CN105223679B - The common light path double-view field athermal optical imaging system of object lens of large relative aperture near-infrared - Google Patents
The common light path double-view field athermal optical imaging system of object lens of large relative aperture near-infrared Download PDFInfo
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- CN105223679B CN105223679B CN201510674304.0A CN201510674304A CN105223679B CN 105223679 B CN105223679 B CN 105223679B CN 201510674304 A CN201510674304 A CN 201510674304A CN 105223679 B CN105223679 B CN 105223679B
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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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
Abstract
A kind of common light path double-view field athermal optical imaging system of object lens of large relative aperture near-infrared proposed by the present invention, preceding fixed microscope group by arranged after object plane connect firmly three positive and negative, positive lens groups into, fix afterwards microscope group successively by five it is positive and negative, just, positive and negative lens constitute, preceding fixed microscope group, rear fixed microscope group are maintained static in zooming procedure；Middle zoom microscope group by negative, positive lens gluing the first balsaming lens group and the 3rd negative lens group into；Zoom microscope group is driven using connecting firmly the motor on lens barrel as driving source by gear-guide rail mechanism, realizes two grades of double-view field zooms along optical axis direction is movable, and collectively form optical imaging system with preceding fixed microscope group and rear fixed microscope group., using optics by athermal technology, in two grades of double vision interfield cuts, system overall length is constant for the present invention, and when to same Scenery Imaging, all has preferable image quality without focusing in 40 DEG C~60 DEG C temperature ranges.
Description
Technical field
The present invention relates to a kind of athermal double-view field optical imaging system for being mainly used near infrared band.Specifically,
The present invention relates to a kind of use double-view field zoom and with the near-infrared spectroscopy system of PASSIVE OPTICAL athermal function.
Background technology
Near-infrared spectroscopy system can reappear most of details of visible images, and with preferable lll night vision
Ability, cloud and mist and smog penetration capacity, have farther operating distance compared to visible optical detection, and system is imaged as future optical
One developing direction of system.It is inexpensive near-infrared and common optical glass material has transmitance high near infrared band
The application of optical imaging system is provided a great convenience, and common optical glass material is in the temperature refraction rate of near infrared band
Coefficient very little, the influence of the change of environment temperature to near-infrared spectroscopy systematic function is mainly manifested in by lens material and company
Hot defocus caused by lens surface curvature radius, the change being spaced between thickness and lens caused by the thermal expansion of fitting.But more
In severe applied environment, it is desirable to the image quality that optical imaging system has had in -40 DEG C~+60 DEG C temperature ranges, temperature
Degree range spans are larger, must now be taken in by hot defocus caused by the thermal expansion of lens material and connector, therefore greatly
Influence of the temperature change of scope to near-infrared spectroscopy system be can not ignore.
The Near-infrared Double visual field for using in the prior art is mainly designed to transmissive system, wherein including path-splitting together again
Two kinds of ways of realization of light path.Path-splitting double-view field optical imaging system can be realized by two methods of point focal plane or confocal face,
It is divided to the design of focal plane to make use of that two different optical imaging systems detector focal plane different from two is integrated to be realized, quite
In two optical imaging systems, design is simple, but whole system volume is big, high cost, and two optical imaging systems is same
Axle it is difficult to ensure that；The design for being divided to focal plane is then that two light of visual field of size are converged at into same focal plane by beam splitter,
Realize that double-view field switches by way of mechanically or electrically learning, integrated level is uprised, but as a result of beam splitter, system still has
There is larger volume, and double-view field adjusts coaxial more difficult.Light path double-view field optical imaging system mainly passes through lens unit altogether
Axial movement cut out two ways with incision and realized, both make use of image to exchange principle, the former is by movement
Certain set of pieces in optical imaging system light path, realizes that double-view field switches, and with volume compact, the advantages of integrated level is high, but becomes
Times scope is smaller；The latter realizes that double-view field switches by the way that certain set of pieces is moved in and out into light path, and volume is larger, but can realize more
Big zoom ratio.
