Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1983-02-09
1985-03-19
Willis, Davis L.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
250227, 350 9614, G01B 902
Patent
active
045055882
ABSTRACT:
A fiber stellar interferometer having a pair of adjustably movable focusing lenses, a pair of monomode optical fibers, a block of electro-optic material defining a pair of optical paths, means for controlling the effective path length of one of the optical paths and an intensity detector. Electromagnetic radiation emanating from a source, such as a star, is received at two separate locations by the focusing lenses which direct this electromagnetic radiation into two separate beams which are focused into each of the pair of monomode fibers, respectively. The monomode fibers direct these two beams into respective optical paths within the electro-optic block of material. The outputs from the two optical paths are combined and received by the intensity detector. Varying the effective path length of one of the optical paths alters the phase of the beam passing therethrough. As a consequence thereof the intensity of the output received by the detector varies accordingly. These varying intensities can be utilized to determine the size and shape of the source by conventional stellar intensity interferometer techniques.
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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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