Patent ID: 7982202

Claim:
A scanning apparatus for obtaining an image from a phosphor sheet comprising: a cylindrical drum having an inner axis and having an inner surface that is concave with respect to the axis; a light collector coupled to a transport mechanism that is actuable to translate the light collector along a direction parallel to the axis, the light collector comprising: a beam generator comprising a light source and a beam deflector that is actuable to provide a rotating scanning beam; a filter disposed to block light from said light source; and first and second cylindrical hoops circumferentially disposed about the axis and spaced apart from each other along the direction of the axis to define a slot aligned with the rotating scanning beam as it scans the phosphor sheet; and at least one light detector behind said filter disposed to detect light stimulated from the phosphor sheet by the scanning beam, where said filter is configured to mount directly in front of the at least one detector and to extend beyond the at least one detector, further comprising a reflective surface mounted behind the filter at a position of the filter that extends beyond the input face of the at least one light detector.