Light beam adjusting mechanism

Abstract

The utility model discloses a light beam adjusting mechanism, which comprises a first parallel flat plate and a second parallel flat plate, the light beam adjusting mechanism further comprises a first rotating disc and a second rotating disc, the rotating axes of the first rotating disc and the second rotating disc are axes, the first parallel flat plate and the second parallel flat plate are obliquely arranged relative to the axes, the first parallel flat plate is in linkage with the first rotating disc, and the second parallel flat plate is in linkage with the second rotating disc.

Description

Technical Field

[0001] This utility model relates to the field of optical technology, and in particular to a beam adjustment mechanism. Background Technology

[0002] In optics, a common method for beam displacement compensation involves using a parallel plate. By changing the angle of the parallel plate, displacement in different directions can be adjusted. Typically, a caster wheel is installed under the parallel plate, allowing it to be tilted in different directions, thus enabling the beam passing through the plate to be translated in any direction. However, since the tilting in different directions is primarily controlled manually, and the tilt angle is small, typically no more than 10°, the adjustment accuracy is relatively low.

[0003] In addition, there is also an electrically controlled method, such as the continuously adjustable optical attenuator disclosed in Chinese Patent Application No. 201020668593.6, which includes a light source capable of emitting a light beam, and a first plate optical element and a second plate optical element provided in the direction of the beam's advance. The first plate optical element and the second plate optical element are respectively placed on a first rotating platform and a second rotating platform; the first rotating platform and the second rotating platform are set on an operating platform, and the first rotating platform and the second rotating platform are interconnected by gear meshing, with equal rotation angles and opposite rotation directions between them; another example is the femtosecond laser beam trajectory scanning device for micro-hole processing disclosed in Chinese Patent Application No. 202221531738.7. When a beam with a certain angle is incident on parallel plates, the relative rotation angle of the two parallel plates is controlled by a drive motor. By controlling the synchronous movement of the deflection wedge group and the parallel plate group, the laser beam achieves synchronous dynamic translation during processing, and changing the deflection angle can change the lateral displacement of the beam, thereby achieving precise and controllable taper of the processed hole.

[0004] The above-mentioned adjustment method also has low adjustment accuracy. In addition, the rotation axis of the parallel plate is perpendicular to the incident light path. When it is rotated to be perpendicular to the incident light, reflection will occur, and the return loss will also be uncontrollable. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a beam adjustment mechanism with simple structure and high adjustment accuracy.

[0006] The first technical solution adopted by this utility model to solve the above-mentioned technical problem is: a beam adjustment mechanism, comprising a first parallel plate and a second parallel plate for the beam to pass through; characterized in that:

[0007] The beam adjustment mechanism further includes a first turntable and a second turntable. The rotation axes of the first turntable and the second turntable are both axes. The first parallel plate and the second parallel plate are both inclined relative to the axes. The first parallel plate is linked with the first turntable, and the second parallel plate is linked with the second turntable.

[0008] The relative rotation of two parallel plates is achieved by using a turntable, which is simple in structure and operation. The turntable structure also allows for precise angle adjustment, enabling precise control over the displacement of the light beam.

[0009] Furthermore, the axis coincides with or is parallel to the incident direction of the light beam, so that the incident angle of the light beam does not change during the rotation of the parallel plate, and no return loss occurs.

[0010] Furthermore, the first turntable can be indirectly fixed or de-fixed with the second turntable, so that the first turntable can rotate synchronously with the second turntable or rotate independently relative to the second turntable. Thus, when rotating synchronously, the displacement direction of the light beam can be adjusted.

[0011] Furthermore, to facilitate the setting of the two turntables and the parallel plate, the beam adjustment mechanism also includes a first turntable central axis and a first carrier. The first parallel plate is fixed on the first carrier. The first turntable and the first carrier are clamped together from both sides of the first turntable central axis and rotate synchronously. The first turntable can be fixed or unfixed to the first turntable central axis.

[0012] The beam adjustment mechanism also includes a second turntable central axis and a second carrier. The second parallel plate is fixed on the second carrier, and the second turntable and the second carrier are clamped together from both sides of the second turntable central axis and rotate synchronously.

[0013] Furthermore, the method of fixing the turntable and the corresponding carrier is that the second turntable is fixed to the second carrier by a first screw passing axially through the central axis of the second turntable;

[0014] The first turntable and the first carrier are locked by a threaded connection, or the first turntable is fixed to the first carrier by a second screw passing axially through the central axis of the first turntable.

