CN202815292U - CCTV fixed-focus lens being able to adjust core shift among groups - Google Patents
CCTV fixed-focus lens being able to adjust core shift among groups Download PDFInfo
- Publication number
- CN202815292U CN202815292U CN201220432192.XU CN201220432192U CN202815292U CN 202815292 U CN202815292 U CN 202815292U CN 201220432192 U CN201220432192 U CN 201220432192U CN 202815292 U CN202815292 U CN 202815292U
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- lens combination
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Abstract
The utility model discloses a CCTV fixed-focus lens being able to adjust the core shift among groups, comprising a main lens barrel, a lens group I and a lens group II which are axially arranged in the main lens barrel. The CCTV fixed-focus lens being able to adjust the core shift among groups is characterized in that the lens group II is arranged in the main lens barrel through a focusing barrel group II, three core adjusting screw holes are uniformly distributed on the circumference of the side wall of the focusing barrel group II, the side wall of the main lens barrel is provided with three core-adjusting position-providing grooves corresponding to the core adjusting screw holes, core adjusting screws are arranged in the core adjusting screw holes, and the bottoms of the screws are supported against the side wall of the lens group II. According to the utility model, the structure is simple, cost is low, an operator can adjust the three core adjusting screws arranged on the focusing barrel group II to adjust the core shift amount between the lens group II and the lens group I caused by an installation error and an element processing error, no element dismounting is required, the operation is simple and easy to understand, and element damage and abandonment are prevented.
Description
(1) technical field:
The utility model relates to a kind of CCTV tight shot, particularly the CCTV tight shot of core shift between a kind of adjustable group.
(2) background technology:
In recent years, be accompanied by the development of monitoring trade, the CCTV camera lens more and more receives each camera lens production firm and engineering contractor's concern.The CCTV camera lens is as the important component part of supervisory system, and is more professional, stricter to the image quality requirement of its camera lens.
In general between eyeglass, trickle error all can produce very large off-centre between eyeglass and lens barrel and between a plurality of lens barrel, causes resolving power to descend, and affects the production of camera lens because the assembling susceptibility of optical lens is all very high.Therefore how to reduce as much as possible rigging error, promote resolving power and will become the problem that must solve in the optical lens production run.And transfer the core mode can solve well the core shift problem, finish optics to core.
Existing general camera lens all is to carry out the adjustment of core shift between the group by the angle between the rotation group.Common way is with a packing ring and fixed leg the front and back group to be linked together, check first when making between two groups the core shift amount whether within the acceptable range, when if the core shift amount is excessive, packing ring and fixed leg are pulled down, and the angle that rear group's rotation of lens is certain (for example rotating 120 degree or 240 degree), again rear group's lens assembling is got up, and then check its core shift amount; Also have plenty of by a rotation and transfer cored structure to carry out this process, exactly pre-group camera lens and an abutment ring are fixed, rear group's camera lens then links to each other with this abutment ring by joint pin etc., only dismantles joint pin during rotation, fixed test again behind group camera lens behind the integral-rotation.Yet this dual mode all includes the program of a dismounting, and required man-hour is longer, also can cause the damage of parts in the process of dismounting, causes and scraps, and increases manufacturing cost.Therefore, how to design that a kind of to transfer core operation lens construction simple and easy, that reduce the eyeglass damage be the task of top priority.
(3) utility model content:
In order to overcome the deficiencies in the prior art, the purpose of this utility model provide a kind of simple in structure, cost is low, transfer the core operation simple and easy, can effectively reduce the eyeglass damage, reduce the lens construction of scrappage.
The utility model is to realize by following technical scheme: the CCTV tight shot of core shift between a kind of adjustable group, comprise body tube and be located in body tube interior a group lens combination, two groups of lens combination, it is characterized in that: described two groups of lens combination are installed in the body tube by two groups of focusing drums, circumferentially be evenly distributed with three on two groups of focusing drum sidewalls and transfer the core screw, having three on the body tube sidewall transfers the core slot to make way and transfers the core screw corresponding, transfer to be equipped with in the core screw and transfer the core screw, transfer top, core screw bottom to terminate on two groups of lens combination sidewalls.
Two groups of focusing drums described above comprise the first continuous accommodating cavity and the second accommodating cavity, described two groups of lens combination are installed in the second accommodating cavity, described a group lens combination top is fixedly mounted on the body tube, the latter half of of a group lens combination extend in the first accommodating cavity, and the first accommodating cavity front end is provided with focusing system.
