CN107121764B - A kind of medium-wave infrared optical system - Google Patents
A kind of medium-wave infrared optical system Download PDFInfo
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- CN107121764B CN107121764B CN201710415049.7A CN201710415049A CN107121764B CN 107121764 B CN107121764 B CN 107121764B CN 201710415049 A CN201710415049 A CN 201710415049A CN 107121764 B CN107121764 B CN 107121764B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/02—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective
- G02B15/10—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective by adding a part, e.g. close-up attachment
-
- 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
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
- G03B17/17—Bodies with reflectors arranged in beam forming the photographic image, e.g. for reducing dimensions of camera
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
- Microscoopes, Condenser (AREA)
Abstract
The invention discloses groups after a kind of medium-wave infrared optical system, including Based on Dual-Aperture objective lens, zoom group, focusing microscope group, reflection microscope group and secondary imaging；The Based on Dual-Aperture objective lens by principal goods microscope group lens one, principal goods microscope group lens two, short focus principal goods microscope group lens one, short focus principal goods microscope group lens two, short focus refluxing reflection mirror and short focus fixed lens group at；The zoom group is made of short focus zoom reflecting mirror, short focus Zoom lens, middle burnt Zoom lens one, the middle burnt Zoom lens two that can be rotated about the center of rotation；The focusing microscope group is the focusing lens that can be moved forward and backward；The reflection microscope group is by that can form 180 ° of light path folding of reflecting mirror one and reflecting mirror two；Group is made of rear group of lens one, rear group lens two and rear group lens three after the secondary imaging.This optical system is by using Based on Dual-Aperture designing technique, and the third gear for realizing focal length 18/62.5/250mm is variable, and short focus horizontal field of view has reached 30 °, expands equipment range of observation.
Description
Technical field
The present invention relates to infrared optical system, in particular to a kind of medium-wave infrared optical system with Based on Dual-Aperture third gear zoom
System.
Background technique
In recent years, with the continuous extension of the tremendous development of infrared optics technology and its application range, to infrared zoom light
The demand of system is increasingly enhanced.Infrared zoom optical system is able to achieve the change of focal length in a certain range, and in each focal length
Position image planes are stable and keep good image quality, to realize that the size of image planes scenery is variable, generating tight shot can not reach
The good visual effect arrived can achieve big visual field search target, and small field of view examines the purpose of target, in the military and people
There is wide application with field.
Requirement of the electro-optical equipment to infrared zoom optical system is to realize bigger visual field and bigger zoom ratio.It is making
In the infrared variable-power optical system of cold mould, short focus (big visual field) if focal length it is too short, light turns back angle just on preceding two panels lens
Can very little, cause its cold emission to be difficult to control, control cold emission by force and often lead to that image quality is very poor, aberration balancing optimization design is lost
It loses.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to which it is red to provide a kind of medium wave with Based on Dual-Aperture third gear zoom
Outer optical system can be used for refrigeration-type medium-wave infrared focus planar detector.
The technical solution adopted by the present invention to solve the technical problems is: a kind of medium-wave infrared optical system, from object space to
The device of image space sequence installation includes Based on Dual-Aperture objective lens, zoom group, focusing microscope group, reflects group after microscope group and secondary imaging；Institute
The Based on Dual-Aperture objective lens stated are by principal goods microscope group lens one, principal goods microscope group lens two, short focus principal goods microscope group lens one, short focus principal goods mirror
Group lens two, short focus refluxing reflection mirror and short focus fixed lens group at；The zoom group is short by what can be rotated about the center of rotation
Burnt zoom reflecting mirror, short focus Zoom lens, middle burnt Zoom lens one, middle burnt Zoom lens two form；The focusing microscope group is
The focusing lens that can be moved forward and backward；The reflection microscope group is by that can form 180 ° of light path folding of reflecting mirror one and reflecting mirror two；
Group is made of rear group of lens one, rear group lens two and rear group lens three after the secondary imaging, is used for an image planes again
It images in image planes.
A kind of medium-wave infrared optical system, short focus refluxing reflection mirror are installed with optical axis angle at 45 ° in the optical path,
Optical path is turned back 90 °, when short focus zoom reflecting mirror is screwed in optical path, in the optical path relative to short focus refluxing reflection mirror at 180 °,
Optical path is turned back 90 ° again, is entered in main optical path after short focus optical path is finally translated certain distance.
