Supporting structure for high-precision off-axis parabolic mirror

Abstract

The utility model discloses a supporting structure for a high-precision off-axis parabolic mirror, which relates to the technical field of optical instruments and comprises a support and a mirror seat arranged on the support, a parabolic mirror groove is arranged on one side of the mirror seat, a parabolic mirror is arranged in the parabolic mirror groove, an annular pressing ring is arranged on the mirror seat at an opening of the parabolic mirror groove, and the parabolic mirror is arranged in the annular pressing ring. A step groove is formed in the annular side of the mirror surface of the parabolic mirror, and the inner side of the pressing ring is clamped in the step groove; according to the utility model, the annular pressing ring is matched with the step groove on the annular side of the parabolic mirror, and the parabolic mirror is fixed in the parabolic mirror groove, so that the parabolic mirror is uniformly stressed, and the influence on the mirror surface of the parabolic mirror is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of optical instruments, and specifically relates to a support structure for a high-precision off-axis parabolic mirror. Background Art

[0002] With the continuous development of optoelectronic measurement and testing technologies, higher market demands have been put forward for the accuracy and stability of high-precision optical instruments. Due to the characteristics of the off-axis parabolic mirror, such as no aberration at the geometric focus, simplified optical system, improved imaging quality of the system, reduced size and weight of the instrument, and avoidance of optical system obstruction, it is widely used in large-aperture, wide-spectrum, and high-precision optical instruments.

[0003] The main materials of the off-axis parabolic mirror are glass, silicon, crystal, etc. The commonly used support structure uses a clamping method to fixedly support the parabolic mirror. This support structure has a great influence on the surface shape change of the parabolic mirror surface, resulting in obvious decline in indicators such as PV (peak-valley value) and RMS (root mean square) of the system accuracy after installation compared with the bare mirror, which will have an adverse impact on the subsequent test results.

[0004] In view of this, there is an urgent need for a support structure for a high-precision off-axis parabolic mirror. Content of the Utility Model

[0005] Aiming at the problems existing in the prior art, the utility model solves this problem with the following technical structure.

[0006] To achieve the above object, the utility model adopts the following technical scheme:

[0007] A support structure for a high-precision off-axis parabolic mirror, comprising: a support and a mirror base arranged on the support. A parabolic mirror groove is provided on one side of the mirror base, a parabolic mirror is arranged in the parabolic mirror groove, a ring-shaped retaining ring is arranged at the opening of the parabolic mirror groove on the mirror base, a stepped groove is provided on the circumferential side of the mirror surface of the parabolic mirror, and the inner side of the retaining ring is clamped at the stepped groove.

[0008] Further,

[0009] A plurality of glue grooves are evenly provided on the circumferential side of the parabolic mirror groove on the mirror base.

[0010] Glue injection holes penetrating the groove wall of the parabolic mirror groove are provided at the positions of the glue grooves on the mirror base.

[0011] The glue grooves are strip-shaped.

[0012] A spacer ring and a felt ring are sequentially arranged between the retaining ring and the parabolic mirror.

[0013] The retaining ring is fixed on the mirror base through mounting bolts.

[0014] The support includes a base, a mounting seat and an adjustment assembly. The mounting seat is arranged on the base through the adjustment assembly. A plurality of annular waist-shaped slots distributed in a circular pattern are provided on the mounting seat, and the mirror seat is arranged on the mounting seat through the plurality of annular waist-shaped slots.

[0015] The adjustment assembly includes a plurality of adjustment bolts. An installation plate is provided at the bottom end of the mounting seat. The tops of the plurality of adjustment bolts are rotatably arranged on the installation plate, and the bottoms of the plurality of adjustment bolts are threadedly connected to the base.

[0016] The adjustment assembly further includes a plurality of top bolts. The bottom end of the top bolt is hemispherical. A plurality of limit seats are provided on the base. A spherical groove is formed at the top end of the limit seat. The bottom end of the top bolt is arranged at the spherical groove, and the top end of the top bolt is threadedly connected to the installation plate.

[0017] A plurality of support rods are provided at the bottom of the mirror seat on the mounting seat.

[0018] Adopting the above structure of the present utility model can achieve the following beneficial effects:

[0019] By matching the annular retaining ring with the stepped groove on the side of the parabolic mirror, the parabolic mirror is fixed in the parabolic mirror groove, so that the parabolic mirror is evenly stressed and the influence on the mirror surface of the parabolic mirror is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the present application;

[0021] Figure 2 is a schematic structural diagram of another perspective of the present application;

[0022] Figure 3 is a schematic structural diagram of the relevant structure at the mirror seat in the present application;

[0023] Figure 4 is a schematic structural diagram of the mirror seat in the present application;

[0024] Figure 5 is a schematic structural diagram of the parabolic mirror in the present application;

[0025] Figure 6 is a schematic cross-sectional structural diagram of the structure at the mirror seat in the present application;

[0026] Figure 7 is a schematic structural diagram of the adjustment bolt in the present application;

[0027] Figure 8 is a schematic structural diagram of the top bolt in the present application;

[0028] Figure 9 is a schematic structural diagram of the limit seat in the present application.

