Half a croissant, on a plate, with a sign in front of it saying '50c'
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Perfect Shade Tree

For pin hole cameraing
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The shade underneath trees during eclipses is pretty incredible because it becomes apparent that all of those little dapples of light are actually images, since every one of them becomes a crescent rather than a circle.

So this idea is for a computer controlled "tree" that would exploit the ability of the pin holes created by the spaces between its leaves to act as lenses, to create organized visual phenomena in its shade.

JesusHChrist, Jan 04 2016


       Point of correction: each pinhole IS the equivalent of a lens. It appears that what you want is to consolidate all the individual pinhole-lens images, into a single image.   

       Well, considering that from a given point under the tree, each pinhole among the leaves is pointing in a different direction, so what you would be creating is a very wide-field view, without much detail. If you carpeted the ground under the tree with imaging devices, then you could get multiple pinhole views of particular objects, and so more detail   

       It also sort-of means you will be using the tree to study things in the sky. I suspect most ordinary telescopes will give you better results, but, hey, this is the HalfBakery, and ineffectual notions are welcome.
Vernon, Jan 04 2016

       - not entirely unlike an insect's compound eye?
hippo, Jan 04 2016

       Actually, that’s one of the things that annoy me in films and suchlike, where they portray what it must be like to see through an insect compound eye. They’ll show a special effect that looks like thousands of replicated partial images as if they were seen through a cluster of lenses in a format like an insect’s compound eye.   

       If one were to think about it, the insect itself will not see things this way. The brain would stitch together the compound images to form a seamless single image, much like our two eyes form one perception, and much like our retinal cells are not perceived as separate light points. Insect vision would be a single impression of an image, the same as any other animal with eyes. What may vary, of course, is the bandwidth, the focal discrimination, the light sensitivity, which in the case of marine animals is limited by distance. But there’s absolutely no point in an insect “seeing” a disparate collection of partial images, especially with honeycomb shaped edges.   

       By the way, the insect eye is an interesting evolution, as current thinking suggests that all insects may stem from species which may have diverged from a life form that itself is blind (living in subterranean saline cave environments).
Ian Tindale, Jan 04 2016


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