CN101308245A - Ultra-high magnification, small volume, rapid magnification-variable optical system - Google Patents
Ultra-high magnification, small volume, rapid magnification-variable optical system Download PDFInfo
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- CN101308245A CN101308245A CNA2008100282765A CN200810028276A CN101308245A CN 101308245 A CN101308245 A CN 101308245A CN A2008100282765 A CNA2008100282765 A CN A2008100282765A CN 200810028276 A CN200810028276 A CN 200810028276A CN 101308245 A CN101308245 A CN 101308245A
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Abstract
The invention discloses an optical system with super-high rate, small volume and fast zooming, which can be used for photosensitive devices such as CMOS photosensitive plates or CCD chips, and comprises a first lens group, a second lens group, a third lens group, a fourth lens group and a fifth lens group sequentially, and a lens screen is arranged at the third lens group. The space between adjacent lens groups is variable; the whole focal length of the first lens group is positive; the whole focal length of the second lens group is negative, and the focal length of the first lens in the second lens group is also negative, the whole focal length of the third lens group is positive, the fourth lens group is also known as a compensation group, and the whole focal length is negative, the fifth lens group is a focusing group, and the rear focal is directly adjusted; and the whole focal length is positive; and the optical system has advantages of super-high rate of lenses, small volume, fast zooming and focusing, high sharpness, clear colors, good color reducibility, non zooming blind spot and clear close-range imaging.
Description
Technical field
The present invention relates to a kind of optical system, relate in particular to and a kind ofly be applied to monitor, the ultra-high magnifications of photographic system, small size, become optical system doubly fast.
Background technology
The such shortcoming of take a picture at present, security protection being used of medium-sized or large-scale zoom lens ubiquity: lens ratio is less; Physical dimension is bigger; Times time of change is long.Have only the minority camera lens now, under the situation of sacrificing others, improve aspect certain,, will do volume very greatly, become doubly chronic such as in order to realize the multiplying power height.Now also do not overcome the camera lens of above whole shortcomings.So the medium-sized or large-scale zoom lens that popular photograph, security protection used on the present market, in high costs, volume is bigger, and becomes doubly chronic.This has significant limitation in the use, can not satisfy the consumer the multiplying power height, be convenient for carrying, be convenient to hidden, needs such as the little change of volume is doubly quick.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides that a kind of cost is low, ultra-high magnifications, small size, become optical system doubly fast.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of ultra-high magnifications, small size, the quick optical system doubly that becomes, be used for sensor devices such as CMOS sensitive film or CCD chip, it is characterized in that comprising being provided with first lens group, second lens group, the 3rd lens group, the 4th lens group and the 5th lens group successively, before the 3rd lens group, be provided with diaphragm; Be variable at interval between first lens group and second lens group wherein, between second lens group and the 3rd lens group is variable at interval, between the 3rd lens group and the 4th lens group is variable at interval, between the 4th lens group and the 5th lens group is variable at interval, between the 5th lens group and the sensitive chip is variable at interval, by changing this five variable airspaces, can reach the purpose of the focal length change that makes camera lens.
Aforesaid a kind of ultra-high magnifications, small size, the quick optical system doubly that becomes, described first lens group, the 3rd lens group position with respect to sensor devices in the zoom process is fixed, and second lens group, the 4th lens group and the 5th lens group position with respect to sensor devices in times process of change changes.
Aforesaid a kind of ultra-high magnifications, small size, the quick optical system doubly that becomes, the described first lens group whole focal length is for just, the whole focal length of second lens group is for negative, and first focal length of lens of second lens group is also for negative, whole group makes the focal length of total system change in moving process, reaches to become purpose doubly; The whole focal length of the 3rd lens group is for just; The whole focal length of the 4th lens group in times process of change, by moving this lens group, is that the mobile of second lens group compensates for negative; The 5th lens group is the focusing group.
Aforesaid a kind of ultra-high magnifications, small size, the quick optical system doubly that becomes, the system element characteristic of described first lens group, second lens group, the 3rd lens group, the 4th lens group, the 5th lens group satisfies following formula: f1＞-f2.Wherein, f1 is the combined focal length of first lens group, and f2 is the combined focal length of second lens group.
Aforesaid a kind of ultra-high magnifications, small size, the quick optical system doubly that becomes also can be established the LPF optical filter between optical system and chip.
