Epidark illumination system

Details Epidark illumination system Epidark illumination system

1977-09-22

1980-02-05

Henry, Jon W.

G02B 2110

Patent

active

041869931

ABSTRACT:
An epidark illumination system for use with a microscope in which a sample is illuminated from around an objective by a ring-shaped light flux having its center coincident with the optic axis of the objective to enable the sample to be observed in a dark field of view comprises a ring-shaped condenser lens member disposed adjacent to the forward end of the objective with the center of the lens member being coincident with the optic axis of the objective to condense the light flux upon the sample, and a scattering member for scattering the ring-shaped light flux disposed in the light path before the ring-shaped light flux reaches the ring-shaped condenser lens member.

REFERENCES:
patent: 1627892 (1927-05-01), Frederick
patent: 2809554 (1957-10-01), Bernhardt

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