CN106383397B - Primary mirror installation and adjustment mechanism - Google Patents

Abstract

Primary mirror installation and adjustment mechanism,It is related to a kind of primary mirror installation and adjustment mechanism,The regulative mode for solving existing telescope primary mirror is complicated,Stability is bad and there is the problems such as axially and radially intercoupling,Speculum passes through on three support rims being bonded in fulcrum bearing,Primary mirror cell and fulcrum bearing are arranged concentrically,Adjustment component includes primary mirror cell's inserts by being embedded in primary mirror cell,It is embedded in the undertaking ball-and-socket of fulcrum bearing bottom,Adjustment screw in primary mirror cell's inserts is set,It is embedded in the screw rod ball-and-socket of adjustment screw upper end,Steel ball between undertaking ball-and-socket and screw rod ball-and-socket and the locking nut mounted on adjustment screw bottom,Locking assembly includes the roller being embedded in fulcrum bearing,Wraping plate on roller,Locking bulb and locking ball-and-socket on lock-screw and butterfly gasket,Mechanism of the present invention can adjust three degree of freedom,And main mirror face is not influenced.

Description

Primary mirror installation adjustment mechanism

technical field

The invention relates to a primary mirror installation and adjustment mechanism.

Background technique

The traditional primary mirror adjustment mechanism relies on mechanical repair methods or other less stable adjustment methods to realize the tilt adjustment of the optical axis position of the primary mirror during the assembly process of the primary mirror, and has the following defects:

1. The adjustment method is complicated, it will affect the mirror surface, and the requirements for the adjustment personnel are relatively high; and only a few degrees of freedom can be adjusted.

2. The stability is not good. The existing primary mirror is not well fixed, which affects the measurement accuracy. After the adjustment is completed, there may be subsequent jumps.

3. Axial and radial interference must be avoided during the adjustment process. When adjusting the tilt, it will bring about a lateral adjustment of the optical axis of the primary mirror.

4. Without isolation measures, the structural deformation of the installation base will affect the primary mirror.

Contents of the invention

The invention provides a primary mirror installation and adjustment mechanism for solving the problems of complex adjustment mode, poor stability, axial and radial mutual coupling of the existing telescope primary mirror.

The primary mirror installation adjustment mechanism includes a supporting seat, a primary mirror chamber, an adjustment assembly connecting the primary mirror chamber and the supporting seat, a locking assembly, and a flexible diaphragm assembly arranged between the primary mirror chamber and the supporting seat. The support base is supported on the boss; the main mirror chamber and the support base are concentrically arranged,

There are three sets of adjustment assemblies and locking assemblies, and they are evenly distributed along the circumference between the main mirror chamber and the support seat, and each set of locking assemblies is two, and each set of locking assemblies is located on both sides of the adjustment assembly;

Each group of adjustment components includes a main mirror chamber insert embedded in the main mirror chamber, a receiving ball socket embedded in the bottom of the support seat, an adjustment screw arranged in the main mirror chamber insert, and a screw embedded in the upper end of the adjustment screw. The screw ball socket, the steel ball installed between the receiving ball socket and the screw ball socket, and the lock nut installed at the bottom of the adjusting screw;

Each set of locking components includes a roller inlaid on the support seat, a seesaw installed on the roller, backing plates installed on both sides of the seesaw, two locking screws, and a lock installed on the locking screw. Tight ball head, locking ball socket and butterfly gasket. The flexible diaphragm assembly includes a flexible diaphragm, a fixed outer ring and a fixed inner ring. The outer ring of the flexible diaphragm is connected to the main mirror chamber through the fixed outer ring. The inner ring of the diaphragm is connected with the supporting seat through the fixed inner ring.

Beneficial effect of the present invention:

1. In the present invention, an adjusting assembly and a locking assembly are provided between the supporting seat and the main mirror chamber. The axial position is adjusted by three adjusting screws, and the position along the optical axis is adjusted by the butterfly spring and the seesaw in the locking assembly. , the butterfly spring cooperates with the rocker and the roller to play the role of pulling, and the adjusting screw plays the role of topping. This adjustment method can be called the three-top and six-pull adjustment method. This adjustment method is simple and convenient, and can realize three freedoms. The adjustment of the degree has no effect on the shape of the main mirror.

