END STANDARD LENGTH METER Russian patent published in 2003 - IPC

FIELD: measurement facilities. SUBSTANCE: invention relates to devices for measuring length of parallel slip gauges. Proposed device contains end standard lapped to flat glass plate installed on stage, optical unit made in form of "null-indicator" - laser optically coupled with flat glass plate or end standard, cylindrical lens and position sensitive photocell and readout device - laser displacement meter whose reflector is coupled with stage and is installed on line of measurement. Stage is made movable in two relatively square directions. EFFECT: increased capacity at measurements. 3 cl, 1 dwg