CN105842953A - Long-focus off-axis three-mirror space camera system for suppressing full-path stray light - Google Patents
Long-focus off-axis three-mirror space camera system for suppressing full-path stray light Download PDFInfo
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- CN105842953A CN105842953A CN201610377790.4A CN201610377790A CN105842953A CN 105842953 A CN105842953 A CN 105842953A CN 201610377790 A CN201610377790 A CN 201610377790A CN 105842953 A CN105842953 A CN 105842953A
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- mirror
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- veiling glare
- light
- light shield
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- 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
- G03B11/00—Filters or other obturators specially adapted for photographic purposes
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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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Elements Other Than Lenses (AREA)
- Studio Devices (AREA)
Abstract
The invention provides a long-focus off-axis three-mirror space camera system for suppressing full-path stray light, belongs to the technical field of space optical remote sensing, and provides a full-path stray light suppression system capable of effectively suppressing the stray light in the field of view and secondary stray light in a back light path to overcome the defects of an existing stray light suppression device. The system comprises an off-axis three-mirror group, a folded mirror, a front substrate, a back substrate, an outer light shield, light stop plates and a focal light shield, wherein the outer light shield is arranged on the back substrate; a primary mirror, a secondary mirror and a three-mirror in the off-axis three-mirror group and the folded mirror are arranged on the front substrate and the back substrate respectively to meet the imaging requirements of the off-axis three-mirror optical system; the light stop plates are fixed on the front substrate and the back substrate to suppress the stray light; and the light path is reflected by the folded mirror, passes through the focal light shield and then images in a focal plane. By a light path stray light suppression principle, the shortages of a conventional light shied are compensated; and the imaging quality of the optical system is improved.
Description
Technical field
The invention belongs to space optical remote technical field, relate to a kind of off-axis three anti-space cameras of long-focus
Complete trails veiling glare suppression system.
Background technology
Off-axis three reflecting optical systems are because having non-stop layer and block, transmit function height, compact conformation, the most simultaneously
Realize the advantages such as big visual field and high-resolution, obtain a wide range of applications in space optical remote field.For
Guarantee the image quality of optical system, the veiling glare of the system of entrance need to be taked braking measure effectively.
The veiling glare entering optical system is essentially divided into three kinds: 1) light outside a veiling glare, i.e. visual field
The veiling glare being directly entered image planes without imaging optical path and formed；2) light outside secondary veiling glare, i.e. visual field
The veiling glare that line enters image planes through the component surface reflections such as lens barrel and scattering and causes；3) veiling glare in field,
The veiling glare that i.e. light in visual field produces due to image-forming component optical surface imperfection.
The way that suppression veiling glare is conventional at present is to arrange outer light shield, in order to obtain more preferable effect, logical
Often can arrange at camera internal and block tabula rasa, and veiling glare paint that light shield inner-wall spraying black is disappeared, this spuious
Xanthophyll cycle system can effectively suppress the secondary veiling glare of a veiling glare and front light path, but due to focal plane near
There is no stray light restraint device, it is impossible to the secondary veiling glare of light path after veiling glare in field and entrance is effectively suppressed.
For, picture element shorter for focal length requires relatively low space camera, this veiling glare suppression system is can
Meet requirement, but for the space camera longer for focal length, picture element requirement is higher, this system is very
Difficult satisfied use requirement.
Summary of the invention
In order to solve problems of the prior art, the invention provides a kind of long-focus off-axis three anti-empty
Between camera complete trails veiling glare suppression system, this system overcomes the deficiency of existing stray light restraint device, carry
Can effectively suppress the complete trails of veiling glare and rear light path secondary veiling glare in veiling glare, especially field miscellaneous for one
Astigmatism suppression system.
It is as follows that the present invention solves the technical scheme that technical problem used:
The off-axis three anti-space camera complete trails veiling glare suppression systems of long-focus, this system includes: off-axis three
Anti-mirror group, refrative mirror, prebasal plate, metacoxal plate, outer light shield and block tabula rasa；Described outer light shield is installed
On the back substrate, primary mirror, secondary mirror, three mirrors and refrative mirror in off-axis three anti-mirror groups are separately mounted to front base
On plate and metacoxal plate, meet off-axis three reflecting optical system imaging requirements；The described tabula rasa that blocks is fixed on prebasal plate
With on metacoxal plate, suppress veiling glare；This system also includes: focal plane light shield；Described light path is via folding
Mirror reflects, after focal plane light shield, and imaging at focal plane.
