Immersion refractometer with angle prism

Details Immersion refractometer with angle prism Immersion refractometer with angle prism

1984-09-07

1987-02-10

Rosenberger, R. A.

Optics: measuring and testing

Refraction testing

Prism engaging specimen

356128, 356133, G01N 2141

Patent

active

046419659

ABSTRACT:
A refractometer comprises a light source, an angle prism and an optical system in a casing so mounted that the optical system focuses an image of a diaphragm at said light source upon a double photodiode located beyond the prism and supported by an oblique surface of the casing. The ratio of the output of one photodiode to the output of the double photodiode is measured to register the index of refraction.

REFERENCES:
patent: 3426211 (1969-02-01), Anderson
patent: 3674373 (1970-02-01), Waters et al.

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