[0015] Furthermore, after adjustment, the fixing method between the central axis of the turntable and the corresponding turntable (carrier) is as follows: the beam adjustment mechanism also includes a first side set screw and a second side set screw. The first side set screw passes through the central axis of the first turntable and is radially pressed against the peripheral wall of the first turntable or the first carrier. The second side set screw passes through the central axis of the second turntable and is radially pressed against the peripheral wall of the second turntable or the second carrier.

[0016] Furthermore, the synchronous rotation of the two turntables can be achieved by the beam adjustment mechanism further comprising a ring-shaped double turntable carrier, wherein the first carrier is at least partially located within the double turntable carrier, and the double turntable carrier is fixed to the first carrier by a third screw, wherein the central axis of the second turntable and the second carrier are each at least partially located within the double turntable carrier, and the double turntable carrier is fixed to the central axis of the second turntable by a fourth screw, and the double turntable carrier can also be fixed to the second carrier by a fifth screw.

[0017] The second technical solution adopted by this utility model to solve the above-mentioned technical problem is: a beam adjustment mechanism, including a first wedge plate and a second wedge plate for the beam to pass through; characterized in that:

[0018] The beam adjustment mechanism further includes a first turntable and a second turntable, both of which have the same rotation axis X. The first wedge plate is linked to the first turntable, and the second wedge plate is linked to the second turntable.

[0019] The two wedge plates are rotated relative to each other by a turntable, which is simple in structure and operation. The turntable structure also allows for precise adjustment of the angle, enabling precise control of the beam deflection angle.

[0020] Furthermore, the first turntable can be directly or indirectly fixed or defixed to its central axis, allowing it to rotate synchronously with or independently of the second turntable. Thus, when rotating synchronously, the deflection direction of the light beam can be adjusted.

[0021] Furthermore, to facilitate the setting of the two turntables and the wedge, the beam adjustment mechanism also includes a first turntable central axis and a first carrier. The first wedge is fixed on the first carrier. The first turntable and the first carrier are clamped together from both sides of the first turntable central axis and rotate synchronously. The first turntable can be fixed or unfixed to the first turntable central axis.

[0022] The beam adjustment mechanism also includes a second turntable central axis and a second carrier. The second wedge plate is fixed on the second carrier, and the second turntable and the second carrier are clamped together from both sides of the second turntable central axis and rotate synchronously.

[0023] Preferably, the two right-angled sides of each wedge are perpendicular to and parallel to the axis, respectively.

[0024] Compared with the prior art, the advantages of this utility model are: the relative and synchronous rotation of two parallel plates (wedge plates) is achieved by a turntable, which makes the structure simple and the operation simple. Moreover, the turntable structure can achieve precise angle adjustment, so as to make precise adjustment of the displacement (deflection angle) of the beam. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the beam adjustment mechanism according to the first embodiment of the present invention;

[0026] Figure 2 This is a cross-sectional view of the beam adjustment mechanism of the first embodiment of this utility model;

[0027] Figure 3 This is an exploded structural diagram of the beam adjustment mechanism according to the first embodiment of the present invention;

[0028] Figure 4 This is a cross-sectional view (relative to) the beam adjustment mechanism of the first embodiment of the present invention. Figure 2 (The first parallel plate rotates 180°);

[0029] Figure 5 This is an exploded structural diagram of the beam adjustment mechanism according to the second embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the beam adjustment mechanism according to the third embodiment of the present invention;

[0031] Figure 7 This is a cross-sectional view of the beam adjustment mechanism according to the third embodiment of this utility model;

[0032] Figure 8 This is an exploded structural diagram of the beam adjustment mechanism according to the third embodiment of the present utility model;

[0033] Figure 9 This is a cross-sectional view of the beam adjustment mechanism according to the fourth embodiment of the present invention;

[0034] Figure 10 This is a cross-sectional view (relative to) the beam adjustment mechanism of the fourth embodiment of the present invention. Figure 9 (The first wedge plate rotates 180°);

[0035] Figure 11 This is an exploded structural diagram of the beam adjustment mechanism according to the fourth embodiment of the present invention;

[0036] Figure 12-1 A schematic diagram of two parallel plates rotating synchronously;

[0037] Figure 12-2 This is a schematic diagram of two parallel plates rotating relative to each other.

