CN102854604A - Telescope primary mirror center radial positioning mechanism and assembly and adjustment method thereof - Google Patents
Telescope primary mirror center radial positioning mechanism and assembly and adjustment method thereof Download PDFInfo
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- CN102854604A CN102854604A CN2012103129072A CN201210312907A CN102854604A CN 102854604 A CN102854604 A CN 102854604A CN 2012103129072 A CN2012103129072 A CN 2012103129072A CN 201210312907 A CN201210312907 A CN 201210312907A CN 102854604 A CN102854604 A CN 102854604A
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Abstract
The invention discloses a telescope primary mirror center radial positioning mechanism and an assembly and adjustment method thereof, relating to the technical field of primary mirror support and solving the problem that the existing positioning mechanism cannot accurately position the primary mirror of a telescope. The mechanism is located at a center hole of the primary mirror and comprises a mandrel fixed on a base and a shaft sleeve sleeved outside the mandrel; the shaft sleeve is in glue joint with the primary mirror; a flexible positioning head is fixed on the mandrel and mainly comprises a positioning block and a ring connected together; at least three positioning blocks are uniformly distributed on the ring; the inner surface of each positioning block is a ring convex surface which is in ring line contact with the inclined plane of a wedge block, and the outer surface is an arc surface which is in ring line contact with the inner surface of the shaft sleeve; an adjustment gasket is connected with the ring through a pre-tightening screw and corresponds to each positioning block; the wedge block is mounted at the upper part of the adjustment gasket through a pre-tightening screw, and the inclined plane of the wedge block is in contact with the inner surface of the positioning block; and the part between the positioning block and the ring is a flexible link. The mechanism does not generate over-positioning and additional stress and has high precision.
Description
Technical field
The present invention relates to primary mirror support technology field, be specifically related to a kind of telescope primary mirror radial positioning mechanism of center and Method of Adjustment thereof.
Background technology
Telescope is the important means in the astronomical sight, its performance is just determining the size in the cosmic space that people can observe, primary mirror then is the key optical element in the telescopic system, and its bearing accuracy and surface precision have directly determined telescopical image quality.The primary mirror center is with center pit, and self is with certain thickness, and thickness matches with sleeve length, and detent mechanism then is arranged in the center pit of primary mirror.
In the desirable telescope center radial positioning device, axle only plays certralizing ability, minute surface is not produced extra-stress, and total should be conducive to debug, and does not produce again the location and interferes.
Granted publication day is on 02 08th, 2012, and the patent No. is that the Chinese invention patent of ZL201010588996.4 discloses a kind of radial positioning mechanism of center of optical element, and this mechanism comprises central shaft, axle sleeve, distensible ring, pretension screw, loosens screw; Described distensible ring is made of the regulating ring that connects as one and flexible ring; Central shaft is fixed on the pedestal, cooperates by circular conical surface between its top and the flexible ring inside surface; The outside surface of flexible ring is cambered surface, and this cambered surface forms loop line with the inside surface of axle sleeve and contacts; Central shaft, flexible ring and axle sleeve are embedded in the center pit of optical element, and the outside surface of axle sleeve and optical element splicing; Regulating ring is connected by the pretension screw with central shaft, rotates the distance between pretension screw capable of regulating regulating ring and the central shaft, makes flexible ring and central shaft interference fit; Loosen screw and be threaded with regulating ring, its front end pushes up on the central shaft, and screw is loosened in adjusting can make flexible ring and central shaft clearance fit.When screwing the pretension screw, add axial force to regulating circulating application, the axial distance of itself and central shaft is furthered, thereby make the flexible ring swelling and axle sleeve is applied radial force; Excessive when tension force, when need to loosen, screw and loosen screw, central shaft is applied axial force, make the axial distance of regulating ring and central shaft become large, cooperating between flexible ring and the central shaft loosened.
Above-mentioned detent mechanism is by the cooperation degree of tightness between pretension screw adjusting flexible ring and the central shaft, it has following shortcoming: can not guarantee that the first, the spreading deflection that flexible ring is made use at each pretension screw equates, just can't guarantee that also the flexible ring external diameter equates with sleeve diameter, the difference of each section of flexible ring spreading amount is introduced extra-stress to primary mirror easily; The second, the cooperation that can not accurately control flexible ring and central shaft is interference fit or clearance fit, has the problem of not only locating but also supporting, and all can affect to bearing accuracy and the surface precision of primary mirror.
Summary of the invention
Can not implement pinpoint problem to the telescope primary mirror in order to solve existing detent mechanism, the invention provides a kind of telescope primary mirror radial positioning mechanism of center and Method of Adjustment thereof.
