01095nas a2200109   4500008004100000245013500041210006900176520046500245100002400710700002000734856023100754       2000                        eng d00aUnited {States} {Patent}: 6091502 - {Device} and method for performing spectral measurements in flow cells with spatial resolution0 aUnited States Patent 6091502 Device and method for performing sp3 aA device and method for performing spectral measurements in flow cells with spatial resolution using a variable transmission optical filter having at least two areas with different optical properties. Light from a light source passes through the variable transmission filter to a flow cell containing a sample to be analyzed. The resultant light pattern is sensed by a detecting means, which analyzes the spectral properties of the sample within the flow cell.1 aWeigl, Bernhard, H.1 aAltendorf, Eric  uhttp://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=34&f=G&l=50&co1=AND&d=PTXT&s1=%22Weigl%3B+Bernhard%22.INNM.&OS=IN/%22Weigl;+Bernhard%22&RS=IN/%22Weigl;+Bernhard%22