Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1979-11-23
1981-11-10
Punter, William H.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
356333, 356334, 455612, G01J 312, G01J 318, G01J 328, H04B 900
Patent
active
042994888
ABSTRACT:
A time-division multiplexed spectrometer (TMS) which can convert the output from a pulsed continuum radiation source into a time- and wavelength-division multiplexed pulse train is provided, by a single spectrometer (1, 2) when: (a) an input source (100) is terminated at the image plane of the spectrometer at a first position which is displaced from the symmetry plane, (b) the first end of a set of optical fibers (100-110), each having a different length, are determined at the image plane at positions which are displaced in the opposite direction from the symmetry plane as is the first position, whereby narrowband portions of the output spectrum are picked up and delayed by different amounts, (c) the second end of the set are terminated at the image plane at positions which are reflections of the terminations of the first end about the symmetry plane, whereby the signals are reinjected into the instrument and refocused onto a second position at the image plane corresponding to the reflection of the first position about the symmetry plane, and (d) an optical receptor is terminated at the second position.
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Bell Telephone Laboratories Incorporated
Einschlag Michael B.
Punter William H.
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