부산대학교 도서관

This paper introduces a novel sensor for detecting transparent foreign objects in the human eye. The sensor is a microwave open-ended circular waveguide that excites the dominant modes TE 11 , T M 01 within a probe. By covering the eye with the opening aperture, the sensor can detect changes in the reflection parameters caused by the presence of foreign optical transparent objects in the eye. The proposed sensor is capable of detecting cylindrical-shaped foreign bodies as small as 2 mm in length and located 1 cm deep within the eye. The sensor was validated through ex-vivo measurements on a cadaveric pig eye using a WR90 rectangular waveguide at the x-band. A small piece of glass with dimensions less than 5 mm was inserted at a depth of 1 cm, and the sensor was able to detect it successfully.