Optical constants

Refractive index of S-NBH8 (OHARA)

S-NBH8: n,k 0.33–2.4 µm

Data
formula 2 + tabulated k
Range
0.33–2.4 µm
Temperature
298 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.33–2.4 µm
Refractive index n
1.72046
Extinction coefficient k
1.51379e-08
Permittivity ε1
2.95999
Permittivity ε2
5.20882e-08
Absorption coefficient α
0.00323737 cm⁻¹
Penetration depth δ = λ/(2πk)
6.17785e+09 nm
Abbe number Vd
34.708
Chromatic dispersion dn/dλ
-0.105276 µm⁻¹
Group index ng
1.78232
Group velocity dispersion
203.97 fs²/mm
Dispersion parameter D
-1112.77 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

# S-NBH8 (OHARA): S-NBH8
ohara_s_nbh8 = ls.fetch_refractiveindex("specs", "OHARA-optical", "S-NBH8", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ohara_s_nbh8.range_nm)  # (330, 2400) nm
eps = ohara_s_nbh8.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=1.61344136λ2λ2−0.0106386752+0.257295888λ2λ2−0.0487071624+1.98364455λ2λ2−159.784404

Valid from 0.33 to 2.4 µm.

Coefficients as stored
CiValue
C10.0
C21.61344136
C30.0106386752
C40.257295888
C50.0487071624
C61.98364455
C7159.784404

Comments and conditions

Recommended

Conditions

temperature
298 K

Properties

thermal dispersion
type: formula A, coefficients: 4.76e-07 9.72e-09 -3.07e-11 8.22e-07 9.16e-10 0.251
nd
1.720467
Vd
34.707984
glass code
720347
density
value: 3190
thermal expansion
value: 8.1e-06, temperature range: 243 343; value: 1e-05, temperature range: 293 573
dPgF
-0.0019
resistance
acid: 1.0; climatic: 2.0; phosphate: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 298.0 K): dn/dT = 1.65e-06 K⁻¹ at 633 nm, dn/dT = 5.37e-07 K⁻¹ at 1310 nm, dn/dT = 4.54e-07 K⁻¹ at 1550 nm

