a mirror or a mirror.

The second lens group LG12 and the third lens group LG13 can move toward or away from the first side along the axis OA1 to change the magnification of the imaging lens.

The fifth lens group LG15 can be moved to the second side toward or away from the second side along the axis OA1 to perform auto focus (Auto Focus).

The sixth lens group LG16 can move toward or away from the first side along the direction of the vertical axis OA1 to perform optical image stabilization (OIS, Optical Image Stabilization).

When imaging, the light from the first side first enters the first lens group LG11, then passes through the second lens group LG12, the third lens group LG13 and the fourth lens group LG14 in sequence, and then changes the traveling direction after being reflected by the first reflecting element P11 , and then pass through the fifth lens group LG15 and the sixth lens group LG16 in sequence, and finally form an image on the imaging plane IMA1.

The first embodiment of the imaging lens of the present invention will now be described in detail, please refer to FIG. 1 , FIG. 3 , FIG. 5 and FIG. 7 at the same time. The imaging lens 1 includes a first lens group LG11, a second lens group LG12, a third lens group LG13, a fourth lens group LG14, a first reflecting element P11, a fifth lens group LG15, and a sixth lens Group LG16, a filter OF1.

The first lens group LG11 has negative refractive power, and includes a 1-1 lens L11 and a 1-2 lens L12 in sequence from the first side to the second side along the axis OA1, and the 1-1 lens L11 is a biconcave lens with negative refractive power, And includes a concave surface S11 facing the first side along the axis OA1 and another concave surface S12 facing the second side along the axis OA1, the concave surface S11 and the concave surface S12 are both aspherical surfaces, 1-2 The lens L12 is a meniscus lens with positive refractive power, and includes a convex surface S13 facing the first side along the axis OA1 and a concave surface S14 facing the second side along the axis OA1. Both the convex surface S13 and the concave surface S14 are aspherical surfaces.

The second lens group LG12 has positive refractive power, and includes a 2-1 lens L13, a 2-2 lens L14 and a variable aperture ST11 in sequence from the first side to the second side along the axis OA1. The 2-1 lens L13 is The meniscus lens has negative refractive power, and includes a convex surface S15 facing the first side along the axis OA1 and a concave surface S16 facing the second side along the axis OA1, both the convex surface S15 and the concave surface S16 are aspherical surfaces, 2-2 lens L14 It is a biconvex lens with positive refractive power, and includes a convex surface S17 facing the first side along the axis OA1 and another convex surface S18 facing the second side along the axis OA1, both the convex surface S17 and the convex surface S18 are aspherical surfaces, and the variable aperture ST11 can be A driving element (not shown) provided inside drives the mechanism to change the aperture of the variable aperture ST11, so as to achieve multi-stage changes of the aperture.

The third lens group LG13 has negative refractive power, which includes a 3-1 lens, the 3-1 lens L15 is a meniscus lens with negative refractive power, and includes a concave surface S110 facing the first side along the axis OA1 and a convex surface S111 along the axis OA1. The axis OA1 faces the second side, and both the concave surface S110 and the convex surface S111 are aspherical surfaces.

The fourth lens group LG14 has positive refractive power, which includes a 4-1 lens, and the 4-1 lens L16 is a meniscus lens with positive refractive power, and includes a concave surface S112 facing the first side along the axis OA1 and a convex surface S113 along the axis OA1. The axis OA1 faces the second side, and both the concave surface S112 and the convex surface S113 are aspherical surfaces.

The first reflective element P11 is a structure including a first incident surface S114, a first reflective surface S115 and a first exit surface S116, and the first incident surface S114 faces along the axis OA1. On the first side, the first reflecting surface S115 faces the second side along the axis OA1, the first exit surface S116 faces the second side along the axis OA1, the first incident surface S114 and the first exit surface 116 are perpendicular to each other, the first reflecting element P11 can also be a reflecting mirror, and when it is a reflecting mirror, it can only include a reflecting surface.

The fifth lens group LG15 has negative refractive power, and includes a 5-1 lens L17 and a 5-2 lens L18 in sequence from the first side to the second side along the axis OA1. The 5-1 lens L17 is a meniscus lens with negative refractive power. The refractive power includes a convex surface S117 facing the first side along the axis OA1 and a concave surface S118 facing the second side along the axis OA1. Both the convex surface S117 and the concave surface S118 are aspherical surfaces, and the 5-2 lens L18 is a meniscus lens with Negative refractive power, and includes a convex surface S119 facing the first side along the axis OA1 and a concave surface S120 facing the second side along the axis OA1, both the convex surface S119 and the concave surface S120 are aspherical surfaces.

