IFU common space adjusting device of optical fiber array telescope

Abstract

The invention discloses an IFU common space adjusting device of an optical fiber array telescope, which comprises two IFU common space adjusting device bodies arranged in the optical fiber array telescope, each IFU common space adjusting device body comprises an optical fiber array end, a ball head adjusting unit, an X-direction and Y-direction adjusting unit, a semi-transparent and semi-reflecting mirror group, a z-direction adjusting unit and an optical filter assembly which are sequentially connected from top to bottom, and one side of the semi-transparent and semi-reflecting mirror group is further connected with a monitoring CCD light path mechanism component located on a reflecting light path of the semi-transparent and semi-reflecting mirror group; therefore, two IFU co-space adjusting devices in a set of optical fiber array telescope can carry out IFU co-space adjustment. According to the invention, each translation, light path angle adjustment and rotation adjustment are independent from each other in dimension, no adjustment coupling phenomenon exists, and the adjustment work is smoother and more convenient.

Description

Technical Field

[0001] The present invention relates to an IFU common space adjustment device, specifically an IFU common space adjustment device for a fiber optic array telescope. Background Art

[0002] The spectral observation mode is one of the conventional observation means of modern solar telescopes. Among the spectrometers equipped with different spectral observation modes, the aperture structure generally mainly uses slits. With the development of astronomical instruments and technologies in recent years, fiber optic array slits have gradually been more widely used. In the previous slit spectrometers, only the light passing through the dispersion slit each time is used, so the information obtained is the spectral information of a certain depth range corresponding to the slit in the field of view. When it is necessary to collect the spectrum of a surface of a star, it is necessary to scan this area. Since the scanning takes time, the information obtained does not have simultaneity. Especially in the field of solar polarization observation magnetic field inversion, this non-simultaneous observation brings certain observation errors. Different from the slit, the fiber optic array corresponds to a two-dimensional surface in the field of view. On this surface, the spectral information of a certain star depth can be obtained simultaneously, greatly improving the spectral acquisition accuracy of the device. This kind of fiber optic array is called an Integral Field Unit (IFU), and the complete field of view information is obtained by integrating several units in the entire observation field of view. The fiber optic array IFU is mainly divided into two ends: the array end and the slit end. After the light passes through the telescope imaging and the back-end imaging, it converges at the lens array end to form a certain light spot. This beam of light is conducted through the optical fiber to the slit end and then emitted. One end of the fiber optic bundle is arranged on a surface at the array end, and the other end is arranged linearly on the slit end. In this way, the light information of the two-dimensional surface can be arranged into vertical light information, and then the spectrum obtained by the spectrometer dispersion is the spectral information of the two-dimensional surface in the field of view. However, the IFU has strict requirements for the attitude position of the telescope back-end: the imaging focus of the telescope and the back-end system should be located at the IFU array end, that is, the surface of the array end needs to coincide with the back-end focal plane of the telescope, and different devices have specific requirements for the rotation angle between the array end surface and the light spot. Especially in the field of polarization measurement, generally, the telescope back-end separates the light into two beams of light: the o-light and the e-light. Both of these two beams of light need to be simultaneously irradiated on the corresponding two fiber optic array IFUs. Therefore, there are common space adjustment requirements for the array ends of the two IFUs: both the o-light and e-light splitting optical paths need to be strictly focused, and the corresponding relationship between the light spot image and the array end surface must be exactly the same. Therefore, the following difficulties exist in this type of equipment in engineering:

[0003] What is the judgment basis for determining the corresponding relationship between the light spot images of the o-light and e-light splitting optical paths and the array end surface;

[0004] Generally, the observation field of view of a telescope is small. Taking a field of view of 1 arc minute and an array end of 60×60 as an example, when the light spot of the 1-arc-minute field of view is the circumcircle of the 60×60 at the array end, the beam diameter received by each optical fiber is approximately 0.7 arc seconds. Therefore, the optical adjustment of the common space must be sensitive to feedback, and it is not easy to achieve sensitive optical feedback for common space adjustment.

[0005] The IFU has high requirements for the incident angle of the incident light. In theory, the incident light is orthogonal to the end face of the array. However, there must be errors in actual engineering production of the IFU, and this error is random. Therefore, it is necessary to determine the appropriate observation angle between the incident light and the array end.

[0006] When there is coupling between all translations and rotations of the field of view and the slit end, the judgment basis for adjustment is very misleading. What kind of structural design form to reduce the coupling phenomenon of adjustment dimensions is directly related to the smooth progress of the work. Summary of the Invention

[0007] The purpose of the present invention is to provide an IFU common space adjustment device for a fiber array telescope to solve the problems raised in the above background technology.

[0008] To achieve the above purpose, the present invention provides the following technical solutions:

[0009] An IFU common space adjustment device for a fiber array telescope includes two IFU common space adjustment device bodies installed in the fiber array telescope. Each IFU common space adjustment device body includes a fiber array end, a ball head adjustment unit, an X-direction and Y-direction adjustment unit, a semi-transparent and semi-reflective mirror group, a z-direction adjustment unit, and a filter component connected in sequence from top to bottom. And on one side of the semi-transparent and semi-reflective mirror group, there is also a monitoring CCD optical path mechanism component located on its reflected light path.

