OPTICAL SPECTROMETER

摘要

The present invention discloses a compact optical spectrometer setup which removes the necessity of embedding into the spectrometer a wavelength dispersive element (prism or grating) and provides higher spectral resolution together with smaller dimensions than conventional portable spectrometers. Incident light, which is defined by a single spectrum, passes through optical band-pass filter (5), optically diffusive element (4), optical filter with spatially non-uniform transmission characteristics (3) and is detected at optical sensor (2). Optical sensor (2) consists of large number of pixels (>le6) with each pixel being subjected to differently transformed spectrum of light incident on band-pass filter (5). Spectrum of incident light is then calculated at controlling device (PC) from signal measured at each pixel and spectral responses matrix whose elements correspond to signals measured at each pixel for each wavelength (in the wavelength range of interest) and are obtained using calibration by a wavelength tuneable monochromatic light source.