CN112558279A - High-definition wide-angle lens - Google Patents
High-definition wide-angle lens Download PDFInfo
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- CN112558279A CN112558279A CN202011506339.0A CN202011506339A CN112558279A CN 112558279 A CN112558279 A CN 112558279A CN 202011506339 A CN202011506339 A CN 202011506339A CN 112558279 A CN112558279 A CN 112558279A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B17/00—Methods preventing fouling
- B08B17/02—Preventing deposition of fouling or of dust
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/026—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using retaining rings or springs
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B11/00—Filters or other obturators specially adapted for photographic purposes
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention discloses a high-definition wide-angle lens, which comprises a lens barrel, wherein a first lens, a second lens, a third lens and a fourth lens are sequentially arranged in the lens barrel from an object space to an image space, the first lens and the second lens are glass lenses, the concave surface of the first lens faces to the image space, and the first lens has negative focal power: the second lens is a biconvex lens, has positive focal power, and image space one side of the fourth lens is provided with a light filter, and the third lens and the fourth lens are glued to form a combined lens, and the third lens and the fourth lens are plastic aspheric lens, and the third lens is a biconvex lens, and has positive focal power: the concave surface of the fourth lens faces the object, and the fourth lens has negative focal power, and has the advantages of low cost, light weight, small size, no thermalization, compact structure, high resolution, long working distance and wide working temperature range, the real-time image deformation of the camera module is small, and the imaging definition of the lens can be well maintained in high and low temperature environments.
Description
Technical Field
The invention relates to the technical field of optical lenses, in particular to a high-definition wide-angle lens.
Background
Modern imaging devices have been widely used in various fields, and when the imaging devices are used in some specific fields, a wide-angle lens is required to increase the field of view. With the rapid rise of the security monitoring market in this year and the optimized improvement of digital processing and network transmission speed, the quality requirement on the security monitoring lens is greatly improved, and the identification is carried out from the common monitoring requirement to high definition. The lens is an optical component for producing an image in a film camera or a projector, and is also called an optical lens, and is classified mainly into a japanese lens and a german lens according to the origin of the lens. The Japanese lens mainly has good color reducibility, and the German lens has strong layering. The lens in China in the market also gradually occupies a certain market, the price is low, and the wide-angle lens is an important component of some large-field-of-view items, such as a monitoring device and a vehicle-mounted wide-angle imaging system.
The wide-angle lens is a photographic lens with a focal length shorter than that of a standard lens, a visual angle larger than that of the standard lens, a focal length longer than that of a fisheye lens and a visual angle smaller than that of the fisheye lens. The wide-angle lens is divided into a common wide-angle lens and an ultra wide-angle lens. The focal length of a common wide-angle lens is generally 38-24 mm, and the visual angle is 60-84 degrees; the focal length of the super wide-angle lens is 20-13 mm, and the visual angle is 94-118 degrees. The wide-angle lens is also called as a short lens, and is a kind of auxiliary lens for photography. The focal length of the lens is obviously smaller than the diameter of an image field, the visual angle is larger than that of a standard lens, and the relative caliber is generally smaller. Wide-angle lenses were produced in the nineteenth sixties with the advent of fast direct-light lenses, and have evolved to become an important class of photographic lenses since then. Modern wide-angle lens optical group mainly has two forms of symmetrical structure and back focus structure, and the symmetrical wide-angle lens can be divided into two auxiliary types of positive outer lens and negative outer lens. The wide-angle lens has the advantages of short focal length and large visual angle, can shoot a wide scene at a short distance, has a more prominent prospect, has a depth of field range which is significantly larger than that of a standard lens and a telephoto lens, and has strong depth feeling of the picture. The camera is suitable for indoor short-distance shooting, mountains, buildings, crowds and other scenes, and can highlight the central main body and the foreground and have wide backgrounds. More scenes can be shot in a smaller environment, and the obtained scenes are smaller than those shot by a standard lens at the same shooting distance. When a close subject is photographed, perspective distortion occurs, and the sense of distance between the front and rear subjects is also increased. Because of its long depth of field, it is easy to shoot the scenery both near and far clearly, and can effectively represent the great atmosphere or the great ambition of the high-rise building into the clouds.
