Sensitive measuring cell for a differential refractometer of the interference type
OwnerSten Silverbageinventor
Life of this patent
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Abstract
A highly sensitive measuring cell for a differential refractometer of the interference type for chemical analyzers comprises two channels in a measuring body, one of said channels conveying a medium whose refractive index is to be measured and the other channel conveying a reference medium of known refractive index. The respective path lengths of the measuring channel and the reference channel are mechanically adjustable to exactly the same lengths in order that a maximum common mode rejection ratio (hereafter "CMRR") value may be achieved.
Claims8
A highly sensitive measuring cell for an interference type of differential refractometer, said measuring cell comprising:
- (a) a measuring body provided with two channels,
- (b) one of said channels being a measuring channel for a medium whose refractive index is to be measured, and
- (c) the other measuring channel being a reference channel for a reference medium of a known refractive index, and
- (d) means for mechanically adjusting the respective path lengths of said measuring channel and of said reference channel to exactly the same geometrical length for achieving a maximum CMRR value.
Dependencies are inferred from the claim text.