Optical element mounting seat

Abstract

The utility model belongs to the field of prism mounting and adjusting devices, and particularly relates to an optical element mounting seat. The optical element mounting base comprises a bottom plate used for being supported and fixed to a platform, the bottom plate is provided with at least two first penetrating holes allowing fixing screws to penetrate through, the hole diameter of each first penetrating hole is larger than the diameter of the rod portion of each fixing screw, a rotatable base plate is installed in each first penetrating hole, and each base plate is provided with a second penetrating hole allowing the corresponding fixing screw to penetrate through. The second through hole is a strip-shaped long hole, the width of the hole is smaller than the aperture of the first through hole, and the base plate is provided with a pressing face for the head of the fixing screw to press so as to fix the bottom plate to the platform. During use, the fixing screw needs to pass through the second through hole firstly, and the head of the fixing screw is in pressing contact with the pressing surface of the base plate, so that the size of the head of the fixing screw is reduced, and the weight and the required cost are reduced.

Description

Technical Field

[0001] The utility model relates to an optical element mounting seat and belongs to the field of prism mounting and adjusting 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 polarization beam splitters, it is usually necessary to ensure that the incident light is perpendicular to the incident surface, and the transmitted light and reflected light have the same light height in the same optical path. Ordinary fixed bases are limited by the limitations of materials and processing accuracy, and cannot completely guarantee that the direction and orientation of the light beam after installation are exactly consistent with the requirements. Therefore, a better mechanical structure is needed to assist in adaptive adjustment.

[0003] In the prior art, the utility model patent with application number 2023225742556 provides a lifting platform and a laser system using the lifting platform, wherein the lifting platform (i.e., the optical element mounting seat) can adjust the height in the vertical direction, but it cannot adjust the position in the X and Y directions. At present, when the mounting seat is fixed on the platform, it is generally through a plurality of fixing screws. The mounting seat usually includes a base plate, and the base plate is provided with a plurality of fixing screw through holes for the fixing screws to pass through one by one, and the platform is provided with threaded holes that cooperate with the fixing screws. Most of the polarization beam splitter prism mounting seats in the prior art rely on the matching accuracy of the machined parts to ensure the accuracy of the azimuth direction of the light beam. Some structures can also be adjusted in one direction. For example, the fixing screw through hole on the base plate is set to a circular hole that is much larger than the screw diameter of the fixing screw. In this way, when the fixing screw is loosened, the mounting seat can be moved, and then the position of the mounting seat can be adjusted in the X and Y directions, and the size of the circular hole determines the range in which the mounting seat can be adjusted. When using this solution, the head of the fixing screw needs to be larger than the size of the circular hole so that the head of the fixing screw can press the base plate after adjustment to fix the position of the mounting seat. However, this also leads to an increase in the material used to manufacture the head of the fixing screw, which increases weight and cost, and only non-standard fixing screws can be selected. Fixing screws that meet the requirements need to be separately processed and manufactured, which causes inconvenience in use. Utility Model Content

[0004] The utility model aims to provide an optical element mounting seat to solve the problems in the prior art that the head of the fixing screws on the mounting seat bottom plate that can be used to adjust the position is heavy and the cost is high.

[0005] In order to achieve the above-mentioned purpose, the optical element mounting seat in the utility model adopts the following technical solutions:

[0006] An optical element mounting seat comprises a base plate for supporting and fixing on a platform, wherein the base plate is provided with at least two first through holes for fixing screws to pass through and the hole diameter is larger than the rod diameter of the fixing screws, a rotatable pad is installed in the first through holes or at positions on the base plate corresponding to the first through holes, the pad is provided with a second through hole for fixing screws to pass through, the second through hole is a strip-shaped long hole and the width of the hole is smaller than the hole diameter of the first through hole, and the pad has a pressing surface for the head of the fixing screw to press against to fix the base plate on the platform.