The existing high-definition wide-angle lens generally consists of 4 to 8 lenses, but the wide-angle lens has short working distance and is limited in high-low temperature and high-humidity environments, so that the requirements of customers on small size and high performance cannot be met, and the waterproof capability of the existing high-definition wide-angle lens is not outstanding enough.
Disclosure of Invention
The present invention is directed to a high definition wide-angle lens, which solves the above problems.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-definition wide-angle lens comprises a lens barrel, wherein a first lens, a second lens, a third lens and a fourth lens are sequentially arranged in the lens barrel from an object space to an image space, the lens barrel comprises a barrel body and a gland, the first lens is arranged at one end of the barrel body, the gland is arranged outside the first lens, the gland is in threaded connection with the barrel body, a diaphragm device is arranged between the first lens and the second lens, a fixing ring is fixedly connected to the outer side of the diaphragm device and movably connected with the barrel body, a first separation ring is arranged between the fixing ring and the first lens, the first separation ring is movably connected with the barrel body, a second separation ring is arranged between the fixing ring and the second lens and movably connected with the barrel body, clamping grooves corresponding to the diaphragm device and the second lens are respectively arranged on two sides of the second separation ring, and a third separation ring is arranged between the second lens and the third lens, third division circle and stack shell swing joint, third division circle both sides are provided with the draw-in groove that corresponds with second lens, third lens respectively, and the image space one side of fourth lens is provided with the light filter, be provided with fourth division circle between fourth lens and the light filter, fourth division circle and stack shell swing joint, fourth division circle both sides are provided with the draw-in groove that corresponds with fourth lens, light filter respectively, and the clamping ring is installed to image space one side of light filter, and stack shell one end fixedly connected with installation arch.
As a further scheme of the invention: the first lens and the second lens are glass lenses, the concave surface of the first lens faces the image space, and the first lens has negative focal power: the second lens is a double-convex lens and has positive focal power, VD1 is more than 48, VD2 is more than 45, wherein VD1 is the Abbe constant of the material of the first lens, and ND2 is the Abbe constant of the material of the second lens.
As a further scheme of the invention: the third lens and the fourth lens are glued to form a combined lens, the third lens and the fourth lens are plastic aspheric lenses, the third lens is a biconvex lens and has positive focal power: the concave surface of the fourth lens faces the object, has negative focal power, and satisfies-1.06 < f3/f4< -0.74, wherein f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, VD3 is VD4<35, VD3 is the Abbe constant of the material of the third lens, and VD4 is the Abbe constant of the material of the fourth lens.
As a further scheme of the invention: the lens and the first lens satisfy the following relationship: -1.9< f1/f < -1.15 wherein f1 is the focal length of the first lens and f is the lens focal length.
As a further scheme of the invention: a sealing gasket is arranged between the gland and the cylinder body, and a boss corresponding to the sealing gasket is arranged on the cylinder body.
As a further scheme of the invention: a sealing gasket is arranged between the first lens and the cylinder body, two sealing rings are arranged on one side of the boss of the cylinder body, and a groove corresponding to the sealing rings is formed in the cylinder body.
As a further scheme of the invention: two sealing rings are arranged between one side of the first lens object space and the gland, and grooves corresponding to the sealing rings are formed in one side of the first lens and the inner side wall of the gland.
As a further scheme of the invention: one end of the gland is movably sleeved with a dustproof soft cover, and one side of the dustproof soft cover is fixedly connected with a handle.
As a further scheme of the invention: the clamping ring is installed in the barrel body, the clamping ring is in threaded connection with the barrel body, a clamping groove corresponding to the optical filter is formed in one side of the clamping ring, and a rotating protrusion is fixedly arranged on the other side of the clamping ring.