The sixth lens group LG16 has positive refractive power, and includes a 6-1 lens L19 and a 6-2 lens L110 in sequence from the first side to the second side along the axis OA1. The 6-1 lens L19 is a meniscus lens with positive refractive power. refractive power, and includes a convex surface S121 facing the first side along the axis OA1 and a concave surface S122 facing the second side along the axis OA1, the convex surface S121 is an aspheric surface, the concave surface S122 is a spherical surface, and the 6-2 lens L110 is a meniscus The lens has negative refractive power and includes a convex surface S122 facing the first side along the axis OA1 and a concave surface S123 facing the second side along the axis OA1. The convex surface S122 is a spherical surface and the concave surface S123 is an aspherical surface.

The object side S124 and the image side S125 of the filter OF1 are both flat surfaces.

In the above description, "towards the first side along the axis", "towards the second side along the axis" means: when the lens is located in front of the reflective element, "towards the first side along the axis" means along the axis Facing the first side; "towards the second side along the axis" means facing the opposite direction from the first side in the axial direction. When the lens is located behind the reflective element, "along the axis towards the "One side" means facing in the axial direction opposite to the second side, "along the axis toward the second side" means facing the second side in the axial direction. The same applies below. The reflective element may be the above The first reflection element, or a combination of the first reflection element and other reflection elements.

When the imaging lens 1 is changed from 3x magnification (as shown in Figure 1) to 5.5x magnification (as shown in Figures 3 and 5), the first lens group LG11 is fixed, and the second lens group LG12 follows the The axis OA1 moves to the first side, the third lens group LG13 moves to the first side along the axis OA1, the fourth lens group LG14 is fixed, and the sixth lens group LG16 is fixed along the axis OA1, so that the first lens group LG11 The distance between the second lens group LG12 and the second lens group LG12 is decreased, the distance between the second lens group LG12 and the third lens group LG13 is increased, the distance between the third lens group LG13 and the fourth lens group LG14 is increased, and the fourth lens group LG14 and the first reflective element The distance between the first incident surfaces S114 of P11 is fixed. When the imaging lens 1 is changed from 5.5 times magnification (as shown in Figures 3 and 5) to 10 times magnification (as shown in Figure 7), the first lens group LG11 is fixed, and the second lens group LG12 follows the The axis OA1 moves to the first side, the third lens group LG13 moves to the second side along the axis OA1, the fourth lens group LG14 is fixed, and the sixth lens group LG16 is fixed along the axis OA1, so that the first lens group LG11 The distance between the second lens group LG12 and the second lens group LG12 is decreased, the distance between the second lens group LG12 and the third lens group LG13 is increased, the distance between the third lens group LG13 and the fourth lens group LG14 is decreased, and the fourth lens group LG14 and the first reflecting element The distance between the first incident surfaces S114 of P11 is fixed. The change of the above-mentioned distance when the imaging lens 1 is changed from 3 times magnification to 10 times magnification can be clearly seen from Fig. 1, Fig. 3, Fig. 5, and Fig. 7.

The fifth lens group LG15 can be moved to the second side slightly closer to or slightly away from the second side along the axis OA1 to perform auto-focusing.

The sixth lens group LG16 can move toward or away from the first side along the direction of the vertical axis OA1 along the direction of the vertical axis OA1 according to the operating conditions of the user, so as to perform optical anti-shake.

The magnification of the imaging lens 1 in Fig. 3 and Fig. 5 is 5.5 times, but the imaging lens 1 in Fig. 5 is operating in the large aperture mode, so the diameter of the variable aperture of the imaging lens 1 in Fig. 5 (7.845 mm) will be significantly larger than the diameter of the iris (6.114mm) of the imaging lens 1 in Figure 3.