2. In the present invention, a locking assembly is provided on both sides of each adjustment assembly. The locking assembly realizes the locking of the supporting base through rollers and seesaws. The locking assembly applies preload through a butterfly spring. Two locking screws Installed on both sides of the seesaw, the bottom of the seesaw is provided with a cylindrical groove, the roller inlaid on the support seat is set in the cylindrical groove at the bottom of the seesaw, and the adjustment assembly can be adjusted by loosening a locking screw. The locking force of the two locking screws is evenly distributed in the roller through the rocker. This locking method can effectively prevent loosening and suffocation. The difference in locking force on the two locking screws will not affect the adverse effects caused by locking;

3. The present invention uses a flexible diaphragm to fix the primary mirror chamber and the supporting seat. The flexible diaphragm has high radial stiffness and low axial rigidity, and can eliminate the radial deviation of the supporting seat when the adjustment assembly is adjusted axially. It can also effectively improve the stress state at the connection between the adjustment component and the main mirror chamber during the adjustment process, prevent the position shift of the adjustment component during the locking process of the locking component after the adjustment is completed, and ensure that the adjustment process is simple, convenient and reliable ;

Description of drawings

Fig. 1 is the schematic diagram of primary mirror installation adjustment mechanism of the present invention;

Fig. 2 is the schematic diagram of removing the primary mirror and the flexible diaphragm of the primary mirror installation adjustment mechanism of the present invention;

Fig. 3 is a side sectional view of Fig. 1;

Fig. 4 is the top view of Fig. 3 (primary mirror has been removed);

Fig. 5 is the top view of Fig. 3 (primary mirror and flexible diaphragm have been removed);

Fig. 6 is the bottom view of Fig. 3;

FIG. 7 is a cross-sectional view of FIG. 4 .

In the figure: 1. Reflector, 2. Mounting screw, 3. Flexible diaphragm, 4. Support seat, 4-1. Support boss, 4-2. Glue guide groove, 5. Main mirror chamber, 5-1, The through hole opened at the bottom of the main mirror room for connecting the main mirror room and the adjustment assembly, 5-2, seam, 5-3, through hole, 6, fixed outer ring, 7, fixed inner ring, 8, seesaw , 8-1, threaded hole, 9, backing plate, 10, screw, 11, roller, 12, locking screw, 13, butterfly washer, 14, locking ball socket, 15, locking ball head, 16 , lock nut, 17, adjusting screw rod, 18, main mirror chamber insert, 19, screw ball socket, 20, steel ball, 21, undertake ball socket.

Detailed ways

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 1. This embodiment will be described in conjunction with FIGS. 1 to 7. The main mirror installation adjustment mechanism includes a reflector 1, a support seat 4, a main mirror chamber 5, an adjustment assembly connecting the main mirror chamber and the support seat, and a locking assembly. And the flexible diaphragm assembly arranged between the main mirror chamber and the support seat, as shown in Figure 3 and Figure 5, the reflector 1 is bonded on the support seat by three circumferentially uniform support bosses 4- 1, a rubber guide groove 4-2 is arranged on the supporting point. The support boss is located at 0.68 of the diameter of the bearing seat. The bottom of the primary mirror chamber 5 is provided with a through hole 5-1 opened at the bottom of the primary mirror chamber for connecting the primary mirror chamber 5 and the adjustment assembly. A through hole 5-3 for realizing the reference transfer, and for realizing the connection with the main mirror chamber.

