Quantum interference device, atomic oscillator, electronic apparatus, and moving object

Patent metadata

Field	Value
Publication number	US-9319056-B2
Application number	US-201414574970-A
Country	US
Kind code	B2
Filing date	Dec 18, 2014
Priority date	Dec 20, 2013
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

A quantum interference device includes a gas cell into which metal atoms are sealed, a heater that heats the gas cell, a heat transmission portion that is located between the gas cell and the heater, is connected to the gas cell, and transmits heat generated from the heater to the gas cell, and a heat dissipation portion that is connected to the gas cell so as to be spaced apart from the heat transmission portion, and dissipates heat of the gas cell.

First claim

What is claimed is:

1. A quantum interference device comprising:
a gas cell into which metal atoms are sealed;
a heating portion that heats the gas cell;
a heat transmission portion that is located between the gas cell and the heating portion, that is connected to a first part of the gas cell, and that transmits heat generated from the heating portion to the gas cell; and
a heat dissipation portion that is connected to a second part, which is different from the first part, of the gas cell, wherein
the heat transmission portion and the heat dissipation portion are spaced apart from each other by a gap.

2. The quantum interference device according to claim 1 , wherein the heat dissipation portion is disposed on an opposite side to the heating portion side of the gas cell.

3. The quantum interference device according to claim 2 , wherein the gas cell includes a pair of windows through which light is transmitted in part of the first part, and
wherein the heat transmission portion is connected to each of the windows.

4. The quantum interference device according to claim 1 , further comprising:
a coil that generates a magnetic field in the gas cell,
wherein the heat transmission portion, the gas cell, and the heat dissipation portion are located inside the coil, and
wherein the heating portion is located outside the coil.

5. The quantum interference device according to claim 4 , further comprising:
a magnetic shield that has a magnetic shield property and that is located between the coil and the heating portion.

6. The quantum interference device according to claim 5 , wherein the heating portion is connected to the magnetic shield.

7. The quantum interference device according to claim 1 , wherein an end of the heat transmission portion on the heat dissipation portion side and an end of the heat dissipation portion on the heat transmission portion side face each other, and have facing areas different from each other.

8. An atomic oscillator comprising the quantum interference device according to claim 1 .

9. An electronic apparatus comprising the quantum interference device according to claim 1 .

10. A moving object comprising the quantum interference device according to claim 1 .

Assignees

• Seiko Epson Corp

Inventors

• Chindo Koji

Classifications

• H03L7/26 Primary

  using energy levels of molecules, atoms, or subatomic particles as a frequency reference · CPC title

• G04F5/14

  using atomic clocks · CPC title