CN111175961B - Telescope secondary mirror assembly position detection device, method and system - Google Patents
Telescope secondary mirror assembly position detection device, method and system Download PDFInfo
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- CN111175961B CN111175961B CN201811329253.8A CN201811329253A CN111175961B CN 111175961 B CN111175961 B CN 111175961B CN 201811329253 A CN201811329253 A CN 201811329253A CN 111175961 B CN111175961 B CN 111175961B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/02—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors
- G02B23/10—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors reflecting into the field of view additional indications, e.g. from collimator
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/16—Housings; Caps; Mountings; Supports, e.g. with counterweight
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Abstract
The invention provides a telescope secondary mirror assembly position detection device, method and system, the device includes: including bearing the seat, with bear the secondary mirror truss that the seat is connected, locate the mark target subassembly on the secondary mirror subassembly that awaits measuring and locate the determine module on bearing the seat, mark target subassembly includes a plurality of cross targets, the cross target is located on the outer circumference of the secondary mirror subassembly that awaits measuring, determine module includes laser range finder and a plurality of amesdial collimation telescope, laser range finder and amesdial collimation telescope all locate on bearing the seat. According to the invention, through the design of the target assembly and the detection assembly, the space position variation of the secondary mirror assembly to be detected relative to the primary mirror can be effectively calculated, and the position of the secondary mirror assembly to be detected can be adjusted according to the calculated variation, so that the secondary mirror assembly to be detected is kept at the optimal position, and further, the phenomenon of low position adjustment efficiency of the secondary mirror assembly to be detected caused by an adjustment mode is effectively prevented.
Description
Technical Field
The invention relates to the technical field of telescopes, in particular to a telescope secondary mirror assembly position detection device, method and system.
Background
The R-C optical system of the large telescope can image only by primary and secondary mirrors, and the position precision of the secondary mirror assembly directly influences the imaging effect and the observation capability of the telescope, so that the installation and positioning precision of the secondary mirror assembly is one of important technologies for installation and integration of the large telescope. The secondary mirror subassembly of large-scale telescope generally adopts truss structure, and the secondary mirror is located the top of truss, and when the directional different pitch angle degree of telescope, the change of secondary mirror position can be caused in the deflection of truss, but the specific value of this change volume can't the actual measurement always obtain.
In the process of adjusting the optimal imaging position of the conventional secondary mirror assembly, the adjustment direction and the adjustment size are unknown quantities, the position of the secondary mirror assembly can be adjusted only by adopting an adjustment mode or an observation system star point image mode, and the adjustment needs to be carried out repeatedly, so that the workload is repeated, and the adjustment efficiency is low.
Disclosure of Invention
Based on this, the embodiment of the invention aims to solve the problem that the position adjustment efficiency of the secondary mirror assembly is low due to the adoption of an adjustment mode in the prior art.
In a first aspect, the invention provides a telescope secondary mirror assembly position detection device, which comprises a bearing seat, a secondary mirror truss connected with the bearing seat, a target assembly arranged on a secondary mirror assembly to be detected and a detection assembly arranged on the bearing seat, wherein the target assembly comprises a plurality of cross targets, the cross targets are arranged on the outer circumference of the secondary mirror assembly to be detected, the detection assembly comprises a laser range finder and a plurality of micro-collimating telescopes, and the laser range finder and the micro-collimating telescopes are both arranged on the bearing seat.
Further, in a preferred embodiment of the present invention, the number of the cross targets is three, and the cross targets are uniformly distributed on the outer circumference of the secondary mirror assembly to be measured, the number of the micro collimating telescopes is two, and the laser range finder and the two micro collimating telescopes are uniformly distributed on a circumference and respectively correspond to one cross target.
Further, in a preferred embodiment of the present invention, the range of the laser range finder is greater than the distance between the laser range finder and the secondary mirror assembly to be measured, and the precision of the laser range finder is within 5m and 0.015 mm.