China Patent Publication No. CN102890335A discloses a kind of double-view field championship and demarcates digital camera lens optical imagery system
System, using the design type of common light path axial displacement, by moving axially zoom microscope group constituent element, realizes 70/200mm and approaches
3 times of zoom ratio, with larger back work distance, and F numbers, up to 1.5, system design wave band is visible light wave range, but is operable with
Night low-illumination condition, shows that the design can work near infrared band, but used altogether in 10 lens materials of the system
9 kinds of common optical glass materials, material category is more, and the combination of materials achromatism is limited in one's ability, it is difficult to be applied to wider
Wavelength band.In addition, the system and the unrealized design without thermalization.
China Patent Publication No. CN103676151A discloses a kind of Near-infrared Double field optical imaging system, and the system is adopted
Realize that double-view field is imaged with the design type of path-splitting point focal plane.The system service band is 700nm~1100nm, is used altogether
14 kinds of optical elements, 6 kinds of glass materials, focal length focal length are 61mm, and short focus focal length is 21mm, is realized to being using electronic aperture
The control of system F numbers, with preferable image quality.But the design of the system path-splitting point focal plane makes whole optical imaging system collection
Low into spending, dress school is complicated, is unfavorable for engineering application, and the optical imaging system does not have passive athermal function.
The content of the invention
The purpose of the present invention is directed to the weak point that above-mentioned prior art is present, there is provided one kind has object lens of large relative aperture,
And double-view field zoom can be realized, and can automatically adapt to the near-infrared spectroscopy system of variation of ambient temperature.
To achieve these goals, the common light path athermal optical imagery system in a kind of Near-infrared Double visual field that the present invention is provided
System, including：Preceding fixed microscope group 4, zoom microscope group 3 and the rear fixed microscope group 2 for connecting firmly, its feature are arranged in order from object plane 5 to focal plane 1
It is：Fixed microscope group 4 is by arranging the first positive lens 401 for connecting firmly and the first negative lens 402 and second just before described after object plane
Lens 403 are constituted, and microscope group 2 is fixed afterwards successively by the 3rd positive lens 201, the 4th negative lens 202 and the 4th positive lens 203, second
Glued microscope group, the 5th positive lens 204 and the 5th negative lens 205 are constituted, and preceding fixed microscope group 4, rear fixed microscope group 2 are in zooming procedure
Maintain static；Middle zoom microscope group 3 has negative power, and first is formed by the second negative lens 301 and the gluing of the 3rd positive lens 302
Balsaming lens group and the 3rd negative lens 303 are constituted, wherein, preceding fixed microscope group 4 is successively using heavy-lanthanide flint glass HZLAF68B, weight
Tri- lens material combinations of pairs of flint glass HZF88 and fluorine crown glass HFK61, fix microscope group 2 and use fluorine crown board successively afterwards
Glass HFK61, dense flint glass HZF88, heavy-lanthanide flint glass HZLAF68B, heavy-lanthanide flint glass HZLAF68B, dense flint glass
Five lens material combinations of pairs of glass HZF88；At short focus position long, stop position keeps constant, is fixed on the 4th positive lens
201 near object plane side；Zoom microscope group 3 is successively by lanthanum flint glass HLAF3B, dense flint glass HZF88 and dense barium flint
Tri- lens material compositions of HZBAF50, to connect firmly the motor on lens barrel as driving source, are driven by gear-guide rail mechanism
It is dynamic, two grades of double-view field zooms are realized along optical axis direction is movable, when to focal length direction change, zoom microscope group 3 is towards focal plane 1
One lateral movement, when changing to short focus, zoom microscope group 3 towards the side of object plane 5 linear motion realize that visual field switches in time, and with it is preceding
Fixed microscope group 4 and rear fixed microscope group 2 collectively form complete optical imaging system.
The present invention has the advantages that compared to prior art.
The present invention is based on PASSIVE OPTICAL athermal principle, near infrared band (0.9 μm~1.7 μm), is exchanged using image
The double-view field zoom mode of principle, in -40 DEG C~60 DEG C range of temperature, focal length can switch change from 50mm to 150mm.
