Invisible mark viewers
- Viewer Wizard™ V6 — hand held device to visualize invisible markings
- Viewer Wizard™ PV6B and viewer Wizard™ PV8B — battery-powered pocket-size devices to visualize invisible markings
Description of the viewer and its operation
The hand held viewer for invisible marks from the Wizard™ family is a convenient tool for viewing bar codes and other markings printed with special invisible inks on various substrates.
The Wizard™ viewers are opto-electronic devices housed in a plastic enclosure. The front side of the viewer has a high resolution TFT LCD display and a pushbutton. The underside has a dark plastic window. When the pushbutton is pressed, a beam of special light emanates from the back window. This beam is directed by the operator at the area where an invisible mark is expected to be. The invisible ink returns an invisible modulated response signal to the viewer.
The Wizard™ viewer processes this signal and converts it into a clear, well-defined image shown on its TFT LCD screen, which faces the operator. The live image facilitates the process of finding the best position of the viewer relatively to the invisible mark. Little prior training is necessary as image finding, centering and ranging operations are intuitive. The viewer will automatically adjust its sensitivity and image contrast.
For optimum performance, the Wizard™ viewer has a knob, a thumbwheel, or a pushbutton for adjustment of the viewer’s response, depending on the model.
An invisible mark may be printed on light objects, such as white paper or plastic; on any surface painted white; or on dark objects, for example, dark wood, plastics, colored paper, or cardboard.
The direct and indirect sunlight or incandescent light may interfere with the process of interaction between the viewer and the mark. The Wizard™ viewer easily tolerates office lighting. Best viewing results are obtained away from sunlight or incandescent lamps.