CN208672900U - A kind of medium wave refrigeration infrared continuous zoom lens - Google Patents
A kind of medium wave refrigeration infrared continuous zoom lens Download PDFInfo
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- CN208672900U CN208672900U CN201821290962.5U CN201821290962U CN208672900U CN 208672900 U CN208672900 U CN 208672900U CN 201821290962 U CN201821290962 U CN 201821290962U CN 208672900 U CN208672900 U CN 208672900U
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Abstract
The utility model discloses a kind of medium wave refrigeration infrared continuous zoom lens, include 5 groups of 7 lens, and group is fixed before being followed successively by from the object side to image side along optical axis, compensation group, zoom group, fixes group and image rotation group afterwards；Wherein, fixed group is fixed first lens before described, compensation group is made of the second lens, second lens move to compensate image planes and move along optical axis, zoom group, that is, the third lens move realization zoom along optical axis, and rear fixed group is made of the 4th lens with the 5th lens, and rear fixed group is fixed, image rotation group is made of the 6th lens with the 7th lens, and image rotation group realizes image rotation and the matched effect of diaphragm.The utility model realizes 10 times or more of high power than continuous vari-focus, and the aspherical usage quantity of simultaneity factor is few, greatly reduces camera lens cost, and the color difference of system is corrected using diffraction surfaces, obtains preferable image quality.
Description
Technical field
The utility model relates to a kind of continuous magnification lens, specially a kind of medium wave refrigeration infrared continuous zoom lens.
Background technique
Refrigeration mode thermal imaging can be realized longer since its F number can achieve 4.0 or more in the limited situation of bore
Focal length, operating distance is farther relative to uncooled IRFPAs, therefore is widely used in military remote monitor environment.
LONG WAVE INFRARED zoom lens disclosed in the prior art is more using number of lenses or entire length is longer, therefore
Cause camera lens heaviness, the low influence imaging effect of transmitance.A kind of high transmittance medium wave of Patent No. 201620925357.5
Infrared zooming lens, although having only used 6 eyeglasses, camera lens entire length is more than that 300mm camera lens is longer.And the patent No.
Although a kind of big zoom ratio medium wave infrared continuous zoom lens entire length for 201420348205.4 only has 160mm,
Used 8 lens, reduced transmitance and affect image quality, at the same used 5 it is aspherical, increase camera lens at
This.
Therefore, the technical problem to be solved by the present invention is to provide a kind of continuous vari-focus compact-sized, transmitance is high
Camera lens.
Utility model content
The utility model provides a kind of medium wave refrigeration infrared continuous zoom lens aiming at above-mentioned defect, should
Zoom lens has the technological merit compact-sized, transmitance is high, has reached 10 times or more continuous vari-focus using 5 groups of 7 lens.
A kind of medium wave refrigeration infrared continuous zoom lens technical solution of the utility model is to include 5 groups of 7 lens, edge
Optical axis fixed group, compensation group, zoom group, rear fixed group and image rotation group before being followed successively by from the object side to image side；Wherein, described preceding fixed
Group is fixed first lens, and compensation group is made of the second lens, and the second lens move to compensate image planes and move along optical axis,
Zoom group, that is, the third lens move realization zoom along optical axis, and rear fixed group is made of the 4th lens with the 5th lens, fix group afterwards
Fixed, image rotation group is made of the 6th lens with the 7th lens, and image rotation group realizes image rotation and the matched effect of diaphragm.
Preceding fixed group focal power is positive, and compensation group focal power is positive, and zoom group focal power is negative, and rear fixed group focal power is
Just.
First lens be all made of with the 4th lens rear surface it is aspherical, and on the basis of aspherical use diffraction surfaces.
First lens use silicon materials, and rest of the lens are all made of germanium material.
First lens are falcate silicon positive lens of a piece of convex surface to object side；Second lens are a piece of convex surfaces to the curved of object side
Month shape germanium positive lens；The third lens are a piece of two-sided germanium negative lenses for concave surface；4th lens are a piece of biconvex germanium positive lens, the
Five lens are falcate germanium positive lens of a piece of convex surface to object side；6th lens are that a piece of convex surface is negative saturating to the falcate germanium of image side
Mirror, the 7th lens are falcate germanium positive lens of a piece of convex surface to image side.
