Eyepiece lens system and image observation device
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United States of America Patent
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Apr 26, 2016
Grant Date -
Aug 7, 2014
app pub date -
Aug 22, 2012
filing date -
Aug 25, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
An eyepiece lens system forms a magnified virtual image of an object to be observed, the system including: a first group disposed adjacent to an image display device and having negative refractive power; and a second group disposed adjacent to the first group on a side closer to an eye and having positive refractive power; the first group including a cemented doublet lens of a biconcave lens and a biconvex lens, the second group including two or three positive lenses, being telecentric on the object side. The eyepiece lens system has satisfactory telecentricity on the object side and satisfactorily corrects aberration.
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