In addition, the imaging lens 1 satisfies at least one of the following conditions:

-12mm<A-B<16mm (1)

0.2<A/B<10 (2)

0.5<C/A<3 (3)

10mm<A+L1D<26mm (4)

12mm<L1D+StopD<16mm (5)

0.8<f/L1D<4.2 (6)

2<TTL/A<11 (7)

0.1mm<D<0.6mm (8)

11mm<C<12mm (9)

Among them, A is the distance on the axis OA1 between the second side S14 of the lens L12 closest to the second side in the first lens group LG11 and the variable aperture surface S19 on the axis OA1 in the first embodiment, and B is the first embodiment , the distance between the variable aperture surface S19 and the first side S112 of the lens L16 closest to the first side in the fourth lens group LG14 on the axis OA1, C is the first embodiment, the fifth lens group LG15 is the closest The lens L17 on the first side is a distance between the first side S117 and the imaging plane IMA1 on the axis OA1, and L1D is the first lens group LG11 in the first embodiment. An optical effective diameter of the lens L11 near the first side, StopD is a diameter of the variable aperture ST11 in the first embodiment, f is an effective focal length of the imaging lens 1 in the first embodiment, and TTL is the first embodiment In the example, the distance from the first side S11 of the lens L11 closest to the first side in the first lens group LG11 to the imaging plane IMA1 on the axis OA1, D is the first embodiment, the sixth lens group LG16 is along the vertical Axis OA1 is moved in the direction of an offset.

Using the above-mentioned lens group, the variable aperture ST11, the first reflective element P11 and the design that satisfies at least one of the conditions (1) to (9), the imaging lens 1 can effectively reduce the total length of the lens and the thickness of the lens. , Effectively improve resolution, effectively correct aberrations, and achieve optical zoom and optical anti-shake functions.

Table 1 shows the images in Fig. 1, Fig. 3, Fig. 5, and Fig. 7 when the imaging lens 1 is in 3x magnification, 5.5x magnification, 5.5x magnification, large aperture mode, and 10x magnification, respectively. Lens related parameters table.

The aspheric surface concavity z 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: vertical distance from any point on the lens surface to the optical axis; k: conic coefficient; A~G: aspheric coefficient.

Table 2 is a table of relevant parameters 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 of the corresponding conditions (1) to (9). It can be seen from Table 3 that the imaging lens 1 of the first embodiment can meet the conditions (1). ) to the requirements of condition (9).

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 when the imaging lens 1 of the first embodiment is at a magnification of 3 times, its field curvature is between -0.06mm and -0.02mm. It can be seen from FIG. 2B that when the imaging lens 1 of the first embodiment is at a magnification of 3 times, the distortion is between -3% and 0%. It can be seen from FIG. 2C that when the imaging lens 1 of the first embodiment is at a magnification of 3 times, the value of the modulation transfer function is between 0.46 and 1.0. As can be seen from FIG. 4A , when the imaging lens 1 of the first embodiment is at a magnification of 5.5 times, its field curvature is between -0.12 mm and 0.08 mm. It can be seen from FIG. 4B that when the imaging lens 1 of the first embodiment is at a magnification of 5.5 times, the distortion is between 0% and 0.8%. It can be seen from FIG. 4C that when the imaging lens 1 of the first embodiment is at a magnification of 5.5 times, the modulation transfer function value is between 0.34 and 1.0. It can be seen from FIG. 6A that when the imaging lens 1 of the first embodiment is in the 5.5x magnification and large aperture mode, the field curvature is between -0.12mm and 0.08mm. It can be seen from FIG. 6B that when the imaging lens 1 of the first embodiment is in the 5.5x magnification and large aperture mode, the distortion is between 0% and 0.8%. It can be seen from FIG. 6C that when the imaging lens 1 of the first embodiment is in the 5.5x magnification and large aperture mode, the modulation transfer function value is between 0.29 and 1.0. It can be seen from FIG. 8A that when the imaging lens 1 of the first embodiment is at a magnification of 10 times, its field curvature is between -0.2 mm and 0 mm. It can be seen from FIG. 8B that when the imaging lens 1 of the first embodiment is at a magnification of 10 times, the distortion is between 0% and 3%. It can be seen from FIG. 8C that when the imaging lens 1 of the first embodiment is at a magnification of 10 times, the modulation transfer function value is between 0.19 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 resolution of the lens can also meet the requirements, thereby obtaining better optical performance.

The imaging lens of the present invention can also add a second reflective element disposed between the first side and the first lens group. The second reflective element can be a mirror or a reflective mirror from the first side The light can pass through the second reflecting element, the first lens group, the second lens group, the third lens group, the fourth lens group, the first reflecting element, the fifth lens group and the sixth lens group in sequence to the imaging surface, and also should belong to the scope of the present invention.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone who is familiar with the art can 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 determined by the scope of the appended patent application.