Further, in a preferred embodiment of the present invention, the carrying seat is made of a four-way seat structure.
According to the telescope secondary mirror assembly position detection device, through the design of the target assembly and the detection assembly, the spatial position variation of the secondary mirror assembly to be detected relative to the main seat can be effectively calculated, and the position of the secondary mirror assembly to be detected can be adjusted according to the calculated variation, so that the secondary mirror assembly to be detected is kept at the optimal position, and the phenomenon that the position of the secondary mirror assembly to be detected is low due to the adjustment mode is effectively prevented.
In a second aspect, the invention provides a method for detecting the position of a telescope secondary mirror assembly, which comprises the following steps:
adjusting a first one of the micro-alignment telescopes into parallel light to be emitted, and adjusting the angle of the corresponding first one of the micro-alignment telescopes so as to form a clear image on the corresponding first one of the cross targets;
locking a first micrometric collimating telescope, and respectively acquiring the pixel number of the target surface on the first cross target corresponding to the first micrometric collimating telescope and the distance between the first micrometric collimating telescope and the first cross target so as to calculate the current rotation amount of the secondary mirror assembly to be measured;
when the target rotates angularly, the image of the cross wire can deviate on the target surface of the micrometric collimating telescope, and the rotation amount of the secondary mirror assembly can be calculated according to the pixel number of the target surface and the distance between the micrometric collimating telescope and the cross wire, so that rotation values with equal size and opposite directions are generated, and the two-dimensional rotation adjustment of the secondary mirror assembly to be detected is completed;
adjusting a second micrometric collimating telescope into convergent light for emitting, and adjusting the angle of the corresponding second micrometric collimating telescope to enable the corresponding second cross target to form a clear image;
locking a second micrometric collimating telescope, and respectively acquiring the pixel number of the target surface on the second cross target and the distance between the second micrometric collimating telescope and the second cross target so as to calculate the current translation amount of the secondary mirror assembly to be measured;
when the target is translated, the image of the cross wire can be deviated on the target surface of the micrometric collimating telescope, the translation amount of the secondary mirror assembly can be calculated according to the pixel number of the target surface and the distance between the micrometric collimating telescope and the cross wire, and then translation values with equal size and opposite directions are generated so as to complete two-dimensional translation adjustment of the secondary mirror assembly to be measured;
controlling the laser range finder to measure the distance between the laser range finder and a third cross target corresponding to the laser range finder so as to calculate the distance between the secondary mirror assembly to be measured and the primary mirror assembly;
and adjusting according to the current primary and secondary mirror distance to complete the adjustment of the secondary mirror assembly to be measured in the optical axis direction.
The telescope secondary mirror assembly position detection method is simple to operate and high in detection precision, can quickly complete detection, can effectively calculate the current rotation amount and the current translation amount of the secondary mirror assembly to be detected, and can adjust the position of the secondary mirror assembly to be detected according to the calculated variation amount so as to keep the secondary mirror assembly to be detected at the optimal position, thereby effectively preventing the phenomenon of low position adjustment efficiency of the secondary mirror assembly to be detected caused by adopting an adjustment mode.
