Authentication device
AssigneeBaird Corporation
InventorJames J. Falls
Life of this patent
Estimating the term…
Abstract
An authentication device for various items is disclosed. The authentication device includes a sample treated with at least two luminophors, each luminophor being ultra-violet energy excitable but one emitting in the visible and the other in the infrared spectral range, an excitation lamp to excite the treated sample, a pair of detectors one each for detecting radiation in the visible and in the infrared spectral range, a source of power, and a display coupled to the pair of detectors. Preferably, the authentication device is provided with an optional multi-channel fiber optic cable. Preferably, the authentication device is light and portable. Preferably, the source of power is a battery. Preferably, the battery is rechargeable.
Claims11
An authentication device comprising:
- (a) a sample treated with at least two luminophors each being ultra-violet energy excitable but emitting radiation at different spectral ranges;
- (b) an excitation source to excite said treated sample;
- (c) a pair of detectors for detecting said emitted radiation at said different spectral ranges;
- and
- (d) a source of power coupled to said excitation source;
- (e) said luminophors being each excitable by radiation at wavelength below 200 nanometers;
- (f) one of said luminophors emitting in the visible range and the other of said luminophors emitting in the infrared range.
An authentication device comprising:
- (a) a sample treated with at least two luminophors each being ultra-violet energy excitable but emitting radiation at different spectral ranges;
- (b) an exciatation source to excite said treated sample;
- (c) a pair of detectors for detecting said emitted radiation at said different spectral ranges;
- (d) a source of power coupled to said excitation source;
- (e) said luminophors being each different combinations of powdered phosphors diluted with a vehicle and applied on a target area of said sample;
- (f) said excitation source comprising a short-length, Vycor glass jacketed mercury vapor lamp emitting ultra-violet radiation, a reflective element designed to intensify said ultra-violet radiation, a focusing element designed to focus said intensified ultra-violet radiation on said target area of said sample, and a filter to reduce said focused intensified ultra-violet radiation to a spectral range below 200 nanometers;
- (g) said reflective element being a concave mirror, said focusing element comprising a pair of quartz lenses, and wherein said lamp is mounted at an angle normal to the optical axis of said pair of quartz lenses.
An authentication device comprising:
- (a) a sample treated with at least two luminophors each being ultra-violet energy excitable but emitting radiation at different spectral ranges;
- (b) an excitation source to excite said treated sample;
- (c) a pair of detectors for detecting said emitted radiation at said different spectral ranges;
- (d) a source of power coupled to said excitation source;
- (e) one of said luminophors emitting in the visible range and the other of said luminophors emitting in the infrared range;
- (f) a housing provided with a slot for said sample and a display coupled to said pair of detectors, wherein said source of power is a battery;
- (g) said display comprising both a visual and an audible portion to indicate a pass or a fail condition for said sample;
- and
- (h) a connecting cable, a band pass filter and an amplifier by which each of said pair of detectors is coupled to said display.
Dependencies are inferred from the claim text.