Optical element fixing base

Abstract

The utility model belongs to the field of prism mounting and adjusting devices, and particularly relates to an optical element fixing base. The optical element fixing base comprises at least three platens which are vertically arranged at intervals, a mounting structure used for mounting an optical element is arranged on the uppermost platen, and the ends of every two vertically adjacent platens are connected through a flexible connecting part. One end, far away from the flexible connecting part of the lower bedplate, of each of the rest bedplates except the lowest bedplate is in threaded assembly with a threaded pressing piece used for tightly pressing the lower bedplate, and the rest bedplates except the uppermost bedplate and the lowest bedplate are in threaded assembly with a threaded pressing piece used for tightly pressing the lower bedplate; one end, far away from the flexible connecting part of the lower bedplate, of the bedplate is respectively overhung to the outer side of the upper bedplate to form an overhanging end, the corresponding threaded jacking piece is assembled on the overhanging end, and the bedplate below the overhanging end is provided with a jacking surface for the threaded jacking piece to jack. Therefore, an operation avoiding hole does not need to be formed in the upper platen, and the application range of the optical element fixing base is effectively expanded.

Description

Technical Field

[0001] The utility model relates to an optical element fixing base, belonging to the field of prism installation and adjustment devices. Background Art

[0002] With the development of laser technology and the continuous expansion of its application fields, polarization beam splitters are widely used in pulse energy regulation, beam splitting and light isolation. Polarization beam splitters can decompose incident non-polarized light into two perpendicular linear polarized light beams. Polarization beam splitters have high requirements for clamping and direction adjustment during use. When installing and debugging the polarization beam splitter, install the polarization beam splitter on the polarization beam splitter base, and adjust the front and back or left and right swing, vertical height and horizontal position of the polarization beam splitter base to make the incident light perpendicular to the incident surface of the polarization beam splitter, and make the transmitted light and reflected light have the same light height in the same optical path.

[0003] In the existing optical element fixing base, such as the Chinese utility model patent with authorization announcement number CN221121700U and authorization announcement 2024.06.11, a lifting platform and a laser system using the lifting platform are disclosed. The lifting platform (i.e., the optical element fixing base) includes at least three table plates arranged at intervals up and down, and an elastic connection part (i.e., a flexible connection part) for connecting the two adjacent table plates is provided between the ends of the two adjacent table plates, and the elastic connection part is alternately arranged at the opposite ends from top to bottom. With the opening direction of the elastic connection part as the inner side, a threaded pressing part for pressing the lower table plate is provided at one end of the table plate away from the elastic connection part of the adjacent lower table plate, and a corresponding threaded through hole is provided on the table plate, and the threaded pressing part is located on the inner side of the elastic connection part between the table plate and the adjacent upper table plate, and the operating tool cannot operate the threaded pressing part from the side, so an operating avoidance hole for allowing the operating tool to pass through to screw the threaded pressing part is provided at the corresponding position of the upper table plate. By screwing the threaded top pressure piece, the distance between two adjacent table plates can be adjusted, thereby realizing the height adjustment of the entire lifting platform, and when the heights of the threaded top pressure pieces at the two opposite ends are different, the lifting platform can also be tilted and rotated. In addition, the topmost table plate is provided with a mounting hole for mounting optical elements, so the lifting platform can realize the installation and adjustment of optical elements.

[0004] However, since the topmost table is provided with an operation avoidance hole and a threaded through hole for installing a threaded top pressing piece, when the optical element is large in size and presses the operation avoidance hole and the threaded through hole, the optical element fixing base cannot be adjusted and used normally. Therefore, the optical element fixing base can only be used for optical elements of smaller sizes, so that the optical element is located between the operation avoidance hole and the threaded through hole to ensure that the optical element fixing base can be adjusted and used normally, thereby making the top area utilization rate of the optical element fixing base low and limiting the scope of application. In addition, the operation avoidance hole set on the table will reduce the strength of the table itself. Utility Model Content

[0005] The utility model aims to provide an optical element fixing base to solve the problem that the table in the existing optical element fixing base needs to be provided with an operation avoidance hole, resulting in a low utilization rate of the top area of ​​the optical element fixing base, a limited scope of application and reduced strength of the table itself.

