optigraph

词形变化

optigraphs 复数 optigraphs

释义与例句

n.
  1. 1.

    A telescope with a diagonal eyepiece, suspended vertically in gimbals by the object end beneath a fixed diagonal plane mirror. It is used for delineating landscapes by means of an attached pencil.

词源

Compare French opticographe.

来源：wiktionary