JPS6128924A - Voltage applying mechanism for electrooptic crystal body - Google Patents

Abstract

PURPOSE:To perform voltage application and driving with high reliability by forming a laminate body by sandwiching an electrooptic crystal body between the 1st and the 2nd conductive blocks, and the 1st and the 3rd conductive blocks for voltage application which face each other having mutually parallel 45 deg. slanting surfaces. CONSTITUTION:The 1st electrooptic crystal body 1 is clamped between one slanting surface 3a of the 1st conductive block 3 and the slanting surface 4a of the 2nd conductive block 4, and the 2nd electrooptic crystal body 2 is sandwiched between the other slanting surface 3b of the 1st conductive block 3 and the slanting surface 5a of the 3rd conductive block 5 which are arrayed oppositely similarly. The 1st electrooptic crystal body 1 is brought into parallel contact with the slanting surfaces 3a and 4a while surfaces where electrodes 1a and 1b are formed are slanted by 45 deg., and the 2nd electrooptic crystal body 2 is brought into parallel contact with the slanting surfaces 3b and 5a similarly while surfaces where electrodes 2a and 2b are formed are slanted by 45 deg.. The laminate assembly of the 1st - the 3rd conductive blocks 3-5 and the 1st and the 2nd electrooptic crystal bodies 1 and 2 is clamped and held in a casing as a holder 6.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a voltage application mechanism for an electro-optic crystal used in an optical path switching mechanism, an optical shutter mechanism, etc. It relates to an assembly of optical crystals.

Parallel electrodes facing a crystal body having an electro-optic effect are provided, and when 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 output.
When no voltage is applied to the crystal, the incident linearly polarized beam is emitted without its polarization direction being changed.

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

This drawback is exacerbated when a pair of electro-optic crystals is used as an element of an optical path switching mechanism or the like.

In the present invention, each of a pair of electro-optic crystals is connected between a first conductive block and a second conductive block for applying a voltage.

The first conductive block and the third conductive block are sandwiched between each other to form a stacked body, and the voltage application mechanism can be easily assembled by simply tightening and holding with a holder etc., and the lead can be easily assembled. Compared to cases such as direct soldering to the electro-optic crystal, metal blowing provides better electrical contact and adhesion between the electro-optic crystal and enables highly reliable voltage application and driving. .

FIG. 1 shows a first embodiment of the invention, and FIG. 2 shows a second embodiment. In each example, 1 and 2 are electro-optic crystals, 3 and 4.5 are conductive blocks for voltage application, and in the second example, 9. lO represents an elastic conductor such as conductive rubber.

The electro-optic crystal 1.2 is formed in the shape of a rectangular parallelepiped, and electrodes 1a are provided on a pair of opposing sides thereof.

It has 1b, 2a, and 2b.

The first conductive block 3 is the first conductive block 3. Second electro-optic crystal 1.2
The second conductive block 4 is a voltage application element dedicated to the first electro-optic crystal l, and the third conductive block 5 is a voltage application element dedicated to the second electro-optic crystal 2. .

The first conductive block 3 is made by cutting its adjacent corner.
5 degree inclined surfaces 3a and 3b are formed. The inclined surfaces 3a, 3b
are tapered inversely to each other and arranged symmetrically.

Both the second conductive block 4 and the third conductive block 5 have a 45-degree inclined surface 4a cut at one corner.

5a is formed.

The second conductive block 4 is arranged so that its sloped surface 4a is parallel to one sloped surface 3a of the first conductive block 3, and the third conductive block 5 is arranged such that its sloped surface 5a is parallel to the other sloped surface 3a of the first conductive block 3. are arranged so as to face each other so as to be parallel to the inclined surfaces 3b.

That is, the inclined surface 4a of the second conductive blower 4 and the inclined surface 5a of the third conductive block 5 are oppositely tapered to each other and are arranged symmetrically, similar to those of the first conductive blower 2 and 3.

For the same purpose, the second. The third conductive blocks 4, 5 are symmetrical as shown.

A first electro-optic crystal l is sandwiched between one inclined surface 3a of the first conductive block 3 disposed facing each other and the inclined surface 4a of the second conductive block 4; The second electro-optic crystal 2 is sandwiched between the other inclined surface 3b of the conductive block 3 and the inclined surface 5a of the third conductive block 5. As a result of the above, the first electro-optic crystal 1 is brought into parallel contact with the inclined surfaces 3a and 4a with the surfaces on which the electrodes 1a and lb are tilted at 45 degrees, and similarly the second electro-optic crystal 2 is brought into contact with the inclined surfaces 3a and 4a in parallel with the electrodes 1a and lb. , 2b is brought into parallel contact with the inclined surfaces 3b and 5a while being inclined at 45 degrees.

The thus formed 1st. Second. third conductive block 3,
4.5 and 1st. The stacked assembly of second electro-optic crystals 1.2 is held tightly in a casing, which is a holder 6.

The holder 6 is formed of a rectangular casing, and the two are indirectly brought into parallel contact through electric bodies 9 and 10 adjacent to each other in the rectangular housing space.

That is, the second embodiment has the basic structure of the first embodiment, but has the inclined surfaces 3a, 4a of the first and second conductive blocks 3, 4 and the electrode 1a of the first electro-optic crystal l, lb
contact interface with the surface, and the first and third conductive blocks 3 and 5
and the electrodes 2a of the second electro-optic crystal 2.
, elastic conductors 9 and 10 such as conductive rubber are interposed at the contact interfaces with surfaces 9 and 2b, respectively. A case is shown in which the same crystal 1.2 is held while compressing lO.

