CN112433334B - Split type space optical remote sensor focusing structure - Google Patents
Split type space optical remote sensor focusing structure Download PDFInfo
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- CN112433334B CN112433334B CN202011377012.8A CN202011377012A CN112433334B CN 112433334 B CN112433334 B CN 112433334B CN 202011377012 A CN202011377012 A CN 202011377012A CN 112433334 B CN112433334 B CN 112433334B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
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Abstract
A split spatial optical remote sensor focusing structure, comprising: the three crossed roller units increase the bearing capacity of the focusing mechanism, the split type sliding block connecting piece reduces the assembly internal stress and deformation, and the third-stage flexible joint provides flexibility in the corresponding direction; the crossed roller units are uniformly distributed around the movement axis of the focusing mechanism along the circumferential direction and are connected with the fixed seat through screws; the number of the split type slide block connecting pieces corresponds to that of the crossed roller units, and the split type slide block connecting pieces are respectively arranged at the positions corresponding to the slide blocks of the crossed roller units and are tightly attached to the slide blocks of the crossed roller units; third level gentle festival with split type slider connecting piece passes through screw fixed connection, and third level gentle festival is made by the flexure strip. On the premise of meeting the emission impact, the focusing mechanism which is as light as possible, high in precision, high in stability, good in processing and assembling manufacturability has great practical significance for improving the imaging quality of a large space optical remote sensor.
Description
Technical Field
The invention belongs to the technical field of remote sensor focusing, and particularly relates to a split type space optical remote sensor focusing structure.
Background
In order to ensure the on-orbit imaging quality of the space optical remote sensor and eliminate the defocusing phenomenon caused by various reasons, a focusing mechanism is required to be arranged. In recent years, with the development of space detection technology, more severe requirements are made on a focusing mechanism: large size, light weight, high precision, high rigidity and high stability.
At present, focusing mechanism's realization mode has the multiple, and wherein more commonly used is to adopt motor drive, ball screw transmission, the structural style of linear guide direction, and mostly be two guide rail direction, to conventional small-size focusing mirror, this structural style's focusing mechanism can satisfy the task requirement, but when the size of focusing mirror is great, light-weighted, high accuracy, high rigidity and high stability are hardly satisfied simultaneously to traditional method. For example, patent application nos. CN201911062951.0 and CN201910953664.2 disclose two conventional solutions of focusing mechanisms, where the mechanism movement axes of the two focusing mechanisms and the optical axis of the focusing lens have a certain offset distance, so that a large abbe error is generated, and if the focusing lens is small, the abbe error is within an acceptable range, and if the size of the focusing lens is increased, the solution is difficult to meet the requirement of high precision.
And a secondary mirror focusing mechanism is disclosed in patent application No. CN201410842983.3, and although the patent adopts an ingenious structural design to omit a rotation prevention mechanism and improve the reliability and the efficiency of the focusing mechanism, the secondary mirror is smaller, and only one linear bearing is adopted to support the secondary mirror. The precision and rigidity of the focusing mechanism will be greatly limited by the linear bearing, so this solution is not suitable for the secondary mirror with larger size. In addition, some focusing mechanisms adopt a cam or a connecting rod as a driving mode and a worm and gear mechanism as a speed reduction reversing mode, and the focusing mechanism of the type has a complex structure and more parts and is difficult to meet the requirement of light weight. In order to meet the more severe performance requirement of the large-size focusing mirror on the focusing mechanism, the effective scheme is to increase the number of the guide rails, and the rigidity and the bearing capacity of the focusing mechanism can be greatly increased. For example, patent application No. CN201820415762.1 discloses a high-precision space focusing mechanism with an annular layout, in which three guide rail sliders distributed annularly are used to replace the traditional dual-guide rail slider, so as to restrict more degrees of freedom, significantly improve the bearing capacity and rigidity, but it is obviously not easy to ensure that the motion directions of the three guide rail sliders are consistent and no deformation or internal stress is generated, which has extremely strict requirements on the shape and position errors of the guide rail and the mounting surface of the slider, even if the machining precision of the guide rail and the mounting surface of the sliding block is very high, certain assembly errors exist between parts connected with the sliding block and parts connected with the guide rail due to the machining errors of the guide rail, temperature change and other factors, if the errors are large, large internal stress or even deformation can be introduced, the precision and the operation stability of the focusing mechanism are affected, and even the index requirements can not be met. In addition, the movement axis of the mechanism is not coincident with the optical axis of the focusing lens, so that an Abbe error with a large magnitude can be introduced, the three guide rail sliding blocks are not uniformly distributed along the annular direction, and clamping stagnation can occur due to nonuniform stress during movement.
