A GIANT Fresnel Lens EXPERIMENT | The Backyard Scientist

ARCHIMEDES DEATH RAY AKA FRESNEL LENS‼️ - 🪞 Archimedes’ Death (or Heat) Ray is a device that Archimedes is purported to have used mirrors to reflect the sun to a single focal point. In order to burn attacking Roman ships during, and around the Siege of Syracuse (c. 214–212 BC). It does not appear in the surviving works of Archimedes, but is described by historical accounts many years after the siege. The 2nd century AD author Lucian wrote that during the Siege of Syracuse, Archimedes destroyed

[#ELEGOOSaturn2] [Fresnel Collimating Light Source] Under the LCD screen, #ELEGOOSaturn2 8K boasts the industry's first combination optical design of COB (Chip On Board) and Fresnel Collimating Light Source(FCLS), a patented technology that was independently invented by ELEGOO R&D team. A Fresnel lens, also known as the threaded lens, is made of optical grade PMMA material, has a high light transmission and can distribute the UV light very evenly. It is simple, with easy maintenance.✅ Compared t