| US 7,355,685 B2 | ||
| Stroboscopic LED light source for blood processing apparatus | ||
| Joseph A. Scibona, Littleton, Colo. (US); and Shannon Durkee, Phoenix, Ariz. (US) | ||
| Assigned to Gambro BCT, Inc., Lakewood, Colo. (US) | ||
| Filed on Oct. 05, 2007, as Appl. No. 11/867,816. | ||
| Application 11/867816 is a division of application No. 10/905353, filed on Dec. 29, 2004, granted, now 7,327,443. | ||
| Application 10/905353 is a continuation in part of application No. 10/884877, filed on Jul. 01, 2004. | ||
| Claims priority of provisional application 60/485015, filed on Jul. 02, 2003. | ||
| Prior Publication US 2008/0024757 A1, Jan. 31, 2008 | ||
| Int. Cl. G01N 33/48 (2006.01) | ||
| U.S. Cl. 356—39 | 14 Claims |
| 1. A stroboscopic apparatus comprising:
a light source for providing an incident light beam for illuminating an observation region, said light source comprising
a plurality of reflective surfaces spaced around a central illumination axis, and
a plurality of light emitting diodes, at least one light emitting diode being spaced away from said central illumination axis
radially outward from at least one of said reflective surfaces such that light from said diode is reflected from said surface
generally along said central axis;
a controller energizing said diodes for selected periods of time, said controller produces pulses for energizing said diodes,
said pulses having a variable duration and amplitude for providing a consistent light intensity output from said diodes, and
a light collection element for collecting at least a portion of said light transmitted, scattered or both from said observation
region.
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