Four-camera dome-screen starry sky shooting support and four-camera system

Abstract

The utility model discloses a four-camera dome-screen starry sky shooting support and a four-camera system, belongs to the technical field of optical equipment, and aims to solve the problem that a conventional full-frame camera cannot shoot live-action day and night alternating pictures and starry sky pictures with resolution greater than 8K * 8K. The four-camera dome-screen starry sky shooting support comprises a chassis (1), the chassis (1) is connected with a top camera frame (2) and three side peripheral camera frames (3), a top camera (4) can be mounted on the top camera frame (2), and side peripheral cameras (5) are mounted on the three side peripheral camera frames (3). The shooting resolution of the four-camera spherical screen starry sky shooting support and the four-camera system at least can reach 8K * 8K, the signal-to-noise ratio is high, the four-camera spherical screen starry sky shooting support and the four-camera system are suitable for shooting live-action day and night alternating pictures and starry sky pictures of a spherical screen of a planetarium, the maximum resolution can reach 12K * 12K according to different pixel densities of the selected cameras, and the shooting efficiency is high. Therefore, future possible resolution upgrade of the dome screen playing device can be handled.

Description

Technical Field

[0001] The utility model relates to the technical field of optical equipment, specifically a four-camera spherical screen starry sky shooting bracket and a four-camera system. Background Art

[0002] At present, the widely used full-frame cameras and corresponding circular fish-eye lenses cannot meet the resolution of 8K×8K. The current highest-pixel full-frame cameras can only reach a resolution of 6K×6K. Moreover, the selection of full-frame circular fish-eye lenses is greatly restricted. Most of them do not have an aperture value of f2.8 or below, and it is impossible to obtain a high signal-to-noise ratio image. And the image quality of the vast majority is not good at the corners, which is a great disadvantage for showing real point light sources such as stars. Considering the above two points, although using circular fish-eye lenses can meet the shooting requirements of spherical screen materials for many daytime scenes, it is not very suitable for the special subject of the starry sky.

[0003] In addition, the viewing angle of fish-eye lenses can mostly not break through a circle of 180 degrees (i.e., a hemisphere). The configurations of current planetariums are diverse. Some older planetariums are horizontal hemispheres, while most of the newly built planetariums in recent years are hemispheres with a certain inclination angle, and the inclination angle is mostly 20 degrees to 23 degrees. Therefore, the viewing angle of the captured materials needs to be greater than a circle of 180 degrees, for example, reaching a viewing angle of 220 degrees, in order to flexibly adapt to the current horizontal and inclined planetariums. Summary of the Utility Model

[0004] In order to solve the problem that a single full-frame camera cannot capture the real scene day-night alternation and starry sky images of a planetarium spherical screen with a resolution greater than 8K×8K, the utility model provides a four-camera spherical screen starry sky shooting bracket and a four-camera system. The shooting resolution of the four-camera spherical screen starry sky shooting bracket and the four-camera system can reach at least 8K×8K and high signal-to-noise ratio, and is suitable for shooting the real scene day-night alternation and starry sky images of a planetarium spherical screen. And according to the different pixel densities of the selected cameras, the maximum resolution can reach 12K×12K to cope with the possible resolution upgrade of future spherical screen playback devices.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A four-camera spherical sky shooting bracket, comprising a chassis, the chassis is connected with a top camera bracket and three side peripheral camera brackets, the three side peripheral camera brackets are evenly spaced along the circumference of the chassis. When a top camera is installed on the top camera bracket and side peripheral cameras are installed on all three side peripheral camera brackets, the shooting directions of the top camera and the side peripheral cameras are all upward, the top camera is located above the three side peripheral cameras, the optical axis of the lens of the top camera is parallel to the up-down direction, and the optical axes of the lenses of the three side peripheral cameras are evenly spaced along the circumference of the optical axis of the lens of the top camera, and the angles between the optical axes of the lenses of the three side peripheral cameras and the horizontal plane are all 10°-30°.

[0007] The chassis is a circular plate-like structure, the chassis is parallel to the horizontal plane, a top bracket installation groove and a side bracket installation groove are provided on the upper surface of the chassis, the top camera bracket is fixedly connected and matched with the top bracket installation groove, and the side peripheral camera brackets are fixedly connected and matched with the side bracket installation grooves one by one.

[0008] Three top bracket installation grooves and three side bracket installation grooves are provided on the upper surface of the chassis, and the top bracket installation grooves and the side bracket installation grooves are evenly and alternately arranged along the circumference of the chassis.