This embodiment is described in conjunction with FIG. 4 , the flexible diaphragm 3 realizes the connection between the main mirror chamber 5 and the support seat 4 through the fixed outer ring 6 and the fixed inner ring 7, wherein the outer circumference and the inner circumference of the flexible diaphragm 3 are evenly distributed 6 light holes. The fixed outer ring 6 and the flexible diaphragm 3 are connected to the threaded hole of the main mirror chamber 5 through six radially symmetrically distributed light holes, and the fixed inner ring 7 and the flexible diaphragm 3 are connected through six radially symmetrically distributed light holes In the threaded hole of the supporting seat 4, the connection of the flexible diaphragm to the main mirror chamber and the supporting seat is realized by means of the fixed outer ring and the fixed inner ring, ensuring radial rigidity and achieving axial flexibility at the same time. It can eliminate the radial offset of the support seat when the adjustment component is adjusted axially, and can also effectively improve the stress state at the connection between the adjustment component and the primary mirror chamber during the adjustment process, preventing the adjustment from being damaged during the locking process of the locking component after the adjustment is completed. The position offset caused by the components ensures that the adjustment process is simple, convenient and reliable.

This embodiment is described with reference to FIG. 6 and FIG. 7 . This embodiment includes three sets of adjustment assemblies, and locking assemblies are distributed on both sides of each adjustment assembly. The three groups of adjustment components are evenly distributed on the main mirror chamber 5, and each adjustment assembly includes a main mirror chamber insert 18 inlaid on the main mirror chamber 5, a receiving ball socket 21 inlaid on the bottom of the support base 4, and a socket set on the main mirror chamber. The adjusting screw 17 in the mirror chamber insert, the screw ball socket 19 embedded in the upper end of the adjusting screw, the steel ball 20 installed between the receiving ball socket 21 and the screw ball socket 19, and the lock nut 16 installed at the bottom of the adjusting screw .

For each adjustment process, first loosen the lock nut 16, rotate the adjustment screw 17, and realize the up and down adjustment of the adjustment screw 17 through the main mirror chamber insert 18, together with the screw ball socket 19, the steel ball 20 and the receiving ball socket 21. The inclination adjustment of the bearing seat 4 is realized. The role of the steel ball, the receiving ball socket and the screw ball socket is to release the corresponding degrees of freedom to ensure that no local stress is introduced during adjustment.

This embodiment is described with reference to FIG. 5 and FIG. 7 . There are three sets of locking assemblies in this embodiment, which are distributed on both sides of the adjustment assembly. Each locking assembly includes a roller 11 inlaid on the support seat, a seesaw 8 installed on the roller, a backing plate 9 installed on both sides of the seesaw, a mounting screw 10 on the backing plate, The threaded hole 8-1 realizes two locking screws 12 threadedly connected, a locking ball head 15, a locking ball socket 14 and a butterfly washer 13 installed on the locking screws.

When adjusting the tilt of the primary mirror, first loosen the locking assembly. By turning the two locking screws 12 , by releasing the preload of the wing washer 13 , the subsequent adjustment is guaranteed to be smooth. The locking assembly locks the supporting base through rollers and seesaws. Two locking screws are installed on both sides of the seesaw. Cylindrical grooves are set at the bottom of the seesaw. In the cylindrical groove at the bottom of the board, loosen a locking screw to adjust the adjustment assembly. This structure is similar to a seesaw. The locking force of the two locking screws is evenly distributed in the roller through the seesaw. This locking method can effectively prevent loosening and suffocation. The lock on the two locking screws Differences in tightening force do not adversely affect locking. After the adjustment is completed, tighten the locking screw 12, the function of the locking ball head 15 and the locking ball socket 14 is that after the tilt adjustment, the main mirror chamber and the seesaw will have an inclination angle, and the locking ball head and the locking ball socket will have an inclination angle. This ensures that no additional stress is introduced during locking, and prevents locking errors from being brought to the adjustment components.

In this embodiment, three sets of adjustment components adjust the axial position, and the position along the optical axis is adjusted through the butterfly washer 13 and the seesaw 8 in the locking assembly. The butterfly washer 13 cooperates with the seesaw 8 and the roller 11 To the effect of pulling, adjust the locking screw 12 to play the role of top, this adjustment method can be called three-top six-pull adjustment method.

