CONVERGENCE MECHANISM FOR BINOCULAR REFRACTING INSTRUMENT

摘要

?-3351 CONVERGENCE MECHANISM FOR HS/mf BINOCULAR REFRACTING INSTRUMENT -27-79 A mechanism which has a continuously variable amount of convergence and inward movement over the entire range of pupillary distance (PD) settings is disclosed. The repositioning of a pair of straight tracks transfers a continuously variable amount of motion to a pair of respective levers that control the position of a pair of carriages relative to the PD control and the angular relationship of lens batteries relative to the respective carriages.