A catadioptric magnifier with two magnifications for microfiche reading

We have considered the possibility of using four internal reflections in a single lens to reduce its effective focal length by a very large factor. Hence, by using very shallow curvatures on the lens surfaces, it is possible to obtain very high visual magnification for viewing transmission objects s...

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Veröffentlicht in:Optics and laser technology 1984-10, Vol.16 (5), p.258-260
Hauptverfasser: Murty, M.V.R.K., Moya-Cessa, J.
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creator Murty, M.V.R.K.
Moya-Cessa, J.
description We have considered the possibility of using four internal reflections in a single lens to reduce its effective focal length by a very large factor. Hence, by using very shallow curvatures on the lens surfaces, it is possible to obtain very high visual magnification for viewing transmission objects such as microfiche. Some details of such a system are presented here, where a lower magnification is obtained for two internal reflections and a higher magnification for four internal reflections.
doi_str_mv 10.1016/0030-3992(84)90008-2
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source Elsevier ScienceDirect Journals Complete
subjects Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Lenses, prisms, and mirrors
microfiche readers
Optical elements, devices, and systems
optical instruments
Optics
Physics
systems design
title A catadioptric magnifier with two magnifications for microfiche reading
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