1-Pack Round Fresnel Lens Diameter 500MM Focal Length 500mm Acrylic Large Fresnel Lenses for solar collecting,magnifying,cooking outside,solar heating,solar projector fire starter
Size: Î500mm Focal length: 500mm Thickness: 3mm Material: PMMA Groove pitch: 0.5mm Material : acrylic (pmma) Transmission (%): 92 (from 400-1100nm) Index of Refraction nd : 1.491 Operating Temperature (): 80 (Maximum)
Survival Fire Starter Product Features:
1pcs large fresnel lens
Size:Î500mm, Focal length:500mm, Thickness:3mm, Material:PMMA(acrylic)
Visual Aid for education – Great for Solar Concentrator, DIY Solar Heater, Solar Project, For Scientific Research
High light transmittance, High efficiency in focusing
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