Optical PMMA Acrylic Plastic Fresnel Condensing Lens Key specs Diameter: 255 mm Focal Length: 1000 mm, 400 mm, 90 mm Thickness: 2 mm Why you need this lens clarity and durability: manufactured from optical PMMA acrylic plastic for reliable light transmission. Thin and lightweight: the 2 mm thickness offers a compact solution without adding bulk to your assembly. Efficient light concentration: Fresnel condensing design provides effective light focusing at multiple focal lengths while keeping the profile low. Easy integration: large 255 mm diameter with standard mounting potential supports straightforward incorporation into existing holders and setups. Applications and use scenarios Solar concentration and solar energy projects: focus sunlight onto a receiver in solar thermal systems or DIY solar dishes. Illumination and imaging systems: use to collimate or focus light from LEDs or lamps in compact projection, illumination, or optical experiments. Educational and research settings: demonstrate focusing properties, light gathering, and optical behavior in classroom or lab environments. Key attributes at a glance Material: Optical PMMA acrylic plastic Size: 255 mm diameter, 2 mm thick Focal lengths available: 1000 mm, 400 mm, 90 mm Design: Fresnel condensing lens for lightweight, spacesaving performance