Within the temperature range of -40 DEG C~60 DEG C, at the position of 50mm and 150mm focal lengths, to same Scenery Imaging, without focusing,
The modulation transfer function of all visual fields of focal length can keep cut-off frequency be 34lp/mm when more than 0.6.By having
The zoom microscope group 3 of negative power, moves forward and backward on optical axis all the time during visual field is become, and aperture F numbers are constant during zoom, overall length
Immobilize, barycenter change is smaller, and system bulk is small, compact conformation, and zoom mode is simple.
The optical glass material that system of the present invention is used all can be by other the correspondence trade mark or refractive index dispersion properties phases
Near optical glass or other special materials are replaced, now only need to be to the radius of curvature of each eyeglass, thickness, mirror in this optical texture
Modify at piece interval etc., you can the optical property close or more excellent with the present invention is obtained under high/low temperature.Wherein, fluorine crown
Board glass HFK61 can be replaced by FCD1 or S-FPL51 or N-PK52A；Lanthanum flint glass HLAF3B can by LAF2 or S-LAM2 or
N-LAF2 replaces；Dense flint glass HZF88 can be replaced by FDS18；Dense barium flint HZBAF50 can be by BACED5 or S-
BAM25 or N-SSK5 replaces；Heavy-lanthanide flint glass HZLAF68B can be replaced by TAFD30 or S-LAH55 or N-LASF31.This hair
The optical glass material that the bright system is used also can be by other the correspondence trade mark or the close optical glass of refractive index dispersion properties
Or other special materials are replaced.
It is 236 × 10 that lens barrel material of the present invention uses linear expansion coefficient-7The aluminum alloy materials of/K, you can ensure optical imagery
Image quality of the system within the temperature range of -40 DEG C~60 DEG C.Certainly, the design can also be using other thermal coefficient of expansions more
Low or higher lens barrel material, is modified, then using this optical texture to the radius of curvature of eyeglass, thickness and eyeglass interval etc.
The optical property close or more excellent with the present invention can be obtained under high/low temperature.Simultaneously as the present invention use only 11
Lens, whole optical imaging system has preferable tolerance characteristic.
The present invention is combined and -40 DEG C~60 DEG C total temperatures using the lens material matched with lens barrel linear expansion coefficient
In the range of PASSIVE OPTICAL compensation athermal mode, compensate for because lens barrel material temperature change caused by expand with heat and contract with cold caused by
Defocus.
By bending method of the critical surfaces with broadband antireflective film is coated with, involved optical imaging system exists the present invention
Each visual field all has preferable ghost image rejection characteristic.Ghost image is one kind of veiling glare, is the light by the real image that comes true in worksheet
Face produces the picture in image planes by even-numbered reflections.For image optics imaging system, ghost image can increase the noise in image planes, drop
The contrast of low image planes and the optical transfer function of optical imaging system.
Optical imaging system of the present invention has larger back work distance from (back work distance is fixed mirror after optical imaging system
Group is near focal plane side finally simultaneously to the distance of focal plane), 0.9~1.7 μm of broadband detector of corresponding near-infrared can not obtained
When, lens 205 with inserted between focal plane corresponding beam splitter can to 0.9~1.7 μm of broadband scope of near-infrared point focal plane into
Picture；When needing to be imaged 0.9~1.7 μm of broadband scope subrane of near-infrared, inserted between lens 205 and focal plane and corresponded to
The optical filter of different imaging bands, is capable of achieving the confocal multiwave imaging in face.
The present invention is applied to the purposes such as all kinds of photoelectronic collimating gondolas and capstan head, the civilian monitoring of army and police, Search/Track aiming.
Brief description of the drawings
In order to further fairly set out the present invention, specific embodiment is provided below and is combined with accompanying drawing, to this skill
Art scheme is illustrated, but should not be construed to limitation of the invention.
Fig. 1 is the passive athermal optical imaging system lens model schematic diagram in Near-infrared Double visual field of the invention；
Fig. 2 is the organigram of Fig. 1；
Schematic diagram when Fig. 3~Fig. 4 is different focal of the present invention, wherein, Fig. 3 is 150mm focal lengths, and Fig. 4 is 50mm focal lengths.
