CN2733390Y

CN2733390Y - One-way differential regulating mechanism for 45 degree reflecting mirror

Info

Publication number: CN2733390Y
Application number: CN 200320131508
Authority: CN
Inventors: 杜俊峰; 张林波; 任戈
Original assignee: Institute of Optics and Electronics of CAS
Current assignee: Institute of Optics and Electronics of CAS
Priority date: 2003-12-29
Filing date: 2003-12-29
Publication date: 2005-10-12
Anticipated expiration: 2013-12-29

Abstract

The utility model relates to a one-way differential regulating mechanism for a 45 degrees reflecting mirror, belonging to improvement of the regulating mechanism of the 45 degrees reflecting mirror. The one-way differential regulating mechanism for a 45 degrees reflecting mirror characterized by that a mandrel for positioning decreases the drift of a light spot and raises the carrying capacity. A differential screw is arranged on the back surface of a reflecting mirror to realize finely regulating the reflecting mirror in single direction. The structure can realize the regulation in two rotations and one translation three directions. The one-way differential regulating mechanism for a 45 degrees reflecting mirror has convenient regulation, high regulating accuracy and good stability towards a 45 degrees reflecting mirror for turning optical axis. Differential thread adopts metric and English system for pairing, so the difficulty in processing non-standard thread pitch is reduced.

Description

45 ° of catoptron mono-direction differential adjusting mechanisms

Affiliated technical field

The utility model designs a kind of 45 ° of catoptron precision adjustment units, belongs to the improvement to 45 ° of reflector adjusting apparatus.

Background technology

In the large telescope system, because physical dimension is huge, so that mismachining tolerance is accumulated is also very big, and the requirement of the installation site of each optical element is very strict, solve this contradiction, can not pass through merely to improve machining precision, and will satisfy the relative position requirement by adjusting mechanism.For finishing predetermined optical axis turnover, 45 ° of catoptrons often use in the large telescope system, and are a lot of to its adjusting mechanism, but exist the problem that adjustment is not easy and the luminous point drift is bigger.

The utility model content

Technology of the present utility model is dealt with problems: overcome the deficiencies in the prior art, a kind of requirement that the light path turnover is adjusted in the large telescope system that adapts to is provided, design operation is convenient, adjusts the precision height, 45 ° of catoptron mono-direction differential adjusting mechanisms of good stability.

Specific implementation of the present utility model is: 45 ° of catoptron mono-direction differential adjusting mechanisms, comprise picture frame, its characteristics are: also comprise mandrel, locating sleeve, side arm, after-frame, connect spring, the extension spring cover, guide finger, the top nail, two the tack seats and the seat of slotting, differential screw, side arm is positioned on the after-frame to be held, after-frame is positioned at the bottom, mandrel is positioned on the axis of after-frame and side arm middle, locating sleeve and two tack seats and the seat of slotting are fixed on the side arm, connecting spring is connected between side arm and the after-frame by the extension spring cover, extension spring is set on the after-frame, guide finger is inserted in extension spring and puts, and top nail and differential screw join by guide finger.It adjusts principle: by rotating three differential screws, make the top nail realize moving under the guiding of guide finger, and then promote moving component and move, realize two rotation and translations around the mandrel bulb.

The utility model compared with prior art has following advantage: (1) adds mandrel in adjusting mechanism, improve load-bearing capacity, and the bulb of mandrel reduces the drift of luminous point near mirror surface; (2) operating position is all at the back side of catoptron, avoids when adjusting, and damages, the scratch minute surface; (3) only need to adjust the adjustment that three differential screws just can be realized three degree of freedom (translation of two rotations), adjust easy; (4) adjust precision height, good stability; (5) differential thread adopts pairing public, made in Great Britain, has reduced a processing difficult problem that is produced by non-standard pitch.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is connection spring, the extension spring cover among Fig. 1, the local enlarged diagram of guide finger;

Fig. 3 is 45 ° of structural representations for connection spring in the utility model;

Fig. 4 is 45 ° of structural front view for side arm in the utility model;

Fig. 5 is the vertical view of Fig. 4;

Fig. 6 is the structural front view of after-frame in the utility model;

Fig. 7 is the vertical view of Fig. 6;

Fig. 8 is the structural front view of differential screw in the utility model;

Fig. 9 is the side view of Fig. 8;

Figure 10 is the tack holder structure front view in the utility model;

Figure 11 is the side view of Figure 10;

Figure 12 is a fluting holder structure front view of the present utility model;

Figure 13 is the side view of Figure 12.