[0009] The inner ends of the top bracket installation groove and the side bracket installation groove are both at the center of the chassis, and the inner ends of the three top bracket installation grooves and the side bracket installation grooves are communicated.

[0010] The top camera bracket includes a top camera seat and a top connecting plate connected in sequence. The cross-section of the top camera seat is concave-shaped, and the bottom of the top camera can be fixedly connected and matched with the top camera seat; when the top camera is installed on the top camera bracket, the optical axis of the lens of the top camera coincides with the axis of the chassis.

[0011] The top connecting plate is in an L-shaped structure, the top connecting plate includes a vertical section and a horizontal section connected in sequence, the top camera seat is fixed to the upper part of the vertical section, and the inner end of the horizontal section is fixedly connected and matched with the top bracket installation groove.

[0012] The side peripheral camera bracket includes a side peripheral camera seat and a side peripheral connecting plate connected in sequence. The side peripheral camera seat includes a side peripheral camera seat body and a cushion block connected up and down. The cross-section of the side peripheral camera seat body is concave-shaped, and the bottom of the side peripheral camera can be fixedly connected and matched with the side peripheral camera seat body; when the top camera is installed on the top camera bracket and side peripheral cameras are installed on all three side peripheral camera brackets, the distance between the lens entrance pupil of the side peripheral camera and the lens entrance pupil of the top camera is 25 cm - 35 cm.

[0013] The side peripheral connecting plate extends along the diameter direction of the chassis, the side peripheral camera seat is fixed to the upper surface of the outer end of the side peripheral connecting plate, and the inner end of the side peripheral connecting plate is fixedly connected and matched with the side bracket installation groove.

[0014] The four-camera spherical screen starry sky shooting bracket further includes a bottom box, a control unit, a first signal transceiver unit, and a second signal transceiver unit. The chassis and the bottom box are connected up and down. The control unit, the first signal transceiver unit, and the second signal transceiver unit are all located in the bottom box. The image information captured by the top camera and the peripheral cameras can be sent to the control unit through the first signal transceiver unit, and the control unit can send out the received image information through the second signal transceiver unit.

[0015] A four-camera system includes a top camera, three peripheral cameras, and the above-mentioned four-camera spherical screen starry sky shooting bracket. The top camera is fixed on the top camera mount, and the three peripheral cameras are respectively and correspondingly fixed on the three peripheral camera mounts.

[0016] The beneficial effects of the present utility model are as follows: The shooting resolution of the four-camera spherical screen starry sky shooting bracket and the four-camera system can reach at least 8K×8K and have a high signal-to-noise ratio. It is suitable for shooting the real scene day-night alternation pictures and starry sky pictures of the spherical screen in the planetarium. And according to the different pixel densities of the selected cameras, the maximum resolution can reach 12K×12K to cope with the possible resolution upgrade of future spherical screen playback devices. Description of the Drawings

[0017] The specification drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0018] Figure 1 It is a three-dimensional schematic diagram of the four-camera spherical screen starry sky shooting bracket of the present utility model.

[0019] Figure 2 It is a schematic diagram of the chassis.

[0020] Figure 3 It is a schematic diagram of the peripheral camera seat.

[0021] Figure 4 It is a front view schematic diagram of the four-camera system of the present utility model.

[0022] Figure 5 It is a three-dimensional schematic diagram of the four-camera system of the present utility model.

[0023] Figure 6 It is a partial schematic diagram of the four-camera system of the present utility model.

[0024] Figure 7 It is a schematic diagram of the engineering process of the four-camera system of the present utility model.

[0025] Figure 8 It is a schematic diagram of the circuit connection of the four-camera system of the present utility model.

[0026] Description of the reference numerals in the drawings:

[0027] 1. Chassis; 2. Top camera mount; 3. Peripheral camera mount; 4. Top camera; 5. Peripheral camera; 6. Bottom box; 7. Intelligent terminal;

[0028] 11. Top frame mounting groove; 12. Side frame mounting groove;

[0029] 21. Top camera base; 22. Top connecting plate;

[0030] 31. Peripheral camera base; 32. Peripheral connecting plate;

[0031] 61. Control unit; 62. First signal transceiver unit; 63. Second signal transceiver unit;

[0032] 221. Vertical section; 222. Horizontal section;

[0033] 311. Peripheral camera base body; 312. Spacer block. Detailed implementation manners

[0034] It should be noted that, without conflict, the embodiments and the features in the embodiments in the present application may be combined with each other. The following will describe the present invention in detail with reference to the drawings and in combination with the embodiments.