[0007] The beneficial effect of the above technical solution is that: the utility model belongs to an improved invention, a rotatable pad is set at the first through hole of the base plate or at a position corresponding to the first through hole, the pad has a second through hole for the fixing screw to pass through, the second through hole is a strip-shaped long hole and the width of the hole is smaller than the aperture of the first through hole, when in use, the head of the fixing screw is pressed against the top pressure surface of the pad, compared with the technical solution of directly passing the fixing screw through the first through hole so that its head is pressed against the base plate, this solution can make the head size of the fixing screw smaller, effectively reducing the weight of the head of the fixing screw and the required cost. In addition, after loosening the fixing screw, the mounting seat is moved in the desired direction so that the hole wall of the second through hole of the pad contacts the fixing screw and is pressed, thereby causing the pad to rotate under force to adapt to the position of the fixing screw, avoiding the base plate from being stuck, and realizing the adjustment of the base plate in the X and Y directions.

[0008] Furthermore, the pad can be rotatably installed in the first through hole, the first through hole is a stepped hole and includes a large-diameter hole at the top and a small-diameter hole at the bottom, and the pad can be rotatably installed in the large-diameter hole.

[0009] Furthermore, the backing plate is rotatably installed in the large-diameter hole through a matching clearance between the backing plate and the large-diameter hole, and the step surface between the small-diameter hole and the large-diameter hole is used to support the backing plate.

[0010] Furthermore, the length of the second through hole is equal to the diameter of the small-diameter hole.

[0011] Furthermore, the width of the second through hole is smaller than half of the diameter of the small-diameter hole.

[0012] Furthermore, the thickness of the backing plate is less than or equal to the hole depth of the large-diameter hole.

[0013] Furthermore, the bottom plate is a rectangular plate, and two first through holes are respectively arranged at two ends of the bottom plate in the length direction.

[0014] Furthermore, the optical element mounting seat also includes at least two adjustment plates arranged above the base plate and spaced apart in an upper and lower manner. The ends of two adjacent adjustment plates and the end of the lowest adjustment plate and the base plate are connected respectively by flexible connection parts, and one end of each adjustment plate away from the corresponding flexible connection part is threadedly assembled with a tightening screw.

[0015] Furthermore, the lowest adjustment plate is the lower adjustment plate, the adjacent adjustment plate above the lower adjustment plate is the middle adjustment plate, and the connection positions of the lower adjustment plate and the bottom plate and the connection positions of the lower adjustment plate and the middle adjustment plate are respectively located at opposite ends of the lower adjustment plate.

[0016] Furthermore, there are three adjustment plates in total, the adjustment plate above the middle adjustment plate is the upper adjustment plate, and the connection positions of the middle adjustment plate and the upper adjustment plate and the connection positions of the middle adjustment plate and the lower adjustment plate are respectively located on two vertically adjacent sides of the middle adjustment plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of an embodiment of an optical element mounting seat of the utility model;

[0018] Figure 2 A top view of an embodiment of an optical element mounting seat of the utility model;

[0019] Figure 3 It is a front view of an embodiment of the optical element mounting seat of the utility model;

[0020] Figure 4 A side view of an embodiment of an optical element mounting seat of the utility model;

[0021] Figure 5 It is a schematic diagram of the backing plate structure in the embodiment of the optical element mounting seat of the utility model.

[0022] In the figure: 1, bottom plate; 1a, first through hole; 1a1, large diameter hole; 1a2, small diameter hole; 1a3, step surface; 2, pad; 2a, second through hole; 2b, top pressure surface; 3, upper adjustment plate; 4, middle adjustment plate; 5, lower adjustment plate; 6, flexible connection part A; 7, flexible connection part B; 8, flexible connection part C; 9, threaded hole A; 10, threaded hole B; 11, threaded hole C; 12, lug A; 13, lug B; 14, cage structure; 15, rubber head top screw. 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: a rotatable pad is arranged on the bottom plate of the optical element mounting seat, the pad is in the first through hole or is located on the bottom plate at a position corresponding to the first through hole, a second through hole is arranged on the pad for the fixing screw to pass through, the second through hole is a strip-shaped long hole and the width of the hole is smaller than the aperture of the first through hole, and the pad has a pressing surface for the head of the fixing screw to press to fix the bottom plate on the platform. When in use, the fixing screw needs to pass through the second through hole first so that its head is pressed against the pressing surface of the pad, so that the size of its head can be smaller, thereby effectively reducing the weight of the head of the fixing screw and the required cost.

