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Schematic of LSPR imaging instrument. Collimated white light from the light source is sent through a polarizer and then directed via three mirrors through the sample into a liquid crystal tunable filter (LCTF). A single selected wavelength is sent through a lens to the CCD camera, which collects a single-wavelength black and white image. The computer cycles the LCTF through all the wavelengths of interest and triggers the CCD to take an image at each wavelength.
