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레이저 다이오드를 이용한 정현파 위상변조 간섭에 의한 실시간 극미세 진동 측정에 관한 연구
강성철(Kang Sungchul),진상규(Jin Sangkyu),지철근(Chee Chulkeun) 한국조명·전기설비학회 1991 한국조명·전기설비학회 학술대회논문집 Vol.1991 No.-
A new signal processing system for real time displacement measurement in sinusoidal phase modulating interferometry is described. Although sinusoidal phase modulating interferometry is effective in measuring with high accuracy the displacement of an object, conventional signal processing takes along time. In this method, detection of the object"s displacement is easily achieved by sampling the interference signal at those times that satisfy certain conditions and by processing the sampled signals with electric circuits in real time. The delay time of this signal processing system is 〈 45㎲. Specially in this paper we describe all electronic circuit and optical system design.