CN116256868A

CN116256868A - Light high-power pick-up lens with aberration eliminating function

Info

Publication number: CN116256868A
Application number: CN202111497734.1A
Authority: CN
Inventors: 刘克迅; 陈宝全
Original assignee: Binyang Technology Co ltd; Xinshi Technology Co ltd
Current assignee: Binyang Technology Co ltd; Xinshi Technology Co ltd
Priority date: 2021-12-09
Filing date: 2021-12-09
Publication date: 2023-06-13

Abstract

The invention discloses a light high-power camera lens with aberration eliminating function, wherein a first optical lens and a second optical lens are arranged at an aperture diaphragm in a lens shell for eliminating aberration of a light image; the primary mirror is smaller and is attached to a third optical lens, the primary mirror is respectively provided with a first field lens and a second field lens at the front side and the back side, and an image sensor is arranged behind the second field lens, so that high-quality imaging without aberration can be obtained, the imaging is clearer during shooting, and the assembly and the adjustment are more convenient.

Description

Light high-power pick-up lens with aberration eliminating function

Technical Field

The invention relates to a light high-power camera lens with aberration eliminating function; particularly, the light-duty camera lens device suitable for being matched with handheld electronic products such as a mobile phone or a tablet personal computer can be directly arranged on the mobile phone or the tablet personal computer and combined with a camera system on the original mobile phone or the tablet personal computer to switch lens modules with different focal lengths, and can shoot people or objects to be shot in a short distance or a long distance with different focal lengths, so that the purpose of high definition and high magnification illumination is achieved.

Background

In addition to the main stream of light, thin, short and small, the light camera lens on the hand-held electronic products such as the mobile phone or the tablet computer needs to have high magnification and definition to meet the expectations of consumers, but because the mobile phone or the tablet computer has other main functions, the photographing or the photographing is only one of the multifunctional items, the photographing function on the device is limited by the small thickness of the mobile phone or the tablet computer, the photographing function on the device is limited by the volume factor, the lens and the motor cannot be provided with a zoom lens like a professional camera, the focal length of the standard lens is 3.5mm, the focal length of the lens is limited, and the photographing of people and objects with a long distance cannot be optimally performed; in order to solve the problem, the conventional mobile phone is mostly provided with two groups of lenses, one of the two groups of lenses is a straight-arranged lens (for example, a 3.5mm lens), the other of the two groups of lenses is a transverse-arranged lens (limited by space factors, only multiple times of the 3.5mm lens) and can be respectively switched and used by a system operation, but the problem of focal length of the lenses is still limited due to the fact that the two groups of lenses are still limited by the thickness of the mobile phone, so that although the two groups of lenses can be switched to take pictures with different focal lengths, the result is still very limited, namely, the lenses can be switched, but the multiple of an object image can be reduced to be compared with the standard 3.5mm lens, and the multiple of the object image is still very limited due to the fact that the multiple of the zoom is less, so far as to the requirement of the user, the design of the switching of the lenses has no special meaning, the problem of greatly improving the focal length of the lenses is basically not caused, but the existing double-effect design is quite limited by the fact that the existing photographing is realized.

The conventional secondary mirror has been developed to solve the above problems, but the conventional secondary mirror is designed to not only block too much light and affect the amount of light, but also reduce the resolution of the optical system, and in terms of manufacture and assembly, if an aspherical optical lens is used, the cost is too high, and if a glass spherical lens is used, the cost is reduced, but the spherical aberration is large, and the design and assembly adjustment are not easy, so that the design is often difficult to break through.

Disclosure of Invention

The invention mainly aims to design a reflective tele objective lens with a large aperture, which mainly comprises the steps of firstly enabling light to pass through three to four optical lenses, then enabling the light to be incident into a main reflector, enabling the light to pass through a light-guiding surface bottom reflection area of the main reflector, then reflecting the light to a secondary reflector arranged in front of a third lens, enabling the light to enter the light-guiding surface bottom reflection area of the secondary reflector, and then reflecting the light to return to a field lens in the middle of the main reflector, finally enabling the light to reach an image sensor for imaging, thereby not only solving the problem that a spherical lens with lower cost has large chromatic aberration, but also achieving resolution of tens of thousands of pixels, wherein the pixel size is 1.5 micrometers (mum), thus reducing the difficulty of assembling and adjusting an optical system of the lens, enabling the lens to have the advantage of reducing cost, and reducing the obstruction of light to 36-40% in the size of the secondary reflector, and obtaining bright and clear image quality.

