CN115016089A - Rapid light path alignment method for split building block reflective schlieren instrument - Google Patents
Rapid light path alignment method for split building block reflective schlieren instrument Download PDFInfo
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- CN115016089A CN115016089A CN202210947779.2A CN202210947779A CN115016089A CN 115016089 A CN115016089 A CN 115016089A CN 202210947779 A CN202210947779 A CN 202210947779A CN 115016089 A CN115016089 A CN 115016089A
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Abstract
The invention discloses a quick light path alignment method for a split building block reflective schlieren instrument, and relates to the technical field of wind tunnel schlieren instruments; a quick light path alignment method for a split building block reflection type wind tunnel schlieren instrument comprises the following steps: step one, arranging a line projector in an observation section of a wind tunnel; step two, respectively enabling the central axes of the first primary mirror and the second primary mirror to be respectively superposed with the central axes of the side windows; adjusting the deviation angles of the first primary mirror and the second primary mirror; step four, reversely adjusting the light source slit condensing system; step five, reversely adjusting the knife edge imaging system; step six, switching the schlieren light source into a continuous laser, and adjusting a light source slit condensing system by the aid of the continuous laser to enable the first main mirror to project collimated light; and step seven, switching the continuous laser into a schlieren light source, and verifying the imaging effect. The method has the advantages of high accuracy, high reliability and high adjustment efficiency.
Description
Technical Field
The invention relates to the technical field of wind tunnel schlieren instruments, in particular to a quick light path alignment method for a split building block reflection type schlieren instrument.
Background
A volumetric wood wind tunnel schlieren instrument generally comprises four relatively independent subsystems: the device comprises a light source slit light-gathering system, a collimation main reflector system, a schlieren main reflector system and a knife edge imaging system. The four subsystems are installed on the four mobile operation platforms and are respectively arranged on two sides of the wind tunnel test section, one side of each subsystem is a receiving end, and the other side of each subsystem is a transmitting end.
When a wind tunnel test is carried out, measuring stations of the schlieren instrument need to be switched among a plurality of groups of observation windows, once the measuring stations are changed, the four subsystems need to be moved and pose adjusted once, and the light path needs to be repositioned and aligned, so that the imaging system can obtain clear schlieren images. The traditional adjusting method is adopted to carry out light path positioning and alignment, the problems of heavy and complicated adjusting work, overlong required time, higher requirements on professional knowledge and experience of operators and the like exist, a large amount of debugging time of the operators is occupied, the operators are difficult to adjust to the optimal state, and the schlieren observation quality and the working efficiency are seriously influenced.
The difficulty of the traditional method for analyzing the light path debugging of the split building block type schlieren instrument in the light path alignment process mainly comprises the following two points: firstly, the schlieren instrument has numerous optical components, high adjustment freedom degree and close association, and once the position of a certain component is changed, all the components need to be readjusted to be aligned; secondly, when the primary mirror is aligned, the edge covered by the light spot can be observed by naked eyes, and particularly in a place covered by strong light, the condition of covering the light spot cannot be judged quickly and accurately without assistance.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages described hereinafter.
To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, there is provided a method for quickly aligning an optical path of a reflection-type schlieren instrument of a split block type, comprising the steps of:
step one, arranging a line projector in an observation section of a wind tunnel, and projecting bidirectional coaxial cross lasers to two sides by using the line projector to indicate central axes of windows at two sides of the observation section;
step two, respectively adjusting a first primary mirror and a second primary mirror to enable the central axes of the first primary mirror and the second primary mirror to be respectively superposed with the central axes of the windows on each side;
thirdly, adjusting and locking the deviation angles of the first primary mirror and the second primary mirror through the auxiliary observation of a cross laser;
step four, reversely adjusting a light source slit condensing system by using the cross laser to ensure that the central axis of the light source slit condensing system is superposed with the reflected light of the first primary mirror;
fifthly, reversely adjusting the knife edge imaging system by using the cross laser to ensure that the central axis of the knife edge imaging system is superposed with the reflected light of the second primary mirror;
step six, switching the schlieren light source into a continuous laser, and adjusting the light source slit light-gathering system by the aid of the continuous laser to enable the first main mirror to project collimated light;
and seventhly, switching the continuous laser into a schlieren light source, and verifying the imaging effect.
