holophote 的定义
- an apparatus by which practically all the light from a lighthouse lamp or the like is thrown in a desired direction.
更多holophote例句
- A fixed holophote is placed inside the optic in the dark or landward arc, and at the focal plane of the lamp.
- The focus observer is shown on the lamp in holophote, Fig. 172.
- The catadioptric lens, or holophote, gives a far more powerful but a more concentrated beam than the parabolic reflector.