As described above, the first electro-optic crystal element 2 is formed between the first conductive block 3 and the second conductive block 4, and the second electro-optic crystal element 2 is formed between the first conductive block 3 and the third conductive block 5.
It is possible to selectively apply a voltage to each. That is, the first conductive block 3 is connected to one end of the power source, and the second conductive block 3 is connected to one end of the power source. The third conductive blocks 4 and 5 may be connected in parallel to the other end of the power supply so that it can be switched to either one. Third conductive blocks 4 and 5 are arranged, and a second conductive block 4 and 5 are arranged at the same corner portion 7. The right angle portions 4b, 5b of the third conductive blocks 4, 5 facing the inclined surfaces 4a, 5a are fitted and positioned.

Also second. Wall material that supports the back of the third conductive blocks 4 and 5'
The inner surface of the wall material 6b parallel to 6 a supports the back surface of the first conductive block 3 parallel to the inner surface, and the pair of opposing wall materials 6
The first conductive block 3 is assembled by tightening the blocks a and 6b to another pair of opposing wall members 6c and 6d using screws 8 or the like.
The pressing force (component force) is applied to the first and second electro-optic crystals 1 and 2 at the inclined surfaces 3a and 3b, and the inclined surface 4a of the second and third conductive blocks 4.5 is relatively , 5a, both electro-optic crystals 1.2 are held between them with equal clamping force. As a result, the installation state 1 energized state in which the electrode surfaces of both electro-optic crystals 1.2 are inclined at 45 degrees is reliably formed, and the electro-optic crystals 1.2 are firmly fixed in the same state.

In the first embodiment (Fig. 1), when the conductive blocks 3, 4.5 and the electrode surfaces of the electro-optic crystal 1.2 are in direct parallel contact, in the second embodiment (Fig. 2), the elastic conductor As shown in FIG. 0, which shows an example of a adding circuit, another conductive block 11 is arranged between the first and second conductive blocks 4.5, and its negative side is brought into contact with the front surface of the conductive block 3, and the other side is is supported by the wall material 6a.

Also, three pin terminals 12a, 12b are provided on the wall material 6a.

12c are planted at equal intervals with the legs protruding outside the wall material,
The head part is exposed on the inner surface of the wall material 6a, and the second. The third conductive blocks 4 and 5 are brought into surface contact with the intermediate conductive block 11, respectively. Furthermore, a bin terminal 12a.

Connect one end of the power supply E to the leg of 12b, and press the selector switch S.
Switching is possible with W, and the other end of power supply E is connected to pin terminal 1.
Connect to the legs of 2c.

In this way, the first electro-optic crystal element 1 is selectively applied between the first conductive block 3 and the second conductive block 4, and the second electro-optic crystal element 2 is selectively applied between the first conductive block 3 and the third conductive block 5. A voltage can be applied to the

Instead of using the conductive block 11 for forming the circuit, use other connection means, such as the head of the pin terminal 12.
(It is also possible to adopt a mechanism in which the first conductive block 3 is brought into direct contact with the first conductive block 3.

FIG. 3 shows an example of this, in which the bottle terminal 12c in FIG. 1 is implanted in the wall material 6b that supports the conductive block 3,
The case is shown in which the head is exposed to the inner surface of the wall material and brought into contact with the back surface of the conductive block.

Conductive block 1 made of an integral material with other first conductive block 3
A portion corresponding to 2c may be provided.

Further, it is also possible to provide a connector such as a pin terminal integrally with the conductive pro-tuber, and various designs are possible regarding the connection medium with the power source.

According to the present invention, the first conductive block and the second conductive block. The first conductive block is between the third conductive block. A 45-degree inclined assembly of a pair of electro-optic crystals can be easily formed by simply sandwiching the second electro-optic crystal, and at the same time, an assembly ready for voltage application can be easily completed.

Furthermore, according to the present invention, since the connection of each electro-optic crystal element is achieved by the close contact between each inclined surface of each conductive block and the electrode surface, a stable and reliable electrical connection can always be expected, resulting in high reliability. voltage can be applied. Furthermore, the electro-optic crystal can be easily repaired and inspected, and can be constructed in a small size, making it suitable for practical use as a component of an optical path switching mechanism, an optical shutter mechanism, etc. that uses a pair of electro-optic crystals.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing one embodiment of a voltage application mechanism for an electro-optic crystal according to the present invention, and FIG. 2 is another embodiment of the embodiment shown in FIG. 1 in which an elastic conductor is used as a contact element. A sectional view showing an example, FIG. FIG. 3 is a sectional view showing the other U regarding the conductive block for voltage application in the embodiment of FIG. 2; 1.2--electro-optic crystal, la, lb, 2a. 2b... Electrode, 3... First conductive block, 3a, 3
b... Slanted surface, 4... Second conductive block, 4a...
- Inclined surface, 5... Third conductive block, 5a... Inclined surface, 6... Holder, 9.10... Elastic conductor. Figure 1 Figure 2 Figure 3 Procedural amendment

Claims (2)

[Claims] (1) A mechanism for selectively applying a voltage to a first electro-optic crystal and a second electro-optic crystal, the first conductive block and the second conductive block being arranged on a 45-degree inclined surface parallel to each other. At the same time, the first conductive block and the third conductive block are arranged facing each other with parallel 45-degree inclined surfaces, and between the facing inclined surfaces of the first conductive block and the second conductive block, A first electro-optic effect element is sandwiched, and a second electro-optic effect element is sandwiched between the opposing inclined surfaces of the first conductive block and the third conductive block. 1. A voltage application mechanism for an electro-optic effect element, characterized in that a voltage is selectively applied to a second electro-optic crystal element between a first conductive block and a third conductive block. . (2) In the invention as set forth in claim 1, the electro-optical device is characterized in that the one opposing inclined surface and the other opposing inclined surface are arranged so as to be symmetrical with each other and tapered inversely. Voltage application mechanism for crystals.