A connecting device, usually a small part, designed to join a device or component to a laser, or join devices being used with the laser, or to make any of these devices compatible so that they mate together (e.g., a laser contact probe from one manufacturer...
An optical device designed to connect a camera (moving- or still-image) to a non-video endoscope (rigid or flexible), especially when the devices are from different manufacturers. It may be referred to as a coupler. This is a reusable device.