CN104503065B - A kind of big visual field, the ultrahigh resolution ultraviolet spectra imager of little F numbers - Google Patents
A kind of big visual field, the ultrahigh resolution ultraviolet spectra imager of little F numbers Download PDFInfo
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- CN104503065B CN104503065B CN201410821272.8A CN201410821272A CN104503065B CN 104503065 B CN104503065 B CN 104503065B CN 201410821272 A CN201410821272 A CN 201410821272A CN 104503065 B CN104503065 B CN 104503065B
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- lens
- biconvex
- meniscus lens
- meniscus
- little
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- 230000000007 visual effect Effects 0.000 title claims abstract description 18
- 238000002211 ultraviolet spectrum Methods 0.000 title claims abstract description 14
- 230000005499 meniscus Effects 0.000 claims abstract description 27
- 238000003384 imaging method Methods 0.000 claims abstract description 12
- 238000012546 transfer Methods 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 238000001228 spectrum Methods 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 abstract description 5
- 238000012545 processing Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 22
- 230000004075 alteration Effects 0.000 description 11
- 238000013461 design Methods 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 239000005350 fused silica glass Substances 0.000 description 7
- 238000012937 correction Methods 0.000 description 4
- 238000009738 saturating Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 241000700608 Sagitta Species 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
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- 238000009826 distribution Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000000701 chemical imaging Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 239000005331 crown glasses (windows) Substances 0.000 description 1
- 239000005308 flint glass Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000026030 halogenation Effects 0.000 description 1
- 238000005658 halogenation reaction Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- 238000003825 pressing Methods 0.000 description 1
- 210000001747 pupil Anatomy 0.000 description 1
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- 230000009897 systematic effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/14—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation
- G02B13/143—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation for use with ultraviolet radiation
Abstract
A kind of big visual field, the ultrahigh resolution ultraviolet spectra imager of little F numbers belong to technical field of imaging, and which sets gradually the first meniscus lens, the second meniscus lens, the first biconcave lens, aperture diaphragm, the first biconvex lens, the second biconvex lens, biconcave lens, the 3rd biconvex lens and the 3rd meniscus lens；All lens are placed with optical axis, the first meniscus lens, and the second meniscus lens and the first biconcave lens constitute preposition microscope group, realize Polaroid, and convergence plane is located on aperture diaphragm；Microscope group after first biconvex lens, the second biconvex lens, the second biconcave lens, the 3rd biconvex lens and the 3rd meniscus lens composition, ray surface is assembled to aperture diaphragm carries out secondary imaging, and imaging is in image planes.The simple easy processing manufacture of element of the present invention, system bulk are little, and tolerance is good, it is easy to assemble, and image quality is superior, and in the case where nyquist frequency is 100lp/mm, full filed all band modulating transfer function value is better than 0.48, and image deformation is less than 0.5%.
Description
Technical field
The invention belongs to ultraviolet spectra technical field of imaging, is that one kind has superelevation spatial discrimination under certain ultraviolet bandwidth
The big visual field of rate, the optical spectrum imagers optical system of little F numbers.
Background technology
High spatial resolution ultraviolet spectra Image-forming instrument is in multiple research necks such as UV warning technology and ultraviolet atmospheric seeing
Domain has important effect.HIGH RESOLUTION ultraviolet spectra Image-forming instrument can be with low false alarm rate and high spatial coverage etc.
Advantage complete to missile threat it is quick, be accurately positioned, can help improve the pre-alerting ability to closely short distance precision missile；
The gases such as the ozone in air can absorb the ultraviolet light between 200nm～300nm strongly, by the carrying on space loading,
The quasi-instrument can be very good to be analyzed remote sensing to Atmospheric components.But existing ultraviolet spectrometer yet suffers from following
Problem：
1st, transmitting optical material is big in ultraviolet band dispersion, and optional scope is little, and Abbe number is close, and design system aberration is difficult
Eliminate；
2nd, energy transmission and signal to noise ratio have high demands, therefore system F number is little；Require to cover visual field simultaneously greatly, so as to cause axle
Upper aberration is big with off-axis point aberration effects, and image quality is difficult to improve；
3rd, limited by detector and F numbers, system focal is less, high spatial resolution is realized difficult.
