JPS6114622A - Mechanism for applying voltage to electro-optical crystal body - Google Patents

Abstract

PURPOSE:To apply voltage to an electro-optical crystal body with high reliability by holding the crystal body between metallic blocks for applying voltage, putting an elastic conductor on the interface between each of the blocks and the crystal body, and uniting them to one body. CONSTITUTION:The electro-optical crystal body 1 is a rectangular solid and has electrodes 1a, 1b on two confronting sides. Metallic blocks 2, 3 have planes 2a, 3a corresponding to the surfaces of the electrodes, respectively. The crystal body 1 is held between the blocks 2, 3, and sheetlike electrically conductive rubber 4, 5 is put on the interface between each of the blocks 2, 3 and the crystal body 1 to form a piled body in which the planes 2a, 3a of the blocks 2, 3 are in close contact with the electrode surfaces 1a, 1b, respectively. The piled body is fastened tightly with a desired holder 6. The rubbers 4, 5 are compressed on the interfaces and produce a satisfactory contact state by the elasticity restoring force. At the same time, the rubbers make the fastening with the holder 6 perfect. By this mechanism, voltage is applied with high reliability.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a voltage application mechanism for an electro-optic crystal used in an optical path switching mechanism, an optical shutter mechanism, or the like.

When parallel electrodes facing a crystal body having an electro-optic effect are provided and a predetermined half-wave voltage is applied, the polarization direction of a linearly polarized beam incident on the crystal body is converted by 90 degrees, and the beam can be emitted.

Furthermore, when no voltage is applied to the crystal, the incident linearly polarized beam is emitted without its polarization direction being changed.

If the 41 ft'l of the electro-optic crystal described in 1- is used, for example, an analyzer that passes only the linearly polarized beam whose polarization power direction has been switched in 1- is placed on the light exit side of the electro-optic crystal. It is possible to configure a light ON/OFF switch, a light shutter, or the like.

As a voltage application mechanism, a mechanism in which voltage application lead wires are soldered to electrode layers provided on a pair of opposing sides of an electro-optic crystal lacks reliability, does not allow for homogeneity of the product, and lacks ease of assembly.

The present invention makes it possible to easily assemble a voltage application mechanism by simply sandwiching an electro-optic crystal between a pair of voltage application metal blocks to form a stacked body and holding it tightly with a holder, etc. The adhesion between the metal block and the electro-optic crystal is improved by interposing an elastic conductor having elasticity at the contact interface between each metal block and the electro-optic crystal to form the above-mentioned superimposed body. ,
The above-mentioned overlapping tightening allows highly reliable voltage application and driving, and is structured so that a strong assembly can be easily obtained.

FIG. 1 shows a basic embodiment of the invention.

In the figure, 1 is an electro-optic crystal, 2.3 is a metal block for voltage application, and 4.5 is an elastic conductor such as conductive rubber (
(hereinafter referred to as conductive rubber).

The electro-optic crystal 1 is formed in the shape of a rectangular parallelepiped, and has electrodes 1a and lb provided on opposite pairs of sides.

The metal blocks 2 and 3 are rectangular parallelepiped blocks having flat portions 2a and 3a corresponding to at least the -1- distribution electrode surface on the right side. As shown in the diagram -1-Note- Pair of metal blocks 2 and 3
The electro-optic crystal 1 is sandwiched between them, and a sheet-shaped conductive rubber 4.5 is interposed at the contact interface between the l-reporter metal blocks 2 and 3 and the electro-optic crystal 1 to form one side of the metal block 2.3. and the electrode surfaces 1a, lb of the electro-optic crystal l are in close contact to form a stacked body. The stacked body is tightened and held by an arbitrary holder 6 to be integrated.

By tightening the conductive rubber 4, 5, the metal blocks 2, 3
It is compressed at the contact interface between the electro-optic crystal l and the electro-optic crystal l, and its elastic restoring force forms a better adhesion T; at the same time, it makes the tightening by the holder 6 perfect, and makes the stacked body more compact. Make it strong.

