Optical constants

Refractive index of K-LaSFn6 (SUMITA)

K-LaSFn6: n,k 0.36–1.55 µm

Data
formula 3 + tabulated k
Range
0.36–1.55 µm
Temperature
293 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.36–1.55 µm
Refractive index n
1.804
Extinction coefficient k
2.56224e-08
Permittivity ε1
3.25442
Permittivity ε2
9.24456e-08
Absorption coefficient α
0.00547958 cm⁻¹
Penetration depth δ = λ/(2πk)
3.64991e+09 nm
Abbe number Vd
46.595
Chromatic dispersion dn/dλ
-0.0885735 µm⁻¹
Group index ng
1.85605
Group velocity dispersion
161.486 fs²/mm
Dispersion parameter D
-880.994 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

# K-LaSFn6 (SUMITA): K-LaSFn6
sumita_k_lasfn6 = ls.fetch_refractiveindex("specs", "SUMITA-optical", "K-LaSFn6", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(sumita_k_lasfn6.range_nm)  # (360, 1550) nm
eps = sumita_k_lasfn6.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

Polynomial (formula 3), λ in µm
n2=3.1766024−0.015214563⁢λ2.0+0.026674405⁢λ−2.0+0.00074674513⁢λ−4.0−2.63508×10-5⁢λ−6.0+2.7514981×10-6⁢λ−8.0

Valid from 0.36 to 1.55 µm.

Coefficients as stored
CiValue
C13.1766024
C2-0.015214563
C32.0
C40.026674405
C5-2.0
C60.00074674513
C7-4.0
C8-2.63508e-05
C9-6.0
C102.7514981e-06
C11-8.0

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: 1.72e-06 1.48e-08 -1.94e-10 5.94e-07 9.48e-10 0.205
nd
1.80400
Vd
46.6
glass code
804466
density
value: 4720
thermal expansion
value: 5.9e-06, temperature range: 243 343; value: 7.4e-06, temperature range: 293 573
dPgF
-0.0098
resistance
acid: 3.0; climatic: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = 2.10e-06 K⁻¹ at 633 nm, dn/dT = 1.26e-06 K⁻¹ at 1310 nm, dn/dT = 1.19e-06 K⁻¹ at 1550 nm

References

Cite

SUMITA Zemax catalog 2017-02-02 (obtained from http://www.sumita-opt.co.jp); See also SUMITA optical glass data book; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