References

Cite

OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp); See also OHARA 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 425 wavelengths, the same grid as the API and the library
S-NBH8 (OHARA), S-NBH8: n and k versus wavelength
λ (µm)nk
0.331.8034059.208400e-06
0.3316451.8018458.328750e-06
0.3332981.8003167.444714e-06
0.334961.7988176.556272e-06
0.336631.7973475.663400e-06
0.3383081.7959054.766078e-06
0.3399941.7944913.864282e-06
0.341.7944873.861300e-06
0.3416891.7931043.544632e-06
0.3433931.7917433.225335e-06
0.3451051.7904072.904447e-06
0.3468251.7890962.581958e-06
0.3485541.7878092.257863e-06
0.351.7867551.986800e-06
0.3502921.7865451.962325e-06
0.3520381.7853031.815727e-06
0.3537931.7840831.668398e-06
0.3555561.7828851.520335e-06
0.3573291.7817081.371534e-06
0.359111.7805511.221990e-06
0.361.7799831.147300e-06
0.3609011.7794141.106484e-06
0.36271.7782961.024938e-06
0.3645081.7771989.429854e-07
0.3663251.7761178.606243e-07
0.3681511.7750557.778526e-07
0.3699861.774016.946682e-07
0.371.7740026.940500e-07
0.3718311.7729826.504825e-07
0.3736841.771976.063717e-07
0.3755471.7709765.620410e-07
0.3774191.7699975.174892e-07
0.3793011.7690334.727154e-07
0.381.768684.560800e-07
0.3811921.7680854.374209e-07
0.3830921.7671524.076699e-07
0.3850021.7662333.777705e-07
0.3869211.7653283.477221e-07
0.388851.7644373.175239e-07
0.391.7639152.995200e-07
0.3907891.763562.925031e-07
0.3927371.7626972.751666e-07
0.3946941.7618462.577437e-07
0.3966621.7610082.402340e-07
0.398641.7601822.226369e-07
0.41.7596242.105300e-07
0.4006271.7593692.079899e-07
0.4026241.7585681.998963e-07
0.4046311.7577781.917624e-07
0.4066481.7571.835879e-07
0.4086751.7562331.753727e-07
0.4107131.7554781.671165e-07
0.412761.7547331.588192e-07
0.4148181.7539981.504805e-07
0.4168861.7532741.421002e-07
0.4189641.7525611.336781e-07
0.421.752211.294800e-07
0.4210531.7518571.278988e-07
0.4231521.7511631.247459e-07
0.4252611.7504791.215772e-07
0.4273811.7498041.183928e-07
0.4295121.7491381.151925e-07
0.4316531.7484821.119762e-07
0.4338051.7478341.087439e-07
0.4359671.7471961.054955e-07
0.4381411.7465661.022309e-07
0.441.7460369.943800e-08
0.4403251.7459449.908476e-08
0.442521.7453319.669782e-08
0.4447261.7447259.429899e-08
0.4469431.7441289.188820e-08
0.4491711.7435398.946539e-08
0.451411.7429578.703050e-08
0.4536611.7423838.458348e-08
0.4559221.7418178.212425e-08
0.4581951.7412577.965277e-08
0.461.740827.769000e-08
0.4604791.7407057.730476e-08
0.4627751.7401617.545913e-08
0.4650821.7396237.360430e-08
0.46741.7390927.174023e-08
0.469731.7385676.986686e-08
0.4720721.7380496.798416e-08
0.4744251.7375386.609207e-08
0.476791.7370336.419054e-08
0.4791671.7365356.227954e-08
0.481.7363626.161000e-08
0.4815561.7360436.024076e-08
0.4839571.7355565.812821e-08
0.4863691.7350765.600512e-08
0.4887941.7346025.387146e-08
0.4912311.7341335.172716e-08
0.4936791.7336714.957216e-08
0.496141.7332144.740643e-08
0.4986141.7327624.522989e-08
0.51.7325124.401000e-08
0.5010991.7323164.342801e-08
0.5035971.7318754.210564e-08
0.5061081.7314394.077668e-08
0.5086311.7310093.944109e-08
0.5111671.7305843.809885e-08
0.5137151.7301643.674991e-08
0.5162761.7297483.539425e-08
0.5188491.7293383.403183e-08
0.5214361.7289333.266262e-08
0.5240351.7285323.128659e-08
0.5266481.7281362.990369e-08
0.5292731.7277442.851390e-08
0.5319121.7273572.711718e-08
0.5345631.7269752.571350e-08
0.5372281.7265962.430282e-08
0.5399061.7262222.288511e-08
0.5425981.7258532.146033e-08
0.5453031.7254872.002845e-08
0.5480211.7251261.858943e-08
0.551.7248671.754200e-08
0.5507531.7247691.749383e-08
0.5534991.7244161.731828e-08
0.5562581.7240671.714185e-08
0.5590311.7237211.696455e-08
0.5618181.723381.678636e-08
0.5646191.7230421.660728e-08
0.5674331.7227081.642730e-08
0.5702621.7223781.624643e-08
0.5731051.7220511.606466e-08
0.5759621.7217281.588199e-08
0.5788331.7214081.569840e-08
0.5817191.7210921.551389e-08
0.5846191.720781.532847e-08
0.5875331.720471.514212e-08
0.5904621.7201641.495485e-08
0.5934061.7198611.476664e-08
0.5963641.7195621.457749e-08
0.5993371.7192651.438740e-08
0.61.71921.434500e-08
