Optical constants

Refractive index of N-SK5 (SCHOTT)

N-SK5: n,k 0.3–2.5 µm

Data
formula 2 + tabulated k
Range
0.3–2.5 µm
Temperature
293 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.3–2.5 µm
Refractive index n
1.58913
Extinction coefficient k
1.01298e-08
Permittivity ε1
2.52533
Permittivity ε2
3.21951e-08
Absorption coefficient α
0.00216635 cm⁻¹
Penetration depth δ = λ/(2πk)
9.23212e+09 nm
Abbe number Vd
61.267
Chromatic dispersion dn/dλ
-0.0497565 µm⁻¹
Group index ng
1.61837
Group velocity dispersion
85.9482 fs²/mm
Dispersion parameter D
-468.893 ps/(nm·km)
Photon energy
2.11001 eV

ε = (n + ik)², α = 4πk/λ, ng = n − λ dn/dλ, GVD = λ³/(2πc²) d²n/dλ², D = −(λ/c) d²n/dλ². Group-velocity dispersion is given for formula data only.

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith
import lightsmith as ls

# N-SK5 (SCHOTT): N-SK5
schott_n_sk5 = ls.fetch_refractiveindex("specs", "SCHOTT-optical", "N-SK5", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(schott_n_sk5.range_nm)  # (300, 2500) nm
eps = schott_n_sk5.eps([633])  # complex permittivity

Downloads the original record once (pinned to the imported snapshot) and caches it.

Lightsmith is open source (MIT): Mie, T-matrix, BEM, DDA, FDTD, RCWA, TMM, mode solvers and inverse design behind one spec, on CPU or GPU. GitHub.

Dispersion formula

Sellmeier (C in µm²) (formula 2), λ in µm
n2−1=0.991463823λ2λ2−0.00522730467+0.495982121λ2λ2−0.0172733646+0.987393925λ2λ2−98.3594579

Valid from 0.3 to 2.5 µm.

Coefficients as stored
CiValue
C10.0
C20.991463823
C30.00522730467
C40.495982121
C50.0172733646
C60.987393925
C798.3594579

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: 3.5e-06 1.22e-08 6.38e-11 2.46e-07 -3.34e-11 0.278
nd
1.58913
Vd
61.27
glass code
589613.330
glass status
standard
density
value: 3300
thermal expansion
value: 5.5e-06, temperature range: 243 343; value: 6.5e-06, temperature range: 293 573
dPgF
-0.0007
resistance
acid: 4.4; stain: 1.0; alkali: 2.0; climatic: 3.0; phosphate: 1.3

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = 2.04e-06 K⁻¹ at 633 nm, dn/dT = 1.71e-06 K⁻¹ at 1310 nm, dn/dT = 1.69e-06 K⁻¹ at 1550 nm

References

Cite

SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com); See also SCHOTT glass data sheets; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

