CN109239897A - A kind of off-axis three anti-non-focus optical system - Google Patents
A kind of off-axis three anti-non-focus optical system Download PDFInfo
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- CN109239897A CN109239897A CN201811317923.4A CN201811317923A CN109239897A CN 109239897 A CN109239897 A CN 109239897A CN 201811317923 A CN201811317923 A CN 201811317923A CN 109239897 A CN109239897 A CN 109239897A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 46
- 239000004744 fabric Substances 0.000 claims abstract description 4
- 210000001747 pupil Anatomy 0.000 claims description 7
- 238000013461 design Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000004313 glare Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/02—Catoptric systems, e.g. image erecting and reversing system
- G02B17/06—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror
- G02B17/0626—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror using three curved mirrors
- G02B17/0642—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror using three curved mirrors off-axis or unobscured systems in which not all of the mirrors share a common axis of rotational symmetry, e.g. at least one of the mirrors is warped, tilted or decentered with respect to the other elements
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Abstract
The invention discloses a kind of off-axis three anti-non-focus optical system, the present invention sets gradually the first concave reflection primary mirror 1, the first convex refractive secondary mirror 2, three mirror 3 of the second concave reflection, the first plane mirror 4 and second plane mirror 5 along light incident direction；The first concave reflection primary mirror 1, the first convex refractive secondary mirror 2, second concave reflection, three mirror 3 is set gradually from top to bottom, and the first concave reflection primary mirror 1, the first convex refractive secondary mirror 2, second concave reflection, three mirror 3 forms three-legged structure layout, the second plane mirror 5 is arranged in the three-legged structure cloth intra-office, by being arranged so that the light beam that first plane mirror 4 reflects three mirror 3 of the second concave reflection, after the second plane mirror 5 reflection, emergent ray is parallel with the incident ray of the first concave reflection primary mirror 1；It is parallel with the direction of emergent ray by incident ray after repeatedly turning back, so off-axis three anti-system structures of the invention are compact, small in size, be more suitable search, track the application of electro-optical system.
Description
Technical field
The present invention relates to infrared detection technique fields, more particularly to a kind of off-axis three anti-non-focus optical system.
Background technique
In recent years, with the continuous development of science and technology, for airborne and carrier-borne Search tracking system, space remote sensing system
It is required that also higher and higher.Long-focus, heavy caliber, multiband, total aperture optical system are in above-mentioned field using more and more extensive.
Traditional transmission type optical system is limited by material and coating technique, the design difficulty of multiband, altogether aperture transmission formula optical system
Greatly, system complex and size is larger.Although axis reflector formula optical system is able to solve the design difficulty of multiband, total aperture,
But it is not compact enough that there are systems.Off-axis three reflecting optical systems structure is simple, and all optical elements are reflecting element, can not only
Meet the requirement of multiband, total aperture, and volume compact, is at present while to realize long-focus, heavy caliber, multiband, altogether hole
The more reasonable scheme of diameter.
But in fields such as airborne photoelectrics, the bulk of system is required it is stringenter, therefore it is required that in total hole
On the basis of diameter, off-axis three anti-system on the premise of ensuring performance further compress by volume.
Summary of the invention
The present invention provides a kind of off-axis three anti-non-focus optical systems, to solve off-axis three anti-system bulk in the prior art
Big problem.
The present invention provides a kind of off-axis three anti-non-focus optical systems, comprising: sets gradually first along light incident direction
Concave reflection primary mirror 1, the first convex refractive secondary mirror 2, three mirror 3 of the second concave reflection, the first plane mirror 4 and the second plane are anti-
Penetrate mirror 5；
The first concave reflection primary mirror 1, the first convex refractive secondary mirror 2, second concave reflection, three mirror 3 by
Top to bottm is set gradually, and the first concave reflection primary mirror 1, the first convex refractive secondary mirror 2, second concave surface are anti-
It penetrates three mirrors 3 and forms three-legged structure layout, the setting of second plane mirror 5 is made in the three-legged structure cloth intra-office by setting
The light beam that first plane mirror 4 reflects three mirror 3 of the second concave reflection is obtained, through the second plane mirror
After 5 reflections, emergent ray is parallel with the incident ray of the first concave reflection primary mirror 1；
Wherein, the first concave reflection primary mirror 1, the first convex refractive secondary mirror 2, second concave reflection three
The face type of mirror 3 is quadratic surface or the quadratic surface with asphericity coefficient.
Preferably, the system multiplying power Γ of the off-axis three anti-non-focus optical system meets 0.2≤Γ≤1.
