An optofluidic tunable Fresnel lens for spatial focal control based on electrowetting-on-dielectric (EWOD) - ScienceDirect
Fresnel Lens
PDF) Positive Focal Length Fresnel Lens Used as a Collector Positive Focal Length Fresnel Lens Used as a Collimator Negative Focal Length Fresnel Lens Used as a Diverger HIGH QUALITY FRESNEL LENSES
fresnel lens solar short Focal length 25mm Diameter 60mm Fresnel Lens small size fresnel lens thickness
Optical Part For Optical Fresnel Lens Diameter 40mm Lens, Short Focal Length Lens Sample Order (Color: Transparent/Diameter: 40mm/Focal Length: 35mm/Thickness: 0.3mm) - Amazon.com
Fresnel Lenses | Shanghai Optics
Fresnel lens - YouTube
Applications of the Fresnel Lens
optics - Why does shorter focal length result in greater beam divergence? - Physics Stack Exchange