Patent Number: 
Section: claims

1. Screen for converting X-rays into light photons, comprising: a panel and an active layer for the conversion of X-rays into light photons located on one face of the panel, wherein the panel comprises a rigid foam plate that is transparent to X-rays, a first layer of composite material located on a first face of the rigid foam plate and a second layer of composite material located on a second face of the rigid foam plate, parallel to said first face. 2. Screen according to  claim 1 , further comprising a framework located on the circumference of the rigid foam plate. claim 1 3. Screen according to  claim 2 , wherein said framework comprises a matrix or glass or carbon fibres set in resin. claim 2 4. Screen according to  claim 1 , wherein the rigid foam is a high density foam and the composite material comprises a matrix of glass or carbon fibres set in resin. claim 1 5. Screen according to  claim 1 , further comprising: claim 1 a frame located around the face of the panel on which the active layer is located, so that the active layer is located within the interior of the frame. 6. Screen according to  claim 5 , further comprising a layer of tungsten located between the panel and the active layer. claim 5 7. Radiological device comprising a screen for converting X-rays into light photons, including a conversion screen according to any of claims  1 - 6 .