An apparatus that includes an exposure system for exposing a substrate to an energy pattern, a vacuum chamber having an outside wall including first and second units which can be separated from each other, and a first anti-vibration mount being supported by the first unit, and for supporting a first constituent element of the exposure system. Indices of the thumbnails on are displayed on a display screen of the mobile device, and thumbnails from the displayed thumbnail buffer are read if the thumbnails correspond to the indices are found in the displayed thumbnail buffer. The optical pickup further includes a detector for sensing the write and read beams reflected from the storage medium. The light-directing panel of the present invention is at least partially light reflective and at least partially light passing.