摘要:
A measurement unit for tensile or compressive stress can includes a CCD camera for detecting an interference light, the interference light being formed with a measurement beam from a measured region and a reference beam from a reference mirror. A first objective lens can have the reference mirror. An image processing apparatus can measure the three-dimensional shape of the measured region from the position of the first objective lens at which the interference light provides the maximum contrast and can measure the distance between two gauge points on the basis of the three-dimensional shape. When strain is generated on a micromaterial, the strain against the measured tensile stress is measured on the basis of the tensile stress and the distance between the two gauge points.
摘要:
A measurement unit for tensile or compressive stress can includes a CCD camera for detecting an interference light, the interference light being formed with a measurement beam from a measured region and a reference beam from a reference mirror. A first objective lens can have the reference mirror. An image processing apparatus can measure the three-dimensional shape of the measured region from the position of the first objective lens at which the interference light provides the maximum contrast and can measure the distance between two gauge points on the basis of the three-dimensional shape. When strain is generated on a micromaterial, the strain against the measured tensile stress is measured on the basis of the tensile stress and the distance between the two gauge points.
摘要:
An insulated gate transistor has a semiconductor thin film having a first main surface and a second main surface, a first gate insulating film formed on the first main surface of the semiconductor thin film, a first conductive gate formed on the first gate insulating film, first and second confronting semiconductor regions of a first conductivity type insulated from the first conductive gate and disposed in contact with the semiconductor thin film, and a third semiconductor region of a second conductivity type opposite to the first conductivity type disposed in contact with the semiconductor thin film. A gate threshold voltage of the first conductive gate is controlled by a forward bias of the third semiconductor region with respect to one of the first and second semiconductor regions.
摘要:
There is disclosed a near-field optical head having an microscopic aperture whose size can be varied. The optical head comprises a substrate of silicon. A hole in the form of an inverted cone is formed in the substrate. The top portion of this hole forms the microscopic aperture. A support portion for supporting an actuator is formed on the substrate. The actuator holds a light-blocking film in such a way that the light-blocking film stays in the hole and that the bottom surface of the light-blocking film is flush with the bottom surface of the microscopic aperture. The light-blocking film is moved by the actuator to change the aperture to desired size.
摘要:
An information recording and reproducing apparatus for at least one of recording and reproducing information on a recording medium utilizing near-field light has a suspension arm and a near-field light head mounted on the suspension arm. The near-field light head has a minute aperture, an optical waveguide for propagating light from a light source, and a reflection film for reflecting the light propagated by the optical waveguide and for irradiating the reflected light to the minute aperture to generate near-field light at the minute aperture for interaction with a recording medium. A light guiding structure guides light from the light source to the optical waveguide of the near-field light head.
摘要:
The object of the present invention is to provide an information recording/reproduction device for implementing high-density information recording and reading using mutual interaction of a recording medium with near field light, and particularly to a near field optical head with a high optical efficiency and a manufacturing method thereof. This is achieved by enabling an energy propagation mechanism via a plasmon by forming a layer dispersed with metal particulate at a microscopic opening generating near field light, and therefore increase optical efficiency.
摘要:
A method of fabricating a near-field light-generating element having a minute scattering body inside an aperture, the scattering body producing plasmons by being illuminated with light, includes a step of forming minute scattering bodies periodically arranged on a substrate, a step of selecting the periodically arranged minute scattering bodies except for only one minute scattering body, and a step of forming the aperture such that the single minute scattering body is placed inside the aperture.
摘要:
An optical information device has a suspension arm, a moving mechanism for movably supporting the suspension arm relative to a recording medium, an optical head supported by the suspension arm proximate the recording medium and having a slider and a flexible structure for linking the slider to the suspension arm so that the slider undergoes relative sliding movement with respect to the recording medium for at least one of recording information to the recording medium and reading information from the recording medium, and an optical waveguide for guiding light between the suspension arm and the slider. The optical waveguide is integrally formed with the flexible structure and preferably comprises patterned films formed on the optical head.
摘要:
A piezoelectric actuator has a vibrating member having a generally central portion and a vibratable cantilever extending from the central portion. The cantilever has a first major surface, a second major surface opposite the first major surface, a first end integrally connected to the central portion, and a second free end. A piezoelectric element is connected to the second major surface of the cantilever and is driven by a voltage signal applied thereto to undergo expansion and contraction to vibrationally drive the cantilever. A moving member is in contact with the first major surface of the cantilever to be frictionally driven by vibration of the cantilevers in response to expansion and contraction of the piezoelectric element.
摘要:
A near-field optical head has a minute structure formed in the support member for interacting with a recording medium via near-field light. An optical waveguide is provided on the support member for guiding light between a light source and the minute structure. The optical waveguide has a core, a clad and a reflective surface, the core having an end face facing the reflective surface and being spaced therefrom so that light traveling through the optical waveguide is projected from the end face of the core onto the reflective surface and is reflected by the reflective surface toward the minute structure. Information is recorded to and/or read from the recording medium based on the scattering of near-field light between the recording medium and the minute structure while the near-field optical head is positioned over the surface of the recording medium.