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1. (WO2018042759) LENS DEVICE, IMAGING DEVICE, AND METHOD FOR CORRECTING DEFOCUS IN LENS DEVICE

Pub. No.:    WO/2018/042759    International Application No.:    PCT/JP2017/017097
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Sat Apr 29 01:59:59 CEST 2017
IPC: G02B 7/02
Applicants: FUJIFILM CORPORATION
富士フイルム株式会社
Inventors: WADA Tetsu
和田 哲
Title: LENS DEVICE, IMAGING DEVICE, AND METHOD FOR CORRECTING DEFOCUS IN LENS DEVICE
Abstract:
Provided are a lens device, an imaging device provided with the same, and a method for correcting defocus in a lens device, whereby defocus in an imaging optical system due to heat can be prevented without decreasing the degree of freedom of design thereof. A lens device 100 is provided with: an imaging optical system 20 including a plurality of lenses; a lens barrel 10 for accommodating the imaging optical system 20; a temperature sensor 30 for detecting the temperature of the lens barrel 10, the temperature sensor 30 being provided outside of the lens barrel 10; a temperature sensor 50 for detecting the temperature of a member 40 for which a temperature characteristic indicating a temperature change with respect to a time change differs from that of the lens barrel 10, the temperature sensor 50 being provided outside of the lens barrel 10; and a focal point correction unit 60 for controlling a relay lens 25 which is a corrective lens included in the imaging optical system 20 on the basis of temperature information detected by each of the temperature sensor 30 and the temperature sensor 50 and correcting defocus in the imaging optical system 20.