[0035] For the convenience of understanding and description, an absolute positional relationship is adopted in the following description of the present invention. Without special explanation, the orientation word "up" represents Figure 4 the upper side direction in Figure 4 the orientation word "down" represents Figure 4 the lower side direction in Figure 4 the orientation word "left" represents Figure 4 the left side direction in Figure 4 the orientation word "right" represents

[0036] such as Figures 1 to 6As shown in the figure, a four-camera spherical sky shooting bracket according to an embodiment of the present utility model includes a chassis 1. The chassis 1 is connected with a top camera bracket 2 and three side peripheral camera brackets 3. The three side peripheral camera brackets 3 are evenly spaced along the circumference of the chassis 1. When a top camera 4 is installed on one top camera bracket 2 and a side peripheral camera 5 is installed on each of the three side peripheral camera brackets 3, the shooting directions of the top camera 4 and the side peripheral cameras 5 are both upward. The top camera 4 is located above the three side peripheral cameras 5. The optical axis of the lens of the top camera 4 is parallel to the up-down direction. The optical axes of the lenses of the three side peripheral cameras 5 are evenly spaced along the circumference of the optical axis of the lens of the top camera 4. The angles between the optical axes of the lenses of the three side peripheral cameras 5 and the horizontal plane are all 10°-30° (for example, 25°).

[0037] The chassis 1 is a circular plate-like structure. The chassis 1 is parallel to the horizontal plane. The axis of the chassis 1 is parallel to the up-down direction. A top bracket mounting groove 11 and a side bracket mounting groove 12 are provided on the upper surface of the chassis 1. The top camera bracket 2 and the side peripheral camera brackets 3 are both detachably connected to the chassis 1 (such as screw connection). The top camera bracket 2 is fixedly connected to the top bracket mounting groove 11 in a matching manner, and the side peripheral camera brackets 3 are fixedly connected to the side bracket mounting grooves 12 in a one-to-one corresponding and matching manner.

[0038] As Figure 1 shown in the figure, three top bracket mounting grooves 11 and three side bracket mounting grooves 12 are provided on the upper surface of the chassis 1. The three side peripheral camera brackets 3 are fixedly connected to the three side bracket mounting grooves 12 in a one-to-one corresponding and matching manner. One top camera bracket 2 is fixedly connected to any one of the three top bracket mounting grooves 11. The top bracket mounting grooves 11 and the side bracket mounting grooves 12 are evenly and alternately arranged along the circumference of the chassis 1.

[0039] Both the top bracket mounting groove 11 and the side bracket mounting groove 12 extend along the diameter direction of the chassis 1. The inner ends of the top bracket mounting groove 11 and the side bracket mounting groove 12 are both at the center of the chassis 1. The inner ends of the three top bracket mounting grooves 11 and the side bracket mounting grooves 12 are connected.

[0040] The top camera bracket 2 includes a top camera base 21 and a top connecting plate 22 connected in sequence. The top camera base 21 and the top connecting plate 22 are detachably connected (such as screw connection). The cross-section of the top camera base 21 is concave-shaped. The opening of the top camera base 21 faces the axis of the chassis 1. The bottom of the top camera 4 can be fixedly connected to the top camera base 21 in a matching manner; when the top camera 4 is installed on the top camera bracket 2, the optical axis of the lens of the top camera 4 coincides with the axis of the chassis 1.

[0041] As Figures 1 to 3As shown, the top connecting plate 22 has an L-shaped structure. The top connecting plate 22 includes a vertical section 221 and a horizontal section 222 connected in sequence. The vertical section 221 extends in the up and down direction, and the horizontal section 222 extends in the diameter direction of the chassis 1. The top camera mount 21 is fixed to the upper part of the vertical section 221. The top camera mount 21 is stacked and connected with the vertical section 221. The inner end of the horizontal section 222 is fixedly connected in a matching manner with the top frame mounting groove 11. The lower end of the vertical section 221 is connected to the outer end of the horizontal section 222.

[0042] The side peripheral camera frame 3 includes a side peripheral camera mount 31 and a side peripheral connecting plate 32 connected in sequence. The side peripheral camera mount 31 includes a side peripheral camera mount body 311 and a spacer 312 connected up and down. The side peripheral camera mount body 311 and the spacer 312 are connected as a whole. The cross-section of the side peripheral camera mount body 311 is concave-shaped, and the opening of the side peripheral camera mount body 311 faces upward. The bottom of the side peripheral camera 5 can be fixedly connected in a matching manner with the side peripheral camera mount body 311.

