Device for selectively available phase-contrast and relief obser

Details Device for selectively available phase-contrast and relief obser Device for selectively available phase-contrast and relief obser

1981-07-07

1983-10-04

Corbin, John K.

350525, 350526, G02B 2114

Patent

active

044075693

ABSTRACT:
The invention contemplates a microscope construction, applicable both to reflected-light and to transmitted-light varieties, whereby an object under examination can be selectively observed for phase-contrast and for relief effect (so-called "contrast modulation"). A first diaphragm having the effective shape of a circular ring is selectively positionable concentric with the observation-ray path and at a first location conjugate to the image plane of the microscope objective; and at least two diaphragms are selectively positionable on the illumination-ray path at a second location conjugate to the image plane of the microscope objective. One of these latter two diaphragms is in the effective circular-ring shape of the observation-path diaphragm, and the other of these latter two diaphragms is a light-transmitting circular-ring segment.

REFERENCES:
patent: 2565419 (1951-08-01), Aitcheson
patent: 2766655 (1956-10-01), Pinkowski
patent: 3637280 (1972-01-01), Beyer et al.

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