CN106443971A - The optical system used in the panoramic dual-camera module and its applied lens - Google Patents

Abstract

The embodiment of the invention discloses an optical system applied to a panoramic double-camera module, which at least comprises the following components in sequence from an object plane to an image plane along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. On the other hand, the embodiment of the invention also provides a lens. The embodiment of the invention is applied to a panoramic double-shot module of a panoramic camera or a monitoring system, and mainly comprises 7 lenses, the number of the lenses is small, the structure is simple, and the volume is small; different lenses are combined with each other, so that the optical lens has good optical properties such as ultra-wide angle, high pixel, day and night confocal property and the like.

Description

The optical system used in the panoramic dual-camera module and its applied lens

Technical field:

The invention relates to an optical system and a lens applied thereto, in particular to an optical system applied to a panoramic camera or a panoramic dual-camera module of a monitoring system and an applied lens thereof.

Background technique:

The existing optical system or lens, especially the optical system or lens used in the panoramic dual-camera module of the panoramic camera or monitoring system, has the defects of complex structure and large volume.

Invention content:

In order to overcome the problems of complex structures and large volumes in existing optical systems or lenses, an embodiment of the present invention provides an optical system applied to a panoramic dual-camera module.

The optical system used in the panoramic dual-camera module includes: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a first lens along the optical axis from the object plane to the image plane seven lenses;

The object plane side of the first lens is a convex surface, the image plane side is a concave surface, and its focal power is negative;

The object plane side of the second lens is convex, the image plane side is concave, and its focal power is negative;

The object plane side of the third lens is concave, the image plane side is convex, and its focal power is negative;

The object plane side of the fourth lens is convex, the image plane side is convex, and its refractive power is positive;

The object plane side of the fifth lens is convex, the image plane side is convex, and its refractive power is positive;

The object plane side of the sixth lens is concave, the image plane side is convex, and its focal power is negative;

The object plane side of the seventh lens is convex, the image plane side is convex, and its refractive power is positive.

On the other hand, the embodiment of the present invention also provides a lens.

A lens, in which the above-mentioned optical system applied in a panoramic dual-camera module is installed.

The embodiment of the present invention is applied to a panoramic camera or a panoramic dual-camera module of a monitoring system. It is mainly composed of 7 lenses, the number of lenses is small, the structure is simple, and the volume is small; different lenses are combined with each other to have ultra-wide angle, high Pixel, and day and night confocal and other good optical performance.

Description of drawings:

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is the structural representation of optical system or lens of the present invention;

Fig. 2 is the field curvature of optical system or lens of the present invention, distortion curve;

Fig. 3 is the chromatic aberration figure of optical system or lens of the present invention;

Fig. 4 is the MTF curve diagram of optical system or lens of the present invention under visible light;

Fig. 5 is the MTF curve diagram of optical system or lens under infrared light of the present invention;

FIG. 6 is a relative illuminance diagram of the optical system or lens of the present invention.

detailed description:

In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

As shown in FIG. 1 , the optical system applied in the panoramic dual-camera module includes: a first lens 11 , a second lens 12 , a third lens 13 , and a fourth lens 14 along the optical axis from the object plane to the image plane 19. , the fifth lens 15, the sixth lens 16, and the seventh lens 17.

The object plane side of the first lens 11 is a convex surface, the image plane side is a concave surface, and its focal power is negative;

The object plane side of the second lens 12 is a convex surface, the image plane side is a concave surface, and its focal power is negative;

The object plane side of the third lens 13 is a concave surface, the image plane side is a convex surface, and its focal power is negative;

The object plane side of the fourth lens 14 is a convex surface, the image plane side is a convex surface, and its refractive power is positive;

The object plane side of the fifth lens 15 is a convex surface, the image plane side is a convex surface, and its refractive power is positive;

The object plane side of the sixth lens 16 is a concave surface, the image plane side is a convex surface, and its focal power is negative;

The object plane side of the seventh lens 17 is convex, the image plane side is convex, and its refractive power is positive.

The embodiment of the present invention is applied to a panoramic camera or a panoramic dual-camera module of a monitoring system. It is mainly composed of 7 lenses, the number of lenses is small, the structure is simple, and the volume is small; different lenses are combined with each other to have ultra-wide angle, high Pixel, and day and night confocal and other good optical performance.

