CN202433589U - Novel large-view-field low-distortion wide-angle monitoring lens - Google Patents
Novel large-view-field low-distortion wide-angle monitoring lens Download PDFInfo
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- CN202433589U CN202433589U CN2011203756629U CN201120375662U CN202433589U CN 202433589 U CN202433589 U CN 202433589U CN 2011203756629 U CN2011203756629 U CN 2011203756629U CN 201120375662 U CN201120375662 U CN 201120375662U CN 202433589 U CN202433589 U CN 202433589U
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Abstract
The utility model relates to a field of video monitoring and especially relates to a novel large-view-field low-distortion wide-angle monitoring lens adopts a counter long distance structure. The novel large-view-field low-distortion wide-angle monitoring lens includes, along an optical axis from an objective side, a front group having negative focal power, a rear group having positive focal power and a receiving device. The rear group includes six pieces of lenses, wherein a fourth lens and a fifth lens are glued together to form a double gluing lens unit. A picture is received by a CCD after the picture is imaged through the monitoring lens. No aperture diaphragm is arranged separately in the system and a framework of the fourth lens in the rear group functions as the aperture diaphragm. The novel large-view-field low-distortion wide-angle monitoring lens provided by the utility model can suit for special occasions and has long working distance, small dimensional size and good imaging quality.
Description
Technical field
The present invention relates to field of video monitoring, relate in particular to the low distortion in a kind of novel big visual field wide-angle monitoring camera lens, comprise preceding group, back group and CCD receiver.
Background technology
In mankind's perception to external world, vision is can cause human sympathetic response, excite the human imagination and can at utmost transmit the information perception mode.Visual information is people by one of main source of objective world acquired information, accounts for people and relies on 70% of face acquired information, and the ocular effect that is therefore provided by image is not that language and text description can reach.Video image is actually continuous still image sequence, is the description vivid, lively to objective things, is a kind of expression way more directly perceived and concrete.Along with the fast development of network, communication and microelectric technique, characteristics such as video monitoring system is directly perceived with it, convenient and abundant in content receive people's attention day by day.
Supervisory system generally all is made up of video acquisition, information processing, three parts of information management.And video acquisition system is the key link in these three parts, if its resolution characteristic is limited, even the information processing capability of back powerful more also be of no avail.The vitals of decision image quality is exactly a camera lens in the video acquisition system.And want to obtain big monitoring range as the camera lens of supervisory system, will realize with wide-angle lens.
Summary of the invention
In order to enlarge the monitoring range of video monitoring camera lens, the present invention has designed the low distortion in a kind of novel big visual field wide-angle monitoring camera lens, has effectively improved the ability of monitoring, has effectively overcome the problem of image field edge illumination and more serious barrel distortion simultaneously.
The lens face type is a sphere all, has saved the processing cost of lens, has satisfied the designing requirement of big visual field.Less from the weight of its system of Optimization result, simple in structure, and axle is gone up point, off-axis point all reaches than higher image quality, for the design of wide-angle photographic lens provides a kind of new method.
For achieving the above object, the technical scheme that the present invention adopts is:
The low distortion in a kind of novel big visual field wide-angle monitoring camera lens; It is characterized in that: comprise comprising with negative power preceding group 1 and back group 8 and receiving device 9 along optical axis from object space with positive light coke; Wherein the frame of the 4th lens 5 in the back group 8 constitutes aperture diaphragm; The clear aperture of lens is the size of aperture diaphragm, with the CCD device as receiving device 9.
First preferred version of the present invention does, preceding group 1 is made up of simple lens, and focal power is for negative.
Second preferred version of the present invention does, back group 8 focal powers are being for just, is made up of first lens 2, second lens 3, the 3rd lens 4, the 4th lens 5, the 5th lens 6 and the 6th lens 7, and wherein the 4th lens 5 and the 5th lens 6 compose the cemented doublet group.
The 4th preferred version of the present invention is that aperture diaphragm is the frame with the 4th lens 5.
The 5th preferred version of the present invention does, f '=13mm, F/3,2w=± 35 °, the form that adopts negative positive lens groups to separate.
Description of drawings
Fig. 1 is the wide-angle monitoring lens construction figure of present embodiment.
