Motorised lens positioning appts. for microscope - changes between dark-field illumination and differential interference contrast and stress positions using computer system

摘要

A number of optical viewing objectives (15) brings via manual rotation various lenses into a viewing line (G). A motor (4) brings a Wollaston Prism into the same viewing line. Another motor (2) moves the changeover frame (1) up or down to bring one of the optical elements (11, 12, 13) into viewing line (G). Through a microprocessor controlled steering system (14) which has or may have its own observational feedback unit (8). Commands for viewing type desired are given which the steering system executes to bring the necessary optical ingredients into viewing line (G). Also, the Wollaston prism will move along the viewing line to its correct viewing focus in that a tension spring (9) draws the slide (7) towards a stop plate on the transfer element (6) which turns following tension spring (10) when the changeover unit (1) is moved. ADVANTAGE - Cumbersome re-adjustments are avoided when microscope viewing is to change method from dark-field illumination to differential interference contrasting. Required re-positioning of essential optical elements are computer-stored, with or without processors being associated with their own feedback sensors.