[0029] In the figure: 1. Mirror base; 11. Parabolic mirror groove; 12. Glue groove; 13. Glue injection hole; 2. Parabolic mirror; 21. Step groove; 3. Retaining ring; 4. Spacer ring; 5. Felt ring; 6. Mounting base; 61. Annular waist-shaped groove; 62. Mounting plate; 63. Support rod; 7. Base; 71. Limit base; 8. Adjusting bolt; 9. Top bolt. Detailed implementation mode

[0030] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present utility model and the above-mentioned drawings are intended to cover non-exclusive inclusion. For example, a process, method, device, product or equipment including a series of steps or units does not necessarily limit to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these processes, methods, products or equipment.

[0032] The following is a further detailed description of this application in conjunction with the attached Figures 1-9

[0033] Refer to Figures 1-5 A support structure for a high-precision off-axis parabolic mirror shown in the figure includes: a support and a mirror base 1 provided on the support. A parabolic mirror groove 11 is opened on one side of the mirror base 1. A parabolic mirror 2 is arranged in the parabolic mirror groove 11. A circular retaining ring 3 is arranged at the opening of the parabolic mirror groove 11 of the mirror base 1. A step groove 21 is opened on the circumferential side of the mirror surface of the parabolic mirror 2. The inner side of the retaining ring 3 is clamped at the step groove 21. In this way, by matching the circular retaining ring 3 with the step groove 21 on the circumferential side of the parabolic mirror 2, the parabolic mirror 2 is fixed in the parabolic mirror groove 11, so that the parabolic mirror 2 is uniformly stressed and the influence on the mirror surface of the parabolic mirror is reduced.

[0034] Further optimized, as Figure 6 shown in the figure, in order to reduce the damage to the parabolic mirror 2, a spacer ring 4 and a felt ring 5 are sequentially arranged between the retaining ring 3 and the parabolic mirror 2. Isolation is carried out through the spacer ring 4 and the felt ring 5 to play a role of buffering and supporting. The retaining ring 3 is fixed on the mirror base 1 through mounting bolts, which is convenient for disassembly, assembly and maintenance.

[0035] Refer to Figure 3 、 Figure 4 and Figure 6As shown, a plurality of glue grooves 12 are evenly formed on the circumferential side of the parabolic mirror groove 11 of the mirror base 1. The optimal shape of the glue grooves 12 is strip-shaped. The mirror base 1 is provided with glue injection holes 13 penetrating through the groove wall of the parabolic mirror groove 11 at the positions of the glue grooves 12. After the parabolic mirror 2 is installed at the parabolic mirror groove 11, a certain amount of type 703 silicone rubber is injected into the glue grooves 12 through the glue injection holes 13 to support and fix the circumferential side of the parabolic mirror 2. And multi-point support is adopted to adapt to the application environment of alternating hot and cold, facilitating thermal expansion and contraction. Moreover, the glue grooves 12 are arranged on the circumferential side of the parabolic mirror 2, having less influence on the mirror surface of the parabolic mirror 2.

[0036] Reference Figure 1 and Figure 2 As shown, the specific structure of the support includes a base 7, a mounting seat 6 and an adjustment assembly. The mounting seat 6 is arranged on the base 7 through the adjustment assembly. A plurality of annular waist-shaped grooves 61 distributed in a circumferential manner are arranged on the mounting seat 6. The mirror base 1 is arranged on the mounting seat 6 through a plurality of annular waist-shaped grooves 61. By arranging a plurality of annular waist-shaped grooves 61 on the mounting seat 6, it is used to fix the mirror base 1, and the mirror base 1 can rotate on the mounting seat 6 to achieve the function of fine adjustment. And, in order to improve the stability of the support for the mirror base 1, the mounting seat 6 is provided with a plurality of support rods 63 at the bottom of the mirror base 1 to support the mirror base 1 from the bottom.

