CN203981960U - A kind of tight shot continuous vari-focus attachment lens - Google Patents
A kind of tight shot continuous vari-focus attachment lens Download PDFInfo
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- CN203981960U CN203981960U CN201420424250.3U CN201420424250U CN203981960U CN 203981960 U CN203981960 U CN 203981960U CN 201420424250 U CN201420424250 U CN 201420424250U CN 203981960 U CN203981960 U CN 203981960U
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- 230000003287 optical effect Effects 0.000 claims abstract description 37
- 230000005499 meniscus Effects 0.000 claims abstract description 26
- 239000011521 glass Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 2
- 238000003384 imaging method Methods 0.000 description 9
- 238000012546 transfer Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Abstract
The utility model discloses a kind of tight shot continuous vari-focus attachment lens, along optical axis, from object space, be provided with successively fixedly group, zoom group, compensation group and rear fixedly group, wherein: front fixedly group comprises a plano-convex lens; Zoom group comprises a biconcave lens and a biconvex lens from thing side along optical axis; Compensation group comprises a meniscus lens and a biconvex lens from thing side along optical axis; Rear fixedly group comprises a meniscus lens; Wherein, front fixedly group and rear fixedly group are fixed on optical axis, and zoom group and compensation group can be slided on optical axis.This scheme is during zooming to from wide-angle state the state of looking in the distance, and the spacing of zoom group and front fixedly group increases, and the spacing of compensation group and zoom group increases, the pitch smaller of compensation group and rear fixedly group.This scheme is simple in structure, with low cost, and can realize tight shot is carried out to continuous vari-focus.
Description
Technical field
The utility model relates to photoelectronic imaging field, and specifically a kind of tight shot continuous vari-focus attachment lens, is particularly suited for the heavy caliber tight shot use of remote monitor imaging.
Background technology
Growing along with photoelectric technology, demand to the zoom lens of the large-aperture long-focus for remote image supervisory control class is more and more many, but such zoom lens is mostly comprised of tens eyeglasses, price is higher, such as, the zoom lens of bore 100mm needs 2-4 ten thousand left and right, and the zoom lens need tens0000 of bore 200mm are even higher.Normal domestic field is mostly difficult to bear.
The tight shot price of large-aperture long-focus is much lower, and such as the tight shot of bore 200mm left and right, required expense is only in 10,000.But tight shot does not have zoom function, its field angle is less, is not easy to find target, very impracticable in remote monitor.
For this reason, in prior art, most of tight shots increase by installing additional the increase that times mirror is realized its focal length multiple, but existing increasing times mirror often can not be realized the continuous vari-focus of tight shot, uses inconvenience very.This technical matters for existing in prior art.
Summary of the invention
For above-mentioned technical matters, the utility model provides the technical scheme of a kind of tight shot continuous vari-focus with attachment lens, and this scheme not only can increase the camera lens multiple of tight shot, can also realize the continuous vari-focus of tight shot, and simple in structure, easy to use, with low cost again.
The utility model is achieved by the following technical solution:
A tight shot continuous vari-focus attachment lens, is provided with front fixedly group, zoom group, compensation group and rear fixedly group from the object side to the image side successively along optical axis, wherein:
Front fixedly group comprises a slice plano-convex lens;
Zoom group comprises a slice biconcave lens and a slice biconvex lens from object side along optical axis;
Compensation group comprises from object side that along optical axis a slice convex surface is towards the meniscus lens with negative refractive power and a slice biconvex lens of thing side;
Rear fixedly group comprises that a slice convex surface is towards the meniscus lens with negative refractive power of thing side;
Wherein, front fixedly group and rear fixedly group are fixed on optical axis, and zoom group and compensation group can be slided on optical axis.
During use, the utility model is co-axially mounted on to the picture side of tight shot, and makes the thing side of front fixedly group towards tight shot.Zoom group, for changing the focal length of tight shot, can make tight shot realize continuous vari-focus.And tight shot imaging is through the amplification of zoom group, and through the imaging compensating of compensation group, thereby the imaging of remote monitor there is further the effect of amplifying and comparatively clear.
Further, during zooming to from wide-angle state the state of looking in the distance, zoom group and compensation group deviate from respectively front fixedly group and do one-way movement.
