Optics: measuring and testing – By particle light scattering – With photocell detection
Patent
1983-02-09
1985-12-17
Willis, Davis L.
Optics: measuring and testing
By particle light scattering
With photocell detection
356345, G01J 345
Patent
active
045589518
ABSTRACT:
A fiber Fourier spectrometer having a focusing element, a beamsplitter, a pair of monomode optical fibers, a block of electro-optic material defining a pair of optical paths and means for controlling the effective length of one of the optical paths. A source of electromagnetic radiation is focused through and reflected by the beamsplitter into the pair of monomode fibers, respectively, and from there to the respective optical paths within the electro-optic block of material. The outputs of the two optical paths are combined and received by an intensity detector. Varying the effective path length of one of the optical paths alters the phase of the beam passing therethrough. Because the source of electromagnetic radiation has different wavelengths, the spectral components of the source are phase retarded by different amounts as they pass through the electro-optic material and can therefore be analyzed by a conventional Fourier spectroscopy technique.
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Caulfield Henry J.
Ludman Jacques E.
Sampson John L.
Erlich Jacob N.
Koren Matthew W.
Singer Donald J.
Willis Davis L.
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