Wave surface reconstruction system based on multi-view camera

Abstract

The embodiment of the invention provides a wave surface reconstruction system based on a multi-view camera, and the system comprises a fixed pedestal which is provided with an annular guide rail; the reflection main body comprises a plurality of slidable arms which are arranged on the annular guide rail and can slide along the annular guide rail, and a plurality of sections of guide arms which are connected with the slidable arms, and a camera is arranged at one end, far away from the slidable arms, of each section of guide arm; the computer is in signal connection with the plurality of cameras and is used for obtaining a plurality of wave surface images; the wave surface reconstruction algorithm module is used for calculating the wave surface distribution condition of the target area based on the wave surface image obtained by the computer; and each camera arranged on the same group of the slidable arm and the multi-section guide arm can adjust the angle and the distance on a plurality of planes under the action of the corresponding slidable arm and the multi-section guide arm. The cameras are fixed at different positions and are used for shooting wave surface images of a target area.

Description

Technical Field

[0001] The present invention relates to the field of optical imaging technology, and in particular to a wavefront reconstruction system based on multi-cameras. Background Art

[0002] In the process of optical imaging, the propagation of light waves is often disturbed by various factors, such as atmospheric turbulence, mechanical vibration, temperature change, etc. These factors will lead to a decrease in imaging quality, thus affecting the imaging effect. Therefore, in order to improve the quality of optical imaging, it is necessary to monitor and reconstruct the process of light wave propagation. Wavefront reconstruction technology is a technology that can realize the monitoring and reconstruction of light wave propagation.

[0003] At present, the commonly used wavefront reconstruction methods include those based on monocular cameras and interferometry. The monocular camera-based method requires certain modifications to the optical system, such as the installation of a displacement plane, a beam splitter prism, etc., and the reconstruction speed is slow. The interferometry-based method requires the use of special equipment such as laser interferometers, which is costly. Summary of the invention

[0004] In view of the above problems existing in the prior art, an embodiment of the present invention provides a wavefront reconstruction system based on a multi-camera, the system comprising a plurality of cameras, a computer and a wavefront reconstruction algorithm module. The cameras are fixed at different positions and used to capture the wavefront images of the target area. The computer obtains a plurality of wavefront images by connecting the cameras and transmits them to the wavefront reconstruction algorithm module. The wavefront reconstruction algorithm module uses the wavefront images captured by the multi-camera, combined with image processing, numerical calculation and other technologies, to calculate the wavefront distribution of the target area.

[0005] The embodiment of the present invention provides a wavefront reconstruction system based on a multi-camera, comprising:

[0006] A fixed base having an annular guide rail formed thereon;

[0007] A reflective body, comprising a plurality of slidable arms disposed on the annular guide rail and capable of sliding along the annular guide rail, and a multi-section guide arm connected to each slidable arm, each multi-section guide arm being provided with a camera at one end away from the slidable arm;

[0008] A computer, connected to the plurality of camera signals, for obtaining a plurality of wavefront images;

[0009] A wavefront reconstruction algorithm module, which is used to calculate the wavefront distribution of the target area based on the wavefront image obtained by the computer;

[0010] Wherein, each camera arranged on the same set of slidable arms and multi-section guide arms can adjust the angle and distance on multiple planes under the action of the corresponding slidable arms and multi-section guide arms.

[0011] In some embodiments of the present invention, the slidable arm can slide along the annular guide rail within the plane where the upper surface of the fixed base is located to adjust the viewing angle of the camera located at the front end of the multi-section guide arm corresponding to the slidable arm, and the distance between the camera and other cameras.

[0012] In some embodiments of the present invention, each multi-section guide arm includes a transverse long arm, each multi-section guide arm is connected to the corresponding slidable arm through its transverse long arm, and the transverse long arm is arranged along the direction of the slidable arm to which it is connected.

[0013] In some embodiments of the present invention, each multi-section guide arm also includes a vertical rotating shaft and a vertical long arm. The vertical long arm is rotatably connected to the corresponding transverse long arm through the vertical rotating shaft of the multi-section guide arm to which it is located. The vertical rotating shaft is arranged perpendicular to the length direction of the connected transverse long arm so that the connected vertical long arm can rotate vertically relative to the transverse long arm.

[0014] In some embodiments of the present invention, each multi-section guide arm also includes a transverse rotating shaft, and a camera fixing arm rotatably connected to the vertical long arm via the transverse rotating shaft. The transverse rotating shaft is arranged perpendicular to the length direction of the connected vertical long arm so that the connected camera fixing arm can rotate vertically relative to the vertical long arm.

[0015] In some embodiments of the present invention, the fixed base is made of a corrosion-resistant metal plate structure.

[0016] In some embodiments of the present invention, the fixed base can be fixed on a fixed guide rail by a fixing member, and can be moved horizontally along the water tank so as to be able to track and shoot the ship model or other targets.