1: Imaging lens

LG11: The first lens group

LG12: Second lens group

LG13: The third lens group

LG14: Fourth lens group

P11: First reflective element

LG15: Fifth lens group

LG16: Sixth lens group

L11:1-1 lens

L12: 1-2 lens

L13: 2-1 lens

L14: 2-2 lens

ST11: Variable aperture

L15:3-1 lens

L16:4-1 lens

L17:5-1 lens

L18: 5-2 lens

L19:6-1 lens

L110: 6-2 lens

OF1: filter

IMA1: Imaging plane

OA1: axis

S11: 1-1 lens first side

S12: 1-1 lens second side

S13: 1-2 lens first side

S14: 1-2 lens second side

S15: 2-1 lens first side

S16: 2-1 lens second side

S17: 2-2 lens first side

S18: 2-2 lens second side

S19: Iris face

S110: The first side of the 3-1 lens

S111: The second side of the 3-1 lens

S112: The first side of the 4-1 lens

S113: The second side of the 4-1 lens

S114: The first incident surface

S115: The first reflecting surface

S116: The first exit surface

S117: The first side of the 5-1 lens

S118: 5-1 lens second side

S119: 5-2 lens first side

S120: 5-2 lens second side

S121: The first side of the 6-1 lens

S122: The second side of the 6-1 lens

S122: The first side of the 6-2 lens

S123: The second side of the 6-2 lens

S124: The first side of the filter

S125: The second side of the filter

IP11: The first turning point

Claims (10)

