• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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• pp.214-214
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• 2000

This paper deals with the non contact optical sensor to measure the shape of transparent plates such as glass panel of LCD(Liquid Crystal Display). The conventional methods to obtain the shape or thickness of a transparent plates are contact type sensor such as LVOT(Linear Variable Differential Transformer). Due to the contact between the tip of the sensor and the surface of objects, the tip is abraded. In addition, the high temperature glass casting makes the size of sensor body changed. These reasons makes the sensor degraded. In this paper, to overcome these problem, we proposed a low cost noncontact optical sensor this is composed of the Hologram laser unit of a CD-Pickup and a plastic lens. To evaluate the performance of the proposed optical sensor, a series of experiments were performed for various measurement condition. Based upon observation of the experimental result, the developed sensor shows good result for measuring the shape of transparent plates.

• 한국공작기계학회논문집
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• 제18권1호
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• pp.76-82
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• 2009

To obtain the surface roughness with nano order, we need a ultra-precision machine, cutting condition, and materials. In this paper, the cutting condition for getting nano order smooth surface of core have been examined experimentally by the ultra-precision machine and diamond wheels. The effects of the cutting velocity, the feed rate and depth of cut on the surface roughness were studied. And also, the surface roughness was measured by the Form Talysurf series PGI 840. The champion data of developed core was surface roughness Rmax 24.6nm, figure accuracy Rmax 68.9nm.

• 한국분무공학회지
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• 제17권1호
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• pp.9-13
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• 2012

This study investigates experimentally evaporation characteristics of nanofluid droplets containing 50 nm alumina($Al_2O_3$) particles and the wettability changes on a hydrophilic glass surfaces. From the captured digital images by using a CMOS camera and a magnifying lens, we examined the effect of particle concentration on droplet evaporation rate which can be indirectly deduced from the measured droplet volumes varying with time. In particular, with the use of a digital image analysis technique, the present study measured droplet perimeters and the contact angles to study the wetting dynamics during evaporating process. In addition, we compared the measured total evaporation time with theoretically estimated values. It was found that as the volume fractions of nanofluid increased, the total evaporation time and the initial contact angles decreased, while the droplet perimeters increased.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1997년도 한국자동제어학술회의논문집; 한국전력공사 서울연수원; 17-18 Oct. 1997
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• pp.1880-1883
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• 1997

An Parallax-Barrier type autostereoscopic display system is implemented to overcome the handicap of current glass-typed stereo imaging system which gives operators unnatural feeling and reluctance. This system is composed of image mixing part of two input images, A/D transformation part, scan conversion part to eliminate the rainbow interference phenomenon, and pin-hole type barrier lens. For the fine display the accurate slit width of barrier is calculated in consideration of retina size, and the samsung 10.4" TFT-LCO was used as flat display monitor.itor.

• 광학세계
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• 통권138호
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• pp.26-28
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• 2012

(주)모노클(대표 이강수 www.monocle.co.kr)은 LCD, PDP, OLED 제조공정에서 필요로 하는 광학 Stage의 국산화와 가공기술개발에 앞장서 왔다. 현재 정밀 Quartz 및 Ceramic가공 기술을 바탕으로 Lens, Prism, Mirror & Filter Stage Glass, Micro & Macro Optical Parts, Optical Systems 등을 주력으로 생산해 오고 있다. 작은 중소기업이지만 (주)모노클이 세계시장에서 경쟁할 수 있는 제품을 생산하며 큰 역량을 발휘할 수 있었던 원동력은 꾸준히 연구개발에 투자하여 기술집약적 토대를 만들었기 때문이다.

• 정보저장시스템학회:학술대회논문집
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• 정보저장시스템학회 2005년도 추계학술대회 논문집
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• pp.113-118
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• 2005

Small form factor optical disks for near-field optics using solid immersion lens were developed. Disk durability properties in terms of head-disk interface (HDI) properties were investigated by drag test, diamond like carbon film and lubricant film were coated on the small form factor disk to enhance HDI. Disks with glass substrates and lubricant films after heat treatment showed more durable characteristics. Coverlayers made of UV resin were uniformly coated by spin coating In which the ski-jump could not be formed by adopting outer ring technique.

