CN218446140U

CN218446140U - Glass-plastic mixed miniature lens

Info

Publication number: CN218446140U
Application number: CN202221811199.2U
Authority: CN
Inventors: 郑勇强
Original assignee: Jiangxi Phoenix Optical Technology Co ltd
Current assignee: Jiangxi Phoenix Optical Technology Co ltd
Priority date: 2022-07-13
Filing date: 2022-07-13
Publication date: 2023-02-03
Anticipated expiration: 2032-07-13

Abstract

The utility model discloses a mixed miniature lens is moulded to glass, including the lens cone, the mixed miniature lens is moulded to glass still places the lens cone in including and by first lens, first space ring, second lens, second space ring, third lens and the fourth lens that thing side to picture side set gradually. The lens is assembled in the lens barrel through the first lens, the first space ring, the second lens, the second space ring, the third lens and the fourth lens, so that the clear reality of imaging is improved, the dimensional tolerance precision and the coaxiality of the inner aperture of the lens barrel are improved through the integral design, the assembled eccentric core of the lens and the assembled lens barrel is ensured, the product assembly yield is improved, the space ring is designed among the lenses, the air space and the consistency of an optical axis among the lenses are ensured, and meanwhile, the cost is lower; the light blocking holes are designed to improve the imaging quality of each lens and reduce the generation of stray light, and the annular grooves are designed to reduce the weight of the lens barrel, so that the whole material of the lens is uniform.

Description

Glass-plastic mixed miniature lens

Technical Field

The utility model belongs to the camera lens field, concretely relates to glass is moulded and is mixed miniature camera lens.

Background

With the rapid development of science and technology, the lens brings more and more convenience to the life of people, has wide application, and is suitable for industries such as aviation, commerce, media, enterprises and public institutions, families and the like. At present, most of lenses are designed to be spherical, the spherical design influences the imaging effect, and in addition, the manufacturing cost of the lenses is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve the problem of proposing in the background art, provide a glass and mould mixed miniature camera lens.

In order to achieve the above purpose, the utility model adopts the technical proposal that:

the utility model provides a mixed miniature lens is moulded to glass, including the lens cone, the mixed miniature lens is moulded to glass still places the lens cone in including and by first lens, first space ring, second lens, second space ring, third lens and the fourth lens that thing side to picture side set gradually, wherein:

the first lens is a plastic double-concave lens.

And the second lens is a glass biconvex lens.

And the first space ring is abutted and limited with the first lens and the second lens respectively.

The third lens is a plastic biconvex lens.

The fourth lens is a plastic negative crescent lens and is abutted against the inner wall of the lens cone for limiting.

And the second space ring is abutted and limited with the second lens and the third lens respectively.

Preferably, the glass-plastic hybrid miniature lens further satisfies the following conditions:

3.96mm≤f1≤4.37mm，6.98mm≤f2≤7.72mm，2.99mm≤f3≤3.31mm，-4.86mm≤f4≤-4.40mm。

wherein f1, f2, f3 and f4 sequentially represent focal lengths of the first lens, the second lens, the third lens and the fourth lens.

1.46≤nd1≤1.61，1.44≤nd2≤1.59，1.46≤nd3≤1.61，1.55≤nd4≤1.72。

where nd1, nd2, nd3, and nd4 denote refractive indices of the first lens, the second lens, the third lens, and the fourth lens in this order.

52.93≤vd1≤58.50，60.99≤vd2≤67.41，52.93≤vd3≤58.50，22.77≤vd4≤25.17。

wherein vd1, vd2, vd3, and vd4 sequentially represent dispersion values of the first lens, the second lens, the third lens, and the fourth lens.

Preferably, the outer wall of the lens barrel is provided with threads.

Preferably, the lens barrel is further provided with a light blocking hole, and the light blocking hole is located at the image side of the fourth lens.

Preferably, the image side of the lens barrel is further provided with an annular groove.

Preferably, the first lens, the third lens and the fourth lens are all aspheric lenses, and the second lens is a spherical lens.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the lens is assembled in the lens barrel through the first lens, the first space ring, the second lens, the second space ring, the third lens and the fourth lens, so that the clear reality of imaging is improved, the dimensional tolerance precision and the coaxiality of the inner aperture of the lens barrel are improved through the integral design, the assembled eccentric core of the lens and the assembled lens barrel is ensured, the product assembly yield is improved, the space ring is designed among the lenses, the air space and the consistency of an optical axis among the lenses are ensured, and meanwhile, the cost is lower;

2. the light blocking holes are designed for improving the imaging quality of each lens and reducing the generation of stray light, the weight reduction operation of the lens barrel is realized by designing the annular grooves, the uniformity of the whole material of the lens can be realized, the shrinkage degree of the lens barrel can be reduced, and the size precision of the lens barrel is further ensured.

