Optics: measuring and testing – By shade or color – With color transmitting filter
Patent
1995-05-15
1997-04-08
Evans, F. L.
Optics: measuring and testing
By shade or color
With color transmitting filter
250226, 25022712, G01J 351
Patent
active
056193327
ABSTRACT:
An incident optical signal is captured by an array of apertures and directed to pairs of fibers, each pair having a delay fiber with a unique length and a no-delay fiber. Each pair of fibers further has a unique transmission characteristic. Time interpolation is then performed using the transmission characteristic curve for each delay fiber and the duration from the time the optical signal arrives over the no-delay fibers and the time the signal arrives over the delay fibers to determine the wavelength. In a second embodiment, each pair of delay and no-delay fibers is replaced by a fiber splitter which directs light into a no-delay fiber and a delay fiber that have been split from the input of the splitter. In a third embodiment, two fiber splitters are used in place of the pairs of fibers. Each splitter has a number of branches for receiving light and an output end for guiding light onto the photodetectors. The propagation time of the delay optical signal, as compared against the no-delay signal, and other factors such as the length of the individual fiber and the transmission characteristics, are used to determine the wavelength.
REFERENCES:
patent: 3953127 (1976-04-01), Ahlquist et al.
patent: 4296319 (1981-10-01), Franks et al.
patent: 4299488 (1981-11-01), Tomlinson
patent: 4625108 (1986-11-01), Nestel et al.
patent: 4627008 (1986-12-01), Rosenthal
patent: 4671604 (1987-06-01), Soref
patent: 4674874 (1987-06-01), Halldorsson et al.
patent: 4825063 (1989-04-01), Halldorsson et al.
patent: 4850693 (1989-07-01), Deason et al.
patent: 4856899 (1989-08-01), Iwaoka et al.
patent: 5134302 (1992-07-01), Rosenthal
patent: 5223916 (1993-06-01), Muraoka
patent: 5225894 (1993-07-01), Nicholson et al.
patent: 5231521 (1993-07-01), Johnson et al.
patent: 5303165 (1994-04-01), Ganz et al.
patent: 5305233 (1994-04-01), Kawagoe et al.
patent: 5324979 (1994-06-01), Rosenthal
patent: 5340979 (1994-08-01), Baney et al.
patent: 5416578 (1995-05-01), Ohki et al.
Evans F. L.
Tracor, Inc.
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