In figure：1 focal plane, fixes microscope group after 2,3 zoom microscope groups fix microscope group, 5 object planes, 201 the 3rd positive lens, 202 before 4
4th negative lens, 203 the 4th positive lens, 204 the 5th positive lens, 205 the 5th negative lenses, 301 second negative lenses, 302 the 3rd just
Lens, 303 the 3rd negative lenses, 401 first positive lens, 402 first negative lenses, 403 second positive lens,
Specific embodiment
The passive athermal optical imaging system in Near-infrared Double visual field is described refering to Fig. 1 to be regarded based on image changing for principle of exchange
Field principle, optical imaging system system overall length in the change procedure of focal length is constant, wherein, preceding fixed microscope group 4, afterwards fixed microscope group
2 and focal plane 1 position it is constant；In zooming procedure, the quick fore-and-aft direction motion on optical axis of zoom microscope group 3.During narrow visual field, become
Times microscope group 3 is toward near the translation of the direction side of image planes 1；From narrow visual field, into wide visual field change procedure, zoom microscope group 3 is to object plane 5
The side shifting of direction one.
It is athermal and aberration, the preceding fixed microscope group 4 is successively by using heavy-lanthanide flint glass HZLAF68B, dense flint glass
The dialyte lens group of tri- three-chip types of lens material of glass HZF88 and fluorine crown glass HFK61 three is constituted, with less residual wave
Aberration and heat differential in section.
For athermal and aberration and double-view field zoom is realized, the negative focal power of the tool of zoom microscope group 3, and it is swollen to employ line
Swollen factor alphaiThe weaker combination of materials of smaller and dispersive power.Specifically, zoom microscope group 3 is by the second negative lens 301 and the 3rd
First balsaming lens group of the gluing of positive lens 302 and the 3rd negative lens 303 are constituted, to ensure that a zoom microscope group will not be introduced
Larger heat differential and aberration, meanwhile, zoom microscope group 3 to connect firmly the motor on lens barrel as driving source, by gear-guide rail machine
Structure drives the quick rectilinear movement before and after optical imaging system optical axis direction of zoom microscope group to realize that visual field switches.
Fixed microscope group 2 is to balance the remaining heat differential in front and aberration after described, using eliminate the intersegmental aberration of residual wave and
Heat differential ability it is stronger successively by using fluorine crown glass HFK61, by dense flint glass HZF88 and heavy-lanthanide flint glass
The glued microscope group of the second of HZLAF68B gluings, heavy-lanthanide flint glass HZLAF68B, the chips of dense flint glass HZF88 five are separated
Lens group is constituted.
By lens material by the combinations of pairs of above rule, coordinate the linear expansion coefficient α of general aluminium alloy lens barrelLAnd length
L, and the double-view field Zoom structure of principle is exchanged based on image, realize the common light path Near-infrared Double visual field zoom of athermal simultaneously
Function.
In the passive athermal double-view field optical imaging system of near-infrared optical described by Fig. 2, from object plane 5 to focal plane 1
Fixed microscope group 4, zoom microscope group 3 and rear fixed microscope group 2 before being arranged in order.Preceding fixed microscope group 4 is by three use weights of constant gap
First positive lens 401 of lanthanum flint glass HZLAF68B, the first negative lens 402 using dense flint glass HZF88 and use fluorine
Second positive lens 403 of crown glass HFK61 is constituted.Optical imaging system fixed group 4, zoom group 3, rear fixed group 2 before being divided into,
Wherein, zoom group 3 has negative power, by the second negative lens 301 and dense flint glass using lanthanum flint glass HLAF3B
First balsaming lens group of the gluing of the 3rd positive lens 302 of HZF88 and using the 3rd negative of dense barium flint HZBAF50
Lens 303 are constituted, and are quickly moved forward and backward on optical axis, and when end positions are moved to that should have two visual fields, i.e., two Jiao
Away from.The fixed fixed placement of microscope group 2 is after zoom group mirror 3 afterwards；By with using the 3rd positive lens 201 of fluorine crown glass HFK61,
Using the 4th negative lens 202 and the composition of the 4th positive lens 203 of heavy-lanthanide flint glass HZLAF68B of dense flint glass HZF88
5th negative lens of the second glued microscope group, the 5th positive lens 204 of heavy-lanthanide flint glass HZLAF68B and dense flint glass HZF88
205 are constituted.Preceding fixed group 4, rear fixed group 2 are maintained static in zooming procedure.Zoom microscope group 3 is consolidated with preceding fixed microscope group 4 and afterwards
Horizontal glass group 2 collectively forms complete optical imaging system, and optical imaging system focal length switches and system overall length from 50mm to 150mm
It is constant, when to same Scenery Imaging, all there is preferable image quality without focusing in -40 DEG C~60 DEG C temperature ranges.
