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광 마이크로폰 설계를 위한 경사 절단된 멀티모드 광섬유의 조도분포 해석
김경우(Kim, Kyong-Woo),제우성(Che, Woo-Seong),권휴상(Kwon, Hyu-Sang) 한국소음진동공학회 2008 한국소음진동공학회 논문집 Vol.18 No.12
For designing intensity modulation type optical microphone, the irradiance distribution which can be applied to inclined-cut geometrical configuration is suggested. The model is important in analysis of response characteristics for intensity modulation type optical microphone. To overcome low sensitivity problem in intensity modulation type optical microphone, inclined-cut optical fiber is considered here. Based on optical geometry, the inclined-cut optical fiber sensor is designed and fabricated. The experiments are carried out to evaluate sensor performance.
소형화 연 X-선 투과현미경을 위한 새로운 광학설계와 개발
김경우(Kyong-Woo Kim),권영만(Young-Man Kwon),김규겸(Kyu-Gyeom Kim),김재희,민종환(Jong-Hwan Min),임종혁(Jong-Hyeok Lim),남기용(Ki-Yong Nam),민진영(Jin-Young Min),윤권하(Kwon-Ha Yoon) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
In this paper the conceptual design and development of a compact vertical type soft x-ray microscope is described. This x-ray microscope operates in the water window wavelength region (2.3~4.4㎚), where natural contrast between carbon (protein) and oxygen (water) allows imaging of unstained biological material their natural, hydrated environment. Until now, operational x-ray microscopes are based on synchrotron radiation sources, which limit their accessibility. Many biologists would benefit from having the x-ray microscope as a tool among other tools in their own laboratory. For this purpose we introduced the compact vertical type soft X-ray microscope with 50 ㎚ resolution for biomedical application. The compact vertical type soft x-ray microscope is based on a laser plasma x-ray source, doubled ellipsoidal condenser reflective optics, diffractive zone plate optics and MCP coupled with CCD to record an x-ray image. The source is a liquid-jet target laser plasma source, which is practically debris free and suitable for high average power operation. The flux, brightness and bandwidth of this source has been simulated and optimized for X-ray microscopy for biology application. A doubled ellipsoidal condenser reflective mirror operates as condenser and illuminates the sample. The high resolution imaging is currently performed with a ~12% efficient Au zone plate with an outmost zone width of 36㎚. Detection is performed with a Chevron typed MCP coupled with CCD.