Camera lens from wide-angle state to look in the distance state when, the second positive meniscus lens first moves back towards the first lens along optical axis
Mobile from the first lens, the third lens are moved along optical axis away from the first lens.
Remain that F number is 4 in zooming procedure.
Continuous vari-focus multiple is greater than 10 times, and can cooperate 640 × 512 resolution ratio, and Pixel size is 15 μm of medium wave refrigeration
Detector uses.
The utility model has the following beneficial effects: due to using optical texture just, positive and negative, positive and compensation group c-type
Motion mode so that the utility model can reach 10 times or more of zoom ratio using less eyeglass, and guarantees
Structure it is compact.Due to using less lens numbers, transmitance is improved, so that the lens imaging in the utility model
Effect is good, is easy to adjust and assemble.Meanwhile the utility model only with 2 faces are aspherical and diffraction surfaces reduce camera lens at
This.
Detailed description of the invention:
Fig. 1 is the lens-section figure of the utility model；
Fig. 2 be the utility model infrared continuous zoom lens wide-angle state, middle coke-like state and look in the distance state when change
Burnt process schematic；
Fig. 3 is the utility model wide-angle state modulated transmission function figure；
Fig. 4 is the utility model focal length state modulated transmission function figure；
In figure, group is fixed before 1-, 2- compensation group, 3- zoom group fixes group, 5- image rotation group, the first lens of 11-, 21- after 4-
Second lens, 31- the third lens, the 4th lens of 41-, the 5th lens of 42-, the 6th lens of 51-, the 7th lens of 52-.
Specific embodiment:
The technical side of the utility model is described in detail in the utility model in order to better understand with specific example below
Case, but the utility model is not limited thereto.
Embodiment 1
As shown in Figure 1, the utility model provides a kind of medium wave refrigeration infrared continuous zoom lens, thoroughly comprising 5 groups 7
Mirror, fixed group 1, compensation group 2, zoom group 3, rear fixed group 4 and image rotation group 5 before being followed successively by from the object side to image side along optical axis；Its
In, fixed group 1 is fixed first lens 11 before described, and compensation group 2 is made of the second lens 21, and the second lens 21 are along light
Axis is mobile mobile to compensate image planes, and zoom group 3 is that the third lens 31 along optical axis move realization zoom, rear fixed group 4 by the 4th thoroughly
Mirror 41 and the 5th lens 42 form, and rear fixed group 4 is fixed, and image rotation group 5 is made of the 6th lens 51 with the 7th lens 52, is turned
As group 5 realizes image rotation and the matched effect of diaphragm.
Embodiment 2
As shown in Figure 1 and Figure 2, the utility model provides a kind of medium wave refrigeration infrared continuous zoom lens, includes 5 groups 7
Lens, fixed group 1, compensation group 2, zoom group 3, rear fixed group 4 and image rotation group 5 before being followed successively by from the object side to image side along optical axis；Its
In, fixed group 1 is fixed first lens 11 before described, and compensation group 2 is made of the second lens 21,21 edge of the second lens
Optical axis is mobile mobile to compensate image planes, and zoom group 3 i.e. the third lens 31 move realization zoom along optical axis, and rear group 4 of fixing is by the 4th
Lens 41 and the 5th lens 42 form, and rear fixed group 4 is fixed, and image rotation group 5 is by 52 groups of the 6th lens 51 and the 7th lens
At image rotation group 5 realizes image rotation and the matched effect of diaphragm.
First lens 11 are bent moon silicon positive lens of a piece of convex surface towards object side, and the second lens 21 are a piece of convex surface to object
The falcate germanium positive lens of side, the third lens 31 be it is a piece of it is two-sided be concave surface germanium negative lens, the 4th lens 41 be a piece of biconvex
Germanium positive lens, the 5th lens 42 are falcate germanium positive lens of a piece of convex surface to object side, and the 6th lens 51 are a piece of convex surface to picture
The falcate germanium negative lens of side, the 7th lens 52 are falcate germanium positive lens of a piece of convex surface to image side.