The invention has the beneficial effects as follows: the present invention uses light path veiling glare to suppress principle, compensate for routine
The deficiency of light shield, can effectively veiling glare and rear light path secondary veiling glare in suppressed field, improving optical system
Image quality.
Accompanying drawing explanation
The off-axis three anti-space camera complete trails veiling glare suppression system structural representations of Fig. 1 long-focus of the present invention
Figure.
The outer shading cover structure schematic diagram of Fig. 2 present invention.
Fig. 3 is for blocking light plate structure schematic diagram.
Fig. 4 is focal plane shading cover structure schematic diagram, and Fig. 4 a is the front view of wainscot, and Fig. 4 b is AA
Sectional view.
Fig. 5 is veiling glare suppression schematic diagram in rear light path secondary veiling glare and field.
In figure: 1, outer light shield, 1-1, diaphragm, 2, first blocks tabula rasa, 2-1, blocks tabula rasa face, 2-2,
Reinforcement, 3, focal plane light shield, 3-1, cover body, 3-2, wainscot, 3-3, outer panels, 4, primary mirror,
5, secondary mirror, 6, three mirrors, 7, refrative mirror, 8, image planes, 9, second blocks tabula rasa, and the 10, the 3rd blocks tabula rasa,
11, the 4th block tabula rasa, 12, prebasal plate, 13, metacoxal plate, 14, light hole and 15, detector.
Detailed description of the invention
With embodiment, the present invention is described in further details below in conjunction with the accompanying drawings.
As it is shown in figure 1, the off-axis three anti-space camera complete trails veiling glare suppression systems of long-focus, this system
Including: off-axis three anti-mirror groups, refrative mirror 7, prebasal plate 12, metacoxal plate 13, outer light shield 1 and block light
Plate；Described prebasal plate 12 and metacoxal plate 13 are arranged in outer light shield 1, the master in off-axis three anti-mirror groups
Mirror 4, secondary mirror 5, three mirror 6 and refrative mirror 7 are separately mounted on prebasal plate 12 and metacoxal plate 13, meet
Off-axis three reflecting optical system imaging requirements；The described tabula rasa that blocks is fixed on prebasal plate 12 and metacoxal plate 13,
Suppression veiling glare；This system also includes: focal plane light shield 3；Described light path reflects via refrative mirror 7,
After focal plane light shield 3, imaging at focal plane.
As in figure 2 it is shown, outer light shield 1 is convex shape；Outside is exterior skin；Internal for by splicing,
The diaphragm 1-1 that the mode of riveting is arranged on exterior skin, is used for suppressing veiling glare.As it is shown on figure 3, the
One blocks tabula rasa 2 for trapezium structure, is formed by blocking tabula rasa face 2-1 and reinforcement 2-2, is arranged on prebasal plate
On.As shown in Figure 4, focal plane light shield 3 includes: cover body 3-1, wainscot 3-2 and outer panels 3-3,
The structure of wainscot 3-2 and outer panels 3-3 is completely the same；As shown in Figure 4 b, described wainscot 3-2 and
Outer panels 3-3 is installed in parallel in cover body 3-1.As shown in fig. 4 a, described wainscot 3-2 and outer panels
Multiple light hole 14 is opened respectively, the corresponding detector 15 of each light hole 14 on wainscot 3-2 on 3-3.
The inner surface of outer light shield 1, block the full surface spraying black of tabula rasa and focal plane light shield 3 and disappear veiling glare paint.
Outer light shield 1 uses carbon fibre composite (T700) to make.First blocks tabula rasa 2 uses carbon fiber to be combined
Material (T700) is made.Focal plane light shield 3 uses carbon fibre composite (T700) to make.
