http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 주제어 : Ball-lens (볼렌즈) (검색결과 6 건)
- 무료
- 기관 내 무료
- 유료
-
김성훈(Seunghoon Kim),백경윤(Kyungyun Baek),박노식(Nosik Park),민한기(Hangi Min),정상화(Sanghwa Jung),양인영(Inyoung Yang) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, For nondestructive evaluation of Ferrule and Ball lens, we made of the measuring system by RUS. We evaluated existence of flaws through comparison with resonant frequency of Ferrule and Ball lens. The objective of the paper is to evaluate defect and shape error by using nondestructive evaluation method with Resonant Ultrasound Spectroscopy(RUS). RUS system is configured of spectrum analyzer, power amplifier, PZT sensor and support frame. For defect evaluation by the RUS, we performed to measure natural frequency of Ferrule, both acceptable and cracked. In the Ball lens, we performed to investigate relationship between frequency measuring parameter(β) and mass of each specimens. And then, in the case of Ferrule, the resonant frequency of cracked-Ferrule existed to the high level frequency band than acceptable-Ferrule. p increase as the mass increase.
-
공명초음파분광법을 이용한 광컨넥터용 결합소자의 비파괴 검사
김성훈,조영재,백경윤,양순호,민한기,양인영 朝鮮大學校 機械技術硏究所 2004 機械技術硏究 Vol.7 No.1
본 연구의 목적은 비파괴 평가방법인 공명초음파분광법(RUS)을 사용하여 세라믹제 페롤과 볼렌즈의 결함과 형상오차를 평가하는 것이다. RUS시스템은 스펙트럼에너라이저,파워 엠플리파이어,압전진동자센서와 지지프레임으로 구성되어진다. RUS 시스템에 의한 페롤과 볼렌즈의 비파괴평가를 위해 본 연구에서는 각 시험편에 대한 공진주파수를 측정하였으며,측정된 공진 주파수의 비교분석에 의해 결함의 유 · 무를 판별하였다. 그 결과 페롤의 경우,크랙을 갖는 페롤의 공진주파수 대역이 양품페롤의 공진 주파수 대역보다 고주파대역으로 이동함을 알 수 있었으며,볼렌즈의 경우,시험편 질량이 감소함에 따라 공진주파수 대역이 고주파 대역으로 이동함을 알 수 있었다. 또한 볼렌즈의 공진주파수가 측정되는 대역을 예측할 수 있는 파라메타인 β를 설정하여 그 결과를 고찰하였다. The objective of this paper is to evaluate the defect and shape error of a ceramic ferrule and ball lens by Resonant Ultrasound Spectroscopy(RUS) method. RUS system is consisted of spectrum analyzer, power amplifier, PZT sensor, and support frame. For nondestructive evaluate by using RUS system, first of all, we measured the natural frequency of each specimen, and we decided on the shape and size of flaw by measured natural ferquencies. And then, in the case of ferrule, natural frequency bandwidth of ferrule with crack was higher than acceptable ferrule. As mass of ball lens decreased, natural frequency bandwidth was shifting to high-frequency range. Thus, we discussed on the relationship between β and mass of ball lens, which β is parameter that we can predict measurable natural frequency bandwidth of ball lens.
-
정재엽,이동주,홍성민,제태진,이응숙 한국공작기계학회 2002 한국공작기계학회 추계학술대회논문집 Vol.2002 No.-
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.
-
이민호(Minho Lee),조남규(Nahm-Gyoo Cho) Korean Society for Precision Engineering 2014 한국정밀공학회지 Vol.31 No.12
This paper proposes a simple method to improve a sensitivity of a straightness measurement system for a linear stage, which is applied to a system based on a geometric optic method. An optical system for this method is composed of a corner-cube retro-reflector, a ball-lens and a twodimensional position sensitive detector (2D PSD). The effectiveness of the proposed method was examined theoretically, and verified experimentally using a prototype measurement system. The results show that the measuring sensitivity was dependent on the size of the ball-lens and the setup position of PSD from the ball-lens, and that the proposed method is efficient method to improve the measuring sensitivity.
-
이민호(Minho Lee),조남규(Nahm-Gyoo Cho) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
A new measurement system is proposed that can detect five-degree-of-freedom (five-DOF) error motions of a linear stage with high sensitivity. The system divided into a moving target part and a stationary detection part. The moving target part, which is composed of three retro-reflectors, is mounted on a carriage of a linear stage. The stationary detection part is composed of three laser sources, ball-lenses, and PSDs, and placed on a reference table. Three parallel laser beams from laser sources is reflected at three retro-reflectors, and then arrived at the PSDs after passing through the ball-lenses. Relative position changes of the retro-reflectors by the multi-DOF motions of the moving target part shift the optical paths of the reflected beams, and the PSDs detect the displacement of the laser beam. The ball-lenses play a pivotal role in displacement magnification of the beam spot on PSDs. In this paper, the relationships between the output of the three PSDs and the five-DOF motions of the moving target part are derived, and the system model is defined from it. Based on the ray-tracing method, simulations are performed to estimate the proposed measurement system’s performances. The results show that the proposed method is useful to precisely measure the error motions of linear stages.
-
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