Computed on 416 wavelengths, the same grid as the API and the library
K-LaSFn6 (SUMITA), K-LaSFn6: n and k versus wavelength
λ (µm)nk
0.361.8500165.685200e-07
0.361321.8494275.458238e-07
0.3626441.8488435.230445e-07
0.3639731.8482665.001816e-07
0.3653081.8476944.772349e-07
0.3666471.8471294.542042e-07
0.3679911.8465684.310890e-07
0.369341.8460134.078890e-07
0.371.8457453.965300e-07
0.3706931.8454643.881196e-07
0.3720521.844923.716385e-07
0.3734161.8443823.550970e-07
0.3747851.8438483.384948e-07
0.3761591.843323.218318e-07
0.3775371.8427973.051077e-07
0.3789211.8422792.883223e-07
0.381.841882.752400e-07
0.380311.8417662.733774e-07
0.3817041.8412572.650116e-07
0.3831041.8407542.566151e-07
0.3845081.8402552.481878e-07
0.3859171.8397622.397296e-07
0.3873321.8392722.312405e-07
0.3887521.8387882.227202e-07
0.391.8383672.152300e-07
0.3901771.8383082.144892e-07
0.3916071.8378322.084979e-07
0.3930431.8373612.024847e-07
0.3944831.8368941.964494e-07
0.3959291.8364321.903920e-07
0.3973811.8359741.843124e-07
0.3988371.835521.782105e-07
0.41.8351621.733400e-07
0.4002991.835071.727878e-07
0.4017671.8346241.700806e-07
0.4032391.8341831.673634e-07
0.4047171.8337451.646363e-07
0.4062011.8333111.618991e-07
0.407691.8328821.591520e-07
0.4091841.8324561.563947e-07
0.4106841.8320341.536274e-07
0.412191.8316161.508499e-07
0.4137011.8312011.480622e-07
0.4152171.830791.452644e-07
0.4167391.8303831.424562e-07
0.4182671.829981.396378e-07
0.41981.829581.368090e-07
0.421.8295281.364400e-07
0.4213391.8291831.354145e-07
0.4228831.8287911.342314e-07
0.4244331.8284011.330440e-07
0.4259891.8280151.318523e-07
0.4275511.8276321.306561e-07
0.4291181.8272531.294556e-07
0.4306911.8268771.282507e-07
0.432271.8265041.270414e-07
0.4338541.8261351.258277e-07
0.4354451.8257681.246095e-07
0.4370411.8254051.233868e-07
0.4386431.8250451.221596e-07
0.441.8247431.211200e-07
0.4402511.8246881.209994e-07
0.4418641.8243341.202232e-07
0.4434841.8239831.194441e-07
0.445111.8236351.186622e-07
0.4467411.823291.178774e-07
0.4483791.8229481.170897e-07
0.4500231.8226091.162992e-07
0.4516721.8222731.155057e-07
0.4533281.8219391.147093e-07
0.454991.8216091.139100e-07
0.4566571.8212811.131078e-07
0.4583311.8209551.123026e-07
0.461.8206351.115000e-07
0.4600111.8206331.114961e-07
0.4616981.8203131.109101e-07
0.463391.8199961.103220e-07
0.4650891.8196821.097317e-07
0.4667931.819371.091393e-07
0.4685051.8190611.085447e-07
0.4702221.8187541.079479e-07
0.4719461.818451.073489e-07
0.4736751.8181481.067478e-07
0.4754121.8178491.061444e-07
0.4771541.8175521.055388e-07
0.4789041.8172571.049310e-07
0.481.8170751.045500e-07
0.4806591.8169651.030865e-07
0.4824211.8166769.917370e-08
0.4841891.8163899.524659e-08
0.4859641.8161049.130509e-08
0.4877461.8158218.734914e-08
0.4895331.8155418.337869e-08
0.4913281.8152637.939369e-08
0.4931291.8149877.539408e-08
0.4949361.8147137.137980e-08
0.4967511.8144426.735082e-08
0.4985721.8141726.330706e-08
0.51.8139636.013500e-08
0.5003991.8139055.990035e-08
0.5022331.813645.882217e-08
0.5040741.8133775.774003e-08
0.5059221.8131165.665393e-08
0.5077771.8128575.556384e-08
0.5096381.8126015.446976e-08
0.5115061.8123465.337167e-08
0.5133811.8120935.226956e-08
0.5152631.8118425.116340e-08
0.5171521.8115945.005319e-08
0.5190471.8113474.893891e-08
0.520951.8111024.782054e-08
0.522861.8108594.669808e-08
0.5247761.8106184.557150e-08
0.52671.8103784.444079e-08
0.5286311.8101414.330594e-08
0.5305681.8099054.216693e-08
0.5325131.8096714.102374e-08
0.5344651.8094393.987636e-08
0.5364241.8092093.872478e-08
0.5383911.8089813.756897e-08
0.5403641.8087543.640893e-08
0.5423451.8085293.524463e-08
0.5443331.8083063.407607e-08
0.5463281.8080843.290322e-08
0.5483311.8078643.172608e-08
0.551.8076833.074500e-08
0.5503411.8076463.069856e-08
0.5523581.8074293.042371e-08
0.5543831.8072143.014786e-08
0.5564151.8070012.987100e-08
0.5584551.8067892.959313e-08
0.5605021.8065792.931423e-08
0.5625561.806372.903432e-08
0.5646191.8061632.875337e-08
0.5666881.8059582.847140e-08
0.5687651.8057542.818840e-08