[0038] Figure 13 A schematic diagram of the beam after correction using two parallel plates;

[0039] Figure 14-1 This is a schematic diagram showing the two wedge plates with their high and low points pointing in the same direction.

[0040] Figure 14-2 This is a schematic diagram showing the alignment of the high and low points of the two wedge plates. Detailed Implementation

[0041] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions.

[0042] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this utility model can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0043] See Figure 12-1 In optical systems, it is often necessary for two optical elements to rotate both relative to each other and synchronously. For example, two parallel plates 100 tilted at the same angle can be used to adjust the displacement of the optical path. When the two parallel plates 100 are parallel, the displacement of the light beam through the assembly of the two parallel plates 100 is the greatest. When the two parallel plates 100 rotate relative to each other, the adjustment of displacement gradually decreases. When they are arranged in a figure-eight pattern, see [reference needed]. Figure 12-2 The displacement of the beam passing through this component is 0. Therefore, by relative rotation, the displacement of the beam can be adjusted arbitrarily between the maximum displacement and 0.

[0044] Both parallel plates 100 can be rotated simultaneously. The displacement of the light beam through the two parallel plate 100 components is constant, but it rotates 360 degrees up, down, left, and right. See also Figure 13 A1 represents the original beam position, A2 represents the position after relative rotation and displacement, and circle B represents the curve corrected after the parallel plate rotates synchronously.

[0045] See Figure 14-1 Similarly, if two wedge plates 200 are used to correct the direction of the beam, the beam deflection angle is greatest when the high and low points of the two wedge plates 200 are in the same direction. See also Figure 14-2When the two wedge plates 200 are aligned at their highest and lowest points, the deflection angle of the beam is minimized, essentially zero. Therefore, the deflection angle can be adjusted arbitrarily between zero and the maximum angle by rotating the two wedge plates 200 relative to each other and rotating them together.

[0046] This invention utilizes the above-mentioned principle to form the following beam adjustment mechanism.

[0047] Example 1

[0048] See Figures 1-3 A beam adjustment mechanism includes a first turntable 11, a second turntable 12, a central axis 21 of the first turntable, a central axis 22 of the second turntable, a first parallel plate 41, a first carrier 31, the second turntable 12, the central axis 22 of the second turntable, the second parallel plate 42, and the second carrier 32. The central axes 21 and 22 of the first and second turntables are both annular, while the first turntable 11, the second turntable 12, the first carrier 31, and the second carrier 32 are all approximately disc-shaped. The first parallel plate 41 is fixed to the first carrier 31, and the second parallel plate 42 is fixed to the second carrier 32. The first turntable 11, the first carrier 31, the second turntable 12, and the second carrier 32 are arranged sequentially along axis X, and the rotation axes of the first turntable 11 and the second turntable 12 are both along axis X, with the optical path in the same direction as axis X. The first parallel plate 41 and the second parallel plate 42 are both inclined relative to axis X, and the inclination angle determines the maximum displacement compensation; optionally, the inclination angle is 85°. If both parallel plates are perpendicular to the axis X, then no matter how they are rotated, there will be no change between the two parallel plates. Figure 2 As shown, the two parallel plates are rotated to the same position (projected to coincide along the axis X). The incident direction of the light beam (incident on the first parallel plate 41 or the second parallel plate 42) coincides with or is parallel to the axis X. Here, parallelism allows for small angular errors due to manufacturing processes or assembly, such as within ±5°.

[0049] The first carrier 31 and the first turntable 11 partially pass through the central shaft 21 from opposite sides along its axial direction, and are fixed to each other. Part of the first turntable 11 protrudes axially from the central shaft 21 to allow for manual or electric operation, while the first carrier 31 can be completely inserted into the central shaft 21. Thus, rotating the first turntable 11 causes the first parallel plate 41 to rotate. Once rotated to its designated position, screws pass through the central shaft 21 and radially press against either the first turntable 11 or the first carrier 31, securing the three components and simultaneously fixing the first parallel plate 41. The outer circumferential surface of the central shaft 21 may be engraved with graduations corresponding to the corrected displacement.

[0050] Similarly, the second turntable 12 and the second carrier 32 partially pass through the central axis 22 of the second turntable from opposite sides along its axial direction, and are fixed together. The second turntable 12 protrudes axially from the central axis 22. Thus, rotating the second turntable 12 manually or electrically causes the second parallel plate 42 to rotate as well. Once rotated to its final position, screws passing through the central axis 22 secure the second plate 12 and the second carrier 32 radially against it, thus fixing the two components. The second parallel plate 42 is also fixed in place. The second turntable 12 is axially pressed against the central axis 21 of the first turntable.

