CN100347581C - Super-far shooting zoom optical system - Google Patents
Super-far shooting zoom optical system Download PDFInfo
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- CN100347581C CN100347581C CNB031600557A CN03160055A CN100347581C CN 100347581 C CN100347581 C CN 100347581C CN B031600557 A CNB031600557 A CN B031600557A CN 03160055 A CN03160055 A CN 03160055A CN 100347581 C CN100347581 C CN 100347581C
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- 230000003287 optical effect Effects 0.000 title claims abstract description 47
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- 230000005499 meniscus Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 241000219739 Lens Species 0.000 description 72
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- 230000000694 effects Effects 0.000 description 3
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- 230000004323 axial length Effects 0.000 description 1
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Abstract
The present invention discloses a super-far shooting zoom optical system which has very long focal length, but the total length of the system is very small. The super-far shooting zoom optical system is composed of a front fixing group, a field lens, a zoom group and a compensation group, wherein all of the lens groups have positive focal power. The front fixing group comprises a first lens with positive focal power, a second lens with positive focal power and a third lens with negative focal power. The zoom group comprises a fifth lens with positive focal power, a sixth lens with negative focal power and a seventh lens with positive focal power. The compensation group comprises an eighth lens with positive focal power, a ninth lens with negative focal power and a tenth lens with positive focal power. The regular movement of the zoom group and the compensation group makes the focal length of the system continuously change. The super-far shooting continuous zoom optical system is the core part of a TV camera lens for remotely monitoring and is also used as an objective lens of a continuous zoom telescope.
Description
Technical field
The present invention relates to a kind of optical system, provide a kind of super telephoto zoom especially apart from optical system.
Background technology
The telephotography technology and equipment to be applied in current society quite general, it can watch a certain scene simultaneously for numerous people, and can easily the situation of scene be noted.In the telephotography technology, relate to the problem that needs observation and monitoring distance target far away through regular meeting; for example environmental protection department need know whether circumference has discharging flue dust in position in several kilometers, and the product delivery line safety etc. whether in several kilometers need be known by exploitation of oil-gas field enterprise.Every similar this remote TV observation all needs to use the television cameras of long-focus.
Generally speaking, the focal length numerical value of long focal length lens and the length of camera lens are much the same, and optical designers has been invented long shot for the volume that reduces camera lens as far as possible.Dolly-out,ing dolly-back of long focal length lens is defined as than te:
So-called long shot is exactly that the axial length dimension of camera lens is littler than the focal length numerical value of camera lens, both te＜1.It is exactly good that te value that it is generally acknowledged refractive optical system can arrive 0.85.But 5 years nearest technology have had very again, and much progress constantly refreshes this record, in order to be different from forefathers' achievement, generally is referred to as super long shot dolly-out,ing dolly-back than the camera lens that reaches 0.7 in the industry.Accomplish that for refractive and reflective optical system te≤0.7 is not the part difficult matter, but the radial dimension of catadioptric formula optical lens is very big, such weak point and thick camera lens seems very heavy.People's universal demand is small and exquisite, flexible, portable product in the remote monitoring activity, conveniently moves to satisfy in the actual use, the needs of system assembles and light use.
Even big dolly-out,ing dolly-back than also being difficult to attract much attention again in current society arranged for focusing apart from optical system, people are just interesting to great-hearted implements now, design have big dolly-out, dolly-back than with powerful variable focal length optical system be the researcher of precision equipment and the target that the fabricator pursues always.
All than focusing the difficulty apart from system, the axial dimension of general zoom system is more bigger than the maximal value of system focal length in design and manufacturing for variable focal length optical system.For example the focal length of camera lens is that 100-1000mm has 10 times varifocal scope, and such optical system length overall will surpass 1000mm.If the total length of optical system just deserves to be called super telephoto zoom apart from optical system less than 700mm.Only less than 500mm, such system then is very popular to people if the length of system is littler.
Summary of the invention
The objective of the invention is to overcome the problems of the prior art and deficiency apart from optical system, keep good aberration characteristic simultaneously having good optical property by a kind of super telephoto zoom.
