In one embodiment, the dichroic filter 206 is located between the meniscus lens 202 and the dome lens 204.

在一个实施例中，二向色滤光片206位于弯月透镜202与半圆状透镜204之间。

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The first stage of optical concentrator 200 is a meniscus lens 202 and the second stage is a dome lens 204, to which is mounted the wavelength converting element 110.

光学集中器200的第一级是弯月透镜202且第二级是半圆状透镜204，波长转换元件110安装到该半圆状透镜204上。

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"While I was cleaning the lens from raindrops a first lightning bolt hit the dome and I could not help but watch, " he says.

BBC: Lightning really does strike twice