The content of the invention
In order to solve problems of the prior art, the invention provides a kind of big visual field, the ultrahigh resolution of little F numbers
Ultraviolet spectra imager, the spectrometer may insure the covering on a large scale of object scene in the range of big visual field, it is ensured that see
Measurement information is not omitted, and the little F numbers of system then may insure the energy and high s/n ratio of system transfers.
The technical proposal for solving the technical problem of the invention is as follows：
A kind of big visual field, the ultrahigh resolution ultraviolet spectra imager of little F numbers, it is saturating that the imager sets gradually the first bent moon
Mirror 1, the second meniscus lens 2, the first biconcave lens 3, aperture diaphragm 4, the first biconvex lens 5, the second biconvex lens 6, concave-concave are saturating
Mirror 7, the 3rd biconvex lens 8 and the 3rd meniscus lens 9；All lens are placed with optical axis, and the first meniscus lens 1, the second bent moon are saturating
Mirror 2 and the first biconcave lens 3 constitute preposition microscope group, and scenery realizes Polaroid convergence to external world, and convergence plane is located at aperture diaphragm
On；First biconvex lens 5, the second biconvex lens 6, the second biconcave lens 7, the 3rd biconvex lens 8 and the 3rd meniscus lens 9 are constituted
Microscope group, carries out secondary imaging to aperture diaphragm convergence ray surface afterwards, and dispersion spectrum imaging is in image planes.
The invention has the beneficial effects as follows：The simple easy processing manufacture of element of the present invention, system bulk are little, system tolerance
It is good, it is easy to assemble, image quality is superior, the modulation of full filed all band can pass in the case where nyquist frequency is 100lp/mm
Delivery function value is better than 0.48, and image deformation is less than 0.5%.
Description of the drawings
A kind of big visual field of Fig. 1 present invention, the structure chart of the ultrahigh resolution ultraviolet spectra imager of little F numbers；
Under a kind of big visual field of Fig. 2 present invention, the ultrahigh resolution ultraviolet spectra imager full filed all band of little F numbers
MTF schemes；
A kind of big visual field of Fig. 3 present invention, the ultrahigh resolution ultraviolet spectra imager curvature of field of little F numbers and distortion figure.
Specific embodiment
With reference to the accompanying drawings and examples the present invention is described in further details.
The invention belongs to spectral imaging technology field, is that one kind can obtain scenery purple on a large scale under certain ultraviolet bandwidth
The imaging spectrography system architecture of outer fine image in different resolution.Part in the structure includes：First meniscus lens 1,
Second meniscus lens 2, the first biconcave lens 3, aperture diaphragm 4, the first biconvex lens 5, the second biconvex lens 6, the second concave-concave are saturating
Mirror 7, the 3rd biconvex lens 8, the 3rd meniscus lens 9 and image planes 10.First meniscus lens 1, the second meniscus lens 2 first and concave-concave
Lens 3 constitute preposition microscope group, and scenery realizes Polaroid convergence to external world, and convergence plane is located on aperture diaphragm；First lenticular
Microscope group after mirror 5, the second biconvex lens 6, the second biconcave lens 7, the second biconvex lens 8 and the composition of the 3rd meniscus lens 9, to aperture
Diaphragm is assembled ray surface and carries out secondary imaging, and gained light spectrum image-forming is located in image planes 10.
In the complete paired systems of analysis of the present invention by the research theoretical to imaging aberration and the distribution of system focal power each
The design of element.
On systematic lectotype, reflective system and refraction-reflection type system are difficult to reach required angle of visual field covering, and reflect
Mirror not easy processing, it is relatively costly, therefore system configuration have selected transmissive system.Available ultraviolet CCD pixels number be 1024 ×
1024, pixel size is 25.6 microns, and under the demand that visual field is 40 °, it is 36mm to be calculated the focal length needed for system, is retained
Certain surplus takes 38mm；The appearance and size of guarantee system is less and in the case of weight is less, and Entry pupil diameters are not more than 12mm, because
This system F number is chosen to be 3.5.
In ultraviolet band application, ultraviolet spectra imaging transmissive system can material selection it is less, have high energy transmission and
Under the requirement of high s/n ratio performance, the selection of ultraviolet lens material is just more limited, and common crown glass and flint glass exist
Ultraviolet permeability is very low, it is contemplated that the physicochemical property and processing characteristics of material, can just only 3～5 kinds of material selection.In order to realize
The distribution of the focal power of system, the material for needing positive lens Abbe number high, the negative lens low material of Abbe number are easy from engineering
Considered with the easy application of property and material, have finally chosen fused quartz and calcirm-fluoride bi-material.