In a third aspect, the present invention provides a telescope secondary mirror assembly position detection system, comprising:
the first detection module is used for adjusting the first micro-alignment telescope into parallel light to be emitted, and adjusting the angle of the corresponding first micro-alignment telescope so as to enable the corresponding first cross target to form a clear image;
the first calculation module is used for locking the first micrometric collimating telescope when a clear image is formed on the first cross target, and respectively acquiring the pixel number of the target surface on the first cross target and the distance between the first micrometric collimating telescope and the first cross target so as to calculate the current rotation amount of the secondary mirror assembly to be measured;
the first adjusting module is used for enabling the image of the cross wire to deviate on the target surface of the micro-alignment telescope when the target rotates in an angle, and the rotation amount of the secondary mirror assembly can be calculated according to the pixel number of the target surface and the distance between the micro-alignment telescope and the cross wire, so that rotation values with equal size and opposite directions are generated, and the two-dimensional rotation adjustment of the secondary mirror assembly to be detected is completed;
the second detection module is used for adjusting a second micrometric collimating telescope into convergent light for emergence, and adjusting the angle of the corresponding second micrometric collimating telescope to enable the corresponding second cross target to form a clear image;
the second calculation module is used for locking the second micrometric collimating telescope when a clear image is formed on the second cross target, and respectively acquiring the pixel number of the target surface on the second cross target and the distance between the second micrometric collimating telescope and the second cross target so as to calculate the current translation amount of the secondary mirror assembly to be measured;
the second adjusting module is used for enabling the image of the cross wire to deviate on the target surface of the micrometric collimating telescope when the target translates, and calculating the translation amount of the secondary mirror assembly according to the pixel number of the target surface and the distance between the micrometric collimating telescope and the cross wire so as to generate translation values with equal size and opposite directions to finish the two-dimensional translation adjustment of the secondary mirror assembly to be measured;
the third detection module is used for controlling the laser range finder to measure the distance between the laser range finder and a third cross target corresponding to the laser range finder so as to calculate the distance between the secondary mirror assembly to be detected and the primary mirror assembly;
and the third adjusting module is used for adjusting according to the current primary and secondary mirror distance so as to complete the adjustment of the secondary mirror assembly to be measured in the optical axis direction.
According to the telescope secondary mirror assembly position detection system, through the design of the first detection module, the second detection module and the third detection module, the current rotation amount, the current translation amount and the current eccentricity of the secondary mirror assembly to be detected can be effectively calculated, and through the design of the first adjusting module, the second adjusting module and the third adjusting module, the position of the secondary mirror assembly to be detected can be timely adjusted according to the calculated variation amount, so that the secondary mirror assembly to be detected is kept at the optimal position, and the phenomenon that the position adjusting efficiency of the secondary mirror assembly to be detected is low due to the fact that an adjusting mode is adopted is effectively prevented.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
FIG. 1 is a block diagram of a position detecting apparatus for a telescope secondary mirror assembly according to a first embodiment of the present invention;
FIG. 2 is a schematic top view of the position detecting device of the telescope secondary mirror assembly shown in FIG. 1;
FIG. 3 is a flow chart of a method for detecting the position of a secondary telescope mirror assembly according to a second embodiment of the present disclosure;
FIG. 4 is a schematic structural diagram of a telescope secondary mirror assembly position detection system according to a third embodiment of the present disclosure;
Detailed Description
In order to facilitate a better understanding of the invention, the invention will be further explained below with reference to the accompanying drawings of embodiments. Embodiments of the present invention are shown in the drawings, but the present invention is not limited to the preferred embodiments described above. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
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 do not necessarily 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.
Referring to fig. 1 to 2, a first embodiment of the present invention provides a position detection apparatus for a telescope secondary mirror assembly, including a bearing base 7, a secondary mirror truss 2 connected to the bearing base 7, a target assembly disposed on the secondary mirror assembly 1 to be detected, and a detection assembly disposed on the bearing base 7, wherein the design of the bearing base 7 effectively plays a role of bearing and fixing the secondary mirror truss 2 and the detection assembly, so as to improve the stability of the overall structure of the position detection apparatus for the telescope secondary mirror assembly, and by the design of the secondary mirror truss 2, the bearing and fixing effect on the secondary mirror assembly 1 to be detected is effectively improved, and the detection efficiency is improved.
The target assembly comprises a plurality of cross targets 3, the cross targets 3 are arranged on the outer circumference of the secondary mirror assembly 1 to be detected, the detection assembly comprises a laser range finder 5 and a plurality of micrometric collimating telescopes 4(6), and the laser range finder 5 and the micrometric collimating telescopes 4(6) are arranged on the bearing seat 7.
