Fresnel Lens for Shortest DIY Projector Focal Length 220mm India 1 X Fresnel Lens F220

1 X Fresnel Lens F220 mm

We have thoroughly tested this 200W LED with our Heat sink in Indian weather conditions and found very successful

LED Chip Dimension: 19mm X 11mm

with step wise discontinuities between them

Lumins/Watt : 120-130 LM/W

Fresnel Lens for Shortest DIY Projector Focal Length 220mm India 1 X Fresnel Lens F220The Fresnel lens reduces the amount of material required compared to a conventional lens by dividing the lens into a set of concentric annular sections. An ideal Fresnel lens would have infinitely many such sections. In each section, the overall thickness is decreased compared to an equivalent simple lens. This effectively divides the continuous surface of a standard lens into a set of surfaces of the same curvature, with step wise discontinuities