Samsung Electronics Co., Ltd.

Cheol-sung Yeon

Young-min Cheong

Kun-ho Cho

Pyong-yong Seong

Dae-Sik Kim

Seung-tae Jung

Dong-seob Jang

Gyu-chan Jun

Chong-sam Chung

Chul-woo Lee

Jang-hoon Yoo

Sang-Hun Lee

Woon-bae Kim

Chul-Woo Lee

Soon-kyo Hong

Dong-Ho Shin

Byoung-young Bae

Ho-cheol Lee

Joong-Eon Seo

Jong-woo Shin

Seung-Tae Jung

Hong-kyu Lee

Young-pyo Lee

Byoung-chan Lee

Hee-dong Kim

Hyung-gae Shin

Yong-Moon Lee

Kun-Mo Cho

An optical pickup used to record information on and/or reproduce information from an optical recording medium, the optical pickup including an optical module to emit a light beam; and a front photo-detector to monitor power of the light beam; wherein the optical module is coupled to the front photo-detector so that a fixed distance is maintained between the optical module and the front photo-detector.

Optical pickup

A PCMCIA card type recording apparatus includes a housing having a seating section on which a disk cartridge is seated, a disk driving section disposed in the housing to rotatably drive a recording medium in the disk cartridge seated on the seating section, a recording/reproducing unit disposed in the housing to record and reproduce data with respect to the recording medium, and a protection cover disposed at the housing to cover and protect the disk cartridge.

Recording apparatus enabling replacement of disk cartridge

A reflection type compound prism and an optical pickup apparatus employing the same. As a light beam is passed through the compound prism, a size of the light beam in a direction perpendicular to a reference plane is reduced by a first reflection surface, propagated toward an objective lens by second and third reflection surfaces and the size restored by reflecting the light beam from a fourth reflection surface forming an angle less than 45&#xb0; with respect to the reference plane so that a height of an optical system is reducible to obtain a small thin optical pickup with a desired NA. The second and third reflection surfaces are spaced apart in a direction perpendicular to the reference plane by an amount close to a diameter of the light beam at a point of incidence of the light beam with the compound prism.

Reflection type compound prism and optical pickup apparatus employing the same

An optical reading and writing system including a base; an optical disk rotatably mounted on the base; an optical pickup including an objective lens, focusing a light beam to form a light spot on a recording surface of the optical disk; an actuator arm mounted on the base such that the actuator arm can pivot in the radial direction of the optical disk by a voice coil motor; a load beam supported by the actuator arm, and capable of moving slightly up and down and in the radial direction of the optical disk by an external force; a flexure attached to the load beam, supporting a slider to enable the slider to contact the recording surface; and a driving unit mounted on free ends of the actuator arm and the load beam, providing a driving force in the radial direction to the free end of the load beam.

Optical reading and writing system

A slim optical pickup apparatus which records/reads information from a recording medium includes a light source, an objective lens which focuses a beam incident from the light source on the recording medium, an optical device which is provided on an optical path between the light source and the objective lens, and converts the beam incident from the light source into a parallel beam, an optical axis shifting unit which is provided on an optical path between the optical device and the objective lens, and shifts an optical axis of the parallel beam passing through the optical device in parallel in a direction, a reflecting mirror which is provided on an optical path between the optical axis shifting unit and the objective lens, and reflects the parallel beam passing through the optical axis shifting unit toward the recording medium, and a photodetector which receives a beam reflected from the recording medium and passed through the optical axis shifting unit, and performs a photoelectric conversion. Use of the optical path shifting unit reduces the height of an optical pickup apparatus, thereby providing a slim optical pickup apparatus using an existing light source and photodetector of a conventional size.

Slim optical pickup apparatus

An air-bearing slider for an optical disk drive for recording/reproducing information onto/from an optical disk while floating and moving at a predetermined height from the rotatably installed optical disk due to a dynamic air pressure is disclosed. The air-bearing slider includes a slider main body having an objective lens installation hole formed through the slider main body so that an objective lens can be installed, and an opening formed through the slider main body at one side portion of the objective lens installation hole, so that air flow flowing under the slider main body can flow out through the opening via the objective lens installation hole when the slider is floating as a result of dynamic air pressure.

Air-bearing slider for optical disk drive

A front projection type screen includes a transparent base; a diffusion member formed on one surface of the transparent base; and a retroreflection prism array formed on another surface of the transparent base. Thus, a wide angle of visibility can be secured in a horizontal direction while an angle of visibility in a vertical direction is limited to a narrow scope. Also, a wide viewing angle can be achieved and high efficiency and brightness of light may be obtained.