Focusing system described above comprises the curve cylinder and the focusing drum that are mutually permanently connected that is installed in outside the described body tube, described body tube sidewall is provided with axial straight trough, the curve cylinder is provided with helical guide channel, and the anterior sidewall of the first accommodating cavity is provided with direction protrusion and is inserted in helical guide channel and the axial straight trough.
A group lens combination described above rear end is equipped with the aperture assembly, and the sidewall of described the first accommodating cavity rear end is provided with a circumferential groove, is provided with accordingly the aperture groove with circumferential groove on the sidewall of body tube middle part; The body tube outside is provided with the aperture adjustment barrel, and the aperture driving lever of described aperture assembly is connected with the aperture adjustment barrel after passing circumferential groove, aperture groove.
Compared with prior art, the utility model has following advantage: the utility model is simple in structure, cost is low, the operator only need lens barrel outside by adjusting be installed on two groups of focusing drums three transfer the core screws adjust between two groups of lens combination and a group lens combination owing to alignment error, the caused core shift amount of part's machining errors, need not carry out the element dismounting, simple to operate understandable, can not produce the parts damage and scrap.Latter half of first accommodating cavity that is positioned at two groups of focusing drums of a group lens combination has guaranteed the right alignment between a group lens combination and the two groups of focusing drums.
(4) description of drawings:
Fig. 1 is element explosive view of the present utility model;
Fig. 2 is cut-away view of the present utility model
Fig. 3 is the enlarged drawing at A place among Fig. 2;
Fig. 4 is the enlarged drawing at B place among Fig. 2;
Fig. 5 is the structural representation of body tube of the present utility model;
Fig. 6 is the structural representation of two groups of focusing drums of the present utility model.
(5) embodiment:
Below in conjunction with accompanying drawing the utility model is described in detail:
As shown in Figure 1, the utility model comprises body tube 1 and a group lens combination 2, two groups of lens combination 3 of being located in the body tube 1, described two groups of lens combination 3 are installed in the body tube 1 by two groups of focusing drums 4, circumferentially be evenly distributed with three on two groups of focusing drum 4 sidewalls and transfer core screw 15, having three on body tube 1 sidewall transfers core slot to make way 17 and transfers core screw 15 corresponding, transfer to be equipped with in the core screw 15 and transfer core screw 16, transfer top, core screw 16 bottoms to terminate on two groups of lens combination 3 sidewalls.Described body tube 1 rear end is provided with the standard interface 8 that links to each other with camera interface, and described standard interface 8 is fixed on the body tube 1 by connecting cylinder 9.
Two groups of focusing drums 4 described above comprise the first continuous accommodating cavity 41 and the second accommodating cavity 42, described two groups of lens combination 3 are installed in the second accommodating cavity 42, described a group lens combination 2 tops are fixedly mounted on the body tube 1, the latter half of of a group lens combination 2 extend in the first accommodating cavity 41, and the first accommodating cavity front end is provided with focusing system.Described focusing system comprises the curve cylinder 6 that is mutually permanently connected and the focusing drum 7 that is installed in outside the described body tube 1, described body tube 1 sidewall is provided with three axial straight troughs 18, be provided with accordingly on the curve cylinder 6 and be equipped with on three helical guide channel, 19, the first accommodating cavities, 41 front end side wall that three PIN pin 44 are inserted into helical guide channel 19 and axially in the straight trough 18.When the user needs the adjustable lens focal length, only need to rotate focusing drum 7, band moving curve cylinder 6 rotates, the two side promotion PIN pin 44 of helical guide channel 19 moved when curve cylinder 6 rotated, PIN pin 44 is subjected to the restriction of axial straight trough 18 in circumferential direction, drives two groups of focusing drums 4 and two groups of lens combination 3 front and back rectilinear motions.
A group lens combination 2 rear sides described above are equipped with aperture assembly 22, and described the first accommodating cavity 41 bottom sidewalls are provided with a circumferential groove 43, are provided with accordingly aperture groove 10 with circumferential groove 43 on the body tube 1 middle part sidewall; Body tube 1 outside is provided with aperture adjustment barrel 11, and the aperture driving lever 21 of described aperture assembly 22 is connected with aperture adjustment barrel 11 after passing circumferential groove 43, aperture groove 10.Aperture adjustment barrel 11 is provided with aperture lock-screw 14, and the user stirs aperture lock-screw 14 and drives aperture adjustment barrel 11 rotation adjustable diaphragm sizes.
