Refractometer readout system

Details Refractometer readout system Refractometer readout system

1990-01-24

1991-04-09

Evans, F. L.

Optics: measuring and testing

Refraction testing

Prism engaging specimen

356128, G01N 2141

Patent

active

050059726

ABSTRACT:
A scale for use in critical angle hand refractometers of conventional design permitting direct numerical readout of every scale division.

REFERENCES:
patent: 253639 (1926-06-01), Wilson
patent: 2633053 (1953-03-01), Hansen
patent: 2729137 (1956-01-01), Forrest
patent: 3279309 (1966-10-01), Goldberg

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