corneal lens lens

high-speed rotating drum and rotating mirror camer

corneal lens（lenses） lens

Lens-to-lens interval

object lens objective lens

objective lens object lens

plane-concave lens (=plano-concave lens)

plane-convex lens (=plano lens)

short focal length lens (=short-focus lens)

variable focus lens vari-focus lens

vari-focus lens variable focus lens

40inches rotating blad e

45 rotating scan mirror

45 rotating scanning mirror

6-face Rotating Drum

A rotating and a stationary disc

AC exciter with armature rotating

AC rotating machine

active rotating degree