Two groups of lens combination 3 described above comprise two groups of lens barrels 31 and the some eyeglasses that are located in two groups of lens barrels 31, eyeglass comprises at least a slice core eyeglass 34 to be transferred, circumferentially be evenly distributed with three two groups on described two groups of lens barrel 31 sidewalls and transfer core screw 32, transfer for two groups two groups of accent core screws 33 are installed in the core screw 32, transfer top, core screw 33 bottoms to terminate in core eyeglass 34 lateral margins described to be transferred for two groups, circumferentially be evenly distributed with three two groups on described two groups of focusing drum 4 sidewalls and transfer core resigning hole 45, having three two groups on body tube 1 sidewall transfers 20, two groups of core slots to make way to transfer core slot to make way 20, transfer core resigning hole 45 to transfer core screw 32 corresponding with described two groups for two groups.The eyeglass that the two groups of lens combination are 3 li also can be regulated core shift by similar accent cored structure.
Transfer core resigning hole 45 and transfer core slot to make way 17 to be distributed on the same circumference for described two groups.
Installation of the present utility model and accent core process are as follows:
First described two groups of focusing drums 4 are entered described body tube 1 inside by 44 groups on 3 PIN pin, guarantee that two groups of focusing drums 4 can seesaw by regulating described focusing drum 7; Described a group lens combination 2 is fixedly mounted in body tube 1 inside by 3 screw fasteners, and the assurance aperture can normally be opened, close when being regulated described aperture adjustment barrel 11; To lead a Connection Block 12 and be fixedly mounted in described a group lens combination 2 front ends, then described two groups of lens combination, 3 usefulness two groups lock pressure ring 5 is fixedly mounted in two groups of focusing drums 4, the accent core screw hole 15 in the time of installation on the two groups of focusing drums 4 is mutual corresponding with the accent core screw slot to make way 17 on the body tube 1; Transfer core slot to make way 20, two groups of accent core resigning holes 45 to transfer core screws 32 corresponding with described two groups for two groups.
Then described standard interface 8 is installed in body tube 1 rear end face place, install one in the position of body tube 1, former connecting cylinder 9 and transfer the core tool, with fixed installation standard interface 8, transfer core screw 16 in the accent core screw hole 15 interior installations of described two groups of focusing drums 4 again, install when transferring core screw 16 and can not lock, only guarantee that described accent core screw 16 contacts gently with described two groups of lens combination 3.Can transfer core work according to above-mentioned after installing described part.
CCTV tight shot described in the utility model is installed to above the projector, adjusts back focal length to the position that requires, fine setting focusing drum 7 observation solutions are as situation, until projection clear, slight smear arranged.Observe the projection phenomenon, make the direction of smear consistent with 3 accent core screw hole 15 one of them directions on two groups of focusing drums 4 by rotation standard interface 8, screwdriver is inserted into rotatable described accent core screw 16 by the accent core screw slot to make way 17 on the body tube 1, slow circumvolve is transferred core screw 16, the direction that screws in and the opposite direction of smear, until the motion blur phenomenon that the party is made progress transfers to without motion blur phenomenon, the right hand is rotated screwdriver in order to transfer core when transferring core, left hand is used for finely tuning described focusing drum 7, eyes are observed projected picture: accomplish limit accent core limit observation, when the smear of projection lines transfers to very slight the time, again must be slow during rotary screw, can transfer very accurately like this core to lines without motion blur phenomenon, if the accent core strength of this moment is excessive then the direction of smear can be adjusted to and be offset to other direction.After a direction mixes up, rotate standard interface 8, observe the motion blur phenomenon of the projection lines of other direction, the step above repeating is transferred the core operation.Generally regulating both direction just can be so that the phenomenon of projected picture lines smear be solved (if motion blur phenomenon also appears in the direction of not being transferred to, transferring core to get final product according to same method).After transferring core work to finish described CCTV tight shot is taken off from projector, 3 on described two groups of focusing drums 4 described accent core screws 16 are carried out a glue to be fixed, guarantee that described accent core screw 16 can not become flexible, thereby guarantee that the solution behind the accent core remains unchanged as effect, more stable.Finish transfer core work after, the accent core tool that only need to use when transferring core is changed to regular connecting cylinder 9 and installs and get final product, this operation can not affect the camera lens projection solution determined as effect, operates to be simple and easy to carry out yet, and can not produce scrapping of parts.