Specifically, the number of the cross targets 3 is three, and the cross targets are uniformly distributed on the outer circumference of the secondary mirror assembly 1 to be measured, that is, an included angle between a connecting line between the center of the adjacent cross target 3 and the circle center of the outer circumference where the cross target is located is 120 °, the number of the micro collimating telescopes 4(6) is two, the laser range finder 5 and the two micro collimating telescopes 4(6) are uniformly distributed on a circumference and respectively correspond to one cross target 3, that is, in three connecting lines formed by the centers of the laser range finder 5 and the two micro collimating telescopes 4(6) to the circle center of the circumference where the three are located, the included angle between every two connecting lines is 120 °.
In this embodiment, when the operation of detecting the secondary mirror assembly to be detected is performed, the first micro-alignment telescope 4 is aligned with the first cross target 3, the micro-alignment telescope 4 is adjusted to be parallel light to emit, the angle of the micro-alignment telescope 4 is finely adjusted, so that the cross target 3 is marked into a clear image, then the micro-alignment telescope 4 is locked, when the cross target 3 rotates with the secondary mirror, the image of the cross target 3 can be shifted on the target surface of the micro-alignment telescope 4, at this time, the rotation amount of the secondary mirror assembly to be detected 1 can be calculated according to the pixel number of the target surface and the distance between the micro-alignment telescope 4 and the cross target 3, so as to adjust the secondary mirror to generate an opposite rotation amount, thereby completing the adjustment of the two-dimensional rotation of the secondary mirror assembly to be detected 1.
Aligning a second micrometric collimating telescope 6 to a second cross target 3, adjusting the micrometric collimating telescope 6 into convergent light for emitting, finely adjusting the angle of the micrometric collimating telescope 6 to enable the cross target 3 to form a clear image, locking the micrometric collimating telescope 6, when the cross target 3 moves in a translation manner along with a secondary mirror, enabling the image of the cross target 3 to deviate on a target surface of the micrometric collimating telescope 6, and calculating the translation amount of the secondary mirror assembly 1 to be detected according to the pixel number of the target surface and the distance between the micrometric collimating telescope 6 and the cross target 3, so that the secondary mirror is adjusted to generate opposite translation amounts, and the adjustment of the two-dimensional translation of the secondary mirror assembly 1 to be detected is completed.
Preferably, the distance between the laser range finder 5 and the corresponding cross target 3 is directly measured, and the distance between the secondary mirror assembly 1 to be measured and the primary mirror assembly is calculated. Therefore, the spatial position variation of the secondary mirror assembly 1 to be detected relative to the bearing seat 7 can be determined, the variation of the secondary mirror assembly 1 to be detected in the observation process of the telescope can be monitored by utilizing the step, and the position of the secondary mirror assembly 1 to be detected can be adjusted according to the variation, so that the secondary mirror assembly 1 to be detected is kept at the optimal position.
The measuring range of the laser range finder 5 is larger than the distance between the laser range finder 5 and the secondary mirror assembly 1 to be measured, and the precision of the laser range finder is within 0.015mm from 5 m. The bearing seat 7 is made of a four-way seat structure
Above-mentioned telescope secondary mirror subassembly position detection device, through mark target subassembly with the design of determine module can effective calculation the secondary mirror subassembly 1 that awaits measuring for bear the weight of the spatial position variation of seat 7, and can be according to the variation adjustment that calculates the secondary mirror subassembly 1 position that awaits measuring, so that the secondary mirror subassembly 1 that awaits measuring keeps in the optimum position, and then has effectively prevented because adopt the regulation mode to lead to the phenomenon that the secondary mirror subassembly 1 position control of awaiting measuring is inefficient.
Referring to fig. 3, a flowchart of a method for detecting a position of a telescope secondary mirror assembly according to a second embodiment of the present disclosure is shown, the method includes steps S10 to S80.