Therefore, aiming at the more severe performance requirement of the focusing lens with larger size on the focusing mechanism, the focusing mechanism with excellent comprehensive performance, namely, the focusing mechanism which realizes the light weight, high precision, high stability and good processing and assembling manufacturability as far as possible has great practical significance for improving the imaging quality of the large space optical remote sensor on the premise of meeting the emission impact.
Disclosure of Invention
In order to overcome the technical problems in the prior art, the invention provides a split type space optical remote sensor focusing structure which is used for solving the problem that a large-size focusing mechanism with excellent comprehensive performance cannot be realized in the traditional technical scheme.
In order to achieve the purpose, the invention adopts the following specific technical scheme:
a split spatial optical remote sensor focusing structure, comprising: at least 3 crossed roller units for increasing the bearing capacity of the focusing mechanism and a split type slide block connecting piece for reducing the assembly internal stress and deformation; the crossed roller units take the motion axis of the focusing mechanism as a central shaft and are uniformly distributed along the circumferential direction of the central shaft; the number of the split type slide block connecting pieces and the number of the crossed roller units are respectively arranged at the positions corresponding to the slide blocks of the crossed roller units and are tightly attached to the slide blocks of the crossed roller units.
Preferably, the cross roller unit is connected with the fixed seat; the fixed seat is provided with mounting surfaces corresponding to the number of the crossed roller units.
Preferably, the three-stage flexible joint further comprises a third-stage flexible joint which is at least made of three elastic sheets, and two ends of each elastic sheet are respectively and fixedly connected with two adjacent split-type sliding block connecting pieces.
Preferably, the device also comprises a focusing lens, an adapter plate, a first-stage flexible joint, a movable platform and a positioning pin; the focusing lens is positioned at the foremost end of the whole focusing mechanism, and the optical axis of the focusing lens is superposed with the movement axis of the focusing mechanism; the first-stage flexible joint is fixed with the focusing lens through epoxy glue; the first-stage flexible joint is fixed on the adapter plate through a screw and is positioned through a positioning pin; the adapter plate is fixed on the movable platform through a screw; the movable platform is a moving component of the focusing mechanism.
Preferably, the device also comprises a movable platform, a second-stage flexible joint, a ball screw and a ball nut; the central part of moving platform passes through the screw and the gentle festival of second level is fixed, the gentle festival of second level with ball screw of ball passes through the mode of screw connection and fixes, hoist mechanism's motion stability.
Preferably, the method further comprises the following steps: the device comprises a grating ruler, a reading head and a reading head fixing seat, wherein the grating ruler is used for providing position feedback for a focusing lens, and the grating ruler is fixed on the fixing seat in an adhesion mode; the reading head is fixed on the reading head fixing seat through a screw and is arranged in parallel with the grating ruler; the reading head fixing seat is fixed on the movable platform through a screw.
Preferably, the method further comprises the following steps: a limiting pin and a limiting seat for limiting the focusing mechanism; the limiting pin is fixed on the side face of the fixed seat through a screw, and the limiting seat is fixed on the movable platform through a screw; the limit seat is provided with a waist hole, and the distance is the maximum stroke of the focusing mechanism.
The invention can obtain the following technical effects:
1. the multiple crossed roller units can increase the bearing capacity of the focusing mechanism, allow the optical axis of the focusing lens to coincide with the movement axis of the mechanism, eliminate Abbe errors and greatly improve the focusing precision. In addition, the uniformly distributed structural form of the crossed roller units can reduce the motion clamping problem caused by nonuniform stress on each crossed roller unit.