As a further scheme of the invention: the inside and outside both sides of installation arch all are provided with sealed the pad, and barrel outer wall is provided with anti-skidding line.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention has the advantages of low cost, light weight, small size, no thermalization, compact structure, high resolution, long working distance and wide working temperature range, the real shooting picture of the camera module has small deformation, and the definition of the lens imaging can be better kept in high and low temperature environments;
2. the waterproof performance of the high-definition wide-angle lens is effectively improved through the arranged sealing gasket and the sealing ring, so that the high-definition wide-angle lens can work normally in rainy days;
3. the dustproof cover is convenient to seal when the lens is not used, so that dust is prevented from adhering to the surface of the first lens and affecting use;
4. the high-strength wide-angle lens is convenient to mount and dismount through the arranged gland and the pressing ring;
5. the rotary bulge is arranged to facilitate the rotation of the compression ring, so that the high-strength wide-angle lens can be mounted and dismounted;
6. the high-definition wide-angle lens is not easy to slip off from the hand during mounting and dismounting through the arranged anti-slip lines, so that the lens is prevented from being broken.
Drawings
Fig. 1 is a schematic view of a main view water-splitting structure of a high-definition wide-angle lens.
Fig. 2 is a schematic view of a high-definition wide-angle lens.
Fig. 3 is an enlarged schematic view of a in a high-definition wide-angle lens.
Fig. 4 is an enlarged schematic diagram of a structure B of a high-definition wide-angle lens.
In the figure: the lens comprises a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a lens barrel 5, a combined lens 6, a diaphragm device 7, a barrel body 8, a gland 9, a sealing gasket 10, a boss 11, a sealing ring 12, a groove 13, a dustproof soft cover 14, a handle 15, a fixing ring 16, a first spacing ring 17, a second spacing ring 18, a clamping groove 19, a third spacing ring 20, an optical filter 21, a fourth spacing ring 22, a pressing ring 23, a rotating protrusion 24, an installing protrusion 25 and anti-skid patterns 26.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 4, in an embodiment of the present invention, a lens barrel 5 is provided, in which a first lens 1, a second lens 2, a third lens 3, and a fourth lens 4 are sequentially installed from an object side to an image side in the lens barrel 5, the first lens 1 and the second lens 2 are glass lenses, a concave surface of the first lens 1 faces the image side, and has a negative focal power: the second lens 2 is a biconvex lens with positive focal power, VD1>48, VD2>45, wherein VD1 is the Abbe constant of the material of the first lens 1, ND2 is the Abbe constant of the material of the second lens 2, the third lens 3 and the fourth lens 4 are cemented to form a combined lens 6, the third lens 3 and the fourth lens 4 are plastic aspheric lenses, and the third lens 3 is a biconvex lens with positive focal power: the concave surface of the fourth lens 4 faces the object, has negative focal power, and satisfies-1.06 < f3/f4< -0.74, wherein f3 is the focal length of the third lens 3, f4 is the focal length of the fourth lens 4, VD3 is VD4<35, VD3 is the Abbe constant of the material of the third lens 3, and VD4 is the Abbe constant of the material of the fourth lens 4, and the lens and the first lens 1 satisfy the following relations: -1.9< f1/f < -1.15 wherein f1 is the focal length of the first lens 1 and f is the lens focal length.
The lens cone 5 comprises a cone body 8 and a gland 9, the first lens 1 is arranged at one end of the cone body 8, the gland 9 is arranged outside the first lens 1, the gland 9 is in threaded connection with the cone body 8, so that the high-strength wide-angle lens is convenient to mount and dismount, a sealing gasket 10 is arranged between the gland 9 and the cone body 8, a boss 11 corresponding to the sealing gasket 10 is arranged on the cone body 8, two sealing rings 12 are arranged on one side of the boss 11 of the cone body 8, a groove 13 corresponding to the sealing rings 12 is arranged on the cone body 8, the sealing gasket 10 is arranged between the first lens 1 and the cone body 8, two sealing rings 12 are arranged between one object side of the first lens 1 and the gland 9, grooves 13 corresponding to the sealing rings 12 are arranged on one side of the first lens 1 and the inner side wall of the gland 9, the sealing gasket 10 and the sealing rings 12 effectively improve the waterproof performance of the high-definition wide-angle lens, so that, the soft dustproof cover 14 is movably sleeved at one end of the gland 9, so that the lens is convenient to seal when not used, the first lens surface is prevented from being adhered by dust, the use is influenced, the handle 15 is fixedly connected to one side of the soft dustproof cover 14, and the soft dustproof cover 14 is convenient to take down.