To achieve these goals, the technical solution used in the present invention is:
A kind of super telephoto zoom is apart from optical system, and this super telephoto zoom is doubly organized by preceding fixedly group, field lens, change and the compensation group constitutes apart from optical system, in the zoom process, between each mirror group along wheelbase from being variable, wherein:
Should preceding fixing group comprise first lens with positive light coke, the 3rd lens that have second lens of positive light coke and have negative power, these first lens are low chromatic dispersion biconvex lens, these second lens are low chromatic dispersion positive meniscus lens, this second lens convex surface is near first lens, the 3rd lens are high chromatic dispersion plano-concave shape lens, and its plane is near second lens;
Be provided with lens in preceding fixedly group focus front, optical designers is called field lens being arranged near the lens of a certain mirror group focus, and this field lens is a planoconvex, and the rearward-facing change of its convex surface is doubly organized.
This change doubly group comprises the 5th lens, the 6th lens with negative power with positive light coke, the 7th lens with positive light coke, the 5th lens are the biconvex lens of low chromatic dispersion, the 6th lens are the biconcave lens of high chromatic dispersion, the 7th lens are the plano-convex lens of low chromatic dispersion, and its plane is near the 6th lens;
This compensation group comprises the 8th lens, the 9th lens with negative power with positive light coke, the tenth lens with positive light coke, the 8th lens are the plano-convex lens of low chromatic dispersion, its convex surface is near the 7th lens, the 9th lens are the biconcave lens of high chromatic dispersion, and the tenth lens are the biconvex lens of low chromatic dispersion.
The longest focal length value fmax of general bigger and system of the focal length of preceding fixedly group being got when design of Optical System is approaching, both fa ≈ fmax.Become in nearly all variable focal length optical system that doubly to organize b all be the negative power group.Compensation group c can be designed to the negative power group and be called compensation for negative group, also have and the compensation group is designed to being called of positive light coke just organizes compensation, just organizing the version of compensation more complicated but that the external form of camera lens can be done is thinner, just organizing compensation or compensation for negative group no matter be, system's focal length by short focal length in the process that long-focus changes, becoming a times group is that preceding dorsad fixing group is mobile, is called traditionally backward and moves.
The research that this mirror set of dispense form has been passed through numerous scientific workers is considered to very ripe method for designing at present.By discovering for telephoto zoom of the inventor, become doubly group and compensation group and all adopt compacter that the positive light coke group system can design apart from optical system.The value of the focal distance f a of current fixedly group a is when doubly fmax of 0.17-0.35, and can there be smaller length and very just can be not good aberration correction under the complicated situation in version in system.Become doubly the focal power of group and compensation group all get on the occasion of, their focal length is got 0.2-0.42 fmin doubly, it is favourable to aberration correction again so promptly can to obtain big zoom ratio.The condition that each light group of the present invention will satisfy is:
Wherein: | 0.17fmax|≤fa≤| 0.35fmax|
|0.2·fmin|≤fb≤|0.42·fmin|
|0.2·fmin|≤fc≤|0.42·fmin|
Here, fa: the focal length of preceding fixedly group;
Fb: become the doubly focal length of group;
Fc: the focal length of compensation group.
Can find that the optical image of one of best result system is upright finding the solution and arranging in the light path, this is because become doubly group and compensation group play the effect of real image convergent-divergent to preceding fixedly group result.Though at this moment system is a real image but owing to be upright, focal length by optical design habitual definition system is born, the usually said lens negative power of system's negative power here and people is not the same thing, in expression formula to system's focal length absolute value sign.Simultaneously shown that also focal distance f a, fb, the fc of 3 mirror groups of the present invention are positive.
Below in conjunction with the drawings and specific embodiments the present invention is further described.
Description of drawings
Fig. 1 is an optical system example schematic of the present invention;
The synoptic diagram that Fig. 2 moves for general zoomlens group;
Fig. 3 moves synoptic diagram for zoom system mirror group of the present invention;
Fig. 4 is the optical system diagram of afocal zoom telescope.
