摘要:
In an information recording and/or reproduction apparatus, a recorded bit row on a record medium is relatively scanned with a probe and the recorded bit is detected. The information recording and/or reproduction apparatus includes a scanning unit for effecting a plurality of relative scans of the recorded bit row with the probe, a detecting unit for detecting a tilt of the recorded bit row relative to a direction of the relative scan on the basis of a reproduction signal obtained by the scans performed by the scanning unit, and a correction unit for correcting the direction of the relative scan on the basis of a detected result by the detecting unit.
摘要:
A probe for use in an information recording apparatus for recording information on a recording medium by applying a voltage between the recording medium and a tip of the probe includes a conductive tip, wiring provided on the probe for applying a voltage to the tip from a voltage application device, and an electrical resistance provided in the tip or in the wiring on the probe. The resistance may be composed of an oxide film on the surface of the tip. Instead of providing the electrical resistance, the tip or the wiring may be covered with an electromagnetic shield. As another alteractive, an electrical resistance layer may be provided between a substrate of the recording layer and the tip of the probe.
摘要:
An information recording and/or reproducing apparatus records and reproduces information with probes. The apparatus includes probes made of an elastic body, a recording medium which oxidizes in portions where an electric current flows in the atmosphere to form recording bits, a device for moving the probes relative to the recording medium, and a device for applying a recording voltage between the probes and the recording medium for forming the recording bits.
摘要:
A device usable with a first object and a second object at least one of which is provided with a diffraction grating, for detecting the position of the second object relative to the first object, is disclosed. The device includes a light source for projecting a position detecting beam upon the first object; a beam detecting portion for receiving the position detecting beam after it is directed from the first object and being incident on the second object, the beam detecting portion receiving the position detecting beam to detect the position of the second object relative to the first object; wherein at least one diffraction grating is disposed in the path of the position detecting beam to be received by the beam detecting portion, which diffraction grating is effective to diffract the position detecting beam at least twice and wherein the beam detecting portion is disposed at a site effective not to receive unwanted diffraction light produced from the or at least one diffraction grating.
摘要:
A device for measuring a relatively moving distance of two relatively moving objects is disclosed. The device includes a plurality of inclined surfaces formed on one of the objects and arrayed with a predetermined pitch along the relatively moving direction, with each of the inclined surfaces being inclined with respect to the relatively moving direction. A measuring portion is provided on the other object for measuring the distance to at least one of the inclined surfaces in a direction having an angle with respect to the relatively moving direction, and a detecting portion detects the relatively moving distance of the two objects on the basis of the measurement by the measuring portion.
摘要:
In the fields of biosensing and the like, achievement of high sensitivity and high performance has been demanded in the concentration detection of target substances. In order to meet such demand, disclosed is an optical element utilizing the localized surface plasmon resonance, including: a dielectric substrate; a first group of metal microstructures in which a plurality of metal microstructures is supported on a dielectric substrate in an in-plane direction of the substrate; and a second group of metal microstructures in which a plurality of metal microstructures is disposed in the in-plane direction, and each of the metal microstructures is partially exposed to the outside; wherein the first group of metal microstructures and the second group of metal microstructures are laminated so as to be separated from each other by 100 nm or more.
摘要:
A sensor device is formed from a metal film having a plurality of openings, a sensor material positioned within each of the openings, a light source that emits light having a first wavelength, and a light detector that detects light emitted from the light source and transmitted through or reflected from the openings. The plurality of openings are arranged periodically in a first direction in the metal film, and both a size of each of the plurality of openings and an interval thereof in the first direction are equal to or less than the wavelength of the light.
摘要:
A near-field exposure method including preparing a photomask for near-field exposure, having a light blocking film provided on a base material constituting a membrane portion and a support member supporting the base material, wherein a first alignment mark for rough alignment is provided on the support member and a second alignment mark for fine alignment is provided on the membrane portion, setting the photomask and an object to be exposed in a near-field exposure apparatus, aligning the photomask and the object using the first alignment mark, flexing the membrane portion to contact with the object and detecting a positional relation between the membrane portion and the object using the second alignment mark, aligning the photomask and the object based on the detected positional relation and flexing the membrane portion to contact with the object, and exposing the object to light from a light source by way of the photomask.
摘要:
A plasmon sensor apparatus using a metallic fine periodic structure designed to reduce the dependences of the resonance wavelength and sensitivity on the incident angle. The plasmon sensor apparatus has a sensing element including a metallic member having periodic slit openings and metallic portions, and a substrate on which the metallic member is held, a light source which emits light so that the light is incident on the sensing element, and a photodetector which detects light obtained from the light source. If the period of the slit openings is Λ; the width of the metallic portions is d; and the thickness of the metallic member is h, the aspect ratio h/(Λ−d) of the slit openings is 3 or higher and the opening width (Λ−d) is equal to or smaller than the wavelength of light applied from the light source to the sensing element.
摘要:
Disclosed is a method and apparatus for detecting a relative positional deviation between first and second objects. In one preferred form of the invention, the detecting method includes the steps of (i) providing the first and second objects with diffraction gratings, respectively, each having a grating pitch larger than a wavelength of a light source used, (ii) placing the first and second objects so that a dielectric material layer having a thickness smaller than the wavelength of the light source used is interposed between the first and second objects, and so that the diffraction gratings of the first and second objects are opposed to each other, (iii) projecting light from the light source onto the diffraction gratings of the first and second objects, and (iv) detecting the relative positional deviation between the first and second objects on the basis of diffraction light projected from the diffraction gratings to a space.