[0010] Among them, the ball head adjustment unit is used to adjust the angle between the fiber array end and the working surface where the X-direction and Y-direction adjustment units are located.

[0011] The X-direction and Y-direction adjustment units are used to adjust the position of the light spot at the end of the fiber array end; the z-direction adjustment unit is used to adjust the focus.

[0012] The X-direction and Y-direction adjustment units are rotationally connected to the semi-transparent and semi-reflective mirror group and are used for adjusting the light spot angle at the end of the fiber array end (1) in the two IFU common space adjustment device bodies; so as to facilitate the IFU common space adjustment of the two IFU common space adjustment devices in a set of fiber array telescopes.

[0013] As a further solution of the present invention: the ball head adjustment unit includes a ball head adjustment seat, a ball head rotation seat, a flange, a spherical gasket, a spring, a bolt and a spherical nut; the main structures of the ball head adjustment seat and the ball head rotation seat are cylindrical, and one end of each is closed to form an arc surface, and the end of this arc surface is rotatably arranged in the spherical concave surface formed at one end of the ball head rotation seat; the through holes on the ball head adjustment seat and the ball head rotation seat correspond to the end of the fiber optic array; three connecting ears are connected to the outer surfaces of both the ball head adjustment seat and the ball head rotation seat. The connecting ears on the ball head adjustment seat and the connecting ears on the ball head rotation seat are connected by a bolt and a spherical nut. A spring is sleeved on the bolt between the connecting ears on the ball head adjustment seat and the connecting ears on the ball head rotation seat to elastically tighten the connection between the ball head adjustment seat and the ball head rotation seat. At the same time, a spherical gasket is inserted between the tail of the bolt and the corresponding connecting ear.

[0014] As a further solution of the present invention: the X-direction and Y-direction adjustment units include an X-direction movable platform, a Y-direction movable platform, a Y-direction track, a Y-direction slider, an X-direction track, an X-direction slider, a translation base, a positioning bracket, and an adjustment component. Opposite sides of the Y-direction movable platform are respectively fixedly connected to the Y-direction track, and the Y-direction slider is slidably connected to the Y-direction track. The Y-direction slider is fixedly connected to the translation base through a bracket; opposite sides of the X-direction movable platform are respectively fixedly connected to the X-direction track, and the X-direction slider is slidably connected to the X-direction track. The X-direction slider is fixedly connected to the Y-direction movable platform through a bracket. The X-direction track is vertically arranged in space with respect to the Y-direction slider; an adjustment component consistent with its adjustment direction is arranged on the side of the X-direction movable platform, and the adjustment component on the side of the X-direction movable platform is connected to the Y-direction movable platform through a bracket; an adjustment component consistent with its adjustment direction is also arranged on the side of the Y-direction movable platform, and the adjustment component on the side of the Y-direction movable platform is connected to the translation base through a bracket.

[0015] As a further solution of the present invention: a hollow shaft is provided at the top of the lens group housing of the semi-transmissive and semi-reflective lens group; the hollow shaft is rotatably connected to the central circular hole of the translation base; a positioning bracket is further fixedly connected to the bottom of the translation base, and the positioning bracket is positioned on the outer surface of the semi-transmissive and semi-reflective lens group through an adjustment component. A limit baffle is fixedly connected to the outer surface of the lens group housing in the semi-transmissive and semi-reflective lens group. The limit baffle is used to be perpendicularly arranged with the adjustment component on the positioning bracket, and positioning is achieved by the adjustment component contacting the limit baffle.

[0016] As a further solution of the present invention: each of the adjusting components includes a fixing nut and a screw rod assembly, wherein the fixing nut is fixedly connected to the corresponding bracket, and the screw rod assembly is threadedly connected to the corresponding fixing nut. By rotating the corresponding screw rod assembly, the movement of the corresponding X-direction movable platform relative to the Y-direction movable platform, and the movement of the X-direction movable platform and the Y-direction movable platform relative to the translation base are realized, so as to realize the adjustment on the plane formed by the XY direction.

[0017] As a further solution of the present invention: the screw rod assembly includes a knob, an adjusting screw rod and a ball. One end of the adjusting screw rod is fixedly connected to the knob, and the other end of the adjusting screw rod is open and a ball is placed therein.

[0018] As a further solution of the present invention: the semi-transmissive semi-reflective mirror group includes a mirror group housing, an upper frame, a semi-transmissive semi-reflective mirror and a lower frame; the mirror group housing is a cylindrical structure and both ends thereof are located on the path of the incident light path. A semi-transmissive semi-reflective mirror is arranged inside the mirror group housing, and the semi-transmissive semi-reflective mirror is clamped by the upper frame and the lower frame located on its front and back sides. The upper frame is also fixedly connected inside the mirror group housing through corresponding screws.

