Presentation Information

2:15 PM - 2:30 PM JST(5:15 AM - 5:30 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[10p-A33-2]Speckle Noise Reduction by Structured Light using 2D single-shot OCT

〇Kanta Sato¹, Keito Fukuda¹, Shuto Onodera¹, Tatsutoshi Shioda¹ (1.Saitama Univ.)

Keywords:

Optical Coherence Tomography,Speckle

In 2D single-shot OCT, which is effective for the high-precision in-line inspection of micro-hole structures, speckle noise that hinders image discrimination remains a challenge. In this study, we introduced a cylindrical lens array as a structured light mechanism to reduce this noise. We measured a rough surface under varying element pitches and numerical apertures (NA) and evaluated the coefficient of variation (CV). The results revealed that the CV is proportional to the square of the NA (NA²), and that a smaller NA leads to a higher noise reduction rate. Through these findings, optimal optical design guidelines were obtained.

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