A kind of medium-wave infrared optical system, reflecting mirror one is installed with optical axis angle at 45 ° in the optical path, by optical path
It turns back 90 °, reflecting mirror two is installed relative to the first reflecting mirror at an angle of 90 in the optical path, and optical path is turned back 90 ° again.
A kind of medium-wave infrared optical system, principal goods microscope group lens one, principal goods microscope group lens two, short focus principal goods mirror
The fixed lens of group lens one, short focus principal goods microscope group lens two, short focus, short focus Zoom lens, middle burnt Zoom lens one, middle burnt zoom
Lens two, focusing lens, rear group lens one, rear group lens two, the focal power of rear group lens three be respectively positive and negative, it is negative, positive, just,
It is positive and negative, positive and negative, negative, positive, just.
A kind of medium-wave infrared optical system, positive lens are all made of silicon materials, and the negative lens is all made of germanium
Material.
A kind of medium-wave infrared optical system, principal goods microscope group lens one, short focus principal goods microscope group lens two, short focus are solid
Fix-focus lens, short focus Zoom lens, middle burnt Zoom lens two, focusing lens, rear group lens one, rear group lens two, rear group lens three are
Spherical lens.
A kind of medium-wave infrared optical system, principal goods microscope group lens two, short focus principal goods microscope group lens one, middle burnt change
Times lens one are non-spherical lens.
The beneficial effects of the present invention are:
1, control pop-up: the principal goods mirror lens group of short focus and focal length does not share, and short focus and focal length are divided into two apertures
This mode be totally different from traditional varifocal optical system structure, can realize while meeting high imaging quality to cold
The preferable control of reflection；
2, realize third gear focal length switching: the combination by being transferred to one group of reflecting mirror and lens in focal length Path of Convergent Rays, it is real
The switching of existing focal length and short focus focal length realizes focal length by being transferred to the combination of one group of lens and lens in focal length Path of Convergent Rays
With the switching of middle burnt focal length；
3, zooming time is fast, movement mechanism high reliablity: by the way of rotating two groups of optical elements, zoom mechanism can be adopted
With bearing element fricting movement, zoom resistance is small, and zooming time is fast, is not easy clamping stagnation, high reliablity；
4, good imaging quality: using the combination collocation of aspherical and a variety of infrared optical materials, aberration correction is good, respectively
Focused images are clearly sharp keen；
5, suitable dress property is good: folding the overall length that optical path shortens optical system using reflecting mirror, is reduced using secondary imaging
Aperture of objective lens.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of optical system of the present invention；
Fig. 2 is structural schematic diagram when optical system of the present invention is adjusted to short focus；
Fig. 3 be optical system of the present invention adjust to it is middle burnt when structural schematic diagram；
Fig. 4 is structural schematic diagram when optical system of the present invention is adjusted to focal length；
Fig. 5 is that imaging when optical system of the present invention is adjusted to short focus passes letter figure；
Fig. 6 be optical system of the present invention adjust to it is middle burnt when imaging pass letter figure；
Fig. 7 is that imaging when optical system of the present invention is adjusted to focal length passes letter figure.
Each appended drawing reference are as follows: 1-principal goods microscope group lens one, 2-principal goods microscope group lens two, 3-short focus principal goods microscope group lens
One, 4-short focus principal goods microscope group lens two, 5-short focus refluxing reflection mirrors, the fixed lens of 6-short focus, 7-short focus zoom reflecting mirrors,
8-short focus Zoom lens, 9-middle burnt Zoom lens one, 10-middle burnt Zoom lens two, 11-focusing lens, 12-reflecting mirrors one,
13-rear group lens one, 14-rear group lens two, 15-reflecting mirrors two, 16-rear group lens three.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
Shown in referring to Fig.1, the invention discloses a kind of Based on Dual-Aperture third gear zoom medium-wave infrared optical system, system aperture F
It is 4.0, wave band is 3~5 μm, and focal length is short focus 18mm, middle coke 62.5mm, focal length 250mm third gear, and sequence is pacified from the object side to the image side
The device of dress includes Based on Dual-Aperture objective lens, zoom group, focusing microscope group, reflects group after microscope group and secondary imaging.
The Based on Dual-Aperture objective lens are by principal goods microscope group lens 1, principal goods microscope group lens 22, short focus principal goods microscope group lens
One 3, short focus principal goods microscope group lens 24, the fixed lens 6 of short focus refluxing reflection mirror 5 and short focus form, short focus and focal length, middle burnt
Principal goods microscope group does not share, and is divided into two apertures.
