JPS6237371B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a stereo glasses device for obtaining a stereoscopic image by viewing left and right images of the same visible object alternately in time.

This type of stereo glasses device has an electronic shutter element placed in front of the left and right eyes, which is made by sandwiching two polarizing plates with mutually orthogonal polarization axes on the front and back sides of a solid flat plate that has an electro-optic effect. However, by opening and closing the electronic shutter element in synchronization with the display cycle of the left and right images, the left and right images are fused within a certain period of time so that a single stereoscopic image can be viewed. As a solid flat plate having such an electro-optic effect, a translucent piezoelectric ceramic, abbreviated as PLZT, which has a predominant Kerr effect, or a piezoelectric single crystal plate, which has a predominant Pockels effect, is used. Interdigital finger-shaped electrodes are provided on the front and back sides of the electronic shutter element, and the length direction of the finger-shaped electrodes is arranged diagonally to the direction of the polarization axis of the polarizing plate. The Kerr effect in translucent piezoelectric ceramics includes one that utilizes the phenomenon of forced and reversible phase transition from an antiferroelectric phase to a ferroelectric phase when an electric field is applied.) .

Conventionally, the electronic shutter element in such a stereo glasses device has only had polarizing plates attached directly to the front and back sides of a solid flat plate that has the Kerr effect or Pockels effect, so the electronic shutter element itself has low weather resistance and is easy to use for nearsighted people. There is a problem in that people with abnormal vision, such as hyperopes and farsighted people, must also wear glasses for vision correction.

The purpose of the present invention is to solve these problems by developing an electronic shutter device that is composed of a solid flat plate having an electro-optic effect, which is the main element of an electronic shutter element, interdigital electrodes having lead wires, and a polarizing plate. It is an object of the present invention to provide a stereo glasses device in which the elements are embedded in a plastic lens body.

Next, the stereo glasses device of the present invention will be explained based on examples. FIG. 1 is a plan view showing an embodiment of the stereo glasses device according to the present invention, and FIG. 2 is a sectional view taken along line AA in FIG. 1. In the figure, 1 is a solid flat plate having an electro-optic effect, 2 and 2' are interdigital electrodes provided on the front and back sides of the solid flat plate 1, and 3, 3' and 4, 4' are interdigital electrodes 2. , 2' power supply terminal, 5
and 6 are polarizing plates or polarizing films whose polarization axes maintain a minimum angle of 45° with the length direction of the interdigital electrodes and are closely disposed orthogonal to each other. The aforementioned power supply terminals 3 and 3' and power supply terminals 4 and 4' electrically connect each of the interdigital electrodes 2, 2 and 2', 2' on the front and back sides of the solid flat plate 1, respectively. , are connected to lead wires 7 and 8 for applying positive and negative voltages. The power supply terminals 3, 3' and the power supply terminals 4, 4' are electrically insulated.

The electronic shutter element member configured in this way is made of a commercially available colorless and transparent thermosetting resin material 9 that does not corrode the solid flat plate 1, interdigital electrodes 2, 2', power supply terminals 3, 3', etc. The lens is embedded in the lens and shaped into a predetermined shape, either into a concave lens shape as shown in FIG. 3 or a convex lens shape (not shown). In this case, it is also possible to apply a molding method or a grinding method. Note that the holes through which the lead wires 7 and 8 are passed may be formed in advance using a mold or the like during molding, or the connection between the power supply terminals 4 and 4' and the lead wires 7 and 8 may be made by thermosetting the electronic shutter element member. This may be carried out before the embedding work into the plastic material 9, and then the embedding molding may be carried out.

As explained above, in the stereo glasses device based on the present invention, the electronic shutter element member can be embedded in a thermosetting resin and molded into a desired shape, so the plastic lens can be constructed using this thermosetting resin. As a result, it is possible to provide a stereo glasses device suitable for the diopter of myopic and hyperopic people, and since the electronic shutter element member is embedded in a thermosetting resin, the weather resistance of the electronic shutter element member can be improved. and can improve mechanical strength. Furthermore, the viscoelasticity of the thermosetting resin has the effect of reducing vibration noise generated based on the electrostrictive effect of the solid flat plate.

[Brief explanation of the drawing]

1 is a plan view showing an embodiment of the stereo glasses device according to the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is a stereo glasses device according to the present invention. FIG. 7 is a sectional view showing another embodiment of the eyeglass device. 1...solid flat plate, 2,2'...interdigital electrode,
3, 3', 4, 4'... Power supply terminal, 5, 6... Polarizing film, 7, 8... Lead wire, 9... Thermosetting resin.

Claims (1)

[Scope of Claims] 1. A solid flat plate having an electro-optic effect, interdigital electrodes formed on the front and back sides of the solid flat plate, and a polarizing plate or polarizing film provided in close contact with the interdigital electrodes. What is claimed is: 1. A stereo glasses device characterized in that an electronic shutter element member is embedded in a translucent thermosetting resin and shaped into a plastic lens body. 2. The stereo glasses device according to claim 1, wherein the plastic lens body is finished into a flat plate shape. 3. The stereo glasses device according to claim 1, wherein the plastic lens body is finished in the shape of a concave lens or a convex lens.