The basic system that invention is adopted is double-gauss lens system, and former double-gauss lens system is by supplementary lens group and rearmounted
Lens group is constituted, and two groups of lens groups are each made up of three spherical lenses respectively, and supplementary lens group has negative power, rearmounted
Microscope group has positive light coke.Invention mainly by carrying out material change, radius of curvature change and number of lenses to two lens groups
Increase redistributed the focal power of system, have modified the higher order aberratons amount and aberration of system, realize the optimization as matter.
As shown in Figure 1, design first from the beginning of the improvement of preposition lens group, in order to meet the requirement of 40 ° of visual fields, by first
The radius of curvature of meniscus lens 1 is increased.In ultraviolet band, lens material is often used without gluing method, especially with high property
In the system that energy index Design is required, ultraviolet optics glue can affect the design objective of system, it is therefore desirable to by preposition microscope group
Two panels gluing mirror is taken apart afterwards；Optional UV materials are fused quartz and calcirm-fluoride, and the Abbe number of bi-material is more close, therefore is
Ensure Polaroid at aperture diaphragm, this two panels lens needs to pull open a certain distance；Meanwhile, calcirm-fluoride has halogenation
The easy deliquescence and the characteristic of vulnerable to pollution of thing, therefore the first meniscus lens 1 can not use calcirm-fluoride, here by the first meniscus lens
1 material elects fused quartz as, and 2 material of the second meniscus lens is calcirm-fluoride, and 3 material of the first biconcave lens is fused quartz, this material
It is advantageously selected for the correction of the senior amount of aberration.
The rearmounted microscope group of double-gauss lens system is typical three-chip type, in order to the dominant aberration eliminated the effects of the act as matter includes
The curvature of field, spherical aberration and ratio chromatism, etc., need to increase eyeglass to redistribute focal power.Due to adding mirror from diaphragm distal end
Piece conversion correction of the glass to ratio chromatism, is more sensitive, it is contemplated that pressing close to increase eyeglass at diaphragm, due to front end microscope group
Last a piece of first biconcave lens 3 have selected fused quartz, therefore increased 5 material selection of the first biconvex lens calcirm-fluoride with
Positive-negative relationship before and after satisfaction between lens；For the senior amount of further aberration correction, it usually needs the interval organized before and after increase is come
The drift angle organized after reduction, widens the volume brought at interval increase to reduce in invention, first pair for can increasing in rearmounted microscope group
The second biconvex lens 6 is further added by after convex lens 5, material equally selects calcirm-fluoride, this reduces the senior aberration amount of system,
Ensure that the further correction of spherical aberration.In rearmounted lens group 7 material of the second biconcave lens be fused quartz, 8 material of the 3rd biconvex lens
Expect for calcirm-fluoride, last a piece of 3rd meniscus lens 9 has carried out the improvement of form in former double-gauss lens system, changes which
The radius of curvature direction of transmission plane, material are selected as fused quartz.
Fig. 2 gives the full filed all band modulating transfer function value figure of design system.The functional value is comprehensively reflected
The design evaluatio result of system.Have selected 10 ° of half field-of-views, 14 ° of half field-of-views and 20 ° of half field-of-views to carry out trace in figure.It is wherein real
Line represents meridian direction modulating transfer function value, and dotted line represents sagitta of arc direction transfer function values.Can see, with the increasing of visual field
Greatly, modulating transfer function value is being gradually reduced.Wherein peripheral field is nyquist frequency of 20 ° of half field-of-views in 100lp/mm
It is better than 0.48 under (the spatial frequency week/mm i.e. in figure), design system realizes extraordinary imaging in full filed all band
Quality.
Fig. 3 gives the curvature of field and distortion figure of design system, and centre wavelength and two edge wave length are have selected in figure to be carried out
Analysis.Dotted line represents the meridian direction of the curvature of field, and solid line represents the sagitta of arc direction of the curvature of field.In the curvature of field shows, the maximum curvature of field is produced
Wavelength be edge wavelength 280nm, defocusing amount is about 0.056mm；And in distortion shows, the maximum distortion of system is less than
0.5%, these Confirmation Of Number systems have reached good distortion and curvature of field design control result.
