CN202886718U - Wide-angle lens - Google Patents
Wide-angle lens Download PDFInfo
- Publication number
- CN202886718U CN202886718U CN201220463632.8U CN201220463632U CN202886718U CN 202886718 U CN202886718 U CN 202886718U CN 201220463632 U CN201220463632 U CN 201220463632U CN 202886718 U CN202886718 U CN 202886718U
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- Prior art keywords
- lens
- imaging
- wide
- glass
- angle lens
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Abstract
The application discloses a wide-angle lens, comprising a lens barrel. A plurality of imaging lenses are coaxially arranged in the lens barrel along the direction from the object space to the image space in sequence, all imaging lenses are plastic optical lenses, a non-imaging protection lens is arranged between the opening of the lens barrel and the first imaging lens, and the non-imaging protection lens is a glass lens with a uniform thickness. According to the application, all imaging lenses are plastic optical lenses, the glass lens is additionally provided only in front of the first lens to play as a protection lens, the protection lens is a non-imaging protection lens with a uniform thickness, on one hand, the precision requirement and material requirement in the machining process are not high, and product cost is reduced, on the other hand, the wear resistant and antioxidation capabilities of the glass lens are fully employed, the plastic optical lenses are effectively protected, and performance of the wide-angle lens at an outdoor severe environment is guaranteed, and the imaging quality is guaranteed.
Description
Technical field
The application relates to field of optical lens, relates in particular to a kind of wide-angle lens.
Background technology
Be applicable to drive a vehicle/the reverse image supervisory system, the wide-angle lens in camera monitoring system, photograph or the apparatus for making a video recording generally includes two kinds of lens structures, the all-glass eyeglass of a kind of employing, the another kind of eyeglass that adopts glass and plastic cement to mix, be that part adopts glass mirror in a plurality of eyeglasses, part adopts plastic lens.Which kind of lens structure no matter, first eyeglass that directly joins with external environment in the wide-angle lens all is glass mirror, as the part of optical imaging system in the wide-angle lens, this glass mirror this as the optical mirror slip with concave surface or convex configuration.
Yet in the wide-angle lens of this structure, first optical mirror slip that glass is made is had relatively high expectations for machining precision, causes the process costs of product higher, and because the supply rate restriction of glass raw material causes the material cost of product also higher.If first eyeglass adopts plastic lens, then because the material behavior of plastic lens is easy to cause scuffing in wiping, perhaps at high temperature, low temperature, be exposed to the sun, oxidation and impaired under the inclement weather environment such as wind and rain, image quality is caused certain influence.
Summary of the invention
The application provides a kind of reduction cost and non-damageable wide-angle lens.
The application provides a kind of wide-angle lens; comprise lens barrel; a plurality of imaging eyeglasses are installed successively coaxially along object space to picture side in described lens barrel inside; described imaging eyeglass all is plastic lens; non-imaging protection eyeglass also is installed between the described imaging eyeglass of the oral area of described lens barrel and first, and described non-imaging protection eyeglass is the glass mirror of even thickness.
Further, described glass mirror is circular arc, and its middle part is to the object space projection.
Further, the thickness of described glass mirror is less than 1mm.
The application's beneficial effect is: all optical mirror slips in the application's the wide-angle lens all adopt plastic lens; only increase glass mirror in the first eyeglass front as the protection eyeglass; and this protection eyeglass is the non-imaging eyeglass of even thickness; accuracy requirement and material requirements in process is not high on the one hand; reduced cost of products; can take full advantage of on the other hand wear-resistant, the oxidation resistance of glass mirror; plastic lens to other is effectively protected; to adapt to the usability of wide-angle lens under outdoor rugged surroundings, guarantee image quality.
Description of drawings
Fig. 1 is the cross-sectional schematic of the wide-angle lens of a kind of embodiment of the application.
Embodiment
By reference to the accompanying drawings the present invention is described in further detail below by embodiment.
In the embodiment of the present application, the imaging eyeglass that is used for optical imagery in the wide-angle lens all adopts plastic lens, between lens barrel oral area and the first molded lenses protection eyeglass is installed also, and this protection eyeglass adopts glass to make.
As shown in Figure 1, the wide-angle lens of present embodiment comprises lens barrel and the lens set and other elements that are installed in the lens barrel 2.Wherein lens barrel 2 forms cavity cylindraceous, and lens set is installed in cavity inside cylindraceous.Particularly, lens set comprises a plurality of imaging eyeglasses, these imaging eyeglasses adopt convex lens with certain focal length, concavees lens etc. according to concrete needs usually as the part of optical imaging system, these imaging eyeglasses are installed to picture side along object space successively coaxially in lens barrel inside, have rational spacing between the different imaging eyeglasses.In the present embodiment, these imaging eyeglasses all adopt plastic cement material, not only can satisfy the requirement of wide-angle lens aspect image quality, and because the market price of plastic material is lower than glass material, compare with the structure that plastic lens mixes with full glass mirror or glass mirror in the prior art, the wide-angle lens of present embodiment can significantly reduce material cost and process costs, and not limited by the supply rate of glass raw material.
In addition, because the even thickness of glass mirror distributes in the present embodiment, the requirement aspect machining precision is lower, has reduced to a certain extent process costs.
In the present embodiment, glass mirror is the circular arc of rule, and its middle part is to the object space projection, and to the direction projection away from plastic lens, owing to the even thickness of glass mirror, so the radius of outside surface and inside surface all is R1 in other words.The thickness T C of glass mirror is less than 1mm, and material can be selected BK7 glass, has good adhesion strength, can bring more and stablize, protects reliably effect.
The application's wide-angle lens not only provides cost savings, and not fragile, can adapt to outdoor inclement weather and environmental impact, guarantees good image quality, and prolongs mission life.
Above content is the further description of the present invention being done in conjunction with concrete embodiment, can not assert that implementation of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace.
Claims (3)
1. wide-angle lens; comprise lens barrel; it is characterized in that; a plurality of imaging eyeglasses are installed successively coaxially along object space to picture side in described lens barrel inside; described imaging eyeglass all is plastic lens; non-imaging protection eyeglass also is installed between the described imaging eyeglass of the oral area of described lens barrel and first, and described non-imaging protection eyeglass is the glass mirror of even thickness.
2. wide-angle lens as claimed in claim 1 is characterized in that, described glass mirror is circular arc, and its middle part is to the object space projection.
3. wide-angle lens as claimed in claim 1 or 2 is characterized in that, the thickness of described glass mirror is less than 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220463632.8U CN202886718U (en) | 2012-09-12 | 2012-09-12 | Wide-angle lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220463632.8U CN202886718U (en) | 2012-09-12 | 2012-09-12 | Wide-angle lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202886718U true CN202886718U (en) | 2013-04-17 |
Family
ID=48078127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220463632.8U Expired - Fee Related CN202886718U (en) | 2012-09-12 | 2012-09-12 | Wide-angle lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202886718U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112748513A (en) * | 2019-10-29 | 2021-05-04 | 宁波舜宇光电信息有限公司 | Camera module, optical lens thereof, optical lens and manufacturing method |
-
2012
- 2012-09-12 CN CN201220463632.8U patent/CN202886718U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112748513A (en) * | 2019-10-29 | 2021-05-04 | 宁波舜宇光电信息有限公司 | Camera module, optical lens thereof, optical lens and manufacturing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20180912 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |