Samsung Electronics Co., Ltd.

Hyundai Motor Company

Kia Corporation

Kia Motors Corporation

Korea Electric Power Corporation

Yong-Woo Park

Hong-Seok Choi

Yong-Won Jeong

Jae-Jin Hwang

Un-Chul Paek

Jung-Il Park

Dug-Young Kim

Mun-Hyun Do

Chan-Geu Park

Hyun-Soo Park

Jun-jin Kong

Young-Joo Chung

Chang-Seok Kim

Kyung-Ho Kwack

Jun-Jin Kong

Kyung-Ho Kim

Young-Chul Kim

Jin-Han Kim

Woo-Joo Jung

Sung-Koog Oh

Sung-Uk Choi

Jik-Soo Shin

Keon-Soo Jin

Ghie-Hugh Song

Sung-In Ro

Kang-Se Lee

Hideki Koide

Ig-yong Lee

Hong-Jik Lee

Nak-ho Chung

Doc-Jun Byun

Jeung-il Park

Min-Hee Choi

Hyeon-cheol Kim

Kwang-Heung Jang

Jae-Deuk Lee

Byoun-Hun Jung

Dong-Yool Kim

Min-Ki Yeo

Front center position lamp for vehicles

Head lamp for vehicles

Rear center inside position lamp for vehicles

Rear lamp clusters for vehicles

Rear center outside position lamp for vehicles

Disclosed are an apparatus and method for diagnosing electric power equipment. The apparatus includes a measuring unit including a pan/tilt module mounted on the top of a vehicle and an imaging module mounted on an upper portion of the pan/tilt module, a determination unit for determining whether electric power equipment is detected by the measuring unit, a controller for performing control to capture a thermal image of the electric power equipment using the measuring unit, and a processing unit for dividing the thermal image into an analysis target equipment region, a non-interest equipment region, and a background noise region through pattern analysis of the thermal image and diagnosing the electric power equipment as being normal or as being abnormal on the basis of temperature information included in the analysis target equipment region.

Apparatus and method for diagnosing electric power equipment using thermal imaging camera

A sequential turn signal for a vehicle may include a light source; a filter configured to project a beam from the light source; a shield configured to block a projection area of the beam passing through the filter; and a lens positioned at an opposite side of the filter in relation to the shield. A degree of blinking of the lens is changed according to a degree to which the projection area is blocked by the shield.

Sequential turn signal using laser source and method for sequentially blinking the same

Disclosed is a residual stress measuring system for measuring the residual stress in an optical fiber. The residual stress measuring system comprises a light source for generating light used to measure the residual stress, a lens system for converting the generated light into a plane wave, a polarimeter for transforming the converted light to an input polarized light, which is incident on the optical fiber, a rotational measuring section for rotating the optical fiber so as to enable the polarized light to transmit through the optical fiber in various directions, and a detector for detecting the residual stress from a phase shift of the transmitted light.

Residual stress measuring system for optical fibers

An optical fiber for maximizing residual mechanical stress and an optical fiber grating fabricating method using the optical fiber are provided. The optical fiber includes a core formed of silica, for propagating light, and a cladding formed of boron-doped silica, surrounding the core. Alternatively, the optical fiber includes a core formed of phosphorous-doped silica and a cladding formed of silica, surrounding the core.

Optical fiber maximizing residual mechanical stress

Disclosed is an apparatus for measuring a residual stress and a photoelastic effect of an optical fiber, which includes: a light source; a rotary type optical diffuser distanced from the light source in a predetermined distance for suppressing the spatial coherence of a light radiated in the light source; an optical condenser for condensing the radiated light passed through the optical diffuser into a spot where the optical fiber is located; a polarizer for polarizing the light passed through the optical condenser into a 45&deg; linear polarized light from an axis of the optical fiber; a polarization analyzer, installed at 90&deg; angle with respect to the polariscope and attached closely with the optical fiber, to prevent the penetration by the background image of the optical fiber; an optical fiber strain unit including a strain sensor for straining the optical fiber on the polarization analyzer toward a longitudinal direction and measuring the strain on the optical fiber; an object lens for magnifying the image of the light penetrated through the optical fiber; and a charge coupled device(CCD) array for measuring the penetration variation of the optical fiber caused from the strain caused by the optical fiber strain unit over the optical fiber.

Apparatus and method for measuring residual stress and photoelastic effect of optical fiber

An apparatus and method for measuring residual stress and photoelastic effect of an optical fiber is disclosed. The apparatus includes a rotating light diffuser for providing temporally averaged uniform image by restraining spatial coherence of light emitted from a light source to be completely scattered, a collecting lens for aligning the light passed through the rotating light diffuser in an optical fiber, a linear birefringence device for linearly controlling the polarization state of the aligned light input from the collecting lens, a condenser for condensing the light passed through the linear birefringence device on a place where the optical fiber is located, a fixed polarizer for transforming the polarization state of the light passed through the optical fiber to the intensity distribution by allowing the light emitted from the linear birefringence device to transmit the optical fiber, an objective lens for obtaining a magnified optical fiber image having the intensity distribution of the light transmitted the optical fiber, and a unit for measuring transmittance variation given to the optical fiber depending on locations.

Disclosed is an apparatus for measuring a residual stress and a photoelastic effect of an optical fiber, which includes: a light source; a rotary type optical diffuser distanced from the light source in a predetermined distance for suppressing the spatial coherence of a light radiated in the light source; an optical condenser for condensing the radiated light passed through the optical diffuser into a spot where the optical fiber is located; a polarizer for polarizing the light passed through the optical condenser into a 45&deg; linear polarized light from an axis of the optical fiber; a polarization analyzer, installed at 90&deg; angle with respect to the polariscope and attached closely with the optical fiber, to prevent the penetration by the background image of the optical fiber; an optical fiber strain unit including a strain sensor for straining the optical fiber on the polarization analyzer toward a longitudinal direction and measuring the strain on the optical fiber; an object lens for magnifying the image of the light penetrated through the optical fiber; and a charge coupled device (CCD) array for measuring the penetration variation of the optical fiber caused from the strain caused by the optical fiber strain unit over the optical fiber.

Method of fabricating optical fiber gratings maximizing residual mechanical stress in the optical fibers

Growing community of inventors

Seoul, South Korea

Yong-Woo Park