Patent ID: 6804001
Filing Date: 2004-10-12
Classification: G01J,G01N,G02F

Abstract:
A device for measuring the space distribution of the spectral emission of a measurement zone of an object, comprising:a first lens to form, in a Fourier plane of the first lens, a first image constituting an optical Fourier transform of the measurement zone; a first diaphragm; a second lens set between the first lens and the first diaphragm and co-operating with the first lens so that an opening of the first diaphragm is conjugated optically with the measurement zone by the first and second lenses and so that the measurement zone, when observed through the first diaphragm, has an apparent surface approximately independent of a direction of observation, the first and second lenses having a common optical axis that constitutes an optical axis of the device; means for selecting a rectilinear portion of the first image following a direction of selection; means for dispersing light corresponding to the selected portion of the first image; a bidimensional image sensor, configured to receive the dispersed light and to provide signals representative of the dispersed light; and means for treating the signals, to determine a spectral response of the measurement zone for each point of the rectilinear portion of the first image.