Downhole cutting tools such as blade mills comprise a body having a first end for connection with a rotating component of a drill string and a cutting end for rotation in unison with the body. The gaming device presents the player with a display having a plurality of symbols and enables the player to choose one or more of the symbols. In this case, for each of the numbers corresponding to the feeding teeth checked through a checking window, positional data of each of the feeding teeth which are a recognition processing result of the recognition processing portion are stored in a memory by using an input device. Further descriptions of that finding, such as dimensional measurements, audio descriptions, 3D rendered snapshots, etc. The memory includes customer account data. For example, the use of elliptical sidewalls and diffraction gratings in conjunction with a lightpipe leads to improvements in collection efficiency.