Optics: measuring and testing – Sample – specimen – or standard holder or support – Fluid containers
Patent
1989-10-20
1991-10-29
Rosenberger, Richard A.
Optics: measuring and testing
Sample, specimen, or standard holder or support
Fluid containers
356338, 372 98, G01N 2105
Patent
active
050610651
ABSTRACT:
In a particle detecting instrument, a particle detecting cell comprises a laser plasma tube in combination with a glass prism through which a fluid channel is defined. The glass prism abuts the transmitting end of the laser plasma tube and the end wall of the prism is arranged at the brewster angle with respect to the plasma tube axis. The fluid channel defined in the prism is also arranged at the brewster angle with respect to the laser beam passing through the prism. A mirror is provided on the prism to reflect the light back through the prism into the plasma tube. The mirror is positioned so that the light reflected back into the plasma tube is in phase with the light amplified within the plasma tube. A mount is provided for the mirror to adjust its lateral and angular position. In an alternative embodiment, the plasma tube abuts a glass window pane defining one side wall of a fluid channel to receive a gas entraining particles to be measured.
REFERENCES:
patent: 4019056 (1977-04-01), Block et al.
patent: 4253770 (1981-03-01), Horiba
patent: 4544274 (1985-10-01), Cremers et al.
patent: 4547075 (1985-10-01), Fei
patent: 4565448 (1986-01-01), Abbott et al.
patent: 4792233 (1988-12-01), Irvine
patent: 4798465 (1989-01-01), Knollenberg
patent: 4842406 (1989-06-01), VonBargen
Pacific Scientific Company
Rosenberger Richard A.
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