0.6023251.7189721.440061e-08
0.6053271.7186821.447243e-08
0.6083451.7183951.454461e-08
0.6113781.7181111.461715e-08
0.6144261.717831.469006e-08
0.6174891.7175521.476333e-08
0.6205671.7172761.483696e-08
0.623661.7170041.491096e-08
0.6267691.7167341.498532e-08
0.6298941.7164671.506006e-08
0.6330341.7162031.513518e-08
0.636191.7159411.521066e-08
0.6393611.7156821.528652e-08
0.6425491.7154261.536276e-08
0.6457521.7151721.543938e-08
0.6489711.7149211.551639e-08
0.651.7148421.554100e-08
0.6522061.7146721.534734e-08
0.6554581.7144261.506193e-08
0.6587251.7141821.477511e-08
0.6620091.7139411.448685e-08
0.6653091.7137021.419716e-08
0.6686261.7134651.390602e-08
0.6719591.7132311.361344e-08
0.6753091.7129981.331939e-08
0.6786751.7127681.302388e-08
0.6820591.7125411.272689e-08
0.6854591.7123151.242843e-08
0.6888761.7120921.212847e-08
0.692311.711871.182702e-08
0.6957611.7116511.152407e-08
0.699231.7114341.121961e-08
0.71.7113861.115200e-08
0.7027161.7112191.102212e-08
0.7062191.7110051.085458e-08
0.7097391.7107941.068621e-08
0.7132771.7105851.051699e-08
0.7168331.7103771.034693e-08
0.7204071.7101721.017603e-08
0.7239981.7099681.000427e-08
0.7276071.7097669.831651e-09
0.7312351.7095669.658175e-09
0.734881.7093689.483835e-09
0.7385431.7091719.308625e-09
0.7422251.7089779.132542e-09
0.7459251.7087838.955581e-09
0.7496441.7085928.777738e-09
0.7533811.7084028.599008e-09
0.7571371.7082148.419387e-09
0.7609111.7080278.238871e-09
0.7647041.7078428.057455e-09
0.7685161.7076597.875135e-09
0.7723481.7074777.691905e-09
0.7761981.7072977.507762e-09
0.7800671.7071187.322702e-09
0.7839561.706947.136718e-09
0.7878641.7067646.949808e-09
0.7917921.706596.761966e-09
0.7957391.7064176.573187e-09
0.7997061.7062456.383467e-09
0.81.7062326.369400e-09
0.8036931.7060746.398800e-09
0.8076991.7059056.430700e-09
0.8117261.7057376.462759e-09
0.8157721.7055716.494977e-09
0.8198391.7054066.527357e-09
0.8239261.7052426.559898e-09
0.8280331.7050796.592601e-09
0.8321611.7049176.625467e-09
0.836311.7047576.658497e-09
0.8404791.7045986.691691e-09
0.8446691.704446.725051e-09
0.8488791.7042836.758578e-09
0.8531111.7041276.792271e-09
0.8573641.7039736.826133e-09
0.8616381.7038196.860163e-09
0.8659341.7036666.894363e-09
0.870251.7035156.928733e-09
0.8745891.7033656.963275e-09
0.8789491.7032156.997989e-09
0.883331.7030677.032876e-09
0.8877341.7029197.067937e-09
0.8921591.7027737.103172e-09
0.8966071.7026277.138584e-09
0.91.7025177.165600e-09
0.9010771.7024837.174171e-09
0.9055691.7023397.209931e-09
0.9100831.7021967.245870e-09
0.914621.7020547.281989e-09
0.9191791.7019137.318287e-09
0.9237621.7017737.354766e-09
0.9283671.7016337.391427e-09
0.9329951.7014957.428271e-09
0.9376461.7013577.465299e-09
0.942321.701227.502511e-09
0.9470181.7010847.539908e-09
0.9517391.7009487.577492e-09
0.9564831.7008137.615264e-09
0.9612521.7006797.653223e-09
0.9660441.7005467.691372e-09
0.9708591.7004137.729712e-09
0.9756991.7002817.768242e-09
0.9805631.700157.806964e-09
0.9854521.7000197.845879e-09
0.9903641.6998897.884989e-09
0.9953011.699767.924293e-09
11.6996387.961700e-09
1.000261.6996317.963794e-09
1.005251.6995028.003496e-09
1.010261.6993758.043396e-09
1.01531.6992488.083495e-09
1.020361.6991218.123794e-09
1.025451.6989958.164294e-09
1.030561.6988698.204995e-09
1.035691.6987448.245900e-09
1.040861.698628.287008e-09
1.046051.6984968.328322e-09
1.051261.6983728.369841e-09
1.05651.6982498.411568e-09
1.061771.6981268.453502e-09
1.067061.6980048.495645e-09
1.072381.6978828.537999e-09
1.077731.697768.580564e-09
1.08311.6976398.623340e-09
1.08851.6975188.666330e-09
1.093931.6973988.709535e-09
1.099381.6972778.752955e-09
1.104861.6971588.796591e-09
1.110371.6970388.840445e-09
1.11591.6969198.884517e-09
1.121471.69688.928809e-09
1.127061.6966818.973322e-09
1.132671.6965639.018057e-09
1.138321.6964459.063015e-09
1.1441.6963279.108197e-09
1.14971.6962099.153604e-09
1.155431.6960929.199237e-09
1.161191.6959759.245098e-09
1.166981.6958579.291188e-09
1.17281.6957419.337507e-09
1.178641.6956249.384058e-09
1.184521.6955079.430840e-09
1.190421.6953919.477856e-09
1.196361.6952749.525106e-09
