CN205809394U - Short-wave infrared broadband apochromatism image space telecentricity telephotolens - Google Patents
Short-wave infrared broadband apochromatism image space telecentricity telephotolens Download PDFInfo
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- CN205809394U CN205809394U CN201620705579.6U CN201620705579U CN205809394U CN 205809394 U CN205809394 U CN 205809394U CN 201620705579 U CN201620705579 U CN 201620705579U CN 205809394 U CN205809394 U CN 205809394U
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- telephotolens
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Abstract
The utility model discloses a kind of short-wave infrared broadband apochromatism image space telecentricity telephotolens.It is coaxial transmission type optical system, service band is 1.0～2.5 μm, including eight pieces of spherical lenss, along light direction, it is followed successively by three pieces of positive meniscus lens, one piece of diverging meniscus lens, one piece of double-concave negative lens, one piece of positive meniscus lens and two pieces of biconvex positive lens, diaphragm is between the 4th piece and the 5th piece of lens, and the first seven block lens all bends towards diaphragm, and the 8th piece of lens make image space chief ray be parallel to optical axis to impinge perpendicularly in image planes.This utility model is suitable for wide waveband, compact conformation, spherical aberration are little, second order spectrum is little, spherochromatism and chromatic variation of distortion much smaller than a pixel, illuminance of image plane is uniformly, image space telecentricity, image quality be close to diffraction limit, processing and low cost of manufacture；Capacity usage ratio is high, light harvesting ability is strong, hot adaptability good, debug detection easily.It can be applicable to the military and civilian fields such as space remote sensing, machine vision, agricultural detection.
Description
Technical field
This utility model relates to a kind of short-wave infrared broadband apochromatism image space telecentricity telephotolens, can be applicable to night
Depending on, reconnaissance and surveillance, space remote sensing, machine vision, the field such as agricultural monitoring.
Background technology
Short-wave infrared refer to wave band at 1 μm～the infrared band of 2.5 μm, it can provide visible ray, lll night vision, in
The information that ripple, LONG WAVE INFRARED are not provided that so that details presents more prominent.The most generally there is short-wave infrared spoke in all objects
Penetrate.In application aspect, short-wave infrared telephotolens in addition to for military fields such as night vision, reconnaissance and surveillance, space remote sensings,
Can be additionally used in the field such as Non-Destructive Testing, industry multispectral imaging analysis, resources remote sensing, infrared astronomy, traffic, medical treatment, public security.
Such as, resources remote sensing refers to detect earth mineral resources by imaging spectrometer, and monitoring soil, vegetation water content and air become
Point change, Crop Estimation and preventing and reducing natural disasters, and the preposition telephotolens of short-wave infrared is the eyes of whole imaging spectrometer, uses
In being mounted in the spectral information and spatial information obtaining ground target on all kinds of platform.
Along with the development of short-wave infrared detector, the most increasing to the demand of telephotolens.Tradition short-wave infrared object lens
Being often catoptric arrangement, advantage is not have aberration, and shortcoming is that coaxial configuration visual field typically will not be very big, and there is central obscuration, from
Axle construction adds processing and resetting difficulty, uses aspheric surface more, relatively costly；And transmission-type structure is typically easier to be designed as together
Axle, beneficially processing are debug, and have that total length, volume be little, the advantage of compact conformation, and common problem is the increasing along with wave band
Greatly, after aberration correction, residual achromatic aberration also will become big, and common optical glass material mostly can not be complete at short infrared wave band
Total transmissivity, dispersion characteristics are poor, and the most how broadband transmission-type object lens being carried out apochromatism is a problem demanding prompt solution.
Additionally, for the luminous flux improving detectable target zone with receive, also need to increase the angle of visual field and the relative aperture of object lens,
So as the more target inband energy of disposable collecting and increase areas imaging.In order to illuminance of image plane is uniform, object lens needs possess
Telecentric structure.And there is above-mentioned described many deficiencies in existing short-wave infrared telephotolens and relatively costly, inapplicable
In current short-wave infrared detector.
Summary of the invention
The deficiency that this utility model exists for prior art, it is provided that a kind of compact conformation, image quality is high, stability
Good, it is beneficial to processing and debugs, and work in the broadband apochromatism image space telecentric system of short infrared wave band.
