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“Lower NAs are best when a large depth of focus is important or when you need nearly circular beams.
High numerical aperture lenses are important when you need to focus light down to a small spot size or when you need the maximum light capture from a diode laser.”
我要设计球面透镜来耦合二极管,然后泵浦激光晶体。
我需要焦深长一点,就需要“lower NA"的透镜。但是,同时我又需要焦点小一点,我就需要”High NA"的透镜。要同时满足这两个要求,我该如何折中呢?NA在0.5左右,好不好呢?
请高手不吝赐教。 |
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