CN112363321B - Rectangular field diaphragm installation alignment device and method for coaxial optical system - Google Patents
Rectangular field diaphragm installation alignment device and method for coaxial optical system Download PDFInfo
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- CN112363321B CN112363321B CN202011286046.6A CN202011286046A CN112363321B CN 112363321 B CN112363321 B CN 112363321B CN 202011286046 A CN202011286046 A CN 202011286046A CN 112363321 B CN112363321 B CN 112363321B
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Abstract
The invention relates to the technical field of aerospace optics, and provides a device and a method for mounting and aligning a rectangular field diaphragm of a coaxial optical system, wherein the device comprises: the device comprises a platform, a collimator, a theodolite, an image acquisition system, a detector supporting tool, a large target surface detector, an optical system installation reference tool, an optical system and a cubic prism, wherein the collimator, the theodolite, the image acquisition system, the detector supporting tool, the large target surface detector, the optical system installation reference tool and the cubic prism are fixed on a five-dimensional detector adjusting frame; the invention discloses a device and a method for installing and aligning a rectangular field diaphragm of a coaxial optical system, which can realize the accurate alignment of the rectangular field diaphragm at the primary image surface of a primary mirror and a secondary mirror of the coaxial optical system.
Description
Technical Field
The invention relates to the technical field of aerospace optics, in particular to a device and a method for mounting and aligning a rectangular field diaphragm of a coaxial optical system.
Background
With the gradual development of the aerospace optical system load towards the light-weight high-rigidity high-stability direction, the coaxial optical system is widely applied to the aerospace optical load, both the coaxial all-trans optical system and the coaxial catadioptric optical system generally comprise two-mirror optical systems (namely, a primary mirror and a secondary mirror), in order to inhibit stray light outside a field of view of the optical system, a field diaphragm is generally arranged at a primary image surface of the two-mirror optical systems, and the stray light outside the field of view can be inhibited from entering an imaging field of view under the action of the field diaphragm, so that the signal-to-noise ratio of the optical system is improved. The field stops are typically placed before and after the central aperture of the primary mirror. Since the detector of the optical system is generally rectangular, and the corresponding optical system field of view is rectangular, the field stop is also rectangular in shape for higher suppression of stray radiation of the optical system. The field diaphragm is positioned on the primary image surface of the primary mirror and the secondary mirror of the coaxial system, the primary image surface and the detector image surface have corresponding conjugate relation, if the alignment problem of the field diaphragm and the detector is not solved, stray light outside the field can be introduced to enter the imaging field of the detector, and edge edges of the field diaphragm can be imaged on the detector, so that the image of the field diaphragm is generated, and the imaging of the optical system on a target is influenced.
Therefore, the invention provides a device and a method for installing and aligning the rectangular field diaphragm of the coaxial optical system, which can solve the problem of accurate alignment of the rectangular field diaphragm at the primary image surface of the primary mirror and the secondary mirror of the coaxial optical system.
Disclosure of Invention
In view of the above problems, the present invention is to design a device and a method for mounting and aligning a rectangular field stop of a coaxial optical system, which can solve the problem of precise alignment of the rectangular field stop at the primary image plane of a primary mirror and a secondary mirror of the coaxial optical system. After the field diaphragm is aligned, stray radiation outside the field of view can be better inhibited from entering the optical system, and therefore the imaging quality of the optical system is improved. The rectangular field diaphragm of the coaxial optical system needs to be installed and aligned with high precision, and the installation alignment device of the field diaphragm and the optical system reference is set up, so that the field diaphragm installation alignment device is simple, the operability is higher, and the batch assembly and adjustment of products are easy to realize.