Preferably, the method for indicating the central axes of the windows at two sides of the observation section by using the cross laser comprises the following steps: the inner sides of window frames of the windows are respectively provided with four first marks in a cross shape, the line projector is erected in the observation section through an adjustable triangular support frame, the spatial position of the line projector is adjusted through the triangular support frame, and the line projector projects bidirectional coaxial cross laser to two sides and the four first marks of the windows on the two sides are overlapped.
Preferably, the method of causing the central axes of the first and second main mirrors to coincide with the central axis of the window on each side is: the mirror frame of first primary mirror and second primary mirror is the cross respectively and is provided with four second marks, adjusts respectively first primary mirror and second primary mirror make each side the cross laser respectively with four second mark coincidence or the equidistance of first primary mirror and second primary mirror.
Preferably, the method for setting the cross laser comprises the following steps: the outer edges of the windows on all sides are provided with cross marks, after the first primary mirror and the second primary mirror are installed and adjusted for aligning light paths for the first time, the cross lasers are installed on the mirror frames of the first primary mirror and the second primary mirror through two-dimensional adjusting frames respectively, the two-dimensional adjusting frames are adjusted, cross light of each cross laser is enabled to be overlapped or equidistant with the corresponding cross mark, and each two-dimensional adjusting frame is locked after being adjusted in place.
Preferably, the method for adjusting the first primary mirror and the second primary mirror off-angle comprises: adjusting the vertical deflection of the first main mirror and the second main mirror respectively to enable the vertical line of each cross light to be coincident with or equidistant to the vertical line of each cross mark, so as to adjust the deviation angle of the first main mirror and the second main mirror in the pitching direction; and adjusting the left and right deflection of the first main mirror and the second main mirror to enable the horizontal line of each crossed light ray to be coincident with or equidistant to the horizontal line of each cross mark, so as to adjust the deviation angle of the first main mirror and the second main mirror in the yaw direction.
Preferably, the continuous laser adopts a fiber coupled light source, the coupled fiber can be shared with the schlieren light source, and the continuous laser can generate clearly visible conical laser at the end of the coupled fiber.
Preferably, the method for adjusting the slit condensing system of the light source by the continuous laser is as follows: and starting the continuous laser, wherein the light spot of the continuous laser completely covers the mirror surface of the first primary mirror, the light spot is reflected by the first primary mirror and then projects a circular light spot with clear edge on the mirror surface of the second primary mirror, and the light source slit condensing system is integrally adjusted to translate back and forth, so that the diameter of the circular light spot is equal to the effective aperture of the mirror surface of the second primary mirror.
Preferably, the method for adjusting the light source slit condensing system reversely comprises the following steps:
after the cross laser on one side is irradiated on the first main mirror, the cross laser is reflected to the light source slit condensing system and condensed, the condensed cross laser on one side can be observed near the slit of the light source slit condensing system, and the center of the cross laser on one side is coincided with the central axis of the slit by integrally adjusting each degree of freedom of the light source slit condensing system.
Preferably, the method for adjusting the knife-edge imaging system reversely comprises the following steps:
and after irradiating the cross laser on the other side onto the second main mirror, reflecting and condensing the cross laser to the direction of the knife edge imaging system, and enabling the cross laser on the other side to enter the knife edge by integrally adjusting each degree of freedom of the knife edge imaging system.
The invention at least comprises the following beneficial effects:
firstly, in the invention, in order to ensure that the parallel light energy between the first main mirror and the second main mirror can completely pass through the observation windows at the two sides of the wind tunnel without being shielded by the observation windows, the centers of the first main mirror and the second main mirror are respectively adjusted to the central axis of the observation windows through the line projector, the first mark and the second mark, so that the parallel light optical axes of the first main mirror and the second main mirror are respectively superposed with the central axis of the observation windows, and the invention has the advantages of high accuracy, strong reliability and high adjustment efficiency.
Secondly, after the line projector is used for auxiliary positioning, the deviation angles of the main mirror in the horizontal direction and the vertical direction are repeatedly positioned by adjusting the superposition of the cross light and the cross mark, so that the optical axis of the parallel light of the main mirror can be completely superposed with the central axis of the observation window, and the method has the advantages of high accuracy, strong reliability and high adjustment efficiency.