[0006] In order to achieve the above-mentioned purpose, the optical element fixing base in the utility model adopts the following technical solutions:

[0007] An optical element fixing base comprises at least three table plates spaced apart from each other in an upper and lower direction, wherein the uppermost table plate is provided with a mounting structure for mounting an optical element, and the ends of two adjacent upper and lower table plates are respectively connected by flexible connecting parts, and the ends of the remaining table plates except the lowermost table plate, which are away from the flexible connecting parts with the lower table plate, are respectively threadedly fitted with threaded pressing pieces for tightening the lower table plate, and the characteristic is that: among the remaining table plates except the uppermost table plate and the lowermost table plate, the ends of the table plates which are away from the flexible connecting parts with the lower table plate are respectively cantilevered to the outside of the upper table plate to form cantilevered ends, and corresponding threaded pressing pieces are fitted on the cantilevered ends, and the table plate below the cantilevered end has a tightening surface for the threaded pressing piece to tighten.

[0008] The beneficial effect of the above technical scheme is that the utility model belongs to an improved invention. In the remaining table plates except the top table plate and the bottom table plate, one end of the table plate away from the flexible connection part with the lower table plate is cantilevered to the outside of the upper table plate to form a cantilevered end, so that the corresponding threaded top pressure piece is assembled on the cantilevered end, and the table plate below the cantilevered end has a tightening surface for the threaded top pressure piece to tighten, and the distance between two adjacent table plates can be adjusted by screwing the threaded top pressure piece, so as to achieve the height adjustment of the entire lifting platform, and when the heights of the threaded top pressure pieces at the two opposite ends are different, the lifting platform can also be tilted and rotated. The opening direction of the flexible connection part is defined as the inside, then the cantilevered end and the corresponding threaded top pressure piece are both located outside the flexible connection part, so the operating tool can be screwed directly on the side of the table plate without being blocked by the flexible connection part, and there is no need to set an operation avoidance hole on the upper table plate, so that the strength of the table plate itself will not be reduced due to the need to set the operation avoidance hole. At the same time, there is no need to set an operation avoidance hole on the upper table plate, and the size selection range of the optical component is wider. It only needs to not cover the installation hole of the uppermost threaded top pressure piece, thereby effectively expanding the application range of the optical component fixing base and maximizing the utilization rate of the top area of ​​the optical component fixing base.

[0009] Furthermore, the width of the overhanging end is smaller than the width of the table top body of the table top, and the overhanging end is arranged centrally relative to the table top body.

[0010] Furthermore, a transitional curved surface is provided at a connection position between the overhanging end and the table plate body.

[0011] Furthermore, the threaded pressing member is a tightening screw.

[0012] Furthermore, the mounting structure is a cage clamp connected to the top surface of the topmost platform, the cage clamp includes a plurality of columns fixedly connected to the top surface of the topmost platform and a top plate fixed on the top of each column, the space enclosed by each column and the top plate is used to place optical elements, and tightening bolts for tightening the optical elements are installed on the top plate.

[0013] Furthermore, four columns are provided, the top plate is rectangular, the columns are connected to the four corners of the top plate, the space is used to place the beam splitter prism, the cage clamp also includes a side plate fixed between the top plate, two adjacent columns and the topmost table plate, and the remaining sides of the cage clamp are open and respectively form a light inlet, a light outlet and a light splitting port.

[0014] Furthermore, among the remaining table tops except the uppermost table top and the lowermost table top, the flexible connection portion between at least one table top and the lower table top and the flexible connection portion between at least one table top and the upper table top are respectively located on two vertically adjacent side edges of the table top.

[0015] Furthermore, each platform includes an S-shaped platform group consisting of an upper platform, a middle platform and a lower platform adjacent to each other, wherein the flexible connection parts between the middle platform and the lower platform and the flexible connection parts between the middle platform and the upper platform are respectively located at opposite ends of the middle platform.

[0016] Furthermore, both ends of the lowermost platform plate have fixed sections that are longer than the upper platform plate, and the fixed sections are provided with fixing structures for fixing the lowermost platform plate on the operating platform.

[0017] Furthermore, a stepped hole which is larger at the top and smaller at the bottom is provided on the fixed section, a rotatable pad is installed in the large hole section of the stepped hole, a strip-shaped long hole is provided on the pad, the width of the strip-shaped long hole is smaller than the aperture of the small hole section of the stepped hole, and the pad has a pressing surface for the head of the fixing screw to press against. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of an embodiment of an optical element fixing base of the utility model;

[0019] Figure 2 It is a front view of an embodiment of an optical element fixing base of the utility model;

[0020] Figure 3 A side view of an embodiment of an optical element fixing base of the utility model;

[0021] Figure 4 It is a top view of an embodiment of an optical element fixing base of the utility model.