In order to achieve the purpose, the invention adopts the following specific technical scheme:
a method for installing and aligning a rectangular field diaphragm of a coaxial optical system comprises the following steps:
s1, arranging a collimator, an optical system capable of being adjusted in three-dimensional direction, a large target surface detector capable of being adjusted in horizontal, vertical and pitching positions, a theodolite and an image acquisition system in sequence according to the light path;
s2, aligning the theodolite to at least two different side surfaces of a cubic prism on the reference surface of the optical system, and adjusting the three-dimensional orientation of the optical system according to the returned image to indirectly align the optical axes of the collimator and the optical system;
s3, adjusting the horizontal, vertical and pitching positions of the large target surface detector to enable the optical system and the large target surface detector to be aligned and level in the rotating direction around the optical axis;
s4, adjusting the view field diaphragm according to the pixel point coordinates of the four edge positions of the image of the view field diaphragm on the large target surface detector acquired by the image acquisition system until the abscissa of the pixel point corresponding to the horizontal linear array image point ab of the view field diaphragm on the large target surface detector is the same, the ordinate of the pixel point corresponding to the image point ef on the vertical linear array is the same, and the positions of the corresponding pixel points from the central pixel point of the star point image are the same.
Preferably, in step S1, the collimator, the optical system, and the theodolite height are adjusted to be coaxial.
Preferably, step S2 specifically includes:
s201, changing the collimator tube into a cross target, aiming the cross target of the collimator tube by using a theodolite, and adjusting the azimuth and the pitching of the theodolite to enable a cross wire of the theodolite to coincide with a cross wire of the collimator tube;
s202, aligning a return image of a cross hair of the theodolite after being reflected by a cubic prism by using a cubic prism on a reference tool of a theodolite aiming optical system with the cross hair of the theodolite;
s203, rotating the azimuth turntable by 90 degrees in the horizontal direction, aiming at one side surface of the cubic prism by using the theodolite, and aligning a return image of the cross hair of the theodolite after being reflected by the cubic prism with the cross hair of the theodolite;
s204, rotating the azimuth turntable by 90 degrees in the opposite direction in the horizontal direction, namely returning to the initial position, and confirming whether a return image of a cross hair of the theodolite after being reflected by a cubic prism is aligned with the cross hair of the theodolite; if not, repeating the steps S202 and S203 until the return images of the cross hairs of the theodolite in the two directions after being reflected by the cube prism are aligned with the cross hairs of the theodolite.
Preferably, step S3 specifically includes:
s301, changing the collimator target into a star point target, and finding the clearest and brightest position of a star point image on the focal plane of a large target surface detector; rotating the azimuth turntable to enable the star point images to be imaged at different positions of the large target surface detector respectively, namely an on-axis image point and an off-axis image point;
s302, acquiring the mass center positions of the star image points at different horizontal positions of the image surface through an image acquisition system, reading the abscissa of the mass center positions and judging whether the abscissas are the same; repeating S302 until the abscissa is the same if the adjusting frame is adjusted in different directions of rotating around the optical axis;
s303, acquiring the mass center positions of the star image points at different vertical positions of the image surface through an image acquisition system, reading the vertical coordinates of the mass center positions and judging whether the vertical coordinates are the same; repeating S303 until the ordinate is the same as the optical axis rotation direction of the adjusting frame.
Preferably, step S4 specifically includes:
s401, changing a collimator target into a bright-field large-size discrimination plate target, and enabling all images of a field diaphragm to be imaged on a focal plane of a large target surface detector;
s402, selecting an image point position ab on the horizontal linear array as a horizontal adjustment reference, selecting an image point position ef on the vertical linear array as a vertical adjustment reference, and obtaining pixel point coordinates of four edge positions of an image of a field diaphragm on the large target surface detector through the detector image acquisition system;
and S403, adjusting the position of the field diaphragm according to the difference of the pixel coordinate points until the abscissa of the pixel point corresponding to the horizontal linear array image point ab of the field diaphragm on the large target surface detector is the same, the ordinate of the pixel point corresponding to the image point ef on the vertical linear array is the same, and the position of the corresponding pixel point from the central pixel point of the star point image is consistent, so that the field diaphragm is accurately aligned.
