CN113703127A - Square heavy-calibre speculum bearing structure based on back three point supports - Google Patents
Square heavy-calibre speculum bearing structure based on back three point supports Download PDFInfo
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- CN113703127A CN113703127A CN202111044499.2A CN202111044499A CN113703127A CN 113703127 A CN113703127 A CN 113703127A CN 202111044499 A CN202111044499 A CN 202111044499A CN 113703127 A CN113703127 A CN 113703127A
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- flexible joint
- taper sleeve
- reflector
- supporting hole
- mirror
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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
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
- G02B7/183—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors specially adapted for very large mirrors, e.g. for astronomy, or solar concentrators
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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
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
- G02B7/198—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors with means for adjusting the mirror relative to its support
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
The invention provides a square large-aperture reflector supporting structure based on back three-point support, which comprises a reflector body, a first taper sleeve, a second taper sleeve, a third taper sleeve, a first flexible joint, a second flexible joint and a third flexible joint, wherein the reflector body is provided with a first taper sleeve and a second taper sleeve; the lengths of the first flexible joint, the second flexible joint and the third flexible joint are not all equal; the lengths of the first taper sleeve, the second taper sleeve and the third taper sleeve are not all equal; and enabling zero moment points of a first flexible joint fixed in the first supporting hole, a second flexible joint fixed in the second supporting hole and a third flexible joint fixed in the third supporting hole to coincide with the axial position of the neutral plane of the lens body. The surface shape precision of the non-circular symmetrical reflector under the gravity load can be improved, and the reflector keeps good comprehensive surface shape precision.
Description
Technical Field
The invention belongs to the technical field of remote sensing, and particularly relates to a flexible supporting structure with unequal lengths of a square large-caliber reflecting mirror based on back three-point support.
Background
The space optical camera is used in the fields of earth observation, space exploration and the like, and has very important significance. The spatial reflecting mirror is an important part of an optical camera, and the surface shape precision of the spatial reflecting mirror directly influences the imaging performance of the camera. The space reflector enters an on-orbit working state from a ground state and is subjected to complex working conditions such as a transmitting stage with a severe dynamic state, ground gravity unloading, a space thermal environment and the like. In order to ensure the surface shape precision of the reflector, high requirements are put on the supporting structure of the reflector.
In the prior art, a reflector based on back three-point support usually adopts three identical flexible supports, so that the stress of each support is the same, and the influence of gravity load on the surface shape precision of the reflector can be effectively reduced. However, for a square mirror body with non-circumferentially symmetrical mirror structure distribution, the use of exactly the same three support structures may have a large negative impact on the accuracy of the gravity profile.
Disclosure of Invention
The invention provides a supporting method of a square large-caliber reflector, aiming at solving the defect of low gravity surface shape precision of the reflector when a non-circular symmetrical structure distribution square reflector adopts three-point support, so that the reflector keeps good comprehensive surface shape precision. In order to achieve the purpose, the invention adopts the following specific technical scheme:
a square heavy-calibre speculum bearing structure based on back three point support includes: the endoscope comprises an endoscope body, a first taper sleeve, a second taper sleeve, a third taper sleeve, a first flexible section, a second flexible section and a third flexible section;
the mirror body back plate is of a square axisymmetric structure;
the first flexible joint is fixed in a first supporting hole of the endoscope body through a first taper sleeve and a connecting piece;
the second flexible joint is fixed in a second supporting hole of the endoscope body through a second taper sleeve and a connecting piece;
the third flexible joint is fixed in a third supporting hole of the endoscope body through a third taper sleeve and a connecting piece;
the first supporting hole, the second supporting hole and the third supporting hole are uniformly distributed on the same reference circle,
the depths of the first supporting hole, the second supporting hole and the third supporting hole are not all equal;
the lengths of the first flexible joint, the second flexible joint and the third flexible joint are not all equal;
the lengths of the first taper sleeve, the second taper sleeve and the third taper sleeve are not all equal;
the zero moment points of the first flexible joint fixed in the first supporting hole, the second flexible joint fixed in the second supporting hole and the third flexible joint fixed in the third supporting hole are coincided with the axial position of the neutral surface of the lens body.
Preferably, the first support aperture is located on the central axis of the mirror body.
Preferably, the second support hole has the same depth as the third support hole and has a different depth from the first support hole;
the second flexible joint and the third flexible joint have the same length and are different from the first flexible joint;
the second taper sleeve and the third taper sleeve are the same in length and different from the first taper sleeve in length.
Preferably, the mirror body is a non-circumferentially symmetric concave mirror or a non-circumferentially symmetric convex mirror.
Preferably, the concave reflector is a free-form surface concave reflector or a spherical surface concave reflector; the convex reflector is a free-form surface convex reflector or a spherical surface convex reflector.
