CN108279495B - A kind of rotary shaft optical adjusting frame design method - Google Patents

Abstract

The invention discloses a design method of a rotating shaft type optical adjustment frame. The rotation axis of the optical lens fixed by the adjustment frame forms a certain angle with the normal line of the optical mirror surface. When the fixed lens unit rotates, the normal line of the mirror surface also rotates. The structure realizes double-layer rotation, which can adjust the mirror normal to any position of a certain spatial solid angle, and realizes an effective two-dimensional light adjustment method.

Description

Design method of a rotating shaft optical adjustment mount

technical field

The invention relates to the principle design of the optical adjustment frame. The rotation axis of the optical lens fixed by the adjustment frame forms a certain angle with the normal line of the optical mirror surface. , the mirror normal can be adjusted to any position of a certain spatial solid angle, and an effective two-dimensional light adjustment method can be realized.

Background technique

The adjustment of the plane mirror is very important in the optical path. At present, two-dimensional adjustments (angle pitch and yaw directions) of optical components are generally carried out in two ways: non-coplanar adjustment and coplanar adjustment. Although the two adjustment methods can better adjust the angle, pitch and yaw direction, but because the adjustment knobs of some existing optical adjustment mounts are on the side, when it is required to build a relatively compact optical path, it will make subsequent optical path adjustments difficult. bring some difficulties. At the same time, for the non-coplanar optical adjustment mount, there is also the problem that the center position of the optical element (mirror surface) changes when the optical adjustment mount is adjusted. Moreover, most of today's optical adjustment mounts are composed of a movable plate (connecting the optical elements), a fixed plate, a steel ball (for supporting), a screw (for adjusting the movable plate relative to the fixed plate), and a spring (for stretching) The optical adjustment mount with this structure has poor shock resistance and is limited to fine-tuning of angles.

Contents of the invention

The purpose of the present invention is to solve the limitations of the above-mentioned prior art, and propose a design of a rotating shaft optical adjustment mount. The double-layer rotation is realized through the sleeve-type structure, and the mirror normal can be adjusted to any position of a certain spatial solid angle, realizing an effective two-dimensional light adjustment method, and the adjustment is convenient.

The technical solution of the present invention is as follows: a rotating shaft type optical adjustment mount design, the design includes the following steps:

①Assuming that the diameter of the first rotating cylinder is d ₁ and the length is L ₁ , the diameter of the second rotating cylinder is d ₂ and the length is L ₂ , the included angle between the rotating axis of the first rotating cylinder and the rotating axis of the second rotating cylinder is θ, and θ>0, d ₁ >d ₂ , L ₁ <L ₂ ;

② Design the center position of the reflector surface to coincide with the intersection of the rotating shaft of the first rotating cylinder and the rotating shaft of the second rotating cylinder;

③ Put the second rotating cylinder into the first rotating cylinder, and fix the first rotating cylinder in the concave groove of the second rotating cylinder through the threaded hole of the first rotating cylinder through screws to prevent translation between the two rotating cylinders;

④Put the reflecting mirror into the second rotating cylinder and install it at the intersection of the rotating shaft of the first rotating cylinder and the rotating shaft of the second rotating cylinder, so as to ensure that the center position of the mirror surface of the reflecting mirror (1) and the rotating shaft of the first rotating cylinder (3) are in line with the The intersection position of the rotating shaft of the second rotating cylinder coincides, and the reflector is locked by the cylinder, and the angle between the normal direction of the reflecting mirror and the rotating axis of the second rotating cylinder (4) is α;

⑤Assemble the assembled first rotating cylinder, second rotating cylinder and reflector into the support frame, and fix the first rotating cylinder in the concave groove of the first rotating cylinder through the threaded holes of the supporting frame through screws to prevent the first rotating cylinder from (3) The translation between the support frame and the support frame;

⑥Fix the support frame to the experimental optical platform with screws through the threaded holes;

⑦Repeatedly adjust the second rotating cylinder and the first rotating cylinder until the outgoing light of the reflector meets the outgoing angle required by the actual optical path, that is, reaches the center position of the rear optical element;

⑧Use screws to lock the second rotating cylinder through the threaded holes of the first rotating cylinder, and use screws to lock the first rotating cylinder through the threaded holes of the support frame.

Technical effect of the present invention is as follows:

1. Due to the use of a rotating shaft optical adjustment frame design, the present invention can effectively eliminate the movement of the center position of the plane mirror and eliminate adjustment errors.

2. The present invention can realize the two-dimensional adjustment of the pitch and yaw of the light due to the design of a rotating shaft optical adjustment frame.

3. Due to the use of a rotating shaft optical adjustment frame design in the present invention, because it is adjusted by rotation instead of the general side knob adjustment, it can realize more convenient adjustment in a relatively compact optical path.

4. The invention adopts the design of a rotating shaft optical adjustment frame, and because it is adjusted by rotating the double-layer sleeve, the anti-seismic ability is improved.

Description of drawings

Fig. 1 is a schematic diagram of a sectional view of the angle between the normal line of the fixed surface of the rotating part and the rotating shaft.

Fig. 2 is a schematic diagram of a section of a wedge lens method.

Figure 3 is a schematic diagram of the angle between the normal of the two rotating cylinders and the plane mirror. In order to express clearly and intuitively, the image is exaggerated. In fact, the angle between the two rotating shafts and the normal of the plane mirror and the two axes is very small. (1° to 2°).

Fig. 4 is a schematic structural view of the optical adjustment mount based on the method, wherein (a) (b) is a perspective view of the optical adjustment mount; (c) (d) is a side view of the optical adjustment mount; (e) is a front view of the optical adjustment mount picture.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

We explain the design of the rotating shaft optical adjustment mount theoretically and with examples.