Thirdly, in the invention, the front and back positions of the light source slit condensing system are integrally adjusted, so that the light generated after being reflected by the first main mirror is parallel light, and the invention has the advantages of high accuracy, strong reliability and high adjustment efficiency.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a flow chart of the present invention.
Fig. 2 is a schematic diagram of a conventional layout of the split building block reflective wind tunnel schlieren instrument.
Fig. 3 is a schematic view of the installation of the level of the present invention.
FIG. 4 is a schematic diagram of four first labels of the present invention.
FIG. 5 is a schematic view of the cross mark of the present invention.
FIG. 6 is a schematic diagram of four second labels of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text. It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof. It is to be understood that in the description of the present invention, the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are used only for convenience in describing the present invention and for simplification of the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, unless otherwise specifically stated or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are used broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, or a communication between two elements, and those skilled in the art will understand the specific meaning of the terms in the present invention specifically. Further, in the present invention, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacted with the first and second features, or indirectly contacted with the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Example (b):
as shown in fig. 1, a method for quickly aligning an optical path of a split block reflective schlieren instrument includes the following steps:
step one, as shown in fig. 3, a line projector 2 is arranged in an observation section of a wind tunnel 1, and bidirectional coaxial cross lasers 21 are projected to two sides by the line projector 2 to indicate central axes of windows 11 on two sides of the observation section;
step two, respectively adjusting the first main mirror 31 and the second main mirror 32 to enable the central axes of the first main mirror 31 and the second main mirror 32 to be respectively superposed with the central axes of the windows 11 on each side;
step three, respectively adjusting and locking the deviation angles of the first primary mirror 31 and the second primary mirror 32 through the auxiliary observation of a cross laser;
step four, reversely adjusting the light source slit condensing system 4 by using the cross laser 21 to ensure that the central axis of the light source slit condensing system 4 is superposed with the reflected light of the first main mirror 31;
step five, reversely adjusting the knife edge imaging system 5 by using the cross laser 21 to ensure that the central axis of the knife edge imaging system 5 is superposed with the reflected light of the second main mirror 32;
step six, switching the schlieren light source into a continuous laser, and adjusting the light source slit condensing system 4 by the aid of the continuous laser to enable the first main mirror 31 to project collimated light;
and seventhly, switching the continuous laser into a schlieren light source, and verifying the imaging effect.
The schlieren system is in a split building block reflection type structure form due to the limitation of field working conditions, and is divided into four independent parts, namely a light source slit light condensing system 4, a first main mirror system 31, a second main mirror system 32, a knife edge and an imaging system 5, by adopting a Z-shaped light path layout (as shown in figure 2), wherein the four independent parts are arranged on four mobile operation tables and are respectively arranged at two sides of a wind tunnel test section, one side of a hall is a receiving end, and the other side of the hall is a transmitting end. Meanwhile, two groups of observation windows of a high window A and a low window B are arranged on the site, the horizontal distance between the circle centers of the two windows is about 1370mm, the vertical height difference is about 153mm, different tests are carried out, the observation windows 11 are selected and observed differently, the schlieren system needs to take both the two into consideration, and free switching can be carried out at the positions of the two windows 11.
In the above embodiment, the method for indicating the central axes of the windows 11 on both sides of the observation section by using the cross laser 21 is as follows: the inner sides of the window frames of the windows 11 are respectively provided with four first marks 12 in a cross shape (as shown in fig. 4), the line projector 2 is erected in the observation section through an adjustable triangular support frame, and the spatial position of the line projector 2 is adjusted through the triangular support frame, so that the line projector 2 projects bidirectional coaxial cross lasers 21 to two sides to be coincided with the four first marks 12 of the windows 11 on the two sides.
In the above embodiment, the method of making the central axes of the first and second main mirrors 31 and 32 coincide with the central axes of the windows 11 on the respective sides is: the frame of the first main mirror 31 and the second main mirror 32 is respectively provided with four second marks 33 in a cross shape (as shown in fig. 6), and the first main mirror 31 and the second main mirror 32 are respectively adjusted to enable the cross laser 21 on each side to be respectively overlapped with or equidistant from the four second marks 33 of the first main mirror 31 and the second main mirror 32.