The present invention is that the technical scheme that adopts of technical solution problem is as follows:
A kind of telescope primary mirror radial positioning mechanism of center, this mechanism is positioned at the center pit of primary mirror, comprising:
Be fixed on the axle on the pedestal;
Be sleeved on the axle sleeve of axle outside;
Be splicing between axle sleeve and the primary mirror,
Also comprise: flexible positioning head, wedge and adjustment pad,
Described flexible positioning head is fixed on the axle, mainly is comprised of the locating piece that links into an integrated entity and annulus;
Described at least three locating pieces are distributed on the annulus, and its inside surface is the annulus convex surface, with between the inclined-plane of wedge for loop line contacts, outside surface is arc surface, and contacts for loop line between the axle sleeve inside surface;
Described adjustment pad links to each other with annulus by the pretension screw and is corresponding with each locating piece, and described wedge is installed in the top of adjusting pad by the pretension screw, and its inclined-plane contacts with the inside surface of locating piece;
Part between described locating piece and the described annulus is flexible link, and micro-deformation can occur.
Described axle, axle sleeve, flexible positioning head, wedge and adjustment pad all adopt the low thermal expansion metal.
The number of described locating piece is six.
Be provided with on the described wedge and pretension screw and the screw that loosens screw fit.
The Method of Adjustment of telescope primary mirror radial positioning mechanism of center, the concrete steps of this Method of Adjustment are as follows:
Use simulation annulus and turntable as auxiliary adjustment equipment, the external diameter of simulation annulus is identical with sleeve diameter, to simulate first annulus and be connected on the turntable, coaxial with turntable by observing the first micrometer head reading adjustment simulation annulus, keep the first micrometer head invariant position and record its reading;
Unload the Imitating annulus, load onto axle, coaxial with turntable by observing the second micrometer head reading adjustment axle, second micrometer head of dismantling;
Be loaded on flexible positioning head and wedge, the first micrometer head is contacted with the exterior arc surface of each locating piece respectively, adjust the position of wedge, the reading that makes the first micrometer head is with to adjust the reading of simulation annulus when coaxial with turntable identical, and contact outside diameter and the sleeve diameter of flexible positioning head are identical at this moment;
Record each wedge bottom this moment is to the distance between the annulus of flexible positioning head bottom, and carry out mark, each adjusts the thickness of pad according to these value reconditionings, each parts that above-mentioned adjusted is good are pulled down from turntable at last, each parts are installed to the relevant position according to corresponding relation in the center pit of primary mirror.
The invention has the beneficial effects as follows: telescope primary mirror radial positioning mechanism of center of the present invention is by by the measure-alike simulation annulus of outside dimension and sleeve diameter, the internal diameter of adjusting the contact outside diameter of flexible positioning head and axle sleeve is identical, each adjusts the actual (real) thickness of pad reconditioning, determine the axial location of wedge by adjusting pad, no longer the wedge upper-lower position is adjusted behind the good pad of reconditioning, realized that radial positioning mechanism is disposable to be in place; Be line between the inclined-plane of flexible positioning head and wedge and the axle sleeve inside surface and contact, avoided the generation of mistake positioning phenomenon in the face contact, make not produce interference fit between flexible positioning head and the axle sleeve, avoided when assembling, primary mirror being introduced extra-stress; Flexible positioning head distending only produces radial motion, only plays the radial location effect, has avoided the uppity defective of pretension screw moment size on the wedge, minute surface is not introduced additional axial stress, can not introduce aberration to optical system, and precision is higher.
Telescope primary mirror radial positioning mechanism of center of the present invention is applicable to all with the telescope primary mirror center radial location of center pit, because modern telescope adopts reflective optical structure more, the primary mirror multi-band has center pit, so practicality of the present invention is very strong.
This mechanism in use only locates and does not support, and meets desirable center location structure principle of design.
Description of drawings
Fig. 1 is the front view of telescope primary mirror radial positioning mechanism of center of the present invention;
Fig. 2 is the partial enlarged drawing among Fig. 1;
Fig. 3 is the vertical view among Fig. 1;
Fig. 4 is the structural representation of flexible positioning head;
Fig. 5 is the assembling synoptic diagram of telescope primary mirror radial positioning mechanism of center of the present invention;
Fig. 6 is for adjusting the simulation annulus synoptic diagram coaxial with turntable;
Fig. 7 is for adjusting the flexible positioning head contact outside diameter synoptic diagram identical with sleeve diameter.