[0019] As a further solution of the present invention: the z-direction adjusting unit includes a z-direction adjusting seat, a sealing gasket, a sliding sleeve, a Z-direction slider, a Z-direction track and a fixing plate. One end of the sliding sleeve is slidably connected inside the z-direction adjusting seat, and the other end of the sliding sleeve is fixedly connected to the end of the mirror group housing through screws; a plurality of vertical Z-direction tracks are fixedly connected to the surface of the sliding sleeve, and the Z-direction slider is slidably connected on the Z-direction track, and the Z-direction slider is slidably connected to the inner wall of the z-direction adjusting seat. A sealing gasket is arranged between the z-direction adjusting seat and the sliding sleeve, and the sealing gasket is a rubber gasket cut according to the gap between the two; a plurality of fixing plates are arranged on the side surface of the z-direction adjusting seat, and chutes arranged along the Z direction are opened on the fixing plates. Bolts are correspondingly arranged at the chutes and the bolts are fixedly connected to the z-direction adjusting seat. Fixing is realized by locking the bolts at the chutes, and round holes are also opened on the fixing plates and the fixing plates are fixedly connected to the surface of the mirror group housing through corresponding screws.

[0020] As a further solution of the present invention: an insertion hole is opened on the side surface of the z-direction adjusting seat, and a filter element assembly is slidably connected inside the insertion hole. The filter element assembly includes a sliding frame, and a stepped hole is opened on the sliding frame, and the filter element is pressed by a pressing ring in the stepped hole, that is, the diameter of the filter element is equal to the diameter of the large hole in the stepped hole; the filter element is located on the path of the incident light path and is used for filtering the light path.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] Each translation, optical path angle adjustment and rotation adjustment of the present invention are independent of each other in dimension, and there is no adjustment coupling phenomenon, making the adjustment work smoother and more convenient.

[0023] All translation adjustment dimensions of the present invention adopt precise slider guide rail groups, with good dimensional stability, good structural rigidity, and no looseness or poor resetability.

[0024] The adjustment feedback of the present invention is delicate and controllable, and the adjustment efficiency is high (that is, the optical feedback of the co-space adjustment of the present invention is sensitive and easy to achieve in the common space).

[0025] The adjustment sequence of the present invention is reasonable. The components of the CCD optical path mechanism for adjustment monitoring present the logical relationship of the spot image irradiation of the IFU co-space adjustment device as follows: when a clear spot image appears first, focus is achieved, that is, the position is determined by the Z-direction translation adjustment; according to the characteristics in the spot image, the positions in the x-direction and Y-direction are adjusted to achieve the position correspondence relationship between the image and the array end of the IFU co-space adjustment device; then the XY-direction rotation is adjusted to achieve the rotation angle relationship between the spot image and the array end of the IFU co-space adjustment device, so as to achieve co-space adjustment; in addition, the fiber array end is adjusted in real time through the ball head adjustment unit 2 to coincide with the optical path.

[0026] The present invention uses the components of the CCD optical path mechanism for adjustment monitoring to provide intuitive feedback on the debugging results, avoiding the phenomenon of unclear debugging results.

[0027] The debugging process of the present invention has been verified through actual operation. The method is effective and can play a very good reference and exemplary role in the debugging of similar equipment.

[0028] The structure of the present invention has good rigidity, which directly affects the corresponding attitude stability between the IFU array end and the rear end of the telescope. Good rigidity is the guarantee of observation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural diagram of the IFU co-space adjustment device for a fiber array type telescope.

[0030] Figure 2 It is an exploded schematic diagram of the fiber array end and the ball head adjustment unit in the IFU co-space adjustment device for a fiber array type telescope.

[0031] Figure 3 It is a schematic structural diagram of the fiber array end and the ball head adjustment unit in the IFU co-space adjustment device for a fiber array type telescope.

[0032] Figure 4 It is an exploded structural schematic diagram of the X-direction and Y-direction adjustment units in the IFU co-space adjustment device for a fiber array type telescope.

[0033] Figure 5 It is a schematic structural diagram of the X-direction and Y-direction adjustment units in the IFU co-space adjustment device for a fiber array type telescope.

[0034] Figure 6It is a schematic structural diagram of a screw component in an IFU common-space adjustment device for a fiber array telescope.

[0035] Figure 7 It is an exploded structural diagram of a semi-transparent and semi-reflective mirror group, a z-direction adjustment unit, and a filter component in an IFU common-space adjustment device for a fiber array telescope.

[0036] Figure 8 It is a schematic structural diagram of the connection of a semi-transparent and semi-reflective mirror group, a z-direction adjustment unit, and a filter component in an IFU common-space adjustment device for a fiber array telescope.

[0037] Figure 9 It is a schematic diagram of a mirror group housing in an IFU common-space adjustment device for a fiber array telescope. Specific implementation mode

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] Please refer to Figures 1-8 , in the embodiments of the present invention, an IFU common-space adjustment device for a fiber array telescope includes a fiber array end 1, a ball head adjustment unit 2, an X-direction and Y-direction adjustment unit 3, a semi-transparent and semi-reflective mirror group 4, a z-direction adjustment unit 5, and a filter component 6 that are connected in sequence from top to bottom. The fiber array end 1, the ball head adjustment unit 2, the X-direction and Y-direction adjustment unit 3, the semi-transparent and semi-reflective mirror group 4, the z-direction adjustment unit 5, and the filter component 6 are all located on the path of the incident light path, and a monitoring CCD optical path mechanism component 7 is also connected to one side of the semi-transparent and semi-reflective mirror group 4 on its reflected light path.

