CN109324402A - A kind of visible light near-infrared broadband apochromatism continuous zooming optical camera lens - Google Patents
A kind of visible light near-infrared broadband apochromatism continuous zooming optical camera lens Download PDFInfo
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- CN109324402A CN109324402A CN201811315701.9A CN201811315701A CN109324402A CN 109324402 A CN109324402 A CN 109324402A CN 201811315701 A CN201811315701 A CN 201811315701A CN 109324402 A CN109324402 A CN 109324402A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/163—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
- G02B15/167—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
- G02B15/173—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses arranged +-+
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Abstract
The present invention relates to a kind of visible light near-infrared broadband apochromatism continuous zooming optical camera lenses, using the method for low dispersion and other optical glass Proper Matchs, the second order spectrum problem for eliminating the introducing of visible light near-infrared broadband, by optical system color difference control in zone of reasonableness；Using the zoom mode of the three-group linkage in mechanical compensation Zooming method, guarantee the high-resolution imaging of entire zoom section while effectively shortening optical system length；It using the method that negative vignetting is arranged, ensure that in entire zooming procedure, each zoom position diaphragm bore is consistent, realizes and determines diaphragm bore change F number, while the uniformity of the image planes relative illumination of each zoom position has been effectively ensured；Guarantee provide the image of high-resolution round the clock in entire zoom section；It using general-purpose optical glass material and full spherical design, reduces costs, and optical imagery function admirable.
Description
Technical field
The invention belongs to optical technologies, are related to a kind of visible light near-infrared broadband apochromatism continuous zooming optical mirror
Head.
Background technique
Continuous magnification lens be a kind of focal length can consecutive variations and image planes position keep stablizing and the picture in zooming procedure
Good imaging system is held in quality guarantee.Fixed-focus thermal infrared imager is intended to obtain different size of picture in image planes, it is necessary to change object
The distance between body and camera lens or the camera lens for replacing different focal length.And continuous magnification lens can continuously change system focal length, because
This, can obtain the target picture for continuously changing size in image planes, all highly beneficial for optical detection and reconnaissance, tracking etc..
Important component of the continuous magnification lens as all kinds of electro-optical systems is widely used in the fields such as photoelectronic reconnaissance and monitoring.
With CCD, the continuous improvement of cmos device scale and resolution ratio, and to photodetection under environmental condition round the clock,
The demand of monitoring, the demand to the high Qinghua of continuous magnification lens are also increasingly strong.
The present invention describes a kind of visible light near-infrared broadband apochromatism continuous zooming optical lens design in detail, should
Continuous zooming optical camera lens is effectively matched using low dispersion with other optical glass, by optical system color difference control reasonable
Range；Using the zoom mode of three-group linkage, optical system length is effectively shortened, and guarantees the high-resolution of entire zoom section
Imaging；Changeable visible light, near infrared filter built in by CCD, cmos device guarantee round the clock in entire zoom section
The image of high-resolution is provided；Camera lens uses the full spherical design of general-purpose optical glass material, reduces costs, and optical property is excellent
It is good.
Summary of the invention
Technical problems to be solved
In order to avoid the shortcomings of the prior art, the present invention proposes that a kind of visible light near-infrared broadband apochromatism connects
Continuous focal optical lens.
Technical solution
A kind of visible light near-infrared broadband apochromatism continuous zooming optical camera lens, it is characterised in that including being walked by optical path
The zoom group G2 that is negative to successively the focal power of coaxial setting is positive from the object side to the image side preceding fixed group G1, focal power, diaphragm,
The rear fixed group G5 that the compensation group G4 and focal power that compensation group G3 that focal power is positive, focal power are negative are positive；Focal power is positive
Preceding fixed group G1, the compensation group G3 that is positive of the zoom group G2 that is negative of focal power, focal power, the focal power compensation group G4 that is negative
Focal length meets following relational expression:
0.30≤f1/ft≤0.35
0.55≤f2/f3≤0.60
0.75≤f2/f4≤0.80
Wherein, f1 is the focal length value for the preceding fixed group G1 that focal power is positive；F2 is the coke for the zoom group G2 that focal power is negative
Away from value；F3 is the focal length value for the compensation group G3 that focal power is positive；F4 is the focal length value for the compensation group G4 that focal power is negative；Ft is institute
State the focal length value of optical lens most focal length.