Step S10, the first micro-alignment telescope is adjusted into parallel light to be emitted, and the angle of the corresponding first micro-alignment telescope is adjusted to enable the corresponding first cross target to form a clear image;
step S20, locking a first micro-alignment telescope, and respectively obtaining the pixel number of the target surface on the first cross target and the distance between the first micro-alignment telescope and the first cross target so as to calculate the current rotation amount of the secondary mirror assembly to be measured;
step S30, when the target rotates angularly, the image of the cross wire will deviate on the target surface of the micro-alignment telescope, and the rotation amount of the secondary mirror assembly can be calculated according to the pixel number of the target surface and the distance between the micro-alignment telescope and the cross wire, so as to generate rotation values with equal size and opposite directions, and to complete the two-dimensional rotation adjustment of the secondary mirror assembly to be measured;
step S40, adjusting the second micro-alignment telescope into convergent light for emergence, and adjusting the angle of the corresponding second micro-alignment telescope to form a clear image on the corresponding second cross target;
step S50, locking a second micro-alignment telescope, and respectively obtaining the pixel number of the target surface on the second cross target and the distance between the second micro-alignment telescope and the second cross target so as to calculate the current translation amount of the secondary mirror component to be measured;
step S60, when the target is translated, the image of the cross hair will be deviated on the target surface of the micrometric collimating telescope, and the translation amount of the secondary mirror assembly can be calculated according to the pixel number of the target surface and the distance between the micrometric collimating telescope and the cross hair, so as to generate translation values with equal size and opposite directions, and further complete the two-dimensional translation adjustment of the secondary mirror assembly to be measured;
step S70, controlling the laser range finder to measure the distance between the laser range finder and the third corresponding cross target so as to calculate the distance between the secondary mirror assembly to be measured and the primary mirror assembly;
and step S80, adjusting according to the current primary and secondary mirror distance to complete the adjustment of the secondary mirror assembly to be measured in the optical axis direction.
The telescope secondary mirror assembly position detection method is simple to operate and high in detection precision, can finish detection quickly, can effectively calculate the current rotation amount, the current translation amount and the current eccentricity amount of the secondary mirror assembly to be detected, and can adjust the position of the secondary mirror assembly to be detected according to the calculated variation amount so as to keep the secondary mirror assembly to be detected at the optimal position, thereby effectively preventing the phenomenon of low position adjustment efficiency of the secondary mirror assembly to be detected caused by adopting an adjustment mode.
Referring to fig. 4, a schematic structural diagram of a position detecting system 100 for a telescope secondary mirror assembly according to a third embodiment of the present disclosure includes:
the first detection module 10 is configured to tune a first one of the micro-alignment telescopes into parallel light to be emitted, and adjust an angle of the corresponding first one of the micro-alignment telescopes, so that a clear image is formed on the corresponding first one of the cross targets;
the first calculating module 11 is configured to lock the first micro-alignment telescope when a clear image is formed on the first cross target, and obtain the number of pixels on the target surface of the first cross target and the distance between the first micro-alignment telescope and the first cross target, respectively, so as to calculate the current rotation amount of the secondary mirror assembly to be measured;
the first adjusting module 12 is configured to offset an image of the cross wire on a target surface of the micro-alignment telescope when the target rotates angularly, and calculate a rotation amount of the secondary mirror assembly according to a pixel number of the target surface and a distance between the micro-alignment telescope and the cross wire, so as to generate rotation values with equal size and opposite directions, thereby completing two-dimensional rotation adjustment of the secondary mirror assembly to be measured;
the second detection module 13 is configured to tune a second one of the micro-alignment telescopes into a convergent light for emission, and adjust an angle of the corresponding second one of the micro-alignment telescopes, so as to form a clear image on the corresponding second one of the cross targets;
the second calculating module 14 is configured to lock the second micro-alignment telescope when a clear image is formed on the second cross target, and obtain the number of pixels on the target surface of the second cross target and the distance between the second micro-alignment telescope and the second cross target, respectively, so as to calculate the current translation amount of the secondary mirror assembly to be measured;
the second adjusting module 15 is used for shifting the image of the cross wire on the target surface of the micro-alignment telescope when the target translates, and calculating the translation amount of the secondary mirror assembly according to the pixel number of the target surface and the distance between the micro-alignment telescope and the cross wire, so as to generate translation values with equal size and opposite directions to complete two-dimensional translation adjustment of the secondary mirror assembly to be measured;
the third detection module 16 is configured to control the laser range finder to measure a distance between the laser range finder and a third corresponding cross target, so as to calculate a distance between the secondary mirror assembly to be detected and the primary mirror assembly;
and the third adjusting module 17 adjusts according to the current primary and secondary mirror distance to complete the adjustment of the secondary mirror assembly to be measured in the optical axis direction.