• 정보저장시스템학회논문집
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• 제2권1호
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• pp.26-31
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• 2006

Small form factor optical disks for near-field optics using solid immersion lens were developed. Diamond like carbon film and lubricant film were coated on the small form factor optical disk to enhance the head-disk interface(HDI) characteristics. The disk durability properties in terms of HDI phenomena were investigated by drag test. Disks with glass substrates and the lubricant films experienced heat treatment showed more durable characteristics. Coverlayers made of UV resin were uniformly coated by spin coating in which the ski-jump could be removed by adopting outer ring technique

• 비파괴검사학회지
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• 제27권2호
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• pp.183-189
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• 2007

광산업 발전과 더불어 초정밀 가공부품이 요구되고 있다. 광산업 분야의 중요부품인 광커넥터의 페롤(ferrule) 및 광학기기용 렌즈이다. 특히, 이 렌즈는 높은 형상정밀도와 결함이 포함되지 않는 등 높은 신뢰성이 요구되는 실정이다. 이들 광소자들은 광원의 손실을 줄이기 위해서는 이들 부품의 초정밀 가공이 필수적이며 양품과 불량품을 판별하기 위해 완성단계에서 다양한 비파괴 검사가 이루어지고 있다. 공명 초음파 분광법은 물체의 형상, 탄성, 결정의 방향, 밀도 등에 의해 결정되는 공진주파수 응답 특성을 비교 분석하여 재료의 형상변화, 탄성정수 및 결함의 유 무를 검출해내는 방법이다. 따라서 현재 레이저용 프린터에 사용되는 비구면 렌즈의 질량 변화에 따라 공진크기 및 공진주파수 응답 특성을 통하여 분석하였다.

• 한국안광학회지
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• 제13권3호
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• pp.7-12
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• 2008

목적: 투명과 착색 안경렌즈의 자외선 차단 특성을 평가하고자 하였다. 방법: 안경렌즈의 투과 스펙트럼은 ANSI Z80.1에 제시된 방법으로 측정하였고, UV(200~380 nm; UVA, UVB, UVC) 및 청색광 영역(380~400 nm)에 대하여 각 렌즈의 투과율을 계산하였다. 결과: 중굴절률, 고굴절률의 투명 플라스틱 렌즈 및 착색 플라스틱 렌즈는 UV에서 우수한 자외선 차단 특성을 보였으나, 자외선 차단제를 처리하지 않은 크라운 유리나 CR39는 그렇지 않았다. 고굴절률 렌즈와 눈부심 방지 야간용 렌즈를 제외한 모든 렌즈는 청색광을 효과적으로 차단하지 않았다. 결론: 크라운 유리와 CR39 렌즈는 UV로부터 눈을 보호하기 위해서 자외선 차단제가 필요하다. 또한 고굴절률 렌즈와 눈부심 방지 야간용 렌즈를 제외한 모든 렌즈는 청색광으로부터 눈을 보호하기 위해서 청색광 차단제가 필요하다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 춘계학술대회 논문집
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• pp.629-632
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• 2005

ELID(ELectrolytic In-process Dressing) grinding is an excellent technique for mirror grinding of various advanced metallic or nonmetallic materials. A polishing process is also required for elimination of scratches present on ELID grinded surfaces. MAP(Magnetic Assisted Polishing) has been used as a polishing method due to its high polishing efficiency and to its resulting in a superior surface quality. This study describes an effective fabrication method combining ELID and MAP of nano-precision mirror grinding for glass-lens molding mould, such as WC-Co, which are extensively used in precision tooling material. And for the optics glass-ceramic named Zerodure, which is extensively used in precision optics components too. The experimental results show that the combined method is very effective in reducing the time required for final polishing. The best surface roughness of the polished glass-ceramic was within 1.7nm Ra in this study.