Epidark illumination device

Details Epidark illumination device Epidark illumination device

1984-10-22

1987-04-21

Punter, William H.

350321, 350600, G02B 2110, G02B 510

Patent

active

046591931

ABSTRACT:
An epidark illumination device comprising an optical means whereby a light from a light source is rightly reflected within an entrance plane including an optical axis but is diffused within a plane vertical to the entering plane, a light interrupting plate preventing the light from the light source from directly entering an objective and an iris diaphragm provided near an object to be inspected so as to make a uniform epidark illumination possible and to prevent a stray light from entering an observing optical system.

REFERENCES:
patent: 2415732 (1947-02-01), Domingo
patent: 2809554 (1957-10-01), Bernhardt
patent: 4351584 (1982-09-01), Chandesais
Hooff, et al., "Description of a Dark-Field Illuminator Cone for Dissecting Microscope", Microscopica Acta., vol. 85, #1, 9-1981, pp. 17-18.

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