Samsung Electronics Co., Ltd.

Tdk Corporation

Jae-Cheol Bae

Taek-Seong Jeong

Tae-Kyung Kim

Takashi Kikukawa

Kyong-Tae Park

Hyun-Soo Park

Narutoshi Fukuzawa

In-oh Hwang

Tatsuhiro Kobayashi

In-hak Na

Seong-Woon Kang

In-Joo Kim

Young-jae Park

Kyung-geun Lee

Sung-hee Hwang

Tatsuhiro Otsuka

Jun-Ho Koh

Hyun-Jung Kim

Kwang-Dek An

Hyun-jung Kim

Jun-ho Koh

Young-min Cheong

Sung-hyun Kim

Jin-Kyung Lee

Joo-Ho Kim

Chang-han Kim

Moon-il Jung

Joo-ho Kim

Ki-woo Lee

Tae-kyoung Kim

In-Oh Hwang

Shi-hong Park

Myong-jo Choi

Chang-Han Kim

Hui Zhao

Da-hye Chol

In-Hak Na

Myong-Jo Choi

Provided are a wearable display device and a light guide element thereof, the display device including: a display element configured to project a first light forming a virtual image; and a light guide element configured to guide the first light from the display element and a second light input from outside of the wearable display device to a predetermined position. The light guide element includes: a first optical surface facing the display element; a second optical surface and a third optical surface configured to reflect the first light input through the first optical surface; and a fourth optical surface configured to reflect the reflected first light to the predetermined position. The first to third optical surfaces are flat surfaces, and the fourth optical surface is a rotationally asymmetric reflective surface.

Wearable display apparatus having a light guide element that guides light from a display element and light from an outside

A wearable device and a method of outputting a virtual image by the wearable device area provided. The wearable device includes a projection type display unit that includes a variable lens and configured to project a light forming an image, a first sensor configured to detect a light reflected from an eye of a user, and a processor configured to control to display the virtual image on the projection type display unit by controlling one of a location of the variable lens and refractive power of the variable lens based on retina image information corresponding to the detected light.

Wearable device and method for outputting virtual image

A tele-lens includes a first prism lens configured to change a light path of light, which is transmitted along a first optical axis, from an object side to a second optical axis, and an optical element configured to change the light path from the second optical axis to a third optical axis, wherein the tele-lens satisfies the following condition of 0.9&#x3c;TTL/EFL&#x3c;1.5, where EFL is an effective focusing distance of the tele-lens and TTL is an entire length of the tele-lens.

Tele-lens and imaging device

A curved-type optical lens assembly and an electronic device are provided. The optical lens assembly focuses an image of an object on the image sensor. The optical lens assembly includes a reflector configured to reflect incident light, a lens array including a plurality of lenses arranged between the reflector and the image sensor, a first light blocker arranged at an object side of the reflector to block the light, and a second light blocker arranged at an image side of the reflector to block the light. The optical lens assembly further includes a first optical axis of the light proceeding towards the reflector and a second optical axis of the light reflected by the reflector.

Optical lens assembly and electronic device including the same

An endoscope apparatus including a first optical system and a second optical system is provided. The first optical system includes a first lens system configured to form a first optical image of a first object and a first image sensor configured to convert the first optical image into first image data and output the first image data. The second optical system includes a second lens system configured to form a second optical image of a second object and a second image sensor configured to convert the second optical image into second image data and output the second image data.

Ultra-wide range observation endoscope apparatus

An optical memory device and a method of recording/reproducing information by using the optical memory device. The optical memory device includes a substrate; a first barrier layer formed on the substrate; a quantum well layer; a second barrier layer; a quantum dot layer; and a third barrier layer. The quantum well layer has an energy band gap which is wider than that of the quantum dot layer, and the second barrier layer has an energy band gap which is wider than that of the quantum well layer, so that electrons in excitons which are generated in the quantum dot layer by light of a certain wavelength are captured by the quantum well layer to record information, and then, recorded information may be erased or reproduced by irradiating light of a certain wavelength to the optical memory device.