2. Due to the arrangement of the split type sliding block connecting piece, the assembly internal stress and even deformation caused by processing and assembly errors in the traditional scheme can be reduced to the maximum extent, and the consistency of the movement directions of the sliding blocks is ensured, so that the precision and the operation stability of the mechanism are improved.
3. The rigidity loss that the split type structure brought can be compensatied to a certain extent in the setting of tertiary gentle festival to can provide the flexibility of corresponding direction, guarantee that focusing mechanism's rigidity satisfies and provide the biggest flexibility under the prerequisite of launching overload condition, release because internal stress and deformation that processing and assembly error brought.
4. Compare with traditional integral type slider connecting piece, split type slider connecting piece cooperation third level is gentle to be economized the weight of slider connecting piece by a wide margin, provides probably for the design of whole focusing mechanism's ultralight quantization.
Drawings
FIG. 1 is a schematic side sectional structural view of a focusing structure of a split type spatial optical remote sensor according to the present invention;
FIG. 2 is a schematic structural diagram of a front cross-sectional view of a split type space optical remote sensor focusing structure according to the present invention;
fig. 3 is a schematic structural diagram of a third stage flexible joint and related components of a split type space optical remote sensor focusing structure according to the present invention.
Wherein the reference numerals are:
the device comprises a focusing lens 1, an adapter plate 2, a first-stage flexible joint 3, a movable platform 4, a positioning pin 5, a repairing and grinding pad 6, a protective seat 7, a split type slide block connecting piece 8, a cross roller unit 9, a slide block 10, a cross roller guide rail 11, a second-stage flexible joint 12, a ball screw 13, a ball screw 14, a fixed seat 15, an angular contact bearing 16, a spacer ring 17, a threaded pressing ring 18, a pressing ring 19, a locking nut 20, a reducer seat 21, a motor seat 22, a coupler A, a harmonic reducer 24, a coupler B25, a motor 26, a grating ruler 27, a reading head 28, a limiting seat 29, a reading head fixed seat 30, a limiting pin 31 and a third-stage flexible joint 32.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. 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 following will describe a split type space optical remote sensor focusing structure provided by the present invention in detail.
Fig. 1-2 show a side sectional view and a front sectional view of a split type space optical remote sensor focusing structure according to the present invention.
As shown in fig. 1-2, a split type space optical remote sensor focusing structure according to an embodiment of the present invention includes: at least three crossed roller units 9 and at least three split type sliding block connecting pieces 8; the crossed roller units 9 are uniformly distributed around the movement axis of the focusing mechanism along the circumferential direction and are connected with the fixed seat 15 through screws; the fixed seat 15 is used for meeting the installation requirement of the crossed roller unit 9, and at least three installation surfaces which are uniformly distributed and correspond to the fixed seat are processed; the split type sliding block connecting pieces 8 adopt a split processing mode, the number of the split type sliding block connecting pieces 8 corresponds to that of the crossed roller units 9, the split type sliding block connecting pieces are respectively arranged at positions corresponding to the sliding blocks 10 of the crossed roller units 9 and are tightly attached to the sliding blocks of the crossed roller units 9, and therefore internal stress and even deformation caused by the fact that the sliding block connecting pieces cannot be tightly attached to the sliding blocks due to processing and assembling errors of the integrated type sliding block connecting pieces in the traditional scheme are avoided.
Compared with the traditional structural form of two guide rails, the invention adopts the structural form that at least three crossed roller units 9 are uniformly distributed along the circumferential direction around the mechanism motion axis, thereby not only increasing the bearing capacity of the focusing mechanism, but also allowing the optical axis of the focusing lens 1 to coincide with the mechanism motion axis, eliminating Abbe errors and greatly improving the focusing precision. Furthermore, the uniformly distributed structure of the cross roller means 9 can reduce the problem of motion jamming caused by non-uniform stress on each cross roller means 9.