The zoom group is by short focus zoom reflecting mirror 7, short focus Zoom lens 8, middle burnt Zoom lens 1, middle burnt zoom
Lens 2 10 form, short focus zoom reflecting mirror 7 and short focus Zoom lens 8, middle burnt Zoom lens 1 and middle burnt Zoom lens 2 10
It can be rotated about the center of rotation and realize third gear focal length variations；Short focus refluxing reflection mirror 5 is pacified in short focus optical path with optical axis angle at 45 °
Dress, for optical path to be turned back 90 °, when short focus zoom reflecting mirror 7 is screwed in optical path, in the optical path relative to short focus refluxing reflection mirror
5 at 180 °, for optical path to be turned back 90 ° again, enter in main optical path after short focus optical path is finally translated certain distance.
The focusing microscope group is the focusing lens 11 that can be moved forward and backward, and realizes that image planes are drifted about under closely imaging and high/low temperature
Compensation.
The reflection microscope group is made of reflecting mirror 1 and reflecting mirror 2 15, can be 180 ° by light path folding；Reflecting mirror one
12 install with optical axis angle at 45 ° in the optical path, and for optical path to be turned back 90 °, reflecting mirror 2 15 is anti-relative to first in the optical path
It penetrates mirror 12 to install at an angle of 90, for optical path to be turned back 90 ° again.Finally optical path is turned back 180 °.
Group is made of rear group of lens 1, rear group lens 2 14 and rear group lens 3 16 after the secondary imaging, secondary
After imaging group for by an image planes re-imaging in image planes, that is, detector target surface；The aperture diaphragm setting of system is detecting
At device cold stop position, meeting 100% cold stop efficiency requirements, the stray light for avoiding the hot background such as lens barrel from generating enters detector,
Improve the signal-to-noise ratio of output image.
Principal goods microscope group lens 1, principal goods microscope group lens 22, short focus principal goods microscope group lens 1, short focus in this optical system
The fixed lens 6 of principal goods microscope group lens 24, short focus, short focus Zoom lens 8, middle burnt Zoom lens 1, middle burnt Zoom lens 2 10,
Focusing lens 11, rear group lens 1, rear group lens 2 14 and rear group lens 3 16 be respectively it is a piece of, share 12 lens；Short focus folding
Turn reflecting mirror 5, short focus zoom reflecting mirror 7, reflecting mirror 1 and reflecting mirror 2 15 respectively to be a piece of, totally 4 reflecting mirrors.
The principal goods microscope group lens 1, principal goods microscope group lens 22, short focus principal goods microscope group lens 1, short focus principal goods mirror
The fixed lens 6 of group lens 24, short focus, short focus Zoom lens 8, middle burnt Zoom lens 1, middle burnt Zoom lens 2 10, focusing lens
11, afterwards group lens 1, rear group lens 2 14, the focal power of rear group lens 3 16 it is respectively positive and negative, it is negative, positive, just, it is positive and negative,
It is positive and negative, negative, positive, just；Positive lens is all made of silicon materials, and negative lens is all made of germanium material；It is the principal goods microscope group lens 1, short
The fixed lens 6 of burnt principal goods microscope group lens 24, short focus, short focus Zoom lens 8, middle burnt Zoom lens 2 10, focusing lens 11, rear group
Lens 1, rear group lens 2 14, rear group lens 3 16 are spherical lens；The principal goods microscope group lens 22, short focus principal goods mirror
Group lens 1, middle burnt Zoom lens 1 are non-spherical lens.
This optical system realizes f18mm, f62.5mm and f250mm third gear zoom and adopts to evade the cold emission of short focus
With Based on Dual-Aperture mode, i.e. short focus and focal length is divided into two apertures, and the principal goods microscope group of short focus and focal length does not share, only shared rear end light
Components of system as directed is learned, can be realized the preferable control to cold emission, visual field switching (zoom) mode is to cut one instead at focal length end
The mode for penetrating mirror and a lens is switched to short focus, still realizes zoom using the mechanism of similar overturning zoom, makes full use of existing
There is mature structure form, reduces the complexity of zoom mechanism；The control difficulty to cold emission is evaded, can be realized to bigger
The optimization design of visual field.