Claims (2)
1. the ultrahigh resolution ultraviolet spectra imager of a kind of big visual field, little F numbers, it is characterised in that the imager sets gradually
First meniscus lens (1), the second meniscus lens (2), the first biconcave lens (3), aperture diaphragm (4), the first biconvex lens (5),
Second biconvex lens (6), the second biconcave lens (7), the 3rd biconvex lens (8) and the 3rd meniscus lens (9)；All lens are shared the same light
Axle is placed, the first meniscus lens (1), and the second meniscus lens (2) and the first biconcave lens (3) constitute preposition microscope group, to external world scape
Thing realizes Polaroid convergence, and convergence plane is located on aperture diaphragm；First biconvex lens (5), the second biconvex lens (6), second
Microscope group after biconcave lens (7), the 3rd biconvex lens (8) and the 3rd meniscus lens (9) composition, assembles ray surface to aperture diaphragm and enters
Row secondary imaging, gained light spectrum image-forming are located in image planes (10).
2. as claimed in claim 1 a kind of big visual field, the ultrahigh resolution ultraviolet spectra imager of little F numbers, it is characterised in that
The service band of the imager is 240nm～280nm, and complete 40 ° of visual field of observation, system focal are 38mm, and F numbers are 3.5, are regarded entirely
Field all band modulating transfer function value can reach more than 0.48 under the nyquist frequency of 100lp/mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410821272.8A CN104503065B (en) | 2014-12-25 | 2014-12-25 | A kind of big visual field, the ultrahigh resolution ultraviolet spectra imager of little F numbers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410821272.8A CN104503065B (en) | 2014-12-25 | 2014-12-25 | A kind of big visual field, the ultrahigh resolution ultraviolet spectra imager of little F numbers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104503065A CN104503065A (en) | 2015-04-08 |
| CN104503065B true CN104503065B (en) | 2017-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410821272.8A Expired - Fee Related CN104503065B (en) | 2014-12-25 | 2014-12-25 | A kind of big visual field, the ultrahigh resolution ultraviolet spectra imager of little F numbers |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188651B (en) * | 2018-09-28 | 2023-10-20 | 长春长光瑞实科技有限公司 | Refractive high-resolution star sensor optical system |
| CN110941086B (en) * | 2019-12-19 | 2021-12-28 | 福建福光股份有限公司 | Ultra-short low-distortion shimmer imaging optical system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3832037A (en) * | 1971-12-08 | 1974-08-27 | Olympus Optical Co | Super wide-angle lens systems |
| US3975091A (en) * | 1974-04-25 | 1976-08-17 | Asahi Kogaku Kogyo Kabushiki Kaisha | Wide angle photographic lens |
| CN1164033A (en) * | 1996-03-29 | 1997-11-05 | 三星航空产业株式会社 | Wide-angle photographic lens system |
| CN1920608A (en) * | 2006-09-11 | 2007-02-28 | 中国科学院上海技术物理研究所 | Ultraviolet object lens in aperture wide wave range for ultraviolet detection |
| KR20100124641A (en) * | 2009-05-19 | 2010-11-29 | 주식회사 나노포토닉스 | Fisheye lens |
-
2014
- 2014-12-25 CN CN201410821272.8A patent/CN104503065B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3832037A (en) * | 1971-12-08 | 1974-08-27 | Olympus Optical Co | Super wide-angle lens systems |
| US3975091A (en) * | 1974-04-25 | 1976-08-17 | Asahi Kogaku Kogyo Kabushiki Kaisha | Wide angle photographic lens |
| CN1164033A (en) * | 1996-03-29 | 1997-11-05 | 三星航空产业株式会社 | Wide-angle photographic lens system |
| CN1920608A (en) * | 2006-09-11 | 2007-02-28 | 中国科学院上海技术物理研究所 | Ultraviolet object lens in aperture wide wave range for ultraviolet detection |
| KR20100124641A (en) * | 2009-05-19 | 2010-11-29 | 주식회사 나노포토닉스 | Fisheye lens |
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| CN104503065A (en) | 2015-04-08 |
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Granted publication date: 20170405 Termination date: 20191225 |