CN204855922U - Wide -angle camera lens - Google Patents
Wide -angle camera lens Download PDFInfo
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- CN204855922U CN204855922U CN201520438796.9U CN201520438796U CN204855922U CN 204855922 U CN204855922 U CN 204855922U CN 201520438796 U CN201520438796 U CN 201520438796U CN 204855922 U CN204855922 U CN 204855922U
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- lens
- glass
- wide
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- protruding
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Abstract
The utility model discloses a wide -angle camera lens, including front surface mirror group, diaphragm and rear mirror group, front surface mirror group includes first lens, second lens, third lens and fourth lens in proper order to the object space is the place ahead, protruding recurve aspheric surface glass lens before first lens are, the falcate glass aspherical lens of concave recurve before the second lens are, the protruding glass lens in protruding back before the third lens are, the flat glass lens in protruding back before the fourth lens are, rear mirror group includes the 5th lens, VI lenses, the 7th lens and the 8th lens in proper order to the object space is the place ahead, the 5th lens are the protruding glass lens in preceding flat back, the protruding glass lens in concave back before VI lenses is, the 5th lens and VI lenses glue each other, protruding recurve glass lens before the 7th lens are, protruding and the aspheric surface glass lens in protruding back before the 8th lens are, the utility model discloses high temperature resistant, resistant high wet, resistant scraping has the super large visual angle, no optical distortion, low colour difference.
Description
Technical field
The utility model relates to monitoring camera, especially a kind of wide-angle lens.
Background technology
Along with people's improving constantly social safety attention degree, supervisory system is widely used in every field.The general field angle of current safety monitoring camera lens is less, is difficult to the requirement meeting large-range monitoring; On the other hand, camera lens is by the impact of environment for use, and such as in high-temperature high-humidity environment, lens performance reduces, and serviceable life also can be affected.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of wide-angle lens, and it is high temperature resistant, resistance to high humidity, and scratch-resistant has super large visual angle, without optical distortion, and low aberration.
For achieving the above object, the technical solution of the utility model is: a kind of wide-angle lens, comprise front lens group, diaphragm and rear mirror group, described front lens group comprises the first lens, the second lens, the 3rd lens and the 4th lens successively along optical axis direction from object space, take object space as front, described first lens are lordosis recurve aspherical glass lens, described second lens are the falcate glass aspheric lenses of front recessed recurve, described 3rd lens are convex glass lens after lordosis, and described 4th lens are flat glass lens after lordosis;
Described rear mirror group optical axis direction comprises the 5th lens, the 6th lens, the 7th lens and the 8th lens successively from object space, take object space as front, described 5th lens are front flat rear convex glass lens, described 6th lens are front recessed rear convex glass lens, described 5th lens and the 6th lens glue together mutually, described 7th lens are lordosis recurve glass lens, and described 8th lens are convex after lordosis and aspherical glass lens.
Preferably the refractive index of described 3rd lens is N
3, N
3meet the following conditions: 1.90 < N
3< 1.92.
Preferably the abbe number of described 5th lens is V
d, V
dmeet the following conditions: 80 < V
d< 81.
Preferred described front lens group focal length is f
l1, described rear mirror group focal length is f
l2, f
l1and f
l2meet the following conditions: 1.0 < | f
l1/ f
l2| < 1.2.
Preferably described first focal length of lens is f
a, described 8th focal length of lens is f
b, f
awith f
bmeet the following conditions: 0.7 < | f
a/ f
b| < 0.8.
Preferably described first focal length of lens is f
a, f
ameet the following conditions: | f
a| > 7.5mm; Described 8th focal length of lens is f
b, f
bmeet the following conditions: | f
b| > 10mm.
Preferably the refractive index of described first lens is N
1, N
1meet the following conditions: 1.65 < N
1< 1.80; The refractive index of described 8th lens is N
8, meet the following conditions: 1.65 < N
8< 1.80.
Preferably the spacing of described first lens and the second lens is 3.5mm to 4.5mm.
Spacing preferably between described 7th lens and the 8th lens is 0.1mm to 1.1mm.