[0043] As Figures 1 to 6 shown, when the top camera 4 is installed on the top camera frame 2 and the side peripheral cameras 5 are installed on all three side peripheral camera frames 3, the optical axis of the lens of the side peripheral camera 5 can intersect with the optical axis of the lens of the top camera 4, or the optical axis of the lens of the side peripheral camera 5 can deviate from the optical axis of the lens of the top camera 4. Preferably, the optical axis of the lens of the side peripheral camera 5 can deviate from the optical axis of the lens of the top camera 4. The distance between the lens entrance pupil of the side peripheral camera 5 and the lens entrance pupil of the top camera 4 can be 25 cm - 35 cm, for example, about 30 cm.

[0044] The side peripheral connecting plate 32 extends in the diameter direction of the chassis 1. The included angle between two adjacent side peripheral connecting plates 32 is 120°. The side peripheral camera mount 31 is fixed to the upper surface of the outer end of the side peripheral connecting plate 32. The side peripheral camera mount 31 and the side peripheral connecting plate 32 are detachably connected (such as screw connection). The inner end of the side peripheral connecting plate 32 is fixedly connected in a matching manner with the side frame mounting groove 12.

[0045] The four-camera spherical screen starry sky shooting bracket further includes a bottom box 6, a control unit 61, a first signal transceiver unit 62, and a second signal transceiver unit 63. The chassis 1 and the bottom box 6 are connected up and down. The control unit 61, the first signal transceiver unit 62, and the second signal transceiver unit 63 are all located in the bottom box 6.

[0046] As Figure 8As shown in the figure, the image information captured by the top camera 4 and the peripheral cameras 5 can be sent to the control unit 61 through the first signal transceiver unit 62. The control unit 61 can send control signals to the top camera 4 and the peripheral cameras 5 through the first signal transceiver unit 62. The control unit 61 can send the received image information to the intelligent terminal 7 (such as a mobile phone or a computer) through the second signal transceiver unit 63. The intelligent terminal 7 can send control signals to the control unit 61 through the second signal transceiver unit 63.

[0047] The signal connections between the control unit 61, the first signal transceiver unit 62, and the second signal transceiver unit 63 can be wired connections. The signal connections between the first signal transceiver unit 62 and the top camera 4 and the peripheral cameras 5 can be wired connections or wireless connections (such as WIFI or Bluetooth). The signal connections between the second signal transceiver unit 63 and the intelligent terminal 7 can be wired connections or wireless connections (such as WIFI or Bluetooth).

[0048] The four-camera spherical dome starry sky shooting bracket may further include a storage unit and a power supply unit. The control unit 61 can store the received image information in the storage unit. The power supply unit can supply power to the top camera 4, the peripheral cameras 5, the control unit 61, the first signal transceiver unit 62, the second signal transceiver unit 63, and the storage unit, etc. The power supply unit can use dry batteries or an external power supply.

[0049] Next, a four-camera system is received. The four-camera system includes a top camera 4, three peripheral cameras 5, and the above-mentioned four-camera spherical dome starry sky shooting bracket. The top camera frame 2 is fixed to the top camera frame 2. The three peripheral cameras 5 are fixedly arranged on the three peripheral camera frames 3 one by one. The top camera 4 is located above the three peripheral cameras 5. The distance between the top camera 4 and the peripheral cameras 5 can be 15 cm - 30 cm.

[0050] The shooting directions of the top camera 4 and the peripheral cameras 5 both face upward. For example, the shooting direction of the top camera 4 is vertically upward, while the shooting direction of the peripheral cameras 5 is obliquely upward. The optical axis of the lens of the top camera 4 is parallel to the up and down direction. The optical axes of the lenses of the three peripheral cameras 5 are evenly spaced along the circumferential direction of the optical axis of the lens of the top camera 4. The angles between the optical axes of the lenses of the three peripheral cameras 5 and the horizontal plane are all 25°. Both the top camera 4 and the peripheral cameras 5 can use existing full-frame cameras.

[0051] In the prior art, the zenith picture of the four vertically arranged cameras is stitched out by the edge part of the lens. Setting a camera directly facing the zenith (i.e., the top camera 4) can greatly improve the picture quality near the zenith because the zenith is a crucial picture area in the planetarium.

