JPH09159926A - Wide-angle periscopic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To instantaneously grasp circumstances not only in a horizontal direction but also in a skyward direction by arranging a wide-angle lens at the upper part of a lens barrel so as to face in the skyward direction. SOLUTION: A fisheye lens whose angle of view 11 is 180 deg. is used as the wide-angle lens 1, which is arranged at the upper part of the lens barrel 3 so that an optical axis 10 may turn in the skyward direction. By using the fisheye lens whose angle of view 11 is 180 deg., not only the optical image of a B target 9 in the horizontal direction in parallel with a water surface 12 but also that of an A target 8 in the skyward direction in parallel with the optical axis 10 are simultaneously caught. In a video pickup device 2, the upper part of the lens barrel 3 including the lens 1 is projected upward from the water surface 12, whereby the optical image obtained through the lens 1 is converted into a video image. A recorder 4 records a time sequential image signal on a medium such as a magnetic tape. An image converter 6 converts the video image into a digital image, and also a wide-angle image into a two-dimensional image in the horizontal direction and that in a vertical direction so as to make the visual sensation of a human being easily judge the circumstances of the external environment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a periscope device mounted on a submarine.

[0002]

2. Description of the Related Art Conventionally, this type of periscope apparatus has been used by being mounted on a submarine. FIG. 2 is a sectional view schematically showing the configuration of a conventional periscope device. As shown in FIG. 2, in the conventional periscope apparatus, an optical image of the objective mirror 16 and the optical axis 22 using a prism that obtains an optical image of the B target 21 through the window 15
Prism eyepiece 18 that emits light after changing the optical path by 0 degree, window 1
The lens barrel 17 is provided with 9 and the upper part of the lens barrel 17 including the window 15 is raised above the water surface 24 to grasp the external situation through the window 19 in the hull 25 by the sight of the crew. . Further, in the conventional periscope apparatus, the lens barrel 17 can be manually rotated, and the crew member manually rotates the lens barrel 17 in the desired direction to grasp the external situation.

[0003]

Since the conventional periscope apparatus has the above-mentioned structure, it has the following problems. The first problem is that while the periscope device that appears above the water surface 24 can grasp the external situation of the ship, opponent B target 2
Despite having the danger of detecting the position of the ship even from point 1, it took a long time to complete the situation grasp in all directions. The reason is that it is only the azimuth that is visible through the window 15 through the window 15 that can grasp the external situation at a time, and in order to grasp the omnidirectional situation, the lens barrel 17 is manually rotated in all azimuths. This is because the rotation takes time, and it takes time for one crew member who looks into the window 19 to judge the situation in each direction.

The second problem is that although the outside world is not limited to the horizontal direction parallel to the water surface 24 but also to the sky direction, the situation in the sky direction cannot be grasped.
He had a danger of not being able to recognize the A target located in the heavenly direction and being able to detect the position of his own ship. The reason for this is that the periscope device that appears above the water surface 24 can grasp only the horizontal direction, and the angle of view 23 that is the grasping range in the upward direction is narrow. This is because the optical axis of the optical system is arranged parallel to the horizontal plane and the image can be captured only in the range on the extension of the straight line connecting the window 15 and the objective mirror 16.

An object of the present invention is to solve the above-mentioned problems, by instantaneously recording the situation of the outside world in all directions in the horizontal direction and in the direction of the sky, and by analyzing the situation of the outside world by a large number of crew members. It is to provide a periscope device capable of performing.

[0006]

