K-GFK68(M)(SUMITA) Refractive Index

Optical constants (n, k) of K-GFK68(M)(SUMITA), covering 0.36 – 1.55 μm wavelength range.

Range 0.360 – 1.550 μm
Data Points 101

Optical Constants at Key Wavelengths

632.8 nm (He-Ne)
n = 1.5881
k = 0.0000
589.3 nm (Na-D)
n = 1.5900
k = 0.0000
532 nm
n = 1.5932
k = 0.0000
1550 nm (Telecom)
n = 1.5758
k = 0.0000

n, k Dispersion Curves

Data Table (Sampled)

Wavelength (μm)nk
0.36001.612280.00000
0.38381.607840.00000
0.40761.604220.00000
0.43141.601220.00000
0.45521.598710.00000
0.47901.596580.00000
0.50281.594760.00000
0.52661.593180.00000
0.55041.591800.00000
0.57421.590600.00000
0.59801.589530.00000
0.62181.588580.00000
0.64561.587720.00000
0.66941.586960.00000
0.69321.586260.00000
0.71701.585630.00000
0.74081.585050.00000
0.76461.584510.00000
0.78841.584020.00000
0.81221.583560.00000
0.83601.583140.00000
0.85981.582740.00000
0.88361.582370.00000
0.90741.582010.00000
0.93121.581680.00000
0.95501.581360.00000
0.97881.581060.00000
1.00261.580770.00000
1.02641.580490.00000
1.05021.580230.00000
1.07401.579970.00000
1.09781.579720.00000
1.12161.579480.00000
1.14541.579250.00000
1.16921.579020.00000
1.19301.578800.00000
1.21681.578580.00000
1.24061.578360.00000
1.26441.578150.00000
1.28821.577950.00000
1.31201.577740.00000
1.33581.577540.00000
1.35961.577340.00000
1.38341.577140.00000
1.40721.576950.00000
1.43101.576760.00000
1.45481.576560.00000
1.47861.576370.00000
1.50241.576180.00000
1.52621.575990.00000
1.55001.575800.00000

Sampled data (101 points total). Click "Download Full CSV" for complete data.

References

SUMITA Zemax catalog 2017-02-02 (obtained from http://www.sumita-opt.co.jp)
See also SUMITA optical glass data book

Related Materials (Specs)

4786 (NIKON i-line glass) 5165 (NIKON i-line glass) 5742 (NIKON i-line glass) 5859 (NIKON i-line glass) 7054 (NIKON i-line glass) acrylic double matching liquid

Need to measure K-GFK68(M)(SUMITA) thin film thickness?

Acuitik film thickness measurement systems offer sub-nanometer non-contact precision.

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