[0040] The spot structure of the fiber array end 1 is monitored and displayed through the monitoring CCD optical path mechanism component 7.

[0041] The above fiber array end 1 is prior art and will not be elaborated here. The end of the fiber array end 1 is inserted into the ball head adjustment unit 2.

[0042] As Figure 2 and 3, the ball head adjustment unit 2 includes a ball head adjustment seat 15, a ball head rotating seat 16, a flange 17, a spherical gasket 18, a spring 19, a bolt 20 and a spherical nut 21; the main structures of the ball head adjustment seat 15 and the ball head rotating seat 16 are cylindrical, and one end of them is closed to form an arc surface, and the end of this arc surface is rotatably arranged in the spherical concave surface formed at one end of the ball head rotating seat 16; the through holes on the ball head adjustment seat 15 and the ball head rotating seat 16 correspond to the end of the fiber optic array end 1 for the incident light path to pass through; further, three connecting ears are connected to the outer surfaces of both the ball head adjustment seat 15 and the ball head rotating seat 16, and the connecting ears on the ball head adjustment seat 15 and the connecting ears on the ball head rotating seat 16 are connected by a bolt 20 and a spherical nut 21, and a spring 19 is sleeved on the bolt 20 between the connecting ears on the ball head adjustment seat 15 and the connecting ears on the ball head rotating seat 16 to elastically tighten the connection between the ball head adjustment seat 15 and the ball head rotating seat 16. Specifically, the head of the bolt 20 passes through the corresponding connecting ear and is threadedly connected to the spherical nut 21, and at the same time, a spherical gasket 18 is inserted between the tail of the bolt 20 and the corresponding connecting ear. By rotating the nut 21 to adjust the two connecting ears on the same bolt 20, the relative rotation of the ball head adjustment seat 15 and the ball head rotating seat 16 is realized, and further the relative angle adjustment of the fiber optic array end 1 connected thereto is realized; the above-mentioned spherical nut 21 is a spherical metal part with a threaded through hole, and the spherical gasket 18 is a spherical metal part with a through hole, which is used to reduce the friction during adjustment. The other end of the ball head rotating seat 16 is connected to the flange 17 by screws, and the flange 17 is also fixedly connected to the X-direction and Y-direction adjustment unit 3 by other screws. At the same time, one end of the fiber optic array end 1 is inserted into the port at the other end of the ball head adjustment seat 15 and is fixed;

[0043] As Figure 4 and 5 , the X-direction and Y-direction adjustment unit 3 includes an X-direction movable platform 22, a Y-direction movable platform 23, a Y-direction track 24, a Y-direction slider 25, an X-direction track 26, an X-direction slider 27, a translation base 28, a positioning bracket 29, a fixing nut 30, a screw rod assembly 31, and an adjustment assembly 32. Two opposite sides of the Y-direction movable platform 23 are respectively fixedly connected to the Y-direction track 24, and the Y-direction slider 25 is slidably connected to the Y-direction track 24. The Y-direction slider 25 is fixedly connected to the translation base 28 through a bracket; two opposite sides of the X-direction movable platform 22 are respectively fixedly connected to the X-direction track 26, and the X-direction slider 27 is slidably connected to the X-direction track 26. The X-direction slider 27 is fixedly connected to the Y-direction movable platform 23 through a bracket. The X-direction track 26 is vertically arranged in space with the Y-direction slider 25;

[0044] Through holes for the incident light path to pass through are provided in the middle of the X-direction movable platform 22, the Y-direction movable platform 23 and the translation base 28;

[0045] On the side of the X-direction movable platform 22, an adjusting component 32 is provided in the same direction as its adjustment direction. The adjusting component 32 on the side of the X-direction movable platform 22 is connected to the Y-direction movable platform 23 through a bracket;

[0046] On the side of the Y-direction movable platform 23, an adjusting component 32 is also provided in the same direction as its adjustment direction. The adjusting component 32 on the side of the Y-direction movable platform 23 is connected to the translation base 28 through a bracket.

[0047] The middle circular hole of the translation base 28 is rotatably connected to the top of the semi-transmissive semi-reflective mirror group 4. Specifically, one end of a hollow shaft 341 is connected to the top of the mirror group housing 34 of the semi-transmissive semi-reflective mirror group 4 (such as Figure 9 , the hollow shaft 341 has four remaining arc-shaped protrusions, but it does not affect the rotation effect). The hollow shaft 341 is located around the through hole for the light path to pass through on the mirror group housing 34, and the hollow shaft is coaxially arranged with the through hole for the light path to pass through on the mirror group housing 34; the hollow shaft 341 is rotatably connected in the middle circular hole of the translation base 28, that is, the fiber array end 1, the ball head adjustment unit 2, and the X-direction and Y-direction adjustment units 3 can rotate relative to the mirror group housing 34; in order to fix the top of the mirror group housing 34, an arc-shaped hole is also provided, and a screw passes through the arc-shaped hole and is connected to the translation base 28;

[0048] The bottom of the translation base 28 is also fixedly connected with a positioning bracket 29. The positioning bracket 29 is positioned on the outer surface of the semi-transmissive semi-reflective mirror group 4 through the adjusting component 32. A limiting baffle 33 is fixedly connected to the outer surface of the mirror group housing 34 in the semi-transmissive semi-reflective mirror group 4. The limiting baffle 33 is used to be perpendicular to the adjusting component 32 on the positioning bracket 29, and positioning is achieved by the adjusting component 32 contacting the limiting baffle 33.

