Sony Corporation

Tadashi Taniguchi

Chiaki Kojima

Hiroshi Yoshida

Takashi Kobayashi

Yoshitsugu Fujimaki

Kenji Yamamoto

Masahiro Yamada

Tetsu Watanabe

Masafumi Ozawa

Takakiyo Kanazawa

Takashi Mizuno

A compact and light flying head type magneto-optical head apparatus is provided. The magneto-optical head apparatus () of the present invention comprises a suspension () whose one end is fixed to a lower surface of an arm (), a slider () fixed to a free end of the suspension (), and a magnetic modulation coil () and an object lens () mounted on the slider (). The slider () mounted with the magnetic modulation coil () and the object lens () floats due to a wind pressure caused by rotation of an MO disk (). The magneto-optical head apparatus () is further provided with a collimeter lens () between a light source () and the object lens () in a hybrid optical apparatus () provided to the arm (), and a position of the collimeter lens () can be adjusted vertically along an optical axis O-O by a collimeter actuator (), so that optical conditions between the light source () and the object lens () are improved.

Optical head device, and optical recording/reproducing device

A diffraction element is interposed between a semiconductor laser and collimator lens. Other diffracted light than zero-order light output from the diffraction element will not be focused on an optical recording medium and the amount of light condensed to the focus of the zero-order light is thus smaller. The diffraction element is variable in diffraction efficiency. When the diffraction efficiency of the diffraction element is raised, an optical pickup device will utilize the light with a lower efficiency. With the diffraction efficiency being lowered, the optical pickup device will utilize the light with a higher efficiency. Thus, the optical pickup device can utilize the light with a variable efficiency without having to being designed larger.

Optical pickup and optical disk drive

The present invention relates to an optical pickup and a disc drive for preventing aberrations of laser light due to variations in temperature and humidity to ensure satisfactory characteristics of the laser light. A compound lens () is disposed in the optical path of the laser light, which is emitted by a light-emitting device () to be incident on a beam splitter (), and in the optical path of the laser light, which exits from the beam splitter to be incident on a photodetector (). The compound lens includes a diffractive section () for diffracting the laser light and a lens section () having a predetermined function for the laser light. The compound lens is formed by integrating individual sections including the diffractive section and the lens section. The compound lens is provided with a passage hole () that lets in the laser light emitted by the light-emitting device to be incident on the beam splitter.

Optical disc with an improved compound lens

In an assembling method of a light emitting device having a light emitting element for emitting light and a package for sealing in at least the light emitting element, the package is sealed in an ozone atmosphere and the light having a wavelength is irradiated into the sealed package. Activated ozone produced in the package collides with an Si organic compound and the Si organic compound is decomposed and becomes a stable substance.

Method of assembling light-emitting apparatus

A CAN package light emitting device comprises a semiconductor laserbonded on a sub mountand a CAN packagefor housing the semiconductor laserbonded on the sub mount. The CAN packagecomprises a fixing structurefor fixing the semiconductor laser at a predetermined position, and a capcovering the semiconductor laserfixed to the fixing structure. Vapor pressure of Si organic compound gas in the CAN packageis limited to or below 5.4&#xd7;10N/mto prevent any deposit as thick as inviting characteristics deterioration from being formed on the light emitting portion of the semiconductor laserwithin the guaranteed time of its proper operation.

Light emitting device

An optical pickup device with the capability to read data from and write data to different kinds of optical discs in different formats and a composite optical device used in the optical pickup device. An optical pickup device is made by combining two laser couplers LCand LCthat are designed for optimum read/write specifications for optical discs which are different in format from each other. In one embodiment, two laser couplers LCand LCare incorporated on a common photodiode IC to form a single laser coupler, and the laser coupler is used in an optical pickup device.

Optical pickup device with a plurality of laser couplers

The present invention concerns a hybrid optical element including at least one optical element () attached to one surface of a substrate (), a semiconductor laser () and a photodetector () attached to the other surface of the substrate () and an intermediate member (relay substrate) () interposed between the substrate () and the photodetector (). The intermediate member () has a through hole () through which a light flux incident on the photodetector () is allowed to pass and a part with a conductivity by which a terminals of the photodetector () are connected to a conductor pattern on the substrate ().

Hybrid optical element and photodetector device

An optical pickup device with the capability to read data from and write data to different kinds of optical discs in different formats and a composite optical device used in the optical pickup device. An optical pickup device is made by combining two laser couplers LC and LC that are designed for optimum read/write specifications for optical discs which are different in format from each other. In one embodiment, two laser couplers LC and LC are incorporated on a common photodiode IC to form a single laser coupler, and the laser coupler is used in an optical pickup device.

A composite optical device comprises an optical element bonded onto a support body with an adhesive, at least a part of surfaces of the optical element being covered by a film made of a hydrophilic material. A method for manufacturing a composite optical device having an optical element bonded onto a support body with an adhesive, comprises the steps of: preparing a bar-shaped optical element having a length not less than twice the width thereof and having surfaces at least a part of which is covered by a film made of a hydrophilic material, and bonding the bar-shaped optical element on the support body with the adhesive; and cutting the bar-shaped optical element, the adhesive and the support body while applying a liquid containing water at least to portions where they are cut.

Composite optical device and its manufacturing method

An optical pickup device with the capability to read data from and write data to different kinds of optical discs in different formats and a composite optical device used in the optical pickup device. An optical pickup device is made by combining two laser couplers LC1 and LC2 that are designed for optimum read/write specifications for optical discs which are different in format from each other. In one embodiment, two laser couplers LC1 and LC2 are incorporated on a common photodiode IC to form a single laser coupler, and the laser coupler is used in an optical pickup device.

Method for manufacturing a composite optical device

To reduce the size, the weight, and the production cost and to improve the reliability of an optical device for a code reader for reading a code (24) imprinted on the package of an article, a light emitting element (21), a prism (22) and a light receiving element (15) are all fixed to a semiconductor substrate (14), so that the assembly at the semiconductor chip level of these elements (15, 21 and 22) is possible. This device can be used for an optical apparatus for reading various codes used in POS systems, physical distribution/management systems, production control systems, and so forth.

Semiconductor optical device for code reader

A laser coupler comprises photodiodes formed on a photodiode IC, a microprism mounted on the photodiode IC to lie on the photodiodes, and a semiconductor laser mounted nearby on the photodiode IC such that a beam of light entering into the microprism through its incident surface is bifurcated and introduced onto the photodiodes. A difference between the amount of incident light to one of the photodiodes and the amount of incident light to the other of the photodiodes is corrected by adjusting a difference between the gain of a current-voltage converter amplifier coupled to one of the photodiodes and the gain of a current-voltage converter amplifier coupled to the other photodiode. Thus, the laser coupler can be fabricated economically.

Growing community of inventors

Kanagawa, Japan

Tadashi Taniguchi