Optical imaging system totally three microscope groups, now focal length is 150mm, and preceding fixed mirror is arranged in order to focal plane 1 from object plane 5
Group 4, zoom microscope group 3 and rear fixed microscope group 2.It is by the first positive lens 401 and the first negative lens 402 and the after the object plane 5
Preceding fixed group of the composition of two positive lens 403；Fixed group is just saturating with the 4th by the 3rd positive lens 201, the 4th negative lens 202 successively afterwards
The second glued microscope group, the 5th positive lens 204 and the 5th negative lens 205 that mirror 203 is constituted are constituted；System aperture diaphragm during short focus long
Fixed the 4th positive lens 201 that is located at is on object plane side, and position is constant；Middle zoom microscope group 3 has negative power, by second
Negative lens 301 is constituted with the first balsaming lens group of the gluing of the 3rd positive lens 302 and the 3rd negative lens 303, along optical axis side
Two grades of double-view field zooms are realized in movement forwards, backwards, and when changing to focal length, zoom microscope group 3 is towards the lateral movement of focal plane 1 one；To short
During Jiao's change, zoom microscope group 3 is gun towards the lateral movement of object plane 5 one, motion process, realizes that visual field switches in time.
Preceding fixed microscope group 4 be by focal length about 130.12mm, using using heavy-lanthanide flint glass HZLAF68B first just
Lens 401, focal length are about -205.36mm, and the first negative lens 402 and focal length using dense flint glass HZF88 are about
220.65mm, the three-chip type lens group constituted using second positive lens 403 of fluorine crown glass HFK61.
Zoom microscope group 3 has negative power, is about -142.62mm by focal length, using the second of lanthanum flint glass HLAF3B
The first balsaming lens group and focal length of the gluing of the 3rd positive lens 302 of negative lens 301 and dense flint glass HZF88 be about-
51.64mm, is constituted using the 3rd negative lens 303 of dense barium flint HZBAF50,.In zooming procedure all the time on optical axis
It is movable, in focal length 150mm focal lengths, vertex of surface distance second positive lens 403 of second negative lens 301 towards object plane side
Vertex distance towards focal plane one side is 63.33mm；In short focus 50mm focal lengths, the second negative lens 301 is towards object plane side
The second positive lens of vertex of surface distance 403 towards focal plane one side vertex distance be 26.88mm.
Microscope group 2 is fixed afterwards to be made up of five lens, is by focal length about 66.74mm, using the of fluorine crown glass HFK61
Three positive lens 201, focal length are about 103.90mm, using the 4th negative lens 202 and heavy-lanthanide flint glass of dense flint glass HZF88
Second glued microscope group of the composition of the 4th positive lens 203 of HZLAF68B, focal length are about 79.24mm, using heavy-lanthanide flint glass
5th positive lens 204 and focal length of HZLAF68B are about -89.09mm, using the 5th negative lens 205 of dense flint glass HZF88
Constitute.5th negative lens 205 of focal plane fixed group after being located at is at the side vertex distance about 30.64mm of focal plane 1.