Preferably, the flexible segment is a necked flexible segment.
The invention can obtain the following technical effects:
1. the invention provides a square large-caliber reflector supporting structure based on back three-point support, which can improve the surface shape precision of a reflector under gravity load and keep the reflector in good comprehensive surface shape precision.
2. The invention provides a square large-caliber reflector supporting structure based on back three-point support, which is suitable for a free-form surface reflector or a spherical reflector.
Drawings
FIG. 1 is a mirror force-bearing schematic diagram of a square large-aperture mirror supporting structure based on back three-point support according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a flexible segment according to one embodiment of the present invention;
fig. 3 is a schematic structural diagram of a square large-aperture reflector according to an embodiment of the present invention.
Reference numerals:
a lens body 1,
A first supporting hole 11, a first flexible joint 12, a first taper sleeve 13,
A second supporting hole 21, a second flexible joint 22, a second taper sleeve 23,
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention.
The invention aims to provide a square large-caliber reflector supporting structure based on back three-point support. The following describes a square large-aperture mirror support structure based on back three-point support according to the present invention in detail by using specific embodiments.
The invention provides a square large-aperture reflector supporting structure based on back three-point support, which comprises a reflector body 1, a first taper sleeve 13, a second taper sleeve 23, a third taper sleeve 33, a first flexible joint 12, a second flexible joint 22 and a third flexible joint 32, as shown in fig. 3. The mirror body back plate 1 is of a square axisymmetric structure; the first flexible joint 12 is fixed in a first supporting hole 11 of the mirror body 1 through a first taper sleeve 13 and a connecting piece;
the second flexible joint 22 is fixed in a second supporting hole 21 of the endoscope body 1 through the second taper sleeve 23 and the connecting piece;
the third flexible joint 32 is fixed in a third supporting hole 31 of the mirror body 1 through a third taper sleeve 33 and a connecting piece;
the first support hole 11, the second support hole 21 and the third support hole 31 are all distributed on the same reference circle on the mirror body 1.
Because the square large-aperture reflector is structurally distributed into the non-circumferentially symmetrical square reflector bodies, if three identical flexible supporting structures are adopted, the gravity surface shape precision of the square large-aperture reflector is influenced, and therefore the invention creatively provides the supporting structures with unequal lengths.
The depth of first supporting hole, second supporting hole and third supporting hole equals inadequately promptly, and the length of first gentle festival, the gentle festival of second and the gentle festival of third equals inadequately, and the length of first taper sleeve, second taper sleeve and third taper sleeve equals inadequately, makes the first gentle festival of utilizing the fix with screw in first supporting hole, fix the gentle festival of second in the second supporting hole and fix the gentle festival of third in the third supporting hole zero moment point all with the axial position coincidence of the neutral plane of square heavy-calibre speculum. The influence of gravity on the surface shape precision of the support component is reduced, and the surface shape precision of the square large-caliber reflector under the gravity load is improved.
In a preferred embodiment of the present invention, in order to reduce the processing difficulty, it is preferable to consider using the symmetry of the square large-aperture mirror, and the first support hole is disposed on the central axis of the square large-aperture mirror, so that the positions of the second support hole and the third support hole are symmetrical with respect to the central axis of the square large-aperture mirror.
Furthermore, when the structures of the taper sleeve and the flexible joint are designed by using software, the length of the second flexible joint is the same as that of the third flexible joint and is different from that of the first flexible joint; the second taper sleeve and the third taper sleeve are the same in length and different from the first taper sleeve in length. Because the depth of the supporting hole is matched with the depth of the flexible joint, the depth of the second supporting hole is the same as that of the third supporting hole, and the depth of the second supporting hole is different from that of the first supporting hole.
In a preferred embodiment of the invention, the necking flexible joint is used, and the design is carried out by utilizing the structure of the design flexible joint, so that the positions of the zero moment points P of the three flexible joints are overlapped with the axial position of the neutral plane of the square large-caliber reflector in the respective supporting holes, and the influence of gravity on the surface shape precision of the reflector is reduced.
Specifically, as shown in the force diagram of fig. 1, M is a neutral plane of a square large-aperture mirror of 1.2 × 1.3M, ∈ 1 is an axial distance between the neutral plane at the first supporting point and the mirror body back plate, ∈ 2 ═ e 3 is an axial distance between the neutral plane at the first supporting point and the mirror body back plate at the second supporting point, respectively, and Δ ∈ is a distance between the neutral plane at the first supporting point and the neutral plane at the second supporting point and the neutral plane at the third supporting point.
By changing the numerical values of epsilon 1 and epsilon 2 which are epsilon 3, the aperture, the curvature radius, the diameter of a reference circle and the requirement of a design index of the square large-aperture reflector are combined, so that delta epsilon is not equal to 0.
