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US Patent 11751754 Objective optical system, image pickup apparatus, endoscope and endoscope system

Patent 11751754 was granted and assigned to Olympus Group on September, 2023 by the United States Patent and Trademark Office.

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An objective optical system includes, in order from an object: a first lens group having a negative refractive power, a second lens group having a positive refractive power, and a third lens group having a positive refractive power. The second lens group includes an aperture stop and moves at a time of changing magnification.

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