REFRACTIVE INDEX MEASUREMENT TECHNIQUE FOR CONDENSED MEDIA Russian patent published in 1995 - IPC

FIELD: measurement technology. SUBSTANCE: position of two color-contrast boundaries appearing both in reflection from analyzed medium and from boundary of two parts of prism with refractive index n₁ and n₂ is recorded simultaneously; here, n_anal<n₂<n₁, where n_anal is refractive index of analyzed medium; two parts of prism are joined so that their boundary makes obtuse angle relative to base plane of first prism and refractive index of analyzed medium n_anal is found from equation n_anal= n₁·sin(arcSin n₂/n₁+γ), where γ is difference in angular position of color-contrast boundaries. EFFECT: facilitated procedure. 3 dwg, 1 tbl