In-the-Spectacle-Lens Telescopic Device for Low Vision

ocular elements we used off-the-shelf components that were available on hand: a 1 inchpolarizing cube, a quarter wave plate, a mirrored planoconvex lens with rectangular shape(8×15mm), and an occluder to increase contrast. The magnification obtained was 2.9×, as theratio of the mirrors’ radii.The folding/erecting flat mirrors described in the terrestrial version were not included so the finalimage was inverted (Fig. 13). The final image was colored since the off-the-shelf beam splitterthat we used was tuned for infrared applications, instead of visible broadband. In Fig. 13c weillustrate Simulvision obtained by simply tilting the ocular beam splitter.Figure 12: A prototype implementing an astronomical Keplerian telescope usingpolarizing beam splitters and spherical mirrors. The objective assembly (top) iscomposed from the magnifying element of a MicroOptical display system whichincludes a polarizing beam splitter, a quarter wave plate, and a spherical mirror (top).The ocular assembly (below) is constructed from a polarizing cube beam splitter, aquarter wave plate and a conventional plano-convex lens that was silvered on theconvex surface. A dark occluder is visible behind the image of the ocular sphericalmirror21