Further, the fifth lens 15 and the sixth lens 16 are glued together to form a combined lens, and the combined focal length f56 satisfies: 0.13<f/f56<0.18, where f is the focal length of the entire optical system. The structure is simple and compact, which can guarantee good optical performance.

Furthermore, the material refractive index Nd1 and material Abbe constant Vd1 of the first lens 11 satisfy: Nd1<1.78, Vd1>49; its focal length f1 meets the following requirements: -0.23<f/f1<-0.10, f is the entire optical The focal length of the system. The structure is simple and can guarantee good optical performance.

Furthermore, the focal length f2 of the second lens 12 satisfies the following requirement: -0.52<f/f2<-0.26, where f is the focal length of the entire optical system. The structure is simple and can guarantee good optical performance.

Still further, the third lens 13 is made of heavy lanthanum flint glass material, and its material refractive index Nd3 and material Abbe constant Vd3 meet: Nd2>1.91, Vd2<39; its focal length f3 meets the following requirements: -0.04<f/ f3<-0.018, f is the focal length of the entire optical system. The structure is simple and can guarantee good optical performance.

Furthermore, the fourth lens 14 is made of heavy lanthanum flint glass material, and its focal length f4 meets the following requirements: 0.12<f/f4<0.24, where f is the focal length of the entire optical system. The structure is simple and can guarantee good optical performance.

Furthermore, the sixth lens 16 is made of lanthanum flint glass material, and its refractive index Nd6 and Abbe constant Vd6 satisfy: Nd6>1.92, Vd6<20. The structure is simple and can guarantee good optical performance.

Still further, the focal length f7 of the seventh lens 17 satisfies the following requirement: 0.10<f/f7<0.25, where f is the focal length of the entire optical system. The structure is simple and can guarantee good optical performance.

Specifically, the combined focal length fI of the first lens 11 to the fourth lens 14 satisfies: 0.105<f/fI<0.187, and the combined focal length fII of the fifth lens 15 to the seventh lens 17 satisfies: 0.254<f/fII<0.329, f is the focal length of the entire optical system. The structure is simple and can guarantee good optical performance.

Further, the diaphragm 18 of the optical system is located between the fourth lens 14 and the fifth lens 15 , close to the side of the fifth lens 15 . The structure is simple, and it is used to adjust the intensity of the light beam.

More specifically, each lens of the optical system satisfies the following conditions:

(1) -0.23<f/f1<-0.10;

(2) -0.52<f/f2<-0.26;

(3) -0.04<f/f3<-0.018;

(4) 0.12<f/f4<0.24;

(5) 0.13<f/f56<0.18;

(6) 0.10<f/f7<0.25;

(7) 0.105<f/fI<0.187;

(8) 0.254<f/fⅡ<0.329;

Among them, f is the focal length of the entire optical system, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f56 is the fifth lens and the sixth lens The combined focal length of the lenses, f7 is the focal length of the seventh lens, fI is the combined focal length of the first lens to the fourth lens, and fII is the combined focal length of the fifth lens to the seventh lens. The structure is simple, and different lenses are combined with each other, which has good optical performance such as ultra-wide angle, high pixel, and day and night confocal.

Still further, the first lens 11 to the seventh lens 17 are all glass lenses, which can ensure good optical performance.

Specifically, in this embodiment, the focal length f of the optical system is 0.94 mm, the aperture index FNo. is 2.0, the total optical length TTL is 14.84 mm, and the viewing angle 2ω=210°. The basic parameters of the optical system are shown in the table below:

In the above table, from the object plane to the image plane along the optical axis, S1 and S2 correspond to the two surfaces of the first lens 11; S3 and S4 correspond to the two surfaces of the second lens 12; S5 and S6 correspond to the third lens The two surfaces of 13; S7, S8 correspond to the two surfaces of the fourth lens 14; STO, S10 correspond to the two positions where the diaphragm 18 is located; S11, S12 correspond to the two surfaces of the fifth lens 15; S12, S13 corresponds to the two surfaces of the sixth lens 16 ; S14 and S15 correspond to the two surfaces of the seventh lens 17 ; S16 and S17 correspond to the two surfaces of the filter located between the seventh lens 17 and the image plane 19 .

It can be seen from FIG. 2 to FIG. 6 that the optical system in this embodiment has excellent optical performances such as ultra-wide angle, high pixel, and day and night confocal.

