| Hitachi Media Electronics Co., Ltd. Patent applications |
| Patent application number | Title | Published |
|---|
| 20110299378 | Optical Pickup Having Radially Arranged Lenses in a Low Profile Construction - An optical pickup includes a first source which emits a first beam with a first wavelength; a second source which emits a second beam with a wavelength shorter than the first wavelength; a first collimate lens which collimates the first beam; a second collimate lens which collimates the second beam; a first objective lens which converges the first collimated beam onto an optical disc; and a second objective lens which converges the second collimated beam onto the disc. The first and second objective lenses are arranged in the disc radial direction. The second objective lens is arranged closer to the side of the disc outer circumference than the first objective lens. The first collimate lens is arranged on the right-hand side when the second objective lens is viewed from the first objective lens. The second collimate lens is arranged on the left-hand side when the first objective lens is viewed from the second objective lens. The gap between the first collimate lens and the first objective lens is larger than the gap between the second collimate lens and the second objective lens. | 12-08-2011 |
| 20110037343 | Elastic Wave Device - In a boundary elastic wave resonator formed with a cross finger type transducer (IDT) of a wave length λ of a boundary elastic wave, a silicon oxide film, and an aluminum nitride film above a surface of a θYX-LN single-crystal piezoelectric substrate having a predetermined cut angle θ, a film thickness h | 02-17-2011 |
| 20110021891 | NON-INVASIVE GLUCOSE MONITOR - In a non-invasive glucose monitor is configured to, by using a heat conductive member having a body surface contacting part for contacting a surface of a human body at its one end, measures a first temperature adjacent to the body surface contacting part and a second temperature adjacent to the other end apart from the body surface. The computing device takes in data of the first and second temperature, environmental temperature, radiation heat from the body surface, reflection light caused by reflecting the light of the two different wavelength at the body surface contacting part. The computing device stores a relationship between parameters and blood glucose levels in advance, thereby converts the above-mentioned data to parameters, and calculates a blood glucose level by applying the parameters to the relationship. | 01-27-2011 |
| 20100243873 | OPTICAL PICKUP DEVICE - An optical pickup device includes a house having three walls connected together whose horizontal cross-section is substantially U-shaped. A first wall supports one end of a shaft, a second wall facing the first wall supports the other end of the shaft and a third wall connects the first and second walls. A lubricant tray is surrounded by the three walls and the shaft. By the shaft being attached to an end side surface of the lubricant tray, the shaft can be integrally formed with the housing. A radius of curvature or an angle formed on a horizontal cross-section of the three walls is larger than a radius of curvature or an angle formed between one of the three walls and the lubricant tray. | 09-30-2010 |
| 20100214904 | Optical Pickup Having Radially Arranged Lenses in a Low Profile Construction - An optical pickup includes a first source which emits a first beam with a first wavelength; a second source which emits a second beam with a wavelength shorter than the first wavelength; a first collimate lens which collimates the first beam; a second collimate lens which collimates the second beam; a first objective lens which converges the first collimated beam onto an optical disc; and a second objective lens which converges the second collimated beam onto the disc. The first and second objective lenses are arranged in the disc radial direction. The second objective lens is arranged closer to the side of the disc outer circumference than the first objective lens. The first collimate lens is arranged on the right-hand side when the second objective lens is viewed from the first objective lens. The second collimate lens is arranged on the left-hand side when the first objective lens is viewed from the second objective lens. The gap between the first collimate lens and the first objective lens is larger than the gap between the second collimate lens and the second objective lens. | 08-26-2010 |
| 20100162281 | OPTICAL PICKUP DEVICE AND METHOD FOR MANUFACTURING THE SAME - To provide an optical pickup device adapted such that for adhesion fixing of a holder for holding an LD or a light-receiving element to an optical pickup casing via an ultraviolet-curable adhesive, curing shrinkage during ultraviolet irradiation can be reduced and adhesion fixing achieved with high positioning accuracy. In a structure for adhesion fixing of a holder for holding an LD or a light-receiving element to an optical pickup casing via an ultraviolet-curable adhesive, since protrusions are provided at peripheral sections (UV irradiation light source side) on a bonding surface of the holder, a section exposed to strong UV light is first cured, then after the adhesive has moved from an uncured section, the amount of shrinkage of the first cured section in a Z-direction is reduced, and the uncured section is cured. | 06-24-2010 |
