How Does a Fresnel Lens Work? The Magic Behind the Glass

I have a thin piece of plastic mounted on the back window of my RV. It magnifies things so I can see better when I'm backing up. How can such a thin piece of plastic magnify things? A regular glass magnifying lens would have to be curved on both sides and much thicker.

Six Seasons 5-Pack Fresnel Lens Φ50mm(1.97) Focal

2pcs New Small Fresnel Lens Diameter 80mm Focal Length 70 Mm 35mm

Report: emerging optics to displace Fresnel lenses in XR headsets

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Fresnel Lenses How They Work – How I See It

what is a fresnel lens VY Optoelectronics Co.,Ltd.

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Round Glass Spotlight Fresnel Lens IP23 Protection Grade Tungsten

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How to make a Fresnel lens? Which materials are best - Quora

The Remarkable Fresnel Lens

The Origin Of The Fresnel Lens

Wide field light-sheet microscopy with lens-axicon controlled two

Adding a fresnel lens

Advantages of Fresnel Lenses