Final answer:
A lens system is responsible for optically coupling the image intensifier with a TV camera, projecting the amplified image onto the camera's CCD sensor.
Step-by-step explanation:
The mechanism that optically couples the image intensifier with a TV camera is a lens system. Optical devices such as microscopes and cameras often use multiple lens systems to form images. In the case of the image intensifier and TV camera, light is amplified by the image intensifier and then projected onto the camera's sensor, usually a charge-coupled device (CCD), through a lens system.
This allows the captured image to be displayed or recorded for viewing. Each lens element within the system works sequentially, with the image formed by one becoming the object for the next. The cumulative effect of each lens element results in the overall magnification of the system.