Page 6 - STM - Optical sensors for life science applications

OPTICAL SENSORS for life science applications

Reliable detection of

transparent objects

Detecting the presence of transparent bodies made of
injection-moulded plastics or glass often proves to be
surprisingly difficult. Bothersome effects such as total
reflection, diffusion or light conduction, which can make
some optical signals unanalysable, frequently arise at
the boundary surfaces.

Application example:

stored substrate carriers

u Due to the dense packing and the very different qua-
lity of the edges, undesirable reflections or deflection
effects can arise. Even small changes in the geometry
can have a drastic influence on the reliability of the
entire detection.

u Optical detection of transparent surfaces, regar- Application example: u In each of the above application examples, the ideal
dless of whether they are flat or curved, requires a well plates solution is a parallel light beam with a small diameter
very high-quality light beam exactly matched to the and low light scatter. Several sensors in the MICRO-
respective measurement situation. Sensors in the na- u The correct light beam dimension and the optimal an- mote line meet this requirement. The fact that they
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noSPOT line or the DKM60R micro-laser light barrier gle of impact are the deciding factors on whether a are also particularly small is an additional advantage.
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in the MICROmote line deliver the required precisi- detection signal will be robust or marginal.
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on.
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