[0052] The control unit 61 includes a control system that can achieve unified exposure for the multi-camera day-night alternating images, thus reducing the difficulty of post-processing. The control system can control a top camera 4 and three peripheral cameras 5 to shoot synchronously, and then stitch the four captured images together to obtain a high signal-to-noise ratio live day-night alternating image and starry sky image suitable for the dome screen of the planetarium with a resolution of at least 8K×8K. And depending on the pixel density of the selected cameras, the maximum resolution can reach 12K×12K to cope with the possible future resolution upgrade of the dome screen playback device. In addition, the current configurations of planetariums vary, especially those newly built in recent years often have a certain inclination angle. The four-camera system can shoot time-lapse videos with a viewing angle greater than 220 degrees, and can flexibly adapt to the current horizontal and inclined planetariums. The four-camera system can also perform unified dynamic parameter adjustment and shooting control on multiple cameras and achieve remote operation to avoid the camera operators from being in the shot.

[0053] When the diagonal field of view of a single camera (the top camera 4 or the peripheral camera 5) is greater than 180 degrees, the full coverage of the sky hemisphere can be achieved. The bases of the fixed cameras (the top camera base 21 and the peripheral camera base 31) can be designed separately for the cameras to increase the contact area with the cameras and enhance stability. For example, the top camera 4 or the peripheral camera 5 uses Canon EOS R3, and the base is designed for Canon EOS R3. The base and the camera are connected and fastened using 1 / 4”×20UNC screws to the tripod screw holes at the bottom of the camera. The base has an inclination angle of 25 degrees, providing a 25-degree line-of-sight elevation angle for the camera. The three peripheral camera bases 31 are connected to the central circular chassis 1 through three peripheral connecting plates 32 and fastened with screws. There is also a vertically protruding top connecting plate 22, which is connected to the circular chassis 1 and the top camera base 21, and the top camera base 21 mounts the top camera 4 facing vertically upward. The chassis 1 or the bottom box 6 can be connected to a mainstream tripod through 3 / 8”×16UNC screws.

[0054] Via the camera interface provided by the camera manufacturer (which may be WiFi, USB, Ethernet port, etc.), the operating system and control program embedded in the microcomputer motherboard can control the parameters and shooting of the camera and provide a user-friendly Web interface. The user can connect to the system via WiFi to remotely control the camera, modify the camera parameters, and provide accurate time and positioning information to the shooting control system. After obtaining the accurate time and positioning information, the program automatically calculates the EV value required for the current exposure and synchronizes it to the camera. Or according to the actual shooting requirements, specify independent parameter control logic for each camera.

[0055] The working process of the four-camera spherical sky shooting bracket (which can be called a four-camera shooting bracket for shooting spherical sky) and the four-camera system (which can be called a four-camera system for shooting spherical sky) is introduced below, as Figure 7 shown.

[0056] Use M4 screws to install and fasten all detachable parts in a preset manner to assemble the four-camera spherical sky shooting bracket.

[0057] Install the top camera 4 and the peripheral cameras 5 to the four-camera spherical sky shooting bracket using 1 / 4-inch screws. In this example, both the top camera 4 and the peripheral cameras 5 use Canon EOS R3 cameras. And use RJ-45 Ethernet cables to connect the cameras to the control unit.

[0058] Use a mobile phone to connect to the WiFi hotspot of the controller, log in to the web page to set the total shooting duration, and start shooting.

[0059] The control unit executes the shooting task of the time-lapse video according to the aforementioned algorithm logic.

[0060] Thus, time-lapse video materials of the starry sky with a resolution of 8K×8K and a viewing angle of not less than 220 degrees applicable to a high-resolution spherical planetarium can be shot.

[0061] As described above, only the specific embodiments of the present utility model are provided, and the scope of implementation of the utility model cannot be limited by them. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the protection scope of the present utility model, should still fall within the scope covered by the present utility model. In addition, the technical features in the present utility model can be freely combined with each other, as well as between technical features, technical features and technical solutions, and technical solutions and technical solutions.

Claims

1. A four-camera dome starry sky shooting bracket, characterized in that: The four-camera spherical screen starry sky shooting bracket comprises a chassis (1), the chassis (1) is connected to a top camera frame (2) and three side camera frames (3), the three side camera frames (3) are evenly spaced along the circumference of the chassis (1), when a top camera (4) is installed on the top camera frame (2) and side cameras (5) are installed on the three side camera frames (3), the shooting directions of the top camera (4) and the side cameras (5) are both upward, the top camera (4) is located above the three side cameras (5), the lens optical axis of the top camera (4) is parallel to the up and down direction, the lens optical axes of the three side cameras (5) are evenly spaced along the circumference of the lens optical axis of the top camera (4), and the angles between the lens optical axes of the three side cameras (5) and the horizontal plane are all 10°-30°.

