optigraph Meaning, Definition & Usage

Op"ti*graph noun

Etymology

Optic + -graph: cf. F. opticographe. See Optic, a.

Definitions

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 a pencil at the eye end which leaves the delineation on paper.