Method for measuring the velocity of particles in a fluid medium in motion
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 18, 2003
Grant Date -
Oct 31, 2002
app pub date -
Jul 12, 2001
filing date -
Jul 14, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method measures the three dimensional position of particles in a fluid medium contained in a sample by recording a digital hologram of the particles on an image sensor and by reconstructing the image of the particles from the hologram. The recording includes providing a source beam with a coherent source, and generating at least two beams from the source beam, namely a reference beam and at least one object beam, wherein the reference beam and the object beam are mutually coherent. The sample is illuminated by condensing the object beam onto the sample in order to obtain a scattered object beam for each particle. The scattered object beam is scattered into a spherical converging object beam toward the image sensor for each particle. Further, the recording includes forming a diverging spherical beam from the reference beam, and superposing the spherical converging object beam for each particle and the diverging spherical beam on the image sensor in order to obtain on the image sensor an hologram of the particles by interfering the beams.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully