RANGE FINDER'S OPTICAL SYSTEM Russian patent published in 2008 - IPC G01C3/08 

FIELD: optical engineering.

SUBSTANCE: range finder's optical system has radiation source, radiation forming system and receiving unit which has mirror made in form of negative menisci lens, onto which second surface of that lens there is mirror coating applied in form of rings. Receiving unit also has separating unit and two radiation receivers disposed at both sides of separating unit. Radiation source is made in form of system of two lasers operating at different wavelengths, and unit for converging light channels of mentioned lasers. Radiation forming system is made in form of afocal telescopic system. Radiation forming system is provided with additional lens mounted in light channel of one laser. Receiving unit is provided with additional mirror mounted onto optical axis in front of first surface of negative menisci lens. Separating unit, made in form mirror provided with diaphragm, and radiation receivers are disposed behind second surface of negative menisci lens.

EFFECT: provision of independent operation of two channels at different wavelengths simultaneously or alternately.

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