[0025] Embodiments of the optical element mounting seat in the utility model:

[0026] like Figure 1-4 As shown, the optical element mounting seat includes a bottom plate 1 for supporting and fixing on a platform, and the bottom plate 1 is provided with at least two first through holes 1a for fixing screws to pass through and having a hole diameter larger than the rod diameter of the fixing screws. In this embodiment, there are four first through holes 1a. Specifically, the bottom plate 1 is a rounded rectangular plate, and two first through holes 1a are respectively provided at both ends in the length direction of the rounded rectangular bottom plate 1. In other embodiments, the bottom plate can be set as a circular plate or an elliptical plate, and a plurality of first through holes, such as three, are correspondingly provided.

[0027] In this embodiment, a rotatable backing plate 2 is installed in each first through hole 1a. Figure 1 , Figure 2 , Figure 5 As shown, the backing plate 2 is provided with a second through hole 2a for a fixing screw (not shown in the figure) to pass through. The second through hole 2a is a strip-shaped long hole and the width of the hole is smaller than the aperture of the first through hole 1a. Specifically, the width of the second through hole 2a is less than half of the aperture of the small-diameter hole 1a2. When the hole width of the second through hole 2a is small, a fixing screw with a smaller head size can be used accordingly to reduce the weight and cost of the fixing screw head. Preferably, when the width of the second through hole 2a is adapted to the rod diameter of the fixing screw, the meaning of "adaptation" is that it is convenient for the rod of the fixing screw to pass through, and the rod will not cause a large movement in the through hole. The purpose is to make the fixing screw use standard parts, without the need for separate processing and manufacturing, convenient configuration, and minimize the cost of the fixing screw. In addition, the backing plate 2 has a pressing surface 2b for the head of the fixing screw to press to fix the base plate 1 on the platform. The fixing screw presses and contacts the pressing surface 2b to fasten the optical element mounting seat to the connecting platform.

[0028] like Figure 1-2As shown, the first through hole 1a is a stepped hole, including a large diameter hole 1a1 at the top and a small diameter hole 1a2 at the bottom, and the pad 2 is rotatably installed in the large diameter hole 1a1 through the matching clearance between the pad 2 and the large diameter hole 1a1. The thickness of the pad 2 is equal to the hole depth of the large diameter hole 1a1, so that the pad 2 does not protrude from the base plate 1, avoiding occupying the use space above the base plate 1. The aperture of the small diameter hole 1a2 is equal to the length of the second through hole 2a on the pad 2, so that the utilization of the second through hole 2a is maximized, avoiding the waste of space in the second through hole 2a or the small diameter hole 1a2. There is a step surface 1a3 between the large diameter hole 1a1 and the small diameter hole 1a2, and the step surface 1a3 is used to support the pad 2. When the fixing screw is tightened, it bears part of the pressure on the pad 2, prolongs the service life of the pad 2, reduces the frequency of replacing the pad 2 and thus reduces the maintenance cost; at the same time, the step surface 1a3 can ensure the pressing effect of the fixing screw on the base plate, making the connection between the optical element mounting seat and the platform more stable and reliable.

[0029] like Figure 1 , Figure 3 , Figure 4 As shown, three adjustment plates, namely, an upper adjustment plate 3, a middle adjustment plate 4 and a lower adjustment plate 5, are arranged above the bottom plate 1, a flexible connection portion B7 connected to the middle adjustment plate 4 is provided at the left end of the lower adjustment plate 5, a flexible connection portion A6 connected to the bottom plate 1 is provided at the right end of the lower adjustment plate 5, and a flexible connection portion C8 connected to the upper adjustment plate is provided at the front end of the middle adjustment plate 4. The flexible connection portion supports the adjustment plates connected above, and can avoid unnecessary relative movement between the adjustment plates in the vertical direction, thereby ensuring the accuracy and stability of the adjustment.

