• 제목/요약/키워드: Micro lens array

검색결과 65건 처리시간 0.034초

그레이스케일 마스크를 이용한 미소렌즈 배열의 제작 (Fabrication of micro-lens arrays using a grayscale mask)

  • 조두진;성승훈
    • 한국광학회지
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    • 제13권2호
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    • pp.117-122
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    • 2002
  • 홀로그래픽 필름으로 제작된 그레이스케일 마스크를 통하여 두꺼운 포토레지스트를 자외선으로 근접 노광하여 주기 300 $\mu\textrm{m}$, 두께 17 $\mu\textrm{m}$, 초점거리 2.2 mm인 10$\times$10 미소렌즈 배열을 제작하였다. 그레이스케일 마스크는 컴퓨터로 설계한 미소렌즈 배열을 필름 출력기를 이용하여 고해상도 흑백 필름에 그레이스케일로 기록 및 현상하고 이를 다시 홀로그래픽 필름에 축소복사(6.6배)하여 제작하였다. 본 제작방법은 저렴한 비용으로 100%에 가까운 fill-factor를 얻을 수 있고, 비구면 렌즈를 구현하기가 쉽다는 장점을 가진다.

Meltback Micro-lens Array for New Optical devices

  • Hahm, S.H.;Yoo, T.K.;Kwon, Y.S.
    • 한국광학회:학술대회논문집
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    • 한국광학회 1990년도 제5회 파동 및 레이저 학술발표회 5th Conference on Waves and lasers 논문집 - 한국광학회
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    • pp.207-210
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    • 1990
  • The mechanisms of the meltback etching and regrowth processes are studied experimentally. The depth and time of the meltback is poltted with the experimental data and fitted with some functions. The method to reduce the anisotropy and elliminate the gallium is lands are also developed. It is possible to fabricate the AlGaAs micro-lens array by the use of the process and apply it to a new optical devices.

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미세압축성형을 통한 플라스틱 미세렌즈의 성형 (Fabrication of micro lens array using micro-compression molding)

  • 문수동;강신일;이영주;부종욱
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2000년도 추계학술대회논문집A
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    • pp.743-746
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    • 2000
  • Plastic microlenses play an important role in reducing the size, weight, and the cost of the systems in the fields of optical data storage and optical communication. In the present study, plastic microlens arrays were fabricated using micro-compression molding process. The design and fabrication procedures for mold insert were simplified by using silicon instead of metal. A simple but effective micro compression molding process, which uses polymer powder, were developed for microlens fabrication. The governing process parameters were temperature and pressure histories and the micromolding process was controlled such that the various defects developing during molding process were minimized. The radius and magnification ratio of the fabricated microlens were $125{\mu}m$ and over 3.0, respectively.

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미세압축성형을 통한 플라스틱 미세렌즈의 성형 (Fabrication of Micro Lens Array Using Micro-Compression Molding)

  • 강신일;문수동;이영주;부종욱
    • 대한기계학회논문집A
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    • 제25권8호
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    • pp.1242-1245
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    • 2001
  • Plastic microlenses play an important role in reducing the size, weight, and the cost of the systems in the fields of optical data storage and optical communication. In the present study, plastic microlens arrays were fabricated using micro-compression molding process. The design and fabrication procedures for mold insert were simplified by using silicon instead of metal. A simple but effective micro compression molding process, which uses polymer powder, were developed for microlens fabrication. The governing process parameters were temperature and pressure histories and the micromolding process was controlled such that the various defects developing during molding process were minimized. The radius and magnification ratio of the fabricated microlens were 125$\mu\textrm{m}$ and over 3.0, respectively.

기계적 미세 가공 시스템 구성 및 응용 연구 (A Study on the Mechanical Micro Machining System set-up and Applications)

  • 제태진;이응숙;최두선;이선우
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2001년도 춘계학술대회 논문집
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    • pp.934-937
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    • 2001
  • It is well-known that the micro fabrication technology of micro parts are the high energy beam or silicon-based micro machining method such as LIGA Process, Laser machining, photolithography and etching technology. But, for fabricating complex 3-D structure it is better to use mechanical machining. This machining method by the mechanical machine tool with nanometer accuracy is getting attention in some field-especially micro optics machining such as grating, holographic lens, micro lens array, fresnel lens, encoder disk etc.. In this study, we survey the micro fabrication by mechanical cutting method and set up the mechanical micro machining system. And we carried out micro cutting experiments for micro parts with v-shape groove.

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마이크로 렌즈 어레이 금형의 가공특성에 관한 연구 (A Study on the Machining Characteristics for Micro Lens Array Mold)

  • 정재엽;이동주;홍성민;제태진;이응숙
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 2002년도 추계학술대회 논문집
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    • pp.370-375
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    • 2002
  • Recently, the interest on micro optical parts has increased rapidly with the development of technology related to microsystems. Among the optical parts, micro lens is one of the most broadly used micro parts. To mass-produce the micro lenses, it is very effective to use the mold insert and injection molding process. There are many methods to fabricate the mold insert for micro lenses: electroforming, etching, mechanical micromachining and so on. In this study, we fabricated the mold insert for micro lenses using a micro ball endmill to apply mechanical micromaching method and analyzed the effect of main process parameters such as spindle speed, feed rate, dwell time on the processed surface. Then, using fabricated the mold insert we fabricated the micro lenses through injection molding process.

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연질재료의 마이크로 구형렌즈금형 가공특성에 관한 연구 (A Study on the Manufacturing Characteristics for Micro Spherical Lens Mold of Soft Materials)

  • 홍성민;이동주;제태진;최두선;이응숙
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2004년도 추계학술대회 논문집
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    • pp.1466-1469
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    • 2004
  • Micro spherical lens mold processing method based on mechanical one completes a spherical shape by setting a diamond tool of hundreds $\mu$m radius on spins with high speed and then using Z-axis vertical feeding motion like the fabrication of micro drilling. In this method, we can see unprocessed parts shaped like cylinder and cone and check increasing chatter marks and burrs by setting errors of the central axis of rotation on the edge of the tool. That is why this method doesn't suit for the optical lens mold. In this paper presents unprocessed parts are disappeared and chatter marks and burrs are decreased from centre of the lens after using Run-out measuring and setting system on run-out occurred from setting tool. Also the fabrication characteristics of 6:4 Brass, A1601, PMMA are compared and analyzed, establishing the optimum machining condition on each material.

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Micro Lens Array Film을 이용한 백색 OLED의 발광 특성 (Emission Characteristics of White Organic Light-Emitting Diodes Using Micro Lens Array Film)

  • 천현동;나현석;양재웅;주성후
    • 한국표면공학회지
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    • 제46권2호
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    • pp.93-97
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    • 2013
  • We studied the emission characteristics of white phosphorescent organic light-emitting diodes (PHOLEDs), which were fabricated using a two-wavelength method. To optimize emission characteristics of white PHOLEDs, white PHOLEDs with co-doping and blue/co-doping emitting layer (EML) structures were fabricated using a host-dopant system. The total thickness of light-emitting layer was 25 nm and the dopant of blue and red was FIrpic and $Bt_2Ir(acac)$ in UGH3, respectively. In case of co-doping structure, applying micro lens array film showed efficiency improvement from the current efficiency 78.5 cd/A and power efficiency 40.4 lm/W to the current efficiency 131.1 cd/A and power efficiency 65 lm/W and blue / co-doping structure showed efficiency improvement from the current efficiency 43.8 cd/A and power efficiency 22 lm/W to the current efficiency 69 cd/A and power efficiency 32 lm/W.