The Evaluation on the frequency Characteristics of the Optical Glass Lens by Resonant Ultrasound Spectroscopy

RUS법에 의한 광학기기용 렌즈의 주파수 특성평가

  • Published : 2005.04.30

Abstract

The optical glass lens is required high dimensional precision such as the lack of defect. In this paper, we examined the detectable defect by using the resonant ultrasound spectroscopy(RUS). The RUS is the measurement system which is to excite the specimen and to inspect the differences of resonant frequency pattern between acceptable specimen and specimen which has some defects. In this paper, for nondestructive evaluation by using RUS, we measured the resonant frequency of each specimen which is spherical and aspherical glass lens. With the results, we knew the polishing processing degree of spherical glass lens by the measured resonant frequency and could evaluate the characteristic of aspherical glass lens about some flaws.

광학기기용 렌즈는 결함이 없는 높은 형상정밀도가 요구되어지는 제품으로써 본 논문에서는 공명초음파 분광법을 이용하여 결함을 검출하는 시험을 하였다. RUS는 시험편을 가진 시켜 양품시험편과 결함을 갖는 시험편 사이의 공진주파수 차를 검사하는 측정시스템이다 RUS를 이용한 비파괴 평가를 위하여 우리는 구면렌즈와 비구면 렌즈의 공진주파수를 측정하였다. 그 결과, 우리는 측정된 공진주파수에 의해 구면렌즈의 연마 가공정도를 알 수 있었으며, 결함을 갖는 비구면 렌즈의 특성평가를 할 수 있었다.

Keywords

References

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