1.21.6952039.554100e-09
1.202321.6951589.831851e-09
1.208321.6950421.054867e-08
1.214341.6949261.126906e-08
1.220391.694811.199305e-08
1.226481.6946941.272064e-08
1.232591.6945781.345186e-08
1.238741.6944621.418673e-08
1.244911.6943461.492526e-08
1.251121.694231.566747e-08
1.257351.6941151.641338e-08
1.263621.6939991.716301e-08
1.269921.6938831.791638e-08
1.276251.6937671.867350e-08
1.282611.6936511.943440e-08
1.289011.6935352.019909e-08
1.295431.6934192.096759e-08
1.301891.6933032.173992e-08
1.308381.6931862.251610e-08
1.314911.693072.329616e-08
1.321461.6929532.408010e-08
1.328051.6928372.486795e-08
1.334671.692722.565972e-08
1.341321.6926032.645545e-08
1.348011.6924862.725514e-08
1.354731.6923682.805882e-08
1.361481.6922512.886650e-08
1.368271.6921332.967821e-08
1.375091.6920153.049397e-08
1.381951.6918963.131379e-08
1.388831.6917783.213770e-08
1.395761.6916593.296572e-08
1.41.6915873.347300e-08
1.402721.691543.353795e-08
1.409711.6914213.370515e-08
1.416741.6913013.387318e-08
1.42381.6911813.404204e-08
1.43091.6910613.421175e-08
1.438031.690943.438231e-08
1.44521.6908193.455371e-08
1.45241.6906983.472597e-08
1.459641.6905763.489909e-08
1.466921.6904543.507307e-08
1.474231.6903313.524792e-08
1.481581.6902083.542365e-08
1.488971.6900853.560024e-08
1.496391.6899613.577772e-08
1.503851.6898363.595608e-08
1.511351.6897123.613533e-08
1.518881.6895863.631548e-08
1.526451.689463.649652e-08
1.534061.6893343.667847e-08
1.541711.6892073.686132e-08
1.54941.689083.704508e-08
1.557121.6889523.722976e-08
1.564881.6888233.741536e-08
1.572681.6886943.760189e-08
1.580521.6885643.778935e-08
1.58841.6884343.797774e-08
1.596321.6883033.816707e-08
1.61.6882423.825500e-08
1.604281.6881713.989847e-08
1.612281.6880394.296934e-08
1.620321.6879064.605551e-08
1.628391.6877734.915707e-08
1.636511.6876385.227410e-08
1.644671.6875035.540666e-08
1.652871.6873685.855483e-08
1.661111.6872316.171871e-08
1.669391.6870946.489835e-08
1.677711.6869566.809384e-08
1.686071.6868177.130527e-08
1.694481.6866777.453270e-08
1.702931.6865377.777623e-08
1.711421.6863958.103592e-08
1.719951.6862538.431186e-08
1.728521.686118.760413e-08
1.737141.6859669.091282e-08
1.74581.6858229.423800e-08
1.75451.6856769.757976e-08
1.763251.6855291.009382e-07
1.772041.6853821.043133e-07
1.780871.6852331.077053e-07
1.789751.6850841.111142e-07
1.798671.6849331.145401e-07
1.81.6849111.150500e-07
1.807641.6847821.204605e-07
1.816651.6846291.268432e-07
1.825711.6844751.332578e-07
1.834811.6843211.397043e-07
1.843951.6841651.461830e-07
1.853151.6840081.526939e-07
1.862391.683851.592373e-07
1.871671.6836911.658134e-07
1.8811.6835311.724222e-07
1.890381.6833691.790640e-07
1.89981.6832071.857389e-07
1.909271.6830431.924470e-07
1.918791.6828781.991886e-07
1.928351.6827112.059638e-07
1.937971.6825442.127728e-07
1.947631.6823752.196157e-07
1.957341.6822052.264928e-07
1.96711.6820332.334041e-07
1.97691.681862.403498e-07
1.986761.6816862.473302e-07
1.996661.6815112.543454e-07
21.6814512.567100e-07
2.006621.6813342.748815e-07
2.016621.6811553.023595e-07
2.026671.6809753.299745e-07
2.036771.6807943.577271e-07
2.046931.6806113.856181e-07
2.057131.6804274.136481e-07
2.067391.6802414.418178e-07
2.077691.6800544.701280e-07
2.088051.6798654.985793e-07
2.098461.6796745.271725e-07
2.108921.6794825.559081e-07
2.119441.6792885.847871e-07
2.131.6790936.138100e-07
2.140621.6788966.429776e-07
2.151291.6786976.722906e-07
2.162021.6784967.017497e-07
2.172791.6782947.313557e-07
2.183621.678097.611092e-07
2.194511.6778847.910111e-07
2.21.6777798.060900e-07
2.205451.6776768.506566e-07
2.216451.6774669.405536e-07
2.227491.6772551.030899e-06
2.23861.6770411.121694e-06
2.249761.6768261.212942e-06
2.260971.6766091.304645e-06
2.272251.6763891.396806e-06
2.283571.6761681.489425e-06
2.294961.6759451.582507e-06
2.30641.6757191.676052e-06
2.317891.6754921.770064e-06
2.329451.6752621.864544e-06
2.341061.6750311.959496e-06
2.352731.6747972.054920e-06
2.364461.674562.150821e-06
2.376251.6743222.247199e-06
2.38811.6740812.344058e-06
2.41.6738392.441400e-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
—