Claims (9)

1. primary mirror installation and adjustment mechanism, including fulcrum bearing (4), primary mirror cell (5), the adjustment for connecting primary mirror cell (5) and fulcrum bearing (4) Component, locking assembly and the flexible membrane component being arranged between primary mirror cell and fulcrum bearing, speculum (1) are bonded in fulcrum bearing (4) on support rim (4-1)；The primary mirror cell (5) and fulcrum bearing (4) are arranged concentrically, it is characterized in that；

The adjustment component and locking assembly are three groups, and the every group of locking group that be uniformly distributed along the circumference between primary mirror cell and support base Part is two, and every group of locking assembly is located at the both sides of adjustment component；

Every group of adjustment component includes by primary mirror cell's inserts (18) for being embedded in primary mirror cell, is embedded in fulcrum bearing (4) bottom The undertaking ball-and-socket (21) in portion, is embedded in adjustment screw (17) upper end at the adjustment screw (17) being arranged in primary mirror cell's inserts (18) The screw rod ball-and-socket (19) in portion is mounted on the steel ball (20) accepted between ball-and-socket (21) and screw rod ball-and-socket (19) and is mounted on adjustment The locking nut (16) of screw rod (17) bottom；

Every group of locking assembly includes the wraping plate for being embedded in the roller (11) in fulcrum bearing (4), being mounted on roller (11) (8), mounted on the backup plate (9) of wraping plate both sides, two lock-screws (12), the locking bulb being mounted on lock-screw (12) (15) and locking ball-and-socket (14) and butterfly gasket (13),

The flexible membrane component includes flexible membrane (3), fixed outer ring (6) and fixes inner ring (7), flexible membrane (3) Outer ring is connected by fixed outer ring (6) with primary mirror cell (5), and the inner ring of flexible membrane (3) passes through fixed inner ring (7) and fulcrum bearing (4) it connects.

2. primary mirror installation and adjustment according to claim 1 mechanism, it is characterised in that：Locking nut in the adjustment component (16) unthreaded hole and threaded hole of perforation are provided on, for realizing the locking fastening of locking nut (16).

3. primary mirror installation and adjustment according to claim 1 or 2 mechanism, it is characterised in that：Primary mirror cell's inserts (18) peace At the counter sink internal mounted in primary mirror cell (5), it is attached by screw, primary mirror cell's inserts (18) is flange-type structure, Inside has screw thread, the unthreaded hole there are three circle distribution is opened on flange outer ring, for realizing primary mirror cell's inserts (18) and primary mirror cell (5) be fixedly connected.

4. primary mirror installation and adjustment according to claim 3 mechanism, it is characterised in that：Adjustment screw (17) upper surface is set Screw rod ball-and-socket (19) is set, outside is provided with screw thread, is connect with primary mirror cell's inserts (18), realizes adjustment function, the tune Whole screw rod (17) lower face is provided with the hexagonal indentations of adjustment, for the insertion of spanner to facilitate the height of adjustment screw (17) High adjustment.

5. primary mirror installation and adjustment according to claim 4 mechanism, it is characterised in that；Bearing is embedded in the locking assembly Adjustment screw (17) in the rotation axis of roller (11) on seat (4) and the adjustment component intersects vertically.

6. primary mirror installation and adjustment according to claim 5 mechanism, it is characterised in that；The sticking up on roller (11) Adjustment screw (17) in the centre symmetry line of plate (8) and the rotation axis of the roller (11) and the adjustment component is vertical Intersection.

7. primary mirror installation and adjustment according to claim 6 mechanism, it is characterised in that；Described two lock-screw (12) installations Both ends in the wraping plate (8) are arranged by the butterfly gasket (13) in the bottom of primary mirror cell (5).

8. primary mirror installation and adjustment according to claim 7 mechanism, it is characterised in that；The outer ring of the flexible membrane (3) is logical The screw for crossing six circumference uniform distributions connects fixed outer ring (6) and primary mirror cell (5), and the inner ring of the flexible membrane (3) passes through six The screw of a circumference uniform distribution will fixed inner ring (7) and fulcrum bearing (4) connection.

9. primary mirror installation and adjustment according to claim 1 mechanism, it is characterised in that；It is arranged on the support rim (4-1) Glue groove (4-2) is led, the support rim (4-1) is located at the 0.68 of fulcrum bearing (4) diameter.