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Recognoil – User's Manual
Software version 2.2.1_2015-02-21
5.
PRACTICAL INFORMATION
Table of applications:
chart 1.: area of suitable applications
Please note that it is not possible to detect oils of silicone nature.
5.1.
Principle of operation
To get the fully trusted results and outcomes of the Recognoil device, it is important to get
to know the basic principles of device operation.
The device irradiates the surface with invisible and undetectable UV light. The certain
physical and chemical properties of the residual grease and oils force the chemical
elements and molecules to emit visible light. This natural phenomenon is called
fluorescence. Now we are getting close to the first limitation of this method.
The first limitation
The UV source, as mentioned above, emits invisible and undetectable radiation. On the
other hand, the detector then receives the outcomes of the fluorescence process, which
emit radiation in the domain of visible light. If there is a light coming from the
environment, not originating from the process of fluorescence, it interferes with the
fluorescence signal and disrupts the detection. For this reason, detections need 100% light-
free environment. The exceptions are described later in this section.
The second limitation
The detector consists of a small detecting plate, which converts the incident light into
electrical signal, which is then analyzed by the software. Because of the need of
transferring the light from a bigger surface onto this very small detecting plate, a set of
lens must focus the incoming light. Every lens has a focusing point. The Recognoil device
has a fix focusing point, which cannot be changed. The second limitation limits the allowed
distance of the object within +/- 3 mm far from the focusing point.
The goal of a successful detection is to find the ideal conditions – to eliminate the
environmental light and to find the ideal distance of the desired surface.
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