Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1992-04-09
1993-08-17
Turner, Samuel A.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
356238, 356356, 356384, G01B 902
Patent
active
052373894
ABSTRACT:
A device for measuring the positions and the diameters of the filaments in filament bundle comprising a laser scanner disposed adjacent the filament bundle wherein, in the optical path behind the filament bundle to be measured, are disposed an optical means such as a lens of mirror, as well as a filter preferably in the focal plane of said optical means for filtering out the light share not diffracted, as well as a detector and analysis means. The filter is permeable only for limited portions of the diffraction image, and the detector means measures the intensities at several locations of the diffraction image at the same time. In the analysis means the positions of the filaments are determined on the basis of the measured intensity curves while the diameters of the filaments are determined on the basis of the ratios of the measured intensities.
REFERENCES:
patent: 3659950 (1972-05-01), Troll et al.
patent: 3719425 (1973-03-01), Leitz et al.
patent: 3812376 (1974-05-01), Takeyama et al.
patent: 4566795 (1986-01-01), Matsuura et al.
patent: 4828392 (1989-05-01), Nomura et al.
Fraunhofer Gesellschaft zur Forderung der angewandten Forschung
Turner Samuel A.
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