Photodensitometer for minimizing the refractive effects of a fluid sample
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United States of America Patent
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Mar 15, 1988
Grant Date -
N/A
app pub date -
Oct 31, 1985
filing date -
Oct 31, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An automated vertical photo densitometer for reading solutions contained in microwell plates. The densitometer utilizes an optical system for minimizing the optical effect of a meniscus on the fluid sample. The invention also discloses a method for determining a centrally located position of a microwell beneath an interrogating beam of light by controlling the size of the light beam and by stepping the well through the beam. A measurement of the light intensity received by a detector is taken at each step. A maximum light intensity value is selected as corresponding to a well position wherein a central area of the fluid sample is substantially within the interrogating beam.
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