JPS6214157B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an imaging device for obtaining a three-dimensional image of a subject.

An example of a conventional device of this type is shown in FIG. To explain this, a subject 3 is imaged by left and right video cameras 1 and 2 arranged corresponding to the left and right human eyes, and output video signals 4 and 5 from these video cameras 1 and 2 are used as signals. It is supplied to the switching device 6. The signal switch 6 is configured to switch between the video signals 4 and 5 using an appropriate synchronization signal and output the signal to an output terminal 7 as a composite video signal 8.

The composite video signal 8 is supplied to the television receiver through a shutter means that allows the left and right eyes to sequentially view the video in synchronization with the display period of the left and right video signals. When you look at a screen, you can see it in 3D due to the parallax between your left and right eyes.

However, in the case of such a stereoscopic viewing method that utilizes the parallax between the left and right eyes, the focus positions and zoom amounts of the zoom lenses 9 and 10 provided in the video cameras 1 and 2 need to be the same on the left and right sides. Therefore, it takes time to operate the zoom ring and focus ring of the zoom lenses 9 and 10 individually. Also, when zooming up, etc., it is necessary to change the left and right zoom lenses 9, 10 by the same amount at the same time, but if you operate the left and right zoom lenses 9, 10 independently, the left and right zoom amounts will vary, so when zooming up, etc. The camera work was extremely difficult, and it was also difficult to operate the focus ring the same amount.

The present invention provides an imaging device that can solve the above-mentioned conventional problems by making it possible to control zoom and focus of the left and right zoom lenses in conjunction with each other using the same operating member.

Hereinafter, the present invention will be explained based on illustrated embodiments.

FIG. 2 is a schematic diagram showing the main structure of an embodiment of the present invention. In the figure, a first video camera 12 and a second video camera 13 are installed symmetrically at a predetermined interval on a base 11.
The video camera 12 has a first zoom lens 14.
However, the second video camera 13 is equipped with a second zoom lens 15 so as to be able to image the same subject 16.

The first video camera 12 and the second video camera 13 are operated synchronously by a synchronization signal 18 from a synchronization signal generator 17.
2 output video signal 19 and the second video camera 13
The output video signal 20 is supplied to a signal switch 21. The signal switch 21 is configured to alternately switch the output video signals 19 and 20 for each field in response to the vertical synchronization signal 22 from the synchronization signal generator 17, and output the resultant signal to the output terminal 24 as a composite video signal 23. ing. The synchronization signal switch 21 is composed of a semiconductor switch or the like so that the output video signals 19 and 20 are switched within the vertical blanking period of the video signal, and the video signal is switched on the screen of the television receiver. The location is now invisible.

Also, the focusing means 25 of the first zoom lens 14
is controlled by a focusing operation member 26 provided on the base 11 by an operation force transmission means to be described later,
At the same time, the focusing operation member 26
The focusing means 27 of No. 5 is also controlled. Similarly, the first
The magnification changing means 28 of the second zoom lens 14 is controlled by a magnification changing operation member 29 provided on the base 11 by an operation means to be described later, and at the same time, the magnification changing operation member 29 is controlled by the magnification changing operation member 29 of the second zoom lens 15. The zooming means 30 is also configured to be controlled.

Next, from the focusing operation member 26, the focusing means 25, 2
The operating force transmitting means for transmitting the operating force to 7 will be explained.

FIG. 3 is a plan view showing the detailed structure of the focusing means 2 of the first zoom lens 14.
A gear 31 is provided on the outer periphery of the base 1.
The focusing means drive gear 33 is held rotatably with respect to bearings 32a and 32b provided in the lens 1.

Further, the focusing means driving gear 33 is connected to one end of a center wire 35 of a flexible cable 34, and the center wire 35 is configured to be rotatable within an armored cable 36 fixed to the base 11. FIG. 4 is a sectional view of the flexible cable 34, which is held by the armored cable 36 and can transmit rotational force by twisting the center wire 35. The other end of the central cable 35 of the flexible cable 34 is coupled to a gear 37, and the gear 37 is connected to a bearing 38 provided on the base 11.
It is rotatably held by a and 38b.
Further, the gear 37 meshes with the operating gear 39,
The operating gear 39 is a bearing 40 provided on the base 11.
It is rotatably held by a and 40b,
A focusing operation handle 41 is provided at one end of the operation gear 39. Further, the operating gear 39 is a gear 42.
It is also connected to the focusing means 27 of the second zoom lens 15 in a similar structure.

The structure related to the zooming operation is also the same as the mechanism for the focusing operation described above, so the explanation here will be omitted.

Next, a series of operations will be explained with reference to FIG. By rotating the focusing operation handle 41, a rotational force is transmitted to the focusing means 25 of the first zoom lens 14 through the flexible cable 34, and the focusing means 25 can be rotated.
At the same time, the light is transmitted to the focusing means 27 of the second zoom lens 15 via the flexible cable 43, and can rotate in conjunction with the focusing means 25.

Further, by rotating the variable power operation handle 44, the rotational force is transmitted to the variable power means 28 of the first zoom lens 14 through the flexible cable 45, and the variable power means 28 can be rotated.
At the same time, the light is transmitted to the variable magnification means 30 of the second zoom lens 15 via the flexible cable 46, and can rotate in conjunction with the variable magnification means 28.

As is clear from the above description, the present invention uses a flexible cable to operate the focusing means of two zoom lenses in conjunction with one focusing operation member, and to operate the focusing means of two zoom lenses in conjunction with one focusing operation member. Since the magnification change means of the zoom lens on the stand are configured to be operated in conjunction, it is possible to adjust the left and right zoom lenses by the same amount at the same time, making it extremely easy to perform camera work such as zooming up. It is possible to obtain excellent effects.

In addition, when the zoom lens is controlled using a flexible cable as in the present invention, there is no need for a power source to drive the zoom lens, which reduces battery life, especially when using battery power outdoors. It is advantageous. Furthermore, it has a simple structure and can be realized at extremely low cost.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a conventional imaging device, FIG. 2 is a configuration diagram of main parts of an embodiment of the present invention, FIG. 3 is a plan view of a detailed structure in an embodiment of the present invention, and FIG. It is a sectional view of a flexible cable. 12...First video camera, 13...Second video camera, 14...First zoom lens, 1
5... Second zoom lens, 25, 27... Focusing means, 26... Focusing operation member, 28, 30... Magnification changing means, 29... Magnification changing operation member, 34, 43, 4
5,46...Flexible cable.

Claims (1)

[Scope of Claims] 1. A pair of video cameras installed at a predetermined interval so as to be able to image the same subject, each having a focusing means and a variable magnification means; The attached zoom lens means, one focusing operation member that can operate the pair of focusing means in conjunction with each other, and one variable magnification unit that can operate the pair of zooming means in conjunction with each other. an operating member;
A focusing operation force transmitting means for transmitting an operating force from the focusing operation member to the focusing means; and a zooming operation force transmitting means for transmitting an operating force from the zooming operation member to the zooming means. An imaging apparatus, characterized in that the focusing means and the variable magnification means of the pair of zoom lens means are respectively controlled in conjunction with each other. 2. The imaging device according to claim 1, wherein the focusing operation force transmission means and the zooming operation force transmission means are constructed of flexible cables.