Objective lens unit for endoscope
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United States of America Patent
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Apr 13, 2010
Grant Date -
Aug 12, 2004
app pub date -
Feb 5, 2004
filing date -
Feb 10, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
An objective optical system is configured to be suitable to be implemented at a tip of an endoscope. The objective optical system is provided with a first lens unit having a first lens barrel and a first optical system including plurality of lens elements assembled in the first lens barrel, and a second lens unit having a second lens barrel and a second optical system including a plurality of lens elements. The first lens unit or the second lens unit includes an alignment lens which is movable in a direction perpendicular to the optical axis thereof. The alignment lens is a lens most sensitive with respect to an alignment error among the plurality of lenses included in the first optical system.
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