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:
Nov. 04, 2014
Filed:
Jun. 07, 2010
Yoshiaki Yasuno, Tsukuba, JP;
Shuichi Makita, Tsukuba, JP;
Masahide Ito, Tsukuba, JP;
University of Tsukuba, Tsukuba-Shi, JP;
Abstract
The scanning speed of a sample in Doppler OCT, etc., is increased to enable quick measurement of blood flow rate, blood flow volume, etc. Wideband light from a light sourceis linearly polarized by a polarization controllerand this linearly polarized beam is split into vertically polarized light and horizontally polarized light using a Wollaston prismat a sample arm, which are then irradiated simultaneously onto two different locations of the sample in the scanning direction using a galvanometer mirror, and reference light from a reference armand object light from a sample armare merged and caused to interfere with each other, with the resulting interference signal light passed through a diffraction gratingfor spectroscopy, while the horizontal component and vertical component are separated by a polarized beam splitter, to simultaneously measure the components with two polarization-sensitive optical detectorsand thereby obtain two tomography images of the same location at different times by one mechanical scan, thus allowing the amount of temporal change in phase to be measured using the two tomography images.