[0030] The left end of the lower adjustment plate 5 and the right end of the middle adjustment plate 4 are respectively provided with lugs A12 and B13, which are beautiful and can also reduce the production cost. Lugs A12 and B13 are respectively provided with threaded holes B10 and C11. The end of the upper adjustment plate 3 away from the flexible connection part C8 is provided with a threaded hole A9 in the middle of the length direction. The threaded holes are all provided at the end away from the corresponding flexible connection part, so that the force arm during adjustment is the longest, which can make the adjustment more labor-saving. The threaded holes are all provided with matching tightening screws (not shown in the figure). By screwing the tightening screws at the threaded hole B10 or the threaded hole C11, the mounting seat can be tilted to the left or right. When the two tightening screws are adjusted to the same height, the height of the mounting seat in the vertical direction can be adjusted; by screwing the tightening screws at the threaded hole A9, the mounting seat can be tilted forward or backward.

[0031] like Figure 1 , Figure 3 , Figure 4As shown, a cage structure 14 is fixedly connected to the upper adjustment plate 3. In this embodiment, the upper adjustment plate 3 and the bottom plate of the cage structure 14 are formed integrally. In other embodiments, the cage structure can be fixedly connected or bonded to the upper adjustment plate 3 by screws. The upper, lower and rear sides of the cage structure 14 are solid plates to prevent stray light from radiating outward, and the remaining left, right and front three sides are hollowed out and connected and supported by steel columns, wherein the left side is the incident light low beam port, the right side is the transmitted light outlet port, and the front side is the split light beam outlet port. Rubber head top screws 15 are provided at the four corners of the top of the cage structure 14. The rubber head top screws 15 pass through the top plate of the cage structure 14 and contact the optical element inside the cage structure 14. Tightening the rubber head top screws 15 can fix the optical element. In other embodiments, the rubber head top screws are only set to two, three, five or more, which can fix the prism.

[0032] When in use: gently push the optical element (in this embodiment, a polarization beam splitter prism) from one side of the cage structure 14, and after reaching the desired position, fix it by tightening the four rubber head screws 15. The cage structure 14 can ensure the reliability of the optical element after fixation. After the optical element is fixed, loosen the fixing screws at the four pads 2, move the mounting seat in the desired direction, so that the hole wall of the second through hole 2a of 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 avoid the bottom plate being stuck, realize the movement of the mounting seat in the desired direction, and reach the appropriate position, and finally tighten the four fixing screws to fix the mounting seat, and complete the movement adjustment of the mounting seat in a certain direction in the plane where the connection platform is located. After the mounting base is fixed, screwing the threaded hole A9 can adjust the forward and backward swing of the cage structure 14, and adjust the direction and height propagation of the split light beam; screwing the threaded hole B10 and the threaded hole C11 together can adjust the height of the cage structure 14; screwing the threaded hole B10 or the threaded hole C11 alone can make the cage structure 14 tilt and swing to the left or right, so that the incident light is incident on the optical element vertically.

[0033] In other embodiments, the thickness of the backing plate may be smaller than the depth of the large-diameter hole. Of course, in other embodiments, the thickness of the backing plate may be greater than the depth of the large-diameter hole.

[0034] In other embodiments, the backing plate may not be arranged in the first through hole, but a mounting frame may be arranged above the corresponding first through hole on the bottom plate, and the mounting frame may be provided with a through hole, and the backing plate may be rotatably mounted in the through hole of the mounting frame.

[0035] In other embodiments, the rotational cooperation between the pad and the first perforation can also be: a groove is provided on the step surface, a convex plate is provided at the corresponding position of the bottom of the pad to cooperate with the groove, and the convex plate at the bottom of the pad is placed in the groove of the step surface and can rotate around the circumference of the groove.

