CN213482563U - Three aperture imaging system ray apparatus structures - Google Patents
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- CN213482563U CN213482563U CN202022378907.5U CN202022378907U CN213482563U CN 213482563 U CN213482563 U CN 213482563U CN 202022378907 U CN202022378907 U CN 202022378907U CN 213482563 U CN213482563 U CN 213482563U
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Abstract
The utility model discloses a three aperture imaging system ray apparatus structures relates to the telescope field, has solved the problem of current single-aperture telescope support adjustment structure complexity. The utility model discloses a sub-telescope (1) is used for receiving the parallel light incidence, the light beam assembles device (2) and connects and support sub-telescope (1), the light beam assembles device (2) and still is used for carrying out aplanatism and the parallel adjustment to the parallel light, the light beam assembles device (2) below and sets up and is connected with light beam combiner (3), diaxon revolving stage (4) are used for supporting and spacing light beam assembles device (2), diaxon revolving stage (4) still are used for passing sub-telescope (1) and light beam and assemble device (2). The utility model discloses a three aperture imaging system ray apparatus structures, it is simple to support regulation structure, and the dress is transferred the precision height, and the controllability is good, does benefit to the adaptive optics and realizes real-time correction.
Description
Technical Field
The utility model relates to a telescope field, concretely relates to three aperture imaging system ray apparatus structures.
Background
With the exploration requirement of people on high-altitude remote identification, higher and higher requirements are put forward on the high resolution of a telescopic system bearing an observation task. According to the classical rayleigh criterion: when the working wavelength is determined, if the angular resolution of the system is to be improved, only the entrance pupil aperture of the system can be increased, so that the aperture size of the reflective telescope is overlarge. The reflector telescope with ultra-large caliber needs to manufacture an ultra-large single-mirror-surface main reflector. However, large mirrors are currently difficult and heavy to manufacture, machine, inspect and assemble. The self-weight of the large-sized mirror is generally large, and the excessive self-weight causes the movement support structure of the mirror to be complicated.
In order to solve the difficulty of manufacturing ultra-large single-caliber telescopes, several solutions have been proposed, including a split-joint multi-mirror telescope and an interference telescope. The spliced polygon mirror reflector has extremely high requirements on splicing precision, an adjustable supporting structure needs to be designed for each reflector, and the curvature radius of the mirror surface of each sub-reflector can be adjusted through the supporting structure. For the reflector with larger size, the spliced multi-surface mirror can cause abnormal complexity of a supporting and adjusting structure due to excessive quantity of sub-reflectors, the assembling and adjusting precision is difficult to be kept, and real-time correction of self-adaptive optics is not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: to the problem of current single-aperture telescope support adjustment structure complexity, the utility model provides a solve the above-mentioned problem a three aperture imaging system ray apparatus structure.
As basic hardware of the whole set of system, a multi-aperture interference telescope is designed, and according to application requirements, the design of a mechanical support system is completed, namely the optical-mechanical structure of the three-aperture imaging system.
The utility model discloses a following technical scheme realizes:
an optical-mechanical structure of a three-aperture imaging system comprises a sub-telescope, a light beam converging device and a light beam combiner which are sequentially arranged, and further comprises a two-axis rotating platform which supports the optical-mechanical structure;
the light beam converging device is also used for carrying out aplanatism and parallel adjustment on the parallel light, and a light beam combiner is arranged and connected below the light beam converging device and also comprises a two-axis rotating platform arranged outside the light beam converging device;
the two-axis rotating platform is used for supporting and limiting the light beam converging device, and the two-axis rotating platform is further used for transmitting the sub-telescope and the light beam converging device.
Further, the sub-telescope is the annular setting, the diaxon revolving stage is used for cooperating sub-telescope realizes every single move and deflection, sub-telescope adopts cassegrain formula structure.
Further, three sub-telescopes are included, arranged in a Golay3 type, and the Golay3 array has a fill factor range of 0.33< F < 0.65.
