Protector for inverse microscope, preventing contamination of element below specimen, comprises elastic casing extending from front lens holder to objective mounting

摘要

The objective mounting (7) is surrounded by a casing (6). This extends from the front lens holder (5) back to the objective mounting cover (3). It comprises a radially- and axially-resilient material, which seals off the objective mounting. There is a collar (8, 9) at each end of the casing. At the front, this makes a tight, interlocking seal with the lens holder. At the rear it effects sealing between the casing and the edge of the objective mounting cover.