Optical particle counter employing a field-calibrator
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United States of America Patent
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Nov 4, 1997
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N/A
app pub date -
Sep 22, 1995
filing date -
Sep 22, 1995
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Abstract
A particle counter including a modulator to allow electronically determining calibration. The modulator is connected to a driving circuit of a source of light to cause the light to emit a beam of a constant amplitude, representing at least one particle of predefined size. Light transmitted along an optical axis changes in intensity in response to a signal produced by the modulator. A detector is positioned to sense the change in intensity to produce signals proportional to the light sensed. A displaying device, such as a pulse height analyzer, is in electrical communication to receive the signals produced by the detector to quantitatively display the change in intensity of the light.
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