CN207216123U - A kind of big focal length salt free ligands face medium-wave infrared double-view field camera lens - Google Patents
A kind of big focal length salt free ligands face medium-wave infrared double-view field camera lens Download PDFInfo
- Publication number
- CN207216123U CN207216123U CN201721049940.5U CN201721049940U CN207216123U CN 207216123 U CN207216123 U CN 207216123U CN 201721049940 U CN201721049940 U CN 201721049940U CN 207216123 U CN207216123 U CN 207216123U
- Authority
- CN
- China
- Prior art keywords
- lens
- piece
- camera lens
- focal length
- group
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model discloses a kind of big focal length salt free ligands face medium-wave infrared double-view field camera lens, there are five groups of lens successively from object space to image space, including：First fixed group with positive light coke, be a piece of falcate silicon positive lens convex surface facing object space and a piece of germanium negative lens convex surface facing object space；Zoom group with negative power, it is two panels germanium negative lens；Latter fixed group with positive light coke, to be a piece of convex surface facing the zinc sulphide negative lens of object space and the silicon positive lens of a piece of biconvex；Secondary imaging group with positive light coke, for the zinc selenide positive lens of a piece of biconvex, the zinc sulphide negative lens of a piece of concave-concave, the silicon positive lens of a piece of biconvex.The utility model can be in two focal length switchings of 75mm and 300mm, and F numbers are 4.0, suitable for 320 × 256 Pixel size of resolution ratio, 30 μm of medium wave refrigeration detector；Two visual field handoff procedure zoom group shift motions are short, and optical axis stable is high, there is good imaging effect.
Description
Technical field
The utility model belongs to optical technical field, is related to a kind of big focal length salt free ligands face for medium wave refrigeration detector
Medium-wave infrared double-view field camera lens.
Background technology
With the development of infrared imagery technique, infrared optical system is more and more applied to Military and civil fields.Wherein monitor,
Military field has urgent demand to big focal length lenses in super remote target acquisition.Compared to the uncooled detector system of identical focal length
System, refrigeration mode infrared system have the characteristics of sensitivity is high, there is stronger search ability of discovery, can more play the spy of big focal length lenses
It is long.But focal length lenses aberration is larger greatly, state's inner lenses correct aberration using diffraction surfaces mostly at present.The use of diffraction surfaces can drop
Low camera lens energetic transmittance, system temperature difference sensitivity is reduced, and increase camera lens difficulty of processing and cost.Therefore a kind of nothing is researched and developed
The big focal length refrigeration mode camera lens of diffraction surfaces has very big demand.
Utility model content
It is 4.0 that the technical problems to be solved in the utility model, which is to provide a kind of F numbers, the total length of optics, small volume, adjustment side
Just, the high big focal length salt free ligands face medium-wave infrared double-view field camera lens of image quality.Its service band is 3.7~4.8 microns, focal length
For 75mm/300mm, F numbers are 4.0, and adaptation resolution ratio is 320x256, the uncooled detector that 30 microns of Pixel size, optical system
Unite overall length 200mm, maximum caliber 78mm.
To achieve these goals, the technical solution adopted in the utility model is：
A kind of big focal length salt free ligands face medium-wave infrared double-view field camera lens, are included successively by object space to image space, first fixed group, change
Times group, group, secondary imaging group and explorer portion are fixed afterwards；
Fixed group of first fixed group with positive light coke, is a piece of falcate silicon positive lens convex surface facing object space before described
With a piece of germanium negative lens convex surface facing object space；
The zoom group has the zoom group of negative power, is two panels germanium negative lens；Total shift motion of the lens
20.8mm；
Latter fixed group with positive light coke of fixed group after described, be a piece of zinc sulphide negative lens convex surface facing object space and
The silicon positive lens of a piece of biconvex；
The secondary imaging group has the secondary imaging group of positive light coke, is the zinc selenide positive lens of a piece of biconvex, a piece of
The zinc sulphide negative lens of concave-concave, the silicon positive lens of a piece of biconvex
It is medium wave refrigeration detector part after the secondary imaging group, including protecting window and image planes；Aperture diaphragm position
Keep constant between protecting window and image planes, in zooming procedure.
The horizontal field of view angular region of the camera lens is：2w=7.3 °~1.8 °.
