JPS5827710B2 - Satsuzouhouhou - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an imaging method in which the body of a subject is formed on the imaging surface of an imaging tube such as a vidicon, and a video signal corresponding to this body is obtained from the imaging tube. Therefore, it is suitable for obtaining high-speed resolved images.

As is well known, a television screen is made up of 60 fields per second, including odd and even fields.

Therefore, since 1/60 second is required to constitute one field, it was not possible to operate a motion of 1/60 second or less on a television and reproduce it on the television screen so that the state of the motion could be seen.

The present invention was invented in view of the above-mentioned drawbacks, and
According to an imaging method in which the image of a subject is formed on the imaging surface of an imaging tube such as a vidicon, and a video signal corresponding to this image is obtained from the imaging tube, a rotary shutter having a slit for transmitting light is used for said imaging. provided on the front surface of the tube, and one of the imaging surfaces
A screen corresponding to a field is divided into a plurality of small imaging surfaces in both the vertical and horizontal directions, and the light transmitting device passes through a position corresponding to each of the small imaging surfaces of the rotary shutter. The images obtained through the slit are sequentially projected according to the rotation of the rotary shutter, thereby
Images of a common subject whose exposure times within a field period are sequentially shifted are formed on the plurality of small image pickup surfaces, and a large number of images are arranged vertically and horizontally on the image pickup surface and whose exposure times are sequentially shifted. The image capturing surface is scanned to extract one field of video signals each containing a large number of subject images.

With this configuration, even high-speed motion for a period shorter than the time constituting one field can be reproduced and identified on the TV screen so that the state of the motion can be clearly seen with a simple configuration. .

The present invention will be explained in detail below using examples.

1 to 3 show a first embodiment according to the present invention.

Figure 1 shows the subject (not shown) on the left side of this figure
5 is shown.

In front of the image pickup tube 15 are a lens 14, a mirror 1°2.4,
5, 7, 8, 10, 11 and a rotary shutter 17 are respectively arranged.

The mirrors 1°4.7, 10 are arranged at equal intervals around the optical axis A of the image pickup tube 15, and the light from the subject incident on the optical axis A is X parallel to the optical axis A. The light is reflected vertically and in a direction toward the optical axis A.

Therefore, mirrors 1, 4, 7, and 10 are approximately 4
They are placed at an angle of 5°.

Mirrors 2, 5° 8.11 are the same as mirrors 1.4, 7, 10 in the direction on the optical axis A! They are arranged at the same position and reflect the i-light substantially perpendicular to the optical axis A, which is reflected by the mirrors 1, 4, 7, and 10, in the X-parallel force direction with respect to the optical axis A.

Therefore, mirrors 2, 5, 8°11 are also arranged at an angle of 45° with respect to the optical axis A, in other words, mirrors 71 and 2, mirror 4
and 5, mirrors 7 and 8, and mirrors 10 and 11 are X
arranged in parallel.

The light reflected by the mirrors 2, 5, 8, and 11 in a direction parallel to the optical axis A is imaged by the lens 14 on the imaging surface 16 of the imaging tube 15.

At this time, the light reflected by the mirror 2 is transmitted to the imaging surface 1 shown in FIG.
The light that is imaged on the small imaging surface 3 on the mirror 6 and similarly reflected on the mirror 5 is reflected on the small imaging surface 6, the light reflected on the mirror 8 is on the small imaging surface 9, and the light reflected on the mirror 11 is They are configured to form images on the small imaging planes 12, respectively.

A rotary shutter 17 rotated by a motor 13 is arranged in front of the mirrors 1, 4, 7, and 10.

This rotary shutter 17 is provided with a notch 18 as shown in FIG. 2, and is configured to allow the light to be incident on each of the subject mirrors 1, 4, 7, and 10 in sequence through this notch 18.

That is, the notch 18 is reflected by mirror 1 and mirror 2,
The image is then formed on the small imaging surface 3 by the lens 14 .

Similarly, while the notch 18 is in front of the mirror 4, light from the subject is reflected by the mirrors 4 and 5, and then focused on the small imaging surface 6 by the lens 14.

Further, while the notch 18 is in front of the mirror 7, light from the subject is reflected by the mirrors 7 and 8, and then focused on the small imaging surface 9 by the lens 14.

Further, while the notch 18 is in front of the mirror 10, the light from the subject is reflected by the mirror 10 and the mirror 11, and then focused on the small imaging surface 12 by the lens 14.

In the above configuration, the rotation period of the rotary shutter 170 is 1/1, which is the period that constitutes one field of the television screen.
It should match 60 seconds.

In addition, the beam scan and the rotary shutter 17 are arranged so that the area where the beam scan is performed in the image pickup tube 15 and the small imaging plane selected by the rotary shutter 17 do not coincide in time.
The accumulated images formed on each of the small imaging planes are beam-scanned in synchronization with the rotation of the .

