Abstract: A metal identifying device precisely identifies a metal material in a metal member having a plurality of through-hole portions penetrating through the metal member. The metal identifying device of the present invention includes a measurement unit that obtains a measurement value by measuring an electrical property and/or optical property of a test object, a threshold value determination unit that determines a threshold value with use of a reference value obtained by measuring the property of a metal member having a metal composition to be identified and information indicating a ratio of the through-hole portions to a measurement area in the test object and/or information indicating a configuration of the through-hole portion, and a comparison/identification unit that identifies a metal composition of the test object by comparing the measurement value and the threshold value.

Abstract: A metal identifying device precisely identifies a metal material in a metal member having a plurality of through-hole portions penetrating through the metal member. The metal identifying device of the present invention includes a measurement unit that obtains a measurement value by measuring an electrical property and/or optical property of a test object, a threshold value determination unit that determines a threshold value with use of a reference value obtained by measuring the property of a metal member having a metal composition to be identified and information indicating a ratio of the through-hole portions to a measurement area in the test object and/or information indicating a configuration of the through-hole portion, and a comparison/identification unit that identifies a metal composition of the test object by comparing the measurement value and the threshold value.

Abstract: A magnetic tape apparatus of the present invention includes an accessor mechanism movable in a Y direction in response to a command received from a host and a hand mechanism mounted on the accessor mechanism and movable in the X direction. Address charts are provided on the individual cell for accommodating a cartridge storing a recording medium therein. The address charts serve as indices indicative of positions of the cell in the X direction and the Y direction. Reduction optics is mounted on the hand mechanism and includes a light source, a monodimensional CCD (Charge Coupled Device), and a lens. The apparatus is miniature, low cost, high performance and simple and capable of accurately sensing a position with reliability.