[0051] The structure of the turntable and its central axis, as well as the relative rotation method, are existing technologies that allow for precise control of the rotation angle, and will not be elaborated upon here.

[0052] The X-axis always passes through the first parallel plate 41 and the second parallel plate 42, and the light beam also always passes through the first parallel plate 41 and the second parallel plate 42. When the first turntable 11 rotates, the displacement compensation of the light beam can be adjusted between 0 and the maximum displacement compensation, that is, the two parallel plates are in a figure-eight shape (…). Figure 4 ) and parallel( Figure 2 Adjust the positions of the first turntable central shaft 21, the first turntable 11, and the first carrier 31 as described above. After adjustment, fix the relative positions of the first turntable central shaft 21, the first turntable 11, and the first carrier 31 in the manner described above. Then, after the first turntable central shaft 21 and the second turntable 12 are fixed with screws, the two turntables can be rotated together by rotating the second turntable 12, and the direction of displacement compensation can be adjusted.

[0053] The parallel plate is driven by a turntable. When the parallel plate rotates within a certain angle range, such as 10° between parallel and figure-eight, this process is achieved by rotating the turntable 180°. This means that the angle of rotation of the parallel plate is magnified by the turntable, thus significantly improving the accuracy of the same adjustment range.

[0054] Example 2

[0055] See Figure 5 In this embodiment, the difference from the first embodiment is that the specific fixing method is as follows: the first turntable 11 and the first carrier 31 are locked by a threaded connection. The first side set screw 211 can pass through the central shaft 21 of the first turntable and abut against the peripheral wall of the first turntable 11 in the radial direction to fix the central shaft 21 of the first turntable 11 and the first turntable 11. When the first turntable 11 is rotated, the first parallel plate 41 will rotate together. The first side set screw 211 can also abut against the peripheral wall of the first carrier 31.

[0056] After the second turntable 12 is fixed axially through the second turntable central shaft 22 and the second carrier 32 by the first screw 121 (such as an M1.6 screw), the second turntable central shaft 22 is then radially tightened to the second turntable 12 or the second carrier 32 by the second side set screw 221. When the second turntable 12 is rotated, the second parallel plate 42 rotates together.

[0057] Example 3

[0058] See Figures 6-8 In this embodiment, the difference from Embodiment 2 is that the first turntable 11 is locked to the first carrier 31 by the second screw 111 (such as an M2 screw) passing axially through the central shaft 21 of the first turntable. This fixing method can also be used in Embodiment 2. Similarly, it can be fixed by the first side set screw 211 passing through the central shaft 21 of the first turntable and the peripheral wall of the first turntable 11. When the first turntable 11 is rotated, the first parallel plate 41 will rotate together.

[0059] The beam adjustment mechanism also includes a ring-shaped double-disc carrier 5. The first carrier 31 is at least partially located inside the double-disc carrier 5. The double-disc carrier 5 is fixed by a third screw 51 (such as an M2 screw) that passes radially through its own peripheral wall and the peripheral wall of the first carrier 31, so that the double-disc carrier 5 and the first parallel plate 41 rotate together.

[0060] The second turntable 12 is also locked in place by a first screw 121 (e.g., an M2 screw) axially passing through the central axis 22 of the second turntable and the second carrier 32. The positions of the second turntable 12 and the second carrier 32 are interchanged relative to Embodiment 2. The central axis 22 of the second turntable and the second carrier 32 are each at least partially located within the double turntable carrier 5. The double turntable carrier 5 is fixed to the central axis 22 of the second turntable by a fourth screw 52 (e.g., an M2 screw) radially passing through its peripheral wall. After the second turntable 12 has rotated to its position, a fifth screw 53 is used to radially pass through the peripheral walls of the double turntable carrier 51 and the second carrier 32 to fix them together, thereby securing the second turntable 12.

[0061] Example 4

[0062] See Figures 9-11 In this embodiment, the difference from embodiments one, two, and three above is that the first parallel plate 41 is replaced by a first wedge plate 61, and the second parallel plate 42 is replaced by a second oblique plate 62. The right-angled side of each wedge plate can be perpendicular to or parallel to the axis X, respectively.

[0063] See Figure 9 When the heights of the two wedge plates are in the same direction, the beam deflection angle is at its maximum. See also Figure 10 When the two wedge plates are aligned at their highest and lowest points, the deflection angle of the beam is minimized, essentially zero.

