JPH07199383A - Method for taking in static image of high-speed moving object and its device for taking in static image - Google Patents

Abstract

PURPOSE:To provide a method for taking in the static image of a high-speed moving object having an effect of extremely enlarging a static range etc., as a stroboscopic device is not used and its device for taking the static image. CONSTITUTION:The former comprises placing a mirror in front of a camera and photographs the image by rotating the mirror in conformity with the speed of printed matter in order to take in the wide range as the static image without utilizing the stroboscopic device. The latter consists of a means 3 for moving a subject 2, such as printed matter, in a horizontal state, a moving speed detecting 4 means for detecting the moving speed of the subject 2, the mirror 5 which is placed in the position above the subject 2 and rotates in synchronization with the moving speed of the subject and a means 6 for recording the image of the subject. The device is so constituted that a means 6 for recording the image actuates when the mirror 5 attains 45 deg.C angle with the moving direction of the subject.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for capturing a still image of a high-speed moving object when the high-speed moving object is photographed by using an image recording means such as a camera, a video camera, a CCD camera, and the like. The present invention relates to a still image capturing device that is suitable for realization,
The present invention relates to a method that can be used when printing at a high speed such as a rotary printing machine, displaying the printing state as a still image on a television screen, or detecting a printing abnormality.

[0002]

2. Description of the Related Art Heretofore, in this type, the following has been done. The strobe flashes in synchronization with the speed of the printed matter, and the afterimage effect is used to take a still image with a camera or the like.

[0003]

The problems described in the prior art have the following problems. That is, since a stroboscope is used in the past, the uniform irradiation range is narrow and only a still image can be captured in a small range. The present application has been made in view of such problems of the conventional technology, and an object of the present application is to provide the following things.
In order to capture a wide area as a still image without using a strobe, a mirror is placed in front of the camera and the mirror is rotated according to the speed of the printed matter to take an image. That is, when photographing an automobile running at high speed in a car race or the like, a person tries to photograph by moving a camera according to the speed of the automobile.

[0004]

In order to achieve the above object, the present invention is as follows. That is,
In order to capture a wide range as a still image without using a strobe, a first invention places a mirror in front of a camera and rotates the mirror at the speed of the moving printed matter while the mirror is printed. On the other hand, it is a method for capturing a still image of a high-speed moving object, which is configured to capture an image when a predetermined angle is reached. The second invention is a subject 2 such as a printed matter.
Means for moving the object 2 in a horizontal state, a moving speed detecting means 4 such as a printing speed detecting photodiode for detecting the moving speed of the object 2, a moving direction of the object above the object 2, and The mirror 5 that rotates in synchronism with the moving speed and the mirror 5 are supported so as to be positioned on the side opposite to the moving direction of the subject at the same level and to act in a direction parallel to the moving direction of the subject. A camera, a video camera, a CCD camera or the like for recording an image, and the mirror 6 is configured to operate when the mirror 5 forms an angle of 45 degrees with respect to the moving direction of the object. It is a still image capturing device for a high-speed moving object.

[0005]

EXAMPLES Examples will be described with reference to the drawings. A still image capturing method of a high-speed moving object as a first invention is
It is configured as follows. Without using strobe,
In order to capture a wide range as a still image, place a mirror in front of the camera, rotate the mirror at the speed of the moving printed matter, and take an image when the mirror reaches a predetermined angle with respect to the printed matter. Is configured. The predetermined angle is shown in FIG.
As in (B), the center of the object to be photographed is set to the center of the opening time of the shutter when the mirror reaches 45 degrees.
When a rectangle is photographed, the image is exaggeratedly expressed as shown in FIGS. 7 (A), (B), and (C). Therefore,
The shutter is controlled so that the position b (45 degree position) becomes the center of the opening time of the shutter. If you increase the shutter speed, you can shoot with higher accuracy. With reference to FIG. 8, for example, when the shutter opening time is 1/250 seconds (= 4 mm seconds) and the shooting target moving time is 300 m / min, the shooting target is 2 c during 4 mm seconds when the shutter is open.
Move m. The mirror rotates in synchronization with the moving speed of the object to be imaged. Therefore, in this case, the shutter is controlled to open 2 mm seconds before the mirror reaches 45 degrees and close 2 mm seconds after 45 degrees.

[0006] 1 is the first suitable for realizing the first invention
The invention is a still image capturing device for a high-speed moving object, which is configured as follows. A means 3 for moving the object 2 such as a printed matter in a horizontal state, a moving speed detecting means 4 such as a printing speed detecting photodiode for detecting the moving speed of the object 2, and a moving direction of the object at a position above the object 2. At the same time, the mirror 5 that rotates in synchronization with the moving speed of the subject and the mirror 5 that is located on the opposite side to the moving direction of the subject at the same level as the mirror 5 and that is parallel to the moving direction of the subject. And a means for recording an image 6 such as a camera, a video camera, a CCD camera or the like supported so as to operate, and a means 6 for recording an image when the mirror 5 is at an angle of 45 degrees with respect to the moving direction of the object. It is configured to work.

