Stroboscopic LED light source for blood processing apparatus
US7327443B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2004 |
| Grant date | Feb 5, 2008 |
| Priority date | — |
| Expiry date | Feb 4, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2015/047
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to apparatus for controlling the processing of blood into blood components, particularly components for stroboscopic LED light sources for centrifuges. The stroboscopic apparatus comprises a first light source with reflective surfaces spaced around a central illumination axis, and light-emitting diodes spaced away from the axis radially outward from the reflective surfaces. An additional light source comprises a modified parabolic reflector surrounding a light emitting diode, the parabolic reflector having walls spaced outwardly from an axis of symmetry such that focal points fall radially outwardly from a center of the LED, forming a circular focal area. A controller that energizes the diodes for selected periods of time comprises a pair of switches connected in series, with an LED connected between the switches. One of the switches is connected to ground and is closed at the end of a period of illumination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.