Deformable mirror

Abstract

A deformable mirror comprises a deformable mirror surface, a connecting column, a base, an adjusting piece and a power source. A blind hole array with internal threads is arranged in the base, a hole bottom diaphragm is formed at the bottom of each blind hole, the deformable mirror surface is connected with the hole bottom diaphragms through a plurality of connecting columns, the connecting columns and the blind hole array are coaxially arranged in a one-to-one correspondence mode, an adjusting piece is screwed in each blind hole in the blind hole array, rotation of each adjusting piece is controlled by a corresponding power source, and the deformable mirror surface is connected with the corresponding power source. The adjusting piece is configured to be controlled by the power source to change the axial displacement of the hole bottom diaphragm, and the deformable mirror surface is slightly deformed through the connecting column. Deformation of the mirror surface is adjusted through the adjusting piece, the position can be kept after power failure, the surface shape of the mirror surface is not changed, the deformable mirror is kept still due to the friction influence of the adjusting piece after power failure, and the surface shape of the mirror surface can be kept in the state before power failure.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical devices, and in particular relates to a deformable mirror. Background Art

[0002] The deformable mirror is one of the core components of the adaptive optical system. Its main function is to generate the required surface shape of the system in real time and in a controlled manner to correct the distorted wavefront. Currently, the deformable mirrors mainly include piezoelectric-driven deformable mirrors, electrostatic-driven deformable mirrors and electromagnetic-driven deformable mirrors. However, these deformable mirrors cannot maintain their surface shape when the power is off, which cannot meet the zoom requirements of the optical imaging system and is not conducive to application. Utility Model Content

[0003] The utility model provides a deformable mirror to overcome the existing technology and adjust the deformation of the mirror surface through a mechanical transmission method.

[0004] A deformable mirror comprises a deformable mirror surface, a connecting column, a base, an adjusting member and a power source; a blind hole array with internal threads is arranged in the base, a hole bottom diaphragm is formed at the bottom of the blind hole, the deformable mirror surface is connected to the hole bottom diaphragm through a plurality of connecting columns, the plurality of connecting columns are coaxially arranged in a one-to-one correspondence with the blind hole array, each blind hole in the blind hole array is screwed with an adjusting member, the rotation of each adjusting member is controlled by the corresponding power source, the adjusting member is configured to be controlled by the power source to change the axial displacement of the hole bottom diaphragm, and the deformable mirror surface is slightly deformed through the connecting column.

[0005] Furthermore, the adjusting member comprises a top, a body and a tail; the top, the body and the tail are connected as a whole by a coaxial axis, and the outer peripheral surface of the body is processed with an external thread, and the external thread is connected to the internal thread of the blind hole.

[0006] Compared with the prior art, the utility model has the following beneficial effects:

[0007] The present application adjusts the deformation of the mirror surface by means of an adjusting member, and can maintain the position after power failure, so that the mirror surface shape remains unchanged. After power failure, the deformable mirror remains stationary due to the friction of the adjusting member, so that the mirror surface shape can maintain the state before power failure.

[0008] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and embodiments: BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the structure of the deformable mirror of this application;

[0010] Figure 2 This is a schematic diagram of the structure of the base of this application;

[0011] Figure 3 This is a schematic diagram of the structure of the adjusting bolt for this application;

[0012] Figure 4 A schematic diagram of the initial mirror deformation of the deformable mirror of the present application;

[0013] Figure 5 This is a schematic diagram of the principle of deforming the mirror surface by adjusting the bolts of the deformable mirror in this application.

[0014] The reference numerals are as follows:

[0015] 1. Deformable mirror; 2. Connecting column;

[0016] 3. base, 31. base, 32. blind hole;

[0017] 4. adjusting member, 41. top, 42. tail, 43. body;

[0018] 5. Coupling;

[0019] 6. Motor seat, 7. Motor. DETAILED DESCRIPTION

[0020] The following is a detailed description of the embodiments of the technical solution of the utility model in conjunction with the accompanying drawings. Unless otherwise specified, the technical terms or scientific terms used in this application should be the common meanings understood by those skilled in the art to which the utility model belongs.

[0021] Figure 1 A deformable mirror is shown, which includes a deformable mirror surface 1, a connecting column 2, a base 3, an adjusting member 4 and a power source; the base 3 is provided with a blind hole array with internal threads, and a hole bottom diaphragm is formed at the bottom of the blind hole. The deformable mirror surface 1 is connected to the hole bottom diaphragm through a plurality of connecting columns 2, and the plurality of connecting columns 2 are coaxially arranged in a one-to-one correspondence with the blind hole array. Each blind hole in the blind hole array is screwed with an adjusting member 4, and the rotation of each adjusting member 4 is controlled by the corresponding power source. The adjusting member 4 is configured to be controlled by the power source to change the axial displacement of the hole bottom diaphragm, so that the deformable mirror surface 1 is slightly deformed through the connecting column 2.