Embodiment
According to the design rule that the present invention studied, can design a series of super telephoto zoom apart from optical system.Below data be 10 times of super telephoto zoom that are applied to television camera apart from optical system, system can be carried out suitable convergent-divergent according to video camera as the different-format of receiving device.Below the focal length that provides of table 1 be 100-1000mm, be applicable to 1/3 " television camera.Fig. 1 is the optical system diagram of table 1 data.
| The optical system structure parameter list of table 1, concrete embodiment | ||||
| Focal distance f=100-1000mm; Field angle 2 ω=4 °-0.4 °; Relative aperture D/f=1: 2.8-1: 20 system's length overalls (first to image planes) ∑ d=363.9 | ||||
| Sequence number | Radius of curvature R | Thickness or interval d | Refractive index n d | Chromatic dispersion Abbe number υ |
| 1 | 158.0583 | |||
| -466.5 | 5.4 | 1.5163 | 64.1 | |
| 2 | 122.73 | 0.25 | ||
| 334.083 | 4.2 | 1.5163 | 64.1 | |
| 3 | ∞ | 1.1 | ||
| 236.5 | 3.75 | 1.755 | 27.5 | |
| 4 | Diaphragm | 160.8 | ||
| 5 | ∞ | 74.2 | ||
| -20.83 | 5.0 | 1.5163 | 64.1 | |
| 6 | 15.482 | Dab is variable | ||
| -43.53 | 3.3 | 1.613 | 60.6 | |
| 7 | -12.55 | 2.0 | ||
| 20.433 | 1.25 | 1.6128 | 36.9 | |
| 8 | ∞ | 1.8 | ||
| -12.14 | 3.3 | 1.613 | 60.6 | |
| 9 | 12.14 | Dbc is variable | ||
| ∞ | 3.3 | 1.613 | 60.6 | |
| 10 | -20.433 | 1.8 | ||
| 12.55 | 1.25 | 1.6128 | 36.9 | |
| 11 | 43.53 | 2.0 | ||
| -15.482 | 3.3 | 1.613 | 60.6 | |
| 12 | Image planes | Dcd is variable |
Variable interval Dab, Dbc, Dcd can be tried to achieve by following formula:
Dab＝(1-278.0451/f)·1009.328/Δ+21.00137；
Dbc＝Δ+53.85269；
Dcd＝85.91-Dab-Dbc。
Need provide the numerical example of some main variable interval according to optical system patent custom, table 2 is 5 pairing numerical examples of focal length value.
| Table 2, variable interval numerical example table | |||
| Focal distance f | Variable interval Dab | Variable interval Dbc | Variable interval Dcd |
| 100 | 63.72735 | 11.79257 | 10.39 |
| 300 | 16.10547 | 38.7654 | 31.104 |
| 500 | 4.791464 | 26.21212 | 54.906 |
| 800 | 5.78237 | 10.58242 | 69.545 |
| 1000 | 6.842417 | 2.387731 | 76.68 |
Before fixing group be that 3 simple lenses of 1,2,3 are formed by sequence number, first lens 1 are biconvex lens; Second lens 2 are that meniscus is commonly referred to as positive meniscus lens, and concave surface is towards aperture diaphragm; The 3rd lens 3 are negative lenses of platycelous, and its concave surface also is towards aperture diaphragm; The material of first lens 1 and second lens 2 is low chromatic dispersion, and the 3rd lens 3 are high chromatic dispersion material.Such version was not only simple but also the ability of aberration correction is arranged, and the focal length of preceding fixedly group a is 248.73mm.Back in preceding fixedly group is provided with aperture diaphragm, and its sequence number is 4 in Fig. 1 and table 1, and it is to be used for controlling the system of entering and to arrive the mechanism of image planes luminous energy.
The rear focus front of preceding fixing group a is provided with convexo-plane lens, its sequence number is 5 in Fig. 1 and table 1, and these lens are known as field lens, and its effect is that light beam is assembled, it is smaller to make change doubly organize the overall size of lens like this, simultaneously also easier aberration correction just.