Further, the lens comprises sub-apertures of the three sub-telescopes, a primary mirror of the light beam converging device, a secondary mirror of the light beam converging device, a plane reflector of the light beam converging device, a triangular cone of the light beam converging device, four compensating mirrors of the light beam combiner and a CCD image surface;
the imaging path of the light in the lens is: the light beams enter the light beam converging device through the sub apertures of the three sub-telescopes, in the light beam converging device, the light beams are converged to a light beam combiner through reflection of a main mirror, reflection of a secondary mirror, total reflection of a plane reflector and convergence of a rhomboid cone, and in the light beam combiner, the light beams are projected to a CCD image surface through four compensating mirrors.
Further, still include the telescope connecting plate, the telescope connecting plate supports the sub-telescope, telescope connecting plate below is provided with the combiner connecting plate, adopt between combiner connecting plate and the telescope connecting plate to strengthen frame and revolving stage connecting frame and support jointly, just the light beam converging device set up in between combiner connecting plate and the telescope connecting plate, the revolving stage connecting frame still is used for connecting the diaxon revolving stage.
The multi-aperture imaging system further comprises an actuator connecting frame and a micro-displacement actuator, wherein the actuator connecting frame is connected with the micro-displacement actuator and fixes the micro-displacement actuator to the telescope connecting plate, the micro-displacement actuator is used for adjusting the reflecting mirror, the reflecting mirror comprises a primary mirror, a secondary mirror and a plane reflecting mirror, and after the multi-aperture imaging system is initially assembled according to an assembly drawing, various position errors possibly exist among different optical mirror surfaces, so that the brought phase errors influence the final imaging quality. Therefore, each mirror surface needs to be adjusted, and in terms of mechanical structure design, each mirror surface has an adjusting function, wherein the reflecting mirror through which the light beam passes after being emitted through the sub-telescope is electrically adjusted, and the rest is manually adjusted.
The piezoelectric ceramic micro-displacement actuator is arranged at the middle position, namely the translation stroke in the Z-axis direction is 3um, and the inclination stroke is 300 urad. The positions of other mirror surfaces are adjusted through a three-tensioning structure, so that the imaging quality is optimal.
Furthermore, the two-axis rotating platform also comprises a base, a supporting frame, a rotating platform, a bearing end cover and a deep groove ball bearing;
the two-axis rotating platform comprises a transverse rotating platform and a longitudinal rotating platform;
the base supports a transverse rotating platform which is used for driving the supporting frame, a U-shaped supporting frame is arranged on the transverse rotating platform, longitudinal rotating platforms are arranged at two feet of the supporting frame, and each longitudinal rotating platform comprises a bearing end cover, a deep groove ball bearing and a longitudinal rotating disk; set up deep groove ball bearing in the vertical rotary disk, the outside of deep groove ball bearing is provided with the bearing cap towards the side middle section of diaxon revolving stage internal direction, the bearing cap does deep groove ball bearing's bearing cap, the bearing cap is connected the revolving stage connecting frame, the revolving stage connecting frame passes through the bearing cap quilt vertical rotary disk drive.
Further, the beam combiner is disposed between the combiner connection plate and the transverse rotation stage;
the sub-telescope, the light beam converging device, the light beam combiner and the two-axis rotating platform are arranged in sequence in space, and the two-axis rotating platform drives the whole of the sub-telescope, the light beam converging device and the light beam combiner to rotate in a vertical direction by taking the bearing end cover as an axis synchronously through the longitudinal rotating platform;
the two-axis rotating platform drives the sub-telescope, the light beam converging device, the light beam combiner and the two-axis rotating platform to rotate in the horizontal direction by taking the vertical axis of the transverse rotating platform as an axis through the transverse rotating platform.
Further, the two-axis rotating platform further comprises a motor, and the motor drives the rotating platform.