A rectangular field stop mount alignment apparatus of a coaxial optical system, comprising: the device comprises a collimator, an optical system capable of being adjusted in a three-dimensional direction, a large target surface detector capable of being adjusted in a horizontal, vertical and pitching position, an optical reference tool, a theodolite and an image acquisition system which are sequentially arranged according to a light path; the theodolite is used for aligning any two mutually perpendicular surfaces of a cubic prism on the optical reference tool, and adjusting the three-dimensional direction of the optical system according to the returned image to indirectly align the optical axes of the collimator and the optical system; the large target surface detector is fixed on the adjusting frame, the detector supporting tool is fixed on the adjusting frame, and the adjusting frame is used for adjusting the horizontal, vertical and pitching positions of the large target surface detector, so that the optical system and the large target surface detector are aligned and leveled in the rotating direction around the optical axis; the optical reference tool is fixed on the azimuth and elevation adjusting table, and the azimuth and elevation adjusting table is fixed on an azimuth turntable used for rotating in the horizontal direction, so that the optical system can adjust the three-dimensional azimuth; a detector supporting tool is also fixed on the optical reference tool; the image acquisition system is used for acquiring pixel point coordinates of four edge positions of an image of the field diaphragm on the large target surface detector, adjusting the field diaphragm until the abscissa of a pixel point corresponding to a horizontal linear array image point ab of the field diaphragm on the large target surface detector is the same, the ordinate of a pixel point corresponding to an image point ef on a vertical linear array is the same, and the positions of the corresponding pixel points away from a central pixel point of a star point image are the same.
Preferably, the aperture of the collimator covers the aperture of the primary mirror; the light of the bright field large-size discrimination plate target of the collimator tube after being emitted by the collimator tube covers the full aperture of the optical system; the target surface of the large target surface detector is larger than the field of view imaged by the field-of-view diaphragm, so that the images of the field-of-view diaphragm are all imaged on the focal plane of the large target surface detector.
Preferably, the combination of the selected adjustment reference may be any combination of an image point position ab on the horizontal linear array, an image point gh on the vertical linear array, an image point position cd on the horizontal linear array, an image point ef on the vertical linear array, an image point position cd on the horizontal linear array, and an image point gh on the vertical linear array.
Preferably, the device for installing and aligning the rectangular field diaphragm of the coaxial optical system further comprises a platform, and the collimator, the azimuth turntable, the theodolite and the detector image acquisition system are respectively fixed on the platform.
The invention can obtain the following technical effects:
1. stray radiation outside a field of view is inhibited from entering the optical system, so that the imaging quality of the optical system is improved;
2. the field diaphragm mounting and aligning device is simple, has stronger operability and is easy to realize the batch assembly and adjustment of products.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a rectangular field stop mounting and aligning device of a coaxial optical system according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of an optical system according to a first embodiment of the present invention;
FIG. 3 is a schematic view of field stop image plane imaging according to the first embodiment of the present invention;
fig. 4 is a schematic flow chart of a rectangular field stop installation alignment method of a coaxial optical system according to an embodiment of the present invention.
Wherein the reference numerals include:
the device comprises a platform 1, a collimator 2, a secondary mirror 3, a field stop 4, a primary mirror 5, a rear optical assembly 6, a large target surface detector 7, a data transmission line 8, an azimuth turntable 9, a cubic prism 10, an azimuth and elevation adjusting table 11, an optical system reference tool 12, a five-dimensional detector adjusting frame 13, a detector supporting tool 14, a theodolite 15, an image acquisition system 16, an optical system 17, an image 18 of the field stop on the detector, and a star point image 19.
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 rectangular field stop installation alignment device and method of the coaxial optical system provided by the invention will be described in detail through specific embodiments.
The first embodiment is as follows:
as shown in fig. 1 to 3, a collimator 2, an azimuth turntable 9, a theodolite 15 and an image acquisition system 16 are sequentially arranged on a platform 1; the mounting surface of the orientation rotary table 9 is parallel to the platform 1, an orientation and pitching adjusting table 11 is arranged on the mounting surface, the orientation rotary table 9 can rotate by taking the orientation rotary table as an axis, and the orientation and pitching adjusting table 11 can move on a two-dimensional plane where the mounting surface is located and can also adjust an included angle with the two-dimensional plane where the mounting surface is located; the optical system reference tool 12 is of an inverted T-shaped or L-shaped structure, and the mounting surface of the optical system reference tool is fixed on the azimuth and elevation adjusting table 11; the optical system 17 vertically penetrates through a surface vertical to the installation surface of the optical system reference tool 12 and is fixed; the five-dimensional detector adjusting frame 13 is vertically fixed on the mounting surface of the optical system reference tool 12, and the large target surface detector 7 is fixed on the five-dimensional detector adjusting frame 13 through the detector supporting tool 14, so that the relative positions of the optical system 17 and the large target surface detector 7 can be adjusted.