[0036] In other embodiments, two adjustment plates can be set, for example, only a lower adjustment plate and a middle adjustment plate are set, and the connection positions of the lower adjustment plate and the middle adjustment plate and the connection positions of the lower adjustment plate and the bottom plate are respectively located on two vertically adjacent side edges of the lower adjustment plate, and threaded holes are provided on the ends of the lower adjustment plate and the middle adjustment plate away from the flexible connection portion. By adjusting the matching tightening screws of the two threaded holes at the same time, the height adjustment of the mounting seat in the vertical direction can be achieved, and when the tightening screws are adjusted alone, the tilting of the mounting seat in the front and back or left and right directions can be achieved; when the connection positions of the lower adjustment plate and the middle adjustment plate and the connection positions of the lower adjustment plate and the bottom plate are respectively located on the left and right sides of the lower adjustment, by adjusting the matching tightening screws of the two threaded holes at the same time, the height adjustment of the mounting seat in the vertical direction can also be achieved, and when the tightening screws are adjusted alone, the tilting of the mounting seat in the left and right directions can be achieved.

[0037] In other embodiments, more than three adjustment plates may be provided, and flexible connection portions between adjacent adjustment plates may be adaptively provided as required.

[0038] In other embodiments, the width of the second perforation may be equal to half of the diameter of the small-diameter hole, and may be greater than half, but should be smaller than the diameter of the small-diameter hole.

[0039] 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 mounting seat, comprising a base plate for supporting and fixing on a platform, the base plate being provided with at least two first through holes for fixing screws to pass through and having a hole diameter larger than the rod diameter of the fixing screws, characterized in that: A rotatable pad is installed in the first through hole or at a position on the base plate corresponding to the first through hole, and a second through hole is provided on the pad for a fixing screw to pass through. The second through hole is a long strip hole and the width of the hole is smaller than the diameter of the first through hole. The pad has a pressing surface for the head of the fixing screw to press against to fix the base plate on the platform.

2. The optical element mounting seat according to claim 1, characterized in that: The backing plate is rotatably installed in the first through hole, the first through hole is a stepped hole and includes a large-diameter hole at the top and a small-diameter hole at the bottom, and the backing plate is rotatably installed in the large-diameter hole.

3. The optical element mounting seat according to claim 2, characterized in that: The backing plate is rotatably installed in the large-diameter hole through the matching clearance between the backing plate and the large-diameter hole, and the step surface between the small-diameter hole and the large-diameter hole is used to support the backing plate.

4. The optical element mounting seat according to claim 3, characterized in that: The length of the second through hole is equal to the diameter of the small-diameter hole.

5. The optical element mounting seat according to claim 3 or 4, characterized in that: The width of the second through hole is smaller than half of the diameter of the small-diameter hole.

6. The optical element mounting seat according to claim 3 or 4, characterized in that: The thickness of the pad is less than or equal to the depth of the large diameter hole.

7. The optical element mounting seat according to any one of claims 1 to 4, characterized in that: The bottom plate is a rectangular plate, and two first through holes are respectively arranged at two ends of the bottom plate in the length direction.

8. The optical element mounting seat according to any one of claims 1 to 4, characterized in that: The optical element mounting seat also includes at least two adjustment plates arranged above the base plate and spaced apart in an upper and lower manner. The ends of two adjacent adjustment plates and the end of the lowest adjustment plate and the base plate are connected respectively by flexible connection parts. One end of each adjustment plate away from the corresponding flexible connection part is threadedly equipped with a tightening screw for tightening the corresponding base plate or the corresponding adjustment plate below.

9. The optical element mounting seat according to claim 8, characterized in that: The lowest adjustment plate is the lower adjustment plate, the adjustment plate adjacent to the lower adjustment plate is the middle adjustment plate, and the connection positions of the lower adjustment plate and the bottom plate and the connection positions of the lower adjustment plate and the middle adjustment plate are respectively located at opposite ends of the lower adjustment plate.

10. The optical element mounting seat according to claim 9, characterized in that: There are three adjustment plates in total. The adjustment plate above the middle adjustment plate is the upper adjustment plate. The connection positions of the middle adjustment plate and the upper adjustment plate and the connection positions of the middle adjustment plate and the lower adjustment plate are respectively located on two vertically adjacent sides of the middle adjustment plate.

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