【摘要】 光学低通滤波器(optical low pass filter,简称OLPF)利用石英双折射晶体的分光性质来实现低通滤波。对数码相机中的OLPF的频谱特性、色散特性及宽角度入射时的特性进行理论分析、研究和模拟。结果表明:通过改变多块双折射晶体叠加排列的位置,可以改善OLPF的频谱特性;一般的OLPF可以用于宽光谱以及宽角度入射情况。更多还原

【Abstract】 Birefringent quartz crystals′ light splitting characteristic is used in optical low pass filter(OLPF).The characteristics of frequency response,dispersion and broad-angle-incident of the OLPF are analyzed and simulated in theory.The results indicate that the frequency response characteristic of the OLPF can be improved by proper alignment of the birefringent crystals.Regular OLPF can meet the requirements of wide spectral range and broad-angle-incident optical system.更多还原