Experimental demonstration of ray-optical refraction with confocal lenslet arrays.
نویسندگان
چکیده
We observe imaging through windows comprising pairs of confocal lenslet arrays that have different focal lengths but that are otherwise identical. Image space is stretched in the longitudinal direction only. Such windows are examples of METATOYs, optical components that can change light-ray direction in ways that appear wave-optically forbidden.
منابع مشابه
Ray-optical refraction with confocal lenslet arrays
Two parallel lenslet arrays with focal lengths f1 and f2 that share a common focal plane (that is, which are separated by a distance f1 + f2) can refract transmitted light rays according to Snell’s law, but with the ‘sin’s replaced with ‘tan’s. This is the case for a limited range of input angles and other conditions. Such confocal lenslet arrays can therefore simulate the interface between opt...
متن کاملGeometric limits to geometric optical imaging with infinite, planar, non-absorbing sheets
New ray-optical elements allow generalized refraction of light rays, but geometry imposes limitations on possible mappings between the positions of an object and its geometric image. Here I study the case of an infinite, planar, non-absorbing sheet that images the entire three-dimensional space. The most general case of such a sheet is equivalent to a thin lens with different objectand image-si...
متن کاملDr TIM: Ray-tracer TIM, with additional specialist scientific capabilities
We describe several extensions to TIM, a raytracing program for ray-optics research. These include relativistic raytracing; simulation of the external appearance of Eaton lenses, Luneburg lenses and generalised focusing gradient-index lens (GGRIN) lenses, which are types of perfect imaging devices; raytracing through interfaces between spaces with different optical metrics; and refraction with ...
متن کاملGeneralized refraction using lenslet arrays
We have recently started to investigate 2D arrays of confocal lens pairs. Miniaturization of the lens pairs can make the array behave ray-optically like a homogeneous medium. Here we generalize the geometry of the lens pairs. These generalisations include a sideways shift of the lens centres and a change in the orientation of both lenses in each pair. We investigate the basic ray optics of the ...
متن کاملStandard and non-standard metarefraction with confocal lenslet arrays
A recent paper demonstrated that two lenslet arrays with focal lengths f1 and f2, separated by f1 + f2, change the direction of transmitted light rays approximately like the interface between isotropic media with refractive indices n1 and n2, where n1/n2 = −f1/f2 [J. Courtial, New J. Phys. 10, 083033 (2008)]. This is true if light passes through corresponding lenslets, that is lenslets that sha...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Optics letters
دوره 35 23 شماره
صفحات -
تاریخ انتشار 2010