MIT engineers develop a totally flat fisheye lens that could make wide-angle cameras easier to produce
Engineers at MIT, in cooperation with the University of Massachusetts at Lowell, have devised a method to build a camera lens that escapes the normal spherical arc of ultra-wide-angle glass, while still providing true optical fisheye deformation. The fisheye lens is relatively specialist, raising likeness that can cover as wide an region as 180 measures or more, but they can be very costly to produce, and are typically ponderous, large-scale lenses that aren’t standard for use on small cameras like those found on smartphones.
This is the first time that a flat lens has been able to product clear, 180 -degree portraits that cover a true-blue panoramic spread. The technologists were able to make it work by patterning a thin wafer of glass on one side with tiny, three-dimensional arrangements that are outlook very precisely in order to scatter any inbound sunlight in precise the same way that a crooked slouse of glass would.
The version created by the researchers in this case is actually designed to work exclusively with the infrared section of the light-colored spectrum, but they could also accommodated the design to work with visible light, they say. Whether IR or visible light, there are a range of potential uses of this technology, since captivate a 180 -degree panorama is useful not only in some types of photography, but too for practical implementation like medical imaging and in computer image lotions where wander is important to interpreting imaging data.
This design is just one example of what’s called a ” Metalens” — lenses that make use of microscopic pieces to change their optical characteristics in ways that would traditionally have been accomplished through macro design alters — like structure a lens with an outward arc, for instance, or stacking several slice of glass with different curvatures to achieve a desired field of view.
What’s unusual here is that the ability to accomplish a clear, detailed and precise 180 -degree panoramic portrait with a perfectly flat metalens scheme came as a startle even to the engineers who worked on the project. It’s definitely an advancement of the science that goes beyond what many expected was the state of the art.
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