CN205539683U - Zoom of rapid convergence - Google Patents
Zoom of rapid convergence Download PDFInfo
- Publication number
- CN205539683U CN205539683U CN201620218321.3U CN201620218321U CN205539683U CN 205539683 U CN205539683 U CN 205539683U CN 201620218321 U CN201620218321 U CN 201620218321U CN 205539683 U CN205539683 U CN 205539683U
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- lens
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- concavees
- convex
- zoom
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Abstract
The utility model provides a zoom of rapid convergence follows the optical axis orientation, holds to the formation of image from the object plane end to include negative optical power's first battery of lens G1, positive refractive power's second battery of lens G2, negative optical power's third battery of lens G3, positive refractive power's fourth battery of lens G4 and image plane IP in proper order, first battery of lens G1 includes first concavees lens, second concavees lens and third convex lens in proper order, second battery of lens G2 includes a meniscus, second convex lens, third concavees lens, third convex lens, fourth convex lens, fourth concavees lens, the 5th convex lens and the 5th concavees lens in proper order, third battery of lens G3 includes the 6th concavees lens, fourth battery of lens G4 is the 2nd meniscus, be equipped with aperture stop SP between a meniscus and the second convex lens. This zoom has reduced whole battery of lens, not only light but also ability rapid convergence greatly.
Description
Technical field
This utility model belongs to camera lens field, especially relates to the zoom lens of a kind of quick focusing.
Background technology
Zoom lens, in the case of not changing shooting distance, can convert focal length by variation focal length, and then obtain different wide
The narrow angle of visual field, changes coverage.Along with growth in the living standard, people's normalization demand to shooting and travel is the most gradually
Increase.But, it is on the high side to there is whole battery of lens in current existing zoom lens, heavier-weight, the problem that focal time is longer, pole
Big hinders its promotion and application.
Utility model content
For Shortcomings in prior art, this utility model provides the zoom lens of a kind of quick focusing, compared to other
Camera lens, this zoom lens is greatly reduced whole battery of lens, the lightest but also can quickly focus on.
This utility model realizes above-mentioned technical purpose by techniques below means.
The zoom lens of a kind of quick focusing, along optical axis direction, includes the first saturating of negative power successively from object plane end to imaging end
Mirror group G1, the second battery of lens G2 of positive light coke, the 3rd battery of lens G3 of negative power, the 4th battery of lens of positive light coke
G4 and image plane IP；Described first battery of lens G1 includes the first concavees lens, the second concavees lens and the 3rd convex lens successively；Described
Second battery of lens G2 includes the first meniscus lens, the second convex lens, the 3rd concavees lens, the 3rd convex lens, the 4th convex successively
Lens, the 4th concavees lens, the 5th convex lens and the 5th concavees lens；Described 3rd battery of lens G3 includes the 6th concavees lens；4th
Battery of lens G4 is the second meniscus lens；It is provided with aperture diaphragm SP between described first meniscus lens and the second convex lens.
Further, described 3rd battery of lens G3, between the 4th battery of lens G4 and this zoom lens three's effective focal length meet such as
Lower relational expression:
1.8<|fimg/ff|<10.0；5.0<|fimg/fw|<40.0
Wherein, fimgIt is the effective focal length of the 4th battery of lens G4, ffIt is the effective focal length of the 3rd battery of lens G3, fwIt it is whole change
Zoom lens is in the effective focal length of wide-angle side.
Further, described first battery of lens G1, the second battery of lens G2, the 3rd battery of lens G3 and the 4th battery of lens G4 saturating
Mirror is spherical lens.
The beneficial effects of the utility model:
The zoom lens of quick focusing described in the utility model, arrange the first battery of lens G1 of negative power, the of positive light coke
Two battery of lens G2, the 3rd battery of lens G3 of negative power, the 4th battery of lens G4 and image plane IP of positive light coke, contract significantly
Subtract whole battery of lens, weight saving, the lightest carry；And it is capable of the purpose quickly focused on.
Accompanying drawing explanation
Fig. 1 is the Zoom lens structure schematic diagram of the present invention.
Fig. 2 is the structural representation that the zoom lens of the present invention is in wide-angle side.
Fig. 3 is the structural representation that the zoom lens of the present invention is in an intermediate position.
Fig. 4 is that the zoom lens of the present invention is in the structural representation taking the photograph far-end.
Fig. 5 is the ray aberration figure that the zoom lens of the present invention is in wide-angle side.