In one embodiment of the invention, as shown in fig. two, the optical system 17 is divided into two sides by the azimuth and elevation adjusting stage 11, and the secondary mirror 3, the field stop 4 and the primary mirror 5 are arranged on one side of the collimator 2 and the rear optical component 6 is arranged on the other side by taking the surface of the azimuth and elevation adjusting stage 11 perpendicular to the installation surface as a boundary.
Example two:
fig. 4 shows a flow of the rectangular field stop installation alignment method of the coaxial optical system according to the second embodiment of the present invention.
As shown in fig. 4, the method for mounting and aligning the rectangular field stop of the coaxial optical system according to the second embodiment of the present invention includes the following steps:
and S1, adjusting to enable the collimator, the optical system and the theodolite to be coaxial.
And S2, realizing the coaxiality of the optical system and the collimator by using the installation reference of the optical system led out by the cubic prism.
And S3, adjusting the large target surface detector to ensure that the optical system and the large target surface detector are aligned and leveled in the rotating direction around the optical axis.
And S4, adjusting the position of the field diaphragm 4 according to the difference of the pixel coordinates until the horizontal coordinate or the vertical coordinate of the corresponding pixel point on the horizontal adjustment reference and the vertical adjustment reference are the same and the position of the corresponding pixel point from the central pixel point of the star point image is consistent, and finishing the alignment of the field diaphragm 4.
With reference to fig. 1-3, the optical system 17 images the parallel light emitted by the collimator 2 on an image plane of the optical system 17, the image plane is located near a central opening of the primary mirror 5, a field stop 4 is arranged near the central opening of the primary mirror 5 for suppressing stray light of an off-axis field, and light passes through the field stop 4 and then is converged to the large target surface detector 7 through the rear group of optical systems 6, so that light convergence and collection are realized; the image acquisition system 16 of the detector is used for acquiring the pixel point coordinates of the four corner positions of the image 18 of the field diaphragm 4 on the large target surface detector 7, and the position of the field diaphragm 4 is adjusted according to the difference of the pixel coordinate points to realize the accurate alignment of the field diaphragm 4.
The specific steps of the method are described with reference to fig. 3:
firstly, arranging a collimator 2, an optical system 17 and a theodolite 15 in sequence at a proper position on a platform 1, and roughly adjusting the heights of the collimator 2, the optical system 17 and the theodolite 15 to be equal to each other, wherein the aperture of the collimator 2 covers the aperture of a primary mirror 5; the optical system 17 is fixed by the optical system reference tool 12, the azimuth and elevation adjusting table 11 and the azimuth turntable 9, so that the optical system 17 can be adjusted in three rotating directions;
step two, the collimator 2 is changed into a cross target, the theodolite 15 is used for aiming at the cross target of the collimator 2, the direction and the pitching of the theodolite 15 are adjusted, and the cross wire of the theodolite 15 is coincided with the cross wire of the collimator 2;
thirdly, aiming at the cubic prism 10 on the optical system reference tool 12 by using the theodolite 15, and aligning a return image of a cross wire of the theodolite 15 after being reflected by the cubic prism 10 with the cross wire of the theodolite 15 by adjusting the azimuth and pitching adjusting table 11 and the azimuth turntable 9 at the bottom of the optical system 17, wherein the cubic prism 10 and the optical system 17 are both arranged on the optical system reference tool 12, and the position of the cubic prism 10 is close to the optical system 17 and is as high as the optical system 17 and the theodolite 15, so that the cubic prism 10 can be ensured to lead out the installation reference of the optical system 17;
rotating the azimuth turntable 9 by 90 degrees in the horizontal direction, aiming at one side surface of the cubic prism 10 by using the theodolite 15, and aligning a return image of the cross hairs of the theodolite 15 after being reflected by the cubic prism 10 with the cross hairs of the theodolite 15 by adjusting the azimuth and pitching adjusting table 11 and the azimuth turntable 9;