Lens barrel material of the present invention is common aluminum alloy material, and its thermal coefficient of expansion is 236 × 10-7/ K's is common
Aluminum alloy materials, without the lower lens barrel material of other thermal coefficient of expansions.Certainly, it is lower or higher using other thermal coefficient of expansions
Lens barrel material, the radius of curvature of eyeglass, thickness and eyeglass interval etc. is modified using this optical texture, then can be in height
Temperature is lower to obtain the optical property close or more excellent with the present invention.
Be applied to the optical design configurations on 0.9~1.7 μm of near-infrared focus planardetector by this embodiment, pixel chi
Very little is 15 μm of 15 μ m, and catercorner length is 12.28mm, and pixel number is 640 × 512, and embodiment uses F-number F#1.4.
Wherein, F# is the inverse that F-number is entrance pupil bore and the ratio between focal length, i.e. F=f/D.
In the present embodiment, fixed group is 240mm near the overall length of face to the image planes 1 of the side of object plane 5 in the past, and maximum caliber is small
In 130mm, focal range 50mm~150mm, zoom ratio is 3 ×.With less volume, and belong to interior zoom, zoom process
Middle barycenter change is little, and system overall length is constant, and F numbers are constant.
Refering to Fig. 3.Fig. 3 describes the passive athermal optical imaging system in Near-infrared Double visual field that focal length is 150mm to be implemented
Example, wherein, zoom microscope group 3 is by the second negative lens of biconcave lens 301, and the positive lens 302 of biconvex lens the 3rd, biconcave lens the 3rd is negative
Lens 303 are sequentially arranged composition with optical axis, microscope group 2 are fixed afterwards negative by the positive lens 201 of biconvex lens the 3rd, meniscus the 4th
Mirror 202, the positive lens 203 of convex lens the 4th, the positive lens 204 of meniscus the 5th, the negative lens 205 of concavees lens the 5th with optical axis sequentially
It is arranged to make up, fixed microscope group 4 is by towards object plane 5, being close to the preceding fixed group eyeglass of the side concave surface of the first negative lens 402 before constituting
401 are constituted with the second positive lens of meniscus lens 403 for being arranged in the opposite side concave surface of the first negative lens 402.
Refering to Fig. 4.Fig. 4 describes the passive athermal optical imaging system in Near-infrared Double visual field that focal length is 50mm to be implemented
Example, wherein, group eyeglass biconvex lens the first positive lens 401, concave-concave is fixed before being arranged in order along optical axis to focal plane 1 from object plane 5 saturating
The first negative lens of mirror 402 and the second positive lens of meniscus 403, zoom microscope group eyeglass biconcave lens the second negative lens 301, biconvex
It is the positive lens 302 of lens the 3rd, the negative lens 303 of biconcave lens the 3rd and the rear fixed positive lens 201 of group eyeglass biconvex lens the 3rd, convex
The negative lens 202 of concavees lens the 4th, the positive lens 203 of convex lens the 4th, the positive lens 204 of meniscus the 5th, concavees lens the 5th are negative
Mirror 205.System aperture diaphragm is fixed and is located at the positive lens 201 of biconvex lens the 4th on object plane side during short focus long, and position is not
Become；Middle zoom microscope group 3 has negative power, to connect firmly the motor on lens barrel as driving source, by gear-guide rail mechanism
Drive microscope group quickly to be moved linearly before and after optical imaging system optical axis direction, realize two grades of double-view field zooms, become to focal length
During change, zoom microscope group 3 is towards the lateral movement of focal plane 1 one；When changing to short focus, zoom microscope group 3 is transported towards the lateral movement of object plane 5 one
Dynamic process is gun, realizes switching in time, and is collectively formed with preceding fixed microscope group 4 and rear fixed microscope group 2 complete
Optical imaging system.It is optical imaging system that microscope group (2) is fixed afterwards near focal plane (1) side distance that finally one side arrives focal plane (1)
Back work distance, back work distance more than preceding fixed microscope group (4) near object plane (5) side face to eight points of the distance of image planes (1)
One of.Working distance is 30.64mm to fix microscope group after optical imaging system near the focal plane side distance that finally one side arrives focal plane, can
To ensure when 0.9~1.7 μm of broadband detector of corresponding near-infrared can not be obtained, in interleaving for lens (205) and focal plane (1)
Entering corresponding beam splitter carries out broadband point focal plane imaging to the mu m waveband scope of near-infrared 0.9~1.7；Needing to near-infrared
When 0.9~1.7 μm of broadband scope subrane is imaged, insertion is corresponding to different-waveband between lens (205) and focal plane (1)
Optical filter, realizes in the near-infrared confocal face multi-spectral imaging of 0.9~1.7 μm of broadband scope.
