The present invention provides novel hybrid polymer optical alignment layers for inducing alignment of a liquid crystal medium. The devices can be used in vascular channels, urinary tracts, biliary ducts and the like, and filter emboli and other debris generated at a treatment site. Two mutually isolated flow air bypass paths corresponding to the flow air heat exchange paths also communicate the impeller with the respective outlet ports. Server access to an identified list is only authorized when it corresponds to a signature which is found among the determined signatures in the card and which is identical to the received signature. The cartridge that is inserted in the case is attracted by a magnet mounted on the vertically movable table and having stronger magnetic forces than the magnet, and is released from the magnetic attraction by the magnet and loaded into the case.