A diaphragm device 7 is arranged between the first lens 1 and the second lens 2, a fixing ring 16 is fixedly connected to the outer side of the diaphragm device 7, the fixing ring 16 is movably connected with the barrel body 8, a first spacing ring 17 is arranged between the fixing ring 16 and the first lens 1, the first spacing ring 17 is movably connected with the barrel body 8, a second spacing ring 18 is arranged between the fixing ring 16 and the second lens 2, the second spacing ring 18 is movably connected with the barrel body 8, clamping grooves 19 corresponding to the diaphragm device 7 and the second lens 2 are respectively arranged on two sides of the second spacing ring 18, a third spacing ring 20 is arranged between the second lens 2 and the third lens 3, the third spacing ring 20 is movably connected with the barrel body 8, clamping grooves 19 corresponding to the second lens 2 and the third lens 3 are respectively arranged on two sides of the third spacing ring 20, an optical filter 21 is arranged on one side of an image side of the fourth lens 4, and a fourth spacing ring 22 is arranged between the fourth lens 4 and the fourth spacing ring 21, the fourth separating ring 22 is movably connected with the barrel 8, two sides of the fourth separating ring 22 are respectively provided with a clamping groove 19 corresponding to the fourth lens 4 and the optical filter 21, one image side of the optical filter 21 is provided with a pressing ring 23, the pressing ring 23 is arranged in the barrel 8, the pressing ring 23 is in threaded connection with the barrel 8, so that the high-strength wide-angle lens is convenient to mount and dismount, one side of the pressing ring 23 is provided with the clamping groove 19 corresponding to the optical filter 21, the other side of the pressing ring 23 is fixedly provided with a rotating bulge 24 which is convenient to rotate the pressing ring 23, the high-strength wide-angle lens is mounted and dismounted, one end of the barrel 8 is fixedly connected with a mounting bulge 25, the inner side and the outer side of the mounting bulge 25 are both provided with sealing gaskets 10, the waterproof performance of the high-definition wide-angle lens is further improved, the high-definition wide-angle lens can normally work in rainy weather, the lens is prevented from being broken. The invention has the advantages of low cost, light weight, small size, no thermalization, compact structure, high resolution, long working distance and wide working temperature range, the real shooting picture of the camera module has small deformation, and the definition of the lens imaging can be better kept in high and low temperature environments.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (10)
1. The high-definition wide-angle lens comprises a lens barrel (5) and is characterized in that a first lens (1), a second lens (2), a third lens (3) and a fourth lens (4) are sequentially installed from an object space to an image space in the lens barrel (5), the lens barrel (5) comprises a barrel body (8) and a gland (9), the first lens (1) is installed at one end of the barrel body (8), the gland (9) is installed outside the first lens (1), the gland (9) is in threaded connection with the barrel body (8), a diaphragm device (7) is installed between the first lens (1) and the second lens (2), a fixing ring (16) is fixedly connected to the outer side of the diaphragm device (7), the fixing ring (16) is movably connected with the barrel body (8), a first partition ring (17) is arranged between the fixing ring (16) and the first lens (1), and the first partition ring (17) is movably connected with the barrel body (8), a second separation ring (18) is arranged between the fixing ring (16) and the second lens (2), the second separation ring (18) is movably connected with the barrel body (8), clamping grooves (19) corresponding to the diaphragm device (7) and the second lens (2) are respectively arranged on two sides of the second separation ring (18), a third separation ring (20) is arranged between the second lens (2) and the third lens (3), the third separation ring (20) is movably connected with the barrel body (8), the clamping grooves (19) corresponding to the second lens (2) and the third lens (3) are respectively arranged on two sides of the third separation ring (20), an optical filter (21) is arranged on one side of an image space of the fourth lens (4), a fourth separation ring (22) is arranged between the fourth lens (4) and the optical filter (21), the fourth separation ring (22) is movably connected with the barrel body (8), and two sides of the fourth separation ring (22) are respectively provided with the fourth lens (4), The filter (21) corresponds to the clamping groove (19), the image side of the filter (21) is provided with a pressing ring (23), and one end of the barrel body (8) is fixedly connected with a mounting bulge (25).