Therefore, the supporting structure is suitable for the concave reflector or the convex reflector with the spherical or free-form surface, and can be applied to the support of square reflectors with different calibers and different curvature radiuses.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
The above embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (6)
1. A square large-aperture reflector supporting structure based on back three-point support comprises a reflector body, a first taper sleeve, a second taper sleeve, a third taper sleeve, a first flexible joint, a second flexible joint and a third flexible joint;
the mirror body is of a square axisymmetric structure;
the first flexible joint is fixed in a first supporting hole of the mirror body through the first taper sleeve and the connecting piece;
the second flexible joint is fixed in a second supporting hole of the endoscope body through the second taper sleeve and the connecting piece;
the third flexible joint is fixed in a third supporting hole of the mirror body through the third taper sleeve and a connecting piece;
the first support hole, the second support hole and the third support hole are uniformly distributed on the same reference circle;
it is characterized in that the preparation method is characterized in that,
the depths of the first supporting hole, the second supporting hole and the third supporting hole are not all equal;
the first flexible section, the second flexible section and the third flexible section are not all equal in length;
the first, second and third taper sleeves are not all equal in length;
and enabling zero moment points of the first flexible joint fixed in the first supporting hole, the second flexible joint fixed in the second supporting hole and the third flexible joint fixed in the third supporting hole to coincide with the axial position of a neutral plane of the endoscope body.
2. The square large-aperture mirror support structure based on back three-point support according to claim 1, wherein the first support hole is located on a central axis of the mirror body.
3. The square large-aperture mirror support structure based on back three-point support according to claim 2,
the second supporting hole has the same depth as the third supporting hole and has a different depth from the first supporting hole;
the second flexible joint and the third flexible joint have the same length and different length from the first flexible joint;
the second taper sleeve and the third taper sleeve are the same in length and different from the first taper sleeve in length.
4. The back three-point support-based square large-caliber mirror support structure according to claim 1, wherein the mirror body is a non-circumferentially symmetric concave mirror or a non-circumferentially symmetric convex mirror.
5. The back three-point support-based square large-caliber reflector support structure according to claim 4, wherein the concave reflector is a free-form surface concave reflector or a spherical surface concave reflector; the convex reflector is a free-form surface convex reflector or a spherical surface convex reflector.
6. The square large caliber mirror support structure based on back three point support of claim 1 wherein the flexible joint is a necked flexible joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111044499.2A CN113703127B (en) | 2021-09-07 | 2021-09-07 | Square heavy-calibre speculum bearing structure based on back three point supports |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111044499.2A CN113703127B (en) | 2021-09-07 | 2021-09-07 | Square heavy-calibre speculum bearing structure based on back three point supports |
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| CN113703127A true CN113703127A (en) | 2021-11-26 |
| CN113703127B CN113703127B (en) | 2022-07-15 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109657A (en) * | 2011-02-25 | 2011-06-29 | 中国科学院长春光学精密机械与物理研究所 | Ball hinge support structure of large caliber reflector of space remote sensor |
| CN107577029A (en) * | 2017-09-30 | 2018-01-12 | 中国科学院长春光学精密机械与物理研究所 | Reducing regulation bottom support meanss suitable for large caliber reflecting mirror process |
| CN107703603A (en) * | 2017-09-30 | 2018-02-16 | 中国科学院长春光学精密机械与物理研究所 | A kind of flexible support structure for being applied to back of the body inspection formula rectangle speculum |
| CN107942472A (en) * | 2017-12-07 | 2018-04-20 | 西安工业大学 | Sparse aperture imaging system beam phase compensatory reflex mirror |
-
2021
- 2021-09-07 CN CN202111044499.2A patent/CN113703127B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109657A (en) * | 2011-02-25 | 2011-06-29 | 中国科学院长春光学精密机械与物理研究所 | Ball hinge support structure of large caliber reflector of space remote sensor |
| CN107577029A (en) * | 2017-09-30 | 2018-01-12 | 中国科学院长春光学精密机械与物理研究所 | Reducing regulation bottom support meanss suitable for large caliber reflecting mirror process |
| CN107703603A (en) * | 2017-09-30 | 2018-02-16 | 中国科学院长春光学精密机械与物理研究所 | A kind of flexible support structure for being applied to back of the body inspection formula rectangle speculum |
| CN107942472A (en) * | 2017-12-07 | 2018-04-20 | 西安工业大学 | Sparse aperture imaging system beam phase compensatory reflex mirror |
Non-Patent Citations (1)
| Title |
|---|
| 王晓宇，等: "长条形空间反射镜镜体及其支撑结构设计", 《长春理工大学学报》 * |
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