[0022] In the figure: 1, fixed section; 2, pad; 3, table top one; 4, table top two; 5, table top three; 6, table top four; 7, flexible connection part A; 8, flexible connection part B; 9, flexible connection part C; 10, threaded hole A; 11, threaded hole B; 12, threaded hole C; 13, overhang end one; 14, overhang end two; 15, cage clamp; 151, side panel; 152, column; 153, top plate; 16, tightening bolt. DETAILED DESCRIPTION

[0023] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0024] In view of the technical problems existing in the prior art, the basic technical concept of the utility model is: on the remaining table plates other than the top table plate and the bottom table plate, one end of the flexible connection part away from the lower table plate is cantilevered to the outside of the upper table plate to form a cantilevered end, so that the corresponding threaded pressing part is assembled on the cantilevered end, and the table plate below the cantilevered end has a tightening surface for the threaded pressing part to tighten, and the opening direction of the flexible connection part is the inside, so that the cantilevered end and the corresponding threaded pressing part are both located on the outside of the flexible connection part, and the operating tool can be screwed directly on the side of the table plate without being blocked by the flexible connection part, and there is no need to set an operation avoidance hole on the upper table plate. Therefore, the optical element only needs to not cover the perforation of the threaded pressing part, thereby effectively expanding the application range of the optical element fixing base and maximizing the utilization rate of the top area of ​​the optical element fixing base. At the same time, the strength of the table plate itself is also enhanced.

[0025] Embodiments of the optical element fixing base in the utility model:

[0026] like Figure 1-3 As shown, the optical element fixing base includes at least three platforms spaced apart from each other. In this embodiment, there are four platforms in total, which are platform 1 3, platform 2 4, platform 3 5 and platform 4 6 from top to bottom. The ends of two adjacent platform plates are connected by flexible connecting parts, wherein a flexible connecting part C9 is provided between the front end of platform 2 4 and the front end of the upper platform 1 3, a flexible connecting part B8 is provided between the left end of platform 2 4 and the left end of platform 3 5, and a flexible connecting part A7 is provided between the right end of platform 3 5 and the right end of platform 4 6. The flexible connecting part has a supporting effect on the platform plates connected above, which can avoid unnecessary relative movement between the platform plates in the vertical direction, and ensure the accuracy and stability of the adjustment. Platform 2 4, platform 3 5 and platform 4 6 together form an S-shaped platform group, which has a simple structure and is easy to manufacture, and makes the optical element fixing base more stable. The flexible connection part B8 and the flexible connection part C9 on the platform 2 4 are arranged at two vertically adjacent side edges of the platform 2 4 , so that the optical element fixing base can be adjusted in multiple directions and angles.

[0027] like Figure 2 and Figure 3As shown, the left end of the table three 5 away from the flexible connection part A7 is provided with an overhang end 13, and the overhang end 13 is overhanging to the outside of the table two 4, that is, it is overhanging to the outside of the upper table. The width of the overhang end 13 is less than the width of the table main body of the table three 5, which can save production materials and reduce costs. The overhang end 13 is arranged in the center relative to the table main body, and the connection position between the overhang end 13 and the table main body has a transition arc surface, so that the overhang end 13 and the table main body have a smooth transition, which is not easy to crack and more beautiful. The right end of the table two 4 is set as the overhang end 2 14, and the overhang end 2 14 has the same structure as the overhang end 13, and is symmetrical relative to the center line of the optical element fixing base.

[0028] like Figure 2 and Figure 4 As shown, the ends of the remaining table plates, except for the table plate 4 6, which are away from the flexible connection part with the lower table plate, are respectively threadedly assembled with threaded pressing pieces (not shown in the figure) for tightening the lower table plate. In this embodiment, the threaded pressing pieces are set as tightening screws (not shown in the figure), so that the structure of the threaded pressing pieces is simple and easy to operate, and the tightening screws can use standard parts to reduce the production and use costs. Among them, the overhanging end 13 on the table plate 3 5 is provided with a threaded hole B11, the overhanging end 14 on the right end of the table plate 2 4 is provided with a threaded hole C12, and the rear end of the table plate 1 3 is provided with a threaded hole A10, and the threaded holes are matched with corresponding tightening screws, and the corresponding lower table plate has a pressing surface for tightening the tightening screw. By screwing the tightening screw at the threaded hole B11 or the threaded hole C12, the optical element fixing base can be tilted to the left or right; by screwing the tightening screw at the threaded hole A10, the optical element fixing base can be tilted forward or backward; when the three tightening screws are adjusted to the same height, the vertical height of the optical element fixing base can be adjusted.