[0022] The adjusting member 4 is controlled to rotate by a power source, thereby making a slight linear motion in the blind hole 42, changing the axial displacement of the diaphragm at the bottom of the hole it contacts, and then causing a slight deformation of the mirror surface 1 through the connecting column 2. The adjustment of the adjusting member array can adjust the deformation of the mirror surface 1 for optical aberration correction.

[0023] Figure 2 A base structure diagram is shown, where the base 3 includes a base 31 and blind holes 32; blind holes 32 are processed in the base 31 to form an array, and a bottom diaphragm is provided at the bottom. In order to increase stability and strength, and to better ensure the deformation of the bottom diaphragm, support arms are provided between adjacent blind hole arrays.

[0024] Figure 3A structural diagram of an adjusting member is shown, wherein the adjusting member 4 comprises a top 41, a body 43 and a tail 44; the top 41, the body 43 and the tail 44 are connected as a whole by a coaxial axis, and the outer peripheral surface of the body 43 is processed with an external thread, and the external thread is connected with the internal thread of the blind hole. It can be understood that the adjusting member 4 is a modified bolt, and in order to ensure the control accuracy, the end of the top 41 that contacts the bottom diaphragm of the hole is a hemispherical head.

[0025] The power source is a motor, the output shaft of the motor 7 is connected to the adjusting member 4, the top 41 is in contact with the bottom diaphragm of the blind hole, the tail 44 is connected to the output shaft of the motor 7 through the coupling 5, and the motor 7 is installed on the motor seat 6. The adjusting member 4 is driven by the rotation of the motor 7 to make a slight movement in the blind hole 32, changing the axial displacement of the bottom diaphragm it contacts, and then causing the deformable mirror 1 to produce a slight deformation through the connecting column 2; the adjustment of the adjusting member array can adjust the deformation of the deformable mirror 1 for optical aberration correction.

[0026] Figure 4 The schematic diagram of the initial deformation of the deformable mirror is shown. Since the deformable mirror surface 1 of the deformable mirror needs to be deformed in both directions, the adjustment member 4 is initially rotated to a half position of the stroke so that the entire bottom diaphragm is convex. The outer surface of the deformable mirror surface 1 is coated with a reflective film.

[0027] Figure 5 The schematic diagram of the deformable mirror deforming the mirror surface by the adjusting member 4 is shown. The deformation of the mirror surface 1 can be adjusted by adjusting the adjusting member 4. The blind hole array is arranged in a triangular, rectangular or annular array.

[0028] In some embodiments, the external thread of the adjusting member 4 is a thread with a lead of 0.25 mm, so the adjusting member 4 can move linearly by 0.07 microns when rotating 0.1 degrees. Therefore, by adjusting the deformation of the deformable mirror 1 by the adjusting member 4, the deformation accuracy of the mirror can be within 0.07 microns.

[0029] The present invention has been disclosed as above with preferred implementation cases, but it is not used to limit the present invention. Any technician familiar with the profession can make slight changes or modifications to equivalent implementation cases with equivalent changes by using the above-disclosed structures and technical contents without departing from the scope of the technical solution of the present invention, which still fall within the scope of the technical solution of the present invention.

Claims

1. A deformable mirror, Features: It comprises a deformable mirror (1), a connecting column (2), a base (3), an adjusting member (4) and a power source; The base (3) is provided with a blind hole array with internal threads, and a hole bottom diaphragm is formed at the bottom of the blind hole. The deformable mirror (1) is connected to the hole bottom diaphragm through a plurality of connecting columns (2). The plurality of connecting columns (2) are coaxially arranged in a one-to-one correspondence with the blind hole array. Each blind hole in the blind hole array is screwed with an adjusting member (4). The rotation of each adjusting member (4) is controlled by a corresponding power source. The adjusting member (4) is configured to be controlled by the power source to change the axial displacement of the hole bottom diaphragm, so that the deformable mirror (1) is slightly deformed through the connecting columns (2).

2. A deformable mirror according to claim 1, Features: The adjusting member (4) comprises a top portion (41), a body (43) and a tail portion (44); the top portion (41), the body (43) and the tail portion (44) are coaxially connected as a whole, and an outer peripheral surface of the body (43) is processed with an external thread, and the external thread is connected to the internal thread of the blind hole.

3. A deformable mirror according to claim 1, Features: The power source is a motor (7), the output shaft of the motor (7) is connected to the adjusting member (4), and the motor (7) is mounted on a motor seat (5).

4. A deformable mirror according to claim 1, Features: The blind hole array is arranged in a triangular, rectangular or circular array.

5. A deformable mirror according to claim 1, Features: The outer surface of the deformable mirror (1) is coated with a reflective film.

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