Optical emission line monitor with background observation and cancellation

Patent · Tue Oct 07 04:00:00 EDT 1986

OSTI ID:5132547

Goff, D R; Notestein, J E

An optical emission line monitoring system is described for remotely detecting a selected emission line from a light source in the presence of interferring background radiation, comprising: a bifurcated fiber optic cable having first and second branches and a common trunk and adapted at the end of the first branch to optically couple light from the light source to the cable; a first bandpass optical filter having a bandpass centered about and corresponding in width to the selected emission line and disposed to intercept light passing from the end of the common trunk end of the cable and reflect light outside of the bandpass of the first filter back into the common trunk end of the cable; and second bandpass optical filter having a bandpass centered about a wavelength identical to the first filter and a bandwidth substantially wider than the bandwidth of the first filter, the second filter disposed at the end of the second branch of the cable to view a portion of the light reflected back into the common trunk of the cable.

• Assignee: Dept. of Energy, Washington, DC
• Patent Number(s): US 4616137
• OSTI ID: 5132547
• Country of Publication: United States
• Language: English

Related Subjects

440300* -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
AMPLITUDES
BACKGROUND RADIATION
CABLES
DESIGN
ELECTROMAGNETIC RADIATION
EMISSION
FIBER OPTICS
FIBERS
FILTERS
INTERFERENCE
LIGHT SOURCES
MEASURING INSTRUMENTS
MONITORS
OPERATION
OPTICAL FIBERS
OPTICAL FILTERS
OPTICAL SPECTROMETERS
RADIATION MONITORS
RADIATION SOURCES
RADIATIONS
REFLECTION
REMOTE SENSING
SIGNALS
SPECTROMETERS
VISIBLE RADIATION
WAVELENGTHS