JP2009060330A - Imaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an imaging apparatus for preventing a picture imaged by a camera from being distorted in an imaging apparatus of a system for moving a mobile unit having a camera in a movement guide pipe. <P>SOLUTION: The imaging apparatus includes: the movement guide pipe 2; the mobile unit 3; the camera 4; and a pressure supply/exhaust means 5. The imaging apparatus also includes: an inner correction lens 6 provided in front of the lens of the camera inside the movement guide pipe; and an outer correction lens 7 provided in front of the lens of the camera outside the movement guide pipe over the movable range of the mobile unit. The inner correction lens includes: a plane 61 orthogonally crossing the optical axis of the lens 41 of the camera 4; and a curved projecting surface 62 corresponding to a curved inner surface 65 in the movement guide pipe 2 positioned in front of the lens of the camera. The outer correction lens 7 includes: a curved outer surface 68 in the movement guide pipe 2 positioned in front of the lens of the camera; a corresponding curved recessed surface 73; and a plane 71 orthogonally crossing the optical axis of the lens of the camera. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an imaging apparatus that captures an image by moving a movable body including a camera within a moving guide tube.

2. Description of the Related Art Conventionally, a moving body equipped with a camera is installed in a moving guide tube as a monitoring imaging device installed in a tunnel premises or a sports shooting imaging device installed in a sports facility, etc., and fluid supplied into the moving guide tube 2. Description of the Related Art There is known an imaging apparatus that can perform imaging while moving a camera by moving a moving body within a moving guide tube by pressure (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 2005-210682

In the conventional imaging device, the moving guide tube is formed of a tube having a circular cross section, and the surface of the moving guide tube facing the lens of the camera is a curved surface, so that the image captured by the camera is curved and distorted. There was a problem of becoming.
The present invention has been made in view of the conventional problems, and provides an imaging apparatus that prevents an image captured by a camera from becoming a distorted image.

An image pickup apparatus according to the present invention includes a moving guide tube formed in a circular cross section and a moving guide so as to be movable in the moving guide tube along the central axis of the moving guide tube by receiving fluid pressure supplied in the moving guide tube. A moving body provided in the tube, a camera provided on the moving body and imaging the outside of the moving guide tube through a light transmitting portion of the moving guide tube, and pressure supply / discharge means for supplying and discharging fluid pressure to and from the moving guide tube An inner correction lens provided in front of the camera lens inside the moving guide tube, and provided in front of the camera lens outside the moving guide tube across the movable range of the moving body. A curved convex corresponding to a plane perpendicular to the optical axis of the camera lens and a curved inner surface of the moving guide tube positioned in front of the camera lens. Has the door, outer correction lens, characterized in that and a plane perpendicular to the curved outer surface of the moving guide tube located in front of the camera lens and the optical axis of the corresponding curved concave and camera lens.
The inner correction lens is attached to the moving body or the camera and is provided so as to move as the moving body moves.

According to the present invention, since the inner correction lens and the outer correction lens are provided, the image captured by the camera does not become a distorted image, and an image with less distortion can be obtained.
By using the inner correction lens that is attached to the moving body or camera and moves with the movement of the moving body, there is no need to provide an inner correction lens across the movable range of the moving body. The cost of the correction lens can be reduced.

  1 and 2 show an image pickup apparatus according to the best mode of the present invention, FIG. 1 shows a configuration of the image pickup apparatus, and FIG. 2 shows a cross section taken along line AA of FIG.

  As shown in FIG. 1, the imaging apparatus 1 includes a moving guide tube 2, a moving body 3, a camera 4 mounted on the moving body 3, a pressure supply / discharge means 5, an inner correction lens 6, and an outer correction lens. 7.

  The moving guide tube 2 has a tube body 21 having both ends opened in a circular cross section, an end closing member 22 provided to close an opening at one end of the tube body 21, and an opening at the other end of the tube body 21. The other end closing member 23 provided in this manner, the one end side pressure supply port 24 formed in the one end closing member 22, and the other end side pressure supply port 25 formed in the other end closing member 23 are provided. The tube body 21 is formed by a single tube or a connection body of a plurality of tubes. The tubular body 21 extends in a straight line shape or a curved line shape.

  A guide rail 27 is provided on the inner wall 26 of the tube body 21 of the moving guide tube 2 along the tube extending direction. The guide rail 27 is formed by a protrusion or a groove. Inside the tube 21 of the moving guide tube 2, the moving body 3 on which the camera 4 is mounted is installed by the guide rail 27 so as to be movable along the tube extension direction inside the tube 21. .

  The movable body 3 includes a guide rail engaging portion 31 that engages with the guide rail 27 on the outer peripheral surface. The guide rail engaging portion 31 is formed by a groove or protrusion that engages with the guide rail 27 formed by a protrusion or groove. The moving body 3 has a tubular body 21 due to the difference between the pressure received at the one end surface 32 of the moving body 3 near the one end side pressure supply port 24 and the pressure received at the other end surface 33 of the moving body 3 near the other end side pressure supply port 25. It is the structure which moves along the extension direction of a pipe | tube inside.

  The moving guide tube 2 is entirely formed of a light transmissive material, or includes a light transmissive portion 39 formed of a light transmissive material at least in a front portion of the camera 4 in a movable range of the moving body 3. . Therefore, the camera 4 moving in the moving guide tube 2 can image the outside of the moving guide tube 3 through the light transmitting portion 39 of the moving guide tube 2.