By lens material by the combinations of pairs of above rule, coordinate the linear expansion coefficient α of common aluminum alloy lens barrelLWith
Length L, and the double-view field Zoom structure of principle is exchanged based on image, realizes the double-view field zoom of athermal and aberration simultaneously
Function.
The embodiment description of this invention utilized above, its be intended that it is exemplary, not to protection scope of the present invention
Provide constraints.Therefore, it will be apparent to one skilled in the art that not departing from claim proposed by the invention
In the condition of scope, feature replacement or modification can be carried out to the described present invention.
Claims (8)
1. a kind of object lens of large relative aperture near-infrared is total to light path double-view field athermal optical imaging system, including：From object plane（5）To focal plane
（1）It is arranged in order the preceding fixed microscope group for connecting firmly（4）, zoom microscope group（3）With rear fixed microscope group（2）, it is characterised in that：It is solid before described
Horizontal glass group（4）By arranging the first positive lens for connecting firmly after object plane（401）With the first negative lens（402）With the second positive lens
（403）Composition, fixes microscope group afterwards（2）Successively by the 3rd positive lens（201）, the 4th negative lens（202）With the 4th positive lens（203）
The glued microscope group of the second of composition, the 5th positive lens（204）With the 5th negative lens（205）Composition, preceding fixed microscope group（4）, it is rear fixed
Microscope group（2）Maintained static in zooming procedure；Middle zoom microscope group（3）With negative power, by the second negative lens（301）With
Three positive lens（302）Gluing forms the first balsaming lens group and the 3rd negative lens（303）Composition, wherein, preceding fixed microscope group（4）According to
Secondary use heavy-lanthanide flint glass HZLAF68B, dense flint glass HZF88 and tri- lens material matched groups of fluorine crown glass HFK61
Close, microscope group is fixed afterwards（2）Successively using fluorine crown glass HFK61, dense flint glass HZF88, heavy-lanthanide flint glass HZLAF68B,
Heavy-lanthanide flint glass HZLAF68B, five lens material combinations of pairs of dense flint glass HZF88；At short focus position long, diaphragm
Position keeps constant, is fixed on the 4th positive lens（201）Near object plane side；Zoom microscope group（3）Successively by lanthanum flint glass
HLAF3B, dense flint glass HZF88 and tri- lens material compositions of dense barium flint HZBAF50, to connect firmly on lens barrel
Motor is driven as driving source by gear-guide rail mechanism, and two grades of double-view field zooms are realized along optical axis direction is movable,
During to focal length direction change, zoom microscope group（3）Towards the lateral movement of focal plane 1 one, when changing to short focus, zoom microscope group（3）Direction
Object plane（5）Side linear motion realize that visual field switches in time, and with preceding fixed microscope group（4）With rear fixed microscope group（2）Collectively form
Complete optical imaging system.
2. object lens of large relative aperture near-infrared as claimed in claim 1 is total to light path double-view field athermal optical imaging system, its feature
It is:Zoom microscope group（3）Moved forward and backward on optical axis all the time in zooming procedure, in 150mm focal length focal lengths, the second negative lens
（301）Towards the positive lens of vertex of surface distance second of object plane side（403）Vertex distance towards focal plane one side is
63.33mm；In short focus 50mm focal lengths, the second negative lens（301）Towards the positive lens of vertex of surface distance second of object plane side
（403）Vertex distance towards focal plane one side is 26.88mm.
3. object lens of large relative aperture near-infrared as claimed in claim 1 is total to light path double-view field athermal optical imaging system, its feature
It is:Microscope group is fixed afterwards（2）The glued microscope group of middle dense flint glass HZF88 and heavy-lanthanide flint glass HZLAF68B gluings is
Second glued microscope group.
