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:
Dec. 07, 2021
Filed:
Jul. 18, 2018
Hiroshi Ogawa, Yokohama, JP;
Hiroshi Ogawa, Yokohama, JP;
Other;
Abstract
A tomographic imaging device includes a light source, a light pulse generator, a wave shaper, a splitter, a frequency shifter, a light path length changer, an optical detector, filters, a demodulator and an analyzer. The light pulse generator generates an optical pulse train from an output of the light source. The wave shaper modulates the optical pulse train by binary phase shift keying with PN codes. The splitter splits the pulse train into two signals, one is shifted by the frequency shifter, and one has a path length changed by the light path length changer. The optical detector inputs back scattered light from an object and the signal whose length has changed, and generates a difference signal. The filters filter the difference signals, and the demodulator demodulates the filter outputs. The analyzer calculates a reflection site of the measurement object by analyzing the output signal of the demodulator.