Measuring thickness and dispersion in tissues or bodily fluids using short-coherence interferometry, determines content of substance from its influence on optical characteristics

摘要

From the results of dispersion measurement the substance content influencing optical characteristics is determined. Only partial interferograms are used from the full short-coherence interferogram G(T). Dispersion measurement employs a short scan about a selected position, especially the virtual position of the dispersion measurement. Short coherence interferometry is used in the eye. The position of a reference mirror (14) is fixed relative to the eye (7) with the aid of an end support (63) and is adjusted by means of a concave mirror (30). Orientation of the eye relative to the measurement beam (5) of an interferometer, is effected with the help of a target beam (32). A modified Michelson-Interferometer is used as the interferometer. Movement of the reference mirror is registered using a calibration interferometer.