According to the telescope secondary mirror assembly position detection system 100, through the design of the first detection module 10, the second detection module 13 and the third detection module 16, the current rotation amount, the current translation amount and the current eccentricity amount of the secondary mirror assembly to be detected can be effectively calculated, and through the design of the first adjusting module 12, the second adjusting module 15 and the third adjusting module 17, the position of the secondary mirror assembly to be detected can be timely adjusted according to the calculated variation amount, so that the secondary mirror assembly to be detected is kept at the optimal position, and the phenomenon that the position adjusting efficiency of the secondary mirror assembly to be detected is low due to the adoption of an adjusting mode is effectively prevented.
The embodiment also provides a mobile terminal, which comprises a storage device and a processor, wherein the storage device is used for storing a computer program, and the processor runs the computer program to enable the mobile terminal to execute the position detection method of the telescope secondary mirror assembly.
The present embodiment also provides a storage medium on which a computer program used in the above-mentioned mobile terminal is stored, which when executed, includes the steps of:
adjusting a first one of the micro-alignment telescopes into parallel light to be emitted, and adjusting the angle of the corresponding first one of the micro-alignment telescopes so as to form a clear image on the corresponding first one of the cross targets;
locking a first micrometric collimating telescope, and respectively acquiring the pixel number of the target surface on the first cross target corresponding to the first micrometric collimating telescope and the distance between the first micrometric collimating telescope and the first cross target so as to calculate the current rotation amount of the secondary mirror assembly to be measured;
when the target rotates angularly, the image of the cross wire can deviate on the target surface of the micrometric collimating telescope, and the rotation amount of the secondary mirror assembly can be calculated according to the pixel number of the target surface and the distance between the micrometric collimating telescope and the cross wire, so that rotation values with equal size and opposite directions are generated, and the two-dimensional rotation adjustment of the secondary mirror assembly to be detected is completed;
adjusting a second micrometric collimating telescope into convergent light for emitting, and adjusting the angle of the corresponding second micrometric collimating telescope to enable the corresponding second cross target to form a clear image;
locking a second micrometric collimating telescope, and respectively acquiring the pixel number of the target surface on the second cross target and the distance between the second micrometric collimating telescope and the second cross target so as to calculate the current translation amount of the secondary mirror assembly to be measured;
when the target is translated, the image of the cross wire can be deviated on the target surface of the micrometric collimating telescope, the translation amount of the secondary mirror assembly can be calculated according to the pixel number of the target surface and the distance between the micrometric collimating telescope and the cross wire, and then translation values with equal size and opposite directions are generated so as to complete two-dimensional translation adjustment of the secondary mirror assembly to be measured;
controlling the laser range finder to measure the distance between the laser range finder and the third cross target corresponding to the laser range finder so as to calculate the distance between the secondary mirror assembly to be measured and the primary mirror assembly;
and adjusting according to the current primary and secondary mirror distance to complete the adjustment of the secondary mirror assembly to be measured in the optical axis direction. The storage medium, such as: ROM/RAM, magnetic disk, optical disk, etc.
