refractometer (redirected from Refractormeter)

refractometer /re·frac·tom·e·ter/ (re″frak-tom´ĕ-ter)

1. an instrument for measuring the refractive power of the eye.

2. an instrument for determining the indexes of refraction of various substances, particularly for determining the strength of lenses for spectacles.

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re·frac·tom·e·ter (rfrk-tm-tr)

n.

Any of several instruments used to measure the refractive index of a substance.

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refractometer

[rē′frəktom′ətər]

Etymology: L, refringere, to break apart; Gk, metron, measure

an instrument for measuring the refractive index of a substance, used primarily for measuring the refractivity of solutions. See also refractive index.

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refractometer

1. an instrument for measuring the refractive power of the eye.

2. an instrument for determining the indexes of refraction of various substances.

3. an instrument for measuring the concentration of solutes, e.g. protein in solutions, immunoglobulins in serum.

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refractometer 

1. An instrument for measuring the refractive index of transparent objects. There exist several types: Abbé's refrac-tometer, which is based on the measurement of the critical angle at the interface between a sample and a prism of known index of refraction and uses white light whereas that of Pulfrich, which is based on the same principle as Abbé's, uses monochromatic light. As the refractive index of some materials is related to their water content, the handheld Atago CL-1 Soft lens Refractometer has been calibrated to provide a reading of the percentage of water content of soft contact lenses.

2. See optometer.