Abstract: An imaging device includes a photoreceptor portion including a plurality of photoreceptors arranged in an array, a microlens array including a plurality of microlenses, and a light shielding layer placed between the photoreceptor portion and the microlens array. The light shielding layer has apertures located corresponding to the plurality of photoreceptors. An optical relationship of an actual length d1 of an aperture width of the apertures on a side of the photoreceptors, an actual length p of a distance between adjacent microlenses, an equivalent air length t0 of a distance between vein and a top of the microlenses, and an equivalent air length t1 of a thickness between the top of the microlenses and an aperture position of the apertures on the side of the photoreceptors satisfies: 1.36 × t ? ? 1 p ? d ? ? 1 ? 2.4 × t ? ? 1 p + p × t ? ? 1 t ? ? 0 .

Abstract: A biometric information acquisition apparatus includes a sensor that includes at least one pixel row formed from a plurality of pixels, and a drive mechanism that moves the sensor in a direction intersecting a pixel arrangement direction of the pixel row.

Abstract: A biometric information acquisition device for acquiring biometric information of a biological portion includes a light emitter to emit an inspection light, a light guide to guide the inspection light from a light incident surface thereof to a light exit surface thereof and to output the guided inspection light to the biological portion through the light exit surface, and an imager to acquire an image by receiving the inspection light from the biological portion, wherein the light output through the light exit surface of the light guide has a substantially equal intensity in a longitudinal direction of the light exit surface.

Abstract: An imaging device includes a photoreceptor portion including a plurality of photoreceptors arranged in an array, a microlens array including a plurality of microlenses, and a light shielding layer placed between the photoreceptor portion and the microlens array. The light shielding layer has apertures located corresponding to the plurality of photoreceptors. An optical relationship of an actual length d1 of an aperture width of the apertures on a side of the photoreceptors, an actual length p of a distance between adjacent microlenses, an equivalent air length t0 of a distance between vein and a top of the microlenses, and an equivalent air length t1 of a thickness between the top of the microlenses and an aperture position of the apertures on the side of the photoreceptors satisfies: 1.36 × t ? ? 1 p ? d ? ? 1 ? 2.4 × t ? ? 1 p + p × t ? ? 1 t ? ? 0 .

Abstract: The backlight unit includes a light guide that receives light emitted from a LED through its end and reflects the light by a prism-shaped reflective groove to thereby output parallel light through an output surface, and a microlens array substrate that receives the parallel light output from the light guide through its side surface and reflects the light by a prism portion to thereby output the light to a liquid crystal display panel through a microlens array. The prism portion has a reflective groove that lies perpendicular to the propagation direction of the parallel light entering through the side surface. The microlens lies perpendicular to the reflective groove. A low refractive index layer is placed to the side of the microlens array.

Abstract: An optical component of the present invention is a microlens array formed on a transparent substrate made of glass and having multiple microlenses made mainly of glass. The adjacent microlenses are coupled by the same glass material as the microlenses. The expansion coefficient of the lenses is substantially equal to the expansion coefficient of the transparent substrate. The thickness ? at the boundary between the adjacent microlenses is 0.1 ?m???200 ?m.

Abstract: The present invention provides a device relating to separation (extraction, purification) of a biological component such as nucleic acid, protein and the like from a liquid sample containing the biological component, and, as a method, a device for separating a biological component, which contains magnetically responsive particles and a chip obtained by adhering a pair of substrates, which contains one or multiple grooves formed on at least one surface thereof, with the groove(s) placed inside, and a method of separating a biological component from a liquid sample, which uses this device, and includes the following steps (a)-(d): (a) a step of holding the device such that the adhesion surface of the pair of substrates is about perpendicular to the horizontal direction, (b) a step of adsorbing the biological component to magnetically responsive particles by contacting the magnetically responsive particles with the liquid sample containing the biological component, (c) a step of separating the magnetically respo

Abstract: A method of fabricating a microlens array first forms a photosensitive resin layer on the surface of a transparent substrate opposite from the surface having aperture portions. It then places an exposure substrate and the transparent substrate so that parallel light having an intensity distribution corresponding to a shape of an exposure microlens array is focused by the exposure microlens array and enters the transparent substrate through the aperture portions. After that, the method exposes the photosensitive resin layer by applying the parallel light to the photosensitive resin layer through the exposure substrate. Then, it develops the exposed photosensitive resin layer.

Abstract: A member having a metal layer is disclosed. The member is a silicon substrate or quartz substrate, for example, which is mainly composed of silicon or silicon oxide. A plurality of overhanging depressions are created on the surface of the member, and an anchor layer is formed thereon by filling the depressions. On the anchor layer is formed a metal film. The depressions are created by physical grinding followed by chemical etching. The anchor layer is NiP or NiB, for example. The metal layer is Au or AuSn, for instance.