Preceding fixed group 1, compensation group 2, zoom group 3 and rear fixed group 4, focal power is positive respectively, is positive and negative, just.Work as camera lens
Group location status from wide-angle state to look in the distance state change when, compensation group 2 be the second lens 21 along optical axis first towards first thoroughly
The mobile back of mirror 11 is mobile from the first lens 11, and zoom group 3 is that the third lens 31 are moved along optical axis away from the first lens 11.It is above-mentioned
Focal power combination and the motion mode optical zoom that makes lens group realize 10 times or more.
Image rotation group 5 includes the 6th lens 51 and the 7th lens 52,100% cold stop efficiency may be implemented, while can lead to
The mode of image rotation is crossed to reduce the size of telephoto lens front lens.
In the present embodiment, the F number of camera lens is fixed as 4 always, can cooperate 640 × 512 resolution ratio, and Pixel size is
15 μm of medium wave refrigeration detectors use.
Embodiment 3
In the present embodiment, using medium wave as described in example 2 refrigeration infrared continuous zoom lens, the first lens 11 deviate from
The surface of object plane and the 4th lens 41 are aspherical away from the selection of the surface of object plane, and diffraction surfaces are used on the basis of aspherical.
The characteristics of non-spherical lens, is: being consecutive variations from lens centre to periphery curvature.It is certain with having from lens centre to periphery
The spherical lens of curvature is different, and non-spherical lens has more preferably radius of curvature characteristic, has the advantages that improve the aberrations such as spherical aberration,
The visual field is enabled to become much larger and true.After non-spherical lens, appearance when imaging can be eliminated as much as possible
Aberration, so as to improve image quality.
Usual aspherical shape expression formula are as follows:
Z represents the position of optical axis direction, and r represents the height in the vertical direction of opposite optical axis, and c represents radius of curvature, k
Represent circular cone coefficient, α4、α6、α8…Represent asphericity coefficient.
In aspherical shape data, E-n represents " × 10-n", such as 2.01E-06 represents 2.01 × 10-6。
In the present embodiment, the use of diffraction surfaces can change the focal position of different-waveband light, can correct focal length
The color difference of system, so as to improve image quality.
Diffraction surfaces expression formula are as follows:
Φ=A1ρ2+A2ρ2
Wherein Φ is the position phase of diffraction surfaces, ρ=r/rn, rnIt is the planning radius of diffraction surfaces, A1、 A2For the position phase of diffraction surfaces
Coefficient.
The utility model is described in more detail referring to following table.
The zoom ratio of camera lens in this programme is 10.6 times, longest focal length 320mm, shortest focal length 30mm.
Wherein, table one is the optical component parameter table of the present embodiment.
D1 is the spacing of the first lens 11 and the second lens 21 in table one, and D2 is the second lens 21 and the third lens 31
Spacing, D3 are the spacing of the third lens 31 and the 4th lens 41.
Table one: optical component parameter table
Table two: the relationship of zoom position and lens group spacing
Table three: asphericity coefficient
Table four: diffraction surfaces coefficient
| A1 | A2 | |
| Aspherical 1 | 32.155978 | 0.298415 |
| Aspherical 2 | -40.490544 | -6.290909 |
Fig. 3 and Fig. 4 be the utility model wide-angle state and look in the distance state when modulation transfer function figure, and its horizontal axis is
Every millimeter of demand pairs (line pair per millimeter), the longitudinal axis are contrast numerical value.
From in figure we it can be found that either wide-angle state still this system under the state of looking in the distance can obtain compared with
The image of high-quality, the utility model medium wave freeze infrared continuous zoom lens with preferable optical effect.
Claims (8)
- The infrared continuous zoom lens 1. a kind of medium wave freezes, which is characterized in that include 5 groups of 7 lens, along optical axis from object side to picture Side fixed group, compensation group, zoom group, rear fixed group and image rotation group before being followed successively by；Wherein, the preceding fixed group is fixed First lens, compensation group are made of the second lens, and the second lens move to compensate image planes and move along optical axis, and zoom group, that is, third is saturating Mirror moves realization zoom along optical axis, and rear fixed group is made of the 4th lens with the 5th lens, fixed, the image rotation group of rear fixed group It is made of the 6th lens with the 7th lens, image rotation group realizes image rotation and the matched effect of diaphragm.
