JPH0576052A - Video switching device - Google Patents

Abstract

PURPOSE:To operate a parallactic stereoscopic video recording by mounting this device on an existing VTR camera by an adaptor system. CONSTITUTION:This device is equipped with a projecting lens 1 for right eye, and a projecting lens 2 for left eye having optical axes which a reparallel or crossing at a certain distance, mirror means 5 which reflects the optical axis of the projecting lens 1 for right eye, and guides it to a half mirror 6, other mirror means 3 and 4 which reflect the optical axis of the projecting lens 2 for left eye, and guide it to the half mirror 6, liquid crystal shutter 8 arranged between the projecting lens 1 for right eye and the mirror means 5, and other liquid crystal shutter 7 arranged between the projecting lens 2 for left eye and the other mirror means 3 and 4. Then, a video switching device main body case 14 which houses those members, can be connected with a VTR camera 9 so that the optical axes of the lenses can be matched with the reflected optical axis of the half mirror 6. And also, this device is equipped with a control means 15 which switches the liquid crystal shutters 7 and 8 by a control synchronizing signal from the VTR camera 9, and obtains the video signal having a parallax in each field.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal switching device used when recording a stereoscopic image.

[0002]

2. Description of the Related Art A conventional stereoscopic television and recording apparatus will be described below.

FIG. 3 is a schematic cross-sectional view showing a conventional video switching device.

Reference numeral 1 is a convex lens for the right eye, and 2 is a convex lens for the left eye. Reference numeral 11 is a first CCD for the right eye which converts the light converged by the convex lens 1 for the right eye into an electric signal, and 12 is a second CCD for the left eye which converts the light converged by the convex lens 1 for the left eye into an electric signal. is there. 13 is the first CCD 11 and the second
This is a signal switching unit for switching between the CCD 12 and the CCD 12. Reference numeral 9 is a VTR camera connected to the signal switching unit 13.

Such a conventional image switching apparatus has a right-eye convex lens 1 and a left-eye convex lens 2 whose optical axes intersect each other in parallel or at a certain distance, and the first and second convex lenses 1 and 2 are arranged on the optical axis. CCDs 11 and 12 are arranged.

The video signals obtained by the first and second CCDs 11 and 12 are switched by the signal switching unit 13 for each field and recorded in video.

[0007]

However, the above-mentioned conventional configuration requires a dedicated VTR camera device,
Originally, there was a problem that two optical systems such as a lens, a CCD, and a zoom mechanism were required.

SUMMARY OF THE INVENTION The present invention solves the problems of the conventional video switching device described above, and an object of the present invention is to provide a video switching device which enables stereoscopic video recording by being attached to an existing VTR camera in the form of an adapter. ..

[0009]

In order to achieve this object, an image switching apparatus of the present invention comprises a right-eye convex lens and a left-eye convex lens having optical axes that are parallel or intersect at a certain distance, and the right-eye convex lens. Between the mirror means for reflecting the optical axis of the convex lens to guide to the half mirror, another mirror means for reflecting the optical axis of the left-eye convex lens to guide to the half mirror, and between the right-eye convex lens and the mirror means. An image switching device body case that includes a liquid crystal shutter arranged and another liquid crystal shutter arranged between the left-eye convex lens and the other mirror means is a VTR camera, and the video switching device main body case has the lens. The optical axis of the VTR camera can be connected so that it coincides with the reflected optical axis of the half mirror.
A control means for switching between two liquid crystal shutters to obtain a video signal having parallax for each field is provided.

[0010]

With this structure, the video switching device body case is connected to the VTR camera so that the optical axis of the lens thereof coincides with the reflected optical axis of the half mirror, and the light that intersects in parallel or at a certain distance is crossed. Light is incident through a right-eye convex lens and a left-eye convex lens having an axis, and the control means
While switching the two liquid crystal shutters for each field by using the control synchronization signal of the VTR camera, the light from each lens is made incident on the lens of the VTR camera,
Obtain a stereoscopic video signal.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of a video switching device according to an embodiment of the present invention, and FIG. 2 is a perspective view of the video switching device attached to an existing VTR 9.

