Vertical illuminator for microscope

Details Vertical illuminator for microscope Vertical illuminator for microscope

1982-07-08

1984-12-11

Henry, Jon W.

350526, 350528, 350318, G02B 2110, G02B 2112

Patent

active

044874863

ABSTRACT:
A vertical illuminator for microscope permits a choice between a vertical bright and a vertical dark field illumination. The illuminator includes a light diminishing member or a light shield member which is operated in response to an illumination switching operation. The light diminishing member may be moved out of an illumination light path or the light shield member may be temporarily advanced into the illumination light path, as desired, thereby decreasing a difference in the brightness of the field of view as the illumination is switched. In this manner, the observation is facilitated and the likelihood of damaging the eyes of a viewer is eliminated.

REFERENCES:
patent: 1157257 (1915-10-01), Siedentopf
patent: 2103230 (1937-12-01), Benford et al.
patent: 2766655 (1956-10-01), Pinkowski
patent: 4329014 (1982-05-01), Reinheimer et al.
patent: 4368947 (1983-11-01), Yoshinaga et al.

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