Computed on 423 wavelengths, the same grid as the API and the library
N-SK5 (SCHOTT), N-SK5: n and k versus wavelength
λ (µm)nk
0.31.6326293.735700e-06
0.3015981.6319463.501754e-06
0.3032051.6312713.266562e-06
0.3048211.6306063.030117e-06
0.3064451.629952.792412e-06
0.3080781.6293032.553440e-06
0.3097191.6286652.313195e-06
0.311.6285572.272100e-06
0.3113691.6280352.143593e-06
0.3130281.6274151.987912e-06
0.3146961.6268021.831402e-06
0.3163731.6261981.674057e-06
0.3180591.6256021.515875e-06
0.3197531.6250131.356849e-06
0.321.6249291.333700e-06
0.3214571.6244331.255172e-06
0.323171.6238611.162858e-06
0.3248921.6232961.070053e-06
0.3266231.6227389.767526e-07
0.3283631.6221888.829555e-07
0.3301121.6216457.886587e-07
0.3318711.6211096.938595e-07
0.333641.620585.985551e-07
0.3341.6204745.791300e-07
0.3354171.6200585.474154e-07
0.3372041.6195435.074238e-07
0.3390011.6190354.672192e-07
0.3408071.6185334.268003e-07
0.3426231.6180373.861661e-07
0.3444491.6175483.453154e-07
0.3462841.6170663.042471e-07
0.3481291.6165892.629599e-07
0.3499841.6161182.214527e-07
0.351.6161142.210900e-07
0.3518491.6156542.042344e-07
0.3537231.6151951.871405e-07
0.3556081.6147421.699554e-07
0.3575031.6142951.526789e-07
0.3594071.6138541.353102e-07
0.3613221.6134171.178490e-07
0.3632481.6129871.002948e-07
0.3651.6126028.431500e-08
0.3651831.6125628.389643e-08
0.3671291.6121427.944422e-08
0.3690851.6117277.496829e-08
0.371.6115367.287400e-08
0.3710511.6113187.040385e-08
0.3730281.6109136.575851e-08
0.3750161.6105136.108842e-08
0.3770141.6101195.639344e-08
0.3790231.6097295.167345e-08
0.381.6095424.937700e-08
0.3810421.6093444.803849e-08
0.3830721.6089644.543087e-08
0.3851131.6085884.280935e-08
0.3871651.6082174.017387e-08
0.3892281.607853.752434e-08
0.391.6077153.653300e-08
0.3913021.6074883.495640e-08
0.3933871.607133.243180e-08
0.3954831.6067772.989376e-08
0.397591.6064272.734219e-08
0.3997081.6060822.477702e-08
0.41.6060352.442400e-08
0.4018381.6057412.357110e-08
0.4039791.6054042.257766e-08
0.4051.6052452.210400e-08
0.4061321.6050712.185844e-08
0.4082961.6047422.138887e-08
0.4104711.6044172.091680e-08
0.4126581.6040962.044222e-08
0.4148571.6037781.996511e-08
0.4170671.6034641.948545e-08
0.4192891.6031541.900324e-08
0.421.6030561.884900e-08
0.4215231.6028481.878341e-08
0.4237691.6025451.868669e-08
0.4260271.6022451.858946e-08
0.4282971.6019491.849171e-08
0.4305791.6016571.839344e-08
0.4328731.6013681.829465e-08
0.4351791.6010821.819533e-08
0.4361.6009811.816000e-08
0.4374981.6007991.803740e-08
0.4398291.600521.784665e-08
0.4421731.6002441.765487e-08
0.4445291.5999711.746208e-08
0.4468971.5997011.726826e-08
0.4492781.5994341.707340e-08
0.4516721.599171.687751e-08
0.4540781.5989091.668058e-08
0.4564981.5986521.648259e-08
0.458931.5983971.628355e-08
0.461.5982861.619600e-08
0.4613751.5981441.596845e-08
0.4638341.5978951.556174e-08
0.4663051.5976491.515286e-08
0.4687891.5974051.474181e-08
0.4712871.5971641.432856e-08
0.4737981.5969251.391311e-08
0.4763231.5966891.349545e-08
0.4788611.5964561.307556e-08
0.4814121.5962261.265344e-08
0.4839771.5959971.222906e-08
