Patent ID: 9243996
Filing Date: 2016-01-26
CPC Classification: G01N

Claim Text:
1. A densitometer for use with a sample support, the sample support including at least one sample support location adapted to hold a sample, each location formed of a location supporting material which is at least partially translucent, the densitometer comprising in combination: a first structure adapted to reside on a first side of the sample support; a second structure adapted to reside on a second side of the sample support spaced from said first side; said first structure and said second structure spaced apart by a distance sufficient to allow the sample support to fit between said first structure and said second structure; at least one of said first structure and said second structure including at least one LED thereon; at least one of said first structure and said second structure including at least one detector thereon, said detector positioned to detect light from said LED after the light passes through a sample at the sample support location when the sample support is oriented between said first structure and said second structure; wherein a plurality of LEDs are coupled to at least one of said first structure and said second structure; wherein said plurality of LEDs include at least two LEDs spaced from each other a distance similar to a spacing between wells in the microtiter plate providing the sample support locations, and with which the densitometer is adapted to be used; and wherein said LEDs are coupled to a power source which supplies electric power to the LEDs to cause said LEDs to emit light, circuitry interposed between said power source and said LEDs provided to sequentially activate and deactivate individual LEDs, such that readings made by detectors result from illumination of only a single LED of known frequency.