Refractometer for distinguishing sugar-sweetened beverages from

Details Refractometer for distinguishing sugar-sweetened beverages from Refractometer for distinguishing sugar-sweetened beverages from

1997-12-04

1999-01-12

Font, Frank G.

Optics: measuring and testing

Refraction testing

356135, G01N 2141

Patent

active

058596968

ABSTRACT:
A low-cost refractometer for determining whether or not a beverage has been sweetened with sugar. The refractometer has an elongated transparent body with a prism at one end and either an eye piece or a light source at the other end. A drop of the beverage to be tested is put on the face of the prism and a diffuser is closed over it to spread the liquid into a thin sheet and to diffuse the light entering the prism face. The user looks through the eye piece at the remote end and because of a light block, light only shows through at the eye piece if there is sugar in the drink. Alternatively, a light may be directed at the eye piece end and if light is visible through the diffuser, the sample has sugar and if there is no light showing at the diffuser, the sample is essentially sugar-free.

REFERENCES:
patent: 4650323 (1987-03-01), Nakagawa
patent: 4890916 (1990-01-01), Rainer
patent: 5355211 (1994-10-01), Thompson et al.

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