IMAGING DEVICE AND DISTANCE MEASURING DEVICE

An imaging unit includes an imaging element, an imaging optical system that includes an off-axis parabolic mirror, and a driving mechanism. A reflective surface of the off-axis parabolic mirror is configured to face an object. The driving mechanism is configured to change positions of the imaging element and a part of the imaging optical system so as to change an imaging direction of the imaging unit while maintaining a position of a focal point of the off-axis parabolic mirror.