Drive device

A drive device comprising:

• a drive motor;
• a transmission having a first rotation shaft driven by a drive force of the drive motor;
• an optical filter extending in a plane perpendicular to an optical axis of the optical filter, the optical filter being configured to rotate around a second rotation shaft different from the first rotation shaft, the second rotation shaft extending in a direction parallel to the optical axis;
• wherein the transmission includes a first groove and a second groove formed continuously with the first groove;
• the optical filter having a protrusion in engagement with the first groove and with the second groove such that rotation of the first rotation shaft moves the protrusion to move the filter from a first position in which the protrusion is in the first groove to a second position in which the protrusion is in the second groove, the second position being different from the first position;
• and
• the first groove extending in a first direction and the second groove extending in a second direction offset from a first direction, the second direction being along a tangent line direction passing through the protrusion that is on a circle having the first rotation shaft at a center and a radius that is a distance between the first rotation shaft and the protrusion, in a state where the filter is moved to the second position.