and step five, rotating the azimuth turntable 9 by 90 degrees in the opposite direction in the horizontal direction, namely returning to the initial position, and confirming whether a return image of the cross hair of the theodolite 15 after being reflected by the cubic prism 10 is aligned with the cross hair of the theodolite 15. If not, repeating the steps S3 and S4 until the return images of the cross hairs of the theodolite 15 in the two directions after being reflected by the cubic prism 10 are aligned with the cross hairs of the theodolite 15; the coaxiality of the collimator 2 and the optical system 17 is indirectly realized through the adjustment of the installation reference of the optical system 17 led out of the square prism 10;
sixthly, mounting the large target surface detector 7 on a five-dimensional detector adjusting frame 13, and enabling the large target surface detector 7 to be coaxial with the optical system 17 by adjusting the five-dimensional detector adjusting frame 13;
step seven, changing the collimator 2 target into a star point target, imaging the star point on a focal plane of the large target surface detector 7 after passing through the collimator 2 and the optical system 17, and adjusting the focal plane position of the large target surface detector 7 to ensure that a star point image 19 is clearest and bright; the azimuth turntable 9 is rotated to enable the star point images 19 to be respectively imaged at different positions of the large target surface detector 7, namely the clearest and bright star point image 19 is an on-axis image point and the other points are off-axis image points;
more specifically, the image acquisition system 16 is used for acquiring the mass center positions of image points at different positions of an image surface, reading the coordinates of pixel points at the mass center positions of the image points on the shaft and the image points outside the shaft, and judging whether the pixel points are in the same row of the image surface, namely judging whether the directions of the rotation around the optical axis of the optical system 17 and the large target surface detector 7 are consistent, if the pixel abscissa of the mass center positions of the image points on the shaft and outside the shaft are different, the large target surface detector 7 has an error in the direction of the rotation around the optical axis relative to the optical system 17, the direction of the rotation around the optical axis of the five-dimensional detector adjusting frame 13 below the large target surface detector 7 needs to be adjusted, and the measurement process is repeated after the adjustment until the abscissa of the pixel coordinates of the image points on the shaft and the image points outside the shaft on the large target surface detector 7 are consistent, so that the optical system;
similarly, the mass centers of the on-axis image point and the off-axis image point are aligned and leveled in the vertical direction of the linear array of the large target surface detector 7 by adjusting the five-dimensional detector adjusting frame 13;
at this time, the adjustment of the optical system 17 and the large target surface detector 7 is completed so that the optical system 17 is aligned flush with the large target surface detector 7.
Step eight, changing the collimator 2 target into a bright-field large-size discrimination plate target, and covering the full aperture of the optical system 17 after the bright-field large-size discrimination plate target is emitted by the collimator 2, wherein the target surface of the large target surface detector 7 is larger than the imaging field of the field diaphragm 4, and the image of the field diaphragm 4 is imaged on the focal plane of the large target surface detector 7; the data transmission line 8 is connected with the image acquisition system 16, the image acquisition system 16 is used for measuring pixel coordinate positions (shown in figure 3) of four edge positions of an image 18 of a field diaphragm on the large target surface detector 7 on the detector, an image point position ab on the horizontal linear array can be selected as a horizontal adjustment reference, and an image point position ef on the vertical linear array can be selected as a vertical adjustment reference; the combination of the selected adjustment criteria can be any combination of ab and ef, ab and gh, cd and ef, cd and gh.
In order to judge whether the installation of the field stop 4 is aligned and leveled, only two points on a horizontal linear array and two points on a vertical linear array need to be selected arbitrarily, the adjustment amount and the adjustment direction of the field stop 4 are judged according to the pixel coordinate difference of four corner positions of the field stop image 18, then the position of the field stop 4 is adjusted according to the pixel coordinate difference, and the accurate alignment of the field stop 4 is realized when the edge image of the field stop 4 on the large target surface detector 7, namely the abscissa of the corresponding pixel point on the selected horizontal adjustment reference is the same, the ordinate of the corresponding pixel point on the selected vertical adjustment reference is the same, and the position of the corresponding pixel point from the central pixel point of the star point image 19 is the same.