0.570851.8055512.790435e-08
0.5729431.805352.761927e-08
0.5750431.8051512.733314e-08
0.5771511.8049522.704596e-08
0.5792671.8047562.675773e-08
0.581391.8045612.646844e-08
0.5835211.8043672.617809e-08
0.585661.8041742.588668e-08
0.5878071.8039832.559420e-08
0.5899611.8037942.530065e-08
0.5921241.8036062.500602e-08
0.5942951.8034192.471031e-08
0.5964731.8032332.441352e-08
0.5986591.8030492.411564e-08
0.61.8029372.393300e-08
0.6008541.8028662.370111e-08
0.6030561.8026842.310300e-08
0.6052671.8025042.250270e-08
0.6074861.8023252.190020e-08
0.6097121.8021472.129549e-08
0.6119471.8019712.068856e-08
0.6141911.8017952.007940e-08
0.6164421.8016211.946802e-08
0.6187021.8014491.885439e-08
0.620971.8012771.823851e-08
0.6232461.8011061.762038e-08
0.625531.8009371.699998e-08
0.6278231.8007691.637730e-08
0.6301251.8006021.575235e-08
0.6324341.8004361.512510e-08
0.6347531.8002721.449555e-08
0.6370791.8001081.386370e-08
0.6394151.7999461.322953e-08
0.6417591.7997841.259303e-08
0.6441111.7996241.195420e-08
0.6464721.7994651.131303e-08
0.6488421.7993071.066951e-08
0.651.799231.035500e-08
0.651221.799151.037445e-08
0.6536071.7989941.041250e-08
0.6560031.7988391.045069e-08
0.6584081.7986851.048902e-08
0.6608211.7985321.052749e-08
0.6632441.798381.056610e-08
0.6656751.7982291.060486e-08
0.6681151.7980791.064375e-08
0.6705641.797931.068279e-08
0.6730221.7977821.072197e-08
0.6754891.7976351.076130e-08
0.6779651.7974891.080077e-08
0.680451.7973441.084038e-08
0.6829451.79721.088014e-08
0.6854481.7970571.092004e-08
0.6879611.7969141.096009e-08
0.6904821.7967731.100029e-08
0.6930131.7966321.104063e-08
0.6955541.7964931.108113e-08
0.6981031.7963541.112177e-08
0.71.7962511.115200e-08
0.7006621.7962161.116255e-08
0.7032311.7960791.120347e-08
0.7058091.7959421.124453e-08
0.7083961.7958071.128574e-08
0.7109921.7956721.132711e-08
0.7135991.7955381.136863e-08
0.7162141.7954061.141030e-08
0.718841.7952731.145212e-08
0.7214751.7951421.149409e-08
0.7241191.7950111.153622e-08
0.7267741.7948821.157851e-08
0.7294381.7947521.162095e-08
0.7321121.7946241.166354e-08
0.7347951.7944971.170629e-08
0.7374891.794371.174920e-08
0.7401921.7942441.179226e-08
0.7429051.7941181.183548e-08
0.7456291.7939941.187886e-08
0.7483621.793871.192240e-08
0.7511051.7937471.196610e-08
0.7538581.7936241.200996e-08
0.7566221.7935021.205398e-08
0.7593951.7933811.209816e-08
0.7621791.7932611.214251e-08
0.7649731.7931411.218701e-08
0.7677771.7930221.223168e-08
0.7705911.7929031.227652e-08
0.7734161.7927861.232151e-08
0.7762511.7926681.236668e-08
0.7790961.7925521.241200e-08
0.7819521.7924361.245750e-08
0.7848181.792321.250316e-08
0.7876951.7922061.254899e-08
0.7905831.7920921.259498e-08
0.7934811.7919781.264115e-08
0.7963891.7918651.268748e-08
0.7993091.7917531.273398e-08
0.81.7917261.274500e-08
0.8022381.7916411.278066e-08
0.8051791.791531.282751e-08
0.8081311.7914191.287453e-08
0.8110931.7913091.292172e-08
0.8140661.7911991.296908e-08
0.817051.791091.301662e-08
0.8200451.7909821.306433e-08
0.8230511.7908741.311222e-08
0.8260681.7907661.316028e-08
0.8290961.7906591.320852e-08
0.8321351.7905531.325694e-08
0.8351861.7904471.330553e-08
0.8382471.7903411.335431e-08
0.841321.7902361.340326e-08
0.8444041.7901321.345239e-08
0.8474991.7900281.350169e-08
0.8506061.7899241.355119e-08
0.8537241.7898211.360086e-08
0.8568531.7897181.365071e-08
0.8599941.7896161.370075e-08
0.8631461.7895141.375097e-08
0.866311.7894131.380137e-08
0.8694861.7893121.385196e-08
0.8726731.7892121.390274e-08
0.8758721.7891111.395370e-08
0.8790821.7890121.400484e-08
0.8823051.7889121.405618e-08
0.8855391.7888141.410770e-08
0.8887851.7887151.415941e-08
0.8920431.7886171.421132e-08
0.8953131.7885191.426341e-08
0.8985951.7884221.431569e-08
0.9018891.7883251.436817e-08
0.9051951.7882281.442083e-08
0.9085131.7881321.447369e-08
0.9118431.7880361.452675e-08
0.9151861.7879411.457999e-08
0.918541.7878461.463344e-08
0.9219071.7877511.468708e-08
0.9252871.7876561.474091e-08
0.9286781.7875621.479494e-08
0.9320831.7874681.484918e-08