Optical memory device and method of recording/reproducing information by using the same

A method and apparatus to control a position in which data is to be recorded on a holographic data recording medium by using interference between a reference light and a signal light, the method including: irradiating the reference light and the signal light on the holographic data recording medium; generating a focus error signal that indicates a distance difference between a first focus corresponding to a focus of the reference light on the holographic data recording medium and a second focus corresponding to a focus of the signal light on the holographic data recording medium, based on information about a reflective signal light generated when the irradiated signal light is reflected from a reflective transmission layer of the holographic data recording medium; and moving the second focus to a position of the first focus, based on the focus error signal.

Method and apparatus for controlling position in which data is to be recorded

A method of recording holographic information includes recording a hologram mark and a homogeneous mark in a holographic data storage medium with a volume to alternatively locate the hologram mark and the homogeneous mark. The hologram mark has a varied refractive index distribution due to constructive/destructive interferences between two light beams and indicates information, while the homogeneous mark has a more uniform refractive index distribution than the hologram mark.

Method of recording holographic information using hologram mark and homogeneous mark

An optical pickup of a holographic data recording/reproducing apparatus that emits light to a reflective holographic data storage medium in which a substrate, a reflection layer, a recording layer, and a cover layer are sequentially stacked, and receives the emitted light, the optical pickup including: a first light source unit to emit, during a recording operation, a signal beam having a first polarization and a reference beam having a second polarization perpendicular to the first polarization along the same optical path; and a main lens unit having a refractivity that varies according to a polarization of a passing light, so as to cause the signal beam to be reflected from the reflection layer then focused on a focal point, and to cause the reference beam to pass through the cover layer then be directly focused on the focal point.

Apparatus and method for recording/reproducing holographic data

A method and apparatus for recording and/or reproducing holographic data and a holographic information storage medium, wherein the apparatus for recording and/or reproducing holographic information includes an optical pickup emitting light onto a holographic information storage medium and receiving the emitted light. The optical pickup includes: a light source unit emitting a signal beam and a reference beam in a recording mode; and a focusing optical system focusing the signal beam and the reference beam on one focal point in the holographic information storage medium so that information can be recorded by using an interference pattern formed along a depth direction of the holographic information storage medium in the vicinity of the focal point, wherein the numerical aperture of the focusing optical system for the signal beam is different from the numerical aperture of the focusing optical system for the reference beam.

Apparatus and method for recording/reproducing holographic data and holographic data storage medium

A hologram optical device, and a compatible optical pickup having the hologram optical device and an information storage medium system employing the hologram optical device. The hologram optical device includes a hologram having a pattern having a period in a 4-step stairway shape. At least one of first, second, third, and fourth steps of the 4-step stairway shape is formed in a different width from at least one other step.

Hologram optical device, and compatible optical pickup having the hologram optical device and optical information storage medium system employing the compatible optical pickup

A servo controlling apparatus of a holographic information recording/reproducing system changes the foci of reference light and signal light in a depth direction of a holographic information storage medium to record information over a plurality of information layers. A servo control is changed from a normal servo operation to a between-movement servo operation while movement between information layers is made during a recording operation, and the servo control is changed back to the normal servo operation when the movement between information layers is completed. The between-movement servo operation maintains a servo control state that exists before the movement between information layers.

Servo controlling apparatus and method of holographic information recording/reproducing system

A holographic information recording and/or reproducing apparatus including: a light source unit emitting reference light and signal light; a first optical path guiding unit guiding the lights to cross; a second optical path guiding unit including a first polarization converter located on an optical path of one of the reference and signal lights, a first polarization beam splitter located at a crossing point of the reference light and the signal light, an optical path converter guiding the reference light and the signal light so that they cross again, a second polarization converter located on an optical path of the signal light before the signal light crosses the reference light, and a second polarization beam splitter uniting the optical paths of the reference light and the signal light; and an objective lens unit illuminating the reference light and the signal light onto one side of a holographic information storage medium.

Holographic information recording and/or reproducing apparatus

A method of determining an optimum reproduction condition of a first mark recorded on an optical recording medium that is smaller than a resolution of a pickup to reproduce the first mark. The method includes obtaining an optimum reproduction condition of a second mark having a length which closely approximates the resolution of the pickup, and determining the optimum reproduction condition of the first mark using the obtained optimum reproduction condition of the second mark.

Growing community of inventors

Suwon-si, South Korea

Jae-Cheol Bae