The image planes that optical path is CCD or CMOS after the rear fixed group G5 that the focal power is positive.
The preceding fixed group G1 that the focal power is positive includes the positive light coke of the coaxial setting of direction sequence from the object side to the image side
Biconvex lens L11, negative power cemented doublet L12, positive light coke meniscus lens L13.
The zoom group G2 that the focal power is negative includes that the negative power of the coaxial setting of direction sequence from the object side to the image side is curved
Moon lens L21, three balsaming lens L22 of negative power, negative power biconcave lens L23.
The compensation group G3 that the focal power is positive includes that the positive light coke of the coaxial setting of direction sequence from the object side to the image side is double
Balsaming lens L31, negative power cemented doublet L32, positive light coke biconvex lens L33, negative power meniscus lens L34, just
Focal power meniscus lens L35.
The compensation group G4 that the focal power is negative is negative power biconcave lens L41.
The rear fixed group G5 that the focal power is positive includes the positive light coke of the coaxial setting of direction sequence from the object side to the image side
Meniscus lens L51, positive light coke meniscus lens L52.
Positive light coke biconvex lens L11, the negative power cemented doublet for the preceding fixed group G1 that the focal power is positive
L12, positive light coke meniscus lens L13, positive light coke cemented doublet L31, the positive light coke of the compensation group G3 that focal power is positive
Biconvex lens L33 has been all made of low dispersion HFK61.
It using the method that negative vignetting is arranged, ensure that in entire zooming procedure, each zoom position diaphragm bore is consistent, real
Show and determined diaphragm bore change F number, while the uniformity of the image planes relative illumination of each zoom position has been effectively ensured.
The operating spectral range of optical system is 486nm~900nm, and focal length is 10.266mm~260mm, zoom ratio 25
Times, relative aperture is variable for 1:3~1:6, optical length 155mm, and field angle is 30.8 °~1.25 °.
Beneficial effect
A kind of visible light near-infrared broadband apochromatism continuous zooming optical camera lens proposed by the present invention, using low dispersion
The method of glass and other optical glass Proper Matchs eliminates the second order spectrum problem of visible light near-infrared broadband introducing,
By optical system color difference control in zone of reasonableness；Using the zoom mode of the three-group linkage in mechanical compensation Zooming method, having
The high-resolution imaging for guaranteeing entire zoom section while shortening optical system length of effect；Using the method that negative vignetting is arranged,
It ensure that in entire zooming procedure, each zoom position diaphragm bore is consistent, realizes and determines diaphragm bore change F number, while effectively
It ensure that the uniformity of the image planes relative illumination of each zoom position；Changeable visible light built in by CCD, cmos device,
Near infrared filter realizes the switching imaging of visible light and near infrared band, guarantees provide height round the clock in entire zoom section
Clearly image；It using general-purpose optical glass material and full spherical design, reduces costs, and optical imagery performance is excellent
It is good.
The solution have the advantages that:
1, three-group linkage continuous vari-focus: provided with G1 is organized in the preceding fixation that focal power is positive, focal power is negative in the present invention
Be positive latter fixed group of compensation group G4 that compensation group G3 that zoom group G2, diaphragm, focal power are positive, focal power are negative, focal power
G5, wherein zoom group G2, which is realized, realizes compensation to light after zoom to the zoom, compensation group G3 and the compensation group G4 that receive light,
It is set, is finally realized visible by the focal length value to preceding fixed group G1, zoom group G2, compensation group G3, compensation group G4 again
Light near-infrared broadband apochromatism and continuous vari-focus.
2, disappear second order spectrum: by using the method for low dispersion and other optical glass Proper Matchs, eliminating can
The second order spectrum problem that light-exposed near-infrared broadband introduces, makes optical system color difference obtain good correction.
