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Measurement of refractive indices of solid and liquid
 
 

Measurement of refractive indices of solid

1-1  For bulk shaped materials
Chart1 : Examples of measurements and the methods
Material characteristicsMeasuring materialsMeasuring method
Isotropic materialsOptical glass, Silica glass, etc.Refractometer (V-Block method)
or
Spectrometer (Minimum deviation method)
Crystals of cubic system(CaF2,Si,ZnS,ZnSe,etc)
Plastics (without birefringence)Refractometer (V-Block Method)
Porous Glasses (n1.03)Spectrometer (Minimum deviation method)
Anisotropy materialsUniaxial crystals(Quartz,TiO2,Sapphire,LBO,etc)Spectrometer (Minimum deviation method)
Refractometer (V-Block method)
Please refer Chart 2 for spectral lines measurable and the accuracy of the measurements.

Chart2 : Spectral lines measurable and the accuracy
Spectral linesMeasuring Equipment
MÖLLERWEDEL Carl Zeiss
Jena
Wavelength Symbols Symbols
of lamps
(Light
source)
Super
Precision
Spectro
meter
Type1
Precision
Spectro
meter
Type 2
Refracto
meter
Type
PR-2
Ultra precisionPrecisionStandardStandard
in air
(nm)
in
vacuum
(nm)
Measuring
Accuracy
(10-6)
Measuring
Accuracy
(10-5)
Measuring
Accuracy
(10-5)
Measuring
Accuracy
(10-5)
2325.422326.05 Hg±5±3××
1970.091970.63 Hg±5±3××
1529.581530.00 Hg±5±3××
1128.641128.95 Hg±5±3××
1013.981014.26tHg±2±1±3±5
852.110852.344sCs±2±1±3±5
780.023780.237 Rb±2±1±3±5
706.519706.714rHe±2±1±3±5
656.273656.454CH2 ±2±1±3±3
643.847644.025C'Cd ±2±1±3±3
632.82632.99 He-
Ne
±2±1±3±3
587.562587.725dHe ±2±1±3±3
546.075546.227eHg ±2±1±3±3
486.133486.269FH2 ±2±1±3±3
479.992480.126F'Cd ±2±1±3±3
435.835435.957gHg ±2±1±3±3
404.656404.770hHg ±2±1±3±5
365.015365.119iHg ±2±1±3×
334.148334.244 Hg±5±1××
289.360289.444 Hg ±5±1××
253.652253.728 Hg ±5±1××
228.802228.872 Cd ±5±1××
214.438214.506 Cd ±5±1××
206.200206.266 Zn ±5±1××
-194.227 Hg±5±3××
-184.950 Hg±5±3××

 

Measurement of refractive indices of liquid

Chart3 : Examples of measurements and the methods
Condition of test materialExample of measurementMeasuring method
Liquid like Oil, Alcohol, Water, etc. Refractometer
(V-Block method)
Greasy Greasy oil
Wavelengths used for the measurements:t,s,780nm,r, C, C', 633nm, d, e, F, F', & g
Measuring accuracy:±1×10-4

 
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