NIR Spectral Imaging - Welcome to OPOTEK, Inc .PPT

Basics An extension to NIR spectroscopy. Analyzing the contents of an heterogeneous object Current instruments utilize broadband light sources to illuminate the target object and filter the light reflected from it. Narrowband filters, such as LCTF offer about 6 nm spectral resolution Limitations of Systems Based on Broadband Light Sources Slow Data Collection Limited Spectral Resolution Limited Field of View (FOV) Generation of Heat, may be harmful to the sample Dark noise, low Signal to Noise Consumer product Deposits on Paper Deposits on in-situ Skin Defatted Chips Deposits on Skin Defatted Chips Conclusions Hyperspectral imaging using a pulsed, tunable laser has great potential for on-line or at-line analyses where both images and spectral information are desired. The short 5-ns pulse widths, rapid wavelength tunability, high peak power, and low average power enables high-sensitivity spectral imaging measurements to be made on samples including human subjects) that would not be able to withstand the high intensities of conventional incandescent light sources. The high sensitivity allows good analysis using various chemometrics techniques e.g. spectral derivatives and principal component analysis– all with spectral images collected much faster than previous technology. * * * * * * * * OPOTEK Inc. Re-inventing Spectral Imaging Lam Nguyen Eli Margalith Using Tunable Lasers OPOTEK Inc. Rapid, Calibrated, High Resolution, Spectral Imaging  UsingTunable a Laser as the Illumination Source Longer Title NIR Spectral Imaging NIR Spectral Imaging NIR Spectral Imaging OPOTEK Inc. Advanced Concept The Tunable Laser replaces the broadband light source and the tunable filters The tunable laser scans the NIR wavelength range The light is transmitted via fiber(s) to the target The reflected light is collected by an IR camera A Hyperspectral cube is recorded US Patent 7,233,392 NIR Spectral Imaging OPOTEK Inc. Advantages Spectral Imaging using Tunable Laser as the il