光学
材料科学
光谱学
可见光谱
折射率
滤波器(信号处理)
物理
计算机科学
量子力学
计算机视觉
作者
Pratyasha Sahani,Shiori Nabana,Taiyu Okatani,Naoki Inomata,Yoshiaki Kanamori
出处
期刊:Applied Optics
[The Optical Society]
日期:2024-04-08
卷期号:63 (13): 3537-3537
被引量:1
摘要
A miniature low-cost pixelated gradient thickness optical filter is proposed to achieve spectroscopy in the visible wavelength range. The optical filter consists of a two-dimensional array of metal-dielectric-metal thin films arranged in Fabry–Pérot filter configurations with discretely varying cavity thicknesses. The wavelength-selective characterization of each filter is performed by measuring the transmittance over the visible wavelength range. The pixelated gradient thickness filter is equipped with a CMOS image sensor, and its performance as a spectroscopic module is evaluated by illuminating different monochromatic wavelengths on it. The target spectra are successfully reconstructed from the output signals recorded in the sensor from the respective pixelated gradient thickness filters. The technological competence of the proposed filter will enable its use in handheld devices to widen its application range in day-to-day life.
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