3, fixed aperture becomes F number: using the method that negative vignetting is arranged, ensure that in entire zooming procedure, each zoom position
It is consistent to set diaphragm bore, realizes and determines diaphragm bore change F number, while the image planes relative illumination of each zoom position has been effectively ensured
Uniformity, eliminate change diaphragm mechanism, reliability improves.
4, at low cost, machinability is high: the present invention is being guaranteed using normal optical glass material using full spherical design
On the basis of performance, cost has been saved.
Detailed description of the invention
Fig. 1 is short focus of the present invention (10.266mm) index path；
Wherein, first fixed group of G1-is made of 4 groups of lens L11, L12, L13；G2-zoom group, by 3 groups of lens L21,
L22, L23 composition；G3-compensation group is made of 5 groups of lens L31, L32, L33, L34, L35；G4-compensation group, by 1 group of lens
L41 composition；G5-fixes group afterwards, is made of 2 groups of lens L51, L52.
Fig. 2 is mid-focal length of the present invention (100mm) index path；
Fig. 3 is longest focal length of the present invention (260mm) index path；
Fig. 4 is shortest focal length of the present invention (10.266mm) optical transfer function figure；
Fig. 5 is mid-focal length of the present invention (100mm) optical transfer function figure；
Fig. 6 is longest focal length of the present invention (260mm) optical transfer function figure；
Fig. 7 is shortest focal length of the present invention (10.266mm) image planes relative illumination figure；
Fig. 8 is mid-focal length of the present invention (100mm) image planes relative illumination figure；
Fig. 9 is longest focal length of the present invention (260mm) image planes relative illumination figure.
Specific embodiment
Now in conjunction with embodiment, attached drawing, the invention will be further described:
A kind of visible light near-infrared broadband apochromatism continuous zooming optical camera lens is provided, which uses
The method of low dispersion and other optical glass Proper Matchs eliminates the second order spectrum of visible light near-infrared broadband introducing
Problem, by optical system color difference control in zone of reasonableness；Using the zoom mode of the three-group linkage in mechanical compensation Zooming method,
Guarantee the high-resolution imaging of entire zoom section while effectively shortening optical system length；Using the side that negative vignetting is arranged
Method ensure that in entire zooming procedure that each zoom position diaphragm bore is consistent, realizes and determines diaphragm bore change F number, has simultaneously
Effect ensure that the uniformity of the image planes relative illumination of each zoom position；It is visible by can be switched built in CCD, cmos device
Light, near infrared filter realize the switching imaging of visible light and near infrared band, guarantee mention round the clock in entire zoom section
For the image of high-resolution；It using general-purpose optical glass material and full spherical design, reduces costs, and optical imagery performance
It is excellent.
Please refer to Fig. 1~3, a kind of visible light near-infrared broadband apochromatism continuous zooming optical camera lens optical path of the present invention
Figure.It moves towards to include that successively the focal power of coaxial setting is positive from the object side to the image side preceding fixed group G1, focal power are negative by optical path
Zoom group G2, the rear fixation that is positive of the compensation group G4 that is negative of the compensation group G3 that is positive of diaphragm, focal power, focal power, focal power
The image planes of group G5 and CCD or CMOS.Zoom group G2 is with compensation group G3, compensation group G4 with certain rule phase during varifocal
To movement, high-resolution is imaged during realizing lens zoom.
Continuous magnification lens as described above meet following relational expression:
0.30≤f1/ft≤0.35
0.55≤f2/f3≤0.60
0.75≤f2/f4≤0.80
Wherein, f1 is the focal length value of preceding fixed group G1；F2 is the focal length value of zoom group G2；F3 is the focal length of compensation group G3
Value；F4 is the focal length value of compensation group G4；Ft is the focal length value of the optical lens most focal length.
Continuous magnification lens as described above, preceding fixed group G1 include positive light coke biconvex lens L11, the double glue of negative power
Close lens L12, positive light coke meniscus lens L13.