Among the figure: 1, axle, 2, axle sleeve, 3, flexible positioning head, 3-1, locating piece, 3-2, annulus, 3-3, flexible link, 4, wedge, 5, adjust pad, 6, the pretension screw, 7, the simulation annulus, 8, primary mirror, 9, turntable, 10, pedestal, the 11, first micrometer head, the 12, second micrometer head.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
A kind of telescope primary mirror radial positioning mechanism of center of the present invention, as shown in Figure 1, this mechanism is positioned at the center pit of primary mirror 8, mainly comprise axle 1, axle sleeve 2, flexible positioning head 3, wedge 4, adjust pad 5 and pretension screw 6, axle 1 is fixed on the pedestal 10, and axle sleeve 2 is sleeved on axle 1 outside, between leave the space, for glueing joint, flexible positioning head 3 is installed on the axle 1 between axle sleeve 2 and the primary mirror 8;
As shown in Figure 4, flexible positioning head 3 mainly is comprised of locating piece 3-1 and annulus 3-2, six locating piece 3-1 be distributed on the annulus 3-2 surface and and annulus 3-2 link into an integrated entity, locating piece 3-1 inside surface is the annulus convex surface, with contact for loop line between the inclined-plane of wedge 4, locating piece 3-1 outside surface is arc surface, and contacts for loop line between axle sleeve 2 inside surfaces; Annulus 3-2 surface arranges porose, by hole and cooperating of screw flexible positioning head 3 integral body being fixed on the axle 1; Thinner part is flexible link 3-3 between locating piece 3-1 and the annulus 3-2, and micro-deformation can occur;
As shown in Figure 5, be provided with on the wedge 4 and pretension screw 6 and the screw that loosens screw fit, wedge 4 inside surfaces cooperate with axle 1 outside surface, the centre position of adjusting pad 5 is provided with the screw that cooperates with pretension screw 6, wedge 4 be connected pad 5 and all be connected with annulus 3-2 on the flexible positioning head 3 by pretension screw 6, adjust the lower end that pad 5 is positioned at wedge 4, namely install first and adjust pad 5 on annulus 3-2, wedge 4 is being installed on adjustment pad 5, rotation pretension screw 6 and the position of loosening screw capable of regulating wedge 4, thereby adjust each wedge 4 position and make radially distending of flexible positioning head 3, contact outside diameter and axle sleeve 2 internal diameters of flexible positioning head 3 are identical, can guarantee when assembling flexible positioning head 3 with axle sleeve 2 between do not produce interference fit, avoid primary mirror 8 introducing extra-stresses.
The Method of Adjustment of telescope primary mirror radial positioning mechanism of center of the present invention comprises: demarcation and the set-up procedure in early stage, comprise the demarcation of axle 1 position, and the reconditioning of pad 5 is adjusted in the demarcation of flexible positioning head 3 positions;
The concrete steps of this Method of Adjustment are as follows:
The demarcation of axle 1 position: as shown in Figure 6, adopt simulation annulus 7 and turntable 9 as auxiliary adjustment equipment, the external diameter Φ d of simulation annulus 7 is identical with axle sleeve 2 internal diameter Φ D, position to simulation annulus 7 is demarcated, to simulate first annulus 7 is connected by screw on the turntable 9, adjust the position of the first micrometer head 11, make the first micrometer head 11 identical with axle sleeve 2 inside surface contact positions with flexible positioning head 3 with simulation annulus 7 outside surface contact positions, fix the first micrometer head 11, it is coaxial with turntable 9 to observe the first micrometer head 11 reading adjustment simulation annulus 7, at this moment, the first micrometer head 11 readings are designated as d1; As shown in Figure 7, keep the first micrometer head 11 invariant positions, unload Imitating annulus 7, load onto axle 1, adjust the position of the second micrometer head 12, it is contacted with the axle outside surface, observe the second micrometer head 12 readings, until its reading is constant, can think that axle 1 is coaxial with turntable 9 at this moment, stationary spindle 1;
The demarcation of flexible positioning head 3 positions: second micrometer head 12 of dismantling, load onto successively more flexible positioning head 3, adjust pad 5 and wedge 4, make the first micrometer head 11 contact successively the cylindrical contact with each locating piece 3-1, observe the first micrometer head 11 readings, adjust each wedge 4 position and make radially distending of flexible positioning head 3, six readings that make the first micrometer head 11 all are d1, at this moment, contact outside diameter and axle sleeve 2 internal diameters of flexible positioning head 3 are identical, can guarantee when assembling flexible positioning head 3 with axle sleeve 2 between do not produce interference fit, avoid primary mirror 8 introducing extra-stresses;
Adjust the reconditioning of pad 5: at first wedge 4 bottoms are demarcated to the distance of flexible positioning head 3 bottom annulus 3-2, as shown in Figure 7, accurately measured each wedge 4 bottom to the distance L between the flexible positioning head 3 bottom annulus 3-2
i, i=1,2 wherein ... 6, and carry out mark; Six measured value L
i(i=1,2 ... certain difference is arranged 6), and each adjusts the thickness of pad 5 by the reconditioning of these six values;
Each parts that above-mentioned adjusted is good are pulled down from turntable 9 at last, in the center pit of primary mirror 8, each parts is installed to the relevant position according to corresponding relation, realizing that radial positioning mechanism of center is disposable is in place, reconditioning is no longer adjusted after adjusting well the thickness of pad 5, can realize disposable debuging, the flexible positioning head 3 contact outside diameters of strict guarantee are identical with axle sleeve 2 internal diameters, and flexible positioning head 3 radially only produces radial motion during distending, minute surface is not introduced extra-stress, precision is higher.