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 (4)
1. A method for installing and aligning a rectangular field diaphragm of a coaxial optical system is characterized by comprising the following steps:
s1, arranging a collimator (2), an optical system (17) capable of being adjusted in three-dimensional direction, a large target surface detector (7) capable of being adjusted in horizontal, vertical and pitching positions and rotated and adjusted around the optical axis direction, a theodolite (15) and an image acquisition system (16) in sequence according to the optical path; adjusting the heights of the collimator (2), the optical system (17) and the theodolite (15) to be coaxial;
the optical system (17) is fixed through an optical system reference tool (12), an azimuth and elevation adjusting table (11) and an azimuth turntable (9), and the optical system (17) can be adjusted in three rotating directions;
s2, aligning the theodolite (15) to any two mutually perpendicular surfaces of a cubic prism (10) of an optical system reference tool (12), and adjusting the three-dimensional orientation of the optical system (17) according to a returned image to indirectly align the optical axes of the collimator (2) and the optical system (17);
the optical system reference tool comprises an optical system reference tool (12), a cubic prism (10), an optical system (17), a theodolite (15), an optical system (17), a theodolite (10) and a reference device, wherein the cubic prism (10) and the optical system (17) are both arranged on the optical system reference tool (12), the installation position of the cubic prism (10) is close to the optical system (17) and is as high as the optical system (17) and the theodolite (15), and the cubic prism;
step S2 specifically includes:
s201, changing a collimator (2) target into a cross target, aiming the cross target of the collimator (2) by using a theodolite (15), and adjusting the azimuth and the pitch of the theodolite (15) to enable cross threads of the theodolite (15) to be overlapped with cross threads of the collimator (2);
s202, aiming at a cubic prism (10) on a reference tool (12) of the optical system by using a theodolite (15), adjusting the bottom direction and pitching adjusting table (11) and a direction rotating table (9) of the optical system (17), and aligning a return image of a cross hair of the theodolite (15) after being reflected by the cubic prism (10) with the cross hair of the theodolite (15);
s203, rotating the azimuth turntable (9) by 90 degrees in the horizontal direction, aiming at one side surface of the cubic prism (10) by using the theodolite (15), adjusting the bottom azimuth and pitch adjusting table (11) and the azimuth turntable (9) of the optical system (17), and aligning a return image of cross hairs of the theodolite (15) after being reflected by the cubic prism (10) with the cross hairs of the theodolite (15);
s204, rotating the azimuth turntable (9) by 90 degrees in the opposite direction in the horizontal direction, namely returning to the initial position, and confirming whether a return image of a cross hair of the theodolite (15) after being reflected by the cubic prism (10) is aligned with the cross hair of the theodolite (15) or not again; if not, repeating the steps S202 and S203 until the return images of the cross hairs of the theodolite (15) in the two directions after being reflected by the cubic prism (10) are aligned with the cross hairs of the theodolite (15);
s3, adjusting the horizontal, vertical and pitching positions of the large target surface detector (7) and the rotating position around the optical axis direction to enable the optical system (17) and the large target surface detector (7) to be aligned and level around the optical axis rotating direction;
step S3 specifically includes:
s301, changing the collimator (2) target into a star point target, and finding the clearest and brightest position of a star point image (19) on the focal plane of a large target surface detector (7); rotating the azimuth turntable (9) to enable the star point images (19) to be imaged at different positions of the large target surface detector (7) respectively, namely on-axis image points and off-axis image points;
s302, acquiring the mass center positions of the star point images (19) at different horizontal positions of the image surface through an image acquisition system (16), reading the abscissa of the mass center positions and judging whether the abscissas are the same or not; if the difference is different, the rotating direction around the optical axis of the five-dimensional detector adjusting frame (13) is adjusted, and S302 is repeated until the abscissa is the same;
s303, acquiring the centroid positions of the star point images (19) at different vertical positions of the image surface through the image acquisition system (16), reading the vertical coordinates of the centroid positions and judging whether the vertical coordinates are the same; if the two-dimensional detector is different, the rotating direction of the five-dimensional detector adjusting frame (13) around the optical axis is adjusted, and S303 is repeated until the vertical coordinates are the same;
