Television camera
First Claim
1. A television camera comprising at least one pick-up tube, a dual mu-metal shielding against magnetism provided at the pick-up tube and having first and second shielding members, and an objective lens, the pick-up tube being arranged in the camera in an optical path subsequent to the lens, characterized in that the camera which is in the form of a colour television camera comprising a plurality of pick-up tubes, comprises at least one pick-up tube having a single mu-metal shielding in addition to the at least one pick-up tube having the dual mu-metal shielding, the axial axis of the at least one pick-up tube with the dual mu-metal shielding extending, when the optical axis of the objective lens extends substantially horizontally, substantially in a vertical direction and the axial axis of the at least one pick-up tube with the single mu-metal shielding extending substantially in a horizontal direction.
1 Assignment
0 Petitions
Accused Products
Abstract
A color television camera has several pick-up tubes (T1, T2, T3) which are arranged substantially horizontally or vertically in the camera. The pick-up tubes (T) each have a mu-metal shielding (mu1) against magnetism. Each substantially vertically arranged pick-up tube (T2, T3) has an additional second mu-metal shielding (mu2, mu2'"'"'), which is absent for the horizontally arranged tube. The second shielding may be in the form of a single plate (mu2), overlapping the pick-up tube or two plates (mu2, mu2'"'"') arranged on both sides of the pick-up tube and overlapping the tube. Deflection errors, especially in the corners of the television pictures caused by magnetic fields, are reduced to acceptable values.
96 Citations
8 Claims
- 1. A television camera comprising at least one pick-up tube, a dual mu-metal shielding against magnetism provided at the pick-up tube and having first and second shielding members, and an objective lens, the pick-up tube being arranged in the camera in an optical path subsequent to the lens, characterized in that the camera which is in the form of a colour television camera comprising a plurality of pick-up tubes, comprises at least one pick-up tube having a single mu-metal shielding in addition to the at least one pick-up tube having the dual mu-metal shielding, the axial axis of the at least one pick-up tube with the dual mu-metal shielding extending, when the optical axis of the objective lens extends substantially horizontally, substantially in a vertical direction and the axial axis of the at least one pick-up tube with the single mu-metal shielding extending substantially in a horizontal direction.
Specification