The invention has the beneficial effects as follows: 1 zoom lens of the present invention can be realized from the low power to the high power and superelevation becomes all size doubly, is particularly useful for the superelevation zooming system; 2, camera lens volume of the present invention is little; 3, camera lens of the present invention become doubly and focusing speed fast; 4, zoom lens sharpness height of the present invention, color are clearly demarcated, and color reducibility is good; 5, zoom lens of the present invention does not have the zoom blind spot, all can become sharply defined image in whole zoom process; 6, closely imaging is clear for zoom lens of the present invention, can also become sharply defined image when the 10mm low coverage; 7, the design has realized 36 Zoom Lens (ZOOM), and adopt AF (focusing automatically) technology, has realized that like this an optical system can be to the photo of the object shooting clear of different distance.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a cross-sectional schematic of the present invention;
Fig. 2 is the synoptic diagram of first lens group;
Fig. 3 is the synoptic diagram of second lens group;
Fig. 4 is the synoptic diagram of the 3rd lens group;
Fig. 5 is the synoptic diagram of the 4th lens group;
Fig. 6 is the synoptic diagram of the 5th lens group;
Embodiment
Referring to figs. 1 through Fig. 6, a kind of ultra-high magnifications, small size, the quick optical system doubly that becomes, can be used for sensor devices such as relatively cheap high pixel CMOS sensitive film or CCD chip, comprise being provided with first lens group 1, second lens group 2, the 3rd lens group 3, the 4th lens group 4 and the 5th lens group 5 successively, before diaphragm 6 is located at the 3rd lens group 3.Be variable at interval between first lens group 1 and second lens group 2 wherein, between second lens group 2 and the 3rd lens group 3 is variable at interval, between the 3rd lens group 3 and the 4th lens group 4 is variable at interval, between the 4th lens group 4 and the 5th lens group 5 is variable at interval, between the 5th lens group 5 and the chip is variable at interval, by changing this five variable airspaces, can reach the purpose of the focal length change that makes camera lens.
The multiplying power height of optical system of the present invention is mainly realized by following four kinds of methods: 1, regulate the ratio between f1, f2, f3, f4, the f5, the numerical values recited of adjustment f1; 2, use aspheric surface; 3, increase and decrease each lens group lens number; 4, the number of increase and decrease lens group; 5 Zoom lens volumes.Can design from little multiplying power to big multiplying power to the zoom lens of the various different multiplying of super large multiplying power, different size by above five kinds of measures.Above-mentioned f1, f2, f3, f4, f5 are respectively the combined focal length of first lens group 1, second lens group 2, the 3rd lens group 3, the 4th lens group 4 and the 5th lens group 5.
Aforesaid a kind of ultra-high magnifications, small size, the quick optical system doubly that becomes, volume is little main to be realized by following three kinds of methods: 1 diaphragm is located at the 3rd group, total system centre (before the direction that light enters is, the position of sensitive chip is the back) part, so both be beneficial to very much the bore that dwindles first lens group, be beneficial to very much the bore of control the 4th lens group, the 5th lens group again; A plurality of hordes move simultaneously when 2, becoming times, so, move less distance and just can change than multiplying power greatly, reduced the length overall of optical system.3 the 3rd lens groups are fixed with respect to sensor devices (image planes) such as CMOS sensitive film or ccd chips in times process of change, so the stop position also is fixed, only need the adjustment aperture size, simplified Machine Design greatly like this, improved precision and reliability simultaneously; In the present invention design very reasonable contemplation arrived diaphragm (perforate of the shutter) aberration that the position produced, thereby not only reasonable distribution aberration but also make this shutter design can realize mass production.
Aforesaid a kind of ultra-high magnifications, small size, the quick optical system doubly that becomes, it becomes doubly quick and mainly realizes by following two kinds of approach: 1, the 4th lens group whole focal length converges to image planes to the light through four groups in front into just.It is the compensation group, is again the focusing group.In times process of change, become when doubly the group moves, this group moves simultaneously, when a change times group moves to the precalculated position, this group also moves to position pre-set, that make image planes clear substantially (it is the most clear also may to arrive), by focusing fine setting automatically, makes image planes the most clear then.Be equivalent to save the focusing step, reached the purpose of the time that shortens.2, the clear aperture of two hordes is all less, become doubly and in the focusing process displacement all shorter, will spend the less time during change times like this.
Aforesaid a kind of ultra-high magnifications, small size, become optical system doubly fast, adopt wide spectrum during design, and the theoretical solution image force of design suitably is higher than theoretical desired value, guaranteed image sharpness and color reducibility.
It is burnt that the 4th lens group is directly regulated the back, thus can directly be transferred to best image planes position, and adopt the high motor of stepping accuracy, this is with regard to the thorough closely problem of the not cleer and peaceful focusing blind spot of imaging of conventional lenses that solved; Product precision and product reliability have also just been improved so simultaneously.
For realizing best image planes effect, the rear portion of optical system also can add LPF, to filter out interference fringe.