Further, table 3.1 selects technical indexes of the sub-telescope;
TABLE 3.1 technical indices of afocal sub-telescope
The three sub-telescopes are arranged in a ring shape (Golay3 type), a Cassegrain type structure is adopted, parallel light enters, and the parallel light exits after being reflected by the primary mirror and the secondary mirror. The sub-aperture is an afocal telescope system, is used for energy collection, light beam compression and incident light beam angle amplification, has the aperture of 200mm, the total length of the system of 1700mm, the viewing field 2w of 0.2 degrees, the compression ratio of 1:8.3, and works in a visible light wave band (FdC); the design uses light having an operating wavelength of FdC. The telescope system receives the signal as a remote incident beam, in principle a paraxial beam. Since a distant object is incident, a general telescopic system configuration with a field angle of 0 can be used. Considering that the system needs to have certain searching performance, the field of view is increased appropriately, and the angle of view is adjusted. The light beam collection system mainly comprises three card-type subsystems and works in a visible light wave band.
The imaging effect of the system under different field conditions is calculated by utilizing ray tracing, distribution change of the point sequence diagram is compared, the full field angle of the afocal sub-telescope, namely the full field angle of the system, is determined to be 0.2 degrees on the basis of no extra aberration, and the design result meets the diffraction limit in the field of 0.2 degrees. Compared with the traditional Fizeau synthetic aperture interferometric array telescope, the wide field of view is obtained, and the capture and tracking of the fast moving target are facilitated.
And (4) selecting the aperture of the sub-mirror. As a telescopic system, the aperture size directly influences the effect resolution, and the system cut-off frequency is used for calculation
It can be seen that the highest cut-off frequency of the system is directly related to the caliber size.
Comparing the light beam tracking results in the range of phi 100-500 shows that the light beam transmission effects between phi 200-350 are similar, and the light transmission aperture of the main mirror is determined to be phi 200 by combining the processing difficulty and the limit of the period.
The complexity of the more bore synthesis system is too high in view of the ease of implementation of the experimental setup, so that the three sub-telescopes are arranged in a Golay3 type, considering the three sub-mirror configuration. The fill factor is maximum, 0.65, when the sub-apertures are tangent. As the fill factor becomes smaller, that is, the arrangement of the sub-aperture arrays becomes more and more sparse, the MTF cut-off frequency of the system increases, the midband response value of the MTF decreases significantly, and decreases to zero when the fill factor is sufficiently small, and at this time, the resolution of the optical system is determined by the first zero point of the MTF instead of the cut-off frequency position, that is, the resolution of the single aperture. The synthetic aperture resolution is not increased compared to a single sub-aperture, but the beam energy collection is increased. The resulting Golay3 array has a fill factor range of 0.33< F < 0.65.
When the aperture of the sub-telescope is 200mm, the diameter of the circle enclosed by the edges of the sub-telescope is DGeneral assembly570mm, fill factor F3 × π × 1002/π×2852＝0.369。
The angular resolution of an ideal Golay3 array system can be approximated by
Wherein D is the aperture of the sub-aperture and L is the difference between the radius of the circumscribed circle and the radius of the sub-aperture. The angular resolution of the Golay3 array system with a sub-aperture of 200mm and a fill factor of 0.369 at a central wavelength of 550nm can be calculated by the equation to be approximately 0.35 arcsec. By taking the American ARGOS system as a comparison, the aperture of the sub-aperture is phi 210mm, the filling factor is 0.375, and the resolution of the system is 0.35 arcsec.
The utility model discloses have following advantage and beneficial effect:
the utility model discloses a three aperture imaging system ray apparatus structures, it is simple to support regulation structure, and the dress is transferred the precision height, and the controllability is good, does benefit to the adaptive optics and realizes real-time correction.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a layout diagram of the sub-telescope of the present invention.
Fig. 2 is a schematic diagram of the matching error of the present invention.
Fig. 3 is an overall view of the present invention.
Fig. 4 is a position diagram of the light beam converging device of the present invention.
Fig. 5 is a schematic view of the turntable device of the present invention.
Reference numbers and corresponding part names in the drawings:
1. a sub-telescope; 2. a light beam converging device; 3. a beam combiner; 4. a two-axis rotating table; 21. a telescope connecting plate; 22. A reinforcing frame; 23. a rotating table connecting frame; 24. a combiner connection plate; 25. a micro-displacement actuator; 40. a base; 41. a transverse rotating table; 42. a longitudinal rotating table; 43. a bearing end cap; 44. a support frame; 5. an electric motor.
