JPS621288A - Atomic-beam slit - Google Patents

Abstract

PURPOSE:To improve directivity by forming atomic-beam slits by fine holes manufactured through plating and etching. CONSTITUTION:Atomic-beam slits have fine holes 2 acquired through plating and etching. A distance between a plate such as an upper plate 3 and a plate such as a lower plate 4 is kept by three or four arms 5, holes 6 having a diame ter of approximately 0.2mm bored through etching are each formed to the upper plate 3 and the lower plate 4, and wire rods having a wire diameter of approximately 0.2mm are penetrated through the holes 6 toward the lower plate 4 from the upper plate 3. The holes are plated, and spaces shaped by the several dozen wire rods are all filled with a plating material. The whole is cut in proper length, and the wire rods are melted through etching, thus acquiring the slits. Accordingly, the signal/noise ratio of an atomic beam tube can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an atomic beam tube used in a frequency standard device, and more particularly to an atomic beam slit that is a part of the atomic beam tube that emits the atomic beam.

[Conventional technology]

Conventionally, this type of atomic beam slit as shown in FIGS. 3 and 4 is known.

In the conventional example shown in FIG. 3, the metal block 5 has a width of, for example, 0.3 mm.
1111 Several grooves each having a depth of 0.1 cm are formed and the upper plate 6 is pasted thereon.

Further, the conventional example shown in FIG. 4 has a structure in which about three to four corrugated plates 8 and three to four flat plates 9 each are stacked on a metal block 7, and finally a lid 10 is fixed.

[Problem that the invention seeks to solve]

It is clear that the conventional atomic beam slits described above have drawbacks.

That is, the conventional example shown in FIG. 3 has the disadvantage that it is difficult to form a large number of minute grooves, and that the effective area that can be used as a slit is small.

In addition, although the conventional example shown in Fig. 4 has a large effective area, it requires a great deal of effort to manufacture corrugated plates and flat plates and overlap them alternately, and it is difficult to increase the length of the slit in the beam traveling direction. However, corrugated plates and flat plates have the disadvantage that they may be twisted, which may deteriorate the directivity, which is the traditional purpose of atomic beam slits.

[Means for solving problems]

The atomic beam slit of the present invention has minute holes obtained by plating and etching.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the present invention.

For example, if the diameter 0.200 hole 2 is vertical on the upper and lower surfaces,
Several tens of holes extend from the upper surface to the lower surface of the nearly rectangular parallelepiped body 1 with a width of 3 cm and a height of Ion.

FIG. 2 is a diagram illustrating the manufacturing method of the present invention.

For example, the distance between the upper plate 3 and the lower plate 4 is maintained by three to four arms 5. Further, the upper plate 3 and the lower plate 4 each have a hole 6 of about 0 to 2 days formed by etching. A wire rod with a wire diameter of o and zma degrees is passed through it from the upper plate 3 to the lower plate 4. This is then plated so that the space created by the dozens of wires is completely filled with plating material.

By cutting this into a suitable length and melting the wire by etching, a slit as shown in FIG. 1 can be obtained.

〔Effect of the invention〕

As explained above, in the present invention, by manufacturing an atomic beam slit with many minute holes by plating and etching, the effective area can be increased and an accurate straight beam can be obtained. The noise ratio can be improved.

Furthermore, it is clear that a simple atomic beam slit can be obtained at low cost since large-scale equipment and special jigs and tools are not required.

[Brief explanation of the drawing]

gg1 is a diagram showing the atomic beam slit of the present invention, FIG. 2 is a diagram showing the manufacturing method of the atomic beam slit of the present invention, and FIGS. 3 and 4 are perspective views showing the configuration of the conventional atomic beam slit. It is. Lower plate, 5... Arm, 6... Hole, 7.
-・・・Metal block, 8...Corrugated plate, 9...
...Flat plate, 1o...Lid. 11...spot face, 12...hole, 13.
... Hole, 14 ... Plate presser brazing joint, 15 ... Base brazing joint.

Claims (1)

[Claims] An atomic beam slit of an atomic beam emitting unit used in an atomic beam tube of an atomic beam device, characterized in that the atomic beam slit is formed by a minute hole made by plating and etching.