摘要:
An optical disc apparatus can highly accurately record a hologram representing information on or reproduce such a hologram from an optical disc. When recording information on an optical disc 100, the optical disc apparatus controls the position of an objective lens OL1 according to the outcome of detection of a red reflected light beam Lr2 so as to make the focus Fr thereof follow a target track and it also makes the focus Fb1 of a blue light beam Lb1 agree with a target mark position by the objective lens OL1 and also the focus Fb2 agree with the target mark position by controlling the position of another objective lens OL2 according to the outcome of detection of the blue light beam Lb1 by way of the objective lenses OL1 and OL2 so as to make the focus Fb1 of the blue light beam Lb1 and the focus Fb2 of the blue light beam Lb2 agree with the target mark position and the blue light beam Lb1 and the blue light beam Lb2 interfere with each other. Thus, as a result, the optical disc apparatus can record a recording mark RM at the target mark position.
摘要:
An optical disk apparatus irradiates first and second lights, which are emitted from an identical light source, on a disk-like volumetric recording medium from both sides thereof with first and second object lenses corresponding to the first and second lights, respectively, such that the lights are focused in an identical focal point position and records a standing wave. The optical disk apparatus includes an aberration adding unit that adds complementary aberrations to the first and second lights made incident on the volumetric recording medium, respectively.
摘要:
A solid immersion lens (SIL) is provided. The SIL includes a spherical part, a cone-shaped part, a tip part, and an edge part between the cone-shaped part and the tip part. The edge part includes a curved surface.
摘要:
An optical disk apparatus irradiates first and second lights, which are emitted from an identical light source, on a disk-like volumetric recording medium from both sides thereof with first and second object lenses corresponding to the first and second lights, respectively, such that the lights are focused in an identical focal point position and records a standing wave. The optical disk apparatus includes an aberration adding unit that adds complementary aberrations to the first and second lights made incident on the volumetric recording medium, respectively.
摘要:
With a plurality of memory blocks as a pair, a plurality of pairs of the memory blocks are provided and in a case where a pair of memory blocks is designated as a new boot region, when designating other pair of memory blocks as a boot region, a value obtained by subtracting a predetermined value from an initial value set at the boot area designation flag of the memory block of all the memory block pairs is stored in the boot area designation flag of each memory block of other memory block pair and at the time of booting the system, if values of the boot area designation flags in the memory blocks of other memory block pair are equal and not the initial value, determination is made that a boot program is stored in other memory block pair.
摘要:
A rewrite disable control method for a non-volatile semiconductor storage device is disclosed for relying on a majority decision to determine whether a rewrite is disabled or enabled. A write disable control signal generating circuit reads three write disable flags of the same contents stored in security flag storage areas of three memory blocks, respectively, and makes a majority decision to determine a disable/enable state to establish the logic of a write disable control signal. Even if a power supply is instantaneously interrupted during an erasure of a certain block to cause a change in the security flag associated with one memory block, the security flags stored in the two remaining memory blocks maintain the original values, thereby making it possible to effectively prevent a trouble in which an unintended disable setting is validated. Also, since the disable/enable state is directly set by hardware in accordance with the values of the security flags, a malicious third party can be prevented from rewriting a program using a flash memory writer.
摘要:
A master recording apparatus includes a revolving base (31) for revolving a substrate (1) coated with resist thereon, an irradiating mechanism (32), an elevator mechanism (33) for making the irradiating mechanism (32) capable of moving in a vertical direction and in a surface direction which is perpendicular to the vertical direction relative to the revolving base (31) and a height position displacement mechanism (35) interposing between the irradiating mechanism (32) and the elevator mechanism (33), and in which the irradiating mechanism (32) is connected with the elevator mechanism (33) through the height position displacement mechanism (35) and the irradiating mechanism (32) has such a structure in which at least a converging lens system (36) and a displacement driving mechanism (37) for adjusting a focus are supported by a gas static pressure pad housing (38), in the gas static pressure pad housing (38) a gas feeding pad (39) is disposed facing a bottom surface opposing the substrate and gas is made to be fed between the irradiating mechanism (32) and the said substrate (1) through the gas feeding pad (39), whereby the contact between the substrate and the irradiating mechanism is avoided at a time of carrying out a recording of a predetermined pattern by irradiating a beam.
摘要:
In a light deflecting apparatus including a rotary polygon mirror in which a disc rotary polygon mirror is fixed to a shaft supported by a gas of a predetermined pressure. The rotary polygon mirror is fixed to the circumferential side of a shaft by direct engagement therewith, and compressed air is supplied to the thrust end surface of the rotary polygon mirror, to use the thrust end surface as a thrust bearing. Thereby, the rotary polygon mirror can be rotated with higher running accuracy.
摘要:
IO buffers that operate with an IO power supply system and cut cells that isolate the IO buffers from each other are disposed on the periphery of an always-on power supply area and a power supply cut-off available area. A signal indicating the holding of an IO output(s) output from the always-on power supply area is wired so as to go round the IO buffers and the cut cells. The cut cell includes a level shifter that operates with an IO power supply system. The cut cell shifts the level of signal indicating the holding of IO output so that the signal level conforms to the power supply system of IO buffers, and outputs the resultant signal to the IO buffers.
摘要:
An integrated circuit device contains a flash memory, a flash control unit for controlling the rewriting and reading on the flash memory, and a processor unit. The processor unit includes a normal mode and a fail-safe mode as the operating states. In normal mode, when a defect is detected during the verify operation after writing data onto the flash memory then any further use of the flash memory is stopped. In fail-safe-mode, when a defect is detected during the verify operation after writing data onto the flash memory, the error is corrected and flash memory usage continues. The operating state is normal mode, and when the verify operation detects a defect after normal mode erase operation, the operation shifts to fail-safe mode.