The purpose of this synchronization is, for example, if the small imaging surface 6 is exposed when the upper half of the small imaging surfaces 6 and 9 in FIG. This is to prevent an inconvenience that would occur if a signal in which the upper half is the previous exposure image and the lower half is the current exposure image is obtained.

As mentioned above, the rotation period of the rotary shutter 17 is set to 1/60.
By synchronizing this with the beam scanning of the image pickup tube 15, it is possible to obtain four images in the same field with sequential exposure times, without changing the conventional equipment.

That is, in this first embodiment, four small images with different exposure times of 1/240 seconds are sequentially obtained.

Next, FIGS. 4 to 6 show a second embodiment according to the present invention. In this second embodiment, a small imaging surface divided into nine sections is obtained.

In FIG. 4, the image pickup tube 25 is used to photograph the subject (
(not shown) is shown.

In front of the image pickup tube 25, nine lenses 51 to 59, each held in each grid of the grid lens holder 40, are arranged.

The lenses 51 to 59 are used to form an image of light from the subject onto the imaging surface 28 of the imaging tube 25.

Further, the purpose of forming the lens holder 46 in a grid shape is to prevent images formed by adjacent lenses from influencing each other.

Therefore, in line with this purpose, the gap between the grid-like lens holder 40 and the imaging surface 26 of the imaging tube 25 is configured to be as small as possible.

Motors 26 and 27 are installed in front of the nine lenses 51 to 59.
Two rotary shutters 21 and 23 driven by are respectively arranged.

As shown in FIG. 5, the rotary shutters 21 and 23 are rotatably arranged around rotary shafts 22 and 24, respectively.

The button rotary shutter 21 is driven clockwise, and the rotary shutter 23 is driven counterclockwise by motors 26 and 27, respectively.

The rotating shutter 21 has three arcuate slits 31.3.
2.33 are formed concentrically, and the distance from the rotating shaft 22 becomes gradually smaller in the order of slit 31, slit 32, and slit 33.

In addition, as shown in Figure 4, the sulin centered around the rotation axis)3
The three angles 1, 32, and 33 are equal and each is θ, and these three angles θ are equally arranged on the rotary shutter 21 with an angular interval θ.

On the other hand, the rotating shutter 23 also has three arc-shaped sulins) 3
4, 35, and 36 are formed concentrically, and the distance from the rotation axis 24 is slit 34, slit 36, and slit 35.
In this order, the size of the woman gradually decreases.

In addition, as shown in Figure 5, the rotation axis is the center)
The angles 4, 35, and 36 are all equal and each is ψ, and these three angles φ are equally arranged on the rotary shutter 23 with an angular interval φ.

The correspondence relationship between the rotating shutters 21 and 23 and the lenses 51 to 59 is clearly shown in FIG.
52 and 53, the slit 32 is a separate lens 54
, 55, 56, the slit 33 is connected to the lower row of lenses 57, 5.
8 and 59, respectively.

On the other hand, the slit 34 provided in the rotary shutter 23 corresponds to the lenses 51, 54° 57 in the left row, and the slit 35
correspond to the lenses 52, 55, and 58 in the center row, and the slit 36 corresponds to the lenses 53, 56, and 59 in the right row, respectively.

Therefore, when the slits 31 and 34 overlap, the light from the subject enters only the lens 51, and the slits 31 and 34 overlap.
When the lens 52 and the slit 35 overlap, the light from the subject enters only the lens 52.

Similarly, slits 31, 32, 33 and slit 3
The combination of 4, 35, and 36 allows light from the subject to enter only one of the lenses 51 to 59.

In the above configuration, the rotary shutter 21 rotates so that its rotation period (for example, 1/60 seconds) is three times the rotation period of the rotary shutter 23 (for example, 1/180 seconds).

Therefore, while the slit 31 corresponds to the lenses 51, 52, 53, the rotary shutter 23 rotates once, so the slits 34, 35° 36 correspond to the lenses 51, 52, 53, respectively. 51, 52,
The light from the object is sequentially incident on the lens 53.

The same applies to the slits 32 and 33, and therefore, the light from the subject sequentially enters the lenses 51 to 59 during one rotation of the rotary shutter 21.

The light incident on the button lenses 51 to 59 enters the small imaging surfaces 41 to 4.
Since the light from the subject is imaged on the small imaging surfaces 41 to 49 in sequence.

As mentioned above, the rotation period of the rotary shutter 21 is made to match the period of 1760 seconds that constitutes one field of the television screen, and the rotation period of the rotary shutter 23 is made to be 173 times that amount, 1/180 seconds, and the first embodiment For the same reason, the beam scanning of the image pickup tube 15 and the rotating shutters 21 and 23
By synchronizing the zero rotation with each other, it is possible to obtain nine images in the same field with sequentially different exposure times, without changing the conventionally used apparatus.