The change of the designed example of the present invention is doubly organized and the compensation group is the mirror-image structure of identical data, sequence number 11 among Fig. 1 and the table 1 is mirror images of sequence number 6, sequence number 10 is mirror images of sequence number 7, and sequence number 9 is mirror images of sequence number 8, and this mirror-image structure optically is called the design of complete symmetry roped party.Sequence number 6,7,8 is formed doubly group of change, 9,10,11 form the compensation group, their group focal length is 31.77mm, they are made of 3 simple lenses respectively, the centre is the biconcave lens of high chromatic dispersion, its both sides are respectively the biconvex lens and the plano-convex lenss of low chromatic dispersion, and the larger radius of curvature face of biconvex lens and the plane of plano-convex lens be two faces of close biconcave lens respectively.The inventor's this version that studies show that is the most succinct in super telephoto zoom in system, also is the minimum selection of manufacturing cost simultaneously.
This super telephoto zoom is doubly organized and the sports rule of compensation group is different with general zoom system mirror group apart from the change of optical system, and Fig. 2 is the synoptic diagram that general zoomlens group moves, and Fig. 3 is that mirror group of the present invention moves synoptic diagram.General zoom system becomes doubly at focal length in by short elongated process that group is backward, before both having deviated from fixedly prescription to mobile; And the present invention is to moving forward towards preceding fixedly prescription.The designed lens movement curve of the present invention is two nonlinear curves, wherein all has linearity range, this design can make the motion of lens reach best smoothness and best moment of torsion separately.
R in the table 1 and the Dab in d and the table 2, Dbc, Dcd numerical value respectively be multiply by a fixed number M respectively just can produce an optical system that is similar to instance data, as get M=0.5 and be exactly one and be applicable to 1/6 that " optical system of video camera; focal distance f=50-500, system's length overall are that 181.9 field angle and relative aperture are constant.In like manner if M=1.3 then the focal length of system be 130-1300, optical system is applicable to 1/2, and " video camera of form, field angle remain 4 °-0.4 °, and relative aperture still is 1: 2.8-1: 20 is constant.
The designed super telephoto zoom of this example is an erecting system apart from optical system, and connecing an eyepiece in the back of this optical system just can become afocal zoom telescope, and such telescope does not need to add and turns to prism, and what version will be succinct is many.For example the super telephoto zoom at this example connects 10 times of eyepieces apart from the optical system back, has just become 4-40 afocal zoom telescope doubly.Fig. 4 is the optical system diagram of afocal zoom telescope, and emergent pupil A is the position of telescope user eye pupil.
In sum, the present invention from application target, on the usefulness, viewpoint such as progressive and novelty sets forth, the practical improvement that it has, accord with function enhancement and practical important document that novel Patent Law is emphasized, shown in the implementation and accompanying drawing that the present invention is above, be one of preferred embodiment of the present invention, be not to limit to the present invention with this, be with, approximate with structure of the present invention, device, feature etc. such as, identical person all should belong to of the present invention founding within purpose and the claim.
Claims (2)
1, a kind of super telephoto zoom is apart from optical system, should super telephoto zoom doubly organize by preceding fixedly group, field lens, change and the compensation group constitutes apart from optical system, in the zoom process, should before fixing group, become doubly that the distance between the group and compensation group is variable, it is characterized in that: fixing group before this, become doubly that group and compensation group are positive light coke; Wherein,
Should preceding fixing group comprise first lens with positive light coke, the 3rd lens that have second lens of positive light coke and have negative power, these first lens are low chromatic dispersion biconvex lens, these second lens are low chromatic dispersion positive meniscus lens, this second lens convex surface is near first lens, the 3rd lens are high chromatic dispersion plano-concave shape lens, and its plane is near second lens;
This change doubly group comprises the 5th lens, the 6th lens with negative power with positive light coke, the 7th lens with positive light coke, the 5th lens are the biconvex lens of low chromatic dispersion, the 6th lens are the biconcave lens of high chromatic dispersion, the 7th lens are the plano-convex lens of low chromatic dispersion, and its plane is near the 6th lens;
This compensation group comprises the 8th lens, the 9th lens with negative power with positive light coke, the tenth lens with positive light coke, the 8th lens are the plano-convex lens of low chromatic dispersion, its convex surface is near the 7th lens, the 9th lens are the biconcave lens of high chromatic dispersion, and the tenth lens are the biconvex lens of low chromatic dispersion.