Preferably, effective aperture D0Meet 20mm≤D0≤200mm。
Preferably, three mirror 3 of the first concave reflection primary mirror 1 and second concave reflection, using paraboloid or
Paraboloid with asphericity coefficient；
The first convex refractive secondary mirror 2 uses hyperboloid or the hyperboloid with asphericity coefficient.
Preferably, the intermediate image plane of the off-axis three anti-non-focus optical system is arranged in the first convex refractive secondary mirror 2
Between three mirror 3 of the second concave reflection.
Preferably, the entrance pupil of the system be arranged in the first concave reflection primary mirror 1 position or its on the left of.
Preferably, the emergent pupil of the system be arranged in second plane mirror 5 position or its on the right side of.
The present invention has the beneficial effect that:
Off-axis three anti-systems of the invention, it is parallel with the direction of emergent ray by incident ray after repeatedly turning back, so
Off-axis three anti-system structures of the invention are compact, small in size, be more suitable search, track electro-optical system application.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, the followings are specific embodiments of the present invention.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 is the optical principle schematic diagram of off-axis three anti-non-focus optical systems of the embodiment of the present invention；
Fig. 2 is the index path of the embodiment of the present invention；
Fig. 3 is the optical transfer function MTF curve of the embodiment of the present invention；
Fig. 4 is the distortion grid figure of the embodiment of the present invention；
Fig. 5 is wavefront-visual field distribution map of the embodiment of the present invention.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
The embodiment of the invention provides a kind of off-axis three anti-non-focus optical systems characterized by comprising along light incidence
It is anti-that direction sets gradually the first concave reflection primary mirror 1, the first convex refractive secondary mirror 2, three mirror 3 of the second concave reflection, the first plane
Penetrate mirror 4 and second plane mirror 5；
The first concave reflection primary mirror 1, the first convex refractive secondary mirror 2, second concave reflection, three mirror 3 by
Top to bottm is set gradually, and the first concave reflection primary mirror 1, the first convex refractive secondary mirror 2, second concave surface are anti-
It penetrates three mirrors 3 and forms three-legged structure layout, the setting of second plane mirror 5 is made in the three-legged structure cloth intra-office by setting
The light beam that first plane mirror 4 reflects three mirror 3 of the second concave reflection is obtained, through the second plane mirror
After 5 reflections, emergent ray is parallel with the incident ray of the first concave reflection primary mirror 1；
Wherein, the first concave reflection primary mirror 1, the first convex refractive secondary mirror 2, second concave reflection three
The face type of mirror 3 is quadratic surface.
That is, off-axis three anti-systems of the embodiment of the present invention, due to passing through incident ray and outgoing after repeatedly turning back
The direction of light is parallel, so off-axis three anti-system structures of the invention are compact, small in size, is more suitable search, tracking photoelectricity
Systematic difference, and optical system of the invention has the characteristics that big visual field, large aperture, non-stop layer block, system MTF high,
Good imaging quality.
It should be noted that can be received simultaneously due to all reflecting elements of the optical element of optical system of the present invention
The light of different-waveband is without generating color difference, to have multiband, altogether the characteristics of aperture, moreover, optical system of the invention
It can guarantee the requirement of system without carrying out the individual veiling glare design that disappears.
The system multiplying power Γ of off-axis three anti-non-focus optical system described in the embodiment of the present invention meets 0.2≤Γ≤1.
Effective aperture of embodiment of the present invention D0Meet 20mm≤D0≤200mm。
When it is implemented, the first concave reflection primary mirror 1 described in the embodiment of the present invention and three mirror of the second concave reflection
3, using paraboloid or with the paraboloid of asphericity coefficient；
The first convex refractive secondary mirror 2 uses hyperboloid or the hyperboloid with asphericity coefficient.
Also, the intermediate image plane of off-axis three anti-non-focus optical system described in the embodiment of the present invention is arranged on first convex surface
It reflects between secondary mirror 2 and second concave reflection, three mirror 3.
As can be seen from FIG. 1, the position or its left side of the first convex refractive primary mirror 1 is arranged in the system entrance pupil of the embodiment of the present invention
Side.And the system emergent pupil of the embodiment of the present invention be arranged in second plane mirror 5 position or its on the right side of.The present invention passes through tune
It is whole, so that the first plane mirror 4 and second plane mirror 5 by angular compliance, guarantee emergent ray and incident ray
Direction is parallel, to save space.