0.4865561.5957721.180243e-08
0.4891481.5955491.137352e-08
0.4917541.5953281.094233e-08
0.4943741.5951091.050884e-08
0.4970081.5948931.007304e-08
0.4996571.594689.634914e-09
0.51.5946529.578100e-09
0.5023191.5944689.446416e-09
0.5049951.5942599.294426e-09
0.5076861.5940529.141626e-09
0.5103911.5938488.988012e-09
0.513111.5936458.833579e-09
0.5158441.5934458.678323e-09
0.5185931.5932468.522240e-09
0.5213561.593058.365326e-09
0.5241341.5928568.207575e-09
0.5269261.5926648.048984e-09
0.5297341.5924747.889548e-09
0.5325561.5922867.729263e-09
0.5353941.5920997.568123e-09
0.5382461.5919157.406125e-09
0.5411141.5917337.243264e-09
0.5439971.5915527.079535e-09
0.5461.5914296.965800e-09
0.5468961.5913747.026083e-09
0.549811.5911977.222198e-09
0.5527391.5910227.419358e-09
0.5556841.5908487.617568e-09
0.5586451.5906777.816834e-09
0.5616211.5905078.017161e-09
0.5646141.5903398.218557e-09
0.5676221.5901728.421025e-09
0.5706461.5900088.624572e-09
0.5736871.5898448.829203e-09
0.5767431.5896839.034925e-09
0.5798161.5895239.241743e-09
0.581.5895139.254100e-09
0.5829061.5893649.588903e-09
0.5860111.5892089.946758e-09
0.5891341.5890521.030652e-08
0.5922731.5888981.066820e-08
0.5954281.5887461.103180e-08
0.5986011.5885951.139735e-08
0.601791.5884451.176484e-08
0.6049971.5882971.213429e-08
0.608221.5881511.250570e-08
0.6114611.5880051.287910e-08
0.6147191.5878611.325448e-08
0.6179941.5877191.363187e-08
0.621.5876321.386300e-08
0.6212871.5875771.382375e-08
0.6245971.5874371.372279e-08
0.6279251.5872991.362129e-08
0.6312711.5871611.351925e-08
0.6346341.5870251.341666e-08
0.6380151.586891.331353e-08
0.6414151.5867561.320985e-08
0.6448321.5866231.310561e-08
0.6482681.5864921.300082e-08
0.6517221.5863621.289548e-08
0.6551951.5862321.278957e-08
0.6586851.5861041.268309e-08
0.661.5860571.264300e-08
0.6621951.5859781.256211e-08
0.6657231.5858521.243210e-08
0.669271.5857271.230139e-08
0.6728361.5856031.216999e-08
0.6764211.5854811.203788e-08
0.6800251.5853591.190507e-08
0.6836481.5852381.177156e-08
0.6872911.5851191.163733e-08
0.6909531.5851.150239e-08
0.6946341.5848821.136672e-08
0.6983351.5847651.123034e-08
0.71.5847131.116900e-08
0.7020561.584651.116311e-08
0.7057971.5845351.115238e-08
0.7095571.5844211.114160e-08
0.7133381.5843071.113076e-08
0.7171391.5841951.111987e-08
0.720961.5840841.110892e-08
0.7248011.5839731.109790e-08
0.7286631.5838641.108683e-08
0.7325451.5837551.107570e-08
0.7364481.5836461.106452e-08
0.7403721.5835391.105327e-08
0.7443171.5834331.104196e-08
0.7482831.5833271.103059e-08
0.752271.5832221.101916e-08
0.7562781.5831171.100767e-08
0.7603071.5830141.099612e-08
0.7643581.5829111.098451e-08
0.7684311.5828091.097283e-08
0.7725251.5827071.096109e-08
0.7766411.5826071.094930e-08
0.7807791.5825061.093743e-08
0.7849391.5824071.092551e-08
0.7891211.5823081.091352e-08
0.7933261.582211.090147e-08
0.7975531.5821121.088935e-08
0.8018021.5820151.087717e-08
0.8060741.5819191.086492e-08
0.8103691.5818231.085261e-08
0.8146871.5817271.084023e-08
0.8190281.5816331.082779e-08
0.8233911.5815381.081528e-08
0.8277791.5814451.080270e-08
