A system and method of providing cost effective litigation support through the use of trained and licensed medical professionals, other than medical doctors, includes building at least one database of information that includes credentials of the medical professionals including schooling and work experiences. In one aspect, characteristic information of a reference object is stored in advance to be used as a landmark for localization, and reference characteristic information is defined by utilizing the stored characteristic information and characteristic information obtained at an initial location of the mobile robot. The optical device further includes a first lateral surface extending between the lower surface and the upper surface and having a second specular layer disposed on at least a portion thereof.