Detailed Description
Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangements of components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without any inventive improvement belong to the protection scope of the present invention.
As basic hardware of the whole set of system, a multi-aperture interference telescope is designed, and according to application requirements, the design of a mechanical support system is completed, namely the optical-mechanical structure of the three-aperture imaging system.
The utility model discloses a following technical scheme realizes:
an optical-mechanical structure of a three-aperture imaging system is shown in figures 3-5 and comprises a sub-telescope 1, a light beam converging device 2 and a light beam combiner 3 which are sequentially arranged, and a two-axis rotating platform 4 which supports the optical-mechanical structure;
the device comprises a sub-telescope 1, a light beam converging device 2, a light beam combiner 3 and a two-axis rotating platform 4, wherein the sub-telescope 1 is used for receiving incident parallel light, the light beam converging device 2 is connected with and supports the sub-telescope 1, the light beam converging device 2 is also used for carrying out aplanatism and parallel adjustment on the parallel light, and the two-axis rotating platform 4 is arranged on the outer side of the light beam converging device 2;
the two-axis rotating platform 4 is used for supporting and limiting the light beam converging device 2, and the two-axis rotating platform 4 is also used for transmitting the sub-telescope 1 and the light beam converging device 2.
Preferably, the sub-telescope 1 is arranged in an annular shape, the two-axis rotating platform 4 is used for matching with the sub-telescope 1 to realize pitching and deflection, and the sub-telescope 1 is of a Cassegrain type structure.
Preferably, three sub-telescopes 1 are included, the three sub-telescopes 1 being arranged in a Golay3 type, and the Golay3 array having a fill factor range of 0.33< F < 0.65.
Preferably, the lens comprises three sub-apertures of the sub-telescope 1, a primary mirror of the light beam converging device 2, a secondary mirror of the light beam converging device 2, a plane mirror of the light beam converging device 2, a triangular cone of the light beam converging device 2, four compensating mirrors of the light beam combiner 3 and a CCD image plane;
the imaging path of the light in the lens is: the light beam enters the light beam converging device 2 through the sub apertures of the three sub telescopes 1, in the light beam converging device 2, light rays are reflected by the primary mirror, reflected by the secondary mirror, totally reflected by the plane mirror and converged to the light beam combiner 3 through the rhomboid cone, and in the light beam combiner 3, the light rays are projected to a CCD image surface through the four compensating mirrors, as shown in FIG. 2.
Preferably, still include telescope connecting plate 21, telescope connecting plate 21 supports sub-telescope 1, telescope connecting plate 21 below is provided with combiner connecting plate 24, adopt between combiner connecting plate 24 and the telescope connecting plate 21 to strengthen frame 22 and revolving stage connecting frame 23 and support jointly, just light beam converging device 2 set up in between combiner connecting plate 24 and the telescope connecting plate 21, revolving stage connecting frame 23 still is used for connecting diaxon revolving stage 4.
Preferably, the multi-aperture imaging system further comprises an actuator connecting frame and a micro-displacement actuator 25, the actuator connecting frame is connected with the micro-displacement actuator 25 and fixes the micro-displacement actuator 25 to the telescope connecting plate 21, the micro-displacement actuator 25 is used for adjusting a reflector, the reflector comprises a primary mirror, a secondary mirror and a plane reflector, and after the primary assembly of the multi-aperture imaging system according to an assembly diagram is completed, due to the fact that various position errors may exist among different optical mirror surfaces, the resulting phase errors affect the final imaging quality. Therefore, each mirror surface needs to be adjusted, and in terms of mechanical structure design, each mirror surface has an adjusting function, wherein the reflecting mirror through which the light beam passes after being emitted through the sub-telescope 1 is electrically adjusted, and the rest is manually adjusted.
The piezoceramic micro-displacement actuator 25 is placed in a middle position, namely a translation stroke of 3um in the Z-axis direction and an inclination stroke of 300 urad. The positions of other mirror surfaces are adjusted through a three-tensioning structure, so that the imaging quality is optimal.