A lens, in which the above-mentioned optical system applied in a panoramic dual-camera module is installed.

The foregoing is one or more implementation modes provided in conjunction with specific content, and it is not considered that the specific implementation of the present invention is limited to these descriptions. Any approach or similarity to the methods and structures of the present invention, or some technical deduction or replacement based on the concept of the present invention shall be regarded as the scope of protection of the present invention.

Claims (10)

1. the double optical systems that takes the photograph in module of panorama are applied to, are included from object plane to image planes successively along optical axis：First lens, second Lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens；Characterized in that,

The object plane side of first lens is convex surface, and image planes side is that concave surface, its focal power is negative；

The object plane side of second lens is convex surface, and image planes side is that concave surface, its focal power is negative；

The object plane side of the 3rd lens is concave surface, and image planes side is that convex surface, its focal power is negative；

The object plane side of the 4th lens is convex surface, and image planes side is convex surface, its focal power for just；

The object plane side of the 5th lens is convex surface, and image planes side is convex surface, its focal power for just；

The object plane side of the 6th lens is concave surface, and image planes side is that convex surface, its focal power is negative；

The object plane side of the 7th lens is convex surface, and image planes side is convex surface, its focal power for just.

2. according to claim 1 be applied to the double optical system that takes the photograph in module of panorama, it is characterised in that the 5th lens and 6th lens are mutually glued to form compound lens, and its combined focal length f56 meets：0.13<f/f56<0.18, f is whole optical system The focal length of system.

3. according to claim 1 the double optical system that takes the photograph in module of panorama is applied to, it is characterised in that the first lens are extremely Combined focal length f I of the 4th lens meets：0.105<f/fⅠ<0.187, combined focal length f II of the 5th lens to the 7th lens is full Foot：0.254<f/fⅡ<0.329, f is the focal length of whole optical system.

4. according to claim 1 the double optical system that takes the photograph in module of panorama is applied to, it is characterised in that the optical system Each lens meet following condition：

(1)-0.23<f/f1<-0.10；

(2)-0.52<f/f2<-0.26；

(3)-0.04<f/f3<-0.018；

(4)0.12<f/f4<0.24；

(5)0.13<f/f56<0.18；

(6)0.10<f/f7<0.25；

(7)0.105<f/fⅠ<0.187；

(8)0.254<f/fⅡ<0.329；

Wherein, f is the focal length of whole optical system, and f1 is the focal length of the first lens, and f2 is the focal length of the second lens, and f3 is the 3rd The focal length of lens, f4 is the focal length of the 4th lens, and f56 is the combined focal length of the 5th lens and the 6th lens, and f7 is the 7th lens Focal length, f I for the first lens to the 4th lens combined focal length, f II for the 5th lens to the 7th lens combined focal length.

5. according to claim 1 the double optical system that takes the photograph in module of panorama is applied to, it is characterised in that the first lens Refractive Index of Material Nd1, material Abbe constant Vd1 meet：Nd1 ＜ 1.78, Vd1 ＞ 49；Its focal length f1 meets following requirement：- 0.23<f/f1<- 0.10, f are the focal length of whole optical system.

6. according to claim 1 the double optical system that takes the photograph in module of panorama is applied to, it is characterised in that the second lens Focal length f2 meets following requirement：-0.52<f/f2<- 0.26, f are the focal length of whole optical system.

7. according to claim 1 the double optical system that takes the photograph in module of panorama is applied to, it is characterised in that the 3rd lens Refractive Index of Material Nd3, material Abbe constant Vd3 meet：Nd2 ＞ 1.91, Vd2 ＜ 39；Its focal length f3 meets following requirement：- 0.04<f/f3<- 0.018, f are the focal length of whole optical system.

8. according to claim 1 the double optical system that takes the photograph in module of panorama is applied to, it is characterised in that the 4th lens Focal length f4 meets following requirement：0.12<f/f4<0.24, f is the focal length of whole optical system.

9. according to claim 1 the double optical system that takes the photograph in module of panorama is applied to, it is characterised in that optical system Diaphragm Wei Yu the 4th lens and the 5th lens between, near the 5th lens side.

10. a kind of camera lens, it is characterised in that be provided with being applied to described in any one of claim 1-9 in camera lens panorama is double and take the photograph Optical system in module.