Optigraph

Definition of Optigraph

Op´ti`graph
n.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.
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Optic axis of a crystal
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-Optigraph-
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Optometer
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