Abstract:
본 발명은 주사 간섭 현미경에 관한 것이다. 본 발명에 따른 주사 간섭 현미경은, 광원; 편광빔스플리터(PBS); 음향 광학 장치(AO Device); 중심변조주파수(f RF0 )를 기준으로 하여 주파수 가변 범위(Δf)내에서 디더링(dithering)되는 변조 주파수(f RF )에 따라 AO 장치를 구동시키는 AO 구동부; 신호빛과 기준빛의 간섭 신호를 검출하는 광검출소자; 변조주파수를 이용하여 상기 간섭 신호를 복조하여 출력하는 RF 복조기; 상기 RF 복조기로부터 제공되는 신호를 디더링 주파수(f dithering )를 이용하여 복조하여 출력하는 록인앰프; 사전 설정된 진폭(A)과 디더링 주파수(f dithering )를 갖는 디더링 신호를 생성하여 AO 구동부로 제공하고 상기 디더링 주파수(f dithering )를 상기 록인앰프로 제공하는 함수 생성기; 상기 록인앰프로부터 출력된 신호를 이용하여 샘플에 대한 정보를 검출하는 제어부;를 구비한다. 본 발명에 따른 주사 간섭 현미경은 변조주파수를 변동시킬 수 있는 음향광학장치를 이용하여 샘플의 국부기울기에 대한 정보를 획득함으로써, 샘플의 표면을 정확하게 측정할 수 있을 뿐만 아니라, 외부의 변화(noise)로 인한 샘플의 전반적인 기울기 변화도 측정 가능하여 보다 안정적인 측정이 가능해진다.
Abstract:
PURPOSE: A bio-sensor measuring system is provided to control measure signal by initially set prism angle and phase delay value and to enlarge dynamic range. CONSTITUTION: A SPR(surface plasmon resonance) bio-sensor measuring system using active feedback comprises: a light source providing light; an SPR system(530) which generates measured signal and to outputs measured signal; a compensator(520) which is placed between the light source and SPR system and delays the phase of the light provided from the light source, and outputs; a signal output unit(550) which generates interference signals of reference beam and signal beam and generates a first detection signal; a first driving control unit(570) which generates a first driving signal for diving the compensator using the first detection signal; and a phase-delayed compensator driving unit(525) for driving the phase-delayed compensator. [Reference numerals] (500) Light source; (540) Rotary motor; (542) Rotary motor driving unit; (570) First driving control unit; (572) Second driving control unit; (590) Signal processing unit
Abstract:
PURPOSE: A cell patterning and pattern measuring device using an optical pickup module is provided to directly control cell patterning without a separate mask and to measure a bio chip and a micro structure at the same time as cell patterning. CONSTITUTION: A cell patterning and pattern measuring device comprises a laser controller(120) and an auto-focusing unit. The laser controller control the laser beam output of a light source(100) according to a patterning mode or a pattern measuring mode. The auto-focusing unit implements auto-focusing using the light reflected off an object to which the laser beam is irradiated. The auto-focusing unit comprises an astigmatic lens(142), a 4-split photodiode(144) generating a focus error signal from the light passing through the astigmatic lens, and a focus error signal servo(140) which receives the focus error signal from the 4-split photodiode and controls a driving unit form transferring an objective lens(114) in an optical axis direction to implement auto focusing.
Abstract:
The present invention relates to a biochemical fluidic channel read-out sensor which can obtain stability for a long time using a dual heterodyne interferometer. The biochemical fluidic channel read-out sensor comprises: a sample input device having fluid channels; and a dual beam generator for dividing light generated from a light source into first and second beams in parallel. A first interferometer is formed by the first beam, and a second interferometer is formed by the second beam. The first and second interferometers are formed of the same light route in a state of being separated from each other at the distance between the first and second beams. The dual heterodyne interferometer of the biochemical fluidic channel read-out sensor implements the two interferometers actually having the same route in the optical structure of one interferometer using dual beams. Thus, the biochemical fluidic channel read-out sensor obtains the stability for a long time. [Reference numerals] (AA) Metal nanoparticle; (BB) Adhesive strength; (CC,FF) Support; (DD) Measure the adhesive strength; (EE) Metal-coated probe of an AFM
Abstract:
PURPOSE: A free-space optical communication module is provided to input and output an incident light and an emitting light through one lens unit. CONSTITUTION: An optical communication module (10) comprises a light transmitting unit including a light emitting device (LED) (112), a light receiving unit including a photodetector (122), and a lens unit (100). The lens unit is defined by coupling a first lens having a first focal distance and a second lens having a second focal distance. The LED is disposed at a first position at which light outputted from the LED in depth of focus of the first lens spreads at a predetermined divergence angle in correspondence with an optical communication direction. The photodetector is disposed at a second position at which the real image of the light received from the LED of the other optical communication module in depth of focus of the second lens is formed in correspondence with an optical communication direction. [Reference numerals] (116) First amplifier; (118) First signal processor; (126) Second amplifier; (128) Second signal processor
Abstract:
본 발명은 AOM을 이용한 헤테로다인 간섭계이다. 상기 헤테로다인 간섭계는, 광원; 편광빔스플리터; 제1 빛살과 제2 빛살을 일정 각도로 분리하여 출력하는 음향 광 변조기(AOM); 구동 주파수( f RF )에 따라 AOM을 구동시키는 AOM 구동부; 상기 AOM으로부터 출력된 제1 빛살이 진행하는 경로상에 배치되어, 탐사빛(Signal beam)을 제공하는 제1 거울; 상기 AOM으로부터 출력된 제2 빛살이 진행하는 경로상에 고정되어 배치되어 기준빛(Reference beam)을 제공하는 제2 거울; 제1 거울을 움직이게 하는 거울 구동부; 상기 AOM과 거울들과의 사이에 배치되는 QWP; AOM으로부터 출력된 후 PBS에서 반사되어 제1 경로를 따라 진행하는 빛살들에 대한 제1 간섭 신호를 검출하여 출력하는 제1 광검출소자; AOM으로부터 출력된 후 PBS에서 반사되어 제2 경로를 따라 진행하는 빛살들에 대한 제2 간섭 신호를 검출하여 출력하는 제2 광검출소자; 제1 광검출소자 및 제2 광검출소자로부터 제1 간섭 신호 및 제2 간섭 신호의 차이값을 출력하는 차동 증폭기; 변조 주파수를 이용하여 차동 증폭기로부터 제공된 신호를 복조하여 탐사빛에 대한 위상 및 진폭변화를 검출하는 복조기; 를 구비한다.
Abstract:
PURPOSE: A heterodyne light coherent tomographic device using an acoustic light modulation filter is provided to secure information rapidly using a light detection element. CONSTITUTION: A broadband light source provides the rays of light. A polarization beam splitter(310) controls the rays of the light to penetrate or to be reflected depending on the state of polarization. A scanning mirror(340) scans the surface of a sample. A demodulator(376) demodulates detected Interference signals for outputting. A control part(380) detects the tomography information of the sample. [Reference numerals] (330) AOTF driver; (376) Demodulator;