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US 2017/0363695 A1Published application
Magnetic field measuring device and method for manufacturing magnetic field measuring device
AssigneeSeiko Epson Corporation
InventorHitoshi UENO
Life of this patent
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Abstract
A magnetic field measuring device includes: a first cell and a second cell in which alkali metal atoms are entrapped and which are disposed in this order in a sensing direction of a magnetic field; a first reflective mirror, a second reflective mirror, and an autocollimator as an optical axis detector. Beam light as second polarized light and beam light as fourth polarized light, which are detected by the autocollimator, have orientations of optical axes in the same direction.
Claims9
A magnetic field measuring device comprising:
- a light irradiator that performs irradiation with linearly polarized light;
- a first cell and a second cell in which alkali metal atoms are entrapped and which are disposed in this order in a sensing direction of a magnetic field;
- a first light branching element that causes the linearly polarized light to branch into first polarized light which is incident to the first cell and second polarized light which is parallel to the first polarized light;
- and
- a second light branching element that causes the linearly polarized light to branch into third polarized light which is incident to the second cell and fourth polarized light which is parallel to the third polarized light,
- wherein a position of the second cell is adjusted with respect to the first cell such that an orientation of an optical axis of the second polarized light and an orientation of an optical axis of the fourth polarized light are the same direction.
3 more elements
A method for manufacturing a magnetic field measuring device that includes
- a light irradiator that performs irradiation with linearly polarized light,
- a first cell and a second cell in which alkali metal atoms are entrapped,
- a first light branching element that causes the linearly polarized light to branch into first polarized light which is incident to the first cell and second polarized light which is parallel to the first polarized light, and
- a second light branching element that causes the linearly polarized light to branch into third polarized light which is incident to the second cell and fourth polarized light which is parallel to the third polarized light,
- the method comprising:
- disposing the first cell and the second cell in this order in a sensing direction of a magnetic field;
- detecting an orientation of an optical axis of the second polarized light and an orientation of an optical axis of the fourth polarized light;
- and
- adjusting a position of the second cell with respect to the first cell such that the orientation of the optical axis of the second polarized light and the orientation of the optical axis of the fourth polarized light are the same direction, based on the result of the detecting of the optical axis.
6 more elements
Dependencies are inferred from the claim text.