[0029] like Figure 1 , Figure 2 and Figure 4As shown, the left and right ends of the table plate 4 6 respectively have a fixing section 1 that is longer than the table plate 3 5, and the fixing section 1 is provided with a fixing structure for fixing the table plate 4 6 on the operating platform (not shown in the figure). The fixing structure includes a stepped hole (not shown in the figure) that is larger at the top and smaller at the bottom and is provided on the fixing section 1. In the present embodiment, there are four stepped holes, and a rotatable pad 2 is installed in each of the large hole sections of the stepped holes. The pad 2 is provided with a strip-shaped long hole for a fixing screw (not shown in the figure) to pass through, and the width of the strip-shaped long hole is smaller than the aperture of the small hole section of the stepped hole. The pad 2 has a pressing surface for the head of the fixing screw to press against. When in use, loosen the fixing screw at the pad 2, move the optical element fixing base in the desired direction, so that the wall of the strip-shaped long hole of the pad 2 contacts and is pressed against the fixing screw, and then the pad 2 is forced to rotate to adapt to the position of the fixing screw, so as to prevent the optical element fixing base from being stuck, thereby enabling the optical element fixing base to move in the desired direction, and tighten the fixing screw to fix the optical element fixing base on the operating platform.

[0030] like Figure 1-3 As shown, the top of the uppermost table 3 is provided with a mounting structure for mounting an optical element. In this embodiment, the optical element is a polarization beam splitter prism. The mounting structure is provided as a cage clamp 15. The cage clamp 15 includes a plurality of columns 152 fixedly connected to the table 3. A top plate 153 is fixedly connected to the top of the columns 152. In this embodiment, the top plate 153 is rectangular. Four columns 152 are provided, which are respectively connected to the four corners of the top plate 153. The space enclosed by the columns 152 and the top plate 153 is used to place the polarization beam splitter prism. A tightening bolt 16 for tightening the optical element is installed on the top plate 153 of the cage clamp 15. Four tightening bolts 16 are provided to fix the polarization beam splitter prism. The cage clamp 15 can make the polarization beam splitter prism more stably placed. The cage clamp 15 also includes a side plate 151 on the rear side. The side plate 151 is fixedly connected to two adjacent columns 152 to prevent stray light from radiating outward. The remaining left, right and front three sides of the cage fixture 15 are all open and form a light entrance, a light exit and a light splitting port respectively.

[0031] When in use: gently push the optical element (in this embodiment, a polarization beam splitter prism) from one side of the cage clamp 15, and after reaching the desired position, tighten the four top bolts 16 to fix it. The cage clamp 15 can ensure the reliability of the optical element after it is fixed. After the optical element is fixed, loosen the fixing screws at the four pads 2, and move the optical element fixing base to the desired direction, so that the hole wall of the strip-shaped long hole on the pad 2 contacts and is pressed by the fixing screws, and then the pad 2 is forced to rotate to adapt to the position of the fixing screws, so as to prevent the table four 6 from being stuck, and realize the movement of the optical element fixing base to the desired direction. And when it reaches the appropriate position, tighten the four fixing screws to fix the optical element fixing base on the operating platform, so as to realize the movement and adjustment of the optical element fixing base within the plane where the operating platform is located. After the optical element fixing base is fixed, the tightening screw at the threaded hole A10 can be screwed to adjust the front and back swing of the cage clamp 15, and the direction and height propagation of the split light beam can be adjusted; the height of the cage clamp 15 can be adjusted by screwing the tightening screws at the threaded holes B11 and C12; screwing the threaded hole B11 or C12 alone can make the cage clamp 15 tilt and swing to the left or right, so that the incident light is vertically incident on the optical element.

[0032] In other embodiments, when setting the fixing structure on the fixing section, the step hole and the pad may not be provided, and the fixing section may be directly fixed to the operating platform by screws. The screw holes provided on the fixing section are round holes and are adapted to the size of the screws. In this case, the optical element fixing base cannot adjust the horizontal position relative to the operating platform.

[0033] In other embodiments, the bottom plate may not be provided with a fixed section, and the optical element fixing base can be stably maintained on the operating platform by its own weight.

[0034] In other embodiments, when setting the number of platens, it can be set to three, five or more.

[0035] In other embodiments, when setting the position of the flexible connection part of the table top, the table tops except the bottommost table top can be located on two vertically adjacent side edges of the table top with the flexible connection parts of the bottom table top and the top table top respectively.

[0036] In other embodiments, when setting the positions of the flexible connection parts of the table tops, all the connection parts may be alternately arranged at opposite ends from top to bottom, so that all three adjacent table tops are arranged in an S-shape.

