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Limiting the number of quantisation levels of a harmonic lens as a method for improving the quality of the generated image
Quantum Electronics ( IF 0.9 ) Pub Date : 2020-07-09 , DOI: 10.1070/qel17296
R.V. Skidanov 1, 2 , S.V. Ganchevskaya 1, 2 , V.S. Vasil’ev 1, 2 , N.L. Kazanskiy 1, 2
Affiliation  

The characteristics (modulation transfer functions) of harmonic lenses made by direct laser patterning of resist are experimentally studied. The influence of technological errors in the manufacture of lenses on the formation of the point spread function is modelled for harmonic lenses with 32 and 256 quantisation levels. Direct laser writing is used to produce lenses with these numbers of levels. It is experimentally shown that the modulation transfer function of the harmonic lens with 32 quantisation levels is significantly greater at high spatial frequencies (50 mm -1 ).

中文翻译:

限制谐波透镜的量化级别数,作为提高生成图像质量的方法

实验研究了通过对抗蚀剂进行直接激光图案化制成的谐波透镜的特性(调制传递函数)。对于具有32和256量化级别的谐波透镜,对透镜制造中的技术错误对点扩散函数形成的影响进行了建模。直接激光写入用于生产具有这些数量级的透镜。实验表明,在高空间频率(50 mm -1)下,具有32个量化级别的谐波透镜的调制传递函数明显更大。
更新日期:2020-07-10
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