FAR-INFRARED CAMERA LENS BARREL, AND FAR-INFRARED CAMERA LENS UNIT

摘要

PROBLEM TO BE SOLVED: To provide a far-infrared camera lens barrel and a far-infrared camera lens unit that enable accurate detection of an amount of a change in a focal distance of a lens by highly accurately detecting a temperature of a far-infrared lens, and enable a correction of the focal distance to be appropriately performed.;SOLUTION: A far-infrared camera lens barrel includes: at least two far-infrared transmission lenses; and a temperature sensor detecting a temperature of the far-infrared transmission lenses inside the far-infrared camera lens barrel. The far-infrared camera lens barrel is employed that has the lens barrel sealed so as to reduce a local variation of an internal temperature, and has the temperature sensor arranged between two far-infrared transmission lenses mounted to both ends of the subject side and the image plane side, and at an inner face of a center area in a longitudinal direction of the lens barrel.;COPYRIGHT: (C)2015,JPO&INPIT