Claims (5)
1. telescope primary mirror radial positioning mechanism of center, this mechanism is positioned at the center pit of primary mirror (8), comprising:
Be fixed on the axle (1) on the pedestal (10);
Be sleeved on the outside axle sleeve (2) of axle (1);
Be splicing between axle sleeve (2) and the primary mirror (8),
It is characterized in that, also comprise: flexible positioning head (3), wedge (4) and adjustment pad (5),
Described flexible positioning head (3) is fixed on the axle (1), mainly is comprised of the locating piece that links into an integrated entity (3-1) and annulus (3-2);
Described at least three locating pieces (3-1) are distributed on the annulus (3-2), and its inside surface is the annulus convex surface, with between the inclined-plane of wedge (4) for loop line contacts, outside surface is arc surface, and contacts for loop line between axle sleeve (2) inside surface;
Described adjustment pad (5) links to each other with annulus (3-2) by pretension screw (6) and is corresponding with each locating piece (3-1), described wedge (4) is installed in the top of adjusting pad (5) by pretension screw (6), and its inclined-plane contacts with the inside surface of locating piece (3-1);
Part between described locating piece (3-1) and the described annulus (3-2) is flexible link (3-3), and micro-deformation can occur.
2. telescope primary mirror radial positioning mechanism of center according to claim 1 is characterized in that, described axle (1), axle sleeve (2), flexible positioning head (3), wedge (4) and adjustment pad (5) all adopt the low thermal expansion metal.
3. telescope primary mirror radial positioning mechanism of center according to claim 1 is characterized in that, the number of described locating piece (3-1) is six.
4. telescope primary mirror radial positioning mechanism of center according to claim 1 is characterized in that, is provided with pretension screw (6) on the described wedge (4) and loosens the screw of screw fit.
5. the Method of Adjustment of telescope primary mirror radial positioning mechanism of center as claimed in claim 1 is characterized in that, the concrete steps of this Method of Adjustment are as follows:
Use simulation annulus (7) and turntable (9) as auxiliary adjustment equipment, the external diameter of simulation annulus (7) is identical with axle sleeve (2) internal diameter, to simulate first annulus (7) is connected on the turntable (9), coaxial with turntable (9) by observing the first micrometer head (11) reading adjustment simulation annulus (7), keep the first micrometer head (11) invariant position and record its reading;
Unload Imitating annulus (7), load onto axle (1), coaxial with turntable (9) by observing the second micrometer head (12) reading adjustment axle (1), the second micrometer head (12) of dismantling;
Be loaded on flexible positioning head (3) and wedge (4), the first micrometer head (11) is contacted with the exterior arc surface of each locating piece (3-1) respectively, adjust the position of wedge (4), the reading that makes the first micrometer head (11) is with to adjust the reading of simulation annulus (7) when coaxial with turntable (9) identical, and contact outside diameter and axle sleeve (2) internal diameter of flexible positioning head (3) are identical at this moment;
Record each wedge this moment (4) bottom is to the distance between flexible positioning head (3) the bottom annulus (3-2), and carry out mark, each adjusts the thickness of pad (5) according to these value reconditionings, each parts that above-mentioned adjusted is good are pulled down from turntable (9) at last, each parts are installed to the relevant position according to corresponding relation in the center pit of primary mirror (8).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210312907.2A CN102854604B (en) | 2012-08-29 | 2012-08-29 | Telescope primary mirror center radial positioning mechanism and assembly and adjustment method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210312907.2A CN102854604B (en) | 2012-08-29 | 2012-08-29 | Telescope primary mirror center radial positioning mechanism and assembly and adjustment method thereof |