SUMMARY OF THE INVENTION A wide-angle periscope apparatus of the present invention is a wide-angle lens capable of simultaneously observing not only the horizontal direction parallel to the water surface but also the heavenly direction, and an optical image of the wide-angle lens. A lens barrel composed of a video image pickup device for converting into a video image and outputting the video image, a video image recorder for recording an instantaneous external environment which is an output of the video image pickup device, and a distortion of a wide-angle image output by the video image pickup device. It is characterized in that it is provided with an image conversion processor for returning the image to an original image and a display for displaying the image.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION By using a wide-angle lens, the angle of view is wider and the observation area is wider than that of a conventional window. Further, by arranging the fish-eye lens having an angle of view of 180 degrees so as to face upward, it is possible to simultaneously observe not only the horizontal direction parallel to the water surface but also the upward direction. Next, by converting the optical image of the wide-angle lens into a video image and recording it, it is possible to magnify and analyze the external environment observed through the wide-angle lens while the periscope is lowered below the water surface. . Further, by providing the display device for displaying the video image, not only one crew member but also a large number of crew members can grasp the situation of the outside world, and the situation can be judged accurately and promptly.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the present invention.
The embodiment shown in FIG. 1 has a wide-angle lens 1 and a video imaging device 2.
A lens barrel 3 provided with a video image recorder 4 that receives the output of the video imaging device 2 in the hull 13, a display controller 5 that controls the selection and size of a display surface image, and a wide-angle video. An image converter 6 that restores wide-angle distortion of an image to an original image and a display 7 that displays an output of the image converter 6 is configured.

As the wide-angle lens 1 described above, a fish-eye lens having an angle of view 11 of 180 degrees is used, and it is arranged above the lens barrel 3 so that the optical axis 10 faces upward. By using a fisheye lens having an angle of view of 180 degrees, not only the horizontal B target 9 parallel to the water surface 12 but also the vertical A direction parallel to the optical axis 10 can be used.
It is possible to simultaneously capture the optical image of the target 8.

In the video image pickup device 2, an optical image obtained through the wide-angle lens 1 by exposing the upper part of the lens barrel 3 including the wide-angle lens 1 above the water surface 12 is video-recorded by using a solid-state image pickup device camera such as CCD. Convert to image. The video image recorder 4 receives the output of the video imaging device 2 as an input,
The time-series image signal is recorded on a medium such as a magnetic tape.
The display controller 5 has an operation console, and controls the image converter 6 to control which video image is displayed in which direction at which time or display size such as enlargement and reduction. The image converter 6 receives the video image recorded in the video image recorder 4 or the video image being recorded, and performs A / D conversion processing to convert it into a digital image. Also, the input video imaging device 2
The wide-angle distortion of the output wide-angle image is converted into a horizontal two-dimensional image parallel to the water surface 12 and a vertical two-dimensional image parallel to the water surface 12 so that human vision can easily judge the external situation. Further, under the control of the operation console of the display controller 5, the recording time and the direction of the image displayed on the display 7 are selected, and the size conversion such as enlargement and reduction is performed. The display 7 is
The output of the image converter 6 is input and displayed as a video.

[0011]

As an effect, by arranging the wide-angle lens on the upper part of the lens barrel so as to face upward, it is possible to instantly grasp the situation not only in the horizontal direction but also in the upward direction. In addition, by recording the external environment instantaneously, it is not necessary to put the periscope on the surface of the water for a long time, and it becomes possible for the crew to analyze the recorded image in detail with the periscope lowered below the surface of the water. . This has the effect of shortening the time it takes for the periscope to be brought out onto the surface of the water, and making it difficult for the opponent's target to detect the position of the ship.

[Brief description of the drawings]

FIG. 1 is a block diagram of one embodiment of the present invention.

FIG. 2 is a sectional view schematically showing a configuration of a conventional periscope device.

[Explanation of symbols]

 1 Wide-angle lens 2 Video imaging device 3 Lens barrel 4 Video image recorder 5 Display controller 6 Image converter 7 Display panel (display) 8 A target 9 B target 10 Optical axis 11 Field angle 12 Water surface 13 Hull 15 Window 16 Objective lens 17 Lens barrel 18 Eyepiece 19 Window 20 A target 21 B target 22 Optical axis 23 Angle of view 24 Water surface 25 Hull

Claims (2)

[Claims] 1. A periscope device mounted on a submarine,
A lens barrel having a wide-angle lens facing upward, a video image pickup device for converting an optical image obtained through the wide-angle lens into a video image, and a video image recorder for recording the output of the video image pickup device are displayed. A display controller for controlling image selection and size, an image converter for restoring wide-angle distortion of a video image recorded in the video image recorder or a video image being recorded to an actual image, and the image converter A wide-angle periscope device characterized by comprising a display for displaying the output of the container. 2. The wide-angle periscope apparatus according to claim 1, wherein the wide-angle lens is a fish-eye lens having an angle of view of 180 degrees.