PROTECTIVE DEVICES FOR GAMMA-RADIOGRAPHY Russian patent published in 2018 - IPC G21F3/00 G21F5/02 

FIELD: radio engineering.

SUBSTANCE: invention relates to a radiographic screen with a channel. Radiological screen contains the first half representing the first surface; the second half represents the second surface. Second surface is configured to engage with the first surface in a first position and be separated from the first surface in a second position. First half comprises the first convex curved projection and the first concave curved cut recess, and the second half comprises the second convex curved projection and the second concave curved cut recess, while in the first position, the first convex curved projection is engaged within the second concave curved cut recess and the second convex curved projection is engaged within the first concave curved cut recess, whereby the first half and the second half have one degree of freedom for relative movement.

EFFECT: invention makes it possible to provide sufficient shielding to prevent a direct radiation path.

10 cl, 11 dwg