[0049] Each of the adjusting components 32 includes a fixing nut 30 and a screw rod assembly 31. The fixing nut 30 is fixedly connected to the corresponding bracket, and the screw rod assembly 31 is threadedly connected to the corresponding fixing nut 30. By rotating the corresponding screw rod assembly 31, the corresponding movement of the X-direction movable platform 22 relative to the Y-direction movable platform 23, and the movement of the X-direction movable platform 22 and the Y-direction movable platform 23 relative to the translation base 28 are realized, so as to realize the adjustment on the plane formed by the XY direction.

[0050] Such as Figure 6, the screw assembly 31 includes a knob 311, an adjusting screw 312, and a ball 313. One end of the adjusting screw 312 is fixedly connected to the knob 311. The other end of the adjusting screw 312 is open and a ball 313 is placed therein, and the ball 313 is positioned by closing the opening edge at the other end of the adjusting screw 312, so that the ball 313 will not fall off and can roll; that is, the screw assembly 31 does not affect the movement in the direction perpendicular to it.

[0051] Each of the screw assemblies 31 can be used in cooperation with a smooth rod to improve stability, and the smooth rod is also slidably connected in a through hole opened in the corresponding bracket.

[0052] Such as Figure 7 And 8 , the semi-transmissive semi-reflective mirror group 4 includes a mirror group housing 34, an upper frame 35, a semi-transmissive semi-reflective mirror 36, and a lower frame 37; the mirror group housing 34 is a cylindrical structure and both ends thereof are located on the path of the incident light path. A semi-transmissive semi-reflective mirror 36 is arranged inside the mirror group housing 34, and the semi-transmissive semi-reflective mirror 36 is clamped by the upper frame 35 and the lower frame 37 located on its front and back sides, and the upper frame 35 is also fixedly connected inside the mirror group housing 34 through corresponding screws.

[0053] Such as Figure 7 And 8 , the monitoring CCD optical path mechanism component 7 includes a lens 38, an imaging lens group connecting seat 39, an imaging lens group 40, a CCD image sensor fixing seat 41, and a CCD image sensor 42; a through groove is opened on the surface of the mirror group housing 34 in the direction of the reflection optical path. The imaging lens group connecting seat 39 is connected to the mirror group housing 34 by screws. The hole in the middle of the imaging lens group connecting seat 39 corresponds to the through groove, and a lens 38 is clamped and fixedly connected between the imaging lens group connecting seat 39 and the mirror group housing 34. One end of the imaging lens group connecting seat 39 for connecting the imaging lens group 40, and the other end of the imaging lens group 40 is connected to the CCD image sensor 42 through the CCD image sensor fixing seat 41; this mechanism is used to collect the optical path signal reflected by the semi-transmissive semi-reflective mirror 36. The CCD image sensor 42 is connected to the display unit according to the selected model and the adapted single-chip microcomputer. The selection and connection of this hardware are well-known attempts in the technical field, and will not be elaborated here.

[0054] Such as Figure 7 And 8, the z-direction adjustment unit 5 includes a z-direction adjustment base 8, a gasket 9, a sliding sleeve 10, a Z-direction slider 12, a Z-direction rail 13, and a fixing plate 14. One end of the sliding sleeve 10 is slidably connected inside the z-direction adjustment base 8, and the other end of the sliding sleeve 10 is fixedly connected to the end of the lens group housing 34 by screws. A plurality of vertical Z-direction rails 13 are fixedly connected to the surface of the sliding sleeve 10. The Z-direction slider 12 is slidably connected to the Z-direction rails 13, and the Z-direction slider 12 is slidably connected to the inner wall of the z-direction adjustment base 8. A gasket 9 is provided between the z-direction adjustment base 8 and the sliding sleeve 10. The gasket is a rubber pad cut according to the gap between the two. A plurality of fixing plates 14 are provided on the side of the z-direction adjustment base 8. A chute 11 is provided on the fixing plate 14 along the Z direction. A bolt is correspondingly provided at the chute 11 and the bolt is fixedly connected to the z-direction adjustment base 8. Fixing is achieved by tightening the bolt at the chute 11. The chute 11 can also achieve stepless adjustment. The fixing plate 14 is also provided with a round hole and is fixedly connected to the surface of the lens group housing 34 by corresponding screws.