Claims (4)
1. the CCTV tight shot of core shift between an adjustable group, comprise body tube and be located in body tube interior a group lens combination, two groups of lens combination, it is characterized in that: described two groups of lens combination are installed in the body tube by two groups of focusing drums, circumferentially be evenly distributed with three on two groups of focusing drum sidewalls and transfer the core screw, having three on the body tube sidewall transfers the core slot to make way and transfers the core screw corresponding, transfer to be equipped with in the core screw and transfer the core screw, transfer top, core screw bottom to terminate on two groups of lens combination sidewalls.
2. the CCTV tight shot of core shift between a kind of adjustable group according to claim 1, it is characterized in that: described two groups of focusing drums comprise the first continuous accommodating cavity and the second accommodating cavity, described two groups of lens combination are installed in the second accommodating cavity, described a group lens combination top is fixedly mounted on the body tube, the latter half of of a group lens combination extend in the first accommodating cavity, and the first accommodating cavity front end is provided with focusing system.
3. the CCTV tight shot of core shift between a kind of adjustable group according to claim 2, it is characterized in that: described focusing system comprises the curve cylinder and the focusing drum that are mutually permanently connected that is installed in outside the described body tube, described body tube sidewall is provided with axial straight trough, the curve cylinder is provided with helical guide channel, and the anterior sidewall of the first accommodating cavity is provided with direction protrusion and is inserted in helical guide channel and the axial straight trough.
4. the CCTV tight shot of core shift between a kind of adjustable group according to claim 2, it is characterized in that: described a group lens combination rear end is equipped with the aperture assembly, the sidewall of described the first accommodating cavity rear end is provided with a circumferential groove, is provided with accordingly the aperture groove with circumferential groove on the sidewall of body tube middle part; The body tube outside is provided with the aperture adjustment barrel, and the aperture driving lever of described aperture assembly is connected with the aperture adjustment barrel after passing circumferential groove, aperture groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220432192.XU CN202815292U (en) | 2012-08-28 | 2012-08-28 | CCTV fixed-focus lens being able to adjust core shift among groups |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220432192.XU CN202815292U (en) | 2012-08-28 | 2012-08-28 | CCTV fixed-focus lens being able to adjust core shift among groups |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202815292U true CN202815292U (en) | 2013-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220432192.XU Expired - Fee Related CN202815292U (en) | 2012-08-28 | 2012-08-28 | CCTV fixed-focus lens being able to adjust core shift among groups |
Country Status (1)
| Country | Link |
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| CN (1) | CN202815292U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307553A (en) * | 2013-06-21 | 2013-09-18 | 嘉善加斯戴克医疗器械有限公司 | Device for accurately adjusting one-dimensional position with hand wheel |
| CN107277334A (en) * | 2017-08-03 | 2017-10-20 | 苏州天准科技股份有限公司 | Device and its adjustment method that a kind of industrial lens are quickly focused with eccentric |
| CN110908065A (en) * | 2019-12-30 | 2020-03-24 | 广州长步道光电科技有限公司 | Can follow optical axis and rotate anti-disengaging's camera lens structure and imaging device |
| CN114815122A (en) * | 2022-04-22 | 2022-07-29 | 歌尔光学科技有限公司 | Projection lens, projection ray apparatus and virtual reality equipment |
-
2012
- 2012-08-28 CN CN201220432192.XU patent/CN202815292U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307553A (en) * | 2013-06-21 | 2013-09-18 | 嘉善加斯戴克医疗器械有限公司 | Device for accurately adjusting one-dimensional position with hand wheel |
| CN107277334A (en) * | 2017-08-03 | 2017-10-20 | 苏州天准科技股份有限公司 | Device and its adjustment method that a kind of industrial lens are quickly focused with eccentric |
| CN110908065A (en) * | 2019-12-30 | 2020-03-24 | 广州长步道光电科技有限公司 | Can follow optical axis and rotate anti-disengaging's camera lens structure and imaging device |
| CN110908065B (en) * | 2019-12-30 | 2023-09-12 | 湖南长步道光学科技有限公司 | Lens structure capable of rotating along optical axis to prevent falling and imaging equipment |
| CN114815122A (en) * | 2022-04-22 | 2022-07-29 | 歌尔光学科技有限公司 | Projection lens, projection ray apparatus and virtual reality equipment |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20170828 |