PHOSPHOR SCREEN AND IMAGING ASSEMBLY

• Main Authors: LANEY, THOMAS, MILES, STEKLENSKI, DAVID, JOHN
• Format: Patent
• Language: English; French
• Published: 29.09.2005
• Edition: 7
• Subjects: AUXILIARY PROCESSES IN PHOTOGRAPHY; CINEMATOGRAPHY; ELECTROGRAPHY; GAMMA RAY OR X-RAY MICROSCOPES; HOLOGRAPHY; IRRADIATION DEVICES; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES; PHOTOGRAPHY; PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHYSICS; TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOTOTHERWISE PROVIDED FOR

A phosphor screen comprises an inorganic phosphor capable of absorbing X-rays and emitting electromagnetic radiation having a wavelength greater than 300 nm. The phosphor is disposed on a support that has a reflective substrate (11) comprising a continuous polyester first phase (12) and a second phase dispersed within the continuous polyester first phase. The second phase contains microvoids (14) that in turn contain barium sulfate particles (16). This support provides improved reflectivity particularly at shorter wavelengths. L'invention concerne un écran fluorescent comprenant un phosphore inorganique pouvant absorber les rayons X et émettre un rayonnement électromagnétique d'une longueur d'onde supérieure à 300 nm. Le phosphore est disposé sur un support présentant un substrat comprenant une première phase continue de polyester et une seconde phase dispersée dans la première phase continue de polyester. La seconde phase contient des microvides contenant des particules de sulfate de baryum. Ce support permet d'obtenir une réflectivité améliorée, en particulier à des longueurs d'ondes plus courtes.