The demarcation device 2 is used for assisting the adjustment of the main mirror 3, so that the central axes of the first main mirror 31 and the second main mirror 32 are respectively superposed with the central axis of each side window 11. Four first marks 12 are respectively made on the edge of each window 11 on the inner side of the wind tunnel in the horizontal direction and the vertical direction. Four second marks 33 are formed on the rim of the first main mirror 31 and the rim of the second main mirror 32 in the horizontal direction and the vertical direction, respectively. The center of the window 11 and the centers of the first and second main mirrors 31 and 32 are positioned by the line projector and the first and second marks 12 and 33. The line projector 2 is placed between the windows 11 on two sides inside the wind tunnel 1 when in use. The two-way cross laser 21 emitted by the line projector 2 is coaxial, the central axis of the window 11 can be determined by coincidence of the cross laser 21 and the first mark 12, and then the first main mirror 31 and the second main mirror 32 are adjusted to respectively coincide or be equidistant between the second mark 31 on the mirror frame of the first main mirror 31 and the second main mirror 32 and the cross laser 21, so that the central axes of the first main mirror 31 and the second main mirror 32 can be considered to be coincident with the central axis of each side window 11 respectively.
In the above embodiment, the method for setting the cross laser includes: cross marks 13 (as shown in fig. 5) are formed on the outer edges of the windows 11 on each side, after the first main mirror 31 and the second main mirror 32 are initially installed and adjusted to align with the light paths, the cross lasers are respectively installed on the mirror frames of the first main mirror 31 and the second main mirror 32 through two-dimensional adjusting frames, the two-dimensional adjusting frames are adjusted, cross light of each cross laser is overlapped or equidistant with the corresponding cross mark 13, and the two-dimensional adjusting frames are locked after being adjusted in place.
In the above embodiment, the method for adjusting the deviation angles of the first main mirror 31 and the second main mirror 32 includes: adjusting the vertical deflection of the first and second main mirrors 31 and 32 to make the vertical line of each cross light coincide with or be equidistant from the vertical line of each cross mark 13, thereby adjusting the tilt angles of the first and second main mirrors 31 and 32 in the pitch and yaw directions; by adjusting the left-right deflection of the first main mirror 31 and the second main mirror 32, the horizontal line of each cross light is coincident with or equidistant from the horizontal line of each cross mark 13, so as to adjust the deflection angle of the first main mirror 31 and the second main mirror 32 in the yaw direction.
The cross laser is used for assisting in adjusting the deviation angles of the first main mirror 31 and the second main mirror 3 caused by rolling, after the alignment instrument 2 is assisted in positioning, the first main mirror 31 and the second main mirror 32 can have a relatively accurate fixed position in height, left and right, but the deviation angles caused by vertical and horizontal rolling generated by gaps and the like are also considered, the pitching direction and the yawing direction are mainly considered, and the influence of the rolling angle is not considered. The first main mirror 31 and the second main mirror 32 are provided with cross lasers respectively mounted on the mirror frames, and cross light rays are projected to coincide with the cross marks 13 on the outer sides of the side windows, so that the deviation angles of the first main mirror 31 and the second main mirror 32 in the horizontal direction and the vertical direction are repeatedly positioned.
In the above embodiment, the continuum laser uses a fiber coupled light source, a coupled fiber can be shared with a schlieren light source, and the continuum laser can generate a clearly visible tapered laser at the end of the coupled fiber.
In the above embodiment, the method for adjusting the light source slit condensing system 4 with the assistance of the continuous laser includes: and starting the continuous laser, wherein the light spot of the continuous laser completely covers the mirror surface of the first main mirror 31, the light spot is reflected by the first main mirror 31 and then projects a circular light spot with clear edge on the mirror surface of the second main mirror 32, and the light source slit light-gathering system 4 is integrally adjusted to translate back and forth, so that the diameter of the circular light spot is equal to the effective aperture of the mirror surface of the second main mirror 32.
The continuum laser is used to determine whether the light beam between the first main mirror 31 and the second main mirror 32 is parallel light and the projected spot size. According to the light path of the schlieren instrument, when the focal point of the light source of the slit surface is on the radial focal plane of the first main mirror 31, the first main mirror 31 can generate parallel light after projection, otherwise, the light beam can be converged or widened. The diameters of any positions of the parallel light beams are equal, and whether the light beams are parallel light can be judged by measuring the spot diameter of any section between the first main mirror 31 and the second main mirror 32. The continuous laser is a green conical laser light source with a good visual degree, and after the light source is installed, the optical axis of the light source is overlapped with the axis of the schlieren light source. The front and back positions of the light source slit condensing system 4 are adjusted by observing and measuring the diameter of the light spot projected by the laser source on the second main mirror 32, so that the light generated after being projected by the first main mirror 31 is parallel light.
