3.0" x 3.0", 7.9" Focal Length, Fresnel Lens | Edmund Optics
Linear Fresnel Lens 300 * 300mm Focal Length 300mm Optical Linear Lens, Focal is a line, Acrylic lenses, small focus high light transmittance By SIX SEASONS TECH: Amazon.com: Industrial & Scientific
Fresnel lens | Britannica
Fresnel lenses – IODA s.r.l. – Design, development and production of optical systems, production of custom lenses for the lighting market