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8.5 Trademarks
Nordic ID and Nordic ID logo are registered trademarks of Nordic ID Oy.
All terms mentioned in this User's Guide that are known to be trademarks or service
marks have been appropriately marked in the list below with either the ©, ® or the ™
symbol.
Nordic ID cannot attest to the accuracy of this information. Use of a term in this User's
Guide should not be regarded as affecting the validity of any trademark or copyright.
Company / Owner of the Trademark
Trademark
Bluegiga Technologies
WRAP ©
Bluetooth SIG inc.
Bluetooth ©
8.6 Programming the RF650 laser scanner module
A laser diode produces a single beam of coherent light, which deflects off a mirror,
and is emitted from the laser engine used inside the RF650. The total deflection of the
single beam is 53° (standard version), and the scan frequency is 39 scans per
second.
When the laser beam strikes a bar code, the dark bars absorb most of the light while
the light spaces reflect most of it. Thus, changes in the reflected light can be used to
deduce the bar code into electronic format. A photo diode is used to sense the
reflected laser light and generate a current proportional to the reflected light signal.
The current then produces an analogue voltage, which is further amplified, filtered to
minimise noise related problems and then finally sent to a digitiser, which transforms
the analogue signal into digital form repres enting the bar code.
The DBP data is then sent to the decoder board for processing into a host-compatible
format and further applications are based on the software used.
Technical specifications
The technical specifications of the laser engine used in the RF650 are listed in the
table below.