Preferably, the two-axis rotating table 4 further comprises a base 40, a supporting frame 44, a rotating table, a bearing end cover 43 and a deep groove ball bearing;
the two-axis rotary table 4 comprises a transverse rotary table 41 and a longitudinal rotary table 42;
the base 40 supports a transverse rotating platform 41, the transverse rotating platform 41 is used for driving the supporting frame 44, the transverse rotating platform 41 is provided with a U-shaped supporting frame 44, two legs of the supporting frame 44 are provided with longitudinal rotating platforms 42, and each longitudinal rotating platform 42 comprises a bearing end cover 43, a deep groove ball bearing and a longitudinal rotating disk; set up deep groove ball bearing in the vertical rotary disk, the outside of deep groove ball bearing is provided with bearing cap 43 towards the side middle section of diaxon revolving stage 4 internal direction, bearing cap 43 is deep groove ball bearing's bearing cap 43, bearing cap 43 connects revolving stage connecting frame 23, revolving stage connecting frame 23 passes through bearing cap 43 by vertical rotary disk drive.
Preferably, the beam combiner 3 is arranged between the combiner connection plate 24 and the traverse table 41;
the sub-telescope 1, the light beam converging device 2, the light beam combiner 3 and the two-axis rotating platform 4 are spatially arranged in sequence, and the two-axis rotating platform 4 drives the whole of the sub-telescope 1, the light beam converging device 2 and the light beam combiner 3 to synchronously rotate in the vertical direction by taking the bearing end cover 43 as an axis through the longitudinal rotating platform 42;
the two-axis rotating platform 4 drives the sub-telescope 1, the light beam converging device 2, the light beam combiner 3 and the two-axis rotating platform 4 to integrally and synchronously rotate in the horizontal direction by taking the vertical axis of the two-axis rotating platform 41 as an axis through the transverse rotating platform 41.
Preferably, the two-axis rotary table 4 further includes a motor 5, and the motor 5 drives the rotary table.
Preferably, table 3.1 selects technical indexes of the sub-telescope 1;
TABLE 3.2 technical indices of afocal sub-telescope
The three sub-telescopes 1 are arranged in a ring shape (Golay3 type), adopt a Cassegrain type structure, and parallel light enters and exits after being reflected by the primary mirror and the secondary mirror. The sub-aperture is an afocal telescope system, is used for energy collection, light beam compression and incident light beam angle amplification, has the aperture of 200mm, the total length of the system of 1700mm, the viewing field 2w of 0.2 degrees, the compression ratio of 1:8.3, and works in a visible light wave band (FdC); the design uses light having an operating wavelength of FdC. The telescope system receives the signal as a remote incident beam, in principle a paraxial beam. Since a distant object is incident, a general telescopic system configuration with a field angle of 0 can be used. Considering that the system needs to have certain searching performance, the field of view is increased appropriately, and the angle of view is adjusted. The light beam collection system mainly comprises three card-type subsystems and works in a visible light wave band.
The imaging effect of the system under different field conditions is calculated by utilizing ray tracing, distribution change of the point sequence diagram is compared, the full field angle of the afocal sub-telescope 1, namely the full field angle of the system, is determined to be 0.2 degrees on the basis of no extra aberration, and the design result meets the diffraction limit in the field of 0.2 degrees. Compared with the traditional Fizeau synthetic aperture interferometric array telescope, the wide field of view is obtained, and the capture and tracking of the fast moving target are facilitated.
And (4) selecting the aperture of the sub-mirror. As a telescopic system, the aperture size directly influences the effect resolution, and the system cut-off frequency is used for calculation
It can be seen that the highest cut-off frequency of the system is directly related to the caliber size.
Comparing the light beam tracking results in the range of phi 100-500 shows that the light beam transmission effects between phi 200-350 are similar, and the light transmission aperture of the main mirror is determined to be phi 200 by combining the processing difficulty and the limit of the period.
