en Description B Color line sensor FE 5002
en Description B Color line sensor FE 5002
en Description B Color line sensor FE 5002
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<strong>Color</strong> <strong>line</strong> s<strong>en</strong>sor <strong>FE</strong> <strong>5002</strong><br />
2.7 Surface and transpar<strong>en</strong>cy<br />
Diffuse light<br />
2.8 Background panel<br />
2.9 S<strong>en</strong>sor accessories<br />
B Page 6<br />
Flood light<br />
Reflection of the light beams with reflective<br />
surfaces<br />
3. Mounting and<br />
installation<br />
This section is not relevant to color <strong>line</strong> s<strong>en</strong>sors operating on a<br />
back lighting principle.<br />
Apart from the color contrast, the surface also contributes to the s<strong>en</strong>sitivity<br />
of the color <strong>line</strong> s<strong>en</strong>sor. Highly reflective surfaces (e.g. silver<br />
film) reflect very much light, matt or rough surfaces (e.g. paper) reflect<br />
little light.<br />
In the case of highly reflective surfaces the light beams are reflected<br />
away by the structural arrangem<strong>en</strong>t of the flood light. To the color<br />
<strong>line</strong> s<strong>en</strong>sor, a silver film appears as a black film and through reflection<br />
further color information may also be lost. For this reason, a light<br />
guiding criterion, e.g. a white <strong>line</strong>, is best suited to highly reflective<br />
surfaces.<br />
If, in such cases, no light guiding criterion is available, the color <strong>line</strong><br />
s<strong>en</strong>sor automatically uses diffuse light whereby the reflected light is<br />
evaluated (see figure on left). A silver film acts as a mirror. Due to<br />
this mirror effect, the s<strong>en</strong>sor sees the pale diffuse light. With it, highly<br />
reflective surfaces appear light.<br />
This section is not relevant for color <strong>line</strong> s<strong>en</strong>sors operating on a<br />
back lighting principle.<br />
If scanning is always within a non-transpar<strong>en</strong>t web, no panel is necessary.<br />
On non-transpar<strong>en</strong>t webs on which the edge or close to it is to be<br />
scanned, a matt black background panel should be used.<br />
With dark <strong>line</strong>s (black or shiny silver) on transpar<strong>en</strong>t webs a light<br />
background panel is necessary (the transpar<strong>en</strong>t section appears<br />
light).<br />
<strong>Color</strong> <strong>line</strong> s<strong>en</strong>sor accessories include the connection cable and the<br />
following s<strong>en</strong>sor holders:<br />
Type Securing Mounting<br />
VA 6007 20 x 20 mm rigid<br />
VA 6027 20 x 20 mm flexible<br />
VA 6107 40 x 40 mm rigid<br />
VA 6127 40 x 40 mm flexible<br />
Please observe the locally applicable and professional safety<br />
and accid<strong>en</strong>t prev<strong>en</strong>tion regulations.<br />
Section "3. Mounting and installation" may be omitted for color <strong>line</strong><br />
s<strong>en</strong>sors ready mounted mechanically on delivery with adjusting<br />
screws secured by screw locking varnish.
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