To achieve the above object, the present invention can be achieved in the following manner: the aperture diaphragm in the lens shell is sequentially provided with: the first optical lens is a concave lens, and the concave cambered surface of the first optical lens is positioned at the aperture diaphragm; the second optical lens is a convex lens; the second optical mirror and the first optical mirror in front eliminate the aberration of the light image; the primary reflecting mirror is arranged behind the second optical mirror, the diameter of the secondary reflecting mirror is smaller than that of the second optical mirror, the side face facing the second optical mirror is provided with a concave cambered surface, and a bottom reflecting area is formed on the back side of the concave cambered surface; a main reflector forming a concave arc body towards the aperture diaphragm of the lens shell, wherein a first field lens and a second field lens are respectively arranged on the front side and the back side, and a bottom reflection area is arranged at the front light facing surface of the main reflector; an image sensor is arranged behind the second field lens on the back side of the main reflector to receive high-quality imaging light rays without aberration.

Another object of the present invention is to reduce the size of the sub-mirror to forty percent or less of the original lens, so that the peripheral side can obtain more excellent light entering, and a brighter and clearer view can be obtained during image capturing.

Still another object of the present invention is to reduce the diameter of the secondary mirror to forty percent of the original lens diameter, but because the secondary mirror is combined with a third optical mirror to be attached to the secondary mirror, the third optical mirror is directly formed as a support of the secondary mirror, the assembly and the adjustment are more convenient, and the third optical mirror is light-transmitting, so that the defect of blocking light is avoided.

Drawings

FIG. 1 is a schematic view illustrating the light ray propagation when the present invention is implemented after combination.

Fig. 2 is an exploded view of the optical system of the present invention, shown in fig. 1.

Fig. 3 is an exploded view of the optical system of the present invention, fig. 2.

Fig. 4 is a cross-sectional view of an optical system of the present invention.

Fig. 5 is a schematic diagram of the display of the present invention applied to a mobile phone.

Fig. 6 is a structural explanatory diagram of another embodiment of the present invention.

Fig. 7 is a schematic view illustrating the light ray traveling of fig. 6.

Reference numerals illustrate: 1-a camera lens; 10-a first optical mirror; 11-a concave cambered surface; 20-a second optical mirror; 30-reflecting mirror; 301-a concave cambered surface; 31-an underlayer reflective region; 40-a third optic; 41-a secondary mirror; 50-a primary mirror; 51-an underlayer reflective region; 60-a first field lens; 61-a second field lens; 70-an image sensor; 80-a lens housing; 81-aperture stop; 90-mobile phone; 91-a camera lens; m1-shooting scenic spots; m2-camera scenic spot; l-ray.

Detailed Description

Referring to fig. 1, 2, 3 and 4, wherein fig. 1 and 2 are respectively an exploded view of a forward direction and a backward direction, and fig. 3 and 4 are combined to describe the structure of the lens in detail, the image capturing lens 1 of the present invention mainly includes, in order at an aperture stop 81 (i.e. an aperture stop) in a lens housing 80:

the first optical lens 10 is a concave lens, and the concave arc surface 11 of the first optical lens 10 is located at the aperture stop 81 to receive light.

A second optical lens 20, which is a convex lens; and the second optical mirror 20 and the first optical mirror 10 in front can correct the aberration of the light shadow.

A sub-mirror 30 disposed behind the second optical mirror 20, the sub-mirror 30 having a diameter of forty percent or less of the diameter of the second optical mirror 20, and having a concave arc surface 301 on a side surface facing the second optical mirror 20, and forming a bottom reflection region 31 on a back side of the concave arc surface 301; because of the smaller volume of the sub-mirror 30, when the center lines are aligned with the center lines of other optical systems, such as the first optical mirror 10 and the second optical mirror 20, a fixture should be provided for suspending the sub-mirror 30 in the lens housing 80, but the fixture can take the conventional design and is not described herein.

In order to make the minor 30 of the aforesaid smaller volume obtain the better fixed, and under the condition of not shading, the invention has a third optical mirror 40, locate the rear of this minor 30, and make this minor 30 and third optical mirror 40 laminate, make this third optical mirror 40 support the structural body of minor 30, and this third optical mirror 40 is because of being light-transmitting, so there is not the disadvantage of shading, it is better than the mere use lens clamp in the prior art.

A main reflector 50 forms a concave arc toward the aperture stop 81 of the lens housing 80, a first field lens 60 and a second field lens 61 are respectively disposed on the front side and the back side, and a bottom reflection area 51 is disposed on the front light-facing surface of the main reflector 50.

An image sensor 70 is disposed behind the second field lens 61 on the back side of the main mirror 50 to receive the high-quality imaging light L.