The more bore synthesis system is too complex in view of the ease of implementation of the experimental setup, so the three sub-telescopes 1 are arranged in a Golay3 type in view of the three sub-mirror configuration. The fill factor is maximum, 0.65, when the sub-apertures are tangent. As the fill factor becomes smaller, that is, the arrangement of the sub-aperture arrays becomes more and more sparse, the MTF cut-off frequency of the system increases, the midband response value of the MTF decreases significantly, and decreases to zero when the fill factor is sufficiently small, and at this time, the resolution of the optical system is determined by the first zero point of the MTF instead of the cut-off frequency position, that is, the resolution of the single aperture. The synthetic aperture resolution is not increased compared to a single sub-aperture, but the beam energy collection is increased. The resulting Golay3 array has a fill factor range of 0.33< F < 0.65.
When the caliber of the sub-telescope 1 is 200mm, the diameter of a circle enclosed by the edge of the sub-telescope 1 is D total 570mm, and the filling factor F is 3 multiplied by pi multiplied by 1002/pi multiplied by 2852 multiplied by 0.369.
The angular resolution of an ideal Golay3 array system can be approximated by
Wherein D is the aperture of the sub-aperture and L is the difference between the radius of the circumscribed circle and the radius of the sub-aperture. The angular resolution of the Golay3 array system with a sub-aperture of 200mm and a fill factor of 0.369 at a central wavelength of 550nm can be calculated by the equation to be approximately 0.35 arcsec. By taking the American ARGOS system as a comparison, the aperture of the sub-aperture is phi 210mm, the filling factor is 0.375, the resolution of the system is 0.35arcsec, and the arrangement parameters of the sub-telescope 1 are shown in figure 1.
And selecting data of a two-axis rotating platform 4, wherein the two-axis rotating platform 4 is mainly used for supporting the whole multi-aperture telescope system and realizing the pitching and the deflection of the telescope. The device mainly comprises a base 40, a supporting frame 44, a motor 5, a rotating platform, a deep groove ball bearing and the like. The rotating speed of the deflection rotation is 0.5 degrees per second, the rotation precision is 0.05 degrees, a Korean SPG-KRC01RA400M heavy-load high-precision rotation platform is selected, a 400W servo motor 5 is matched and loosened, the rated rotating speed of the motor 5 is 3000rpm, the platform reduction ratio is 720, the rated output torque is 640Nm, the output rotating speed is 0-4.17rpm and is adjustable, and the repeated positioning precision of the platform is 0.002 degrees. The rotation speed of pitching rotation is 0.5 degrees per second, the rotation precision is 0.05 degrees per second, a Korean SPG-KRC01RA200M heavy-load high-precision rotary platform is selected, a 400W servo motor 5 is matched and loosened, the rated rotation speed of the motor 5 is 3000rpm, the platform reduction ratio is 180, the rated output torque is 640Nm, the output rotation speed is 0-16.67rpm and adjustable, and the repeated positioning precision of the platform is 0.002 degrees.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. An optical-mechanical structure of a three-aperture imaging system is characterized by comprising a sub-telescope (1), a light beam converging device (2) and a light beam combiner (3) which are sequentially arranged, and a two-axis rotating platform (4) supporting the optical-mechanical structure;
the light beam converging device (2) is also used for carrying out aplanatism and parallel adjustment on parallel light, a light beam combiner (3) is arranged and connected below the light beam converging device (2), and the light beam converging device further comprises a two-axis rotating table (4) arranged on the outer side of the light beam converging device (2);
the two-axis rotating table (4) is used for supporting and limiting the light beam converging device (2), and the two-axis rotating table (4) is also used for transmitting the sub-telescope (1) and the light beam converging device (2).
2. The optomechanical structure of a three-aperture imaging system of claim 1, wherein the sub-telescope (1) is in a ring shape, the two-axis rotating platform (4) is used for matching the sub-telescope (1) to realize pitching and deflecting, and the sub-telescope (1) adopts a cassegrain type structure.
3. A three aperture imaging system opto-mechanical architecture according to claim 2, characterized by comprising three sub-telescopes (1), the three sub-telescopes (1) being arranged in a Golay3 type, and the Golay3 array having a fill factor range of 0.33< F < 0.65.