| 20100124161 | OPTICAL PICKUP AND OPTICAL INFORMATION REPRODUCING DEVICE - An optical pickup and an optical information recording and reproducing device in which spherical aberration correction control after a disc is loaded can be efficiently made in a short time. Before an information recording medium is loaded into a drive, an optical axis direction position of a concave lens is preset to a state so as to optimize a converging spot on a recording surface of a single-layered medium of as a first recording medium or a predetermined layer (first layer having a substrate thickness of 0.1 mm) of a medium having two or more layers to which the recording/reproduction is executed by a laser light source. After the information recording medium is loaded, if it is determined to be a second (third) recording medium to which the recording/reproduction is executed by a laser light source, setting of the optical axis direction position of the concave lens is changed. | 05-20-2010 |
| 20100124153 | OPTICAL PICKUP AND OPTICAL INFORMATION REPRODUCING DEVICE - An optical pickup and an optical information recording and reproducing device in which spherical aberration correction control after a disc is loaded can be efficiently made in a short time. Before an information recording medium is loaded into a drive, an optical axis direction position of a concave lens is preset to a state so as to optimize a converging spot on a recording surface of a single-layered medium of as a first recording medium or a predetermined layer (first layer having a substrate thickness of 0.1 mm) of a medium having two or more layers to which the recording/reproduction is executed by a laser light source. After the information recording medium is loaded, if it is determined to be a second (third) recording medium to which the recording/reproduction is executed by a laser light source, setting of the optical axis direction position of the concave lens is changed. | 05-20-2010 |
| 20090310468 | OPTICAL PICKUP APPARATUS - Influences of reflected light, which result in crosstalk from adjacent layers in a multi-layered optical disk, are mitigated. In an astigmatic optical system of an optical pickup, a first composite segmented wave plate having a segmentation direction that is in the same direction as the focal line that is close to the astigmatic optical system, a second composite segmented wave plate of the same segmentation direction, and an analyzer are inserted. | 12-17-2009 |
| 20080258984 | Antenna, and wireless module, wireless unit and wireless apparatus having the antenna - In an antenna that has high sensitivity to frequencies of narrow bands and over a wide band and that can be small-sized, and in a wireless module, wireless unit and wireless apparatus using this antenna, the antenna is comprised of a transmission line, and variable capacitance means connected to this transmission line, and the variable capacitance means controls the resonant frequency. | 10-23-2008 |
| 20080219119 | Optical pickup and optical disc unit - Provided is an optical pickup which can eliminate a problem of causing a focus error signal and a tracking error signal to fluctuate due to interference of a signal light beam with a return light beam from another recording surface of a multi-layer optical disc during reproduction, | 09-11-2008 |
| 20080198730 | Optical head and apparatus for optically recording and reproducing information - An optical sensor has first light receiving surfaces having respective pentagonal or hexagonal shapes and being independent of each other, and second light receiving surfaces having respective hexagonal shapes and being independent of each other, third light receiving surfaces having respective hexagonal shapes and being independent of each other, fourth light receiving surfaces having respective hexagonal shapes and being independent of each other, and fifth light receiving surfaces having respective hexagonal shapes and being independent of each other. A relationship between a size of each of the light receiving surfaces and a diameter of respective one of light beams received by corresponding one of the light receiving surfaces is set within a predetermined range. A light beam multiple-dividing element diffracts the light beams received by a first grating area to form +primary lights, and diffracts the light beams received by second and third grating areas to form +primary lights and −primary lights. Relationships of U/D and V/D are set within predetermined ranges. | 08-21-2008 |
