| 释义 |
Luckiesh-Moss visibility meter Luckiesh-Moss visibility meter[lü′kēsh ′mȯs ‚viz·ə′bil·əd·ē ‚mēd·ər] (engineering) A type of photometer that consists of two variable-density filters (one for each eye) that are adjusted so that an object seen through them is just barely discernible; the reduction in visibility produced by the filters is read on a scale of relative visibility related to a standard task. |