It should be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional units and modules is only used for illustration, and in practical applications, the above function distribution may be performed by different functional units or modules as needed, that is, the internal structure of the storage device is divided into different functional units or modules to perform all or part of the above described functions. Each functional unit and module in the embodiments may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit, and the integrated unit may be implemented in a form of hardware, or may be implemented in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application.
Those skilled in the art will appreciate that the configuration shown in fig. 4 is not intended to be limiting, and may include more or fewer components than those shown, or some components in combination, or a different arrangement of components, and that the method of detecting the position of the telescope secondary mirror assembly in fig. 3 may be implemented using more or fewer components than those shown in fig. 1-2, or some components in combination, or a different arrangement of components. The modules and the like referred to herein are a series of computer programs that can be executed by a processor (not shown) in the standby telescope secondary mirror assembly position detection system and that can perform specific functions, and all of the computer programs can be stored in a storage device (not shown) of the standby telescope secondary mirror assembly position detection system.
The above-described embodiments describe the technical principles of the present invention, and these descriptions are only for the purpose of explaining the principles of the present invention and are not to be construed as limiting the scope of the present invention in any way. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (5)
1. A telescope secondary mirror assembly position detection device is characterized by comprising a bearing seat, a secondary mirror truss connected with the bearing seat, a target assembly arranged on the secondary mirror assembly to be detected and a detection assembly arranged on the bearing seat, wherein the target assembly comprises a plurality of cross targets, the cross targets are arranged on the outer circumference of the secondary mirror assembly to be detected, the detection assembly comprises a laser range finder and a plurality of micrometric collimating telescopes, and the laser range finder and the micrometric collimating telescopes are both arranged on the bearing seat;
the number of the cross targets is three, the cross targets are uniformly distributed on the outer circumference of the secondary mirror assembly to be measured, the number of the micro collimating telescopes is two, and the laser range finder and the two micro collimating telescopes are uniformly distributed on a circumference and respectively correspond to one cross target;
adjusting a first one of the micrometric collimating telescopes into parallel light to be emitted, and adjusting the angle of the first one of the micrometric collimating telescopes so as to enable the corresponding first one of the cross targets to form a clear image;
locking a first micro-alignment telescope, and respectively acquiring the pixel number of the target surface on the first cross target and the distance between the first micro-alignment telescope and the first cross target so as to calculate the current rotation amount of the secondary mirror assembly to be measured;
adjusting a second micrometric collimating telescope into convergent light for emergence, and adjusting the angle of the second micrometric collimating telescope to enable a corresponding second cross target to form a clear image;
locking a second micrometric collimating telescope, and respectively acquiring the pixel number of the target surface on the second cross target and the distance between the second micrometric collimating telescope and the second cross target so as to calculate the current translation amount of the secondary mirror assembly to be measured;
and controlling the laser range finder to measure the distance between the laser range finder and the third cross target corresponding to the laser range finder so as to calculate the distance between the secondary mirror assembly to be measured and the primary mirror assembly.
2. The telescope secondary mirror assembly position detection device of claim 1, wherein the range of the laser range finder is greater than the distance between the laser range finder and the secondary mirror assembly to be measured, and the precision of the laser range finder is within 0.015mm from 5 m.
3. The telescopic secondary mirror assembly position detection device of claim 1, wherein: the bearing seat is made of a four-way seat structure.
