An optical correlator is disclosed that, in combination with an ultrafast optical pulsed source,
can be used for estimating the differential position of remote objects with submicron …

An optical correlator is disclosed which, in combination with an ultrafast optical pulsed
source, can be used for estimating distances of objects with submicron precision. The …

Absolute distance measurements (obtained from time of? ight data or chirp data) are
combined with accurate relative Doppler measurement data to yield distance information …

The invention, relates to an optical rangefinding device which consists of two frequency-
stabilized multi-mode lasers. Two modes of each laser are superimposed so that each laser …

There is disclosed a range finder operating on the principle of finding the range of an object
by measur ing the time between transmission of a pulse towards an object and the reception …

BACKGROUND OF THE INVENTION The present invention relates to an apparatus for
digital short-interval ranging, particularly for determining distances by the reflection of …

57 ABSTRACT A method and an apparatus for a precision optical distance measuring
device which can be used to determine both external and internal target geometries. The …

A ranging and velocity measuring system in which a laser beam is periodically deflected
through an angular scan by a reference periodic wave and energy reflected from an object is …

Apparatus and method for measuring distance in which a coarse measurement of the
distance is made by detecting the time of travel of a pulse and a'precise measurement is …

An apparatus is provided for use in determining the distance and velocity of a distant object.
The apparatus employs a low energy optical radiation source that emits identical external …