JPS6343448Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a deflection device using a piezoelectric element that deforms depending on an applied voltage.

Conventionally, a deflection device that combines a movable wire ring and a magnet has been used to deflect wave beams such as light, microwaves, and sound waves. However, this type of deflection device has drawbacks such as a fairly complex structure, large weight, easy failure, and high cost.

The present invention was developed to eliminate these drawbacks, and a reflector is attached to a deformable element that bends and deforms according to an applied signal, and the wave beam is reflected and deflected according to the amount of deformation of the deformable element. The present invention provides a deflection device that has the following characteristics.

Examples of deformable elements used in the present invention include piezoelectric elements using quartz, BaTiO ₃ , etc., and magnetostrictive elements using ferromagnetic materials. A case in which the deflection is performed will be explained.

An embodiment of this invention is shown in FIG. 1 and will be described in detail.

In FIG. 1, 1 is a piezoelectric element, and 2 and 3 are signal terminals, which are attached to both sides of the piezoelectric element 1. 5 and 6 are supports, respectively;
The piezoelectric element 1 is supported at two points with both ends supported. 4
is a reflector, which is attached to one of the supports 5 and 6 of the piezoelectric element 1 . 7 is a light beam, which is reflected by the reflector 4;

However, the piezoelectric element 1 shown in FIG.
When no voltage is applied between the terminals, it is in an undeformed form as shown in Figure 2a, and when a voltage is applied between terminals 2 and 3, it is in the form shown in Figure 2b due to the polarity of terminals 2 and 3.
Alternatively, it may take a modified form as shown in FIG. 2c. Therefore, when a positive or negative voltage is applied between terminals 2 and 3 of the piezoelectric element 1 shown in FIG. 1, the piezoelectric element 1 assumes a deformed form as shown at a or b in FIG. 3. . However, since the reflector 4 performs a rotational movement around the support attached to the piezoelectric element 1, the light beam 7 is reflected by the reflector 4 and then rotates in the direction 1, as shown in FIG.
It will be deflected to 0 or 11. In addition, depending on the deformation of the piezoelectric element 1 used in the present invention, sliding movement in the longitudinal direction occurs at the contact portions between the supports 5 and 6 and the piezoelectric element 1, but the lateral movement of the piezoelectric element 1 due to this sliding movement is , since the deformation width 12 of the piezoelectric element 1 shown in FIG. 3 is usually used in an extremely small range, it can be almost ignored. With this structure, even if the piezoelectric body 1 performs rotational movement at the support points of the supports 5 and 6, the supports 5 and 6 can follow the rotational movement while remaining in close contact with the piezoelectric element 1. ,
The position of the support point on the piezoelectric element 1 is not affected. Furthermore, although the explanation so far has mainly been about light beams, the present invention can be similarly applied to wave beams such as microwaves or sound waves.

As described above, the present invention is a unique deflection device that uses a deformable element that deforms according to the applied signal.
It has great industrial value because it has a simpler structure, is more robust, is lighter, and is less expensive than the conventional movable ring type deflection device.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing an embodiment of this invention, Fig. 2 is an explanatory diagram showing the form of a piezoelectric element that deforms according to applied voltage, and Fig. 3 shows the light produced by the deformation of the piezoelectric element shown in Fig. 1. FIG. 3 is an explanatory diagram showing beam deflection.
Note that the same reference numerals in the figures indicate the same or corresponding parts. 1... Deformation element, 4... Reflector.

Claims (1)

[Scope of utility model registration request] A deformable element that bends and deforms in response to an applied signal; an elastic support that supports the deformable element at two points in a double-sided manner; , a deflection device comprising a reflector that reflects and deflects an incident wave beam according to the amount of deformation thereof.