Six Seasons Fresnel Lens Magnifier, 200mm Diameter, 200mm Focal Length, Acrylic Lens, Physics Classroom, Solar Heating, Magnifying

1-Pack Round Fresnel Lens Magnifier Size:Φ200mm, Thickness:2mm, Material: PMMA (Acrylic) High Light Transmittance, High Efficiency in Focusing, High Precision. Great for Physics Classroom Education, Solar Heating Experiment, DIY Solar Project, Magnifying, Scientific Research Optical education: The special structure of the Fresnel lens can adjust the parallel light or the focused light, so that the light is effectively directed to a specific narrow area to achieve the focusing effect of light. The children were curious about it.This is not only a base, but also a knowledge point that children need to learn. Six Seasons is a Professional Manufacturer of Fresnel Lens and Optical Lens, If you have size customization needs, welcome to leave a message to us Tips: Wear sunglasses when using, so that the light is not too strong to damage the eyes