For reaching above-mentioned purpose, the technical solution of the utility model is to provide a kind of short-wave infrared broadband apochromatism picture
Fang Yuanxin telephotolens, it is transmission type optical system, and the structure of its optical system is coaxial configuration, and whole lens are sphere
Face type；Along light direction, be followed successively by first positive meniscus lens, second positive meniscus lens, the 3rd positive meniscus lens,
Diverging meniscus lens, aperture diaphragm, double-concave negative lens, the 4th positive meniscus lens, first biconvex positive lens and second biconvex
Plus lens；Aperture diaphragm is between diverging meniscus lens and double-concave negative lens；From first positive meniscus lens to first biconvex
Each lens in plus lens, all bend towards aperture diaphragm, and second biconvex positive lens assembles light；Image space chief ray is parallel to optical axis
And impinge perpendicularly in image planes；Along light direction, the focal length of described each lens be corresponding in turn to intof 1、f 2、f 3、f 4、f 6、f 7、f 8、 f 9, they relative telephotolens focal lengthsfNormalized value correspond to 2.0 respectively≤f’ 1≤ 3.0,9.5≤f’ 2≤ 11.0,4.0≤f’ 3≤ 5.0 ,-0.80≤f’ 4≤-0.20 ,-2.0≤f’ 6≤-1.0,0.5≤f’ 7≤
2.0,1.0≤f’ 8≤ 2.0,1.5≤f’ 9≤3.0。
Along light direction, the refractive index of each lens be corresponding in turn to inton 1、n 2、n 3、n 4、n 6、n 7、n 8Withn 9,
Corresponding span is respectively 1.8≤n 1≤2.6、1.3≤n 2≤1.8、1.3≤n 3≤1.8、1.8≤n 4≤
2.6、1.3≤n 6≤1.8、1.3≤n 7≤1.8、1.3≤n 8≤1.8、1.3≤n 9≤1.8。
Each lens of telephotolens are installed in a barrel, and the length of barrel is less than 32mm.Telephotolens is
The big angle of visual field is 45 °；Maximum relative aperture is F/2.6；Maximum caliber is less than 15mm, and its second order spectrum is less than 10 μm.
Compared with prior art, advantage of the present utility model is:
1, telephotolens service band is short infrared wave band, service band width, and second order spectrum is less than 10 μm, spherical aberration, color
Spherical aberration is much smaller than a pixel, and chromatic variation of distortion is much smaller than 1/10th pixels, and image quality is close to diffraction limit.
2, quartz, BaF are only chosen2, tri-kinds of optical glass materials of ZnSe, solving common material mostly can not be red at shortwave
The contradiction that outer wave band is wholly transmissive；And by the reasonable distribution of focal power, overcome broadband transmission-type object lens second order spectrum difficult
With the problem eliminated.
3, diaphragm is positioned on rear group of lens front focal plane, makes telephotolens have the characteristic of image space telecentricity, it is ensured that image planes are shone
Degree uniformly, relative aperture is 1/2.6 to the maximum, the angle of visual field up to 45 °, improve the light collecting light ability of object lens, increase imaging model
Enclosing, disposable collecting has arrived more target information.
4, all use spherical surface type, do not use aspheric surface or other face type, greatly reduce processing and manufacturing cost, inspection
Surveying difficulty, debug easily, and overall length is less than 32mm, volume is little, compact conformation.
Accompanying drawing explanation
The light of the short-wave infrared broadband apochromatism image space telecentricity telephotolens that Fig. 1 provides for this utility model embodiment
Lu Tu；
The tune of the short-wave infrared broadband apochromatism image space telecentricity telephotolens that Fig. 2 provides for this utility model embodiment
Modulation trnasfer function curve chart；
The point of the short-wave infrared broadband apochromatism image space telecentricity telephotolens that Fig. 3 provides for this utility model embodiment
Row figure；
The axle of the short-wave infrared broadband apochromatism image space telecentricity telephotolens that Fig. 4 provides for this utility model embodiment
To aberration curve figure；
The phase of the short-wave infrared broadband apochromatism image space telecentricity telephotolens that Fig. 5 provides for this utility model embodiment
Compare line chart of writing music；
In Fig. 1: 1, the first positive meniscus lens of telephotolens, 2, second positive meniscus lens, the 3, the 3rd positive bent moon
Lens, 4, first diverging meniscus lens, 5, diaphragm, 6, second diverging meniscus lens, the 7, the 4th positive meniscus lens, 8, first
Biconvex lens, 9, second biconvex lens, 10, image planes.
Detailed description of the invention
With embodiment, technical solutions of the utility model are further specifically described below in conjunction with the accompanying drawings.
Embodiment 1
A kind of short-wave infrared broadband apochromatism image space telecentricity telephotolens of this offer of the present embodiment, object lens work in short
Ripple infrared band 1.0 μm 2.5 μm, focal length be 10mm, F/# be 2.8, full filed is 40 °.