The utility model front lens group comprises four lens, and rear mirror group comprises four lens; First lens adopt the aspherical glass lens of lordosis recurve, ensure the Large visual angle angle of camera lens; Described second lens are that the falcate glass aspheric lenses of front recessed recurve disappears astigmatism, the curvature of field and optical distortion; Described 5th lens and the 6th lens are coordinated mutually to glue together, color difference eliminating; Coordinate the 8th lens to be biconvex aspheric glass lens, eliminate astigmatism, aberration and F-Theta distortion further; Further, camera lens improves the structural strength of camera lens after all using glass lens, camera lens is high temperature resistant, resistance to high humidity, scratch-resistant.The utility model also has the high feature of resolution.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and concrete embodiment, the utility model is described in further detail.
Shown in Fig. 1, a kind of wide-angle lens, from object space, front lens group 10, diaphragm 20 and rear mirror group 30 is comprised along optical axis direction, described front lens group 10 comprises the first lens 1, second lens 2, the 3rd lens 3 and the 4th lens 4 successively along optical axis direction from object space, take object space as front, described first lens 1 are the aspherical glass lens of lordosis recurve, described second lens 2 are the falcate glass aspheric lenses of front recessed recurve, described 3rd lens 3 are convex glass lens after lordosis, and described 4th lens 4 are flat glass lens after lordosis; The spacing of described first lens 1 and the second lens 2 is 3.5mm to 4.5mm; The refractive index of described first lens 1 is N
1, preferred N
1meet the following conditions: 1.65 < N
1< 1.80; Take object space as front, described first lens 1 are second of described first lens 1 away from the plane of refraction of object space, and second angle is between 53 ° to 56 °, and the field angle of camera lens can reach 112 °; The refractive index of described 3rd lens 3 is N
3, preferred N
3meet the following conditions: 1.90 < N
3< the 1.92, three lens 3 select high-index material to improve resolution.
Described rear mirror group 30 optical axis direction comprises the 5th lens 5, the 6th lens 6, the 7th lens 7 and the 8th lens 8 successively from object space, take object space as front, and described 5th lens 5 are front flat rear convex glass lens, and described 6th lens 6 are front recessed rear convex glass lens; In order to achromatism, the abbe number of described 5th lens 5 is V
d, preferred V
dmeet the following conditions: 80 < V
d< 81, described 5th lens 5 and the 6th lens 6 glue together mutually; Described 7th lens 7 are lordosis recurve glass lens, and described 8th lens 8 are convex after lordosis and aspherical glass lens distort with the astigmatism that disappears, aberration and F-Theta; Spacing between described 7th lens 7 and the 8th lens 8 is 0.1mm to 1.1mm; The refractive index of described 8th lens 8 is N
8, preferably 1.65 < N
8< 1.80.
Preferred described front lens group 10 focal length is f
l1, described rear mirror group 30 focal length is f
l2, f
l1and f
l2meet the following conditions: 1.0 < | f
l1/ f
l2| < 1.2.
Preferably described first lens 1 focal length is f
a, described 8th lens 8 focal length is f
b, f
awith f
bmeet the following conditions: 0.7 < | f
a/ f
b| < 0.8.
Preferably described first lens 1 focal length is f
a, f
ameet the following conditions: | f
a| > 7.5mm; Described 8th lens 8 focal length is f
b, f
bmeet the following conditions: | f
b| > 10mm.
The present embodiment can reach following parameter: the overall length of camera lens, at below 26mm, meets the requirement that market is shorter and shorter to consumption eka-ytterbium head; Image planes are 1/2.3 " time FOV be greater than 112 °, optical distortion is less than 5%, meets the requirement of market to the undistorted camera lens of wide-angle; For meet security protection, consumer camera lens high temperature resistant, resistance to high humidity, the performance of Anti-scratching, first eyeglass adopts lanthanide glass material; The resolution of security lens is generally in 1,000,000 levels on the market, and the resolution of this camera lens reaches 8M level; For reducing cost, camera lens adopts 8 lens, all adopts glass mirror, meets security protection, the consumer camera lens stable demand used in the presence of a harsh environment.
Below be only the utility model preferred embodiment, those skilled in the art makes by claim the protection domain that equivalent change all falls into this case.
