Viewer for biological diffusion plate

Details Viewer for biological diffusion plate Viewer for biological diffusion plate

1975-09-19

1978-07-11

McGraw, Vincent P.

Optics: measuring and testing

Refraction testing

Prism engaging specimen

1951035R, 350 10, 350238, 356157, 356244, G01B 1102, G01N 2116

Patent

active

040998819

ABSTRACT:
A viewer for observing and measuring the diameter of diffusion rings occurring on immuno-diffusion plates employs a magnifying lens for observing the plate and a baffled back lighting system for illuminating the plate so that light diffused by the plate is visible through the lens against a dark field. A beam splitter supported between the lens and the plate superimposes an image of a pair of illuminated filaments on the image of the plate seen through the lens. Manual mechanism allows the spacing of the filaments to be adjusted by the observer to bring them to the diameter of a diffusion ring. A digital display connected to the adjustment system provides a read-out of the filament spacing and thus the diameter of the immuno-diffusion ring.

REFERENCES:
patent: 2241690 (1941-05-01), Williams
patent: 2577069 (1951-12-01), Brewer
patent: 3546778 (1970-12-01), Lepkowski
patent: 3652169 (1972-03-01), Danti et al.
patent: 3712746 (1973-01-01), Bergeron

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