2, super telephoto zoom as claimed in claim 1 is characterized in that apart from optical system:
Fixing group, change times group and compensation group satisfy following condition before wherein being somebody's turn to do:
|0.17·fmax|≤fa≤|0.35·fmax|
|0.2·fmin|≤fb≤|0.42·fmin|
|0.2·fmin|≤fc≤|0.42·fmin|
Here, fa: the focal length value of preceding fixedly group; Fb: become the doubly focal length value of group;
Fc: the focal length value of compensation group;
Fmin: super telephoto zoom is apart from the minimum focus value of optical system;
Fmax: super telephoto zoom is apart from the maximum focus value of optical system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031600557A CN100347581C (en) | 2003-09-26 | 2003-09-26 | Super-far shooting zoom optical system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031600557A CN100347581C (en) | 2003-09-26 | 2003-09-26 | Super-far shooting zoom optical system |
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| Publication Number | Publication Date |
|---|---|
| CN1601318A CN1601318A (en) | 2005-03-30 |
| CN100347581C true CN100347581C (en) | 2007-11-07 |
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| CNB031600557A Expired - Fee Related CN100347581C (en) | 2003-09-26 | 2003-09-26 | Super-far shooting zoom optical system |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100410715C (en) * | 2005-03-31 | 2008-08-13 | 财团法人工业技术研究院 | Zooming lens |
| CN102778739B (en) * | 2012-07-09 | 2014-05-21 | 秦皇岛视听机械研究所 | Zoom projection fish-eye lens generally used for digital projector |
| WO2016015197A1 (en) * | 2014-07-28 | 2016-02-04 | 深圳市大族激光科技股份有限公司 | Photographic objective lens and photographic equipment |
| JP6587590B2 (en) * | 2016-08-30 | 2019-10-09 | 富士フイルム株式会社 | Zoom lens, projection display device, and imaging device |
| JP6587591B2 (en) * | 2016-08-30 | 2019-10-09 | 富士フイルム株式会社 | Zoom lens, projection display device, and imaging device |
| CN110441234B (en) * | 2019-08-08 | 2020-07-10 | 上海御微半导体技术有限公司 | Zoom lens, defect detection device and defect detection method |
| CN112394485B (en) * | 2020-12-01 | 2022-08-05 | 福建福光股份有限公司 | Long-focus large-caliber astronomical telescope optical system |
| CN113534424A (en) * | 2021-07-15 | 2021-10-22 | 舜宇光学(中山)有限公司 | Zoom lens |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5640277A (en) * | 1993-12-28 | 1997-06-17 | Nikon Corporation | Large aperture medium telephoto lens system |
| US5831771A (en) * | 1995-01-05 | 1998-11-03 | Nikon Corporation | Zoom lens |
| US5966246A (en) * | 1996-08-19 | 1999-10-12 | Fuji Photo Optical Co., Ltd. | Zoom lens of the inner focusing type |
-
2003
- 2003-09-26 CN CNB031600557A patent/CN100347581C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5640277A (en) * | 1993-12-28 | 1997-06-17 | Nikon Corporation | Large aperture medium telephoto lens system |
| US5831771A (en) * | 1995-01-05 | 1998-11-03 | Nikon Corporation | Zoom lens |
| US5966246A (en) * | 1996-08-19 | 1999-10-12 | Fuji Photo Optical Co., Ltd. | Zoom lens of the inner focusing type |
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| CN1601318A (en) | 2005-03-30 |
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Effective date of registration: 20081212 Address after: No.1, South Road, capital gymnasium, Beijing, Haidian District: 100044 Co-patentee after: Beijing Vimicro Co., Ltd. Patentee after: The first Research Institute of the Ministry of public security Address before: No.1, South Road, capital gymnasium, Beijing, Haidian District: 100044 Patentee before: The First Research Institute of Ministry of Public Security |
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Granted publication date: 20071107 Termination date: 20110926 |