Convertible zooming system can be realized fast zoom, meet zooming time requirement, and structure size can be made tighter
It gathers, is neutral gear additionally, due to focal length, transmitance can be improved, improve the ability of discovery identification target.But to guarantee in design
Zoom group cannot block optical path at focal length end.
The characteristics of this optical system is according to refrigeration-type infrared optical system, using the optical system structure shape of secondary imaging
Formula.The aperture of lens of this structure type is smaller, and guarantees to reach 100% cold stop efficiency；Entire optical system is divided into preceding group
With rear group of two parts, anamorphosis function is realized in the first image-forming assembly；Preceding group of Polaroid completion zoom function, focusing function
It is arranged on Polaroid preceding group, and compensates image speckles caused by variation of ambient temperature.
This optical system folds optical path using reflecting mirror, compresses the overall length of optical system, reduces volume, improves suitable dress property,
Image quality can be improved using the special face shape such as aspherical, this optical system uses silicon, two kinds of materials of germanium and aspheric design, real
The well-corrected of phenomenon difference, ensure that image quality.
As shown in Fig. 2, Fig. 5, object space light is saturating by principal goods microscope group lens 1, principal goods microscope group lens 22, middle burnt zoom
Mirror 1, middle burnt Zoom lens 2 10 and focusing lens 11 image between reflecting mirror 1 and rear group lens 1, and short focus zoom is anti-
It penetrates mirror 7 and short focus Zoom lens 8 screws in optical path, middle burnt Zoom lens 1 and middle burnt Zoom lens 2 10 screw out optical path, at this time
For short focus, object space light passes through short focus principal goods microscope group lens 1, short focus principal goods microscope group lens 24, short focus refluxing reflection mirror 5, short
The fixed lens 6 of coke, short focus zoom reflecting mirror 7, short focus Zoom lens 8 and focusing lens 11 image in reflecting mirror 1 and after organize lens
Between one 13.
As shown in Fig. 3, Fig. 6, object space light is saturating by principal goods microscope group lens 1, principal goods microscope group lens 22, middle burnt zoom
Mirror 1, middle burnt Zoom lens 2 10 and focusing lens 11 image between reflecting mirror 1 and rear group lens 1, and middle coke zoom is saturating
Mirror 1 and middle burnt Zoom lens 2 10 screw in optical path, short focus zoom reflecting mirror 7 and short focus Zoom lens 8 and screw out optical path, at this time for
Middle coke.
As shown in Fig. 4, Fig. 7, short focus zoom reflecting mirror 7 and short focus Zoom lens 8, middle burnt Zoom lens 1 and middle burnt change
Times lens 2 10 screw out optical path, are at this time neutral gear, and focal length is focal length, and object space light passes through principal goods microscope group lens 1, principal goods mirror
Group lens 22, focusing lens 11 image between reflecting mirror 1 and rear group lens 1.
For this optical system by using Based on Dual-Aperture designing technique, the third gear for realizing focal length 18/62.5/250mm is variable, short
Burnt horizontal field of view has reached 30 °, expands equipment range of observation；Based on Dual-Aperture designing technique has certain advance, expansible to answer
Using other needs in the zoom infrared optical system of big visual field, has a extensive future.
The above-described embodiments merely illustrate the principles and effects of the present invention, and the embodiment that part uses, for
For those skilled in the art, without departing from the concept of the premise of the invention, can also make it is several deformation and
It improves, these are all within the scope of protection of the present invention.
Claims (6)
1. a kind of medium-wave infrared optical system, it is characterised in that: the device of sequence installation includes Based on Dual-Aperture object from the object side to the image side
Group after microscope group, zoom group, focusing microscope group, reflection microscope group and secondary imaging；The Based on Dual-Aperture objective lens are by principal goods microscope group lens
One (1), principal goods microscope group lens two (2), short focus principal goods microscope group lens one (3), short focus principal goods microscope group lens two (4), short focus are turned back
Reflecting mirror (5) and short focus fixed lens (6) composition；The zoom group is by the short focus zoom reflecting mirror that can be rotated about the center of rotation
(7), short focus Zoom lens (8), middle burnt Zoom lens one (9), middle burnt Zoom lens two (10) form；The focusing microscope group is
The focusing lens (11) that can be moved forward and backward；The reflection microscope group is by can be by 180 ° of light path folding of reflecting mirror one (12) and reflecting mirror
Two (15) composition；Group is by rear group of lens one (13), rear group lens two (14) and rear group lens three (16) after the secondary imaging
Composition is used for an image planes re-imaging in image planes；The principal goods microscope group lens one (1), principal goods microscope group lens two
(2), short focus principal goods microscope group lens one (3), short focus principal goods microscope group lens two (4), short focus fixed lens (6), short focus Zoom lens
(8), middle burnt Zoom lens one (9), middle burnt Zoom lens two (10), focusing lens (11), rear group lens one (13), rear group lens two
(14), afterwards the focal power of group lens three (16) it is respectively positive and negative, it is negative, positive, just, it is positive and negative, positive and negative, negative, positive, just.
