Abstract
Biocular magnifiers are in widespread use in night vision equipment. These bioculars, used to view the outputs of image intensifier tubes, are typically of x5 magnification. This magnification, and consequent upper limit on biocular diameter, has precluded their use for applications such as the relaxed viewing of CRT displays. Conventional glass bioculars scaled-up in diameter could be used to magnify. small CRTs but would, have no size or cost advantage relative to a large diameter CRT. Recently, however, large diameter but compact biocular magnifiers have been designed, using inexpensive and lightweight optical components such as plastic aspheric and Fresnel lenses. The following describes these designs and exawines their characteristics.© (1983) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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