0.9354991.7873741.490361e-08
0.9389281.7872811.495824e-08
0.942371.7871881.501307e-08
0.9458241.7870951.506810e-08
0.9492911.7870031.512333e-08
0.9527711.7869111.517876e-08
0.9562641.7868191.523440e-08
0.9597691.7867271.529024e-08
0.9632871.7866361.534629e-08
0.9668181.7865451.540254e-08
0.9703621.7864541.545900e-08
0.9739191.7863641.551567e-08
0.9774891.7862741.557254e-08
0.9810721.7861841.562962e-08
0.9846681.7860941.568691e-08
0.9882781.7860041.574441e-08
0.9919011.7859151.580212e-08
0.9955361.7858261.586005e-08
0.9991861.7857371.591818e-08
1.002851.7856481.597653e-08
1.006521.785561.603509e-08
1.010211.7854711.609387e-08
1.013921.7853831.615286e-08
1.017631.7852951.621207e-08
1.021361.7852081.627150e-08
1.025111.785121.633114e-08
1.028871.7850331.639100e-08
1.032641.7849461.645108e-08
1.036421.7848591.651139e-08
1.040221.7847721.657191e-08
1.044031.7846851.663265e-08
1.047861.7845981.669362e-08
1.05171.7845121.675481e-08
1.055561.7844261.681623e-08
1.059431.784341.687787e-08
1.061.7843271.688700e-08
1.063311.7842531.693974e-08
1.067211.7841681.700184e-08
1.071121.7840821.706416e-08
1.075051.7839961.712671e-08
1.078991.7839111.718950e-08
1.082941.7838251.725251e-08
1.086911.783741.731575e-08
1.09091.7836551.737923e-08
1.094891.7835691.744294e-08
1.098911.7834841.750688e-08
1.102941.7833991.757105e-08
1.106981.7833141.763547e-08
1.111041.783231.770011e-08
1.115111.7831451.776500e-08
1.11921.783061.783012e-08
1.12331.7829751.789548e-08
1.127421.7828911.796108e-08
1.131551.7828061.802692e-08
1.13571.7827221.809301e-08
1.139861.7826371.815933e-08
1.144041.7825531.822590e-08
1.148231.7824681.829271e-08
1.152441.7823841.835977e-08
1.156671.78231.842707e-08
1.160911.7822151.849462e-08
1.165161.7821311.856241e-08
1.169431.7820471.863046e-08
1.173721.7819621.869875e-08
1.178021.7818781.876730e-08
1.182341.7817941.883610e-08
1.186671.7817091.890514e-08
1.191021.7816251.897445e-08
1.195391.781541.904400e-08
1.199771.7814561.911381e-08
1.204171.7813711.918388e-08
1.208581.7812871.925420e-08
1.213011.7812021.932478e-08
1.217461.7811181.939562e-08
1.221921.7810331.946672e-08
1.22641.7809481.953808e-08
1.23091.7808631.960970e-08
1.235411.7807791.968159e-08
1.239941.7806941.975374e-08
1.244481.7806091.982615e-08
1.249041.7805241.989883e-08
1.253621.7804381.997177e-08
1.258221.7803532.004498e-08
1.262831.7802682.011846e-08
1.267461.7801822.019221e-08
1.272111.7800972.026623e-08
1.276771.7800112.034052e-08
1.281451.7799252.041509e-08
1.286151.7798392.048992e-08
1.290861.7797532.056503e-08
1.295591.7796672.064042e-08
1.300341.7795812.071608e-08
1.305111.7794942.079202e-08
1.309891.7794082.086824e-08
1.314691.7793212.094474e-08
1.319511.7792342.102151e-08
1.324351.7791472.109857e-08
1.32921.779062.117592e-08
1.334081.7789722.125354e-08
1.338971.7788852.133145e-08
1.343881.7787972.140965e-08
1.34881.7787092.148813e-08
1.353751.7786212.156690e-08
1.358711.7785332.164596e-08
1.363691.7784442.172531e-08
1.368691.7783562.180495e-08
1.37371.7782672.188488e-08
1.378741.7781782.196510e-08
1.383791.7780882.204562e-08
1.388871.7779992.212643e-08
1.393961.7779092.220754e-08
1.399071.7778192.228895e-08
1.40421.7777292.237065e-08
1.409341.7776382.245266e-08
1.414511.7775482.253496e-08
1.419691.7774572.261757e-08
1.42491.7773652.270048e-08
1.430121.7772742.278370e-08
1.435361.7771822.286721e-08
1.440621.777092.295104e-08
1.445911.7769982.303517e-08
1.451211.7769052.311961e-08
1.456521.7768122.320436e-08
1.461861.7767192.328942e-08
1.467221.7766262.337480e-08
1.47261.7765322.346048e-08
1.4781.7764382.354648e-08
1.483421.7763432.363280e-08
1.488851.7762492.371943e-08
1.494311.7761542.380638e-08
1.499791.7760582.389365e-08
1.51.7760552.389700e-08
1.505291.7759632.859693e-08
1.51081.7758673.350195e-08
1.516341.775773.842496e-08
1.52191.7756744.336602e-08
1.527481.7755764.832518e-08
1.533081.7754795.330253e-08
1.53871.7753815.829812e-08
1.544341.7752836.331202e-08
1.551.7751846.834430e-08

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
—