Abstract: The data transfer between an initiator and a target, interconnected over an IEEE1394 interface, is to be improved in efficiency. At the time of login, the buffer information of the targets 11 to 14 is acquired by an initiator 10. Based on the buffer information, acquired by the initiator 10, a data transfer table, at least including the node ID information of the targets 11 to 14, address information of the buffer memory and the data transmission/receipt specifying information for specifying the transmission or receipt of the data, is formulated. The data transfer table, formulated by the initiator, is supplied to each target. When a signal instructing the transfer of the data is input, handshaking is performed between the initiator 10 and the targets 11 to 14, based on the predetermined information appended to the transfer protocol of the interface, to effect the data transfer based on the data transfer table.

Abstract: A displacement detection device having excellent stability with the lapse of time and suitable for reduction in size and weight includes: a light source for emitting light; polarizing light splitting unit for splitting the light emitted from the light source into two light beams having difference polarized components, radiating the two light beams to an external optical system, and combining the two light beams reflected by the external optical system to generate combined light; a phase plate provided between the light source and the polarizing light splitting unit and adapted for changing the polarization state of the light emitted from the light source and leading the light to the polarizing light splitting unit; light splitting films for splitting the combined light generated by the polarizing light splitting unit into plural light beams; polarizing units for transmitting only a predetermined polarized components of the split combined light beams; and light-receiving elements for photoelectrically converti

Abstract: In a magnetic sensor (1) including a substrate (10) having a magnetism-sensitive element (11) formed thereon, a hard membrane (14) is formed on the outermost surface, an organic film (13) to relieve the stress caused by the hard membrane (14) is formed under the hard membrane (14), and an inorganic film (12) to relieve the stress caused by the organic film (13) is formed between the organic film (13) and magnetism-sensitive element (11). Also, an intermediate film formed from an element having a large force of bonding to carbon may be formed between the organic film (13) and hard membrane (14). Thus, the magnetic sensor (MR sensor, for example) can be protected against an external shock.