The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 16, 2022
Filed:
Aug. 30, 2019
National Institute of Advanced Industrial Science and Technology, Tokyo, JP;
Abstract
The purpose of the present invention is to provide a particulate observation device using light scattering, which includes a means for determining the three-dimensional position of a particle, and can measure an accurate particle size or impart various properties of same. The present invention is characterized by including a position determination means which captures, with an optical microscope, an image of light scattered from particles in a dispersion medium to which laser light is emitted, and determines a three-dimensional position of each particle from the obtained two dimensional image, wherein the position determination obtains two-dimensional coordinates along the two-dimensional image from luminescent point positions of the particles, and determines the depth position along a coordinate axis vertical to the two-dimensional image from the diameters of diffraction fringes of the luminescent points.