The camera lens meets following parameter：
Effective focal length EFL=75mm/300mm, F number=4.0 of the camera lens, optical system overall length=200mm, adaptation are visited
Survey device resolution ratio 320x256,30 μm of Pixel size.
The average MTF at 20lp/mm of the full filed of the camera lens>0.5.
Aspherical in the eyeglass of the camera lens meets following expression formula：
Wherein z be it is aspherical along optical axis direction when being highly r position, away from aspheric vertex of surface apart from rise, c is represented
The vertex curvature on surface, k are circular cone coefficient, α2、α3、α4、α5、α6For high order aspheric surface coefficient.
The beneficial effects of the utility model are：Complete burnt section aperture F4.0, possesses 4 times of zoom ratios, optical system overall length is
200mm, maximum caliber 78mm.Compact-sized, zoom curve smoothing, eyeglass maximum amount of movement is 20.8mm.Zoom group has two panels
Lens, it so can preferably share first time imaging group aberration and correct pressure, lifting system tolerance sensitivities.Simultaneously using folding
Formula optical texture is penetrated, without adjustment speculum, adjustment is easy, is easy to volume production.Image quality is excellent in whole zooming range, regards entirely
The average MTF at 20lp/mm of field>0.5.
Brief description of the drawings
Fig. 1 is when the focal length of big focal length salt free ligands face medium-wave infrared double-view field camera lens provided by the utility model is 75mm
Optical system diagram；
Fig. 2 is when the focal length of big focal length salt free ligands face medium-wave infrared double-view field camera lens provided by the utility model is 75mm
Point range figure；
Fig. 3 is when the focal length of big focal length salt free ligands face medium-wave infrared double-view field camera lens provided by the utility model is 75mm
Optical transfer function figure (cut-off resolution ratio is 20llp/mm)；
Fig. 4 is the focal length of big focal length salt free ligands face medium-wave infrared double-view field camera lens provided by the utility model when being 300mm
Astigmatism distortion figure；
Fig. 5 is the focal length of big focal length salt free ligands face medium-wave infrared double-view field camera lens provided by the utility model when being 300mm
Optical system diagram；
Fig. 6 is the focal length of big focal length salt free ligands face medium-wave infrared double-view field camera lens provided by the utility model when being 300mm
Point range figure；
Fig. 7 is the focal length of big focal length salt free ligands face medium-wave infrared double-view field camera lens provided by the utility model when being 300mm
Optical transfer function figure (cut-off resolution ratio is 20llp/mm)；
Fig. 8 is the focal length of big focal length salt free ligands face medium-wave infrared double-view field camera lens provided by the utility model when being 300mm
Astigmatism distortion figure；
Wherein, 200- object spaces, fix group before 110-, 120- zoom groups, fix group after 130-, 140- secondary imaging groups,
Group, the protecting window of 312- detectors first, 314- detector Second Protection Window mouths, 316- light are fixed after 310- detector assemblies
Door screen, 318- image planes, S1~S10 are each surface of lens.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further details by embodiment.
The embodiment is that the utility model is stared applied to 30 μm of 320 × 256 pixel dimension of long wave non-refrigeration type resolution ratio
The example of formed coke planar detector.
Fig. 1, Fig. 5 are respectively optical system diagram of the utility model in focal length 75mm, 300mm, the structure of the camera lens
It is identical, explanation is used as by taking one of figure as an example.
As shown in figure 1, preceding fixed group 110, the zoom group 120 of negative power, positive light coke of this implementation by positive light coke
Rear fixed group 130, the secondary imaging group 140 of positive light coke and last detector 310 form.
Preceding fixed group 110 i.e. the first lens and the second lens, the first lens are the positive lens convex surface facing object space, and material is
Silicon single crystal；Second lens are the negative lens convex surface facing object space, and material is germanium single crystal.Zoom group 120 is the 3rd lens and the 4th
Lens, the 3rd lens are negative lens bending to the right, and S6 surfaces are aspherical；Material is germanium single crystal, and the 4th lens are double concave
For negative lens, material is germanium single crystal.The group is mobile group, plays a part of zoom, total shift motion in visual field handoff procedure
20.8mm；Fixed group 130 i.e. the 5th lens and the 6th lens afterwards, the 5th lens are negative lens bending to the right, and material is hot pressing
Zinc sulphide, S10 surfaces are aspherical；6th lens are lenticular positive lens, and material is silicon single crystal.Secondary imaging group 140 is
7th lens, the 8th lens and the 9th lens, the 7th lens are lenticular positive lens, and material is zinc selenide, and S14 surfaces are aspheric
Face.Medium wave uncooled detector 310 includes：First protecting window 312, Second Protection Window mouth 314, diaphragm 316, imaging surface 318,
Resolution ratio is 320 × 256, the μ of Pixel size 30.