[0055] As Figure 7 , a jack is provided on the side of the z-direction adjustment base 8. A filter assembly 6 is slidably connected inside the jack. The filter assembly 6 includes a sliding frame 43. A stepped hole is provided on the sliding frame 43, and the filter 44 is pressed in the stepped hole by a retaining ring 45. That is, the diameter of the filter 44 is equal to the diameter of the large hole in the stepped hole. The filter 44 is located on the path of the incident light path and is used to filter the light path.

[0056] There are two IFU co-space adjustment devices at the rear end of the system of a set of fiber optic array telescopes that need to be adjusted. When the images formed by the two IFU co-space adjustment devices are at the same position at the fiber optic array end, co-space adjustment is achieved. The adjustment method of the IFU co-space adjustment device of the fiber optic array telescope is as follows:

[0057] Step 1. Initial adjustment:

[0058] Adjust the ball head adjustment unit 2, the X-direction and Y-direction adjustment units 3, and the z-direction adjustment unit 5 to the initial state. That is, the ball head adjustment unit 2 can achieve the angle adjustment of the fiber optic array end 1 relative to the plane where the X-direction and Y-direction adjustment units 3 are located. The X-direction and Y-direction adjustment units 3 can translate in the X direction and the Y direction, and the z-direction adjustment unit 5 can move in the Z-axis direction (the z-direction adjustment unit 5 is perpendicular to the plane where the X-direction and Y-direction adjustment units 3 are located).

[0059] First, adjust the ball head adjustment unit 2 to the initial state. That is, by adjusting the screw rod assembly 31 and the fixing nut 30, the axis of the fiber optic array end 1 is located in the Z-axis direction of the entire device (it can also be said that the fiber optic array end 1 is set perpendicular to the plane where the X-direction and Y-direction adjustment units 3 are located in the initial state).

[0060] Adjust the X-direction and Y-direction adjustment units 3 to the initial state, specifically, make the Y-direction slider 25 located in the middle of the Y-direction track 24, and the X-direction slider 27 located in the middle of the X-direction track 26, so as to achieve the initial state of the X-direction and Y-direction adjustment units 3. And adjust the corresponding screw assembly 31 to contact the corresponding X-direction movable platform 22 and the Y-direction movable platform 23 for limiting;

[0061] Adjust the z-direction adjustment unit 5 to the initial state, adjust the z-direction slider 12 to the middle of the z-direction track 13 , and fix the locking screws on the plate 14 .

[0062] Step 2: Rough Adjustment

[0063] In the coarse adjustment stage, the ball head adjustment unit 2 is rotated in accordance with the angle of the incident light path by translation in the Z direction; finally, the translation adjustment in the X and Y directions of the single IFU common space adjustment device can only be roughly positioned;

[0064] Specifically, after the telescope is pointed at the sun and the light is passed through, light is irradiated onto the optical fiber array end 1 of the IFU common space adjustment device and forms a light spot. At the same time, the end of the optical fiber array end 1 (the end of the optical fiber material in the optical fiber array end 1 can reflect light) reflects the reflected light, which is reflected by the semi-transparent and semi-reflective mirror 36 into the monitoring CCD optical path mechanism component 7, and the light spot image on the surface of the optical fiber array end 1 is presented on the display unit connected to the CCD image sensor.

[0065] Pull out the sliding sleeve 10 in the z-direction adjustment unit 5. When the light spot image of the end face of the optical fiber array end 1 appears on the display unit connected to the CCD image sensor and becomes the clearest, the position of the sliding sleeve 10 is confirmed, and the screws on the fixing plate 14 (the screws on the sliding groove on the fixing plate 14 can be loosened before adjustment) are tightened to complete the z-direction translation adjustment and achieve system focusing.

[0066] Loosen the three bolts 20 and the corresponding ball nuts 21 in the ball head adjustment unit 2, and manually randomly move the optical fiber array end 1 so that the ball head adjustment seat 15 in the ball head adjustment unit 2 rotates in the ball head rotation seat 16. When the light spot on the end face of the optical fiber array end 1 increases to the brightest on the display unit connected to the CCD image sensor, the angle relationship between the optical fiber array end 1 and the incident light path is confirmed, and then manually tighten the three bolts 20 and the corresponding ball nuts 21 to complete the adjustment of the angle of the incident light path;

[0067] By manually rotating the screw assemblies 31 corresponding to the sides of the X-direction movable platform 22 (screw assemblies 31 are provided corresponding to both opposite sides of the X-direction movable platform 22), the X-direction slider 27 is pushed to slide on the X-direction track 26. When the spot image on the end face of the fiber optic array end 1 presented on the display unit connected to the CCD image sensor becomes the brightest, the position of the X-direction movable platform 22 is confirmed. By manually rotating the screw assemblies 31 corresponding to the sides of the Y-direction movable platform 23 (screw assemblies 31 are also provided corresponding to both opposite sides of the Y-direction movable platform 23), the Y-direction slider 25 is pushed to be located on the Y-direction track 24. When the spot image on the end face of the fiber optic array end 1 presented on the display unit connected to the CCD image sensor becomes the brightest, the position of the Y-direction movable platform 23 is confirmed. That is, the rough adjustment of translation in the X-direction and Y-direction is completed.

