Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Measurement of Chromatic Dispersion of an Organic Thin Film via Double-slit Interference Experiment

이중 슬릿 간섭 실험을 이용한 유기물 박막의 색분산 측정

  • Hee Sung Kim (Department of Physics, Pusan National University) ;
  • Byoung Joo Kim (Department of Physics, Pusan National University) ;
  • Myoungsik Cha (Department of Physics, Pusan National University)
  • Received : 2023.11.21
  • Accepted : 2023.12.01
  • Published : 2023.12.25
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Abstract

Since the Abbe number is a value representing the chromatic dispersion of a transparent optical medium, its measurement is essential for multicolor or white light applications of an optical medium. In this study, the Abbe number in a transparent organic thin film was measured through a simple double-slit experiment, and the results agreed with that calculated from a known dispersion formula for this medium. Unlike conventional methods that calculate the Abbe number from the refractive indices measured at three specific wavelengths using dedicated equipment, the method proposed in this study is a very simple experiment to obtain the Abbe number of new optical media without measuring the refractive indices. We demonstrated that experiments at the undergraduate optics level can be utilized to measure the chromatic dispersion of optical media.

아베 수는 투명한 광학 매질의 색분산을 대표하는 값이며 광학 매질의 다색광 혹은 백색광 응용을 위해 측정이 필수적이다. 본 연구에서는 간단한 이중 슬릿 실험을 통하여 투명한 유기물 박막의 아베 수를 측정하였으며, 이 매질에 대해 알려진 분산식으로 아베 수와 일치하는 결과를 얻었다. 굴절률 측정 전용 장비를 사용하여 세 개의 특정 파장에서 굴절률을 측정하여 아베 수를 계산하는 기존의 방식과 달리, 본 연구에서 제안한 방법은 굴절률을 측정하지 않고 매우 간단한 실험으로 새로운 광학 매질의 아베 수를 구하는 방법으로, 학부 광학 수준의 실험이 광학 매질의 색분산을 가늠하는 데 활용될 수 있음을 보였다.

Keywords

Acknowledgement

레이저 파장의 정밀 측정을 위해 분광분석기(LSA; HighFinesse)를 빌려주신 문한섭 교수님께 감사드린다.

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