JPS6138451B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a three-dimensional imaging device that provides an image having parallax information to the left and right eyes of an observer so as to perceive a three-dimensional image, and particularly relates to a three-dimensional imaging device that provides an image having parallax information to the left and right eyes of an observer, and particularly relates to a three-dimensional imaging device that provides an image having parallax information to the left and right eyes of an observer, and particularly relates to a three-dimensional imaging device that provides an image having parallax information to the left and right eyes of an observer, so that a three-dimensional image is perceived. This is designed to reduce the so-called dark zone, which is the area where this occurs.

FIG. 1 shows a three-dimensional imaging device using a large convex lens 1. Left and right images from projectors 2a and 2b are viewed by the left and right eyes 4L and 4R of an observer 3 through the convex lens 1, respectively. Images can be viewed with a three-dimensional effect. here,
If the observer 3 moves to the right as indicated by 3' and his left eye 4L comes to be in the original position of his right eye 4R, he will see images from the projectors 2b and 2c. In this way, while moving the observation position, there is a region where no light is projected from any of the projectors 2a, 2b, and 2c, and therefore the image disappears. As described above, the three-dimensional imaging apparatus shown in FIG. 1 has the disadvantage that the optimum viewing position is limited to a narrow one, making it difficult to use in practice.

An object of the present invention is to eliminate such drawbacks, and to provide a three-dimensional imaging device with an expanded range of good stereoscopic viewing.

An embodiment in which the present invention is applied to a three-dimensional imaging device using a lenticular lens will be described below. In this example, a television image is used as the video source, and imaging is performed as shown in FIG. That is, the lenticular lens 6 is attached on the photoelectric conversion surface of the image pickup tube 5 shown by the imaginary line (two-dot chain line). A large diameter lens 8 and a slit plate 9 are arranged between the subject 7 and the lenticular lens 6. The slit plate 9 includes two slits 10L and 10R extending in the vertical direction. Lens 8 has slits 10L and 10R.
The light passing through is focused on the back surface (photoelectric conversion surface) of the lenticular lens 6, and in this example, it is composed of two convex lenses and one concave lens. Slit 1 for subject 7
The image viewed through 0L and 10R is converted into a large number of line images through the lenticular lens 6, which are photographed by the image pickup tube 5. By using the large diameter lens 8, there is no need to provide a lens for each slit.

The output of the image pickup tube 5 is converted into a television signal and supplied to a picture tube 11 shown in FIG. A lenticular lens 12 is provided on the image plane of the picture tube 11. A phosphor coating 13 is deposited on the back side of the lenticular lens 12. The picture tube 11 is
A large number of line images are generated by supplying the television signal generated by imaging as described above. By applying these many line images to the left and right eyes of the viewer via the lenticular lens 12, an image corresponding to the subject 7 can be viewed with a three-dimensional effect.

In this example, by wobbling the beam deflection of the picture tube 11, a linear image generated on the phosphor coating 13 of the picture tube 11 is vibrated in the horizontal direction.
That is, as shown in an enlarged view in FIG. 4, two linear images indicated by black circles and two linear images indicated by an "X" horizontally shifted by δ are generated. Wobbling is realized by superimposing a high-frequency alternating current on a sawtooth horizontal deflection current or by changing the average value of the horizontal deflection current for each field or frame.

Due to such wobbling, not only _the positions shown as P _L and P _R in FIG.
Good stereoscopic vision can be achieved even when the left and right eyes are located at the positions indicated by _R ', and the dark zone can be significantly reduced.

In addition to wobbling the beam deflection, as shown in FIG.
2 may be rotated back and forth within a small angular range. In addition to rotation, the lenticular lens 12 may be vibrated in the horizontal direction. Furthermore, the lenticular lens 6 provided on the photoelectric conversion surface of the image pickup tube 5 may be similarly vibrated. In this case, it is also effective to vibrate both the lenticular lenses 6 and 12 and synchronize these vibrations.

Furthermore, if a lenticular lens 12' is used as the lenticular lens 12 provided in the picture tube 11, as shown in FIG. changes in the vertical direction, so that the area in which no stereoscopic images are visible can be substantially reduced.

FIG. 7 shows another embodiment of the invention. In this example, images from the projectors 2a, 2b, and 2c passed through a large-diameter convex lens 1 are reflected by a mirror 14a and presented to the left and right eyes 4L and 4R of the observer 3. The mirror 14a has a regular hexagonal cross section with the other five mirrors 14b to 14f.
f is rotated. By rotating the mirrors 14a to 14f, it is possible to provide good stereoscopic vision over a wide range of areas.

As described above, according to the present invention, it is possible to prevent the image from disappearing when the observer's position moves, and it is possible to simultaneously view the three-dimensional image by many people. The device can be made practical.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of an example of a three-dimensional imaging device, FIG. 2 is a perspective view showing the configuration of an embodiment of the present invention at the time of imaging, and FIG. 3 is a perspective view showing the configuration at the time of image reception. FIG. 4 is an enlarged view used for explaining the present invention, FIGS. 5 and 6 are a perspective view and a plan view, respectively, for explaining another example of the present invention, and FIG. 7 is a further example of the present invention. FIG. 1 is a convex lens; 2a, 2b, and 2c are projectors; 3 is an observer; 5 is an image pickup tube; 6 and 12 are lenticular lenses; and 11 is a picture tube.

Claims (1)

[Claims] 1. A three-dimensional imaging device configured to provide an image having parallax information to the left and right eyes of an observer, in which a main optical path for generating the image is substantially vibrated in the direction of the parallax information.