Zoom objective lens
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United States of America Patent
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Jul 9, 2019
Grant Date -
Jun 22, 2017
app pub date -
Dec 7, 2016
filing date -
Dec 17, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to a zoom objective lens with continuously adjustable magnification, comprising five lens groups, where the first lens group, the second lens group and the fifth lens group are fixed in relation to an object. The third lens group and the fourth lens group are axially displaceable. The following conditions apply to the lens:
- the variable air gap between the second lens group and the third lens group decreases or has a turning point with a transition from a low to a high magnification β,the refractive power of the second, third and fifth lens groups is positive andthe refractive power of the fourth lens group is negative.
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