0.8321891.5813511.079006e-08
0.8366231.5812591.077735e-08
0.8410811.5811671.076457e-08
0.8455621.5810751.075172e-08
0.8500671.5809841.073881e-08
0.8545961.5808931.072582e-08
0.859151.5808021.071277e-08
0.8637271.5807121.069965e-08
0.8683291.5806231.068646e-08
0.8729561.5805341.067319e-08
0.8776071.5804451.065986e-08
0.8822831.5803571.064645e-08
0.8869841.5802691.063298e-08
0.891711.5801811.061943e-08
0.8964611.5800941.060581e-08
0.9012381.5800071.059212e-08
0.9060391.5799211.057835e-08
0.9108671.5798351.056452e-08
0.915721.5797491.055060e-08
0.9205991.5796631.053662e-08
0.9255041.5795781.052255e-08
0.9304351.5794931.050842e-08
0.9353931.5794091.049421e-08
0.9403771.5793241.047992e-08
0.9453871.579241.046556e-08
0.9504241.5791561.045112e-08
0.9554881.5790721.043660e-08
0.9605791.5789891.042201e-08
0.9656971.5789061.040734e-08
0.9708421.5788231.039259e-08
0.9760151.578741.037776e-08
0.9812151.5786571.036285e-08
0.9864431.5785751.034786e-08
0.9916991.5784931.033280e-08
0.9969831.578411.031765e-08
1.00231.5783281.030242e-08
1.007641.5782461.028711e-08
1.0131.5781651.027172e-08
1.01841.5780831.025625e-08
1.023831.5780021.024069e-08
1.029281.577921.022506e-08
1.034771.5778391.020934e-08
1.040281.5777581.019353e-08
1.045821.5776761.017764e-08
1.05141.5775951.016167e-08
1.0571.5775141.014561e-08
1.061.5774711.013700e-08
1.062631.5774331.063061e-08
1.068291.5773521.169373e-08
1.073981.5772711.276252e-08
1.07971.577191.383701e-08
1.085461.5771091.491722e-08
1.091241.5770281.600318e-08
1.097061.5769471.709493e-08
1.10291.5768661.819250e-08
1.108781.5767851.929592e-08
1.114681.5767042.040521e-08
1.120621.5766222.152042e-08
1.126591.5765412.264157e-08
1.13261.576462.376869e-08
1.138631.5763782.490181e-08
1.14471.5762972.604098e-08
1.15081.5762152.718621e-08
1.156931.5761332.833754e-08
1.163091.5760512.949501e-08
1.169291.5759693.065865e-08
1.175521.5758873.182849e-08
1.181781.5758053.300456e-08
1.188081.5757223.418689e-08
1.194411.5756393.537553e-08
1.200771.5755563.657050e-08
1.207171.5754733.777183e-08
1.21361.575393.897957e-08
1.220071.5753064.019374e-08
1.226571.5752234.141438e-08
1.233111.5751384.264153e-08
1.239681.5750544.387521e-08
1.246281.574974.511546e-08
1.252921.5748854.636233e-08
1.25961.57484.761584e-08
1.266311.5747144.887602e-08
1.273061.5746295.014292e-08
1.279841.5745435.141657e-08
1.286661.5744565.269701e-08
1.293511.574375.398427e-08
1.30041.5742835.527839e-08
1.307331.5741955.657940e-08
1.31431.5741085.788734e-08
1.32131.5740195.920226e-08
1.328341.5739316.052418e-08
1.335421.5738426.185314e-08
1.342531.5737536.318918e-08
1.349691.5736636.453235e-08
1.356881.5735736.588266e-08
1.364111.5734826.724018e-08
1.371381.5733916.860492e-08
1.378681.57336.997694e-08
1.386031.5732087.135627e-08
1.393411.5731157.274295e-08
1.400841.5730227.413701e-08
1.40831.5729297.553851e-08
1.415811.5728347.694747e-08
1.423351.572747.836393e-08
1.430931.5726457.978795e-08
1.438561.5725498.121955e-08
1.446221.5724538.265878e-08
1.453931.5723568.410568e-08
1.461671.5722588.556028e-08
1.469461.572168.702264e-08
1.477291.5720628.849279e-08