Effective focal length EFL=75mm/300mm, F number=4.0 of the camera lens, optics overall length=200mm.The camera lens
The average MTF at 20lp/mm of full filed>0.5.
In nine lens of the above, the first lens S1 surfaces coating diamond-like carbon film, because this is surface exposed, it is necessary to plate eka-gold
Diamond carbon film carbon film plays protective effect, and anti-reflection film is plated on remaining S2~S18 surface.
Table 1 is Optic structure parameter of the utility model in focal length 75mm, 300mm：
Table 1
| Surface | Radius of curvature | Thickness (interval) during 75mm/300mm | Material | Bore |
| S1 | 87.206 | 8.4 | SILICON | 78 |
| S2 | 188.22789 | 7.37 | 73.8 | |
| S3 | 203.2 | 3.8 | GERMANIUM | 64.7 |
| S4 | 142.43 | 48.37/27.65 | 62.1 | |
| S5 | 85.11 | 2.4 | GERMANIUM | 20.5 |
| S6 | 71.25677 | 2.4 | 19.6 | |
| S7 | -73.21 | 2.4 | GERMANIUM | 17.2 |
| S8 | 126.96 | 10.04/30.78 | 17.4 | |
| S9 | 219.73 | 2 | ZNS | 26 |
| S10 | 80.68598 | 0.9 | 22.8 | |
| S11 | 81.83 | 3.8 | SILICON | 26 |
| S12 | -133.1 | 60.22 | 26 | |
| S13 | 34.72 | 2.7 | ZNSE | 13 |
| S14 | -18.00828 | 2 | 13 | |
| S15 | -14.125 | 2 | ZNS | 10.2 |
| S16 | 18.34927 | 4 | 10.6 | |
| S17 | -113.964 | 4 | SILICON | 14.4 |
| S18 | -18.83 | 7 | 17 |
Refer to aspherical in nine lens of the above, be even aspheric surface, its expression formula is as follows
Wherein z be it is aspherical along optical axis direction when being highly r position, away from aspheric vertex of surface apart from rise, c is represented
The vertex curvature on surface, k are circular cone coefficient, α2、α3、α4、α5、α6For high order aspheric surface coefficient.
Table 2 is surface S6, S10, S14 asphericity coefficient：
Table 2
| Surface | α2 | α3 | α4 | α5 |
| S6 | -1.0075112e-006 | -5.6693655e-011 | -1.2137616e-011 | 3.2898479e-014 |
| S10 | 2.852666e-006 | 5.1353675e-011 | -8.3081179e-012 | 2.2016363e-014 |
| S14 | 0.00015795924 | -4.9451443e-007 | 1.4188804e-008 | -2.255978e-010 |
Further detailed description is done to effect of the present utility model referring to Aberration Analysis figure.
Fig. 2-Fig. 4 is aberration of the specific embodiment of the long-wave infrared continuous zoom lens described in Fig. 1 in focal length state
Analysis chart, Fig. 2 are that point range figure, Fig. 3 are that MTF figures, Fig. 4 are curvature of field distortion figures；
Fig. 6 Fig. 8 is the specific embodiment of the long-wave infrared continuous zoom lens described in Fig. 5 aberration in middle coke-like state point
Analysis figure, Fig. 6 are that point range figure, Fig. 7 are that MTF figures, Fig. 8 are curvature of field distortion figures；
It can be found that the various aberrations of each burnt section have obtained good correction from figure, disc of confusion is corrected to close
Ai Liban sizes, MTF distort close to diffraction limit<1%.
As can be seen here, the big focal length salt free ligands face medium-wave infrared double-view field camera lens of the utility model have good imaging matter
Amount.