That is, in this second embodiment, nine small images with different exposure times of 11,540 seconds are sequentially obtained.

When reproducing the video signal obtained by the image pickup tube applied to the first and second embodiments described above on a television screen, the video signal is once recorded on a VTR, VSR, etc., and then recorded as a still image at any time. Preferably, each individual resolved image is observed.

Furthermore, it is also possible to project one separated image on a screen placed at the position of the subject at the time of photography by reversing the traveling direction of the light from that at the time of imaging.

For example, in FIG. 1, a television screen on which a separated image is formed is placed at the position of the imaging surface 16, and the light from this separated image is allowed to travel to the left in FIG. After being reflected by mirrors 1° 4.7 and 10, which range from 5 to 8 to 11, the separated images are sequentially selected by the rotary shutter 17.
It is also possible to project one separated image on a screen placed at the position of the subject at the time of imaging.

At this time, the resolved image placed at the position of the imaging surface 16 is transferred to the VTR, .
If still images obtained by VSR or the like are sequentially switched, it is also possible to obtain a slow motion image on the screen.

Furthermore, although the above description has been made using the first embodiment as an example, the same can be applied to the second embodiment as well.

Furthermore, in order to obtain a synchronization signal for synchronizing the rotating shutter during image capture, one
A photosensor is installed at the same time, and the signal generated from the photosensor when light from the scanning line of the monitor TV enters the photosensor is used as a synchronization signal, and this synchronization signal is used to synchronize the rotating shutter with the beam scanning of the image pickup tube. It may be rotated by hand.

In this way, the device according to the invention can be used as an additional adapter to previously used devices without having to modify them.

As described above, the present invention provides that the screen corresponding to one field of the image pickup surface of the image pickup tube is divided into a plurality of small image pickup surfaces, and a rotating shutter passes through a position corresponding to each of the small image pickup surfaces. The images obtained through the light slit are sequentially projected according to the rotation of the rotary shutter, and thereby 1
A common object image whose exposure time within a field period is sequentially shifted is formed on each of the plurality of small imaging planes to obtain a large number of the subject images whose exposure timing is sequentially shifted, and the imaging plane is scanned. Since one field of video signal containing each of these multiple subject images is extracted, the high-speed motion of the subject that occurs in a period shorter than the time that makes up one field can be reproduced on the TV screen so that the state of the motion can be seen. It is possible to identify.

In addition, the large number of small image pickup surfaces divides the image pickup surface of the image pickup tube into multiple sections by tilting the image pickup tube vertically and horizontally, and a large number of subject images whose exposure times are sequentially shifted are arranged vertically on the image pickup surface. Since the small imaging planes are arranged horizontally and vertically, the small imaging planes do not become extremely elongated and their vertical and horizontal lengths can be made equal to each other. The surface can be used as effectively as possible, and therefore the high-speed motion of objects of various shapes can be reproduced and identified on the television screen so that the state of the motion can be clearly seen.

In addition, the image of a common subject is sequentially projected onto a large number of small imaging planes in accordance with the rotation of a rotary shutter having a transparent slit, and the projected subject image is scanned in a conventional manner. This makes it possible to obtain a one-field video signal corresponding to the subject image, and therefore the configuration is extremely simple.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical sectional view of a first embodiment of the present invention, and a second embodiment of the present invention is shown in FIG.
3 is a schematic diagram showing the imaging surface of the image pickup tube shown in FIG. 1; FIG. 4 is a schematic vertical sectional view of a second embodiment of the present invention; Figure 5 is the 4th
FIG. 6 is a front view of a portion of the rotary shutter shown in the figure, and FIG. 6 is a diagram showing the imaging surface of the f-quadrant in FIG. Referring to the symbols used in the drawings, 3, 6, and 9 degrees 12 are small imaging surfaces, 17 is a rotating shutter, 21 degrees 23 is a rotating shutter, and 41-49 are small imaging surfaces.

Claims (1)

[Claims] 1. For an imaging method in which an image of a subject is formed on the imaging surface of an imaging tube and a video signal corresponding to this image is obtained from the imaging tube, a rotating shutter having a slit for transmitting light is attached to the imaging tube. Provided on the front surface, each of the small imaging surfaces of the rotary shutter corresponds to a large number of small imaging surfaces that are divided into a plurality of three screens in both the vertical and horizontal directions, each corresponding to one field of the imaging surface. The features of a common subject whose exposure times within one field period are sequentially shifted are projected sequentially according to the rotation of the rotary shutter. 1. Obtain a large number of subject images that are arranged vertically and horizontally on the imaging plane and whose exposure times are sequentially shifted, and scan the imaging plane to capture these many subject images. An imaging method characterized in that one field of video signals each containing an image is extracted.