Drawings

FIG. 1 is a cross-sectional view of a glass-plastic hybrid miniature lens according to the present invention;

fig. 2 is a cross-sectional view of the lens barrel of the present invention;

fig. 3 is a partial enlarged view a of the present invention.

Description of the reference numerals: 1. a lens barrel; 2. a first lens; 3. a first space ring; 4. a second lens; 5. a second space ring; 6. a third lens; 7. a fourth lens; 8. a thread; 9. a light blocking hole; 10. an annular groove.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

As shown in fig. 1 to 3, a glass-plastic hybrid miniature lens includes a lens barrel 1, and further includes a first lens 2, a first spacer 3, a second lens 4, a second spacer 5, a third lens 6, and a fourth lens 7, which are disposed in the lens barrel 1 and are sequentially arranged from an object side to an image side, wherein:

the first lens 2 is a plastic double concave lens.

The second lens 4 is a glass biconvex lens.

And the first space ring 3 is abutted and limited with the first lens 2 and the second lens 4 respectively.

The third lens 6 is a plastic biconvex lens.

The fourth lens 7 is a plastic negative crescent lens and is abutted against the inner wall of the lens cone 1 for limiting.

And the second space ring 5 is propped against the second lens 4 and the third lens 6 for limiting.

Specifically, this mixed miniature camera lens of glass material adopts the lens of glass material and the lens equipment of plastics material. Taking fig. 1 as an example, the lens barrel 1 is made of plastic, the first lens 2, the first space ring 3, the second lens 4, the second space ring 5, the third lens 6 and the fourth lens 7 are sequentially arranged from left to right, the first lens 2 abuts against and is limited by the left side wall inside the lens barrel 1, the fourth lens 7 abuts against and is limited by the right side wall inside the lens barrel 1, the first space ring 3 and the second space ring 5 are in annular structures, the inner wall of each space ring is designed into a rough surface, and extinction oxidation treatment is adopted, so that the problem that the inner wall of the space ring is smooth and causes poor phenomena such as stray light caused by a high refractive index can be effectively solved, the stray light incident on the rough surface structure is effectively inhibited, and the effect of improving the imaging quality of the lens is achieved. The space ring is matched with each lens to achieve coaxiality of installation of each lens and consistency of optical axes of the lenses, and the lens barrel 1 is tightly matched with each lens to achieve consistency of axial centers of the installed lenses and decentration of lenses. The lens barrel 1 is internally provided with grooves corresponding to the lenses and the space rings for matching installation, so that the reliability and stability of the installation of the lenses and the space rings are ensured. The inner wall design chamfer structure of each recess has reduced lens cone 1 forming process and has produced deckle edge, guarantees the optical axis uniformity behind lens cone 1 of each lens and each spacer group dress, has improved product equipment yield. Each groove is designed in a step shape, so that the inside of the lens cone 1 is easy to demould during machining and forming, the tolerance precision and the coaxiality of the inner aperture size of the lens cone 1 are improved, the assembled lens and the assembled lens cone 1 are eccentric, and the product assembling yield is improved. Lens cone 1 is the high-accuracy integrated into one piece structure of moulding plastics, and the coarse surface structure of inner wall design extinction adopts sand blasting to handle, can effectively solve lens cone 1 inner wall smooth and lead to higher refracting index to arouse bad phenomena such as stray light, effectively restraines the stray light of inciding to on the coarse surface structure, further plays the effect that improves the camera lens imaging quality.

In one embodiment, the glass-plastic hybrid miniature lens further satisfies the following condition:

where f1, f2, f3, and f4 denote focal lengths of the first lens 2, the second lens 4, the third lens 6, and the fourth lens 7 in this order.

where nd1, nd2, nd3, and nd4 denote refractive indices of the first lens 2, the second lens 4, the third lens 6, and the fourth lens 7 in this order.

In one embodiment, the glass-plastic hybrid miniature lens further satisfies the following conditions:

where vd1, vd2, vd3, and vd4 denote dispersion values of the first lens 2, the second lens 4, the third lens 6, and the fourth lens 7 in this order.

In one embodiment, the outer wall of the barrel 1 is provided with threads 8.

Specifically, the screw 14 is M12 × P0.5, and is located at a position near the right side of the lens barrel 1, and the screw 14 is designed to connect and fix the whole lens and the camera.

In an embodiment, the lens barrel 1 further has a light blocking hole 9, and the light blocking hole 9 is located on the image side of the fourth lens element 7.

Specifically, the light blocking hole is located on the right side of the lens barrel 1, and is used for improving the image quality of the image formed by each lens and reducing the generation of stray light.

