Entry Source: The Complete James Bond Movie Encyclopedia by Steven Jay Rubin

Blofeld‘s fussy laser specialist, portrayed by Joseph Furst, in Diamonds Are Forever. Another in a long series of renegade European scientists employed by SPECTRE to help blackmail the world, Metz has designed a laser satellite powered by a huge diamond solar shield. A bit of a pacifist, he hopes that the world will meet Blofeld’s demands this time.

Unfortunately, on the oil rig at the film’s conclusion, the SPECTRE chief has his typical bout of last-minute rage and insanity, and orders the satellite to open fire anyway. Fortunately, Bond (SEAN CONNERY) and attacking CIA helicopters sabotage the controls, and the satellite is rendered harmless.