Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Evaluation of optical properties for the development of high resolution ophthalmic endoscope

고 분해능 안구내시경 개발을 위한 광학적 특성 평가

  • Lee Bongsoo (School of Biomedical Engineering, College of Medicine, Konkuk University) ;
  • Cho Dong Hyun (School of Biomedical Engineering, College of Medicine, Konkuk University) ;
  • Kim Sin (Department of Nuclear and Energy Engineering, College of Engineering, Cheju National University) ;
  • Cho Hyosung (Department of Radiation Science, Institute of Health Science, Yonsei University)
  • 이봉수 (건국대학교 의과대학 의학공학부) ;
  • 조동현 (건국대학교 의과대학 의학공학부) ;
  • 김신 (제주대학교 공과대학 에너지공학과) ;
  • 조효성 (연세대학교 보건대학 방사선학과)
  • Published : 2004.10.01
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Abstract

An ophthalmic endoscope which is used in medical applications should have the total diameter less than 1 mm. Its image resolution is limited to 30∼40 lp/mm. Therefore, the image resolution is one of the most important factors to decide image quality of the ophthalmic endoscopic images. This study obtained high resolution and magnifying ophthalmic endoscopic images by a new optical design using a 0.23 pitch GRIN lens and high resolution fiber-optic image guide which has less than 5 ${\mu}{\textrm}{m}$ diameter microfibers. The resolutions of images from existing and from a new type of ophthalmic endoscope are measured and compared using a USAF resolution target.

현재 임상적으로 사용되고 있는 안구내시경은 전체 직경이 1 mm 이하로 제한되어 있고, 그 영상분해능 역시 30∼40 lp/mm로 제약되기 때문에 안구내시경 영상의 질을 판단하는데 있어서 가장 중요한 요소는 영상 분해능이라고 할 수 있다. 본 연구에서는 0.23pitch GRIN 렌즈와 5 $\mu\textrm{m}$ 이하의 마이크로 광섬유를 포함하는 미세 영상가이드를 이용한 새로운 광학적 설계로 고 분해능 안구내시경의 확대 영상을 획득하였고, USAF 분해능 target을 이용하여 기존 안구내시경 영상의 분해능과 비교, 분석하였다.

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References

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