Claims (9)
1. a wide-angle lens, comprise front lens group, diaphragm and rear mirror group, it is characterized in that: described front lens group comprises the first lens, the second lens, the 3rd lens and the 4th lens successively along optical axis direction from object space, take object space as front, described first lens are lordosis recurve aspherical glass lens, described second lens are the falcate glass aspheric lenses of front recessed recurve, and described 3rd lens are convex glass lens after lordosis, and described 4th lens are flat glass lens after lordosis;
Described rear mirror group comprises the 5th lens, the 6th lens, the 7th lens and the 8th lens successively along optical axis direction from object space, take object space as front, described 5th lens are front flat rear convex glass lens, described 6th lens are front recessed rear convex glass lens, described 5th lens and the 6th lens glue together mutually, described 7th lens are lordosis recurve glass lens, and described 8th lens are convex after lordosis and aspherical glass lens.
2. a kind of wide-angle lens according to claim 1, is characterized in that: the refractive index of described 3rd lens is N
3, N
3meet the following conditions: 1.90 < N
3< 1.92.
3. a kind of wide-angle lens according to claim 1, is characterized in that: the abbe number of described 5th lens is V
d, V
dmeet the following conditions: 80 < V
d< 81.
4. a kind of wide-angle lens according to claim 1, is characterized in that: described front lens group focal length is f
l1, described rear mirror group focal length is f
l2, f
l1and f
l2meet the following conditions: 1.0 < | f
l1/ f
l2| < 1.2.
5. a kind of wide-angle lens according to claim 1, is characterized in that: described first focal length of lens is f
a, described 8th focal length of lens is f
b, f
awith f
bmeet the following conditions: 0.7 < | f
a/ f
b| < 0.8.
6. a kind of wide-angle lens according to claim 1, is characterized in that: described first focal length of lens is f
a, f
ameet the following conditions: | f
a| > 7.5mm; Described 8th focal length of lens is f
b, f
bmeet the following conditions: | f
b| > 10mm.
7. a kind of wide-angle lens according to claim 1, is characterized in that: the refractive index of described first lens is N
1, N
1meet the following conditions: 1.65 < N
1< 1.80; The refractive index of described 8th lens is N
8, meet the following conditions: 1.65 < N
8< 1.80.
8. a kind of wide-angle lens according to claim 1, is characterized in that: the spacing of described first lens and the second lens is 3.5mm to 4.5mm.
9., according to the arbitrary described a kind of wide-angle lens of claim 1 to 8, it is characterized in that: the spacing between described 7th lens and the 8th lens is 0.1mm to 1.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520438796.9U CN204855922U (en) | 2015-06-25 | 2015-06-25 | Wide -angle camera lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520438796.9U CN204855922U (en) | 2015-06-25 | 2015-06-25 | Wide -angle camera lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204855922U true CN204855922U (en) | 2015-12-09 |
Family
ID=54746458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520438796.9U Active CN204855922U (en) | 2015-06-25 | 2015-06-25 | Wide -angle camera lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204855922U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106896473A (en) * | 2015-12-21 | 2017-06-27 | 康达智株式会社 | Pick-up lens |
-
2015
- 2015-06-25 CN CN201520438796.9U patent/CN204855922U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106896473A (en) * | 2015-12-21 | 2017-06-27 | 康达智株式会社 | Pick-up lens |
| CN106896473B (en) * | 2015-12-21 | 2021-05-11 | 康达智株式会社 | Camera lens |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170727 Address after: Xinyang Industrial Zone Xinmei road Xiamen City, Fujian province 361000 Haicang No. 26 Patentee after: Xiamen Leading Optics Co., Ltd. Address before: 361000 538B room, Xuan industrial building, pioneer zone, torch hi tech Zone, Fujian, Xiamen Patentee before: XIAMEN YUNZHITUO SCIENCE & TECHNOLOGY CO., LTD. |
|
| TR01 | Transfer of patent right | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 361000 26 Xinmei Road, Xinyang Industrial Zone, Haicang, Xiamen, Fujian Patentee after: Xiamen Li Ding Au Optronics Co Address before: 361000 26 Xinmei Road, Xinyang Industrial Zone, Haicang, Xiamen, Fujian Patentee before: Xiamen Leading Optics Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder |