Yabe博士的诀窍是使用比较小的菲涅尔透镜——棱镜同心环构成的透明较薄的平面透镜。
Dr Yabe's trick is to use relatively small Fresnel lenses-transparent and relatively thin planar lenses made up of concentric rings of prisms.
胶片的曲率是和弯月透镜后面的反射镜同心的。
The curvature of the film is concentric with the mirror behind the meniscus.
波导须安装-第一个声学透镜系统都安装在双同心。
Waveguide to be fitted-the first acoustic lens system ever fitted to a Dual Concentric.
波导须安装-第一个声学透镜系统都安装在双同心。
Waveguide to be fitted-the first acoustic lens system ever fitted to a Dual Concentric.
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