As it is shown in figure 1, light source enters outer light shield 1 by light inlet, light beam is via being arranged on metacoxal plate
Primary mirror 4 back reflection on 13 is to the secondary mirror 5 being arranged on prebasal plate 12, then is reflexed to three mirrors by secondary mirror 5
6, three mirrors 6 reflex to refrative mirror 7, refrative mirror 7 after the light beam reflected passes through focal plane light shield 3,
Imaging at image planes 8.In order to suppress veiling glare, block tabula rasa 2 by first and be arranged on below secondary mirror 5, the
Two block tabula rasa 9 is arranged on above primary mirror 4, and the 3rd blocks tabula rasa 10 is arranged on below refrative mirror 7, and the 4th blocks
Tabula rasa 11 is arranged on above three mirrors 6.First blocks tabula rasa 2 for trapezium structure, and lower surface is installed by screw
On prebasal plate 12；Second blocks tabula rasa 9 is arranged on metacoxal plate 13；3rd blocks before tabula rasa 10 is arranged on
On substrate 12；4th blocks tabula rasa 11 is arranged on metacoxal plate 13；Second blocks tabula rasa the 9, the 3rd blocks tabula rasa
10 and the 4th block the structure of tabula rasa 11 and first to block tabula rasa 2 completely the same.
As it is shown in figure 5, focal plane light shield 3 can effectively block the propagation of the secondary veiling glare of light path after entrance
Path, it is to avoid it injects detector 15；After part, the secondary veiling glare of light path is by outside focal plane light shield 3
After the light hole 14 of panel 3-3 enters focal plane light shield 3, disappear the inwall of veiling glare paint through being coated with black
Absorb, energy attenuation more than 96%, again by wainscot 3-2 after scattering, it is possible to enter detector 15
Veiling glare be greatly decreased；Due to the impact of mirror surface high frequency error, when imaging light reflects
After mirror, can produce veiling glare in field, in focal plane light shield 3 can stop field, veiling glare enters detector 15.
Claims (6)
1. the off-axis three anti-space camera complete trails veiling glare suppression systems of long-focus, this system includes: off-axis
Three anti-mirror groups, refrative mirror, prebasal plate, metacoxal plate, outer light shield and block tabula rasa；Described outer light shield is pacified
Fill on the back substrate, before primary mirror, secondary mirror, three mirrors and the refrative mirror in off-axis three anti-mirror groups is separately mounted to
On substrate and metacoxal plate, meet off-axis three reflecting optical system imaging requirements；The described tabula rasa that blocks is fixed on front base
On plate and metacoxal plate, suppress veiling glare；It is characterized in that, this system also includes: focal plane light shield；Institute
State light path to reflect via refrative mirror, after focal plane light shield, imaging at focal plane.
The off-axis three anti-space camera complete trails veiling glare suppression of long-focus the most according to claim 1 are
System, it is characterised in that described focal plane light shield includes: cover body, wainscot and outer panels；Described inner face
Plate and outer panels are installed in parallel in cover body.
The off-axis three anti-space camera complete trails veiling glare suppression of long-focus the most according to claim 1 are
System, it is characterised in that described wainscot is identical with outer panels structure, and panel is opened multiple light hole respectively,
The corresponding detector of each light hole on wainscot.
The off-axis three anti-space camera complete trails veiling glare suppression of long-focus the most according to claim 1 are
System, it is characterised in that described outer light shield is convex shape；The internally installed diaphragm having suppression veiling glare.
The off-axis three anti-space camera complete trails veiling glare suppression of long-focus the most according to claim 1 are
System, it is characterised in that described in block tabula rasa be trapezium structure.