  The pressure supply / discharge unit 5 connects, for example, a compressor 51 as a pressure supply device, one end-side pressure supply pipe 52 that connects the compressor 51 and the one-end-side pressure supply port 24, and the compressor 51 and the other-end-side pressure supply port 25. The other end side pressure supply pipe 53, one end side pressure discharge port 54 formed at one end portion of the tube body 21 of the moving guide tube 2, and the other end formed at the other end portion of the tube body 21 of the moving guide tube 3. Side pressure discharge port 55, one end side pressure discharge tube 56 connected to one end side pressure discharge port 54, the other end side pressure discharge tube 57 connected to the other end side pressure discharge port 55, and one end side pressure discharge tube One end side on-off valve 58 provided at 56, the other end side on-off valve 59 provided on the other end side pressure exhaust pipe 57, the pressure for controlling the compressor 51, the one end side on-off valve 58, and the other end side on-off valve 59. A supply / discharge control device 50 is provided.

  The inner correction lens 6 is provided inside the moving guide tube 3 so as to be positioned in front of the lens 41 of the camera 4 mounted on the moving body 3. The inner correction lens 6 is formed by cutting a cylindrical lens having a diameter slightly smaller than the inner diameter of the moving guide tube 2 along the center of the cylinder, and includes a flat surface 61 that is a cut surface and an outer peripheral surface of the cylindrical lens. It is a convex lens provided with the curved convex surface 62 formed of the part. The curved convex surface 62 that connects the one end 63 and the other end 64 of the plane 61 is formed by, for example, a surface that is about ¼ of the outer peripheral surface of the cylindrical lens. Therefore, the curved convex surface 62 and the curved inner surface 65 of the moving guide tube 2 positioned in front of the lens 41 of the camera 4 are formed by a curved surface having the same curvature. The inner correction lens 6 maintains a state in which the plane 61 is orthogonal to the optical axis 42 of the lens 41 of the camera 4 and the curved convex surface 62 faces the curved inner surface 65 of the moving guide tube 2 with a certain slight gap. As described above, it is attached to the moving body 3 and the camera 4 with the attachment 66. Thus, the inner correction lens 6 is provided so as to move as the moving body 3 moves.

  The outer correction lens 7 covers the curved outer surface 68 of the moving guide tube 2 facing the curved convex surface 62 of the inner correction lens 6 within a range in which the inner correction lens 6 moves in the moving guide tube 2. Provided outside. The outer correction lens 7 is positioned parallel to the plane 61 of the inner correction lens 6 and orthogonal to the optical axis 42 of the lens 41 of the camera 4, and a curved concave surface 73 formed on a surface 72 facing the plane 71. Is provided. The outer correction lens 7 has the plane 71 positioned parallel to the plane 61 of the inner correction lens 6, orthogonal to the optical axis 42 of the lens 41 of the camera 4, and facing the curved convex surface 62 of the inner correction lens 6. The curved outer surface 68 and the curved concave surface 73 are fixed to each other in an intimate contact state by an adhesive or a fixture not shown.

  As the power source of the camera 4, a rechargeable power source mounted on the camera 4 or electricity taken from outside through a power supply line (not shown) is used. Video signals and audio signals captured by the camera 4 are transmitted to the outside by wire or wirelessly.

  The operation will be described. When the imaging device 1 is driven, the pressure supply / discharge control device 50 drives the pressure supply / discharge means 5. As a result, air pressure is applied to the moving body 3 as fluid pressure, the moving body 3 moves in the moving guide tube 2, and the camera 4 moves through the inner correction lens 6, the moving guide tube 2, and the outer correction lens 7. The outside of the guide tube 2 is imaged.

  According to the best mode, since the inner correction lens 6 and the outer correction lens 7 are provided, the captured image does not become a curved image, and an image with less distortion can be obtained.

  In addition, the inner correction lens 6 is attached to the moving body 3 or the camera 4 so as to move as the moving body 3 moves, so that the inner correction lens 6 extends over the movable range of the moving body 3. Therefore, it is possible to reduce the cost of the inner correction lens 6 and thus the entire apparatus.

If the inner correction lens 6 is provided across the movable range of the movable body 3, the curved convex surface 62 of the inner correction lens 6 and the curved inner surface 65 of the moving guide tube 2 are in close contact with each other by an adhesive or a fixture not shown. Therefore, it is possible to obtain an image with less distortion.
Water pressure may be used as the fluid pressure.
The imaging device of the present invention can also be used for underwater photography.

1 is a configuration diagram of an imaging apparatus (best mode). AA sectional drawing of FIG. 1 (best form).

Explanation of symbols

1 imaging device, 2 moving guide tube, 3 moving body, 4 camera,
5 Pressure supply / discharge means, 6 inner correction lens, 7 outer correction lens,
39 light transmission part, 41 lens, 42 optical axis, 61 plane,
62 curved convex surface, 65 curved inner surface, 68 curved outer surface,
71 plane, 73 curved concave surface.

Claims (2)

  A moving guide tube formed in a circular cross section, and a moving body provided in the moving guide tube so as to be movable in the moving guide tube along the central axis of the moving guide tube by receiving fluid pressure supplied in the moving guide tube An imaging device comprising: a camera that is provided on the moving body and images the outside of the moving guide tube through the light transmitting portion of the moving guide tube; and a pressure supply / discharge unit that supplies and discharges fluid pressure to and from the moving guide tube An inner correction lens provided in front of the camera lens inside the moving guide tube, and an outer correction lens provided in front of the camera lens outside the moving guide tube across the movable range of the moving body. The inner correction lens has a plane perpendicular to the optical axis of the camera lens and a curved convex surface corresponding to the curved inner surface of the moving guide tube positioned in front of the camera lens, Lens is an imaging apparatus characterized by having a plane perpendicular to the curved outer surface of the moving guide tube located in front of the camera lens and the optical axis of the corresponding curved concave and camera lens.   The imaging apparatus according to claim 1, wherein the inner correction lens is attached to a movable body or a camera and is provided to move along with the movement of the movable body.

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