We illustrate the pitch and yaw of the plane mirror normal based on this design.

As shown in Figure 3, if the second rotating cylinder 4 is rotated earlier, it turns around its own rotation axis through an angle Since the second rotating cylinder 4 is contained in the first rotating cylinder 3, only the second rotating cylinder 4 and the reflector 1 rotate, and the first rotating cylinder 3 does not move; then the second rotating cylinder 4 is not adjusted, and the first rotating cylinder is adjusted cylinder 3, so that it rotates through an angle around its own axis of rotation At this moment, all the devices in the first rotating cylinder 3 rotate with it, including the second rotating cylinder 4 and the reflecting mirror 1 . After the above adjustments, the normal coordinates of mirror 1 change from the initial (α, 0) to (β, γ), where:

The size of the two rotating cylinders and the relative angle between the axes of the two rotating cylinders can be processed according to the size of the selected optical element and the adjustment range of pitch and yaw to be realized.

The specific steps of the light adjustment method for implementing non-coaxial and eliminating center movement of optical elements in the present invention are as follows:

①Assume that the diameter of the first rotating drum 3 is d ₁ and the length is L ₁ , the diameter of the second rotating drum 4 is d ₂ and the length is L ₂ , the distance between the rotating shaft of the first rotating drum 3 and the rotating shaft of the second rotating drum 4 The included angle is θ, and θ>0, d ₁ >d ₂ , L ₁ <L ₂ ;

2. The central position of the mirror surface of the design reflector 1 coincides with the intersection of the rotating shaft of the first rotating cylinder 3 and the rotating shaft of the second rotating cylinder 4;

③ Put the second rotating cylinder 4 into the first rotating cylinder 3, and fix the first rotating cylinder 3 in the concave groove 13 of the second rotating cylinder through the threaded hole 9 of the first rotating cylinder through screws, so as to prevent the flatness between the two rotating cylinders. verb: move;

④ Put the reflector 1 into the second rotating cylinder 4 and install it at the intersection of the rotating shaft of the first rotating cylinder 3 and the rotating shaft of the second rotating cylinder 4 to ensure that the center position of the mirror surface of the reflecting mirror 1 and the rotating shaft of the first rotating cylinder 3 are in line with the The intersection positions of the rotating shafts of the second rotating cylinder 4 coincide, and the reflector 1 is locked by the cylinder 11. The angle between the normal direction 2 of the reflecting mirror 1 and the rotating shaft of the second rotating cylinder 4 is α;

⑤ Assemble the assembled first rotating cylinder 3, second rotating cylinder 4 and reflector 1 into the support frame 5, and fix the first rotating cylinder 3 in the concave groove 12 of the first rotating cylinder through the screw holes 7 of the support frame Inside, prevent translation between the first rotating cylinder 3 and the support frame 5;

⑥ Fix the support frame 5 to the experimental optical platform through the threaded hole 6 with screws;

⑦Repeatedly adjust the second rotating cylinder 4 and the first rotating cylinder 3 until the outgoing light of the reflector 1 meets the outgoing angle required by the actual optical path, that is, reaches the center position of the rear optical element;

⑧ Lock the second rotating cylinder 4 through the threaded hole 10 of the first rotating cylinder with a screw, and lock the first rotating cylinder 3 through the threaded hole 7 of the support frame with a screw.

Claims (1)

1. a kind of rotary shaft optical adjusting frame design method, which is characterized in that method includes the following steps:

1. setting the diameter of the first rotary cylinder (3) as d₁, length L₁, the diameter of the second rotary cylinder (4) is d₂Length is L₂, first turn Angle between the shaft of dynamic cylinder (3) and the shaft of the second rotary cylinder (4) is θ, and θ > 0, d₁> d₂, L₁<L₂；

2. designing the friendship of the shaft of the shaft and the second rotary cylinder (4) of reflecting mirror (1) mirror surface center and the first rotary cylinder (3) Point position is overlapped；

3. the second rotary cylinder (4) are packed into the first rotary cylinder (3), by screw through the first rotary cylinder threaded hole (9) by first turn Dynamic cylinder (3) are fixed in the second rotary cylinder concave groove (13), prevent the translation between two rotary cylinders；

4. reflecting mirror (1) is packed into the second rotary cylinder (4) and is mounted on shaft and the second rotary cylinder (4) of the first rotary cylinder (3) Shaft intersection position, it is ensured that the shaft of reflecting mirror (1) mirror surface center and the first rotary cylinder (3) and the second rotary cylinder (4) intersection position of shaft is overlapped, and is lockked reflecting mirror (1) by cylinder (11), the normal direction (2) of the reflecting mirror (1) with Angle between the shaft of second rotary cylinder (4) is α；

5. assembled first rotary cylinder (3), the second rotary cylinder (4) and reflecting mirror (1) are assembled in support frame (5), pass through First rotary cylinder (3) is fixed in the first rotary cylinder concave groove (12) by screw through support frame threaded hole (7), prevents the first rotation Translation between cylinder (3) and support frame (5)；

6. the support frame (5) is fixed on Experimental Optical platform by threaded hole (6) with screw；

7. the second rotary cylinder (4) and the first rotary cylinder (3) are adjusted repeatedly, until the emergent ray of reflecting mirror (1) meets practical light Shooting angle needed for road reaches the center of optical element below；

8. the second rotary cylinder (4) are locked with screw by the first rotary cylinder threaded hole (10), pass through support frame screw thread with screw Hole (7) locks the first rotary cylinder (3).