In one embodiment, the lens barrel 1 further has an annular groove 10 formed on the image side.

Specifically, the annular groove 10 is located on the right side of the lens barrel 1, the plastic is melted through high temperature when the lens barrel 1 is molded, the fluid is injected into an inner cavity of a mold to be integrally molded, the annular groove 10 has the function of performing weight reduction operation on the lens 1 under the condition that the performance of the lens is not influenced, namely, the material is removed, the integral material of the lens is uniform, and the flow rate is uniform when the fluid plastic is injected; because the injection molding is carried out at high temperature, the cooling is carried out after the molding to return to normal temperature, the plastic for manufacturing the lens cone 1 has certain shrinkage to influence the dimensional accuracy, the shrinkage degree can be reduced by weight reduction operation, and the dimensional accuracy of the lens cone 1 is ensured.

In one embodiment, the first lens 2, the third lens 6 and the fourth lens 7 are all aspheric lenses, and the second lens 4 is a spherical lens.

In particular, the aspherical mirror enables imaging to be clearer, truer and not deformed.

The lens is assembled in the lens barrel through the first lens, the first space ring, the second lens, the second space ring, the third lens and the fourth lens, so that the clear reality of imaging is improved, the dimensional tolerance precision and the coaxiality of the inner aperture of the lens barrel are improved through the integral design, the assembled eccentric core of the lens and the assembled lens barrel is ensured, the product assembly yield is improved, the space ring is designed among the lenses, the air space and the consistency of an optical axis among the lenses are ensured, and meanwhile, the cost is lower; through the design of the light blocking holes, the imaging quality of each lens is improved, the generation of stray light is reduced, the weight reduction operation of the lens barrel is realized through the design of the annular groove, the uniformity of the whole material of the lens can be realized, the shrinkage degree of the lens barrel can be reduced, and the size precision of the lens barrel is further ensured.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express the more specific and detailed embodiments described in the present application, but not be construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a mixed miniature lens is moulded to glass, includes lens cone (1), its characterized in that: the glass-plastic hybrid miniature lens further comprises a first lens (2), a first space ring (3), a second lens (4), a second space ring (5), a third lens (6) and a fourth lens (7) which are arranged in the lens barrel (1) from the object side to the image side in sequence, wherein:

the first lens (2) is a plastic double-concave lens;

the second lens (4) is a glass biconvex lens;

the first space ring (3) is abutted against the first lens (2) and the second lens (4) for limiting;

the third lens (6) is a plastic biconvex lens;

the fourth lens (7) is a plastic negative crescent lens and is abutted against the inner wall of the lens cone (1) for limiting;

and the second space ring (5) is abutted and limited with the second lens (4) and the third lens (6) respectively.

2. The glass-plastic hybrid miniature lens of claim 1, characterized in that: the glass-plastic mixed miniature lens further meets the following conditions:

3.96mm≤f1≤4.37mm，6.98mm≤f2≤7.72mm，2.99mm≤f3≤3.31mm，-4.86mm≤f4≤-4.40mm；

wherein f1, f2, f3 and f4 sequentially represent focal lengths of the first lens (2), the second lens (4), the third lens (6) and the fourth lens (7).

3. The glass-plastic hybrid miniature lens of claim 1, characterized in that: the glass-plastic mixed miniature lens further meets the following conditions:

1.46≤nd1≤1.61，1.44≤nd2≤1.59，1.46≤nd3≤1.61，1.55≤nd4≤1.72；

where nd1, nd2, nd3, and nd4 denote refractive indices of the first lens (2), the second lens (4), the third lens (6), and the fourth lens (7) in this order.

4. The glass-plastic hybrid miniature lens of claim 1, characterized in that: the glass-plastic mixed miniature lens further meets the following conditions:

52.93≤vd1≤58.50，60.99≤vd2≤67.41，52.93≤vd3≤58.50，22.77≤vd4≤25.17；

wherein vd1, vd2, vd3 and vd4 represent the dispersion values of the first lens (2), the second lens (4), the third lens (6) and the fourth lens (7) in this order.

5. The glass-plastic hybrid miniature lens of claim 1, characterized in that: the outer wall of the lens cone (1) is provided with threads (8).

6. The glass-plastic hybrid miniature lens of claim 1, characterized in that: the lens cone (1) is further provided with a light blocking hole (9), and the light blocking hole (9) is located on the image side of the fourth lens (7).

7. The glass-plastic hybrid miniature lens of claim 1, characterized in that: the image side of the lens cone (1) is also provided with an annular groove (10).

8. The glass-plastic hybrid miniature lens of claim 1, characterized in that: the first lens (2), the third lens (6) and the fourth lens (7) are all aspheric lenses, and the second lens (4) is a spherical lens.