Abstract: A magnetic recording medium wherein thickness of the magnetic layer is less than the wavelength of projected light onto the surface of the magnetic recording medium having a multiplicity of magnetic-head tracking recesses formed thereon at predetermined intervals, and data tracks for recording thereon predetermined information provided between every two adjacent magnetic-head tracking recesses, each tracking recess and data track having a function to track a magnetic head in accordance with reflected light from the magnetic-head tracking recesses, the data tracks being provided at a track density greater than 1000 TPI and light transmittance of the magnetic recording medium is less than 5%.

Abstract: In a magnetic recording medium in which light is applied to a magnetic head-tracking optical recess and a data track between these recesses so as to effect a tracking of a magnetic head in accordance with light reflected by them,variation in light reflectance is limited to not more than 4 dB in a frequency range of 100 Hz to 2 KHz anda thickness of the magnetic layer at the data track, or a depth of the recess is set to a specified range so that a tracking servo can be effected properly, thereby enhancing reliability of the magnetic recording medium.

Abstract: A magnetic disk has optical servo grooves formed at specified intervals along data tracks so that variations in reflected light of light applied to the grooves are detected so as to allow a magnetic head to perform tracking servo. A level difference between a regenerative signal and a fundamental wave of modulation noise during reads of data recorded on the data tracks (4A, 4B) is set to 28 dB or more. Thus, comb-shaped modulation in a regenerative signal due to optical servo grooves is reduced so that output drop of the regenerative signal is suppressed and deterioration of window margin and the like is lessened.

Abstract: There is provided a stamper for producing a recording medium exhibiting excellent durability and capable of stably forming projections and pits and a method of producing the stamper. A stamper for producing a recording medium comprising projections and pits in a predetermined pattern on the surface thereof, wherein a value of tan .theta..sup.-1 obtainable from an enlargement angle .theta. of an output from a cartridge with respect to an enlargement of an output denoting a load measured by a test of scratching the surface having the projections and pits under conditions that a diameter of a stylus is 100 .mu.m and a loading speed of 1 .mu.m/second is 1.3 or more.

Abstract: A magnetic disc cartridge comprising a cartridge case, a magnetic disc housed rotatably in the cartridge case, and a liner, which serves as a cleaning sheet, secured on the inner surface of the cartridge case, characterized in that the magnetic disc has a magnetic layer containing a ferromagnetic metal powder, a reinforcing powder, whose content is defined in the range of from 5 to 40% by weight, and a fatty acid ester with a melting point of 0.degree. C. or lower, and that at least the disc side surface layer of the cleaning sheet, which is brought into sliding contact directly with the magnetic layer, is almost entirely composed of rayon fiber, such that the magnetic disc cartridge of the present invention can provide a highly reliable magnetic disc cartridge having a magnetic disc which is excellent in durability and substantially error free.

Abstract: There is provided a magnetic recording medium which is highly reliable so that tracking servo can be properly effected wherein Z.ltoreq.0.49 is established when light reflectance on a data track is represented by X, light reflectance of a magnetic head-tracking recess is represented by Y, and Z=Y/X.

Abstract: A magnetic recording medium in which the center of a magnetic head can be brought to a centerline of a reference track, thereby enhancing the reliability of the magnetic recording medium, the reference track being provided at a predetermined position of a magnetic layer of the medium, a number of magnetic head-tracking optical tracks are provided respectively at positions spaced predetermined distances from the reference track in a direction perpendicular to the direction of travel of the magnetic head, and a data track is formed between any two adjacent ones of the magnetic head-tracking optical tracks, the reference track having a pair of reference recess regions arranged symmetrically with respect to an arbitrary point on the centerline of the reference track, and a flat portion with no recess formed adjacent to each of the reference recess regions, the recess in each reference recess region being formed by cutting by a laser.

Abstract: A magnetic recording/reproducing apparatus and method, the apparatus including a drive mechanism for driving a flexible magnetic disk loaded thereon to rotate, the magnetic disk being comprised of a transparent and flexible base film formed with first and second magnetic layers on both sides thereof, each of the magnetic layers having a film thickness of no greater than 1 .mu.

Abstract: A magnetic head supporting device for supporting at least one magnetic head in contact with a flexible magnetic disk so as to record and reproduce signals in and from the flexible magnetic disk. The magnetic head supporting device comprises a gimbal spring having a central portion to which the magnetic head is secured at one side thereof; and a pivot which contacts on the opposite side of the central portion of the gimbal spring so as to support the center of the magnetic head through the intermediary of the gimbal spring.

Abstract: A magnetic head device with head cores connected to end surfaces of sliders, opposing each other on both sides of a magnetic disc, wherein one head core and slider combination is mounted on a gimbal spring, and a pivot member for pressing the magnetic disc, the pivot having plural pressing members aligned in the radial direction of the magnetic disc, the pivot being formed so that the pressing force can be applied generally uniformly to every part of the upper core and lower core.

Abstract: In a recording disc cartridge having a recording disc rotatably supported by a hub assembly in a disc case, the hub assembly is formed by a hub body and a reinforcing metal plate laid on one of the surfaces of the hub body so as to prevent thermal deformation of the recording disc due to deformation of the hub body.