4. A telescope secondary mirror assembly position detection method realized by the telescope secondary mirror assembly position detection apparatus according to claim 1, characterized by comprising the steps of:
adjusting a first one of the micrometric collimating telescopes into parallel light to be emitted, and adjusting the angle of the corresponding first one of the micrometric collimating telescopes so as to enable the corresponding first one of the cross targets to form a clear image;
locking a first micrometric collimating telescope, and respectively acquiring the pixel number of the target surface on the first cross target corresponding to the first micrometric collimating telescope and the distance between the first micrometric collimating telescope and the first cross target so as to calculate the current rotation amount of the secondary mirror assembly to be measured;
when the target rotates angularly, the image of the cross wire can deviate on the target surface of the micrometric collimating telescope, and the rotation amount of the secondary mirror assembly can be calculated according to the pixel number of the target surface and the distance between the micrometric collimating telescope and the cross wire, so that rotation values with equal size and opposite directions are generated, and the two-dimensional rotation adjustment of the secondary mirror assembly to be detected is completed;
adjusting a second micrometric collimating telescope into convergent light for emitting, and adjusting the angle of the corresponding second micrometric collimating telescope to enable the corresponding second cross target to form a clear image;
locking a second micrometric collimating telescope, and respectively acquiring the pixel number of the target surface on the second cross target and the distance between the second micrometric collimating telescope and the second cross target so as to calculate the current translation amount of the secondary mirror assembly to be measured;
when the target translates, the image of the cross wire can deviate on the target surface of the micrometric collimating telescope, and the translation amount of the secondary mirror assembly can be calculated according to the pixel number of the target surface and the distance between the micrometric collimating telescope and the cross wire, so that translation values with equal size and opposite directions are generated, and the two-dimensional translation adjustment of the secondary mirror assembly to be measured is completed;
controlling the laser range finder to measure the distance between the laser range finder and a third cross target corresponding to the laser range finder so as to calculate the distance between the secondary mirror assembly to be measured and the primary mirror assembly;
and adjusting according to the current primary and secondary mirror distance to complete the adjustment of the secondary mirror assembly to be measured in the optical axis direction.
5. A telescope secondary mirror assembly position detection system performed based on the telescope secondary mirror assembly position detection apparatus according to claim 1, comprising:
the first detection module is used for adjusting the first micrometric collimating telescope into parallel light to be emitted and adjusting the angle of the corresponding first micrometric collimating telescope so as to enable the corresponding first cross target to form a clear image;
the first calculation module is used for locking the first micrometric collimating telescope when a clear image is formed on the first cross target, and respectively acquiring the pixel number of the target surface on the first cross target and the distance between the first micrometric collimating telescope and the first cross target so as to calculate the current rotation amount of the secondary mirror assembly to be measured;
the first adjusting module is used for enabling the image of the cross wire to deviate on the target surface of the micro-alignment telescope when the target rotates angularly, and the rotation amount of the secondary mirror assembly can be calculated according to the pixel number of the target surface and the distance between the micro-alignment telescope and the cross wire, so that rotation values with equal size and opposite directions are generated, and the two-dimensional rotation adjustment of the secondary mirror assembly to be detected is completed;
the second detection module is used for adjusting the second micrometric collimating telescope into convergent light for emergence and adjusting the angle of the corresponding second micrometric collimating telescope so as to enable the corresponding second cross target to form a clear image;
the second calculation module is used for locking the second micrometric collimating telescope when a clear image is formed on the second cross target, and respectively acquiring the pixel number of the target surface on the second cross target and the distance between the second micrometric collimating telescope and the second cross target so as to calculate the current translation amount of the secondary mirror assembly to be measured;
the second adjusting module is used for enabling the image of the cross wire to deviate on the target surface of the micrometric collimating telescope when the target translates, and calculating the translation amount of the secondary mirror assembly according to the pixel number of the target surface and the distance between the micrometric collimating telescope and the cross wire, so that translation values with equal size and opposite directions are generated, and two-dimensional translation adjustment of the secondary mirror assembly to be measured is completed;
the third detection module is used for controlling the laser range finder to measure the distance between the laser range finder and a third cross target corresponding to the laser range finder so as to calculate the distance between the secondary mirror assembly to be measured and the primary mirror assembly;
and the third adjusting module is used for adjusting according to the current primary and secondary mirror distance so as to complete the adjustment of the secondary mirror assembly to be measured in the optical axis direction.
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| CN114279687B (en) * | 2021-12-17 | 2023-01-03 | 中国科学院长春光学精密机械与物理研究所 | Measuring device and measuring method for relative deflection of primary mirror and secondary mirror |
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