the large target surface detector (7) is fixed on a five-dimensional detector adjusting frame (13) through a detector supporting tool (14), the five-dimensional detector adjusting frame (13) is vertically fixed on the mounting surface of an optical system reference tool (12), and the relative positions of an optical system (17) and the large target surface detector (7) are adjustable;
s4, adjusting the view field diaphragm (4) according to the pixel point coordinates of the four edge positions of the image (18) of the view field diaphragm on the large target surface detector (7) acquired by the image acquisition system (16) until the abscissa of the pixel point corresponding to the horizontal linear array image point of the view field diaphragm (4) on the large target surface detector (7) is the same, the ordinate of the pixel point corresponding to the image point on the vertical linear array is the same, and the positions of the corresponding pixel point from the central pixel point of the star point image (19) are the same;
step S4 specifically includes:
s401, changing a collimator (2) target into a bright-field large-size discrimination plate target, and enabling all images of a field diaphragm (4) to be imaged on a focal plane of a large target surface detector (7);
s402, selecting the image point positions on the horizontal linear array as a horizontal adjustment reference, selecting the image point positions on the vertical linear array as a vertical adjustment reference, and obtaining pixel point coordinates of four edge positions of an image (18) of a field diaphragm on the large target surface detector (7) through an image acquisition system (16);
s403, adjusting the position of the field diaphragm (4) according to the difference of the pixel point coordinates until the abscissa of the pixel point corresponding to the horizontal line array pixel point of the field diaphragm (4) on the large target surface detector (7) is the same, the ordinate of the pixel point corresponding to the pixel point on the vertical line array is the same, and the position of the corresponding pixel point from the central pixel point of the star point image (19) is the same, so that the accurate alignment of the field diaphragm (4) is realized.
2. An alignment apparatus of the rectangular field stop mount alignment method of the coaxial optical system according to claim 1, comprising: the device comprises a collimator (2) arranged in sequence according to a light path, an optical system (17) capable of being adjusted in a three-dimensional direction, a large target surface detector (7) capable of being adjusted in a horizontal position, a vertical position and a pitching position and rotated and adjusted around an optical axis direction, a theodolite (15) and an image acquisition system (16).
3. The rectangular field stop installation alignment method of the coaxial optical system according to claim 1, wherein the aperture of the collimator (2) covers the aperture of the primary mirror (5) of the optical system (17); the light of the bright field large-size discrimination plate target of the collimator (2) after being emitted by the collimator (2) covers the full aperture of the optical system (17); the target surface of the large target surface detector (7) is larger than the imaging field of the field diaphragm (4), so that the images of the field diaphragm (4) are all imaged on the focal plane of the large target surface detector (7).
4. The alignment device of claim 2, further comprising: the platform (1), the collimator (2), the azimuth turntable (9), the theodolite (15) and the image acquisition system (16) are respectively fixed on the platform (1).
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| CN102288137A (en) * | 2011-07-06 | 2011-12-21 | 中国兵器工业第二○五研究所 | Device for calibrating multi-spectral axis calibrator with discrete optical axis |
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| CN109443332A (en) * | 2018-12-11 | 2019-03-08 | 河北汉光重工有限责任公司 | A kind of laser measurement method of the anti-monitoring turntable shafting orthogonality in land |
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| US4117319A (en) * | 1977-07-05 | 1978-09-26 | Rockwell International Corporation | Alignment system for lasers |
| CN102288137A (en) * | 2011-07-06 | 2011-12-21 | 中国兵器工业第二○五研究所 | Device for calibrating multi-spectral axis calibrator with discrete optical axis |
| CN108956099A (en) * | 2018-07-21 | 2018-12-07 | 胡林亭 | The method of two transits measurement multiband system optical axis consistency |
| CN109443332A (en) * | 2018-12-11 | 2019-03-08 | 河北汉光重工有限责任公司 | A kind of laser measurement method of the anti-monitoring turntable shafting orthogonality in land |
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