When the invention is used, as shown in fig. 1, when light L enters from the aperture stop 81 of the lens housing 80, passes through the first optical mirror 10 and the second optical mirror 20, aberration can be eliminated in advance, and the volume of the secondary mirror 30 is smaller, the entered light L penetrates through the third optical mirror 40 from the outer periphery of the secondary mirror 30 to the area of the outer ring area of the primary mirror 50, then is reflected forward to the bottom reflection area 31 of the secondary mirror 30 through the bottom reflection area 51 of the primary mirror 50, and then is emitted towards the first field lens 60 in front of the primary mirror 50, and the light L forms a high-quality image after the image is reduced through the first field lens 60 and the second field lens 61, and then is transmitted to the image sensor 70 for receiving, thus obtaining a high-power image capturing function with long focal length.

Referring to fig. 5, the imaging lens 1 of the present invention can be connected with the mobile phone 90 by wired or wireless signals, when the imaging lens 91 of the mobile phone 90 is aligned with the imaged scene, a general imaged scene M1 can be generated, when the imaging lens 1 of the present invention is to be used, the coaxial center position is aligned with the scene to be amplified (when the tree in fig. 5 is to be used), the imaging scene M2 imaged by the imaging lens 1 of the present invention can be switched by the existing electronic device, and the reflective tele design of the present invention has the function of eliminating aberration, so that the amplified scene is clearly presented.

Referring to fig. 6 and 7, in the embodiment of the invention, a sub-mirror 41 is attached to the side of the third optical mirror 40 near the main mirror 50, and the sub-mirror 41 is an optical lens for adjusting the image; the optical lens can be mainly used for eliminating aberration or filtering unnecessary colored wavelengths, so that the light L is reflected to the secondary reflector 30 by the primary reflector 50, respectively passes through the secondary reflector 41 and the third optical lens 40, is emitted by the secondary reflector 30 towards the first field lens 60 in front of the primary reflector 50, is reduced in image by the first field lens 60 and the second field lens 61, forms required high-quality imaging, and is then transmitted to the image sensor 70 for receiving, so that the long-focal-length high-power image capturing function is obtained.

Thus, the present invention has the following advantages:

1. the invention uses the reflective magnification design, and the first optical mirror and the second optical mirror are arranged in front of the invention to eliminate the aberration, so that the image quality is clearer.

2. The invention reduces the diameter of the secondary reflector to be less than forty percent of the original lens diameter, so that the periphery side can obtain better light entering, and the invention can obtain brighter and clear scenery, which is another advantage of the invention.

3. In view of the above, the secondary mirror of the present invention is reduced, but is bonded with a third optical mirror, so that the third optical mirror is a structure for supporting the secondary mirror, and the third optical mirror is transparent, so that the defect of shading is avoided, and the lens clamp is more excellent than the existing lens clamp, and the assembly and adjustment are more convenient.

The described structure is merely a preferred embodiment and is not intended to limit the scope of the invention; equivalent or easy variations will be apparent to those skilled in the art without departing from the spirit and scope of the present invention, such as: the lens shape or size is changed, the number of concave-convex mirrors is changed to be replaced equivalently, similar optical systems are used, or the same materials are used, but the invention is also covered by the invention.

Claims

1. A light high-power camera lens with aberration eliminating function is characterized in that an aperture diaphragm in a lens shell is sequentially provided with:

the first optical lens is a concave lens, and the concave cambered surface of the first optical lens is positioned at the aperture diaphragm;

the second optical lens is a convex lens; the second optical mirror and the first optical mirror in front eliminate the aberration of the light image;

the primary reflecting mirror is arranged behind the second optical mirror, the diameter of the secondary reflecting mirror is smaller than that of the second optical mirror, the side face facing the second optical mirror is provided with a concave cambered surface, and a bottom reflecting area is formed on the back side of the concave cambered surface;

a main reflector forming a concave arc body towards the aperture diaphragm of the lens shell, wherein a first field lens and a second field lens are respectively arranged on the front side and the back side, and a bottom reflection area is arranged at the front light facing surface of the main reflector;

and the image sensor is arranged behind the second field lens on the back side of the main reflector so as to receive high-quality imaging light.

2. The light-weight high power imaging lens with aberration eliminating function according to claim 1, wherein the diameter of the sub-reflecting mirror is forty percent or less of the diameter of the second optical mirror.

3. The light-weight high power imaging lens with aberration eliminating function as defined in claim 1, wherein said sub-mirror is fixed to the inside of the lens housing by a jig.

4. The light-weight high-power imaging lens with aberration eliminating function as defined in claim 1, wherein a third optical mirror is further disposed between the secondary mirror and the main mirror, and the secondary mirror is attached to the third optical mirror.

5. The light high power camera lens with aberration eliminating function as defined in claim 1, wherein said third optical lens is attached with a sub-lens on the side close to said main reflecting lens, said sub-lens being an optical lens for adjusting image.