Optical viewing device
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United States of America Patent
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Nov 15, 1988
Grant Date -
N/A
app pub date -
Apr 28, 1987
filing date -
Apr 28, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for viewing a region within a body cavity or the like. The apparatus includes an elongate light pipe having a distal end and a proximal end, which light pipe illuminates the region to be viewed adjacent the distal end of the pipe. An objective lens system is carried at that distal end which in a preferred embodiment forms a focused real image of the illuminated region. This image is transmitted to the viewer through a series of relay lenses and, at the proximal end of the apparatus, through a viewing lens system. The light pipe and the lenses are composed of a polymeric material such as styrene, polycarbonate, acrylic, or the like, and are preferably aspheric lenses.
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