Optics: measuring and testing – By electrophoresis
Patent
1990-07-31
1993-08-24
Arnold, Bruce Y.
Optics: measuring and testing
By electrophoresis
356410, 359355, 359664, 2504611, G01N 2101, G01N 2164, G02B 902, G02B 1314
Patent
active
052393607
ABSTRACT:
An apparatus for enhancing signal to noise ratio in the detection of electromagnetic radiation traversing a capillary tube includes a ball lens and a holding element for holding the ball lens and the capillary tube, the holding element having an aperture so that the aperature and the lens together define an optic axis. The holding element is configured to hold the capillary tube such that the center of the capillary tube traverses the optic axis. The lens has a focal length and is held at such a position relative to that focal length by the holding element such that electromagnetic radiation incident on the aperature is focussed to pass radially through the capillary tube. Thus, the effective path length is 100% of the inside diameter of the capillary tube.
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Mead Dennis E.
Moring Stephen E.
Applied Biosystems Inc.
Arnold Bruce Y.
Frazzini John A.
Parsons David R.
Smith Joseph H.
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