Embodiment
The present invention is mainly used in the monitoring Image intake device, and the monitoring camera lens images in object on the image sensing component, and described image sensing component is charge-coupled image sensor (Charge Coupled Device is called for short CCD).
Fig. 1 is the structural drawing of the low distortion in this novel big visual field wide-angle monitoring camera lens.Designed a kind of novel big visual field wide-angle monitoring camera lens, group 1, back group 8 and CCD receiver 9 before comprising.
The present invention comprises with negative power preceding group 1 and back group 8 and receiving device 9 with positive light coke along optical axis from object space, preceding group 1 is made up of simple lens, and focal power is for negative; Back group 8 is made up of first lens 2, second lens 3, the 3rd lens 4, the 4th lens 5, the 5th lens 6 and the 6th lens 7; Wherein the 4th lens 5 and the 5th lens 6 compose the cemented doublet group; The frame of the 4th lens 5 is as aperture diaphragm, and the clear aperture of lens is the size of aperture diaphragm.
The present invention adopts anti-long distance structure, form jointly with the back group of institute that is positioned at the rear by being positioned at preceding group of the place ahead, and the spacing of two groups of lens combinations is less than the focal length of preceding group of lens combination.Be positioned at the place ahead owing to play negative group of lens combination of disperse function; So the picture side of this optical system principal plane moves backward, even move to the rear on summit behind the camera lens, thereby make the focal length of this camera lens be far smaller than the back work distance of camera lens; System's illuminance of image plane is necessarily improved, and imaging capability is preferably arranged.
Claims (4)
1. a novel big visual field low distortion wide-angle is monitored camera lens; It is characterized in that: comprise back group (8) and the receiving device (9) that comprise preceding group (1) along optical axis from object space and have positive light coke with negative power; Wherein the frame of the 4th lens (5) in the back group (8) constitutes aperture diaphragm; The clear aperture of lens is the size of aperture diaphragm, with the CCD device as receiving device (9).
2. the low distortion in a kind of novel big visual field as claimed in claim 1 wide-angle monitoring camera lens, it is characterized in that: preceding group (1) is made up of simple lens, and focal power is for negative.
3. the low distortion in a kind of novel big visual field as claimed in claim 1 wide-angle monitoring camera lens; It is characterized in that: group (8) focal power in back is for just; Be made up of first lens (2), second lens (3), the 3rd lens (4), the 4th lens (5), the 5th lens (6) and the 6th lens (7), wherein the 4th lens (5) and the 5th lens (6) compose the cemented doublet group.
4. the low distortion in a kind of novel big visual field as claimed in claim 1 wide-angle monitoring camera lens, it is characterized in that: aperture diaphragm is the frame with the 4th lens (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203756629U CN202433589U (en) | 2011-09-28 | 2011-09-28 | Novel large-view-field low-distortion wide-angle monitoring lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203756629U CN202433589U (en) | 2011-09-28 | 2011-09-28 | Novel large-view-field low-distortion wide-angle monitoring lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202433589U true CN202433589U (en) | 2012-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203756629U Expired - Fee Related CN202433589U (en) | 2011-09-28 | 2011-09-28 | Novel large-view-field low-distortion wide-angle monitoring lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202433589U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102346289A (en) * | 2011-09-28 | 2012-02-08 | 无锡艾德里安科技有限公司 | Novel wide-angle monitoring lens with large field of view and low distortion |
| TWI624681B (en) * | 2015-05-14 | 2018-05-21 | 鴻海精密工業股份有限公司 | Wild angle focus lens |
-
2011
- 2011-09-28 CN CN2011203756629U patent/CN202433589U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102346289A (en) * | 2011-09-28 | 2012-02-08 | 无锡艾德里安科技有限公司 | Novel wide-angle monitoring lens with large field of view and low distortion |
| CN102346289B (en) * | 2011-09-28 | 2016-05-18 | 浙江知夫子信息科技有限公司 | The low distortion wide angle monitoring lens in a kind of large visual field |
| TWI624681B (en) * | 2015-05-14 | 2018-05-21 | 鴻海精密工業股份有限公司 | Wild angle focus lens |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120912 Termination date: 20130928 |