Hypercentric optics: A camera lens that can see behind objects

Telecentric and hypercentric optics are very different from our eyes or normal camera lenses. They have "negative" perspective or no perspective, respectively, leading to very unusual images. In this video I show how to use a common fresnel lens in the creation of your own telecentric optical system. Fresnel lens, 300mm dia. 200mm FL is sold out... https://www.amazon.com/gp/product/B071ZQL9YZ/ $5 projection lens on eBay: https://www.ebay.com/itm/Delta-108-Projection-Lens-from-U-S-Precision-Lens-inc/264605738684 Good practical discussion of telecentric optics: https://www.lockhaven.edu/~ dsimanek/scenario/labman3/telecen.htm https://www.mii.cz/art?id=626&lang=409&style=4 Idea to use macro tubes for telecentric conversion of normal lenses came from here: http://www.4photos.de/camera-diy/Telecentric-Lens.html In-depth info on telecentric lenses: https://schneiderkreuznach.com/application/files/9715/0781/8897/optical-measurement.pdf Commercial hypercentric and telecentric lens maker: https://lw4u.com/ Paper on making telecentric lenses with fresnel front elements: https://sci-hub.tw/10.1117/12.455256 https://www.patreon.com/AppliedScience

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