1.485161.5719628.997077e-08
1.493081.5718629.145663e-08
1.501031.5717629.295040e-08
1.509031.571669.445214e-08
1.517071.5715599.596187e-08
1.525151.5714569.747965e-08
1.531.5713949.839000e-08
1.533281.5713521.020628e-07
1.541451.5712481.112163e-07
1.549661.5711431.204186e-07
1.557921.5710381.296699e-07
1.566221.5709311.389704e-07
1.574561.5708241.483206e-07
1.582951.5707161.577205e-07
1.591391.5706081.671705e-07
1.599871.5704981.766709e-07
1.608391.5703881.862219e-07
1.616961.5702761.958238e-07
1.625571.5701642.054769e-07
1.634241.5700512.151814e-07
1.642941.5699372.249376e-07
1.65171.5698222.347457e-07
1.66051.5697072.446062e-07
1.669341.569592.545191e-07
1.678241.5694722.644849e-07
1.687181.5693542.745038e-07
1.696171.5692342.845761e-07
1.705211.5691132.947020e-07
1.714291.5689923.048819e-07
1.723431.5688693.151160e-07
1.732611.5687453.254047e-07
1.741841.5686213.357481e-07
1.751121.5684953.461467e-07
1.760451.5683683.566007e-07
1.769831.568243.671104e-07
1.779261.568113.776761e-07
1.788741.567983.882980e-07
1.798271.5678483.989766e-07
1.807851.5677164.097121e-07
1.817491.5675824.205048e-07
1.827171.5674464.313549e-07
1.83691.567314.422629e-07
1.846691.5671724.532290e-07
1.856531.5670334.642535e-07
1.866421.5668934.753368e-07
1.876371.5667514.864791e-07
1.886371.5666084.976808e-07
1.896421.5664645.089422e-07
1.906521.5663185.202636e-07
1.916681.5661715.316453e-07
1.926891.5660235.430876e-07
1.937161.5658735.545909e-07
1.947481.5657215.661555e-07
1.957851.5655685.777817e-07
1.968291.5654145.894699e-07
1.971.5653895.913900e-07
1.978771.5652586.584000e-07
1.989321.5651017.389257e-07
1.999921.5649418.198804e-07
2.010571.5647819.012664e-07
2.021281.5646189.830861e-07
2.032051.5644541.065342e-06
2.042881.5642891.148036e-06
2.053771.5641221.231170e-06
2.064711.5639521.314748e-06
2.075711.5637821.398770e-06
2.086771.5636091.483241e-06
2.097891.5634351.568161e-06
2.109061.5632591.653534e-06
2.12031.5630811.739362e-06
2.13161.5629011.825647e-06
2.142961.5627191.912392e-06
2.154371.5625351.999599e-06
2.165851.562352.087271e-06
2.177391.5621622.175409e-06
2.188991.5619722.264018e-06
2.200661.5617812.353098e-06
2.212381.5615872.442654e-06
2.224171.5613912.532686e-06
2.236021.5611932.623198e-06
2.247931.5609932.714192e-06
2.259911.5607912.805671e-06
2.271951.5605862.897638e-06
2.284061.5603792.990094e-06
2.296231.560173.083043e-06
2.308461.5599593.176488e-06
2.320761.5597453.270430e-06
2.3251.5596713.302800e-06
2.333131.5595293.506999e-06
2.345561.5593113.819339e-06
2.358061.559094.133344e-06
2.370621.5588664.449021e-06
2.383251.558644.766381e-06
2.395951.5584125.085432e-06
2.408711.5581815.406182e-06
2.421551.5579475.728641e-06
2.434451.557716.052819e-06
2.447421.5574716.378724e-06
2.460461.5572296.706365e-06
2.473571.5569857.035752e-06
2.486751.5567377.366894e-06
2.51.5564877.699800e-06

Optical transmission calculator

Free-standing sample in vacuum, normal incidence
Method
Transmittance T
—
Reflectance R
—

Fresnel reflection calculator

Direction
Rp
—
Rs
—
R = (Rp+Rs)/2
—
Phase φp
—
Phase φs
—
Brewster angle θB
—
Critical angle θC
—