Specialized Optical Coupling (index matching) Liquids that closely match the refractive index of common materials (Fused Silica, BK 7 and Water) at given wavelengths. Please contact our technical department for optical coupling of additional materials.

Cargille’s fused silica matching liquids precisely match the refractive index of fused silica at the HeNe wavelength (632.8 nm) and also very closely match the dispersion of fused silica. Other custom formulations will match the refractive index of fused silica at other wavelengths.

Fused Silica Matching Liquid Applications: In development as well as in field applications, Cargille’s fused silica matching immersion liquids will be very useful to those working with fused silica optical fibers, preforms, windows, and other optical components.

Cargille’s fused silica matching liquids are colorless, odorless and non-toxic. They are soluble in naphtha, ethyl ether, xylene, and methylene chloride; partly soluble in acetone; and insoluble in water and ethanol. The liquids have a known incompatibility with Latex rubber.