Seeing accompanying drawing 1, it is the index path of the optical lens that the present embodiment is provided, and it is transmission type optical system, its
The structure of optical system is coaxial configuration, includes eight pieces of spherical lenss altogether, along light direction, is followed successively by the positive bent moon of first
1, second positive meniscus lens 2 of lens, the 3rd positive meniscus lens 3, diverging meniscus lens 4, aperture diaphragm 5, double-concave negative lens 6,
4th positive meniscus lens 7, first biconvex positive lens 8 and second biconvex positive lens 9；It is saturating that aperture diaphragm 5 is positioned at negative bent moon
Between mirror 4 and double-concave negative lens 6；Each lens from first positive meniscus lens 1 to first biconvex positive lens 8, all bend towards
Aperture diaphragm 5, second biconvex positive lens 9 is assembled light, is made image space chief ray be parallel to optical axis and incide image planes, i.e. have picture
The feature of Fang Yuanxin.Along light direction, the focal length of each lens be corresponding in turn to intof 1、f 2、f 3、f 4、f 6、f 7、f 8、 f 9, they relative telephotolens focal lengthsfNormalized value correspond to 2.0 respectively≤f’ 1≤ 3.0,9.5≤f’ 2≤ 11.0,
4.0≤f’ 3≤ 5.0 ,-0.80≤f’ 4≤-0.20 ,-2.0≤f’ 6≤-1.0,0.5≤f’ 7≤ 2.0,1.0≤f’ 8 ≤
2.0,1.5≤f’ 9≤3.0.The refractive index of each lens be corresponding in turn to inton 1、n 2、n 3、n 4、n 6、n 7、n 8Withn 9, corresponding
Span is respectively 1.8≤n 1≤2.6、1.3≤n 2≤1.8、1.3≤n 3≤1.8、1.8≤n 4≤2.6、1.3≤n 6
≤1.8、1.3≤n 7≤1.8、1.3≤n 8≤1.8、1.3≤n 9≤1.8。
In conjunction with third-order aberration theory, three kinds of optical glass materials that transmitance is higher, the object lens secondary light obtained are selected
Composing little, image quality is high.Diaphragm is placed on rear group of lens front focal plane, makes telephotolens have a characteristic of image space telecentricity, i.e. as
Side's light impinges perpendicularly in image planes, it is ensured that illuminance of image plane is uniform.Last block lens rear surface of telephotolens is stayed with image planes
There are enough spaces, are used for placing detector.Lens all use spherical surface type, reduce processing and manufacturing cost, detection difficulty
Degree, and be prone to debug.
For the short-wave infrared broadband apochromatism image space each lens of telecentricity telephotolens, the present embodiment provides one preferably
Scheme, concrete data and the material used see table 1.
Table 1:
。
Being installed in a barrel by each lens of telephotolens, the length of barrel is less than 32mm；Telephotolens is
Heavy caliber is less than 15mm.
Seeing accompanying drawing 2, it is the modulation transfer function (MTF) curve of the present embodiment optical system, detector Pixel size
Being 24 μ m 24 μm, at nyquist frequency 21lp/mm, the MTF of system is more than 0.85, and image quality is close to diffraction limit.
Seeing accompanying drawing 3, it is the point range figure in the ray tracing image plane of the present embodiment optical system, the circle representative in figure
System diffraction Airy disk.In the range of each visual field point range figure energy all concentrates on Airy disk, there is good image quality.
Seeing accompanying drawing 4, it is the axial aberration curve chart of the present embodiment optical system, and spherical aberration is less than 1 um, and spherochromatism is little
In 0.8um, much smaller than 1 pixel, second order spectrum is less than 10 μm, less than depth of focus.
Seeing accompanying drawing 5, it is the relative illumination curve chart of the present embodiment optical system, it is seen that image planes relative illumination is uniform,
The angle value that contrasts of peripheral field is more than 0.96.
The optical system structure that the present embodiment provides is compact, and volume is little, total length, manages with apochromatism according to third-order aberration
Opinion, is used the form that positive and negative focal power separates, only selects 3 kinds of optical glass materials, designed by optimization, the thing of looking in the distance obtained
Mirror has image space telecentricity characteristic, and image quality is close to diffraction limit.