Due to the arrangement of the split type sliding block connecting piece 8, the assembly internal stress and even deformation caused by processing and assembly errors in the traditional scheme can be reduced to the maximum extent, the consistency of the movement directions of the sliding blocks 10 is ensured, and the precision and the operation stability of the mechanism are improved.
The crossed roller unit 9 is a high-precision, small and high-rigidity linear motion unit which is provided with a crossed roller guide rail 11 between a high-precision processing workbench and a base; each crossed roller unit 9 is provided with a crossed roller guide rail 11, grooves are arranged on two sides of the crossed roller guide rail 11, sliding blocks 10 are arranged on two sides of the crossed roller guide rail 11, and the sliding blocks 10 are provided with V-shaped guide rail grooves which are matched with the grooves in the crossed roller guide rails 11 to enable the sliding blocks 10 to slide on the two crossed roller guide rails 11.
In the application of the invention, the number of the crossed roller units 9 is at least three, the crossed roller units are uniformly distributed along the circumferential direction by taking a mechanism motion axis as a central axis, and the fixed seat 15 is used for processing at least three mounting surfaces which are uniformly distributed and correspond to the fixed seat in order to meet the mounting requirements of the crossed roller units 9.
Referring to fig. 3, the split type slider connecting piece 8 is installed on both sides of the installation plate with a T-shaped cross section and a convex middle part by adopting a split processing mode. 8 both sides of split type slider connecting piece set up one row of screw hole respectively for link block 10, the top uses the gentle festival 32 of fix with screw third level, and the bottom uses the screw and moves 4 vertical fixation of platform and be connected. The number of the split type slide block connecting pieces 8 is respectively corresponding to the number of the slide blocks 10 in the crossed roller unit 9; like this, split type slider connecting piece 8 must can closely laminate with slider 10, thereby has avoided in the traditional scheme integral type slider connecting piece 8 because processing and assembly error arouse can not closely laminate the internal stress that brings even warp between slider connecting piece and the slider 10. And the invention can easily ensure that the moving directions of the N crossed roller units 9 are parallel only by ensuring that the verticality of each split type slide block connecting piece 8 with the two mounting surfaces of the slide block 10 and the movable platform 4 is high enough.
In this embodiment, the number of the crossed roller units 9 is specifically 3, the crossed roller units are uniformly distributed at 120 degrees by taking the mechanism motion axis as a central axis, and the fixed seat 15 is processed to form 3 mounting surfaces uniformly distributed at 120 degrees to meet the mounting requirements of the crossed roller units 9. The split type slide block connecting pieces 8 adopt a split processing mode, 3 split type slide block connecting pieces are arranged, and the split type slide block connecting pieces are respectively arranged at the positions corresponding to the slide blocks 10 of the crossed roller units 9.
The focusing lens 1 in fig. 1 is an optical path folding element, and is located at the foremost end of the entire focusing mechanism, and the optical axis of the focusing lens 1 coincides with the central axis of the entire mechanism. Focusing mirror 1 adopts the mode of central support, fixes through the epoxy glue with the gentle festival 3 of first order, and the gentle festival 3 of first order is used for releasing the stress concentration of focusing mirror 1 because of the uneven bring of temperature variation to guarantee focusing mirror 1's shape of face precision.
The first-stage flexible joint 3 is fixed on the adapter plate 2 through screws and is positioned through a positioning pin 5. The adapter plate 2 is fixed on the movable platform 4 through screws. The movable platform 4 is a moving part of the focusing mechanism and plays a role in connecting the optical element and the transmission element. The movable platform 4 is fixedly connected with the split type sliding block connecting piece 8 through a screw; the split type slide block connecting piece 8 is fixed on a slide block 10 of the crossed roller unit 9 through a screw, and a crossed roller guide rail 11 of the crossed roller unit 9 is connected with a fixed seat 15 through a screw. The central part of the movable platform 4 is fixedly connected with the second-stage flexible joint 12 through a screw, and the second-stage flexible joint 12 is fixed with the ball screw nut 14 of the ball screw 13 through a screw, so that stress concentration caused by installation errors of a moving shaft system and movement shaking amount to the movable platform 4 is released, and the movement stability of the mechanism is improved.
