Patent ID: 8049894
Filing Date: 2011-11-01
Classification: G01J

Abstract:
1. A multiple optical wavelength analyzer device for measuring properties of light in a first waveguide, comprising: a first input unit attached to an end of said first waveguide directing said light in said first waveguide into a collimated beam; a first detector unit for receiving said light from said input unit; a plurality of thin film filters mounted to a rotatable table and arranged with respect to said first input unit and said first detector unit so that said plurality of thin film filters travel in a circle when rotating, a reflecting surface of each thin film filter generally perpendicular to the rotation, each thin film filter transmitting light of a particular wavelength to said first detector unit responsive to an angle of incidence of light from said first input unit upon said thin film filter when said thin film filter is optically interposed between said first input unit and said first detector unit; a motor for rotating said table, each of said plurality of thin film filters optically interposed between said first input unit and said first detector unit periodically and rotated so that said angle of incidence of light from said first input unit upon said thin film filter is varied when said thin film filter is optically interposed between said first input unit and said first detector unit; and a position sensor unit arranged with respect to said rotatable table and said plurality of thin film filters to receive light reflected from each thin film filter when said thin film filter is optically interposed between said first input unit and said first detector unit, output signals generated from said position sensor unit providing reference signals determining the rotational position of said rotatable table and said plurality of thin film filters and the wavelength of light transmitted through each of the thin film filter; whereby each thin film filter scans said light from said first waveguide by wavelength within a selected wavelength band into said first detector unit for measurement.