Claims

1. A beam adjustment mechanism, comprising a first parallel plate (41) and a second parallel plate (42) through which a beam passes; characterized in that: The beam adjustment mechanism also includes a first turntable (11) and a second turntable (12). The rotation axes of the first turntable (11) and the second turntable (12) are both axis (X). The first parallel plate (41) and the second parallel plate (42) are both inclined relative to the axis (X). The first parallel plate (41) is linked with the first turntable (11), and the second parallel plate (42) is linked with the second turntable (12).

2. The beam adjustment mechanism according to claim 1, characterized in that: The axis (X) is either coincident with or parallel to the incident direction of the light beam.

3. The beam adjustment mechanism according to claim 1, characterized in that: The first turntable (11) can be indirectly fixed or de-fixed with the second turntable (12), so that the first turntable (11) can rotate synchronously with the second turntable (12) or rotate independently relative to the second turntable (12).

4. The beam adjustment mechanism according to claim 3, characterized in that: The beam adjustment mechanism also includes a first turntable central axis (21) and a first carrier (31). The first parallel plate (41) is fixed on the first carrier (31). The first turntable (11) and the first carrier (31) are clamped together from both sides of the first turntable central axis (21) and rotated synchronously. The first turntable (11) can be fixed or unfixed to the first turntable central axis (21). The beam adjustment mechanism also includes a second turntable central axis (22) and a second carrier (32). The second parallel plate (42) is fixed on the second carrier (32). The second turntable (12) and the second carrier (32) are clamped together from both sides of the second turntable central axis (22) and rotate synchronously.

5. The beam adjustment mechanism according to claim 4, characterized in that: The second turntable (12) is fixed to the second carrier (32) by a first screw (121) passing axially through the central shaft (22) of the second turntable; The first turntable (11) and the first carrier (31) are locked by a threaded connection, or the first turntable (11) is fixed to the first carrier (31) by a second screw (111) passing axially through the central shaft (21) of the first turntable.

6. The beam adjustment mechanism according to claim 5, characterized in that: The beam adjustment mechanism also includes a first side set screw (211) and a second side set screw (221). The first side set screw (211) passes through the central axis (21) of the first turntable and abuts against the peripheral wall of the first turntable (11) or the first carrier (31) radially. The second side set screw (221) passes through the central axis (22) of the second turntable and abuts against the peripheral wall of the second turntable (12) or the second carrier (32) radially.

7. The beam adjustment mechanism according to claim 5, characterized in that: The beam adjustment mechanism also includes a ring-shaped double turntable carrier (5), the first carrier (31) is at least partially located inside the double turntable carrier (5), the double turntable carrier (5) is fixed to the first carrier (31) by a third screw (51), the second turntable central axis (22) and the second carrier (32) are each at least partially located inside the double turntable carrier (5), the double turntable carrier (5) is fixed to the second turntable central axis (22) by a fourth screw (52), and the double turntable carrier (5) can also be fixed to the second carrier (32) by a fifth screw (53).

8. A beam adjustment mechanism, comprising a first wedge plate (61) and a second wedge plate (62) through which a beam passes; characterized in that: The beam adjustment mechanism also includes a first turntable (11) and a second turntable (12). The rotation axes of the first turntable (11) and the second turntable (12) are both axis (X). The first wedge plate (61) is linked with the first turntable (11), and the second wedge plate (62) is linked with the second turntable (12).

9. The beam adjustment mechanism according to claim 8, characterized in that: The first turntable (11) can be directly or indirectly fixed or de-fixed with the central axis (21) of the first turntable, so that the first turntable (11) can rotate synchronously with the second turntable (12) or rotate independently relative to the second turntable (12).

10. The beam adjustment mechanism according to claim 9, characterized in that: The beam adjustment mechanism also includes a first turntable central axis (21) and a first carrier (31). The first wedge plate (61) is fixed on the first carrier (31). The first turntable (11) and the first carrier (31) are clamped together from both sides of the first turntable central axis (21) and rotate synchronously. The first turntable (11) can be fixed or unfixed with the first turntable central axis (21). The beam adjustment mechanism also includes a second turntable central axis (22) and a second carrier (32). The second wedge plate (62) is fixed on the second carrier (32). The second turntable (12) and the second carrier (32) are clamped together from both sides of the second turntable central axis (22) and rotate synchronously.

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