[0017] In some embodiments of the present invention, the reflective bodies are arranged in three groups, four groups or six groups, and are arranged at equal angles along the circumference of the upper surface of the fixed base.

[0018] Compared with the prior art, the wavefront reconstruction system based on multi-camera provided by the embodiment of the present invention has the beneficial effect that the use of multi-camera can obtain more wavefront images, thereby improving the accuracy and precision of wavefront reconstruction. At the same time, by using image processing and numerical calculation technology, the wavefront can be reconstructed quickly and accurately, realizing the demand for real-time wavefront reconstruction. In addition, the system structure of the present invention is simple, easy to install and maintain, and can be widely used in different occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 An oblique schematic diagram of a wavefront reconstruction system based on a multi-camera provided in an embodiment of the present invention;

[0020] Figure 2A side view schematic diagram of a wavefront reconstruction system based on a multi-camera provided in an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of the operation of an eyepiece camera wavefront reconstruction system in a multi-eyepiece camera-based wavefront reconstruction system provided in an embodiment of the present invention.

[0022] Reference numerals

[0023] 1. Fixed base, 2. Slidable arm, 3. Ultrasonic wave height meter, 4. Horizontal long arm, 5. Vertical rotation axis, 6. Vertical long arm, 7. Horizontal rotation axis, 8. Camera fixed arm, 9. Camera, 10. Control sensor. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0026] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0027] It should also be understood that, although the present application has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present application that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0028] The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

[0029] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present application, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to determine the true intent based on the user's historical operations and to avoid unnecessary or redundant details that make the present application unclear. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but are merely used as the basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any suitable detailed structure.

[0030] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present application.

[0031] The embodiment of the present invention provides a wavefront reconstruction system based on a multi-camera, such as Figures 1 to 3 As shown, including:

[0032] A fixed base 1, on which a circular guide rail is formed;

[0033] A reflective body, comprising a plurality of slidable arms 2 disposed on the annular guide rail and capable of sliding along the annular guide rail, and a multi-section guide arm connected to each slidable arm 2, each multi-section guide arm being provided with a camera 9 at one end away from the slidable arm 2;

[0034] A computer, which is connected to the plurality of cameras 9 by signals, for obtaining a plurality of wavefront images;

[0035] A wavefront reconstruction algorithm module, which is used to calculate the wavefront distribution of the target area based on the wavefront image obtained by the computer;

[0036] Among them, each camera 9 arranged on the same set of slidable arms 2 and multi-section guide arms can adjust the angle and distance on multiple planes under the action of the corresponding slidable arms 2 and multi-section guide arms.

[0037] In this embodiment, the slidable arm 2 can slide along the annular guide rail within the plane where the upper surface of the fixed base 1 is located to adjust the viewing angle of the camera 9 located at the front end of the multi-section guide arm corresponding to the slidable arm 2, as well as the distance between the camera 9 and other cameras 9.

[0038] In this embodiment, each multi-section guide arm includes a transverse long arm 4, each multi-section guide arm is connected to the corresponding slidable arm 2 through its transverse long arm 4, and the transverse long arm 4 is arranged along the direction of the slidable arm 2 to which it is connected.

[0039] In this embodiment, each multi-section guide arm also includes a vertical rotating shaft 5 and a vertical long arm 6. The vertical long arm 6 is rotatably connected to the corresponding transverse long arm 4 through the vertical rotating shaft 5 of the multi-section guide arm to which it is located. The vertical rotating shaft 5 is arranged perpendicular to the length direction of the connected transverse long arm 4 so that the connected vertical long arm 6 can rotate vertically relative to the transverse long arm 4.

[0040] In this embodiment, each multi-section guide arm further includes a transverse rotating shaft 7, and a camera fixing arm 8 rotatably connected to the vertical long arm 6 via the transverse rotating shaft 7, wherein the transverse rotating shaft 7 is arranged perpendicular to the length direction of the connected vertical long arm 6, so that the connected camera fixing arm 8 can be vertically rotated relative to the vertical long arm.

[0041] In order to facilitate the understanding of the above technical solution, the following is a description with reference to the accompanying drawings and specific examples, as follows:

[0042] Reference Figure 1-3The specific implementation methods of the present invention are as follows:

[0043] In the present invention, the multi-eye camera 9 can adopt CCD or CMOS sensors, and the specific number can be determined according to needs.

