Systems for providing an optical rotary joint are provided. In some embodiments, a system comprises: a lens-less optical rotary joint, comprising: a guide ferrule； a rotatable ferrule； a rotatable optical fiber, the rotatable optical fiber passing through the rotatable ferrule and the guide ferrule, the rotatable optical fiber being secured within the rotatable ferrule, and the rotatable optical fiber being freely rotatable within the guide ferrule； and a coupler to secure the guide ferrule and receive a static ferrule including a static optical fiber such that a face of the static optical fiber is proximate a face of the rotatable optical fiber.
