Device for Reading Out Exposed Imaging Plates

Abstract

A combined device ( 10 ) for reading out and erasing imaging plates ( 30 ) comprises an eraser ( 14 ) disposed down-stream of a readout unit ( 12 ) at a short distance thereof, said eraser being separated from the readout unit ( 12 ) by a light barrier ( 46 ).

1 . A device for reading out exposed imaging plates, with retaining means for retaining in given geometry an imaging plate to be read out, with a reading unit which generates a reading light beam which is moved in a first scanning direction and exhibits detection means for detecting fluorescent light released in the imaging plate by the reading beam, and with a drive device for generating a relative motion between the imaging plate and the reading unit in a second scanning direction, different from the first scanning direction, wherein an erasing unit is arranged in the direction of the second scanning direction behind the reading unit and aligned with the latter, in that the drive device is designed in such a way that it also extends over the erasing unit, and in that a light barrier is arranged between the reading unit and the erasing unit. 
   
   
       2 . The device of  claim 1 , wherein the light-source exhibits a bundle of erasing-light-absorbing lamellae which are arranged in parallel, with a spacing, the edges of which pointing towards the imaging plate are spaced from the trajectory of the imaging plate. 
   
   
       3 . The device of  claim 2 , wherein the lamellae also absorb fluorescent light. 
   
   
       4 . The device of  claim 2 , wherein the clearance between the edges of at least some of the lamellae facing towards the imaging plate amounts to about 0.05 mm to about 0.2 mm. 
   
   
       5 . The device of  claim 2 , wherein the edges of at least some of the lamellae facing towards the trajectory of the imaging plate are sharpened. 
   
   
       6 . The device of  claim 2 , wherein the lamellae are spaced by intermediate second lamellae, the edges of which facing towards the imaging plate exhibit greater spacing from the imaging plate than the corresponding edges of the first lamellae. 
   
   
       7 . The device of  claim 6 , wherein the spacing between the free edges of the second lamellae and the trajectory of the imaging plate amounts to at least 10 times the spacing between the free edges of the first lamellae and the trajectory of the imaging plate. 
   
   
       8 . The device of  claim 6 , wherein the second lamellae exhibit interruptions which are connected to a cooling-gas distributor space. 
   
   
       9 . The device of  claim 2 , wherein the lamellae exhibit regions pressed out of their plane, via which they are spaced. 
   
   
       10 . The device of  claim 9 , wherein in the peripheral direction the lamellae are provided symmetrically with regions pressed out of their plane, and the pressed-out regions of adjacent lamellae are offset in relation to one another. 
   
   
       11 . The device of  claim 8 , wherein the peripheral surface of the lamellar bundle are connected to a distributor space for cooling gas. 
   
   
       12 . The device of  claim 1 , wherein the light barrier includes a pile made of absorbent textile material. 
   
   
       13 . The device of  claim 12 , wherein the pile is a pile-loop fluorine. 
   
   
       14 . The device of  claim 12 , wherein the pile is produced from a material that absorbs in volume. 
   
   
       15 . The device of  claim 14 , wherein the absorbent material is frosted on its outside. 
   
   
       16 . The device of  claim 12 , wherein the outer surface of the textile material is studded with absorbent particles. 
   
   
       17 . The device of  claim 1 , further comprising a light-source of the erasing unit including a fluorescent lamp. 
   
   
       18 . The device of  claim 1 , further comprising a light-source of the erasing unit including a plurality of light-emitting diodes which are spaced in such a manner that their light cones overlap in the surface of the plate. 
   
   
       19 . The device of  claim 18 , wherein the light-emitting diodes are arranged in several rows spaced in the conveying direction of the imaging plate, and the diodes of consecutive rows are offset in relation to one another. 
   
   
       20 . The device of  claim 18 , wherein the light-emitting diodes are arranged on a carrying body which is driven in the direction perpendicular to the conveying direction of the imaging plates. 
   
   
       21 . The device of  claim 1 , wherein in the region between the reading unit and the erasing unit a guidance unit is provided which predetermines a step in the conveying path of the imaging plate. 
   
   
       22 . The device of  claim 1 , wherein it exhibits a light-sensitive element which has erasing light applied to it. 
   
   
       23 . The device of  claim 22 , further comprising a device for regulating the luminous flux emitted by the erasing-light source, which operates as a function of the output signal of the light-sensitive element which has erasing light applied to it. 
   
   
       24 . The device of  claim 1 , wherein the spectrum is set to the maximum of the absorption of the storage centres of the imaging plate. 
   
   
       25 . The device of  claim 1 , further comprising a means for collecting the erasing light emitted by the erasing unit onto that spatial region in which an imaging plate is moved past the erasing unit. 
   
   
       26 . The device of  claim 17 , wherein the walls of the erasing unit surrounding the erasing-light source are designed to be diffusely reflecting. 
   
   
       27 . The device of  claim 17 , wherein the walls of the erasing unit surrounding the erasing-light source are provided with a coating that reflects erasing light well.