Importance

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Abstract

Provided are a lens device capable of preventing a focus shift of an imaging optical system due to heat without reducing a degree of freedom of design, an imaging device comprising the same, and a focus shift correction method of a lens device. A lens device 100 includes an imaging optical system 20 that includes a plurality of lenses, a lens barrel 10 that accommodates the imaging optical system 20, a temperature sensor 30 that is provided outside the lens barrel 10 to detect a temperature of the lens barrel 10, a temperature sensor 50 that is provided outside the lens barrel 10 to detect a temperature of a member 40 of which a temperature characteristic indicating a temperature change with a time change is different from a temperature characteristic of the lens barrel 10, and a focus correction unit 60 that corrects a focus shift of the imaging optical system 20 by controlling a relay lens 25 as a correction lens included in the imaging optical system 20 based on temperature information items respectively detected by the temperature sensor 30 and the temperature sensor 50.

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First Claim