Further, during zooming to from wide-angle state the state of looking in the distance, the spacing of zoom group and front fixedly group increases, and the spacing of compensation group and zoom group increases, the pitch smaller of compensation group and rear fixedly group.
The meniscus lens of compensation group further, and the Edge Distance of biconvex lens are 0.
The meniscus lens of wherein, compensation group glues together mutually with biconvex lens.
Further, the equal coating anti-reflection film in the surface of each lens.
Further, each lens all adopt spheric glass.
Further, the biconcave lens of zoom group and biconvex lens distribute from object side successively along optical axis.
The meniscus lens of compensation group further, and biconvex lens distribute from object side successively along optical axis.
The beneficial effects of the utility model can obtain by technique scheme:
(1) the utility model choosing and arranging by six-element lens, make the utility model can realize zoom and the continuous vari-focus of tight shot in the situation that adopting less eyeglass, and owing to having reduced the quantity of lens, dwindled lens length, make the lens construction in the utility model compact, imaging effect is good, is easy to adjust and assembling;
(2) the utility model has been realized the continuous vari-focus of tight shot by six-element lens, especially for large-aperture long-focus remote monitor, can solve the contradiction that tight shot visual field is too narrow and large-aperture long-focus zoom lens price is high, both expand monitoring distance, provide cost savings again.
Accompanying drawing explanation
Fig. 1 is the optical system schematic diagram of attachment lens for this tight shot continuous vari-focus;
Fig. 2 be this tight shot continuous vari-focus with attachment lens the optical system schematic diagram in wide-angle state, middle burnt state and while looking in the distance state respectively;
Fig. 3 is the modulation transfer function figure of the utility model when wide-angle state;
Fig. 4 is the modulation transfer function figure of the utility model when middle burnt state;
Fig. 5 is the modulation transfer function figure of the utility model when looking in the distance state.
Wherein: 100 is front fixedly group, and 101 is plano-convex lens, and 200 is zoom group, and 201 is biconcave lens, and 202 is biconvex lens, 300 is compensation group, and 301 is meniscus lens, and 302 is biconvex lens, and 400 is rear fixedly group, and 401 is meniscus lens.
Embodiment
For clearly demonstrating the technical characterstic of this programme, below in conjunction with accompanying drawing, this programme is set forth.
As shown in Figure 1, the utility model provides a kind of tight shot continuous vari-focus attachment lens, along optical axis, is provided with successively from the object side to the image side front fixedly group 100, zoom group 200, compensation group 300 and rear fixedly group 400, wherein:
Front fixing group 100 has a slice plano-convex lens 101;
Zoom group 200 has a slice biconcave lens 201 and a slice biconvex lens 202 from object side along optical axis;
Compensation group 300 has a slice convex surface towards the meniscus lens with negative refractive power 301 and a slice biconvex lens 302 of thing side from object side along optical axis.
Rear fixing group 400 has a slice convex surface towards the meniscus lens with negative refractive power 401 of thing side;
Wherein, front fixedly group 100 and rear fixedly group 400 are fixed on optical axis, and zoom group 200 and compensation group 300 can be slided on optical axis.
Wherein, the biconcave lens 201 of zoom group 200 and biconvex lens 202 distribute from object side successively along optical axis, and the meniscus lens 301 of compensation group 300 and biconvex lens 302 distribute from object side successively along optical axis.During use, light is from object side, successively by plano-convex lens 101, biconcave lens 201, biconvex lens 202, meniscus lens 301, biconvex lens 302 and meniscus lens 401.
In addition, each eyeglass all adopts conventional glass material, and cost is low.
In the present embodiment, front fixedly group 100 and rear fixedly group 400 counterpart sides immobilize, and zoom group 200 and compensation group 300 can move along optical axis.Particularly, plano-convex lens 101 and meniscus lens 401 counterpart sides are changeless, and biconcave lens 201, biconvex lens 202 and meniscus lens 301 and biconvex lens 302 all can move along optical axis.
The slip of zoom group 200 on optical axis, for changing the focal length of tight shot; The slip of compensation group 300 on optical axis, for imaging compensating is provided, thereby when optical system focal length is continuously changed within the specific limits, image planes are stable and can keep good picture element.
