Rudolph Research Contact Lens Refractometers The Contact Lens Refractometers are designed for measurement of contact lenses both hard and soft as well as accurately checking saline solutions. The J457CLR offers: Reproducible pressure measurement Soft contact lenses will change refractive index if solution is pressed out of the matrix. By using a light, but repeatable, amount […]

Refractometry Definition – Measuring Refractive Index Refractive Index Measurement or Refractometry is the method of measuring substances refractive index and assess their composition or purity. Refractometry is a technique that measures how light is refracted when it passes through a given substance. Snell’s Law which is also known as The Law of Refraction describes the […]

Refractometer Sample Cover Options for Rudolph J157 Models and Above Rudolph Research Analytical sample cover pioneered dual temperature control for automatic refractometers and still remains a market leader in this all-important technology. Refractive Index varies with temperature. However, this variation depends on the sample but for a refractometer to give an accuracy of 0.0001 the […]