2-Pack Fresnel Lens Φ240mm(9.45") Focal Length 300mm Acrylic Ultrathin Magnifier for Solar Heating,Solar Concentrator,fire Starter,spot Lens,Visual Education (Focal Length 300mm)

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2-Pack Fresnel Lens Φ240mm(9.45") Focal Length Features

• 2pcs fresnel lenses Φ240mm with focal length 300mm

• Thickness:2mm, Material: PMMA (Acrylic)

• Visual Aid for education - Great for solar heating experiment, DIY Solar Cooking, DIY Solar Heater, For Scientific Research

• High light transmittance, High efficiency in focusing, High precision.

• We are professional factory for high-precision optical lens, fresnel lens, solar lenes.

About 2-Pack Fresnel Lens Φ240mm(9.45") Focal Length

Size: Φ240mm Thickness: 2mm Material: PMMA Groove pitch: 0.5mm Transmission (%): 92 (from 400-1100nm) Index of Refraction nd : 1.491 Operating Temperature (°C): 80 (Maximum) Fresnel lenses are most used in solar concentration, solar heating and light gathering applications. Or cooking outside as a fire starter. Fresnel lenses can also be used as projection lenses or magnifiers. They are great for magnifying print in books, magazines, maps, telephone numbers, recipes, etc. They are great as a gift or toy to childrens who need visual aid.