In the present embodiment, as shown in Figure 2, during zooming to from wide-angle state the state of looking in the distance, zoom group 200 deviates from respectively front fixedly group 100 with compensation group 300 and does one-way movement, and zoom group 200 increases with the spacing of front fixedly group 100, compensation group 300 increases with the spacing of zoom group 200, the pitch smaller of compensation group 300 and rear fixedly group 400, and then realize tight shot continuous vari-focus.
To sum up, when above-mentioned tight shot continuous vari-focus with the location status of attachment lens from wide-angle state when looking in the distance state variation: fixing group 100 transfixion in zoom process, before fixing group 100 distances to image device focal plane immobilize; Zoom group 200 moves change focal length along optical axis, and the distance between zoom group 200 and front fixedly group 100 increases gradually; Compensation group 300 compensates motion along with moving of zoom group 200, and increases gradually with the distance of front fixedly group 100, to best image planes are fallen within on image device focal plane, meanwhile, the distance between compensation group 300 and zoom group 200 increases gradually; Rear fixing group 400 transfixion in zoom process, the fixing distance of organizing image device focal plane immobilizes afterwards.
Wherein, the biconvex lens 302 of compensation group 300 and the Edge Distance of meniscus lens 301 are 0, together with biconvex lens 302 is glue-bondable with meniscus lens 301 or adopt trim ring to be fixed together, in the present embodiment, biconvex lens 302 and meniscus lens 301 gummeds.
In the present embodiment, each lens all adopt spheric glass, and the material that all lens use is conventional glass material, make the low processing cost of camera lens; And the equal coating anti-reflection film in the surface of each lens, lens transmission efficiency is higher.
Take below and coordinate attachment lens that 2000mmF10 tight shot uses the utility model to be described as example.
2000mmF10 tight shot as side, the utility model is installed coaxially, wherein the thing side surface of front fixedly group 100 of the present utility model and the imaging image planes of 2000mmF10 tight shot are apart from 161mm, specific as follows.
Below in table one: D1 is the spacing of plano-convex lens 101 and biconcave lens 201, and D2 is the spacing of biconvex lens 202 and meniscus lens 301, and D3 is the spacing of biconvex lens 302 and meniscus lens 401.
Table one: optical component parameter table
Table two: the relation of zoom position and lens combination spacing
Below with reference to Aberration Analysis figure, effect of the present utility model is done to further detailed description.
Fig. 3, Fig. 4 and Fig. 5 be tight shot continuous vari-focus described in the utility model with attachment lens the figure of the modulation transfer function (Modulation Transfer Function) in wide-angle state, middle burnt state and while looking in the distance state respectively, wherein transverse axis is the demand pairs (line pair per millimeter) of interior every millimeter of image, and the longitudinal axis is contrast numerical value.
Modulation transfer function figure is the most comprehensive criterion in current all Performance of Optical System judgements, can find out that all focal length section MTF curves all approach diffraction limit in figure.
From figure, we can find, various aberrations have obtained good correction, can obtain the image of higher quality, and imaging effect is good, the utlity model has good optical effect.
To sum up, the utility model is only used six-element lens just to make tight shot realize the function of continuous vari-focus, and can obtain image clearly, has not only reduced the cost of remote monitor, and compact conformation, has greatly reduced the length of camera lens, is convenient to promote the use of.
The above, it is only better embodiment of the present utility model, not in order to limit the utility model, any those skilled in the art, in any simple modification, equivalent variations and the modification that do not depart from the content of technical solutions of the utility model, according to technical spirit of the present utility model, above embodiment done, all belong to the scope of technical solutions of the utility model.
Claims (8)
1. a tight shot continuous vari-focus attachment lens, is characterized in that, along optical axis, is provided with successively from the object side to the image side front fixedly group, zoom group, compensation group and rear fixedly group, wherein:
Front fixedly group comprises a slice plano-convex lens;
Zoom group comprises a slice biconcave lens and a slice biconvex lens from object side along optical axis;
Compensation group comprises from object side that along optical axis a slice convex surface is towards the meniscus lens with negative refractive power and a slice biconvex lens of thing side;
Rear fixedly group comprises that a slice convex surface is towards the meniscus lens with negative refractive power of thing side;
Wherein, front fixedly group and rear fixedly group are fixed on optical axis, and zoom group and compensation group can be slided on optical axis.
