CN2211608Y

CN2211608Y - Precision optic adjuster with radial bearing

Info

Publication number: CN2211608Y
Application number: CN 94239918
Authority: CN
Inventors: 朱健强; 王国兴; 周根法; 范滇元; 邓锡铭
Original assignee: Shanghai Institute of Optics and Fine Mechanics of CAS
Current assignee: Shanghai Institute of Optics and Fine Mechanics of CAS
Priority date: 1994-12-28
Filing date: 1994-12-28
Publication date: 1995-11-01
Anticipated expiration: 2004-12-28

Abstract

The utility model relates to a precision optic adjuster with radial bearing, which is mainly used in the adjustment mechanism of optic precision. An inner fixation ring in ladder shape is positioned in the outer fixation ring connected with the adjustment mechanism, a radial bearing is buckled between the inner and outer fixation rings, a precision top pressure screw rod passes through screws which are evenly distributed on the round disk of the bottom step of the inner fixation ring, supporting and pressing on the radial bearing. The top pressure screw rod is adjusted to make the inner fixation ring to drive an optic element positioned in the ring to operate together to achieve the purpose of optic adjustment. The utility model has good steadiness of static or dynamic adjustment, simple structure and low member cost.

Description

Precision optic adjuster with radial bearing

The utility model is to adjust member about a kind of precision optics that has radial bearing.Be mainly used in the optical precision adjusting mechanism.

Prior art: in optics orientation adjustment mechanism in the past, extensively adopt the top to draw the flexible member of mode, so as to realizing mechanical adjustment.The flexible member of this adjusting mechanism is made of screw mandrel and extension spring (or torsion spring), and it realizes angle or displacement adjustment by the advance and retreat motion of screw mandrel and the opposition of spring.Weakness maximum in this mechanism is exactly its bad dynamic performance, along with the changeable mechanism of time will change.If three-dimension adjusting mechanism, overall volume is big, is difficult in the miniature device.(referring to document: 1.Newport Catalog, 1992, P.D1-E16; 2.Opto-Mechanical Systems Design, P.R.Yoder, Jr., Marcel Dekker, Inc., New York, 1986.)

This novel purpose is: adopt the key of doing in the precision optics adjusting mechanism as the radial bearing of standard component to adjust member.Make mechanism that good dynamic property can be arranged, adjusting mechanism in case adjust finishes, and just can keep stablizing constant for a long time, and radial bearing is ready-made standard component, and it is used for the optical precision adjustment, and the cost of member is reduced greatly.

This novel structure contains radial bearing 1 as shown in Figure 1; External fixation ring 2; Internal fixation ring 3; Roof pressure screw mandrel 4 and optical element 5.External fixation ring 2 is connected with optical adjusting mechanism, and internal fixation ring 3 places within the external fixation ring 2, and internal fixation ring 3 is stepped appearance usually, and radial bearing 1 is to place between inside and outside two

set collars

3,2, and fastens radial bearing 1 with inside and outside two set collars 3,2.On the disk on rank, 3 end of internal fixation ring, there is the equally distributed roof pressure screw mandrel 4 that supplies to twist the screws of inserting 9, is typically provided with 3 screws 9 as shown in Figure 2.Controlled optical element 5 places within the annulus of internal fixation ring 3.Roof pressure screw mandrel 4 passes on 3 end of the internal fixation ring rank disk screw 9 roof pressures on radial bearing 1.By the adjusting of roof pressure screw mandrel 4, make the interior ring of radial bearing make sphere and entad move, thereby reach the orientation of regulating optics.In the adjustment in optical precision orientation, common mechanism has the adjustment of bikini orientation adjustment, quadrature rotary shaft orientation adjustment and three-dimensional position.The bikini orientation adjustment can realize with a plain radial bearing, see accompanying drawing 1; Positive rotary shaft orientation adjustment can realize that with two nested storings of inside and outside plain radial bearing and attached with bearing pin two orthogonal dimensions rotate, and see accompanying drawing 3 between the two.Oscillating bearing 6 entad outside the radial bearing of being seen in accompanying drawing 3 contains, interior plain radial bearing 7 has bearing pin 8 between the two.Interior plain radial bearing realizes that vertical axle rotates, and entad oscillating bearing is realized horizontally rotating outward.Rotation direction as shown in Figure 5.Plain radial bearing is taken as standard component, and interior external diameter differs very little, so the adjustment member profile of design is very compact, is widely used in the cavity adjustment of microminiature Laser Devices and single-frequency laser device, and the orientation adjustment member of high dynamic stability.