Reference numeral 1 is a convex lens for the right eye, and 2 is a convex lens for the left eye. 3 is a first mirror behind the left-eye convex lens 2. A second mirror 4 receives and reflects the light from the first mirror 3. Reference numeral 5 is a third mirror behind the right-eye convex lens 1. Reference numeral 6 is a half mirror that reflects the reflected light from the second mirror 4 and the third mirror 5. Reference numeral 7 is a first liquid crystal shutter existing between the second mirror 4 and the half mirror 6. 8 is the third mirror 5
And a second liquid crystal shutter existing between the half mirror 6. Reference numeral 9 is an existing VTR camera. 10 is the V
This is a V sync control signal for the TR camera 9. VTR camera 9
Is detachably connectable so that the optical axis of the lens is aligned with the optical axis from the half mirror 6 of the image switching apparatus of this embodiment. Reference numeral 14 is a case of the video switching device. Further, reference numeral 15 is a control means for on / off controlling the first liquid crystal shutter 7 and the second liquid crystal shutter 8.

Next, the operation of the above embodiment will be described.

The video switching device body case 14 of this embodiment is attached to the VTR camera 9. The optical axes of the right-eye convex lens 1 and the left-eye convex lens 2 are parallel or intersect at a certain distance. The light that has entered the right-eye convex lens 1 is reflected by the third mirror 5, and the second liquid crystal shutter 8
While being turned on and off, the light is reflected by the half mirror 6 and is incident on the VTR 6.

On the other hand, the light incident on the left-eye convex lens 2 is reflected by the first mirror 3, further reflected by the second mirror 4, and turned on and off by the first liquid crystal shutter 7, while being turned on and off by the half mirror 6. And is incident on the VTR 6. The light beams incident from the right-eye convex lens 1 and the left-eye convex lens 2 have their optical axes matched by the half mirror 6, and V
The light enters from the lens portion of the TR camera 9 on the same optical axis.

The control means 15 controls the VTR camera 9
The switching of the two liquid crystal shutters 7 and 8 is controlled by the V synchronization control signal 10 from

In this way, a video signal having parallax for each field is obtained.

In this embodiment, the zoom mechanism and the focus mechanism may be omitted.

The light incident from the left-eye convex lens 2 is not necessarily guided to the half mirror 6 by using the two mirrors 3 and 4, and the light incident from the right-eye convex lens 1 is not always 1. It is not necessary to guide the half mirror 6 using the single mirror 5. Regardless of the number of sheets, it is sufficient to guide light to each half mirror.

[0021]

As described above, according to the present invention, a right-eye convex lens and a left-eye convex lens having optical axes that are parallel or intersect at a certain distance, and a half mirror that reflects the optical axis of the right-eye convex lens. Mirror means for guiding to the half mirror, another mirror means for reflecting the optical axis of the left-eye convex lens to the half mirror, and a first liquid crystal shutter arranged between the right-eye convex lens and the mirror means. An image switching device body case that includes a second liquid crystal shutter disposed between the left-eye convex lens and the other mirror means, and accommodates these members is a VTR camera, and the optical axis of the lens is the half It is connectable so as to coincide with the reflection optical axis of the mirror, and the two liquid crystal shutters are switched by a control synchronization signal from the VTR camera to display an image with parallax for each field. Since a control means for obtaining a signal,
No need for a dedicated VTR camera device, lens and C
The problem that two optical systems such as a CD and a zoom mechanism are required can be solved, and an excellent image switching device that can obtain a stereoscopic image by attaching it to an existing VTR camera in an adapter format can be realized Is.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which an image switching device according to an embodiment of the present invention is attached to a VTR camera.

FIG. 2 is a perspective view showing a state in which the image switching device of the embodiment is attached to a VTR camera.

FIG. 3 is a cross-sectional view showing a conventional video switching device.

[Explanation of symbols]

 1 Convex Lens for Right Eye 2 Convex Lens for Left Eye 3 First Mirror 4 Second Mirror 5 Third Mirror 6 Half Mirror 7 First Liquid Crystal Shutter 8 Second Liquid Crystal Shutter 9 VTR Camera 10 V Sync Control Signal 11 First CCD 12 Second CCD 13 Signal switching unit 14 Video switching device body case 15 Control means

Claims (1)

[Claims] 1. A right-eye convex lens and a left-eye convex lens having optical axes that are parallel or intersect at a certain distance, mirror means for reflecting the optical axis of the right-eye convex lens to a half mirror, and the left-eye lens. Of another mirror means for reflecting the optical axis of the convex lens and guiding it to the half mirror, a liquid crystal shutter arranged between the convex lens for the right eye and the mirror means, the convex lens for the left eye and the other mirror means An image switching device main body case that includes another liquid crystal shutter arranged between them and that accommodates these members can be connected to a VTR camera so that the optical axis of its lens coincides with the reflection optical axis of the half mirror. Therefore, a control means for switching the two liquid crystal shutters by a control synchronization signal from the VTR camera to obtain a video signal having a parallax for each field is provided. Characteristic video switching device.