STANDARD DEVICE FOR ORIGIN OF LIGHT ABSORBANCE AND METHOD OF USING THE SAME

• US 20090231585A1
• Filed: 08/27/2008
• Published: 09/17/2009
• Est. Priority Date: 03/12/2008
• Status: Active Grant

• Current Assignee: Shimadzu Corporation
• Original Assignee: Shimadzu Corporation
• Inventors: Tsuneishi, Shoichi, Kohno, Satoru
• Granted Patent: US 7,675,623 B2
• Time in Patent Office: Days
• US Class Current: 356/432
• CPC Class Codes: G01N 21/4785 Standardising light scatter apparatus; Standards therefor
• CPC Class Codes: G01N 21/4795 spatially resolved investigating of object in scattering medium in vivo A61B

Abstract

A device for origin of light absorbance used in an optical measuring instrument for measuring light absorption characteristics of a light diffusion sample. The device includes a light transmission terminal configured to irradiate a measurement light onto the light diffusion sample at a point of incidence of the light diffusion sample and a light diffusion plate through the interior of which the measurement light can be diffused and transmitted. A light receiving terminal is configured to receive the measurement light from the light diffusion sample for measurement at a point of detection of the light diffusion sample that is separate from the point of incidence. Optionally, the device can include a cleaning unit that cleans the light transmission terminal and light receiving terminal.

Claims

1. A device for origin of light absorbance used in an optical measuring instrument for measuring light absorption characteristics of a light diffusion sample, comprising:

a light transmission terminal configured to irradiate a measurement light onto the light diffusion sample at a point of incidence of the light diffusion sample;

a light diffusion plate through the interior of which the measurement light can be diffused and transmitted,

a light receiving terminal configured to receive the measurement light from the light diffusion sample for measurement at a point of detection of the light diffusion sample, the point of detection being separate from the point of incidence; and

a cleaning unit that cleans the light transmission terminal and light receiving terminal.

2. The device for origin of light absorbance according to claim 1 wherein the cleaning unit includes

a cleaning tank formed by a plurality of side walls and a bottom surface, the bottom surface including the light diffusion plate,

a cleaning solution that contained within the cleaning tank, and

an ultrasonic transducer that generates ultrasonic vibrations in the cleaning solution.

3. The device for origin of light absorbance according to claim 1 wherein the cleaning unit includes a fabric laminated on the surface of said light diffusion plate.

4. The device for origin of light absorbance according to claim 3 further comprising a drive mechanism configured to rotate the laminated fabric relative to the light transmission terminal and the light receiving terminal.

5. A method of using a device for origin of light absorbance used in an optical measuring instrument for measuring light absorption characteristics of a light diffusion sample, the method comprising

filling a cleaning tank at least partially with a cleaning solution, the cleaning tank formed by a plurality of side walls and a bottom, the bottom including a surface of the light diffusion plate;

immersing in the cleaning solution a light transmission terminal and a light receiving terminal,

generating ultrasonic vibrations in the cleaning solution using an ultrasonic transducer so as to remove contaminations from the light transmission terminal and the light receiving terminal,

irradiating a measurement light from the light transmission terminal at a point of incidence of the light diffusion sample and through the light diffusion plate, the light diffusion plate diffusing and transmitting the measurement light;

receiving at the light receiving terminal the measurement light reflected from a point of detection of the light diffusion sample, the point of detection being separate from the point of incidence; and

measuring at said light receiving terminal the measurement light irradiated from said light transmission terminal into the interior of the light diffusion plate, through the interior of said light diffusion plate, and reflecting from and exiting to the exterior of the light diffusion plate.

6. A method of using a device for origin of light absorbance used in an optical measuring instrument for measuring light absorption characteristics of a light diffusion sample, the method comprising

filling a cleaning tank with a cleaning solution, the cleaning tank formed by a plurality of side walls and a bottom, a bottom including a surface of the light diffusion plate;

immersing in the cleaning solution a light transmission terminal and a light receiving terminal,

generating ultrasonic vibrations in the cleaning solution using an ultrasonic transducer so as to remove contaminations from the light transmission terminal and the light receiving terminal,

rotating a drive mechanism configured to rotate a laminar body of a fabric and a light diffusion plate,

bringing the light transmission terminal and the light receiving terminal into contact with the fabric surface during the rotation of the drive mechanism,

irradiating a measurement light from the light transmission terminal at a point of incidence of the light diffusion sample and through the light diffusion plate, the light diffusion plate diffusing and transmitting the measurement light;

receiving at the light receiving terminal the measurement light reflected from a point of detection of the light diffusion sample, the point of detection being separate from the point of incidence; and

measuring at said light receiving terminal the measurement light irradiated from said light transmission terminal into the interior of the light diffusion plate, through the interior of said light diffusion plate, and reflecting from and exiting to the exterior of the light diffusion plate.