Integrating LED illumination system for machine vision systems
View Patent ↗A system for focusing light on an illumination area. The system includes a reflector having a focusing reflective surface and a focal region and an LED array having a plurality of LEDs located within the focal region. Each of the plurality of LEDs in the LED array is positioned to emit light toward the focusing reflective surface. The focusing reflective surface reflects light from each of the plurality of LEDs of the LED array toward the illumination area.
1. A system for focusing light on an illumination area comprising:
a reflector having a focusing reflective surface and a focal region;
a first light-emitting diode (LED) array comprising a plurality of LEDs located within the focal region, each of the plurality of LEDs of the first LED array being positioned to emit light directly toward the focusing reflective surface; and
a second LED array comprising at least one LED positioned to emit light directly toward the illumination area;
wherein the focusing reflective surface reflects light from each of the plurality of LEDs of the first LED array toward the illumination area.
2. The system of claim 1 , wherein each of the plurality of LEDs of the first LED array is surface-mounted on a substrate having a generally convex outer surface.
3. The system of claim 2 , wherein the substrate comprises a flexible printed circuit board.
4. The system of claim 1 , wherein each of the plurality of LEDs of the first LED array is surface-mounted/on a substrate that is secured to a core that dissipates heat.
5. The system of claim 4 , wherein the core comprises at least one cooling fin.
6. The system of claim 1 , wherein the second LED array comprises a single row of LEDs.
7. The system of claim 1 , wherein the focusing reflective surface is concave.
8. The system of claim 7 , wherein the focusing reflective surface is generally elliptical.
9. The system of claim 7 , wherein the focusing reflective surface is generally parabolic.
10. The system of claim 7 , wherein the focusing reflective surface is generally hyperbolic.
11. The system of claim 7 , wherein the focusing reflective surface is generally spherical.
12. The system of claim 1 , wherein each of the plurality of LEDs of the first light-emitting diode (LED) array includes a zero-power lens.
13. The system of claim 1 , wherein the at least one LED of the second LED array includes a focusing lens.