[0037] In other embodiments, when setting the structure of the cage clamp, two columns can be set and set on the same side of the cage clamp, the top plate can be set to a rectangle, the columns are connected to the corresponding corners of the top plate, and the space enclosed by the columns and the top plate is used to place the polarization splitter prism; the two side surfaces of the cage clamp can also be set as solid side panels, leaving the two opposite side surfaces open, which can be used for the use of right-angle prisms.

[0038] In other embodiments, when setting the mounting structure of the optical element, the cage clamp may not be provided, and mounting holes for mounting the optical element may be provided on the topmost platen, and the optical element may be directly mounted on the topmost platen.

[0039] In other embodiments, when a threaded pressing piece is provided, it may not be provided as a tightening screw. In this case, the threaded pressing piece includes a screw plug and a pressing ball. A mounting hole is provided at one end of the screw plug, and a screw hole is provided at the other end. The pressing ball is provided in the mounting hole. When in use, the screw plug is screwed to make the pressing ball press against the pressing surface of the platform below, thereby lifting the platform where the screw plug is located.

[0040] In other embodiments, when setting the connection mode between the overhanging end and the table body of the table, the transition arc surface may not be provided, so that the connection position between the overhanging end and the table body is set at a right angle.

[0041] In other embodiments, when setting the structure of the overhang end, the width of the overhang end may be set to be consistent with the width of the platform on which it is located, and in this case, the threaded hole on the overhang end may be set in the middle of the overhang end.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments without creative work, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An optical element fixing base, comprising at least three plates spaced apart from each other, the top plate being provided with a mounting structure for mounting an optical element, the ends of two adjacent plates being connected by flexible connecting parts, and the ends of the remaining plates, except the bottom plate, being far from the flexible connecting parts with the lower plate being threadedly assembled with threaded pressing parts for tightening the lower plate, characterized in that: In the remaining table plates except the top table plate and the bottom table plate, one end of the table plate away from the flexible connection portion with the lower table plate is cantilevered to the outside of the upper table plate to form a cantilevered end, and a corresponding threaded pressing part is assembled on the cantilevered end, and the table plate below the cantilevered end has a tightening surface for the threaded pressing part to tighten.

2. The optical element fixing base according to claim 1, characterized in that: The width of the overhanging end is smaller than the width of the table plate main body of the table plate, and the overhanging end is arranged centrally relative to the table plate main body.

3. The optical element fixing base according to claim 2, characterized in that: The connection position between the overhanging end and the table plate body is provided with a transitional cambered surface.

4. The optical element fixing base according to any one of claims 1 to 3, characterized in that: The threaded pressing piece is a tightening screw.

5. The optical element fixing base according to any one of claims 1 to 3, characterized in that: The mounting structure is a cage clamp connected to the top surface of the topmost platform. The cage clamp includes a plurality of columns fixedly connected to the top surface of the topmost platform and a top plate fixed on the top of each column. The space enclosed by each column and the top plate is used to place optical elements. The top plate is equipped with tightening bolts for tightening the optical elements.

6. The optical element fixing base according to claim 5, characterized in that: There are four columns, the top plate is rectangular, the columns are connected to the four corners of the top plate, the space is used to place the beam splitter prism, the cage clamp also includes a side plate fixed between the top plate, two adjacent columns and the topmost table, and the remaining sides of the cage clamp are open and respectively form a light inlet, a light outlet and a light splitter port.

7. The optical element fixing base according to any one of claims 1 to 3, characterized in that: Among the remaining table boards except the uppermost table board and the lowermost table board, the flexible connection part between at least one table board and the lower table board and the flexible connection part between at least one table board and the upper table board are respectively located on two vertically adjacent side edges of the table board.

8. The optical element fixing base according to any one of claims 1 to 3, characterized in that: Each platform includes an S-shaped platform group consisting of an upper platform, a middle platform and a lower platform adjacent to each other, wherein the flexible connection parts between the middle platform and the lower platform and the flexible connection parts between the middle platform and the upper platform are respectively located at opposite ends of the middle platform.

9. The optical element fixing base according to any one of claims 1 to 3, characterized in that: Both ends of the lowermost platform plate have fixing sections longer than the upper platform plate, and the fixing sections are provided with fixing structures for fixing the lowermost platform plate on the operating platform.

10. The optical element fixing base according to claim 9, characterized in that: A stepped hole which is larger at the top and smaller at the bottom is provided on the fixed section. A rotatable pad is installed in the large hole section of the stepped hole. The pad is provided with a strip-shaped long hole for the fixing screw to pass through. The width of the strip-shaped long hole is smaller than the aperture of the small hole section of the stepped hole. The pad has a pressing surface for the head of the fixing screw to press against.

Images