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| CN102854604A true CN102854604A (en) | 2013-01-02 |
| CN102854604B CN102854604B (en) | 2014-11-19 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399389A (en) * | 2013-07-30 | 2013-11-20 | 中国科学院长春光学精密机械与物理研究所 | Primary mirror floating support mechanism with positioning film |
| CN104898252A (en) * | 2015-05-22 | 2015-09-09 | 中国科学院长春光学精密机械与物理研究所 | Aerial camera Cassegrain primary and secondary mirror supporting structure |
| CN106842495A (en) * | 2016-12-28 | 2017-06-13 | 中国科学院长春光学精密机械与物理研究所 | A kind of large telescope primary mirror chamber system mounting and positioning device and method |
| CN106932882A (en) * | 2015-12-31 | 2017-07-07 | 上海微电子装备有限公司 | A kind of positioning and mounting structure of ellipsoidal reflector |
| CN109387114A (en) * | 2018-10-18 | 2019-02-26 | 重庆长安工业(集团)有限责任公司 | A kind of big trunnion configuration of adaptive machining error |
| CN110146975A (en) * | 2019-06-19 | 2019-08-20 | 中科院南京耐尔思光电仪器有限公司 | Telescope primary mirror center positioning mechanism |
| CN110441880A (en) * | 2019-08-08 | 2019-11-12 | 安庆师范大学 | A kind of radial positioning mechanism of center of optical element |
| CN113472437A (en) * | 2021-08-23 | 2021-10-01 | 东方红卫星移动通信有限公司 | Primary mirror part suitable for optical antenna of space communication terminal |
| CN113576400A (en) * | 2021-08-04 | 2021-11-02 | 重庆远视科技有限公司 | Slit-lamp microscope and diaphragm adjusting device thereof |
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| CN102436054A (en) * | 2011-12-29 | 2012-05-02 | 中国科学院长春光学精密机械与物理研究所 | Composite primary reflector supporting device for large telescope |
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| JP2001021790A (en) * | 1999-07-02 | 2001-01-26 | Ishikawajima Harima Heavy Ind Co Ltd | Device for adjusting optical element angle for optical instrument |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399389A (en) * | 2013-07-30 | 2013-11-20 | 中国科学院长春光学精密机械与物理研究所 | Primary mirror floating support mechanism with positioning film |
| CN104898252A (en) * | 2015-05-22 | 2015-09-09 | 中国科学院长春光学精密机械与物理研究所 | Aerial camera Cassegrain primary and secondary mirror supporting structure |
| CN106932882B (en) * | 2015-12-31 | 2020-08-04 | 上海微电子装备（集团）股份有限公司 | Positioning and mounting structure of ellipsoidal reflector |
| CN106932882A (en) * | 2015-12-31 | 2017-07-07 | 上海微电子装备有限公司 | A kind of positioning and mounting structure of ellipsoidal reflector |
| CN106842495A (en) * | 2016-12-28 | 2017-06-13 | 中国科学院长春光学精密机械与物理研究所 | A kind of large telescope primary mirror chamber system mounting and positioning device and method |
| CN106842495B (en) * | 2016-12-28 | 2019-04-23 | 中国科学院长春光学精密机械与物理研究所 | A kind of large telescope primary mirror chamber system mounting and positioning device and method |
| CN109387114A (en) * | 2018-10-18 | 2019-02-26 | 重庆长安工业(集团)有限责任公司 | A kind of big trunnion configuration of adaptive machining error |
| CN110146975A (en) * | 2019-06-19 | 2019-08-20 | 中科院南京耐尔思光电仪器有限公司 | Telescope primary mirror center positioning mechanism |
| CN110146975B (en) * | 2019-06-19 | 2023-05-12 | 中科院南京耐尔思光电仪器有限公司 | Telescope primary mirror center positioning mechanism |
| CN110441880A (en) * | 2019-08-08 | 2019-11-12 | 安庆师范大学 | A kind of radial positioning mechanism of center of optical element |
| CN113576400A (en) * | 2021-08-04 | 2021-11-02 | 重庆远视科技有限公司 | Slit-lamp microscope and diaphragm adjusting device thereof |
| CN113576400B (en) * | 2021-08-04 | 2024-05-28 | 重庆远视科技有限公司 | Slit lamp microscope and diaphragm adjusting device thereof |
| CN113472437A (en) * | 2021-08-23 | 2021-10-01 | 东方红卫星移动通信有限公司 | Primary mirror part suitable for optical antenna of space communication terminal |
| CN113472437B (en) * | 2021-08-23 | 2023-04-14 | 东方红卫星移动通信有限公司 | Primary mirror part suitable for optical antenna of space communication terminal |
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