The ball screw 13 is fixedly supported in the fixed seat 15 through an angular contact bearing 16, the two angular contact bearings 16 are fixed in a back-to-back mode, and a space ring 17 is arranged between the two angular contact bearings 16; the threaded pressing ring 18 is used for axially positioning the angular contact bearing 16 and is fixed in the fixed seat 15 in a threaded connection mode; the lock nut 20 is used for axially preloading the angular contact bearing 16, and a pressing ring 19 is additionally arranged between the angular contact bearing 16 and the lock nut 20 for the convenience of adjustment.
The end of the ball screw 13 is fixed to the output shaft of the harmonic reducer 24 by a coupling a23, and the input shaft of the harmonic reducer 24 is fixed to the output shaft of the motor 26 by a coupling B25. The harmonic reducer 24 is fixed on the reducer seat 21 through screws, and the reducer seat 21 is fixed on the fixed seat 15 through screws; the motor 26 is fixed on the motor base 22 through screws and is positioned at the tail end of the focusing mechanism, and the motor base 22 is fixed with the speed reducer base 21 through screws. The protective seat 7 is fixed on the fixed seat 15 through a screw and is positioned at the periphery of the whole focusing mechanism; the front end of the protective seat 7 is provided with a repairing and grinding pad 6, so that the position of the focusing mechanism on the space camera can be conveniently repaired and adjusted. In order to provide position feedback for the focusing mirror 1, a grating ruler 27 is provided, the grating ruler 27 is fixed on the fixed seat 15 in a bonding manner, the reading head 28 is fixed on the reading head fixed seat 30 in a screw connection manner, and the reading head fixed seat 30 is fixed on the movable platform 4 in a screw connection manner and is arranged in parallel with the grating ruler 27 (as shown in fig. 2).
It is worth noting that the split mounting solution, while solving the internal stress problem associated with the integral mounting, reduces the stiffness of the entire mechanism. Therefore, in order to increase the rigidity of the mechanism properly, the invention provides a third flexible joint 32 at the end of the split slide connector 8.
Fig. 3 shows a structural schematic diagram of a third stage flexible joint and related components of a split type spatial optical remote sensor focusing structure according to an embodiment of the present invention.
As shown in fig. 3, in order to provide a limit for the focusing mechanism, a limit pin 31 is provided, the limit pin 31 is fixed on the side surface of the fixing base 15 in a screw connection manner, the limit pin 31 is a T-shaped structure, a limit seat 29 is installed corresponding to each limit pin 31, the limit seats 29 are fixed on two sides of the movable platform 4 in a screw connection manner, and a space formed by the limit seats 29 and the limit pins 31 provides a limit for the focusing mechanism; the limiting seat 29 is provided with a waist hole, the distance is the maximum stroke of the focusing mechanism, and the T-shaped tip of the limiting pin 31 is arranged on the waist hole of the limiting seat 29. Third level gentle festival 32 passes through screw fixed connection with split type slider connecting piece 8, and in this embodiment, third level gentle festival 32 is the regular hexagon who encloses by three flexure strips connection on split type slider connecting piece 8, the both ends of every flexure strip respectively with two adjacent split type slider connecting piece 8 fixed connection, two components of a whole that can function independently of split type slider connecting piece 8 are connected respectively to two adjacent flexure strips. Third level gentle festival 32 adopts the flexure strip preparation to form, and thickness is less, can provide the flexibility of two directions of perpendicular to optical axis to provide the rigidity that is on a parallel with the optical axis direction, can provide the biggest flexibility under the prerequisite that the rigidity that guarantees focusing mechanism satisfies the transmission overload condition, be used for releasing because internal stress and the deformation that processing and assembly error brought. The thickness of the focusing mechanism needs to be optimized according to the actual requirements of the focusing mechanism, so that better comprehensive performance is obtained.