Continuous magnification lens as described above, zoom group G2 packet negative power meniscus lens L21, negative power three are glued thoroughly
Mirror L22, negative power biconcave lens L23.
Continuous magnification lens as described above, compensation group G3 include positive light coke cemented doublet L31, the double glue of negative power
Close lens L32, positive light coke biconvex lens L33, negative power meniscus lens L34, positive light coke meniscus lens L35.
Continuous magnification lens as described above, compensation group G4 are negative power biconcave lens L41.
Continuous magnification lens as described above, rear fixed group G5 includes positive light coke meniscus lens L51, positive light coke bent moon
Lens L52.
Continuous magnification lens as described above, the positive light coke biconvex lens L11 of preceding fixed group G1, negative power are double glued
Lens L12, positive light coke meniscus lens L13, positive light coke cemented doublet L31, the positive light coke biconvex lens of compensation group G3
L33 has been all made of low dispersion FK61.
In the present embodiment, the operating spectral range of the optical system be 486nm~900nm, focal length be 10.266mm~
260mm, zoom ratio are 25 times, and relative aperture is 1:3~1:6, and optical length 155mm, field angle is 30.8 °~1.25 °.
Embodiment:
The specific data of the present embodiment are as shown in the table:
Visible light near-infrared broadband apochromatism continuous zooming optical lens design parameter according to claim 1
It is as follows:
Path optics parameter list (unit: mm)
In table, radius of curvature refers to the radius of curvature on each surface, and interval refers to the distance between two adjacent surfaces, and citing comes
It says, the interval of surface S1, i.e. surface S1 to the distance between the S2 of surface.
| Focal length (mm) | D12(mm) | D23(mm) | D34(mm) | D45(mm) |
| 10.266 | 2.5 | 68.7 | 2.66 | 7.87 |
| 100 | 36.5 | 22.16 | 10.5 | 12.57 |
| 260 | 39.8 | 2.5 | 18.32 | 21.11 |
Wherein, distance between fixed group G1, zoom group G2 before D12 is indicated；D23 is indicated between zoom group G2, compensation group G3
Distance；D34 indicates distance between compensation group G3, compensation group G4；D45 indicates distance between compensation group G4, rear fixed group G5.
Claims (8)
1. a kind of visible light near-infrared broadband apochromatism continuous zooming optical camera lens, it is characterised in that including being moved towards by optical path
Zoom group (G2) that preceding fixed group of (G1), the focal power that successively the focal power of coaxial setting is positive from the object side to the image side are negative, light
Rear fixed group (G5) that the compensation group (G4) and focal power that compensation group (G3), the focal power that door screen, focal power are positive are negative are positive；Light
Compensation group (G3), the focal power that zoom group (G2), the focal power that preceding fixed group of (G1), the focal power that focal power is positive are negative are positive be
The focal length of negative compensation group (G4) meets following relational expression:
0.30≤f1/ft≤0.35
0.55≤f2/f3≤0.60
0.75≤f2/f4≤0.80
Wherein, f1 is the focal length value of preceding fixed group (G1) that focal power is positive；F2 is the coke for the zoom group (G2) that focal power is negative
Away from value；F3 is the focal length value for the compensation group (G3) that focal power is positive；F4 is the focal length value for the compensation group (G4) that focal power is negative；ft
It is the focal length value of the optical lens most focal length.
2. visible light near-infrared broadband apochromatism continuous zooming optical camera lens according to claim 1, it is characterised in that:
Rear fixed group (G5) that the focal power the is positive image planes that optical path is CCD or CMOS afterwards.
3. visible light near-infrared broadband apochromatism continuous zooming optical camera lens according to claim 1 or claim 2, feature exist
In: preceding fixed group (G1) that the focal power is positive includes the positive light coke biconvex of the coaxial setting of direction sequence from the object side to the image side
Lens (L11), negative power cemented doublet (L12), positive light coke meniscus lens (L13).