Fig. 6 is the ray aberration figure that the zoom lens of the present invention is in an intermediate position.
Fig. 7 is that the zoom lens of the present invention is in the ray aberration figure taking the photograph far-end.
Fig. 8 is the spherical aberration diagram that the zoom lens of the present invention is in three positions.
Fig. 9 is the curvature of field figure that the zoom lens of the present invention is in three positions.
Figure 10 is the distortion figure that the zoom lens of the present invention is in three positions.
Detailed description of the invention
Below in conjunction with the accompanying drawings and this utility model is further described by specific embodiment, but protection domain of the present utility model
It is not limited to this.
As it is shown in figure 1, the zoom lens of a kind of quick focusing, along optical axis direction, include negative light successively from object plane end to imaging end
First battery of lens G1 of focal power, the second battery of lens G2 of positive light coke, the 3rd battery of lens G3 of negative power, positive light coke
4th battery of lens G4 and image plane IP；Described first battery of lens G1, the second battery of lens G2, the 3rd battery of lens G3 and the 4th are saturating
The lens of mirror group G4 are spherical lens；As shown in Figure 2, Figure 3 and Figure 4, by regulating distance to each other, it is achieved quickly gather
Burnt.Described first battery of lens G1 includes the first concavees lens, the second concavees lens and the 3rd convex lens successively；Described second battery of lens
G2 includes the first meniscus lens, the second convex lens, the 3rd concavees lens, the 3rd convex lens, the 4th convex lens, the 4th recessed successively
Lens, the 5th convex lens and the 5th concavees lens；Described 3rd battery of lens G3 includes the 6th concavees lens；4th battery of lens G4 is
Two meniscus lenss；It is provided with aperture diaphragm SP between described first meniscus lens and the second convex lens.Described 3rd battery of lens
Following relational expression is met between G3, the 4th battery of lens G4 and this zoom lens three's effective focal length: 1.8 < | fimg/ff|<10.0；
5.0<|fimg/fw|<40.0；
Wherein, fimgIt is the effective focal length of the 4th battery of lens G4, ffIt is the effective focal length of the 3rd battery of lens G3, fwIt it is whole change
Zoom lens is in the effective focal length of wide-angle side.
Each optical element of described Zooming-projection camera lens meets table 1, table 2 and the condition of table 3.Lower list 1 has respectively by putting
To reducing, to hold the optical surface number (Surface#) sequentially numbered, R be that the radius of curvature of optical surface of each lens, D are to big end
Corresponding surface is to distance on the axle on last surface length of optical axis (two surfaces intercept), NdFor corresponding battery of lens to d,
The refractive index of F, j light, VdFor the corresponding battery of lens Abbe number (Abbe number) to d, F, j light, F is that described zoom is thrown
The effective focal length of shadow camera lens.
Table 1 surface data
| Surface | R | D | N | V |
| 1 | 30.452 | 2.30 | 1.77250 | 49.6 |
| 2* | 8.896 | 8.59 | ||
| 3 | -64.867 | 1.20 | 1.77250 | 49.6 |
| 4 | 19.876 | 2.78 | ||
| 5 | 25.154 | 3.91 | 1.73800 | 32.3 |
| 6 | -83.477 | (variable) | ||
| 7 | -94.280 | 1.21 | 1.83400 | 37.2 |
| 8 | -36.820 | 3.50 | ||
| 9(stop) | ∞ | 2.00 | ||
| 10 | 12.993 | 4.68 | 1.51823 | 58.9 |
| 11 | -10.954 | 0.80 | 1.83400 | 37.2 |
| 12 | 19.514 | 0.40 | ||
| 13 | 13.843 | 4.02 | 1.48749 | 70.2 |
| 14 | -13.973 | 0.15 | ||
| 15 | -63.398 | 3.49 | 1.76182 | 26.5 |
| 16 | -8.985 | 0.80 | 1.83400 | 37.2 |
| 17 | -25.030 | 0.15 | ||
| 18 | 30.854 | 5.63 | 1.49700 | 81.5 |
| 19 | -8.100 | 0.80 | 1.88300 | 40.8 |
| 20 | -43.415 | (variable) | ||
| 21 | 62.117 | 0.80 | 1.83400 | 37.2 |
| 22 | 16.329 | (variable) | ||
| 23 | 50.797 | 2.55 | 1.48749 | 70.2 |
| 24 | -419.766 | (variable) | ||
| image | ∞ |
Table 2 aspherical surface data
| Surface | K |
| K | -4.7384E-01 |
| B(4th) | 7.3430E-06 |
| C(6th) | -1.2623E-07 |
| D(8th) | 1.8138E-09 |
Table 3 zoom data
| Specification | Wide-angle side | Centre position | Focal length end |
| f | 11.0 | 15.50 | 22.00 |
| Fno | 4.00 | 4.60 | 5.60 |
| Angle of half field-of view ω | 51.16 | 41.39 | 31.84 |
| Image height | 13.66 | 13.66 | 13.66 |