Finally it should be noted that：Above example only not limits the utility model and retouched to illustrate the utility model
The technical scheme stated.Therefore, although this specification has been carried out being described in detail with reference to the above embodiments to the utility model,
But it will be understood by those within the art that, still the utility model can be modified or equivalent substitution；And one
The technical scheme for not departing from spirit and scope of the present utility model and its improvement are cut, it all should cover in right of the present utility model
Among claimed range.
Claims (6)
- A kind of 1. big focal length salt free ligands face medium-wave infrared double-view field camera lens, it is characterised in that：Before being included successively to image space by object space Fixed group, zoom group, group, secondary imaging group and explorer portion are fixed afterwards；Fixed group has positive light coke before described, for a piece of falcate silicon positive lens convex surface facing object space and it is a piece of convex surface facing The germanium negative lens of object space, surface type are sphere；The zoom group has negative power, is two panels germanium negative lens, wherein first negative lens is non-towards the side of image space Sphere, total shift motion 20.8mm of zoom group lens；Fixed group has negative power after described, be the silicon of a piece of zinc sulphide negative lens convex surface facing object space and a piece of biconvex just Lens；Wherein zinc sulphide negative lens is aspherical towards the side of image space；The secondary imaging group has positive light coke, is the zinc selenide positive lens of a piece of biconvex, and the zinc sulphide of a piece of concave-concave is negative saturating Mirror, wherein the silicon positive lens of a piece of biconvex, zinc selenide lens are aspherical towards the side of image space；It is medium wave refrigeration detector part after the secondary imaging group, including protecting window and image planes；Aperture diaphragm is positioned at guarantor Protect between window and image planes.
- 2. big focal length salt free ligands face medium-wave infrared double-view field camera lens according to claim 1, it is characterised in that the camera lens Meet following parameter：Effective focal length EFL=75/300mm, F number=4.0 of the camera lens, optical system overall length=200mm, adaptation detector point Resolution 320 × 256,30 μm of Pixel size.
- 3. big focal length salt free ligands face medium-wave infrared double-view field camera lens according to claim 1, it is characterised in that the camera lens Full filed the average MTF at 20lp/mm>0.5.
- 4. big focal length salt free ligands face medium-wave infrared double-view field camera lens according to claim 1, it is characterised in that the camera lens Eyeglass in aspherical meet following expression formula：Wherein z be it is aspherical along optical axis direction when being highly r position, away from aspheric vertex of surface apart from rise, c represents surface Vertex curvature, k is circular cone coefficient, α2、α3、α4、α5、α6For high order aspheric surface coefficient.
- 5. big focal length salt free ligands face medium-wave infrared double-view field camera lens according to claim 1, it is characterised in that the camera lens Eyeglass in be not used diffraction surfaces.
- 6. big focal length salt free ligands face medium-wave infrared double-view field camera lens according to claim 1, it is characterised in that the camera lens Horizontal field of view angular region be：2w=7.3 °~1.8 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721049940.5U CN207216123U (en) | 2017-08-22 | 2017-08-22 | A kind of big focal length salt free ligands face medium-wave infrared double-view field camera lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721049940.5U CN207216123U (en) | 2017-08-22 | 2017-08-22 | A kind of big focal length salt free ligands face medium-wave infrared double-view field camera lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207216123U true CN207216123U (en) | 2018-04-10 |
Family
ID=61816013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721049940.5U Active CN207216123U (en) | 2017-08-22 | 2017-08-22 | A kind of big focal length salt free ligands face medium-wave infrared double-view field camera lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207216123U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594410A (en) * | 2018-04-13 | 2018-09-28 | 北京理工大学 | Six times of continuous zooming optical systems of hemispherical space far infrared |