4. The opto-mechanical structure of a three-aperture imaging system according to claim 3, characterized in that the lens comprises the sub-apertures of the three sub-telescopes (1), the primary mirror of the beam converging device (2), the secondary mirror of the beam converging device (2), the plane mirror of the beam converging device (2), the triangular pyramid of the beam converging device (2), the four compensating mirrors of the beam combiner (3) and the CCD image plane;
the imaging path of the light in the lens is: the light beam enters a light beam converging device (2) through sub apertures of three sub telescopes (1), in the light beam converging device (2), light is converged to a light beam combiner (3) through reflection of a main mirror, reflection of a secondary mirror, total reflection of a plane reflector and triangular pyramid, and in the light beam combiner (3), the light is projected to a CCD image surface through four compensating mirrors.
5. The optomechanical structure of a three-aperture imaging system of claim 4, further comprising a telescope connecting plate (21), wherein the telescope connecting plate (21) supports the sub-telescope (1), a combiner connecting plate (24) is disposed below the telescope connecting plate (21), the combiner connecting plate (24) and the telescope connecting plate (21) are jointly supported by a reinforcing frame (22) and a rotating table connecting frame (23), the beam converging device (2) is disposed between the combiner connecting plate (24) and the telescope connecting plate (21), and the rotating table connecting frame (23) is further used for connecting the two-axis rotating table (4).
6. A three aperture imaging system opto-mechanical configuration of claim 5, characterized in that it further comprises an actuator linkage and a micro-displacement actuator (25), said actuator linkage connecting said micro-displacement actuator (25) and fixing said micro-displacement actuator (25) to said telescope connection plate (21), said micro-displacement actuator (25) being used to adjust the mirrors, including primary, secondary and plane mirrors.
7. The opto-mechanical structure of a three-aperture imaging system according to claim 6, characterized in that the two-axis rotary table (4) further comprises a base (40), a support frame (44), a rotary table, a bearing cap (43) and a deep groove ball bearing;
the two-axis rotating platform (4) comprises a transverse rotating platform (41) and a longitudinal rotating platform (42);
the base (40) supports a transverse rotating platform (41), the transverse rotating platform (41) is used for driving the supporting frame (44), the transverse rotating platform (41) is provided with a U-shaped supporting frame (44), two feet of the supporting frame (44) are provided with longitudinal rotating platforms (42), and each longitudinal rotating platform (42) comprises a bearing end cover (43), a deep groove ball bearing and a longitudinal rotating disk; set up deep groove ball bearing in the vertical rotary disk, deep groove ball bearing's outside is provided with bearing cap (43) towards the side middle section of diaxon revolving stage (4) internal direction, bearing cap (43) do deep groove ball bearing's bearing cap (43), bearing cap (43) are connected revolving stage linking frame (23), revolving stage linking frame (23) pass through bearing cap (43) quilt vertical rotary disk drive.
8. A three aperture imaging system opto-mechanical architecture according to claim 7, characterized in that the beam combiner (3) is arranged between the combiner connection plate (24) and the traverse table (41);
the sub-telescope (1), the light beam converging device (2), the light beam combiner (3) and the two-axis rotating platform (4) are arranged in sequence in space, and the two-axis rotating platform (4) drives the whole of the sub-telescope (1), the light beam converging device (2) and the light beam combiner (3) to rotate in a vertical direction by taking the bearing end cover (43) as an axis through a longitudinal rotating platform (42);
the two-axis rotating table (4) drives the sub-telescope (1), the light beam converging device (2), the light beam combiner (3) and the two-axis rotating table (4) through the transverse rotating table (41), and the whole of the four devices is synchronous in the horizontal direction and rotates by taking the vertical axis where the transverse rotating table (41) is located as an axis.
9. A three aperture imaging system opto-mechanical architecture as claimed in claim 8, characterized in that the two-axis rotary stage (4) further comprises a motor (5), the motor (5) driving the two-axis rotary stage (4).
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