[0037] Combined with Figure 1 and Figure 2 and Figures 7-9 As shown, in order to facilitate the adjustment of the angle of the parabolic mirror 2, the adjustment assembly includes a plurality of adjustment bolts 8. The bottom end of the mounting seat 6 is provided with a mounting plate 62. The top ends of a plurality of adjustment bolts 8 are rotatably arranged on the mounting plate 62. The bottom ends of a plurality of adjustment bolts 8 are threadedly connected to the base 7. In order to achieve the function of fine adjustment, the bottom ends of the adjustment bolts 8 are connected to the base 7 through rubber sleeves, so that the relative angle between the adjustment bolts 8 and the base 7 can change. In this way, by rotating the corresponding adjustment bolts 8, the angle between the mounting plate 62 and the horizontal plane can be adjusted to achieve the effect of adjusting the angle of the parabolic mirror 2. And to maintain stability, the adjustment assembly further includes a plurality of top bolts 9. The bottom end of the top bolt 9 is hemispherical. A plurality of limit seats 71 are arranged on the base 7. A spherical groove is formed at the top end of the limit seat 71. The bottom end of the top bolt 9 is arranged at the spherical groove. The top end of the top bolt 9 is threadedly connected to the mounting plate 62. In this way, the top bolts 9 and the adjustment bolts 8 correspond one by one. When adjusting the adjustment bolts 8, rotate the corresponding top bolts 9 to make the top bolts 9 play a role of jacking up, while the adjustment bolts 8 play a role of pressing down, maintaining the stability of the mounting seat 6. In this embodiment, two adjustment bolts 8 and two top bolts 9 are arranged on the front side of the mirror base 1, and one adjustment bolt 8 and one top bolt 9 are arranged on the rear side of the mirror base 1.

[0038] The working principle of the utility model is as follows: the parabolic mirror 2 is fixed in the parabolic mirror groove 11 by matching the annular pressing ring 3 with the step groove 21 on the ring side of the parabolic mirror 2, so that the parabolic mirror 2 is subjected to uniform force and the influence on the parabolic mirror surface is reduced.

[0039] The above are only preferred embodiments of the present application, and the present invention is not limited to the above embodiments. It is understood that other improvements and changes directly derived or associated by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included in the protection scope of the present invention.

Claims

1. A support structure for a high-precision off-axis parabolic mirror, characterized in that: include: A support and a mirror seat (1) arranged on the support, wherein a parabolic mirror groove (11) is provided on one side of the mirror seat (1), a parabolic mirror (2) is arranged in the parabolic mirror groove (11), an annular pressing ring (3) is provided at the opening of the parabolic mirror groove (11) of the mirror seat (1), a step groove (21) is provided on the mirror ring side of the parabolic mirror (2), and the inner side of the pressing ring (3) is clamped in the step groove (21).

2. The high-precision off-axis parabolic mirror support structure according to claim 1, characterized in that: The mirror seat (1) is evenly provided with a plurality of glue grooves (12) on the ring side of the parabolic mirror groove (11).

3. The high-precision off-axis parabolic mirror support structure according to claim 2, characterized in that: The mirror seat (1) is provided with a glue injection hole (13) at the glue groove (12) which penetrates the groove wall of the parabolic mirror groove (11).

4. The high-precision off-axis parabolic mirror support structure according to claim 2, characterized in that: The glue groove (12) is in a strip shape.

5. The high-precision off-axis parabolic mirror support structure according to claim 1, characterized in that: A spacer ring (4) and a felt ring (5) are arranged in sequence between the pressure ring (3) and the parabolic mirror (2).

6. The high-precision off-axis parabolic mirror support structure according to claim 5, characterized in that: The pressure ring (3) is fixed on the mirror base (1) by means of mounting bolts.

7. The high-precision off-axis parabolic mirror support structure according to claim 1, characterized in that: The support comprises a base (7), a mounting seat (6) and an adjustment assembly; the mounting seat (6) is arranged on the base (7) via the adjustment assembly; the mounting seat (6) is provided with a plurality of circumferentially distributed annular waist grooves (61); and the mirror seat (1) is arranged on the mounting seat (6) via the plurality of annular waist grooves (61).

8. The high-precision off-axis parabolic mirror support structure according to claim 7, characterized in that: The adjustment assembly comprises a plurality of adjustment bolts (8), a mounting plate (62) is arranged at the bottom end of the mounting seat (6), the top ends of the plurality of adjustment bolts (8) are rotatably arranged on the mounting plate (62), and the bottom ends of the plurality of adjustment bolts (8) are threadedly connected to the base (7).

9. The high-precision off-axis parabolic mirror support structure according to claim 8, characterized in that: The adjustment assembly also includes a plurality of upper bolts (9), the bottom ends of the upper bolts (9) are hemispherical, a plurality of limit seats (71) are provided on the base (7), a ball groove is provided at the top end of the limit seat (71), the bottom ends of the upper bolts (9) are arranged in the ball groove, and the top ends of the upper bolts (9) are threadedly connected to the mounting plate (62).

10. The high-precision off-axis parabolic mirror support structure according to claim 7, characterized in that: The mounting seat (6) is provided with a plurality of support rods (63) at the bottom of the mirror seat (1).

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