with monocular observation at a single point, e.g. coincidence type

Full Title

Measuring distances in line of sight; Optical rangefinders > using a parallactic triangle with variable angles and a base of fixed length in the observation station, e.g. in the instrument > with monocular observation at a single point, e.g. coincidence type

Classification Context

Section:

PHYSICS

Class:

MEASURING; TESTING

Subclass:

MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY