摘要:
An authentication system may comprise: a first light source, a second light source, and at least three optically filtered light sensing devices for detecting analog emission intensity in a spectral sensitivity range, wherein each light sensing device is in operable communication with the first light source and/or the second light source. The first light source can have a first light source spectral distribution and can be capable of providing sufficient excitation to produce a photoluminescent emission from a medium comprising a luminescent tag and a color. The second light source can have a visible multi-wavelength spectral distribution and can be capable of providing sufficient visible multi-wavelength illumination of the medium to generate a second analog response, wherein the second analog response is different from the photoluminescent emission. Each light sensing device can have a different device spectral sensitivity range which includes at least a portion of the visible multi-wavelength spectral distribution, with the device spectral sensitivity range of at least one of the light sensing devices including at least a portion of a desired photoluminescent emission wavelength range.
摘要:
Sensor devices are disclosed possessing substrates having enhanced resistance to solvents. The sensor device (10) has a sensor region (12) deposited on a substrate (14). In optional embodiments, a protecting layer (16) is applied over the sensor region. The substrates include polycarbonates combined with solvent resistance-imparting monomers that result in a copolycarbonate substrate immune to attack by organic solvents commonly used in sensor deposition and improve the quality of the deposited sensor regions.
摘要:
Methods for applying sensor materials to optical storage media substrates are disclosed. After exposure to a sample of interest, the resulting sensors may be read in optical storage media drives for quantitative analysis of physical, chemical and biological parameters of the sample.