2. tight shot continuous vari-focus attachment lens according to claim 1, it is characterized in that, during zooming to from wide-angle state the state of looking in the distance, the spacing of zoom group and front fixedly group increases, the spacing of compensation group and zoom group increases, the pitch smaller of compensation group and rear fixedly group.
3. tight shot continuous vari-focus attachment lens according to claim 1 and 2, is characterized in that, the meniscus lens of compensation group and the Edge Distance of biconvex lens are 0.
4. tight shot continuous vari-focus attachment lens according to claim 1 and 2, is characterized in that, the equal coating anti-reflection film in surface of each lens.
5. tight shot continuous vari-focus attachment lens according to claim 1 and 2, is characterized in that, each lens all adopt spheric glass.
6. tight shot continuous vari-focus attachment lens according to claim 1 and 2, is characterized in that, the biconcave lens of zoom group and biconvex lens distribute from object side successively along optical axis.
7. tight shot continuous vari-focus attachment lens according to claim 6, is characterized in that, the meniscus lens of compensation group and biconvex lens distribute from object side successively along optical axis.
8. tight shot continuous vari-focus attachment lens according to claim 3, is characterized in that, the meniscus lens of compensation group glues together mutually with biconvex lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420424250.3U CN203981960U (en) | 2014-07-30 | 2014-07-30 | A kind of tight shot continuous vari-focus attachment lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420424250.3U CN203981960U (en) | 2014-07-30 | 2014-07-30 | A kind of tight shot continuous vari-focus attachment lens |
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| CN203981960U true CN203981960U (en) | 2014-12-03 |
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| CN201420424250.3U Active CN203981960U (en) | 2014-07-30 | 2014-07-30 | A kind of tight shot continuous vari-focus attachment lens |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436474A (en) * | 2016-05-26 | 2017-12-05 | 信泰光学(深圳)有限公司 | Projection lens |
| CN112872582A (en) * | 2020-12-29 | 2021-06-01 | 武汉华工激光工程有限责任公司 | Continuously adjustable large-size shaping system and method |
-
2014
- 2014-07-30 CN CN201420424250.3U patent/CN203981960U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436474A (en) * | 2016-05-26 | 2017-12-05 | 信泰光学(深圳)有限公司 | Projection lens |
| CN112872582A (en) * | 2020-12-29 | 2021-06-01 | 武汉华工激光工程有限责任公司 | Continuously adjustable large-size shaping system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Auxiliary lens of continuous zooming applied to prime lens Effective date of registration: 20160926 Granted publication date: 20141203 Pledgee: Qilu bank, Limited by Share Ltd, Ji'nan Road, No. seven branch Pledgor: JINAN HOPE-WISH PHOTOELECTRIC TECHNOLOGY CO., LTD. Registration number: 2016370000072 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20170926 Granted publication date: 20141203 Pledgee: Qilu bank, Limited by Share Ltd, Ji'nan Road, No. seven branch Pledgor: JINAN HOPE-WISH PHOTOELECTRIC TECHNOLOGY CO., LTD. Registration number: 2016370000072 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Auxiliary lens of continuous zooming applied to prime lens Effective date of registration: 20171016 Granted publication date: 20141203 Pledgee: Qilu bank, Limited by Share Ltd, Ji'nan Road, No. seven branch Pledgor: JINAN HOPE-WISH PHOTOELECTRIC TECHNOLOGY CO., LTD. Registration number: 2017370000154 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20181119 Granted publication date: 20141203 Pledgee: Qilu bank, Limited by Share Ltd, Ji'nan Road, No. seven branch Pledgor: JINAN HOPE-WISH PHOTOELECTRIC TECHNOLOGY CO., LTD. Registration number: 2017370000154 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Auxiliary lens of continuous zooming applied to prime lens Effective date of registration: 20181122 Granted publication date: 20141203 Pledgee: Qilu bank, Limited by Share Ltd, Ji'nan Road, No. seven branch Pledgor: JINAN HOPE-WISH PHOTOELECTRIC TECHNOLOGY CO., LTD. Registration number: 2018370000203 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20191125 Granted publication date: 20141203 Pledgee: Qilu bank, Limited by Share Ltd, Ji'nan Road, No. seven branch Pledgor: JINAN HOPE-WISH PHOTOELECTRIC TECHNOLOGY CO., LTD. Registration number: 2018370000203 |