The off-axis three anti-space camera complete trails veiling glare suppression of long-focus the most according to claim 1 are
System, it is characterised in that the inner surface of described outer light shield, block the tabula rasa full surface spray with focal plane light shield
Coating black disappears veiling glare paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610377790.4A CN105842953B (en) | 2016-05-31 | 2016-05-31 | The three spuious Xanthophyll cycle system of anti-space camera complete trails of focal length distance axis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610377790.4A CN105842953B (en) | 2016-05-31 | 2016-05-31 | The three spuious Xanthophyll cycle system of anti-space camera complete trails of focal length distance axis |
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| Publication Number | Publication Date |
|---|---|
| CN105842953A true CN105842953A (en) | 2016-08-10 |
| CN105842953B CN105842953B (en) | 2019-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610377790.4A Active CN105842953B (en) | 2016-05-31 | 2016-05-31 | The three spuious Xanthophyll cycle system of anti-space camera complete trails of focal length distance axis |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107830976A (en) * | 2017-09-19 | 2018-03-23 | 东北石油大学 | The stray radiation multistage restraining device of ammonia pipe leakage is related to for laser detection |
| CN111025612A (en) * | 2019-11-15 | 2020-04-17 | 中国科学院长春光学精密机械与物理研究所 | Low-cost and small-sized space remote sensing camera |
| CN111610622A (en) * | 2020-06-30 | 2020-09-01 | 吉林工程技术师范学院 | Off-axis three-mirror micro-imaging optical system full-path stray light suppression device |
| CN111999873A (en) * | 2020-08-10 | 2020-11-27 | 北京空间机电研究所 | Linear array push-broom type three-reflector off-axis camera stray light suppression structure |
| CN112051233A (en) * | 2020-08-13 | 2020-12-08 | 中国科学院国家空间科学中心 | Small off-axis three-counter ionosphere imager frame structure |
| CN112068383A (en) * | 2020-09-18 | 2020-12-11 | 长光卫星技术有限公司 | Stray light eliminating assembly suitable for off-axis three-reflection wide-width remote sensing camera |
| CN113125450A (en) * | 2021-04-20 | 2021-07-16 | 江苏善果缘智能科技有限公司 | Scanning device for product surface detection and assembling method thereof |
| CN115657406A (en) * | 2022-11-07 | 2023-01-31 | 中国科学院西安光学精密机械研究所 | Full-aluminum free-form surface camera |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107830976B (en) * | 2017-09-19 | 2019-04-02 | 东北石油大学 | The stray radiation multistage for relating to ammonia pipe leakage for laser detection inhibits device |
| CN107830976A (en) * | 2017-09-19 | 2018-03-23 | 东北石油大学 | The stray radiation multistage restraining device of ammonia pipe leakage is related to for laser detection |
| CN111025612A (en) * | 2019-11-15 | 2020-04-17 | 中国科学院长春光学精密机械与物理研究所 | Low-cost and small-sized space remote sensing camera |
| CN111025612B (en) * | 2019-11-15 | 2021-05-14 | 中国科学院长春光学精密机械与物理研究所 | Low-cost and small-sized space remote sensing camera |
| CN111610622A (en) * | 2020-06-30 | 2020-09-01 | 吉林工程技术师范学院 | Off-axis three-mirror micro-imaging optical system full-path stray light suppression device |
| CN111610622B (en) * | 2020-06-30 | 2024-04-09 | 吉林工程技术师范学院 | Off-axis three-reflector microscopic imaging optical system full-path stray light suppression device |
| CN111999873B (en) * | 2020-08-10 | 2022-07-29 | 北京空间机电研究所 | Linear array push-broom type three-reflector off-axis camera stray light suppression structure |
| CN111999873A (en) * | 2020-08-10 | 2020-11-27 | 北京空间机电研究所 | Linear array push-broom type three-reflector off-axis camera stray light suppression structure |
| CN112051233A (en) * | 2020-08-13 | 2020-12-08 | 中国科学院国家空间科学中心 | Small off-axis three-counter ionosphere imager frame structure |
| CN112051233B (en) * | 2020-08-13 | 2021-06-01 | 中国科学院国家空间科学中心 | Small off-axis three-counter ionosphere imager frame device |
| CN112068383A (en) * | 2020-09-18 | 2020-12-11 | 长光卫星技术有限公司 | Stray light eliminating assembly suitable for off-axis three-reflection wide-width remote sensing camera |
| CN113125450A (en) * | 2021-04-20 | 2021-07-16 | 江苏善果缘智能科技有限公司 | Scanning device for product surface detection and assembling method thereof |
| CN115657406A (en) * | 2022-11-07 | 2023-01-31 | 中国科学院西安光学精密机械研究所 | Full-aluminum free-form surface camera |
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| CN105842953B (en) | 2019-03-22 |
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