Improving the adhesion between the metal blocks 2 and 3 and the electro-optic crystal l makes the application of voltage through the adhesion surfaces and the driving of the crystal l by the voltage application more stable, and improves its performance. to be highly reliable.

The present invention also includes a case where a conductive rubber is interposed at the contact interface between the metal blocks 2, 3 and the electro-optic crystal l.

The same applies below.

FIG. 2 shows a second embodiment of the invention.

A metal block 2 for voltage application shaped like a rectangular parallelepiped as shown in the figure.
．． Cut the corners of 3 to form 45-degree inclined surfaces 2b and 3b, arrange the meat slopes 2b and 3b to be parallel to each other, and sandwich the electro-optic crystal l between the meat slopes 2b and 3b. .

The electro-optic crystal 1 has a rectangular parallelepiped shape, and electrodes 1a and lb are provided on a pair of opposing surfaces. The electro-optic crystal 1 is held between inclined surfaces 2b and 3b of metal blocks 2 and 3 with the surfaces on which the electrodes 1a and lb are formed inclined at 45 degrees.

-1- The contact interface between each metal block 2.3 and the electro-optic crystal l arranged as described above, that is, the inclined surface 2b.

The conductive rubber 4.5 is placed on the contact interface between electrode 3b and electrodes 1a and lb.
are used to apply a voltage through the conductive rubbers 4 and 5, and the stacked body thus formed is tightened and integrated by a holder 6.

The holder 6 is formed by a rectangular framed casing, and has corner portions 2c diagonally at right angles to the inclined surfaces 2b and 3b of the metal blocks 2 and 3 at some of its corners that form a right angle on a pair of diagonals. , 3c are fitted, and both metal blowers 2 and 3 are positioned diagonally -■- to maintain the electro-optic crystal l relatively inclined at 45 degrees.

``One opposing wall material 6c is arranged so as to be in contact with one surface forming the corner portions 2c and 3c of the metal blocks 2 and 3, and in contact with the other surface forming the corner portions 2c and 3c. The other opposing wall material 6b is placed, and the casing serving as the holder 6 is assembled by screwing the wall materials 6C and 6b together.

By this assembly, the conductive rubbers 4 and 5 are compressed, and the metal blocks 2 and 3 and the electro-optic crystal 1 are brought into close contact and integrated.

A pin terminal 8 is implanted in the wall 6c forming the casing, with its legs protruding outside the casing to enable connection to a power source, and its head contacting the angular surface of the metal block 2.3.

A voltage is thus applied between the metal blocks 2 and 3, and is applied to the electro-optic crystal l via the conductive rubber 4.5.

FIG. 3 shows a third embodiment of the invention.

This embodiment shows a case where voltage can be applied alternately to two electro-optic crystals 1.1.

As shown in the figure, the four
The 5-degree inclined surfaces 2 b ′ and 2 b ″ are formed so as to be symmetrically inversely tapered, and the rectangular parallelepiped-shaped metal block 3 ′ has 45-degree inclined surfaces at the corners as in the second embodiment. Prepare two metal blocks 3'. Arrange one metal block 3' so that its inclined surface 3b' faces parallel to one inclined surface 2b' of metal block 2', and similarly arrange the other metal block 3' with its inclined surface 3b' facing parallel to one inclined surface 2b' of metal block 2'. Surface 3b' is inclined surface 2 of metal block 2'
Therefore, the electro-optic crystal l is sandwiched between the inclined surface 3b' of each metal prong 3' and each inclined surface 2b', 2b of the metal block 2'. , electro-optic crystal l and metal block 2
The conductive rubber 4, 5 is attached to each contact interface (4 locations) of ', 3'.
each inclined surface 2b' of the metal blocks 2', 3'
, 2b'', 3b' and the electrodes 1a, lb of the electro-optic crystal 1
The structure is such that they are in contact with each other through conductive rubber 4.5.

