Calibration of optical particle-size analyzer

Patent · Mon Jan 01 00:00:00 EST 1979

OSTI ID:863268

Pechin, William H ^[1]; Thacker, Louis H ^[2]; Turner, Lloyd J ^[1]

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1. Oak Ridge, TN
2. Knoxville, TN

This invention relates to a system for the calibration of an optical particle-size analyzer of the light-intercepting type for spherical particles, wherein a rotary wheel or disc is provided with radially-extending wires of differing diameters, each wire corresponding to a particular equivalent spherical particle diameter. These wires are passed at an appropriate frequency between the light source and the light detector of the analyzer. The reduction of light as received at the detector is a measure of the size of the wire, and the electronic signal may then be adjusted to provide the desired signal for corresponding spherical particles. This calibrator may be operated at any time without interrupting other processing.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: W-7405-ENG-26
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4135821
• OSTI ID: 863268
• Country of Publication: United States
• Language: English

Related Subjects

calibration
optical
particle-size
analyzer
relates
light-intercepting
type
spherical
particles
rotary
wheel
disc
provided
radially-extending
wires
differing
diameters
wire
corresponding
particular
equivalent
particle
diameter
passed
appropriate
frequency
light
source
detector
reduction
received
measure
size
electronic
signal
adjusted
provide
desired
calibrator
operated
time
interrupting
processing
appropriate frequency
spherical particles
light source
light detector
electronic signal
particle diameter
particle-size analyzer
optical particle-size
spherical particle
/356/