CN104808305A - Optical element center positioning and adjusting mechanism using double-eccentric-circle principle - Google Patents

Abstract

The optical element center positioning adjustment mechanism using the principle of double eccentric circles is characterized in that its structure is as follows: the center of the basic disc is set on the optical theoretical axis, and a secondary disc is arranged on the inner element of the basic disc. The eccentric distance between the inner circle of the disc and the outer circle of the basic disc is L3; The eccentric distance between the circles is L2; a clamping point is arranged on the inner element of the clamping disc, and the eccentric distance between the clamping point and the center of the clamping disc is L1. The invention can precisely place the position of the optical fiber head on the focal point of the system, omits guide rails and adjustment screws, and only uses concentric circle rotation to achieve the adjustment purpose. Can save space and reduce cost at the same time. The locking mechanism of the optimized scheme omits the guide rail and adjusting screw in the conventional adjustment mechanism, and only uses concentric circle rotation to achieve the adjustment purpose. In certain occasions, it can save space and reduce costs at the same time.

Description

Optical element center positioning adjustment mechanism based on the principle of double eccentric circles

technical field

The present invention relates to an optical system adjustment mechanism, in particular to an optical element center positioning adjustment mechanism utilizing the principle of double eccentric circles.

Background technique

In the process of optical system adjustment, it is often necessary to adjust a certain component to the optical axis. That is, the center of the component coincides with the center of the system. In general, each element is installed on the optical adjustment mount, and the position and attitude of the element are adjusted through individual adjustment screws and guide rails as required; that is, the displacement in three different directions and the rotation angle around the three coordinate axes in space. In some special cases, if the space position cannot accommodate the placement of the adjustment frame, it is necessary to use some special adjustment methods to adjust the position of the components. For example, the optical fiber technology that is gradually being widely used at present often requires a mechanism to precisely place the position of the optical fiber head on the focal point of the system; and in some specific occasions, the existing technology has not yet had a technical solution that can satisfactorily complete the above tasks.

Contents of the invention

    In order to make up for the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a center positioning adjustment mechanism for optical elements utilizing the principle of double eccentric circles, which can complete the task of placing the position of the optical fiber head on the focal point of the system precisely, and The guide rail and adjustment screw in the conventional adjustment mechanism are omitted, and only the concentric circle rotation is used to achieve the adjustment purpose. In certain occasions, it can save space and reduce costs at the same time.

The technical solution for accomplishing the task of the above invention is a center positioning adjustment mechanism for optical elements utilizing the principle of double eccentric circles, which is characterized in that the structure of the positioning adjustment mechanism is as follows:

The center of the basic disc (also called part 3) is set on the optical theoretical axis, and a secondary disc (also called part 2) is arranged on the inner element of the basic disc. The eccentric distance between the outer circles of the discs is L3;

The outer circle of the clamping disc (also referred to as part 1) is set on the inner element of the secondary disc, and the eccentricity between the inner circle of the second disc and the outer circle of the second disc is L2;

A clamping point is arranged on the inner element of the clamping disc, and the eccentric distance between the clamping point and the center of the clamping disc is L1.

In order to reduce the size of the mechanism as much as possible, the components used in the mechanism are simplified as much as possible. A simple circular radial and axial positioning method is used between components, which is effective and accurate in positioning. That is, the clamping disc (part 1) is installed through the outer circle with matching requirements and the end face with perpendicularity requirements to the outer circle and the corresponding inner circle and end face of the secondary disc (part 2). Radial locking screw for locking. Similarly, the secondary disk (part 2) and the basic disk (part 3) use the same installation and locking method.

At the clamping point, the optical fiber is clamped by opening a hole corresponding to the size of the optical fiber head on the clamping disc, and pressing the optical fiber head with a stop nail after the optical fiber head penetrates the hole. Another method is to use a clamp to hold the fiber tip.

The said L1, L2, L3 can be set according to the required adjustment amount. The basic principle is that the two dotted circles drawn by the eccentricity in Figure 1 have intersection points, which can ensure the accuracy of adjustment.

In other words, the present invention is a structural device for precisely placing the position of the optical fiber head on the focal point of the optical system during the adjustment of the optical system. The working principle of the mechanism is shown in attached drawing 1; the mechanism is composed of three main parts, the optical fiber head to be adjusted is clamped on the clamping disc 1 (part 1), the clamping point 4 is connected with the clamping disc 1 (part 1) The center of the circle has an eccentric distance L1. The outer circle of the clamping disc 1 is installed in the inner circle of the secondary disc 2 (part 2), and the inner element and the outer circle of the second disc 2 also have an eccentric distance L2. The secondary disc 2 is installed in the inner circle of the basic disc 3 (component 3 ), and likewise, the inner circle has an eccentric distance L3 from the outer circle. The center O of the outer circle of the basic disk 3 is on the theoretical optical axis. By rotating the clamping disk 1, it can be seen that the movement track of the optical fiber head to be adjusted is a dotted circle X1, and the distance between the center of the outer circle of the secondary disk 2 and the theoretical center O is used as the radius to draw a dotted circle X2. X1 intersects X2 with point P. Point P must be able to rotate to the theoretical center O when the secondary disk 2 rotates in the inner hole of the basic disk 3 . That is, the fiber head can be adjusted to an accurate position.

In the optimized solution, the present invention is provided with a locking device, and the applicant recommends that the locking device can adopt the following structure:

Make screw holes and light holes on the clamping disc and the secondary disc (parts 1, 2) respectively, and insert steel ball 7 or circular steel column through the radial direction of the screw hole 5 on the clamping disc, and use When the axial screw is turned down, the steel ball is squeezed to the outer circle to press the inner circle of another component, thus completing the radial locking function of the forming mechanism. The axial effective locking function of the mechanism can be formed by using the second screw hole 8 and the thumb screw 9 (see FIG. 3 ) on the secondary disc. The thumb screw 9 is larger than the end face 10 of the ordinary screw, and the end face and the screw axis have a perpendicularity requirement and a stricter finish requirement. In the same way, the mutual locking function of the two stages can be accomplished through the screw hole 2 8 on the basic disk 3 and the screw hole 1 5 on the secondary disk 2 . Therefore, this mechanism is a complete center positioning adjustment mechanism.

The light hole 6 on the clamping disc and the secondary disc (parts 1, 2) can be inserted into the round rod auxiliary part to rotate during adjustment.

The present invention can accomplish the task of placing the position of the optical fiber head precisely on the focal point of the system, and omits the guide rail and adjusting screw in the conventional adjusting mechanism, and only uses concentric circle rotation to achieve the adjustment purpose. In certain occasions, it can save space and reduce costs at the same time. The locking mechanism of the optimized scheme omits the guide rail and adjusting screw in the conventional adjustment mechanism, and only uses concentric circle rotation to achieve the adjustment purpose. In certain occasions, it can save space and reduce costs at the same time.

Description of drawings

Fig. 1 is principle of the present invention and structural representation;

The series of figures is a schematic diagram of the structure of the locking device in the present invention; among them, Fig. 2a and Fig. 2b are views in two directions of the clamping disc; Fig. 2c and Fig. 2d are views in two directions of the secondary disc; Fig. 2e is the basis disc;

Fig. 3 is a structural schematic diagram of an improved thumb screw.

