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A new tool for law enforcement The latest generation of CDEX's ID? meth scanner is shaped more like an upright flashlight than the previous gun-shaped beta versions, The device can scan any surface to detect as little as 1 microgram of methamphetamine. In recent testing with the Greenlee County Sheriff's office in Arizona, no false-positives were recorded in 12 attempts. N ĐĂNG How it functions I The scanner is designed for left-handed or right-handed operation. I The thumb is used to press a scanning button on the rear of the scanner. METH POSITIVE The scanner will scan continuously for meth until the button is released. BATTERY LON I Results are interpreted instantly and a light flashes when meth is detected. POLICE ON I The interface also features a range finder which lights up when surfaces are within the scanner's range of at least eight inches ARTM ENT OFF N. Two distance sensors Rear display Receiver detects optical signatures to verify substance Two lamps transmit ultraviolet light at a range of eight inches with a two inch footprint Laser pointer Cigarette lighter adapter Potential meth Handle doubles as a compartment for two rechargeable nickel metal hydride batteries How it works The meth scanner detects the presence of meth by projecting ultraviolet light onto a surface where meth is suspected. An optical signature is then sent back to a receiver on the scanner. The scanner then matches all the signatures against its database of known meth signatures to determine positive or negative results. ĆDEX refers to this process as Enhanced Photoemission Spectroscopy. The device is essentially utilizing three known optical processes to determine its results. Fluorescence spectrometry Molecule- Raman scattering When light excites a molecule, some will reflect wavelength at the same wavelength, whereas some will reflect at a different wavelength. Different Ultraviolet light at a specific wavelength penetrates a molecule (in this case meth; COH"N), exciting it, and causing electron decay. Same wavelength Original light source Nucleus As the electron shells decay, they release photons in the form of a fluorescent light that is unique to each type of molecule. The new wavelengths provide unique signatures because they correspond to the amount of energy used to excite that molecule. Electron Molecule Specular reflection This occurs when light from one direction reflects perfectly off a surface in exactly one other direction; like how light reflects from a mirror. This type of reflection yields additional components to the optical signature that improve detection. The optical signature All of these processes result in a unique signature for every molecule the device scans. A signature is typically analyzed graphically, in this case, the chart is created from a measurement of Raman scattering: Meth signature A diffuse reflection: surface reflects light in various directions 150 Some energy may be absorbed depending on the surface 100 Light source 50 Specular reflection 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,00o0 Energy difference of scattered light (cm-1) SOURCES: CDEX INC., RAMAN SYSTEMS PETE SMITH/ PSMITHONEWS-LEADER.COM / NEWS-LEADER GRAPHIC A new tool for law enforcement The latest generation of CDEX's ID? meth scanner is shaped more like an upright flashlight than the previous gun-shaped beta versions, The device can scan any surface to detect as little as 1 microgram of methamphetamine. In recent testing with the Greenlee County Sheriff's office in Arizona, no false-positives were recorded in 12 attempts. N ĐĂNG How it functions I The scanner is designed for left-handed or right-handed operation. I The thumb is used to press a scanning button on the rear of the scanner. METH POSITIVE The scanner will scan continuously for meth until the button is released. BATTERY LON I Results are interpreted instantly and a light flashes when meth is detected. POLICE ON I The interface also features a range finder which lights up when surfaces are within the scanner's range of at least eight inches ARTM ENT OFF N. Two distance sensors Rear display Receiver detects optical signatures to verify substance Two lamps transmit ultraviolet light at a range of eight inches with a two inch footprint Laser pointer Cigarette lighter adapter Potential meth Handle doubles as a compartment for two rechargeable nickel metal hydride batteries How it works The meth scanner detects the presence of meth by projecting ultraviolet light onto a surface where meth is suspected. An optical signature is then sent back to a receiver on the scanner. The scanner then matches all the signatures against its database of known meth signatures to determine positive or negative results. ĆDEX refers to this process as Enhanced Photoemission Spectroscopy. The device is essentially utilizing three known optical processes to determine its results. Fluorescence spectrometry Molecule- Raman scattering When light excites a molecule, some will reflect wavelength at the same wavelength, whereas some will reflect at a different wavelength. Different Ultraviolet light at a specific wavelength penetrates a molecule (in this case meth; COH"N), exciting it, and causing electron decay. Same wavelength Original light source Nucleus As the electron shells decay, they release photons in the form of a fluorescent light that is unique to each type of molecule. The new wavelengths provide unique signatures because they correspond to the amount of energy used to excite that molecule. Electron Molecule Specular reflection This occurs when light from one direction reflects perfectly off a surface in exactly one other direction; like how light reflects from a mirror. This type of reflection yields additional components to the optical signature that improve detection. The optical signature All of these processes result in a unique signature for every molecule the device scans. A signature is typically analyzed graphically, in this case, the chart is created from a measurement of Raman scattering: Meth signature A diffuse reflection: surface reflects light in various directions 150 Some energy may be absorbed depending on the surface 100 Light source 50 Specular reflection 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,00o0 Energy difference of scattered light (cm-1) SOURCES: CDEX INC., RAMAN SYSTEMS PETE SMITH/ PSMITHONEWS-LEADER.COM / NEWS-LEADER GRAPHIC