In the above embodiment, the method for reversely adjusting the light source slit condensing system 4 includes:
after the cross laser 21 on one side is irradiated on the first main mirror 31, the cross laser 21 is reflected and condensed towards the light source slit condensing system 4, the condensed cross laser 21 on one side can be observed near the slit of the light source slit condensing system 4, and the center of the cross laser 21 on one side is coincided with the central axis of the slit by integrally adjusting each degree of freedom of the light source slit condensing system 4.
In the above embodiment, the method for adjusting the knife-edge imaging system 5 in the reverse direction is as follows:
and after irradiating the cross laser on the other side onto the second main mirror 32, reflecting and condensing the cross laser to the direction of the knife edge imaging system 5, and enabling the cross laser 21 on the other side to enter the knife edge by integrally adjusting each degree of freedom of the knife edge imaging system 5.
The movement adjustment of the light source slit condensing system 4 and the knife edge imaging system 5 respectively passes through a multi-degree-of-freedom adjusting table, and the parameters of each multi-degree-of-freedom adjusting table are as follows:
the moving range X direction moves 0-250 mm respectively, and the moving precision is as follows: 0.001 mm;
the moving range Y is 0-250 mm to the adjusting range, and the moving precision is as follows: 0.01 mm;
the moving range Z direction moves 0-200 mm respectively, and the moving precision is as follows: 0.005 mm;
the range of the yaw angle is +/-5 degrees, the speed ratio of the worm gear is 130:1, the adjusting precision is 0.0038 degrees, and the alignment error is 0.5mm when the adjusting resolution is 0.5 degrees;
the rolling/pitching angle range is +/-5 degrees, and when the resolution of the hand wheel is adjusted to be 0.5 degrees, the adjustment precision is 0.0018 degrees.
The adjustment parameters of each primary mirror 3 are:
the X-direction movement is completed by driving a first speed reducer through a first servo motor, and driving a screw rod to engage with a nut through the first speed reducer; the moving range is 0-1577 mm, and the moving precision is as follows: 0.015 mm; the adjustment error is 0.3 mm;
the Z-direction movement is completed by driving a second speed reducer through a second servo motor, and the second speed reducer drives a nut to lift; the moving range is 0-203 mm, and the moving precision is as follows: 0.01 mm; the adjustment error is 0.3 mm;
the up-down deflection adjustment is completed by driving a first worm turbine through a pitching adjusting hand wheel, the rotation precision of the pitching adjusting hand wheel is 0.5 degrees, the speed ratio of the first worm turbine is 260:1, the angle precision is 0.00192 degrees, and the alignment error is 0.99 mm;
the left-right deflection adjustment is completed by driving a second worm gear through a yaw adjusting hand wheel, the rotation precision of the yaw adjusting hand wheel is 0.5 degrees, the speed ratio of the second worm gear is 600:1, the angle precision is 0.00083 degrees, and the alignment error is 0.43 mm.
The effective aperture of each primary mirror is phi 800mm, and the effective aperture of each observation window is phi 810 mm.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (9)
1. A quick light path alignment method for a split building block reflective schlieren instrument is characterized by comprising the following steps of:
step one, arranging a line projector in an observation section of a wind tunnel, and projecting bidirectional coaxial cross lasers to two sides by using the line projector to indicate central axes of windows at two sides of the observation section;
step two, respectively adjusting a first primary mirror and a second primary mirror to enable the central axes of the first primary mirror and the second primary mirror to be respectively superposed with the central axes of the windows on each side;
thirdly, adjusting and locking the deviation angles of the first primary mirror and the second primary mirror through the auxiliary observation of a cross laser;
step four, reversely adjusting a light source slit condensing system by using the cross laser to ensure that the central axis of the light source slit condensing system is superposed with the reflected light of the first primary mirror;
step five, reversely adjusting the knife edge imaging system by using the cross laser to ensure that the central axis of the knife edge imaging system is superposed with the reflected light of the second primary mirror;
step six, switching the schlieren light source into a continuous laser, and adjusting the light source slit condensing system by the aid of the continuous laser to enable the first main mirror to project collimated light;
and seventhly, switching the continuous laser into a schlieren light source, and verifying the imaging effect.