[0068] Step Three: Fine Adjustment

[0069] The fine adjustment stage can determine the precise positions of translation in the X-direction and Y-direction;

[0070] First, when the telescope is aligned with sunspots during the day or passes light through small-scale celestial bodies at night, light shines on the two IFU common space adjustment devices and forms a spot with a structure on the fiber optic array end 1. At the same time, a spot image with a structure at the end of the corresponding fiber optic array end 1 is presented on the display unit connected to the CCD image sensors of the two IFU common space adjustment devices.

[0071] Based on the spot image with a structure at the end of the fiber optic array end 1 presented on the display unit, it can be used to judge the deviation of the structure in the image on the two IFU common space adjustment devices at the end position of the corresponding fiber optic array end;

[0072] According to the deviation situation, the X-direction and Y-direction adjustment units 3 in each of the two IFU common space adjustment devices are adjusted respectively; at this time, the translation base 28 can also be rotated as needed to change the included angle between the translation base 28 and the lens group housing 34, so that the spots with a structure formed on the fiber optic array ends 1 of the two IFU common space adjustment devices are the same. During the fine adjustment process, the ball head adjustment unit 2 can be used again as needed to adjust the fiber optic array end to coincide with the optical path in real time.

[0073] The final judgment basis is: in the two IFU common space adjustment devices at the rear end of the fiber optic telescope, the corresponding relationships of the spot images at the ends of the fiber optic array end 1 presented on the display unit connected to the CCD image sensors are the same, that is, the common space adjustment is completed;

[0074] The filter assembly 6 is replaced according to the specific observation target.

[0075] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An IFU common space adjustment device for a fiber array telescope, comprising two IFU common space adjustment device bodies installed in a set of fiber array telescopes, characterized in that: Each IFU common space adjustment device body comprises an optical fiber array end (1), a ball head adjustment unit (2), an X-direction and Y-direction adjustment unit (3), a semi-transparent and semi-reflective mirror group (4), a z-direction adjustment unit (5) and a filter assembly (6) which are connected in sequence from top to bottom, and one side of the semi-transparent and semi-reflective mirror group (4) is also connected to a monitoring CCD optical path mechanism component (7) located on its reflected optical path; The ball head adjustment unit (2) is used to adjust the angle between the fiber array end (1) and the working surface where the X-direction and Y-direction adjustment units (3) are located; The X-direction and Y-direction adjustment units (3) are used to adjust the position of the light spot at the end of the fiber array end (1); The z-direction adjustment unit (5) is used for focusing; The X-direction and Y-direction adjustment units (3) are rotatably connected to the semi-transparent and semi-reflective mirror group (4) and are used to adjust the light spot angle of the end of the optical fiber array end (1) in the body of the two IFU common space adjustment device.

2. The IFU common space adjustment device for the optical fiber array telescope according to claim 1, characterized in that: The ball head adjustment unit (2) comprises a ball head adjustment seat (15), a ball head rotating seat (16), a flange (17), a spherical gasket (18), a spring (19), a bolt (20) and a spherical nut (21); the main structure of the ball head adjustment seat (15) and the ball head rotating seat (16) is cylindrical, and one end thereof is closed to form an arc surface, and the end of the arc surface is rotatably arranged in a spherical concave surface formed at one end of the ball head rotating seat (16); the through holes on the ball head adjustment seat (15) and the ball head rotating seat (16) correspond to the end of the optical fiber array end (1); the ball head adjustment seat (15) and the ball head rotating seat (16) are connected to the ball head adjusting seat (15) and the ball head rotating seat (16). The outer surface of the seat (15) and the outer surface of the ball head rotating seat (16) are both connected with three connecting ears. The connecting ears on the ball head adjusting seat (15) and the connecting ears on the ball head rotating seat (16) are connected by bolts (20) and spherical nuts (21). A spring (19) is sleeved on the bolt (20) between the connecting ears on the ball head adjusting seat (15) and the connecting ears on the ball head rotating seat (16) for elastically tightening the connection between the ball head adjusting seat (15) and the ball head rotating seat (16). At the same time, a spherical gasket (18) is inserted between the tail of the bolt (20) and the corresponding connecting ear.

3. The IFU common space adjustment device for the optical fiber array telescope according to claim 1 or 2, characterized in that: The X-direction and Y-direction adjustment unit (3) comprises an X-direction movable platform (22), a Y-direction movable platform (23), a Y-direction rail (24), a Y-direction slider (25), an X-direction rail (26), an X-direction slider (27), a translation base (28), a positioning bracket (29), and an adjustment component (32); two opposite sides of the Y-direction movable platform (23) are respectively fixedly connected to the Y-direction rail (24); the Y-direction slider (25) is slidably connected to the Y-direction rail (24); the Y-direction slider (25) is fixedly connected to the translation base (28) through a bracket; two opposite sides of the X-direction movable platform (22) are respectively fixedly connected to the X-direction rail (26); the X-direction slider (27) is fixedly connected to the translation base (28) through a bracket; An X-direction slider (27) is slidably connected to the X-direction track (26), and the X-direction slider (27) is fixedly connected to the Y-direction movable platform (23) through a bracket. The X-direction track (26) and the Y-direction slider (25) are vertically arranged in space; an adjustment component (32) consistent with the adjustment direction of the X-direction movable platform (22) is arranged on the side of the X-direction movable platform (22), and the adjustment component (32) on the side of the X-direction movable platform (22) is connected to the Y-direction movable platform (23) through a bracket; an adjustment component (32) consistent with the adjustment direction of the Y-direction movable platform (23) is also arranged on the side of the Y-direction movable platform (23), and the adjustment component (32) on the side of the Y-direction movable platform (23) is connected to the translation base (28) through a bracket.