An imaging lens comprising: a first lens group with negative refractive power; a second lens group with positive refractive power; a third lens group with negative refractive power ; a fourth lens group, the fourth lens group has positive refractive power; a fifth lens group, the fifth lens group has refractive power; a sixth lens group, the sixth lens group has refractive power; and a first reflective element , the first reflecting element includes a first reflecting surface; wherein the first lens group, the second lens group, the third lens group, the fourth lens group, the fifth lens group and the sixth lens group are arranged in sequence from a first side to a second side along an axis; wherein the light from the first side passes through the first lens group, the second lens group, the third lens group, and the fourth lens group in sequence The lens group, the fifth lens group and the sixth lens group are to the second side; wherein the first reflective element is disposed between the first lens group and the sixth lens group; wherein the imaging lens satisfies the following conditions: 0.8<f/L1D<4.2; f is an effective focal length of the imaging lens, and L1D is an optical effective diameter of the lens closest to the first side along the axis in the first lens group. An imaging lens includes: a first lens group, the first lens group has negative refractive power; a second lens group, the second lens group has positive refractive power; a third lens group, the third lens group has a negative refractive power; a fourth lens group, the fourth lens group has a positive refractive power; a fifth lens group , the fifth lens group has refractive power; a sixth lens group has refractive power; and a first reflection element, the first reflection element includes a first reflection surface; wherein the first lens group, the The second lens group, the third lens group, the fourth lens group, the fifth lens group, and the sixth lens group are sequentially arranged along an axis from a first side to a second side; The light from one side passes through the first lens group, the second lens group, the third lens group, the fourth lens group, the fifth lens group and the sixth lens group in sequence to the second side; wherein The first reflecting element is disposed between the first lens group and the sixth lens group; wherein the first lens group includes a 1-1 lens, the 1-1 lens is a biconcave lens with negative refractive power and includes a concave surface along the axis toward the first side and the other concave surface toward the second side along the axis; wherein the second lens group includes a 2-2 lens, the 2-2 lens is a biconvex lens with positive refractive power, and includes A convex surface faces the first side along the axis and another convex surface faces the second side along the axis; wherein the third lens group includes a 3-1 lens, and the 3-1 lens is a meniscus lens with negative refractive power, and includes a concave surface facing the first side along the axis and a convex surface facing the second side along the axis; The fourth lens group includes a 4-1 lens, the 4-1 lens is a meniscus lens with positive refractive power, and includes a concave surface facing the first side along the axis and a convex surface facing the first side along the axis Two sides; wherein the fifth lens group has negative refractive power and includes a 5-1 lens, the 5-1 lens is a meniscus lens with negative refractive power, and includes a convex surface facing the first side along the axis and a concave surface facing the second side along the axis; wherein the sixth lens group has positive refractive power and includes a 6-1 lens, the 6-1 lens has positive refractive power and includes a convex surface facing the first side along the axis. The imaging lens according to item 2 of the scope of the application, wherein: the first lens group further comprises a 1-2 lens disposed between the 1-1 lens and the second lens group, and the 1-2 lens is curved The moon-shaped lens has positive refractive power, and includes a convex surface facing the first side along the axis and a concave surface facing the second side along the axis; the second lens group further includes a 2-1 lens disposed on the first side Between the lens group and the 2-2 lens, the 2-1 lens is a meniscus lens with negative refractive power, and includes a convex surface facing the first side along the axis and a concave surface facing the second side along the axis ; This fifth lens group further comprises a 5-2 lens arranged between the 5-1 lens and the sixth lens group, and the 5-2 lens is a meniscus lens with negative refractive power, and includes a convex surface along the The axis faces the first side and a concave surface faces the second side along the axis; the sixth lens group further includes a 6-2 lens disposed between the 6-1 lens and the second side, the 6-2 lens The lens has negative refractive power and includes a concave surface facing the second side along the axis; and the 6-1 lens is cemented with the 6-2 lens. An imaging lens, comprising: a first lens group with negative refractive power; a second lens group with positive refractive power; a third lens group with negative refractive power; a fourth lens group , the fourth lens group has positive refractive power; a fifth lens group, the fifth lens group has refractive power; a sixth lens group, the sixth lens group has refractive power; and a first reflective element, the first reflective element Including a first reflection surface; wherein the first lens group, the second lens group, the third lens group, the fourth lens group, the fifth lens group and the sixth lens group along an axis from a first lens group One side to a second side are arranged in sequence; wherein the light from the first side passes through the first lens group, the second lens group, the third lens group, the fourth lens group, and the fifth lens group in sequence The lens group and the sixth lens group are to the second side; wherein the first reflecting element is arranged between the first lens group and the sixth lens group; wherein the second lens group includes a variable aperture. An imaging lens comprising: a first lens group with negative refractive power; a second lens group with positive refractive power; a third lens group with negative refractive power a fourth lens group having positive refractive power; a fifth lens group having refractive power; a sixth lens group having refractive power; and a first reflection element, the first reflection element includes a first reflection surface; wherein the first lens group, the second lens group, the third lens group, the fourth lens group, the fifth lens group and the The sixth lens group is sequentially arranged along an axis from a first side to a second side; wherein the light from the first side passes through the first lens group, the second lens group, and the third lens in sequence group, the fourth lens group, the fifth lens group and the sixth lens group to the second side; wherein the first reflective element is disposed between the first lens group and the sixth lens group; wherein the first The two lens groups include a variable aperture; wherein the imaging lens meets at least one of the following conditions: -12mm<AB<16mm; 0.2<A/B<10; 0.5<C/A<3; 10mm<A+L1D<26mm ; 12mm<L1D+StopD<16mm; 0.8<f/L1D<4.2; 2<TTL/A<11; 0.1mm<D<0.6mm; 11mm<C<12mm; wherein, A is in the first lens group, A distance from a second side of the lens closest to the second side along the axis to the iris on the axis, B is the iris to the fourth lens group, the closest along the axis A first side of the lens of the first side is on the axis A distance, C is the distance on the axis from a first side surface of the lens closest to the first side along the axis to an imaging surface in the fifth lens group, L1D is the first lens group, An optical effective diameter of the lens closest to the first side along the axis, StopD is a diameter of the variable aperture, f is an effective focal length of the imaging lens, TTL is the first lens group, along the A distance from a first side surface of the lens whose axis is closest to the first side to the imaging surface on the axis, and D is an offset of the sixth lens group moving along the direction perpendicular to the axis. The imaging lens according to any one of claim 1, item 2, item 4 or item 5 of the claimed scope, wherein the first reflecting element further comprises a first incident surface facing the first incident surface along the axis One side and a first emergent surface face the second side along the axis. The imaging lens according to any one of claims 1, 2, 4 or 5 of the scope of the patent application, wherein the second lens group and the third lens group can move along the axis to The imaging lens is changed by a magnification. The imaging lens as claimed in any one of claims 1, 2, 4 or 5 of the claimed scope, wherein the fifth lens group is movable along the axis, so that the imaging lens can automatically Focus. The imaging lens according to any one of claims 1, 2, 4 or 5 in the scope of the patent application, wherein the sixth lens group can move along the direction perpendicular to the axis to achieve optical hand protection shock. The imaging lens according to any one of claims 1, 2, 4 or 5 of the scope of the application, further comprising a second reflecting element disposed on the first side and the first lens group In between, the second reflective element includes a second reflective surface.

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