Two-band optical comparator for use with chopped CW singlet oxyg

Details Two-band optical comparator for use with chopped CW singlet oxyg Two-band optical comparator for use with chopped CW singlet oxyg

1988-08-09

1989-05-09

Howell, Kyle L.

Surgery

Truss

Pad

128634, 128654, 128664, 128362, A61B 600, A61N 500

Patent

active

048279382

ABSTRACT:
An improved apparatus and method for detecting singlet oxygen emission produced during photoradiation is disclosed. The invention utilizes a two-band optical comparator to detect optical emissions. The optical comparator comprises an in-band filter that passes light in the 1270 nm singlet oxygen emission band and an out-of-band filter that passes light outside of the 1270 nm singlet oxygen emission band. The signal detected when the out-of-band filter is used is composed essentially of a fluorescence emission. This detected signal is used to synchronize an electronic reference signal. The electronic reference signal is used by a signal processing means to isolate a phase delayed singlet oxygen emission component which appears with a fluorescence emission component in the 1270 nm singlet oxygen emission band.

REFERENCES:
patent: 4576173 (1986-03-01), Parker et al.

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