4. visible light near-infrared broadband apochromatism continuous zooming optical camera lens according to claim 1 or claim 2, feature exist
In: the zoom group (G2) that the focal power is negative includes that the negative power bent moon of the coaxial setting of direction sequence from the object side to the image side is saturating
Mirror (L21), three balsaming lens of negative power (L22), negative power biconcave lens (L23).
5. visible light near-infrared broadband apochromatism continuous zooming optical camera lens according to claim 1 or claim 2, feature exist
In: the compensation group (G3) that the focal power is positive includes that the positive light coke of the coaxial setting of direction sequence from the object side to the image side is double glued
Lens (L31), negative power cemented doublet (L32), positive light coke biconvex lens (L33), negative power meniscus lens
(L34), positive light coke meniscus lens (L35).
6. visible light near-infrared broadband apochromatism continuous zooming optical camera lens according to claim 1 or claim 2, feature exist
In: the compensation group (G4) that the focal power is negative is negative power biconcave lens (L41.
7. visible light near-infrared broadband apochromatism continuous zooming optical camera lens according to claim 1 or claim 2, feature exist
In: rear fixed group (G5) that the focal power is positive includes the positive light coke bent moon of the coaxial setting of direction sequence from the object side to the image side
Lens (L51), positive light coke meniscus lens (L52).
8. visible light near-infrared broadband apochromatism continuous zooming optical camera lens according to claim 1 or claim 2, feature exist
In: positive light coke biconvex lens (L11), the negative power cemented doublet of preceding fixed group (G1) that the focal power is positive
(L12), positive light coke meniscus lens (L13), the positive light coke cemented doublet (L31) for the compensation group (G3) that focal power is positive,
Positive light coke biconvex lens (L33) has been all made of low dispersion HFK61.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811315701.9A CN109324402B (en) | 2018-11-07 | 2018-11-07 | Visible light near-infrared broadband apochromatism continuous zooming optical lens |
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| CN201811315701.9A CN109324402B (en) | 2018-11-07 | 2018-11-07 | Visible light near-infrared broadband apochromatism continuous zooming optical lens |
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| CN109324402B CN109324402B (en) | 2020-11-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114355590A (en) * | 2021-12-29 | 2022-04-15 | 福建福光股份有限公司 | Continuous zooming camera lens |
| CN115079379A (en) * | 2022-06-17 | 2022-09-20 | 湖南长步道光学科技有限公司 | Visible-near infrared optical system and optical lens |
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|---|---|---|---|---|
| JP2014182180A (en) * | 2013-03-18 | 2014-09-29 | Canon Inc | Zoom lens, optical system, and image capturing device |
| CN104101991A (en) * | 2013-04-09 | 2014-10-15 | 佳能株式会社 | Zoom lens and image pickup device including the same |
| US20170374291A1 (en) * | 2016-06-27 | 2017-12-28 | Canon Kabushiki Kaisha | Zoom lens and image pickup apparatus including the same |
| CN108132527A (en) * | 2018-02-07 | 2018-06-08 | 嘉兴中润光学科技有限公司 | With the low optical system according to effect of optimization |
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2018
- 2018-11-07 CN CN201811315701.9A patent/CN109324402B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014182180A (en) * | 2013-03-18 | 2014-09-29 | Canon Inc | Zoom lens, optical system, and image capturing device |
| CN104101991A (en) * | 2013-04-09 | 2014-10-15 | 佳能株式会社 | Zoom lens and image pickup device including the same |
| US20170374291A1 (en) * | 2016-06-27 | 2017-12-28 | Canon Kabushiki Kaisha | Zoom lens and image pickup apparatus including the same |
| CN108132527A (en) * | 2018-02-07 | 2018-06-08 | 嘉兴中润光学科技有限公司 | With the low optical system according to effect of optimization |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114355590A (en) * | 2021-12-29 | 2022-04-15 | 福建福光股份有限公司 | Continuous zooming camera lens |
| CN115079379A (en) * | 2022-06-17 | 2022-09-20 | 湖南长步道光学科技有限公司 | Visible-near infrared optical system and optical lens |
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| Publication number | Publication date |
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| CN109324402B (en) | 2020-11-24 |
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