[0044] The above-mentioned wavefront reconstruction system based on multi-eye camera 9 mainly includes a reflective body composed of a fixed base 1, a slidable arm 2 and a multi-section guide arm, and a camera 9. The fixed base 1 can fix the system body on the water tank guide rail; the slidable arm 2 can enable each camera 9 to adjust a suitable angle on the XY plane, and can adjust the distance between the cameras 9. The vertical rotation axis 5 can enable the camera 9 to adjust a suitable angle on the XZ plane, and can adjust the distance between the cameras 9; the horizontal rotation axis 7 can enable the camera 9 to adjust a suitable angle on the YZ plane, and can adjust the distance between the cameras 9. The system is suitable for changing the angle and distance between multi-eye cameras 9.

[0045] The fixed base 1 is a corrosion-resistant metal plate structure, which can be fixed on the guide rail by bolts and can move horizontally along the water tank. When used in the water tank, the fixed base 1 can be directly placed on the water tank slide rail and can be tracked and photographed along with the ship model. An ultrasonic wave height meter 3 is also provided on the lower surface of the fixed base 1, and a control sensor 10 is also provided on the upper surface of the fixed base 1.

[0046] The four sets of rotatable joint brackets of the rotating guide arm and the annular slide rail sliding arm 2 can satisfy the optical reflector to rotate, lift, pitch and other adjustments at any angle and distance within a certain range to meet various shooting angle requirements.

[0047] During the implementation process, the target area needs to be determined first, and then multiple cameras are fixed at different positions, calibrated and synchronized. Then, the four guide arms can be manipulated by controlling the sensor 10 and adjusted to a suitable angle. Multiple wavefront images are collected and transmitted to a computer. Finally, the wavefront reconstruction algorithm module is used to reconstruct the wavefront to obtain the wavefront distribution of the target area.

[0048] It can be seen from the above technical solution that the wavefront reconstruction system based on the multi-eye camera 9 provided in the above embodiment of the present invention can obtain more wavefront images by using the multi-eye camera 9, thereby improving the accuracy and precision of wavefront reconstruction. At the same time, by using image processing and numerical calculation technology, the wavefront can be reconstructed quickly and accurately to meet the demand for real-time wavefront reconstruction. In addition, the system structure of the present invention is simple, easy to install and maintain, and can be widely used in different occasions.

[0049] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A wavefront reconstruction system based on multi-camera, characterized in that: include: A fixed base having an annular guide rail formed thereon; A reflective body, comprising a plurality of slidable arms disposed on the annular guide rail and capable of sliding along the annular guide rail, and a multi-section guide arm connected to each slidable arm, each multi-section guide arm being provided with a camera at one end away from the slidable arm; A computer, connected to the plurality of camera signals, for obtaining a plurality of wavefront images; A wavefront reconstruction algorithm module, which is used to calculate the wavefront distribution of the target area based on the wavefront image obtained by the computer; Wherein, each camera arranged on the same set of slidable arms and multi-section guide arms can adjust the angle and distance on multiple planes under the action of the corresponding slidable arms and multi-section guide arms.

2. The wavefront reconstruction system based on multi-camera according to claim 1, characterized in that: The slidable arm can slide along the annular guide rail within the plane where the upper surface of the fixed base is located, so as to adjust the viewing angle of the camera arranged at the front end of the multi-section guide arm corresponding to the slidable arm, and the distance between the camera and other cameras.

3. The wavefront reconstruction system based on multi-camera according to claim 2, characterized in that: Each multi-section guide arm comprises a transverse long arm, each multi-section guide arm is connected to a corresponding slidable arm through its transverse long arm, and the transverse long arm is arranged along the direction toward which the slidable arm to which it is connected faces.

4. The wavefront reconstruction system based on multi-camera according to claim 3 is characterized in that: Each multi-section guide arm also includes a vertical rotating shaft and a vertical long arm. The vertical long arm is rotatably connected to the corresponding transverse long arm through the vertical rotating shaft of the multi-section guide arm. The vertical rotating shaft is arranged perpendicular to the length direction of the connected transverse long arm so that the connected vertical long arm can rotate vertically relative to the transverse long arm.

5. The wavefront reconstruction system based on multi-camera according to claim 4, characterized in that: Each multi-section guide arm also includes a transverse rotating shaft and a camera fixing arm rotatably connected to the vertical long arm via the transverse rotating shaft. The transverse rotating shaft is arranged perpendicular to the length direction of the connected vertical long arm so that the connected camera fixing arm can rotate vertically relative to the vertical long arm.

6. The wavefront reconstruction system based on multi-camera according to claim 1, characterized in that: The fixed base adopts a corrosion-resistant metal plate structure.

7. The wavefront reconstruction system based on multi-camera according to claim 1, characterized in that: The fixed base can be fixed on the fixed guide rail through a fixing piece, and can move horizontally along the water tank so as to be able to track and shoot along with the ship model or other targets.

8. The wavefront reconstruction system based on multi-camera according to claim 1, characterized in that: The reflective bodies are arranged in three, four or six groups and are arranged at equal angles along the circumference of the upper surface of the fixed base.

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