Embodiment

As shown in Figure 1, 2, the utility model by picture frame 1, mandrel 2, locating sleeve 3, side arm 4, after-frame 5, connect spring 6, extension spring cover 7, guide finger 8, differential screw 9, top nail 10, tack seat 11 and fluting seat 12 and constitute, wherein picture frame 1, side arm 4, locating sleeve 3 peaceful headstocks 11, fluting seat 12 constitute moving components; After-frame 5 is moving part not; Differential screw 9 and top nail 11 constitute adjustment component.

Side arm 4 is positioned at end on the after-frame 5, after-frame 5 is positioned at the bottom, mandrel 2 is positioned on the axis of after-frame 5 and side arm 4 middles, locating sleeve 3 and two tack seats 11 and the seat 12 of slotting are fixed on the side arm 4, connecting spring 6 is connected between side arm 5 and the after-frame 4 by extension spring cover 7, extension spring cover 7 is loaded on the after-frame 5, and guide finger 8 is inserted on the extension spring cover 7, and top nail 10 and differential screw 9 join by guide finger 8.

Coordinate system only provides x axle and y direction of principal axis as shown in Figure 7 among the figure, the z direction of principal axis meets right-hand rule, along the axis direction of mandrel.Number in the figure A, B, C represent the installation site of differential screw 9, and evenly distribute along circumference, and wherein A is on the x axle, and B and C are symmetrical in the x axle.

In this mechanism, the effect of mandrel 2 is effects of bearing load and centering; Connect spring 6 and be and to keep pushing up nail 10 and contact with the suitable of moving component; Side arm 4 is not only the substrate of moving component and is Weight plate, and the center of gravity that guarantees moving component is on the centre of sphere of the bulb that drops on mandrel 2 on the z direction of principal axis; The rotation of the rich z axle of Contact Pair upstop of fluting seat 12 and top nail 10; Differential screw 9 realizes that the little of top nail 10 moves; The effect of extension spring cover 7 is to be convenient to mounting spring; After-frame 5 is the benchmark as relative motion.In adjusting mechanism, add mandrel 2, improved load-bearing capacity, the bulb of mandrel 2 is tried one's best near mirror surface, thereby reduce the drift of luminous point.

Be in course of adjustment, by rotation differential screw 9, top nail 10 is realized moving under the guiding of guide finger 8, and then promotes the moving component motion, realizes two rotation and translations (around x, the rotation of y axle and moving along the z axle) around the mandrel bulb.Concrete adjustment mode is as follows: (1) adjusts two differential screws that are installed in B, C position can realize that catoptron rotates along the y axle; (2) adjust a differential screw 9 that is installed in the A position and can realize that catoptron rotates along the x axle; (3) adjust three differential screws 9 that are installed in A, B, C position synchronously and can realize that catoptron is along the translation of z axle.

Claims

1. 45 ° of catoptron mono-direction differential adjusting mechanisms, comprise picture frame, it is characterized in that: also comprise mandrel, locating sleeve, side arm, after-frame, connect spring, the extension spring cover, guide finger, the top nail, two the tack seats and the seat of slotting, differential screw, side arm is positioned on the after-frame to be held, after-frame is positioned at the bottom, mandrel is positioned on the axis of after-frame and side arm middle, locating sleeve and two tack seats and the seat of slotting are fixed on the side arm, connecting spring is connected between side arm and the after-frame by the extension spring cover, extension spring is set on the after-frame, guide finger is inserted in extension spring and puts, and top nail and differential screw join by guide finger.