Claims (8)
1. a short-wave infrared broadband apochromatism image space telecentricity telephotolens, it is characterised in that: it is transmitted light system
System, the structure of its optical system is coaxial configuration, and whole lens are spherical surface type；Along light direction, it is followed successively by first
Sheet positive meniscus lens (1), second positive meniscus lens (2), the 3rd positive meniscus lens (3), diverging meniscus lens (4), aperture light
Door screen (5), double-concave negative lens (6), the 4th positive meniscus lens (7), first biconvex positive lens (8) and second biconvex positive lens
(9)；Aperture diaphragm (5) is positioned between diverging meniscus lens (4) and double-concave negative lens (6)；From first positive meniscus lens (1) to
Each lens in a piece of biconvex positive lens (8), all bend towards aperture diaphragm (5), and second biconvex positive lens (9) assembles light；Picture
Side's chief ray is parallel to optical axis and impinges perpendicularly in image planes；Along light direction, the focal length of described each lens is corresponding in turn to
Forf 1、f 2、f 3、f 4、f 6、f 7、f 8、 f 9, they relative telephotolens focal lengthsfNormalized value correspond to respectively
2.0≤f’ 1≤ 3.0,9.5≤f’ 2≤ 11.0,4.0≤f’ 3≤ 5.0 ,-0.80≤f’ 4≤-0.20 ,-2.0≤f’ 6≤-1.0,0.5≤f’ 7≤ 2.0,1.0≤f’ 8≤ 2.0,1.5≤f’ 9≤3.0。
A kind of short-wave infrared broadband apochromatism image space telecentricity telephotolens the most according to claim 1, its feature exists
In: along light direction, the refractive index of each lens be corresponding in turn to inton 1、n 2、n 3、n 4、n 6、n 7、n 8Withn 9, corresponding takes
Value scope is respectively 1.8≤n 1≤2.6、1.3≤n 2≤1.8、1.3≤n 3≤1.8、1.8≤n 4≤2.6、1.3≤n 6≤1.8、1.3≤n 7≤1.8、1.3≤n 8≤1.8、1.3≤n 9≤1.8。
A kind of short-wave infrared broadband apochromatism image space telecentricity telephotolens the most according to claim 1, its feature exists
In: each lens of telephotolens are installed in a barrel, and the length of barrel is less than 32mm.
Short-wave infrared broadband apochromatism image space telecentricity telephotolens the most according to claim 1, it is characterised in that institute
The maximum field of view angle stating telephotolens is 45 °.
Short-wave infrared broadband apochromatism image space telecentricity telephotolens the most according to claim 1, it is characterised in that: institute
The maximum relative aperture stating telephotolens is F/2.6.
Short-wave infrared broadband apochromatism image space telecentricity telephotolens the most according to claim 1, it is characterised in that: institute
State telephotolens maximum caliber less than 15mm.
Short-wave infrared broadband apochromatism image space telecentricity telephotolens the most according to claim 1, it is characterised in that: institute
State telephotolens second order spectrum less than 10 μm.
Short-wave infrared broadband apochromatism image space telecentricity telephotolens the most according to claim 1, it is characterised in that: institute
State telephotolens and be operated in short infrared wave band 1.0～2.5 μm.
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| CN201620705579.6U CN205809394U (en) | 2016-07-06 | 2016-07-06 | Short-wave infrared broadband apochromatism image space telecentricity telephotolens |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911672A (en) * | 2016-07-06 | 2016-08-31 | 苏州大学 | Short-wave infrared wide-band apochromatism image space telecentric teleobjective |
| CN109031620A (en) * | 2018-08-30 | 2018-12-18 | 浙江舜宇光学有限公司 | Optical imagery eyeglass group |
| CN109683295A (en) * | 2018-12-28 | 2019-04-26 | 中国科学院长春光学精密机械与物理研究所 | A kind of focal length short-wave infrared optical lens and the electronic equipment using it |
| CN114935813A (en) * | 2022-06-01 | 2022-08-23 | 苏州东方克洛托光电技术有限公司 | Visible near-infrared compact image space telecentric optical system |
-
2016
- 2016-07-06 CN CN201620705579.6U patent/CN205809394U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911672A (en) * | 2016-07-06 | 2016-08-31 | 苏州大学 | Short-wave infrared wide-band apochromatism image space telecentric teleobjective |
| CN105911672B (en) * | 2016-07-06 | 2018-06-19 | 苏州大学 | Short-wave infrared broadband apochromatism image space telecentricity telephotolens |
| CN109031620A (en) * | 2018-08-30 | 2018-12-18 | 浙江舜宇光学有限公司 | Optical imagery eyeglass group |
| WO2020042799A1 (en) * | 2018-08-30 | 2020-03-05 | 浙江舜宇光学有限公司 | Optical imaging lens set |
| CN109031620B (en) * | 2018-08-30 | 2020-10-02 | 浙江舜宇光学有限公司 | Optical imaging lens group |
| CN109683295A (en) * | 2018-12-28 | 2019-04-26 | 中国科学院长春光学精密机械与物理研究所 | A kind of focal length short-wave infrared optical lens and the electronic equipment using it |
| CN109683295B (en) * | 2018-12-28 | 2021-06-15 | 中国科学院长春光学精密机械与物理研究所 | Long-focus short-wave infrared optical lens and electronic equipment applying same |
| CN114935813A (en) * | 2022-06-01 | 2022-08-23 | 苏州东方克洛托光电技术有限公司 | Visible near-infrared compact image space telecentric optical system |
| CN114935813B (en) * | 2022-06-01 | 2024-04-26 | 苏州东方克洛托光电技术有限公司 | Visible near infrared compact image space telecentric optical system |
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Granted publication date: 20161214 Effective date of abandoning: 20180619 |
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| AV01 | Patent right actively abandoned |
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| AV01 | Patent right actively abandoned |