Optical field changing device for use in e.g. thermal camera, has magazine rotationally mounted around rotational axis, and optical paths asymmetrically disposed on magazine such that two rotational angles of magazine are different

摘要

The device has a spherical shaped magazine (5) rotationally mounted around a rotational axis confound with a symmetrical axis of the magazine. The magazine is inclined with respect to a fixed main optical axis (X). Optical paths (A, B, C) are asymmetrically disposed on the magazine such that two rotational angles of the magazine are different. The optical paths respectively have concurrent optical axes inclined in same angle with respect to the rotational axis.