地球以外的

344-359) describes a micrometer in which a negative lens is introduced between the eye-piece and the objectglass.

象测微表与分开的透镜。各种各样的测微表被发明了除heliometer 以外为测量由象。Ramsdens 屈光的测微表包括个分开的透镜被安置在台地球望远镜的架设的眼睛管的最内在的透镜的共轭焦点。