Pulsed laser densitometer system

Details Pulsed laser densitometer system Pulsed laser densitometer system

1976-04-16

1978-01-17

Sacher, Paul A.

Optics: measuring and testing

Inspection of flaws or impurities

Bore inspection

G01N 2122

Patent

active

040689565

ABSTRACT:
A pulsed laser densitometer system measures highly optically dense samples. A pulsed laser beam pulse is split so that part of the beam pulse is directed through an optical delay path. The delayed beam pulse is then brought into the same path as the beam pulse transmitted through the sample and both beam pulses are fed through a detector. The output of the detector contains the optical density information in the ratio of the pulse amplitude of the transmitted pulse to the delayed pulse.

REFERENCES:
patent: B530569 (1976-03-01), Milam et al.
patent: 3520624 (1970-07-01), Johnson et al.
patent: 3560098 (1971-02-01), Witte et al.
patent: 3725204 (1973-04-01), Marshall et al.
patent: 3782828 (1974-01-01), Alfano et al.

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