Lift the actual design case of one 36 times of zooms below
Serial number type radius (thickness) optical material diameter
1 standard, 61.51 1.5 ZF7 φ 30
2 standards, 28.56 5.45 Lak3 φ 30
3 standards-40.32,6.25 Air φ 28
4 standards, 50.56 3.5 Lak3 φ 25
5 standards, 152.348 1.05 Air φ 25
6 standards, 78.56 1.5 LaF4 φ 16
7 standards, 12.48 4.05 Air φ 16
8 standards, 26.36 1.0 LaF2 φ 12
9 standards, 6.06 2.05 Air φ 12
10 standards, 100.536 0.65 K9 φ 12
11 standards, 10.356 1.9 zf7 φ 10
12 standards, 20.32 23.52 Air φ 10
The accurate infinitely great 1.05 Air φ 12 of light field mark
13 standards, 35.31 2.5 Laf7 φ 12
14 standards-52.693 1.0 Air φ 12
15 standards, 23.45 2.56 K9 φ 12
16 standards, 23.45 0.52 Air φ 12
17 standards, 15.38 1.15 zf7 φ 11
18 standards, 75.60 1.5 Air φ 11
19 standards-23.45,0.86 ZK9 φ 10
20 standards, 205.32 0.8 Air φ 10
21 standards, 805.48 0.75 zf7 φ 10
22 standards, 15.45 1.5 Air φ 10
23 standards, 42.56 3.5 zK7 φ 12
24 standards-10.98,1.5 zf7 φ 12
25 standards-43.65,0.1 Air φ 12
26 standards, 13.65 2.5 Lak4 φ, 12 φ
27 standards-53.86,2.5 Air φ, 12 φ
The image planes infinity
Group's focusing moving range:
1,2 group is 1mm～20.5mm at interval
2,3 groups are 1mm～20.5mm at interval
3,4 groups are 1.3mm～8.3mm at interval
4,5 groups are 1.5mm～13.6mm at interval
5 groups and image planes are 8.1mm～18.4mm at interval.
Claims (3)
- A ultra-high magnifications, small size, become optical system doubly fast, be used for sensor devices such as CMOS sensitive film or CCD chip, it is characterized in that comprising being provided with first lens group, second lens group, the 3rd lens group, the 4th lens group and the 5th lens group successively, before the 3rd lens group, be provided with diaphragm; Be variable at interval between first lens group and second lens group wherein, between second lens group and the 3rd lens group is variable at interval, between the 3rd lens group and the 4th lens group is variable at interval, between the 4th lens group and the 5th lens group is variable at interval, between the 5th lens group and the sensitive chip is variable at interval, by changing this five variable airspaces, can reach the purpose of the focal length change that makes camera lens.
- 2. a kind of ultra-high magnifications according to claim 1, small size, the quick optical system doubly that becomes, it is characterized in that described first lens group, the 3rd lens group position with respect to sensor devices in the zoom process fixes, second lens group, the 4th lens group and the 5th lens group position with respect to sensor devices in times process of change changes.
- 3. a kind of ultra-high magnifications according to claim 1, small size, the quick optical system doubly that becomes, it is characterized in that the described first lens group whole focal length is for just, the whole focal length of second lens group is for negative, and first focal length of lens of second lens group is also for negative, whole group makes the focal length of total system change in moving process, reaches to become purpose doubly; The whole focal length of the 3rd lens group is for just; The whole focal length of the 4th lens group in times process of change, by moving this lens group, is that the mobile of second lens group compensates for negative; The 5th lens group is focusing group, and whole focal length is for just.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100282765A CN101308245A (en) | 2008-05-27 | 2008-05-27 | Ultra-high magnification, small volume, rapid magnification-variable optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100282765A CN101308245A (en) | 2008-05-27 | 2008-05-27 | Ultra-high magnification, small volume, rapid magnification-variable optical system |
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| Publication Number | Publication Date |
|---|---|
| CN101308245A true CN101308245A (en) | 2008-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100282765A Pending CN101308245A (en) | 2008-05-27 | 2008-05-27 | Ultra-high magnification, small volume, rapid magnification-variable optical system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116577919A (en) * | 2023-07-06 | 2023-08-11 | 苏州东方克洛托光电技术有限公司 | Zoom lens with racemization prism |
-
2008
- 2008-05-27 CN CNA2008100282765A patent/CN101308245A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116577919A (en) * | 2023-07-06 | 2023-08-11 | 苏州东方克洛托光电技术有限公司 | Zoom lens with racemization prism |
| CN116577919B (en) * | 2023-07-06 | 2023-09-26 | 苏州东方克洛托光电技术有限公司 | Zoom lens with racemization prism |
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Open date: 20081119 |