2. The four-camera spherical screen starry sky shooting bracket according to claim 1, characterized in that: The chassis (1) is a circular plate-shaped structure. The chassis (1) is parallel to a horizontal plane. A top frame mounting groove (11) and a side frame mounting groove (12) are provided on the upper surface of the chassis (1). The top camera frame (2) is matched, connected and fixed to the top frame mounting groove (11). The side camera frame (3) is matched, connected and fixed to the side frame mounting groove (12) in a one-to-one correspondence.

3. The four-camera spherical screen starry sky shooting bracket according to claim 2, characterized in that: The upper surface of the chassis (1) is provided with three top frame mounting grooves (11) and three side frame mounting grooves (12), and the top frame mounting grooves (11) and the side frame mounting grooves (12) are evenly and alternately arranged along the circumference of the chassis (1).

4. The four-camera spherical screen starry sky shooting bracket according to claim 3, characterized in that: The inner ends of the top frame mounting groove (11) and the inner ends of the side frame mounting groove (12) are both located at the center of the chassis (1), and the inner ends of the three top frame mounting grooves (11) and the inner ends of the side frame mounting grooves (12) are connected.

5. The four-camera spherical screen starry sky shooting bracket according to claim 2, characterized in that: The top camera frame (2) comprises a top camera seat (21) and a top connecting plate (22) which are connected in sequence. The cross section of the top camera seat (21) is in the shape of a concave character. The bottom of the top camera (4) can be matched with the top camera seat (21) for connection and fixation. When the top camera (4) is installed on the top camera frame (2), the optical axis of the lens of the top camera (4) coincides with the axis of the chassis (1).

6. The four-camera spherical screen starry sky shooting bracket according to claim 5, characterized in that: The top connecting plate (22) is in an L-shaped structure. The top connecting plate (22) includes a vertical section (221) and a horizontal section (222) connected in sequence. The top camera seat (21) is fixed to the upper part of the vertical section (221). The inner end of the horizontal section (222) is matched and connected to the top frame mounting groove (11).

7. The four-camera spherical screen starry sky shooting bracket according to claim 2, characterized in that: The side circumference camera frame (3) comprises a side circumference camera seat (31) and a side circumference connecting plate (32) connected in sequence, the side circumference camera seat (31) comprises a side circumference camera seat body (311) and a cushion block (312) connected up and down, the cross section of the side circumference camera seat body (311) is in the shape of a concave character, and the bottom of the side circumference camera (5) can be matched, connected and fixed with the side circumference camera seat body (311); when the top camera (4) is installed on the top camera frame (2) and the side circumference cameras (5) are installed on the three side circumference camera frames (3), the distance between the lens entrance pupil of the side circumference camera (5) and the lens entrance pupil of the top camera (4) is 25 cm-35 cm.

8. The four-camera spherical screen starry sky shooting bracket according to claim 7, characterized in that: The side peripheral connecting plate (32) extends along the diameter direction of the chassis (1), the side peripheral camera seat (31) is fixed to the upper surface of the outer end of the side peripheral connecting plate (32), and the inner end of the side peripheral connecting plate (32) is matched, connected and fixed with the side frame mounting groove (12).

9. The four-camera spherical screen starry sky shooting bracket according to claim 1, characterized in that: The four-camera spherical screen starry sky shooting bracket also includes a bottom box (6), a control unit (61), a first signal transceiver unit (62) and a second signal transceiver unit (63); the chassis (1) and the bottom box (6) are connected vertically; the control unit (61), the first signal transceiver unit (62) and the second signal transceiver unit (63) are all located in the bottom box (6); image information captured by the top camera (4) and the side camera (5) can be sent to the control unit (61) through the first signal transceiver unit (62); and the control unit (61) can send the received image information through the second signal transceiver unit (63).

10. A four-camera system, characterized in that: The four-camera system comprises a top camera (4), three side cameras (5) and the four-camera spherical screen starry sky shooting bracket described in claim 1, wherein the top camera frame (2) is fixed on the top camera frame (2), and the three side cameras (5) are fixed on the three side camera frames (3) in a one-to-one correspondence.

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