Patent ID: 6946645
Filing Date: 2005-09-20
Classification: G01L

Abstract:
1. A system for measuring values of a parameter at multiple locations, comprising: multiple transducers at spaced-apart multiple locations, each transducer optically coupled to receive light from a source of light, each transducer designed to reflect received light as reflected light indicative of a local value of the parameter, each transducer producing reflected light in a different spectral portion of the received light; a sweeping comb filter coupled to receive reflected light from the transducers; and a wavelength division multiplexer coupled to receive reflected light from multiple transducers; wherein the sweeping comb filter and the wavelength division multiplexer are coupled together to receive and operate on reflected light from the transducers; and wherein the sweeping comb filter has a wavelength separation between adjacent pass bands that is significantly less than the spectral range of the reflected light from the multiple transducers.