4. The IFU common space adjustment device for the optical fiber array telescope according to claim 3, characterized in that: A hollow shaft (341) is arranged at the top of the lens group housing (34) of the semi-transparent and semi-reflective mirror group (4); the hollow shaft (341) is rotatably connected to the central circular hole of the translation base (28); a positioning bracket (29) is fixedly connected to the bottom of the translation base (28); the positioning bracket (29) is positioned and arranged on the outer surface of the semi-transparent and semi-reflective mirror group (4) through an adjustment component (32). A limit baffle (33) is fixedly connected to the outer surface of the lens group housing (34) of the semi-transparent and semi-reflective mirror group (4); the limit baffle (33) is used to be arranged perpendicularly to the adjustment component (32) on the positioning bracket (29); and positioning is achieved by the adjustment component (32) contacting the limit baffle (33).

5. The IFU common space adjustment device for the optical fiber array telescope according to claim 4, characterized in that: Each of the adjustment components (32) comprises a fixing nut (30) and a screw assembly (31), wherein the fixing nut (30) is fixedly connected to the corresponding bracket, and the screw assembly (31) is threadedly connected to the corresponding fixing nut (30). By rotating the corresponding screw assembly (31), the movement of the corresponding X-direction movable platform (22) relative to the Y-direction movable platform (23) and the movement of the X-direction movable platform (22) and the Y-direction movable platform (23) relative to the translation base (28) are achieved, thereby achieving adjustment on the plane formed by the XY directions.

6. The IFU common space adjustment device for the optical fiber array telescope according to claim 5, characterized in that: The screw assembly (31) comprises a knob (311), an adjusting screw (312) and a ball (313); one end of the adjusting screw (312) is fixedly connected to the knob (311), and the other end of the adjusting screw (312) is open and is provided with the ball (313).

7. The IFU common space adjustment device for a fiber array telescope according to claim 6, characterized in that: The semi-transparent and semi-reflective mirror group (4) comprises a mirror group housing (34), an upper frame (35), a semi-transparent and semi-reflective mirror (36) and a lower frame (37); the mirror group housing (34) is a cylindrical structure and both ends of the structure are located on the path of the incident light path; the semi-transparent and semi-reflective mirror (36) is arranged in the mirror group housing (34); the semi-transparent and semi-reflective mirror (36) is clamped by the upper frame (35) and the lower frame (37) located on the front and back sides thereof; the upper frame (35) is also fixedly connected in the mirror group housing (34) by corresponding screws.

8. The IFU common space adjustment device for the optical fiber array telescope according to claim 7, characterized in that: The z-direction adjustment unit (5) comprises a z-direction adjustment seat (8), a sealing gasket (9), a sliding sleeve (10), a z-direction slider (12), a z-direction rail (13) and a fixing plate (14); one end of the sliding sleeve (10) is slidably connected inside the z-direction adjustment seat (8); the other end of the sliding sleeve (10) is fixedly connected to the end of the lens assembly housing (34) by means of screws; a plurality of vertical z-direction rails (13) are fixedly connected to the surface of the sliding sleeve (10); the z-direction slider (12) is slidably connected to the z-direction rail (13); the z-direction slider (12) is slidably connected to the z-direction adjustment seat (8); A sealing gasket (9) is arranged between the z-direction adjustment seat (8) and the sliding sleeve (10) on the inner wall of the seat (8), and the sealing gasket is a rubber gasket cut to fit the gap between the two; a plurality of fixing plates (14) are arranged on the side of the z-direction adjustment seat (8), and a sliding groove (11) arranged along the z-direction is provided on the fixing plate (14), and a bolt is correspondingly arranged at the sliding groove (11) and the bolt is fixedly connected to the z-direction adjustment seat (8), and the bolt at the locking sliding groove (11) is fixed, and the fixing plate (14) is also provided with a circular hole and is fixedly connected to the surface of the lens group housing (34) by corresponding screws.

9. The IFU common space adjustment device for a fiber array telescope according to claim 8, characterized in that: A plug hole is provided on the side of the z-direction adjustment seat (8), and a filter assembly (6) is slidably connected in the plug hole. The filter assembly (6) comprises a sliding frame (43), and a step hole is provided on the sliding frame (43). The filter (44) is pressed tightly in the step hole by a pressing ring (45), that is, the diameter of the filter (44) is equal to the diameter of the large hole in the step hole.

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