In the figure, 5A is a frame for supporting the mirror 5 and the like, and 5B is supported at the upper end of the frame so as to have a direction orthogonal to the moving direction of the object and to rotate in a direction opposite to the moving direction of the object. And a mirror 5 is fixed to the shaft. 5C is a motor for rotating this shaft, 5D is an encoder attached to this motor, and 5E is a photointerrupter for detecting 45 degrees of the mirror 5.

1. A mirror is placed in front of the camera as shown in FIGS. 2 to 4, and the mirror is rotated according to the moving speed of the printed matter. 2. The shutter is pressed and photographed at the timing shown in FIG. Example 1: When the shutter speed is 1/250 seconds
It will be "open" for 0.004 seconds. When the printed matter is moving at 300 m / min, the shutter speed allows the printed matter to move 20 mm while the shutter is open.
Referring to FIG. 9, for example, when the distance a is 2000 mm and the moving speed of the imaging target is 500 mm / sec, tan θ =
(500/2000), θ = about 14.036 degrees, and the rotation speed of the mirror becomes θ / 2 = about 7.018 degrees / second. Therefore, the mirror is controlled to make one rotation in about 52.3 seconds.

Example 2 When the shutter speed is 1/450 seconds, the shutter is "open" for about 0.0022 seconds. If the printed matter is moving at 300 m / min, the shutter speed will cause the printed matter to move about 11.1 mm while the shutter is open. The image appears faint when the shutter is pressed down while the mirror is stopped at 45 degrees. A still image can be obtained by adjusting the speed of the mirror to the printed matter.

In addition to the above, the present invention can be made as follows. 1. Other than a mirror, it is possible to use an object capable of refracting light, such as a prism, or it is possible to rotate the camera itself although it becomes heavy. 2. There is also a method in which the mirror is not rotated once but rotated while the shutter is open, and the mirror is returned to its original position when the shutter is closed. 3. This method can be applied to all objects that move at high speed, other than static observation of printed matter.

The operation will be described together with the effects.

[0012]

Since the present invention is configured as described above, it has the following effects. 1. Since the strobe is not used, the stationary range becomes very large. 2. The drive mechanism can be small because the mirror in front of the camera is rotated instead of moving the heavy camera itself.

[Brief description of drawings]

FIG. 1 is a perspective view of the entire apparatus.

FIG. 2 is a schematic vertical cross-sectional view showing a state immediately before a mirror makes an angle of 45 degrees with respect to a moving direction of an object.

FIG. 3 is a schematic vertical cross-sectional view when the mirror reaches an angle of 45 degrees with respect to the moving direction of the object.

FIG. 4 is a schematic vertical cross-sectional view showing a state immediately after the mirror has an angle of 45 degrees with respect to the moving direction of the object.

FIG. 5 is an overall block diagram.

FIG. 6 is a time chart illustrating the timing at which the shutter speed opens and closes.

FIG. 7A is an explanatory diagram in which a rectangle is captured when the center of shutter opening is before 45 degrees.
(B) is an explanatory view in which a rectangle is captured when the center of the shutter opening is at 45 degrees. FIG. 6C is an explanatory view in which a rectangle is captured when the center of the shutter opening is 45 degrees or more.

FIG. 8 is an explanatory diagram showing the relationship between the angle of the mirror and the center position of the shutter opening in FIGS. 7A, 7B, and 7C.

9 is an explanatory diagram of Example 1. FIG.

[Explanation of symbols]

 1 still image capturing device for high-speed moving object 2 subject 3 means for moving subject in horizontal state 4 moving speed detecting means 5 mirror 6 means for recording image

Claims (2)

[Claims] 1. A mirror is placed in front of a camera in order to capture a wide range as a still image without using a strobe, and the mirror is rotated on the printed matter while rotating the mirror at the speed of the moving printed matter. On the other hand, a method for capturing a still image of a high-speed moving object, characterized by being configured to capture an image when a predetermined angle is reached. 2. A means (3) for moving a subject (2) such as a printed matter in a horizontal state, and a moving speed detecting means (4) such as a printing speed detecting photodiode for detecting the moving speed of the subject (2). And a mirror (5) having a moving direction of the object above the object (2) and rotating in synchronization with the moving speed of the object, and a moving direction of the object at the same level with respect to the mirror (5). Is a camera, video camera, CCD that is located on the opposite side and is supported so as to operate in a direction parallel to the moving direction of the subject.
An image recording means (6) such as a camera, which is configured to operate when the mirror (5) forms an angle of 45 degrees with respect to the moving direction of the object. A device for capturing a still image of a high-speed moving object, characterized in that