On the whole, the optical system structure of the embodiment of the present invention is simple, only includes 5 reflecting mirrors.And with focal power
Metal material can be selected in first concave reflection primary mirror 1, the first convex refractive secondary mirror 2 and three mirror 3 of the second convex refractive, and by essence
Close lathe carries out turnery processing, the high production efficiency of eyeglass.
It, below will be specific by one in order to be preferably illustrated to off-axis three anti-non-focus optical systems of the invention
Example carries out detailed explanation and illustration to the present invention.
The embodiment of the present invention is connect in the exit pupil position of system with the ideal camera lens that focal length is 154.3mm, forms total focal length
The imaging Path of Convergent Rays of 540mm, it is specific as shown in Figure 2.The system multiplying power 0.29 of off-axis three reflecting optical system, effective aperture
130mm, field angle are 2.4 ° × 2.8 °, and 3-5 μm and 8-12 μm of design wavelength, the system design parameter is as shown in table 1.
1 system parameter table of table
Rotational symmetry even aspheric surface face type meets following equations:
In above formula, Z be it is aspherical along optical axis direction when being highly the position of Y, rise apart from aspheric vertex of surface, R is
The paraxial curvature radius of lens, K are circular cone coefficient.
The MTF curve of the present embodiment optical system as shown in figure 3, the embodiment of the present invention distortion grid figure as shown in figure 4,
The wavefront of the embodiment of the present invention-visual field distribution map is as shown in Figure 5.From in Fig. 3-5 as can be seen that the implementation that designs according to the present invention
Csr optical system has good imaging performance in medium-wave infrared and long wave infrared region.
Compared to off-axis three traditional anti-systems, optical system of the invention has overall compact shape, more suitable for
Stringenter system, the especially electro-optical system comprising turntable search, tracking are required bulk.
The present invention at least has the advantages that
1. optical system structure of the invention is compact, flat by the direction of incident ray after repeatedly turning back and emergent ray
Row, be more suitable search, tracking electro-optical system application；
2. optical system of the invention has the characteristics that big visual field, large aperture, non-stop layer block, system MTF high, at image quality
It measures；
3. all reflecting elements of the optical element of optical system of the present invention, the light of different-waveband can be received simultaneously and
Color difference is not generated, to have multiband, altogether the characteristics of aperture；
It only include 5 reflecting mirrors 4. optical system structure of the invention is simple.And the first convex refractive master with focal power
Metal material can be selected in mirror 1, the first concave reflection secondary mirror 2 and three mirror 3 of the second convex refractive, and carries out turning by fine turning lathe
Processing, the high production efficiency of eyeglass；
5. optical system of the invention can guarantee the requirement of system without carrying out the individual veiling glare design that disappears.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of off-axis three anti-non-focus optical system characterized by comprising set gradually the first concave surface along light incident direction
It is flat to reflect primary mirror (1), the first convex refractive secondary mirror (2), three mirror of the second concave reflection (3), the first plane mirror (4) and second
Face reflecting mirror (5)；
The first concave reflection primary mirror (1), the first convex refractive secondary mirror (2), three mirror of the second concave reflection (3)
It sets gradually from top to bottom, and the first concave reflection primary mirror (1), the first convex refractive secondary mirror (2), described second
Three mirror of concave reflection (3) forms three-legged structure layout, and the second plane mirror (5) is arranged in the three-legged structure cloth intra-office,
By setting so that the light beam that first plane mirror (4) reflects three mirror of the second concave reflection (3), through described
After second plane mirror (5) reflection, emergent ray is parallel with the incident ray of the first concave reflection primary mirror (1)；
Wherein, the first concave reflection primary mirror (1), the first convex refractive secondary mirror (2), second concave reflection three
The face type of mirror (3) is quadratic surface or the quadratic surface with asphericity coefficient.
2. off-axis three anti-non-focus optical system according to claim 1, which is characterized in that
The system multiplying power Γ of the off-axis three anti-non-focus optical system meets 0.2≤Γ≤1.
3. off-axis three anti-non-focus optical system according to claim 1, which is characterized in that
Effective aperture D0Meet 20mm≤D0≤200mm。
4. off-axis three anti-non-focus optical system according to claim 1, which is characterized in that
The first concave reflection primary mirror (1) and three mirror of the second concave reflection (3) using paraboloid or have aspheric
The paraboloid of face coefficient；
The first convex refractive secondary mirror (2) uses hyperboloid or the hyperboloid with asphericity coefficient.