2. a kind of medium-wave infrared optical system according to claim 1, which is characterized in that the short focus refluxing reflection mirror
(5) it is installed in the optical path with optical axis angle at 45 °, optical path is turned back 90 °, when short focus zoom reflecting mirror (7) is screwed in optical path, in light
Relative to short focus refluxing reflection mirror (5) at 180 ° in road, optical path is turned back 90 ° again, short focus optical path is finally translated into a spacing
Enter in main optical path from rear.
3. a kind of medium-wave infrared optical system according to claim 1, which is characterized in that the reflecting mirror one (12) exists
It installs, optical path is turned back 90 °, reflecting mirror two (15) is in the optical path relative to the first reflecting mirror with optical axis angle at 45 ° in optical path
(12) it installs, optical path is turned back 90 ° at an angle of 90 again.
4. a kind of medium-wave infrared optical system according to claim 1, which is characterized in that the positive lens is all made of silicon
Material, the negative lens are all made of germanium material.
5. a kind of medium-wave infrared optical system according to claim 1, which is characterized in that the principal goods microscope group lens one
(1), short focus principal goods microscope group lens two (4), short focus fixed lens (6), short focus Zoom lens (8), middle burnt Zoom lens two (10),
Focusing lens (11), rear group lens one (13), rear group lens two (14), rear group lens three (16) are spherical lens.
6. a kind of medium-wave infrared optical system according to claim 1, which is characterized in that the principal goods microscope group lens two
(2), short focus principal goods microscope group lens one (3), middle burnt Zoom lens one (9) are non-spherical lens.
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| CN201710415049.7A CN107121764B (en) | 2017-06-05 | 2017-06-05 | A kind of medium-wave infrared optical system |
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| CN201710415049.7A CN107121764B (en) | 2017-06-05 | 2017-06-05 | A kind of medium-wave infrared optical system |
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| CN107121764A CN107121764A (en) | 2017-09-01 |
| CN107121764B true CN107121764B (en) | 2019-05-31 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109683297B (en) * | 2018-12-04 | 2021-04-27 | 湖北久之洋红外系统股份有限公司 | Visible light-medium wave infrared common-caliber long-focus optical system |
| CN110989157A (en) * | 2019-12-17 | 2020-04-10 | 孝感华中精密仪器有限公司 | Method for correcting consistency of optical axes of rear fixed group of folding and rotating zoom camera lens |
| CN113448067B (en) * | 2021-05-21 | 2022-05-20 | 中国科学院西安光学精密机械研究所 | Switching type zooming heat difference eliminating type long-wave infrared zoom lens |
| CN114114623B (en) * | 2021-12-02 | 2024-06-18 | 湖北久之洋红外系统股份有限公司 | High-resolution dual-channel medium wave infrared optical system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590990A (en) * | 2012-03-30 | 2012-07-18 | 昆明物理研究所 | Three-component medium wave infrared 30x continuous zooming optical system |
| CN102866485A (en) * | 2012-09-06 | 2013-01-09 | 中国电子科技集团公司第十一研究所 | Long-wavelength infrared continuous zoom lens |
| CN203231737U (en) * | 2013-04-27 | 2013-10-09 | 中国航天科工集团第三研究院第八三五八研究所 | Photoelectric auto-collimator |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590990A (en) * | 2012-03-30 | 2012-07-18 | 昆明物理研究所 | Three-component medium wave infrared 30x continuous zooming optical system |
| CN102866485A (en) * | 2012-09-06 | 2013-01-09 | 中国电子科技集团公司第十一研究所 | Long-wavelength infrared continuous zoom lens |
| CN203231737U (en) * | 2013-04-27 | 2013-10-09 | 中国航天科工集团第三研究院第八三五八研究所 | Photoelectric auto-collimator |
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