Detailed ways

Embodiment 1, the optical element center positioning adjustment mechanism using the principle of double eccentric circles, referring to Figure 1 and Figure 2: the mechanism is composed of three main parts, the optical fiber head to be adjusted is clamped on the clamping disc 1, and the clamping point 4 and the center of the clamping disc 1 have an eccentric distance L1. The outer circle of the clamping disc 1 is installed in the inner circle of the secondary disc 2, and the inner element and the outer circle of the second disc 2 also have an eccentric distance L2. The secondary disc 2 is installed in the inner circle of the basic disc 3, similarly, the inner circle has an eccentric distance L3 from the outer circle. The center of the outer circle of the basic disk 3 is on the theoretical optical axis O. By rotating the clamping disk 1, it can be seen that the movement track of the optical fiber head to be adjusted is a dotted circle X1, and the distance between the center of the outer circle of the secondary disk 2 and the theoretical center O is used as the radius to draw a dotted circle X2. X1 intersects X2 with point P. Point P must be able to rotate to the theoretical center when the secondary disk 2 rotates in the inner hole of the basic disk 3 . That is, the fiber head can be adjusted to an accurate position. Make screw holes and light holes 6 on the clamping disc 1 and the secondary disc 2 respectively, and insert steel balls 7 or circular steel columns in the radial direction of the screw hole 5 on the clamping disc, and use axial screws to When spinning down, the steel ball is extruded to the outer circle to press the inner circle of another component, thus completing the radial locking function of the forming mechanism. The axial effective locking function of the mechanism can be formed by using the second screw hole 8 and the thumb screw 9 (see FIG. 3 ) on the secondary disc 2 . The present invention recommends the use of an improved screw 9 , which is larger than the end face 10 of a common screw, and the requirements on the perpendicularity and smoothness between the end face 10 and the screw axis are more stringent. Similarly, the mutual locking function of the two stages can be accomplished through the screw hole 2 8 on the basic disc and the screw hole 1 5 on the secondary disc. Therefore, this mechanism is a complete center positioning adjustment mechanism. The optical hole 6 on the clamping disc 1 and the secondary disc 2 can be inserted into the round rod auxiliary part to rotate during adjustment.

Claims (6)

1. utilize a center of optical element location adjusting mechanism for two off-centre operation principle, it is characterized in that, the structure of this location adjusting mechanism is as follows:

The center of circle of basis disk is arranged on optical theory axis, and in this basic disk, unit is provided with secondary disk, the eccentric throw between this basic disk inner circle and basic disk cylindrical is L3;

The cylindrical of clamp circle disk is arranged in the interior unit of described secondary disk, and the eccentric throw between this secondary disk inner circle and secondary disk cylindrical is L2;

In described clamp circle disk, unit is provided with bite, the eccentric throw between this bite and the clamp circle disk center of circle is L1.

2. the center of optical element location adjusting mechanism of the two off-centre operation principle of utilization according to claim 1, it is characterized in that, the concrete set-up mode of described bite is: by opening the hole of size corresponding to optical fiber head on clamp circle disk, after optical fiber head penetrates this hole, use only head screw in compression optical fiber head, or use clip to block optical fiber head.

3. the center of optical element location adjusting mechanism of the two off-centre operation principle of utilization according to claim 1, it is characterized in that, the determination principle of described proportionate relationship between L1, L2, L3 is: two broken circles drawn by degree of eccentricity have intersection point, to ensure the accuracy adjusted.

4. according to the center of optical element location adjusting mechanism of the two off-centre operation principle of the utilization one of claim 1-3 Suo Shu, it is characterized in that, also be provided with locking device, this locking device adopts following structure: on clamp circle disk, secondary disk and basic disk, stamp screw hole and unthreaded hole respectively, steel ball or circular steel column is loaded by the radial direction of the screw on clamp circle disk, when utilizing axial bolt backspin, steel ball is pressed against the inner circle that cylindrical oppresses another parts, completes the radial locking function of mechanism; Utilize the axial locking function of screw on secondary disk and major part screw shaped cost mechanism.

5. the center of optical element location adjusting mechanism of the two off-centre operation principle of utilization according to claim 4, it is characterized in that, installation and the locking method of described clamp circle disk and described secondary disk are: use diameter to, axial location method between parts: clamp circle disk is installed by the corresponding inner circle of the end face that has the cylindrical that coordinates and require and have verticality to require with cylindrical and secondary disk and end face, is locked after completing adjustment by end face and radial lock-screw.

6. the center of optical element location adjusting mechanism of the two off-centre operation principle of utilization according to claim 4, it is characterized in that, installation and the locking method of described secondary disk and described basic disk are: secondary disk is installed by the corresponding inner circle of the end face that has the cylindrical that coordinates and require and have verticality to require with cylindrical and basic disk and end face, is locked after completing adjustment by end face and radial lock-screw.