The adjustment of said three-dimensional position is that the radial bearing that fastens between inside and outside two

set collars

3,2 is that row or two are listed as entad globe bearing 10, as shown in Figure 4.

Description of drawings:

Fig. 1 adjusts the synoptic diagram of member for the precision optics that has a plain radial bearing of embodiment 1 of the present utility model.

Fig. 2 is the right view of internal fixation ring 3 among Fig. 1.

Fig. 3 contains the synoptic diagram of the precision optics adjustment member of two plain radial bearing quadrature rotary types for embodiment 2.

Fig. 4 is embodiment 3, and radial bearing adopts the entad synoptic diagram of the precision optics adjustment member of globe bearing 10.

Fig. 5 is Fig. 3 embodiment 2, adopts vertical (Y-axis) and the synoptic diagram that horizontal direction (X-axis) is rotated of the precision levelling member of 2 plain radial bearings.

The invention has the advantages that:

(1) radial bearing is in course of adjustment, and the centre of sphere is fixed point, and the principal point of optical element is placed on the centre of sphere fixed point, does not bring additional optical distance in the adjustment process into; (2) because radial bearing is end secondary motion, in case orientation adjustment is complete, static state and the dynamic stability of structural entity are high; What (3) adopt because of radial bearing is standard component, so the cost of member is extremely low. Volume is little, and practical value is very high.

Embodiment:

Embodiment 1, adopts the precision optics of this novel radial bearing to adjust member, is used for the resonator cavity adjusting mechanism of microminiature Laser Devices, and its structure diagram such as accompanying drawing 1, radial bearing 1 are elected 1 on GB304.5-81 type as.Splendid because of the dynamic property of plain radial bearing, so the output of the power of laser instrument can keep stable for a long time, this is the focus that the Laser Devices deviser makes joint efforts.

Embodiment 2, and plain radial bearing adopts two on ES type, and its structure as shown in Figure 3.Be used for the adjustment of laser resonant cavity, it is reliable and stable to adjust the result, and the laser power output stability is good.

Embodiment 3, place radial bearing between inside and outside two

set collars

3,2 to adopt single-row or biserial globe bearing 10 entad, as shown in Figure 4.The entad globe bearing 10 of standard component is GB276-82 or GB281-84, be used for the KTP frequency multiplier, KTP frequency-doubling crystal as optical element 5 places in the annulus of internal fixation ring 3, adjustment by roof pressure screw mandrel 4 reaches orientation adjustment, makes internal fixation ring 3 be with the KTP frequency-doubling crystal to rotate together, make it reach precision adjustment with optical axis or polarization orientation, the member of its composition is small and exquisite, adjusts reliable and stablely, and very high practical value is arranged.

Claims

1, a kind of precision optics that has radial bearing is adjusted member, it is characterized in that containing the external fixation ring (2) that is connected with adjusting mechanism, have within the set collar (2) outside and be step-like internal fixation ring (3), fasten radial bearing (1) between external fixation ring (2) and the internal fixation ring (3), the equally distributed screw of inserting (9) of twisting for roof pressure screw mandrel (4) is arranged on the disk of the rank, the end of step-like internal fixation ring (3), roof pressure screw mandrel (4) passes screw (9) roof pressure on radial bearing (1), and controlled optical element (5) places within the annulus of internal fixation ring (3).

2, adjust member according to the described a kind of precision optics that has a radial bearing of claim 1, it is characterized in that said radial bearing (1) is a plain radial bearing, or globe bearing entad.

3, adjust member according to claim 1 or 2 described a kind of precision optics that have radial bearing, it is characterized in that plain radial bearing is 1 or two, entad globe bearing is single-row or biserial.

4, adjust members according to claim 1 or 2 described a kind of precision optics that have a radial bearing, it is characterized in that placing that inside and outside two plain radial bearings (7), (6) are that nested storing also has bearing pin (8) between the two between external fixation ring (2) and the internal fixation ring (3).