| Battery of lens overall length | 90.36 | 85.76 | 87.31 |
Such as the difference figure that Fig. 5, Fig. 6 and Fig. 7 are wide-angle side, centre position and focal length end during the different angle of visual field, demonstrate it
The advantage that visual angle is wider；As shown in Figure 8, the longitudinal spherical aberration of its wide-angle side is at-0.06mm-0.05mm, and at focal length end longitudinal direction ball
Difference changes between-0.2mm～0.05mm.As it is shown in figure 9, wherein S and T represents the field of sagitta of arc direction and meridian direction respectively
Bent.During wide-angle side, the excursion of curve S and T is between-0.04mm～0mm, and the excursion of focal length end curve is
Between-0.05mm～0.05mm.As shown in Figure 10, the systematical distortion of wide-angle side is at-0.3%-0.3%, the systematical distortion of focal length end
At-0.02-0.03%.This zoom lens is greatly reduced whole battery of lens, the lightest but also can quickly focus on, and can extensively apply
In digital camera, video camera, TV or cinema scene.
Described embodiment is that of the present utility model preferred embodiment but this utility model is not limited to above-mentioned embodiment,
In the case of flesh and blood of the present utility model, those skilled in the art can make any conspicuously improved,
Replace or modification belongs to protection domain of the present utility model.
Claims (3)
1. the zoom lens of a quick focusing, it is characterised in that along optical axis direction, include successively bearing from object plane end to imaging end
First battery of lens G1 of focal power, the second battery of lens G2 of positive light coke, the 3rd battery of lens G3 of negative power, positive light coke
The 4th battery of lens G4 and image plane IP；Described first battery of lens G1 includes the first concavees lens, the second concavees lens and the 3rd successively
Convex lens；Described second battery of lens G2 includes the first meniscus lens, the second convex lens, the 3rd concavees lens, the 3rd convex successively
Lens, the 4th convex lens, the 4th concavees lens, the 5th convex lens and the 5th concavees lens；Described 3rd battery of lens G3 includes the 6th
Concavees lens；4th battery of lens G4 is the second meniscus lens；It is provided with hole between described first meniscus lens and the second convex lens
Footpath diaphragm SP.
The zoom lens of a kind of quick focusing the most according to claim 1, it is characterised in that described 3rd battery of lens G3,
Following relational expression is met between 4th battery of lens G4 and this zoom lens three's effective focal length:
1.8<|fimg/ff|<10.0；5.0<|fimg/fw|<40.0
Wherein, fimgIt is the effective focal length of the 4th battery of lens G4, ffIt is the effective focal length of the 3rd battery of lens G3, fwIt it is whole change
Zoom lens is in the effective focal length of wide-angle side.
The zoom lens of a kind of quick focusing the most according to claim 1 and 2, it is characterised in that described first battery of lens
G1, the second battery of lens G2, the lens of the 3rd battery of lens G3 and the 4th battery of lens G4 are spherical lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620218321.3U CN205539683U (en) | 2016-03-21 | 2016-03-21 | Zoom of rapid convergence |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620218321.3U CN205539683U (en) | 2016-03-21 | 2016-03-21 | Zoom of rapid convergence |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205539683U true CN205539683U (en) | 2016-08-31 |
Family
ID=56784163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620218321.3U Expired - Fee Related CN205539683U (en) | 2016-03-21 | 2016-03-21 | Zoom of rapid convergence |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205539683U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019211713A (en) * | 2018-06-07 | 2019-12-12 | キヤノン株式会社 | Imaging optical system, image projection device using the same, and image projection system |
-
2016
- 2016-03-21 CN CN201620218321.3U patent/CN205539683U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019211713A (en) * | 2018-06-07 | 2019-12-12 | キヤノン株式会社 | Imaging optical system, image projection device using the same, and image projection system |
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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: 20160831 Termination date: 20170321 |