The third-stage flexible joint 32 can compensate rigidity loss caused by a split structure to a certain extent, can provide flexibility in the corresponding direction, ensures that the rigidity of the focusing mechanism meets the requirement of providing the maximum flexibility under the premise of launching overload conditions, and is used for releasing internal stress and deformation caused by processing and assembling errors. The thickness of the focusing mechanism needs to be optimized according to the actual requirements of the focusing mechanism, so that better comprehensive performance is obtained.
And compare with traditional integral type slider connecting piece, split type slider connecting piece 8 cooperates the gentle festival 32 of tertiary can alleviate the weight of slider 10 connecting piece by a wide margin, provides probably for the design of the super lightweight of whole focusing mechanism.
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 will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that changes, 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 (5)
1. The utility model provides a split type space optical remote sensor focusing structure which characterized in that includes: at least 3 crossed roller units (9) for increasing the bearing capacity of the focusing mechanism and a split type slide block connecting piece (8) for reducing the assembly internal stress and deformation; the crossed roller units (9) take the motion axis of the focusing mechanism as a central shaft and are uniformly distributed along the circumferential direction of the central shaft; the number of the split type slide block connecting pieces (8) is equal to that of the crossed roller units (9), the split type slide block connecting pieces are respectively arranged at the positions corresponding to the slide blocks (10) of the crossed roller units (9) and are tightly attached to the slide blocks (10) of the crossed roller units (9), and the crossed roller units (9) are connected with the fixed seat (15); the fixed seat (15) is provided with mounting surfaces corresponding to the number of the crossed roller units (9); the three-stage flexible joint is characterized by further comprising a third-stage flexible joint (32) made of at least three elastic sheets, wherein two ends of each elastic sheet are fixedly connected with the two adjacent split type sliding block connecting pieces (8) respectively.
2. The split type space optical remote sensor focusing structure of claim 1, further comprising a focusing lens (1), an adapter plate (2), a first stage flexible joint (3), a movable platform (4) and a positioning pin (5); the focusing lens (1) is positioned at the foremost end of the whole focusing mechanism, and the optical axis is superposed with the movement axis of the focusing mechanism; the first-stage flexible joint (3) is fixed with the focusing lens (1) through epoxy glue; the first-stage flexible joint (3) is fixed on the adapter plate (2) through a screw and is positioned through a positioning pin (5); the adapter plate (2) is fixed on the movable platform (4) through screws; the movable platform (4) is a moving part of the focusing mechanism.
3. The split spatial optical remote sensor focusing structure of claim 2, further comprising: a second-stage flexible joint (12), a ball screw (13) and a ball screw nut (14); the central part of the movable platform (4) is fixed with a second-stage flexible joint (12) through a screw, the second-stage flexible joint (12) is fixed with a ball screw nut (14) on a ball screw (13) through a screw connection mode, and the motion stability of the lifting mechanism is improved.
4. The split spatial optical remote sensor focusing structure of claim 3, further comprising: the focusing device comprises a grating ruler (27) for providing position feedback for the focusing lens (1), a reading head (28) and a reading head fixing seat (30), wherein the grating ruler (27) is fixed on the fixing seat (15) in an adhesion mode; the reading head (28) is fixed on the reading head fixing seat (30) through a screw and is arranged in parallel with the grating ruler (27); the reading head fixing seat (30) is fixed on the movable platform (4) through a screw.
5. The split spatial optical remote sensor focusing structure of claim 2, further comprising: a limiting pin (31) and a limiting seat (29) for limiting the focusing mechanism; the limiting pin (31) is fixed on the side face of the fixed seat (15) through a screw, and the limiting seat (29) is fixed on the movable platform (4) through a screw; the limiting seat (29) is provided with a waist hole, and the distance is the maximum stroke of the focusing mechanism.
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| CN116974035A (en) * | 2023-08-16 | 2023-10-31 | 同济大学 | High-precision three-screw linkage secondary mirror focusing mechanism |
| CN117849977A (en) * | 2023-11-30 | 2024-04-09 | 北京极光星通科技有限公司 | Divergence angle changing device and laser communication terminal |
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