MAGNETIC MEASURING DEVICE

• US 20160313408A1
• Filed: 04/13/2016
• Published: 10/27/2016
• Est. Priority Date: 04/21/2015
• Status: Abandoned Application

• Current Assignee: Renesas Electronics Corporation
• Original Assignee: Renesas Electronics Corporation
• Inventors: HATANO, Yuji, UENO, Jun, YOSHINO, Takashi
• Application Number:
  US15/098,136
• Publication Number:
  US 20160313408A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01R 33/032 using magneto-optic devices, e.g. Faraday or Cotton-Mouton effect
• CPC Class Codes: G01R 33/1284 Spin resolved measurements; Influencing spins during measurements, e.g. in spintronics devices G01R33/093 takes precedence; semiconductor devices using spin polarized carriers H01L29/66984

Abstract

A magnetic measuring device can be downsized. The magnetic measuring device includes a diamond crystal, a microwave source, a light source array/microwave circuit chip, an image sensor, and a signal controller. The diamond crystal contains a plurality of nitrogen-vacancy pairs. The microwave source generates the microwave that is irradiated to the diamond crystal. The microwave circuit unit in the light source array/microwave circuit chip irradiates the diamond crystal with the microwave. The light source array in the light source array/microwave circuit chip irradiates the diamond crystal with excitation light. The image sensor detects an intensity of fluorescent light generated from the diamond crystal. The signal controller performs image processing of a fluorescent image taken-in by the image sensor, and controls operations of the light source array/microwave circuit chip and the microwave source. The light source array/microwave circuit chip is provided on a first surface side of the diamond crystal, and the image sensor is provided on a second surface side opposed to the first surface of the diamond crystal.

Claims

1. A magnetic measuring device for detecting a magnetic field intensity from a change of a fluorescent light intensity, comprising:

a diamond crystal having a plurality of nitrogen-vacancy pairs;

a microwave unit irradiating the diamond crystal with a microwave;

a light source unit irradiating the diamond crystal with excitation light;

an image sensor detecting a fluorescent light intensity generated from the diamond crystal by a plurality of pixels;

a signal processing unit performing image processing of a fluorescent image taken-in by the image sensor; and

a control unit controlling an operation of the light source unit, the microwave unit, and the signal processing unit,

wherein the light source unit is provided on a first surface side of the diamond crystal, and

the image sensor is provided on a second surface side opposed to the first surface of the diamond crystal.

2. The magnetic measuring device according to claim 1,

wherein an optical filter which reflects excitation light which the light source unit irradiates with, and which makes fluorescent light generated from the diamond crystal reach the image sensor is included between the diamond crystal and the image sensor.

3. The magnetic measuring device according to claim 1,

wherein the diamond crystal is a polycrystalline thin film deposited by a vapor deposition process.

4. The magnetic measuring device according to claim 1,

wherein the diamond crystal is diamond fine powder, and

the diamond fine powder is arranged so as to correspond to each of the pixel included in the image sensor.

5. The magnetic measuring device according to claim 1,

wherein the light source unit includes a plurality of light-emitting units, and

each of a plurality of the light-emitting units is provided so as to correspond to the pixel included in the image sensor.

6. The magnetic measuring device according to claim 5,

wherein the light-emitting unit included in the light source unit is a semiconductor laser.

7. The magnetic measuring device according to claim 5,

wherein the control unit individually controls each light emission of the plurality of light-emitting units included in the light source unit.