Luminescence Sensors
Luminescence Sensors emit UV light with a wavelength of 380 nm. If the emitted light strikes a luminescent object, it reflects light within a visible wavelength range of 420 – 750 nm in accordance with the utilized luminescent substance. This fluorescent effect is exploited by the Luminescence Sensor in order to detect markings which are invisible to the human eye during daylight hours.
Applications
- Checking for the presence of labels
- Alignment of spray cans without any visible markings
- Verification of product authenticity (counterfeit detection)
- Controlling saws in the woodworking industry
Luminescent Substances
Luminescent substances can be applied to almost anything (e. g. labels and cartons), and can be added to many substances such as ink, oil and grease. The use of an optical filter makes it possible to select which wavelength range (i. e. which color) will be visible to the sensor.
Adjustments
Adjustments are performed via Teach-In keys at the sensor or the external Teach-In input. Also with a potentiometer or via the RS-232 interface configurations are possible.
Interface
Sensor functions can be activated via the RS-232 interface. Additionally the Light Intensity can be read out.