- The infrared continuous zoom lens 2. a kind of medium wave according to claim 1 freezes, which is characterized in that preceding fixed group light focus Degree is positive, and compensation group focal power is positive, and zoom group focal power is negative, and rear fixed group focal power is positive.
- The infrared continuous zoom lens 3. a kind of medium wave according to claim 1 freezes, which is characterized in that the first lens and the Four lens rear surfaces be all made of it is aspherical, and on the basis of aspherical use diffraction surfaces.
- The infrared continuous zoom lens 4. a kind of medium wave according to claim 1 freezes, which is characterized in that first lens Using silicon materials, rest of the lens are all made of germanium material.
- The infrared continuous zoom lens 5. a kind of medium wave according to claim 1 freezes, which is characterized in that the first lens are one Falcate silicon positive lens of the piece convex surface to object side；Second lens are falcate germanium positive lens of a piece of convex surface to object side；Third is saturating Mirror is a piece of two-sided germanium negative lens for concave surface；4th lens be a piece of biconvex germanium positive lens, the 5th lens be a piece of convex surface to The falcate germanium positive lens of object side；6th lens are falcate germanium negative lens of a piece of convex surface to image side, and the 7th lens are a piece of Falcate germanium positive lens of the convex surface to image side.
- The infrared continuous zoom lens 6. a kind of medium wave according to claim 1 freezes, which is characterized in that camera lens is from wide-angle shape State to look in the distance state when, the second positive meniscus lens first moves back and moves from the first lens along optical axis towards the first lens, third Lens are moved along optical axis away from the first lens.
- The infrared continuous zoom lens 7. a kind of medium wave according to claim 6 freezes, which is characterized in that begin in zooming procedure Keeping F number eventually is 4.
- The infrared continuous zoom lens 8. a kind of medium wave according to claim 1 freezes, which is characterized in that continuous vari-focus multiple Greater than 10 times, and 640 × 512 resolution ratio can be cooperated, Pixel size is that 15 μm of medium wave refrigeration detectors use.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821290962.5U CN208672900U (en) | 2018-08-10 | 2018-08-10 | A kind of medium wave refrigeration infrared continuous zoom lens |
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| CN201821290962.5U CN208672900U (en) | 2018-08-10 | 2018-08-10 | A kind of medium wave refrigeration infrared continuous zoom lens |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108761748A (en) * | 2018-08-10 | 2018-11-06 | 济南和普威视光电技术有限公司 | A kind of medium wave refrigeration infrared continuous zoom lens |
| CN110543004A (en) * | 2019-08-27 | 2019-12-06 | 杭州图谱光电科技有限公司 | Digital microscope objective with high magnification and large zoom ratio |
-
2018
- 2018-08-10 CN CN201821290962.5U patent/CN208672900U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108761748A (en) * | 2018-08-10 | 2018-11-06 | 济南和普威视光电技术有限公司 | A kind of medium wave refrigeration infrared continuous zoom lens |
| CN110543004A (en) * | 2019-08-27 | 2019-12-06 | 杭州图谱光电科技有限公司 | Digital microscope objective with high magnification and large zoom ratio |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A medium wave refrigeration infrared continuous zoom lens Effective date of registration: 20211222 Granted publication date: 20190329 Pledgee: Qilu bank Limited by Share Ltd. Ji'nan Road No seven branch Pledgor: JINAN HOPE-WISH PHOTOELECTRONIC TECHNOLOGY CO.,LTD. Registration number: Y2021370000151 |
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| 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 |
Date of cancellation: 20230220 Granted publication date: 20190329 Pledgee: Qilu bank Limited by Share Ltd. Ji'nan Road No seven branch Pledgor: JINAN HOPE-WISH PHOTOELECTRONIC TECHNOLOGY CO.,LTD. Registration number: Y2021370000151 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |