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Title: Fluorescent image tracking velocimeter

Abstract

A multiple-exposure fluorescent image tracking velocimeter (FITV) detects and measures the motion (trajectory, direction and velocity) of small particles close to light scattering surfaces. The small particles may follow the motion of a carrier medium such as a liquid, gas or multi-phase mixture, allowing the motion of the carrier medium to be observed, measured and recorded. The main components of the FITV include: (1) fluorescent particles; (2) a pulsed fluorescent excitation laser source; (3) an imaging camera; and (4) an image analyzer. FITV uses fluorescing particles excited by visible laser light to enhance particle image detectability near light scattering surfaces. The excitation laser light is filtered out before reaching the imaging camera allowing the fluoresced wavelengths emitted by the particles to be detected and recorded by the camera. FITV employs multiple exposures of a single camera image by pulsing the excitation laser light for producing a series of images of each particle along its trajectory. The time-lapsed image may be used to determine trajectory and velocity and the exposures may be coded to derive directional information.

Inventors:
 [1]
  1. (Library, PA)
Issue Date:
Research Org.:
Pittsburgh Energy Technology Center
OSTI Identifier:
869413
Patent Number(s):
5333044
Assignee:
United States of America as represented by Department of Energy (Washington, DC) OSTI
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
fluorescent; image; tracking; velocimeter; multiple-exposure; fitv; detects; measures; motion; trajectory; direction; velocity; particles; close; light; scattering; surfaces; follow; carrier; medium; liquid; gas; multi-phase; mixture; allowing; observed; measured; recorded; main; components; pulsed; excitation; laser; source; imaging; camera; analyzer; fluorescing; excited; visible; enhance; particle; detectability; near; filtered; reaching; fluoresced; wavelengths; emitted; detected; employs; multiple; exposures; single; pulsing; producing; series; images; time-lapsed; determine; coded; derive; directional; information; carrier medium; excitation laser; visible laser; light scattering; laser light; laser source; camera image; multi-phase mixture; particle image; phase mixture; fluorescent particles; tracking velocimeter; fluorescent image; image tracking; near light; scattering surface; /356/250/600/

Citation Formats

Shaffer, Franklin D. Fluorescent image tracking velocimeter. United States: N. p., 1994. Web.
Shaffer, Franklin D. Fluorescent image tracking velocimeter. United States.
Shaffer, Franklin D. Sat . "Fluorescent image tracking velocimeter". United States. https://www.osti.gov/servlets/purl/869413.
@article{osti_869413,
title = {Fluorescent image tracking velocimeter},
author = {Shaffer, Franklin D.},
abstractNote = {A multiple-exposure fluorescent image tracking velocimeter (FITV) detects and measures the motion (trajectory, direction and velocity) of small particles close to light scattering surfaces. The small particles may follow the motion of a carrier medium such as a liquid, gas or multi-phase mixture, allowing the motion of the carrier medium to be observed, measured and recorded. The main components of the FITV include: (1) fluorescent particles; (2) a pulsed fluorescent excitation laser source; (3) an imaging camera; and (4) an image analyzer. FITV uses fluorescing particles excited by visible laser light to enhance particle image detectability near light scattering surfaces. The excitation laser light is filtered out before reaching the imaging camera allowing the fluoresced wavelengths emitted by the particles to be detected and recorded by the camera. FITV employs multiple exposures of a single camera image by pulsing the excitation laser light for producing a series of images of each particle along its trajectory. The time-lapsed image may be used to determine trajectory and velocity and the exposures may be coded to derive directional information.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}

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