Front projection type screen

A magneto-optical head for magneto-optical writing and reading systems having an improved construction for a field modulating coil and a miniature objective lens, and a method of manufacturing the magneto-optical head. The magneto-optical head is mounted at the end of a slide-arm movable over a magneto-optical recording medium by hydrodynamics and includes: a lens mounted at the end of the slide-arm, for focusing incident light to form a light spot on the magneto-optical recording medium; a coil member including at least two stacked coil layers, and an insulating layer interposed between adjacent coil layers for electrically insulating the adjacent coil layers from one another, the stacked coil layers being planar coils with a spiral structure and having electrical contacts for electrical connection therebetween; and a connection member interposed between the lens and the coil member, for connecting the coil member to one side of the lens, facing the magneto-optical recording medium, and for electrically connecting the coil layers to an external power supply. The coil member is manufactured using a semiconductor fabrication process.

Magneto-optical head for magneto-optical reading and writing system

A shutter opening apparatus and method for opening a shutter of a cartridge outside an optical disc recording and reproducing apparatus. The shutter opening apparatus includes an opening section mounted on a longitudinal opening of a tray for opening the shutter, a feeding section moved by the opening section for feeding the tray into an inner portion of the optical disc recording and reproducing apparatus, and a driving section for driving the opening section and the feeding section. The opening section includes a worm shaft rotatably mounted across the longitudinal opening, a first bevel gear rotated by the driving section and which is engaged with the worm shaft, and a bracket moved by the worm shaft for opening the shutter. The feeding section is movably installed on the tray and includes a slide bar moved between a first and second positions by the bracket, and a bias spring disposed between the try and the slide bar to bias the slide bar toward the first position. At one end of the slide bar, a rack to be engaged with the driving section is formed. The driving section includes a motor for generating a driving power, a second bevel gear rotated by the motor and engaged with the first bevel gear when the slide bar is at the second position, and a loading gear engaged with the rack when the slide bar is at the second position. The shutter of the cartridge is opened without failure outside the optical disc recording and reproducing apparatus, so the optical disc recording and reproducing device has a smaller size, and the loading errors of the disc are prevented.

Apparatus and method with a driving mechanism for opening a shutter of a cartridge

An optical focusing system which uses a light beam emitted from a light source, includes a refractive surface on one side of the optical focusing system and having a first radius of curvature, a first reflection surface on the above one side, surrounding the refractive surface and having a second radius of curvature being different from the first radius of curvature, a transparent beam focusing surface on the other side of the optical focusing system, and a second reflection surface on the above other side and surrounding the beam focusing surface. The refractive surface refracts an incident light beam, the second reflection surface reflects a light beam refracted by the refractive surface toward the first reflection surface, and the first reflection surface focuses a laser light beam reflected from the second reflection surface on the beam focusing surface as a focused beam spot. The optical focusing system can be used in an optical pickup. The optical pickup uses the optical focusing system to generate, from a light beam e.g. laser light emitted from a light source, a beam spot used for recording or reading information to a recording medium. The optical pickup uses a near field effect provided by an optical focusing system according to the present invention, to allow a superior density of recording or reading. Further, the optical focusing system according to the invention can use a light beam having a beam diameter smaller than that of the laser beam used for an existing optical focusing system for forming a near field. Thus, the optical pickup according to the invention can record or read information on an optical disk having a surface recording density of 10 Gbit/inch,or more. Even if an incident light beam inclination occurs due to movement of the disk or the optical pickup, information can be recorded on or read from a disk accurately. Also, the assembly of the optical focusing system and the adjustment of the assembled optical focusing system are easily performed.

Catadioptric optical system, optical pickup and optical disk drive employing the same, and optical disk

A disc drive includes a motor and a turn table mounted on a shaft of the motor to be driven thereby. The turn table includes a lower drive member driven by the motor, and a positioning member mounted on the drive member. The positioning member includes a top surface on which the disc is mounted. The positioning member and drive member form a concave/convex interface, enabling the positioning member to float relative to the drive member to a position wherein the top surface (and disc) is oriented horizontally, even if the drive member becomes tilted relative to the shaft. The interface includes interengaging ridges and grooves to minimize friction and produce a positive rotary drive from the drive member to the positioning member.

Growing community of inventors

Suwon, South Korea

Cheol-sung Yeon