| CN111290103A (en) * | 2020-02-20 | 2020-06-16 | 北京华北莱茵光电技术有限公司 | Large-area-array medium-wave infrared double-view-field optical system |
| CN111505801A (en) * | 2020-05-18 | 2020-08-07 | 吉林工程技术师范学院 | Medium wave infrared optical system |
| CN112534349A (en) * | 2018-09-27 | 2021-03-19 | 无锡安科迪智能技术有限公司 | VCM-based optical device, system and imaging method thereof |
| CN113866937A (en) * | 2021-09-03 | 2021-12-31 | 中国电子科技集团公司第十一研究所 | Infrared dual-waveband wide-angle athermal confocal plane optical system |
| CN116299960A (en) * | 2022-12-14 | 2023-06-23 | 福建福光股份有限公司 | Large-aperture wide-angle medium-wave infrared lens and imaging method thereof |
-
2017
- 2017-08-22 CN CN201721049940.5U patent/CN207216123U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594410A (en) * | 2018-04-13 | 2018-09-28 | 北京理工大学 | Six times of continuous zooming optical systems of hemispherical space far infrared |
| CN108594410B (en) * | 2018-04-13 | 2020-06-05 | 北京理工大学 | Hemispherical space far infrared six-time continuous zooming optical system |
| CN112534349A (en) * | 2018-09-27 | 2021-03-19 | 无锡安科迪智能技术有限公司 | VCM-based optical device, system and imaging method thereof |
| CN111290103A (en) * | 2020-02-20 | 2020-06-16 | 北京华北莱茵光电技术有限公司 | Large-area-array medium-wave infrared double-view-field optical system |
| CN111505801A (en) * | 2020-05-18 | 2020-08-07 | 吉林工程技术师范学院 | Medium wave infrared optical system |
| CN111505801B (en) * | 2020-05-18 | 2021-09-14 | 吉林工程技术师范学院 | Medium wave infrared optical system |
| CN113866937A (en) * | 2021-09-03 | 2021-12-31 | 中国电子科技集团公司第十一研究所 | Infrared dual-waveband wide-angle athermal confocal plane optical system |
| CN113866937B (en) * | 2021-09-03 | 2023-12-26 | 中国电子科技集团公司第十一研究所 | Infrared dual-band wide-angle athermal confocal plane optical system |
| CN116299960A (en) * | 2022-12-14 | 2023-06-23 | 福建福光股份有限公司 | Large-aperture wide-angle medium-wave infrared lens and imaging method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207216123U (en) | A kind of big focal length salt free ligands face medium-wave infrared double-view field camera lens | |
| CN203981958U (en) | A kind of large zoom ratio medium wave infrared continuous zoom lens | |
| CN209167667U (en) | A kind of big zoom ratio medium-wave infrared refrigeration continuous magnification lens | |
| CN205539680U (en) | Long -focus long wave infrared continuous zoom lens | |
| CN108445611A (en) | Without the high-resolution tight shot of thermalization | |
| CN206906683U (en) | Panoramic shooting camera lens | |
| CN205539681U (en) | Become multiple proportions long wave infrared continuous -zoom lens greatly | |
| CN210090814U (en) | Long-focus medium-wave infrared refrigeration double-view-field lens | |
| CN205263386U (en) | Long -focus long wave infrared continuous zoom lens | |
| CN208984871U (en) | A kind of big visual field LONG WAVE INFRARED fish eye lens | |
| CN209182565U (en) | A kind of economical LONG WAVE INFRARED optics is without thermalization camera lens | |
| CN207216116U (en) | One kind miniaturization salt free ligands face medium-wave infrared double-view field camera lens | |
| CN205787330U (en) | A kind of long-wave infrared continuous zoom lens | |
| CN209182571U (en) | A kind of economical long-wave infrared continuous zoom lens of portable long-focus | |
| CN207216121U (en) | A kind of large aperture wide-angle LONG WAVE INFRARED tight shot | |
| CN114019652A (en) | Wide-angle large-target-surface small-distortion optical fixed-focus lens | |
| CN205427294U (en) | Big light ring long wave infrared continuous zooming monitoring camera | |
| CN203965714U (en) | A kind of long-focus long-wave infrared continuous zoom lens | |
| CN209167662U (en) | A kind of rifle takes aim at type LONG WAVE INFRARED without thermalization camera lens | |
| CN207216125U (en) | One kind turn back formula medium-wave infrared refrigeration camera lens | |
| CN205809399U (en) | A kind of long-focus cut-in type medium wave refrigeration mode double-view field infrared optical lens | |
| CN110441888B (en) | Fixed focus lens | |
| CN107797260A (en) | The economical tight shots of 4mm day and night ultra high-definition 4K | |
| CN114609767A (en) | Compact type large-zoom-ratio medium-wave refrigeration infrared continuous zoom lens based on diffraction surface | |
| CN205263390U (en) | Big light ring continuous -zoom lens of general type of long wave infrared |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |