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A4 plastic sheet magnifiers are a good version of fresnel lens.
The Fresnel Lens was originally developed by French physicist Augustin-Jean Fresnel. It is a type of compact lens used to project light within a lighthouse.
Fresnel lens
No, -fresnel lenses are in things like searchlights and lighthouses.
Fresnel lens
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What's needed when making a LCD projector are :Samsung 940MW-SVPro Lens Kit (2x Fresnel's and projection lens)Pro ReflectorCeramic Mogul Base400Watt 6500K Metal Halide bulb400Watt MH Electronic Ballast 25 foot HDMI to DVI cable25 foot VGA cable
Fresnel
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It's almost impossible for a person to just make a fresnel lens, it's made in factories, u can FOUND some of them in rear projection tvs
projector have concave or convex
A fresnel lens is a type of magnifying glass itself. NOT the most familiar type like sherlock holmes used. You can find fresnel lenses stuck to the back window of vans, in lighthouse lenses. any magnifying lens that has concentric ridges to achieve the magnification effect only using a thin lens.