Optical system for TV camera

Abstract

An optical system for a TV camera is provided which includes an escutcheon, an FB adjusting ring, a bracket, and retainers. The escutcheon has disposed therein a lens. The FB adjusting ring is installed on the escutcheon to be movable along an optical axis of the optical system. The bracket has mounted thereon an image pick-up device and is disposed to be movable to or away from the escutcheon according to the movement of the FB adjusting ring for adjusting an flange back (FB) distance. The retainers retain the bracket on the escutcheon at two support points in optical alignment with each other. Each of the retainer includes a screw and a spring. The screw fastens the bracket to the escutcheon. The spring urges the bracket against the escutcheon. With this arrangement, the adjustment of the FB distance is achieved by rotating the FB adjusting ring without any backlash in movement of the bracket.

Dependencies are inferred from the claim text.