The thus formed overlapping assembly of the metal blocks 2', 3', the electro-optic crystal l, and the conductive rubbers 4, 5 is held in a casing serving as a holder 6 by tightening.

The holder 6 has a structure similar to that of the second embodiment, and has a rectangular housing space with a holder 6 in a part of an adjacent right angle corner.
The two metal blocks 3' are arranged, and the right angle portions facing the inclined surfaces 3b' are curved in a part of the corners and positioned.

The flat surface opposite to the inclined surface of the metal block 2' is supported at the center of the inner surface of the wall material 6c that is parallel to the wall material 6C on the corner forming surface side of the other metal block 3', and the wall material 6c is pressed against the metal block 2' by tightening it to the wall material 6b with the screw 7, and the pressing force (component force) is applied to the inclined surface 2b.
', 2b' to the conductive rubbers 4, 5 and the electro-optic crystal l, and the metallic inclined surface 3b' to stop the reception.

As a result, equal pressure is applied from the metal block 2' to the two electro-optic crystals l, appropriately compressing the conductive rubbers 4 and 5, achieving good adhesion, and achieving a strong and rigid packaging. Enables stable and highly reliable voltage application and crystal drive. Additionally, an assembly with such performance is easily obtained.

In Fig. 3, a metal block 9 is placed between two metal blocks 3', its lower side is supported by the center of one metal block 2', and the other side is supported by a wall supporting the other metal block 3'. It is supported on the inner surface of the material 6c.

Furthermore, three wooden pin terminals 10a are attached to the 1V material 6c.

10b and 10c are implanted at equal intervals, their legs protrude outside the wall material 6C, and their heads are exposed on the inner surface of the wall material 6c,
Metal blocks 3', 3' at both ends and metal block 9 in the center
make face-to-face contact with each other.

In order to form an energizing circuit, one end of a power source E is connected in parallel to the bin terminals 10a and 10b, which can be switched by a switch SW, and the other end of the power source E is connected to the bin terminal 10c.

Thus, from the metal block 9.2', the electro-optic crystal l,
A voltage application circuit extending to the metal block 3' and a voltage application circuit extending from the metal block 2' to the other electro-optic crystal l and the other metal block 3' are formed, and each circuit can be switched by a switch SW. A mechanism is formed.

1-Turn on the two electro-optic crystals 1 alternately according to the description.
, OF Fftj control voltage application mechanism is extremely simple and can be assembled rationally by implementing the present invention.

In addition, the metal blocks 2, 3, 2', 3' for voltage application and the electro-optic crystal l are always kept stable at rated II level through an elastic conductor such as conductive rubber 4 or 5 at the contact interface of at least one of them. A close connection can be obtained and a highly reliable voltage application mechanism can be provided.

Unlike the case where the metal block and the electro-optic crystal are brought into direct contact, the contact surface is not required to have very precise flatness, and pressurization is easy.

4. Cold assembly is easy, and by interposing an elastic conductive wall at the contact interface, elastic tightening can be performed properly, and the stacked bodies can be properly integrated.The present invention The voltage application mechanism (
It can be suitably put to practical use as a drive mechanism.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a first embodiment of the voltage application mechanism of the present invention, FIG. 2 is a sectional view showing the second embodiment, and FIG. 3 is a sectional view showing the third embodiment. ■...Electro-optic crystal, 2, 3.2', 3'. 9... Metal block for voltage application, 4, 5... Conductive rubber, 6... Holder. Figure 1 Figure 2 No? C6C q b71 JP-A-6L-14G22 (4) Third diagram 2N no! ≠Ma,■

Claims (1)

[Claims] An electro-optic crystal body is characterized in that an electro-optic crystal body is sandwiched between a pair of metal blocks for voltage application, and an elastic conductor is interposed at the contact interface between at least one of the metal blocks and the electro-optic crystal body. Voltage application mechanism.