影像感測器雜訊對哈特曼光點質心計算影響

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题名:	影像感測器雜訊對哈特曼光點質心計算影響
作者:	蕭雅云;Hsiao, Ya-Yun
贡献者:	光電科學與工程學系
关键词:	影像感測器
日期:	2024-08-08
上传时间:	2024-10-09 15:41:26 (UTC+8)
出版者:	國立中央大學
摘要:	隨著科技進步，光學檢測技術不斷優化，逐漸提升精確度及準確度，而自適應光學技術的發展，使波前檢測器在光學系統中的應用更廣泛，有效提高系統的性能和穩定性，是一項關鍵的技術，與干涉儀同為重要的光學檢測工具。波前檢測器的雜訊會降低質心計算的重複性，進而影響最終量測結果的精確性。本論文將探討雜訊對波前檢測器質心計算的準確度，評估不同尺寸的光點對質心位置重複性的影響，透過模擬感測器偵測之光點，並加入隨機雜訊進行質心運算，欲求出最佳計算結果之光點大小，以設計出符合此光點大小之波前檢測器架構；使用波長較短的藍光雷射實際量測，計算質心位置重複性，並調整微透鏡陣列與偵測器的間距以改變光點尺寸，比較不同光源下的實驗結果和模擬結果，進而優化波前檢測器之性能。 ;With the advancement of technology, optical detection techniques are continuously optimized, gradually enhancing accuracy and precision. The development of adaptive optics technology has broadened the applications of wavefront sensors in optical systems, effectively improving system performance and stability. Noise in wavefront sensors can reduce the repeatability of centroid calculations, thereby affecting the accuracy of the final measurement results. This paper will investigate the impact of noise on the accuracy of centroid calculation in Shack-Hartmann wavefront detectors. It aims to assess the influence of different sizes of the spot on the repeatability of centroid positions. Through simulations of detected spots with added random noise for centroid computation, it seeks to determine the optimal size of the spot for achieving the most accurate calculation results, thus designing a wavefront detector architecture tailored to this spot size. Actual measurements will be conducted using a shorter wavelength blue laser to calculate centroid position repeatability. Adjustments to the spacing between microlens arrays and detectors will be made to alter the size of the spot. Finally, experimental results under different light sources will be compared with simulation results to optimize the performance of the wavefront detector.
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