4. object lens of large relative aperture near-infrared as claimed in claim 1 is total to light path double-view field athermal optical imaging system, its feature
It is:Microscope group is fixed afterwards（2）Fixed placement is in zoom group mirror（3）Afterwards；By just saturating with the use fluorine crown glass HFK61 the 3rd
Mirror（201）, using the 4th negative lens of dense flint glass HZF88（202）With heavy-lanthanide flint glass HZLAF68B the 4th is just saturating
Mirror（203）The glued microscope group of the second of composition, the 5th positive lens of heavy-lanthanide flint glass HZLAF68B（204）And dense flint glass
5th negative lens of HZF88（205）Constitute.
5. object lens of large relative aperture near-infrared as claimed in claim 1 is total to light path double-view field athermal optical imaging system, its feature
It is:First fixed group（4）, afterwards fix group（2）Maintained static in zooming procedure；Zoom microscope group（3）With preceding fixed microscope group（4）With
Microscope group is fixed afterwards（2）Complete optical imaging system is collectively formed, optical imaging system focal length switches from 50mm to 150mm and is
System overall length is constant.
6. object lens of large relative aperture near-infrared as claimed in claim 1 is total to light path double-view field athermal optical imaging system, its feature
It is:Group is fixed afterwards（2）By the 3rd positive lens（201）, the 4th negative lens（202）With the 4th positive lens（203）The second of composition
Glued microscope group, the 5th positive lens（204）With the 5th negative lens（205）Constitute；System aperture diaphragm is fixed and is located at the during short focus long
Four positive lens（201）On object plane side, position is constant.
7. object lens of large relative aperture near-infrared as claimed in claim 1 is total to light path double-view field athermal optical imaging system, its feature
It is:It is 236 × 10 to use linear expansion coefficient-7The aluminum alloy materials of/K are used as lens barrel material.
8. object lens of large relative aperture near-infrared as claimed in claim 1 is total to light path double-view field athermal optical imaging system, its feature
It is:Microscope group is fixed afterwards（2）Near focal plane（1）Finally one side arrives focal plane for side（1）Distance for optical imaging system rear work
Away from back work distance is more than preceding fixed microscope group（4）Near object plane（5）The face of side is to image planes（1）Distance 1/8th.
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| CN105223679B true CN105223679B (en) | 2017-06-16 |
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| CN106646865B (en) * | 2016-12-02 | 2019-07-09 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of ultrashort two visual fields infrared optical system |
| CN108415148B (en) * | 2018-04-12 | 2020-04-28 | 西安应用光学研究所 | Photoelectric pod multi-sensor common optical path system |
| CN109781143A (en) * | 2019-01-25 | 2019-05-21 | 苏州大学 | A kind of athermal Dynamic Star simulator optical system |
| CN111458839A (en) * | 2020-04-21 | 2020-07-28 | 中国科学院西安光学精密机械研究所 | Large-view-field low-distortion lens |
| CN112764298B (en) * | 2021-01-31 | 2022-10-11 | 迪擎光电(台州)有限责任公司 | Projection lens system |
| CN113793655B (en) * | 2021-09-14 | 2023-11-03 | 吉林大学 | Athermalization method for optical system based on quantitative combined glass replacement |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102354043A (en) * | 2011-09-23 | 2012-02-15 | 长春理工大学 | Double-view-field/double-color infrared thermal difference eliminating optical system based on harmonic diffractive optical element |
| CN103197406A (en) * | 2012-11-25 | 2013-07-10 | 西南技术物理研究所 | Optical compensation continuous zooming passive athermalization optical system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354043A (en) * | 2011-09-23 | 2012-02-15 | 长春理工大学 | Double-view-field/double-color infrared thermal difference eliminating optical system based on harmonic diffractive optical element |
| CN103197406A (en) * | 2012-11-25 | 2013-07-10 | 西南技术物理研究所 | Optical compensation continuous zooming passive athermalization optical system |
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