2. A high definition wide-angle lens according to claim 1, characterized in that the first lens (1) and the second lens (2) are glass lenses, the concave surface of the first lens (1) faces the image side, and the first lens has negative power: the second lens (2) is a double-convex lens with positive focal power, VD1>48 and VD2>45, wherein VD1 is the Abbe constant of the material of the first lens (1), and ND2 is the Abbe constant of the material of the second lens (2).
3. A high definition wide-angle lens according to claim 1, wherein the third lens (3) and the fourth lens (4) are cemented to form a combined lens (6), the third lens (3) and the fourth lens (4) are plastic aspheric lenses, the third lens (3) is a biconvex lens with positive power: the concave surface of the fourth lens (4) faces the object, has negative focal power, and meets the conditions of-1.06 < f3/f4< -0.74, wherein f3 is the focal length of the third lens (3), f4 is the focal length of the fourth lens (4), VD3 is VD4<35, VD3 is the material Abbe constant of the third lens (3), and VD4 is the material Abbe constant of the fourth lens (4).
4. A high definition wide-angle lens according to claim 1, characterized in that the lens and the first lens (1) satisfy the following relation: -1.9< f1/f < -1.15 wherein f1 is the focal length of the first lens (1) and f is the lens focal length.
5. A high definition wide-angle lens according to claim 1, characterized in that a sealing gasket (10) is arranged between the gland (9) and the barrel (8), and a boss (11) corresponding to the sealing gasket (10) is arranged on the barrel (8).
6. A high definition wide-angle lens according to claim 5, characterized in that a sealing gasket (10) is arranged between the first lens (1) and the barrel (8), the barrel (8) is provided with two sealing rings (12) on one side of the boss (11), and the barrel (8) is provided with a groove (13) corresponding to the sealing ring (12).
7. A high definition wide-angle lens according to claim 1, characterized in that two sealing rings (12) are arranged between the object side of the first lens (1) and the gland (9), and a groove (13) corresponding to the sealing ring (12) is arranged on one side of the first lens (1) and the inner side wall of the gland (9).
8. The high-definition wide-angle lens according to claim 1, wherein a dust-proof soft cover (14) is movably sleeved at one end of the pressing cover (9), and a handle (15) is fixedly connected to one side of the dust-proof soft cover (14).
9. The high-definition wide-angle lens according to claim 1, wherein the pressing ring (23) is installed in the barrel body (8), the pressing ring (23) is in threaded connection with the barrel body (8), a clamping groove (19) corresponding to the optical filter (21) is formed in one side of the pressing ring (23), and a rotating protrusion (24) is fixedly arranged on the other side of the pressing ring (23).
10. A high definition wide-angle lens according to claim 1, characterized in that the inner and outer sides of the mounting protrusion (25) are provided with sealing gaskets (10), and the outer wall of the barrel body (8) is provided with anti-skid lines (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011506339.0A CN112558279A (en) | 2020-12-18 | 2020-12-18 | High-definition wide-angle lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011506339.0A CN112558279A (en) | 2020-12-18 | 2020-12-18 | High-definition wide-angle lens |
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| Publication Number | Publication Date |
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| CN112558279A true CN112558279A (en) | 2021-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011506339.0A Pending CN112558279A (en) | 2020-12-18 | 2020-12-18 | High-definition wide-angle lens |
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| CN (1) | CN112558279A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113391420A (en) * | 2021-05-28 | 2021-09-14 | 江西晶超光学有限公司 | Lens, camera module, electronic equipment and mould |
| TWI824639B (en) * | 2022-07-18 | 2023-12-01 | 大陸商玉晶光電（廈門）有限公司 | Lens barrel |
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| CN210323532U (en) * | 2019-08-21 | 2020-04-14 | 深圳看到科技有限公司 | High-definition fisheye lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113391420A (en) * | 2021-05-28 | 2021-09-14 | 江西晶超光学有限公司 | Lens, camera module, electronic equipment and mould |
| TWI824639B (en) * | 2022-07-18 | 2023-12-01 | 大陸商玉晶光電（廈門）有限公司 | Lens barrel |
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Application publication date: 20210326 |
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