Eyepiece device for a surgical instrument
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United States of America Patent
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Aug 21, 2017
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Feb 25, 2015
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Abstract
An eyepiece device for a surgical instrument, the eyepiece device including: an eyepiece frame; and at least one optical unit accommodated in the eyepiece frame, wherein the at least one optical unit comprises at least one first optical element and a second optical element connected with the at least one first optical element, wherein the second optical element is formed from a second material with abnormal dispersion and the first and the second optical elements together correct chromatic aberration; wherein the eyepiece frame comprises an expansion chamber for at least the second optical element, the expansion chamber forming an installation space for at least the second optical element in a radial direction.
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