5. off-axis three anti-non-focus optical system according to claim 1, which is characterized in that
The intermediate image plane of the off-axis three anti-non-focus optical system is arranged in the first convex refractive secondary mirror (2) and described second
Between three mirror of concave reflection (3).
6. off-axis three anti-non-focus optical system according to claim 1, which is characterized in that
The entrance pupil setting of the system is in the position of the first concave reflection primary mirror (1) or its left side.
7. off-axis three anti-non-focus optical system according to claim 1, which is characterized in that
The emergent pupil setting of the system is on the position of second plane mirror (5) or its right side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811317923.4A CN109239897A (en) | 2018-11-07 | 2018-11-07 | A kind of off-axis three anti-non-focus optical system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811317923.4A CN109239897A (en) | 2018-11-07 | 2018-11-07 | A kind of off-axis three anti-non-focus optical system |
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| CN109239897A true CN109239897A (en) | 2019-01-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110927943A (en) * | 2019-12-26 | 2020-03-27 | 中国科学院长春光学精密机械与物理研究所 | An off-axis three-trans diffuse reflector lighting system |
| CN113702007A (en) * | 2021-09-02 | 2021-11-26 | 孝感华中精密仪器有限公司 | Off-axis beam axis difference calibration device and calibration method thereof |
| CN114185162A (en) * | 2021-11-16 | 2022-03-15 | 中国科学院上海技术物理研究所 | A Simple Search and Tracking Integrated Optical System |
| CN117170078A (en) * | 2023-11-02 | 2023-12-05 | 中国科学院长春光学精密机械与物理研究所 | Reflective zoom afocal optical system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128680A (en) * | 2010-12-22 | 2011-07-20 | 中国科学院长春光学精密机械与物理研究所 | Telecentric off-axis three-mirror anastigmatic imaging system with three coaxial reflectors at angle of field of view of 10 degrees |
| CN105334607A (en) * | 2015-12-05 | 2016-02-17 | 中国航空工业集团公司洛阳电光设备研究所 | No-blocking pure reflection optical system |
| CN105467569A (en) * | 2016-01-08 | 2016-04-06 | 苏州大学 | Off-axis three-mirror prepositive optic system |
| CN205899119U (en) * | 2016-06-27 | 2017-01-18 | 中国电子科技集团公司第十一研究所 | Three anti - astigmatism afocal optical system that disappear of off -axis |
| CN209028289U (en) * | 2018-11-07 | 2019-06-25 | 中国电子科技集团公司第十一研究所 | A kind of off-axis three anti-non-focus optical system |
-
2018
- 2018-11-07 CN CN201811317923.4A patent/CN109239897A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128680A (en) * | 2010-12-22 | 2011-07-20 | 中国科学院长春光学精密机械与物理研究所 | Telecentric off-axis three-mirror anastigmatic imaging system with three coaxial reflectors at angle of field of view of 10 degrees |
| CN105334607A (en) * | 2015-12-05 | 2016-02-17 | 中国航空工业集团公司洛阳电光设备研究所 | No-blocking pure reflection optical system |
| CN105467569A (en) * | 2016-01-08 | 2016-04-06 | 苏州大学 | Off-axis three-mirror prepositive optic system |
| CN205899119U (en) * | 2016-06-27 | 2017-01-18 | 中国电子科技集团公司第十一研究所 | Three anti - astigmatism afocal optical system that disappear of off -axis |
| CN209028289U (en) * | 2018-11-07 | 2019-06-25 | 中国电子科技集团公司第十一研究所 | A kind of off-axis three anti-non-focus optical system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110927943A (en) * | 2019-12-26 | 2020-03-27 | 中国科学院长春光学精密机械与物理研究所 | An off-axis three-trans diffuse reflector lighting system |
| CN113702007A (en) * | 2021-09-02 | 2021-11-26 | 孝感华中精密仪器有限公司 | Off-axis beam axis difference calibration device and calibration method thereof |
| CN113702007B (en) * | 2021-09-02 | 2023-09-19 | 孝感华中精密仪器有限公司 | Calibration device and calibration method for off-axis beam axial difference |
| CN114185162A (en) * | 2021-11-16 | 2022-03-15 | 中国科学院上海技术物理研究所 | A Simple Search and Tracking Integrated Optical System |
| CN117170078A (en) * | 2023-11-02 | 2023-12-05 | 中国科学院长春光学精密机械与物理研究所 | Reflective zoom afocal optical system |
| CN117170078B (en) * | 2023-11-02 | 2024-01-12 | 中国科学院长春光学精密机械与物理研究所 | Reflection type zoom afocal optical system |
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