2. The method for quickly aligning the light path of the reflection-type schlieren instrument of the split building block as claimed in claim 1, wherein the method for indicating the central axes of the windows at the two sides of the observation section by using cross laser comprises the following steps: the inner sides of window frames of the windows are respectively provided with four first marks in a cross shape, the line projector is erected in the observation section through an adjustable triangular support frame, the spatial position of the line projector is adjusted through the triangular support frame, and the line projector projects bidirectional coaxial cross laser to two sides and the four first marks of the windows on the two sides are overlapped.
3. The method for quickly aligning the optical path of the reflective schlieren instrument of the split building block as claimed in claim 1, wherein the method for making the central axes of the first and second primary mirrors coincide with the central axes of the windows on the respective sides comprises the following steps: four second marks are arranged on the mirror frames of the first primary mirror and the second primary mirror in a cross mode respectively, and the first primary mirror and the second primary mirror are adjusted respectively to enable the cross laser on each side to be coincided with or equidistant to the four second marks of the first primary mirror and the second primary mirror respectively.
4. The method for quickly aligning the light path of the reflection-type schlieren instrument of the split building block as claimed in claim 1, wherein the method for setting the cross laser comprises the following steps: the outer edges of the windows on all sides are provided with cross marks, after the first primary mirror and the second primary mirror are installed and adjusted for aligning light paths for the first time, the cross lasers are installed on the mirror frames of the first primary mirror and the second primary mirror through two-dimensional adjusting frames respectively, the two-dimensional adjusting frames are adjusted, cross light of each cross laser is enabled to be overlapped or equidistant with the corresponding cross mark, and each two-dimensional adjusting frame is locked after being adjusted in place.
5. The method for quickly aligning the light path of the split building block reflective schlieren instrument as claimed in claim 4, wherein the method for adjusting the deviation angles of the first main mirror and the second main mirror comprises the following steps: adjusting the vertical deflection of the first main mirror and the second main mirror respectively to enable the vertical line of each cross light to be coincident with or equidistant to the vertical line of each cross mark, so as to adjust the deviation angles of the first main mirror and the second main mirror in the pitching direction; and adjusting the left and right deflection of the first main mirror and the second main mirror to enable the horizontal line of each crossed light ray to be coincident with or equidistant to the horizontal line of each cross mark, so as to adjust the deflection angle of the first main mirror and the second main mirror in the yaw direction.
6. The method as claimed in claim 1, wherein the continuous laser uses a fiber coupled light source, the coupled fiber can be shared with the schlieren light source, and the continuous laser can generate a cone laser at the end of the coupled fiber.
7. The method for quickly aligning the light path of the reflective schlieren instrument of the split building block as claimed in claim 1, wherein the method for adjusting the slit condensing system of the light source by the continuous laser is as follows: and starting the continuous laser, wherein the light spot of the continuous laser completely covers the mirror surface of the first main mirror, the light spot is reflected by the first main mirror and then projects a circular light spot with clear edge on the mirror surface of the second main mirror, and the light source slit light-gathering system is integrally adjusted to translate back and forth, so that the diameter of the circular light spot is equal to the effective aperture of the mirror surface of the second main mirror.
8. The method for quickly aligning the light path of the reflective schlieren instrument of the split building block as claimed in claim 1, wherein the method for reversely adjusting the light source slit condensing system comprises the following steps:
and after the cross laser on one side is irradiated on the first main mirror, the cross laser is reflected towards the light source slit condensing system and condensed, the condensed cross laser on one side can be observed near the slit of the light source slit condensing system, and the center of the cross laser on one side is coincided with the central axis of the slit by integrally adjusting each degree of freedom of the light source slit condensing system.
9. The method for quickly aligning the optical path of the split block reflective schlieren instrument as claimed in claim 1, wherein the method for reversely adjusting the knife-edge imaging system comprises:
and after irradiating the cross laser on the other side onto the second main mirror, reflecting and condensing the cross laser to the direction of the knife edge imaging system, and enabling the cross laser on the other side to enter the knife edge by integrally adjusting each degree of freedom of the knife edge imaging system.
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