Optical constants

Refractive index of LAH80 (OHARA)

LAH80: n,k 0.3–2.4 µm

Data
formula 2 + tabulated k
Range
0.3–2.4 µm
Temperature
298 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength. Note: k data cover 360-2400 nm only; k = 0 elsewhere in the n range 300-2400 nm.

At one wavelength

Range 0.3–2.4 µm
Refractive index n
1.88499
Extinction coefficient k
2.67161e-08
Permittivity ε1
3.5532
Permittivity ε2
1.00719e-07
Absorption coefficient α
0.00571348 cm⁻¹
Penetration depth δ = λ/(2πk)
3.50050e+09 nm
Abbe number Vd
30.164
Chromatic dispersion dn/dλ
-0.147854 µm⁻¹
Group index ng
1.97187
Group velocity dispersion
295.515 fs²/mm
Dispersion parameter D
-1612.19 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

# LAH80 (OHARA): LAH80
ohara_lah80 = ls.fetch_refractiveindex("specs", "OHARA-optical", "LAH80", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ohara_lah80.range_nm)  # (300, 2400) nm
eps = ohara_lah80.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=2.06636247λ2λ2−0.0122133846+0.349315832λ2λ2−0.0555959908+1.91746463λ2λ2−125.47362

Valid from 0.3 to 2.4 µm.

Coefficients as stored
CiValue
C10.0
C22.06636247
C30.0122133846
C40.349315832
C50.0555959908
C61.91746463
C7125.47362

Comments and conditions

Conditions

temperature
298 K

Properties

thermal dispersion
type: formula A, coefficients: 2.6e-06 1.15e-08 -3.36e-11 8.82e-07 1.2e-09 0.279
nd
1.885000
Vd
30.163795
glass code
885302
glass status
special
density
value: 3990
thermal expansion
value: 6.6e-06, temperature range: 243 343; value: 8.2e-06, temperature range: 293 573
dPgF
0.0052
resistance
acid: 2.3; climatic: 2.0; phosphate: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 298.0 K): dn/dT = 3.59e-06 K⁻¹ at 633 nm, dn/dT = 2.05e-06 K⁻¹ at 1310 nm, dn/dT = 1.94e-06 K⁻¹ at 1550 nm
Notes on the source data (kept exactly as published):
  • k data cover 360-2400 nm only; k = 0 elsewhere in the n range 300-2400 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 422 wavelengths, the same grid as the API and the library
LAH80 (OHARA), LAH80: n and k versus wavelength
λ (µm)nk
0.32.0744230
0.3015682.0698480
0.3031432.065430
0.3047272.061160
0.306322.057030
0.307922.0530330
0.3095292.0491620
0.3111472.045410
0.3127722.0417730
0.3144072.0382430
0.3160492.0348170
0.3177012.0314880
0.3193612.0282540
0.321032.0251090
0.3227072.022050
0.3243932.0190720
0.3260882.0161730
0.3277922.0133490
0.3295052.0105980
0.3312272.0079150
0.3329582.0052990
0.3346972.0027470
0.3364462.0002560
0.3382041.9978250
0.3399711.995450
0.3417481.993130
0.3435341.9908630
0.3453291.9886470
0.3471331.9864810
0.3489471.9843620
0.350771.9822880
0.3526031.980260
0.3544461.9782740
0.3562981.9763290
0.3581591.9744250
0.361.9725918.059800e-06
0.3600311.972568.043984e-06
0.3619121.9707337.078453e-06
0.3638031.9689436.107877e-06
0.3657041.9671875.132230e-06
0.3676151.9654674.151484e-06
0.3695361.9637793.165614e-06
0.371.9633782.927400e-06
0.3714671.9621252.689093e-06
0.3734081.9605012.373738e-06
0.3753591.9589092.056736e-06
0.377321.9573461.738077e-06
0.3792921.9558121.417753e-06
0.381.955271.302700e-06
0.3812741.9543061.229953e-06
0.3832661.9528281.116170e-06
0.3852691.9513761.001792e-06
0.3872821.9499518.868169e-07
0.3893051.948557.712408e-07
0.391.9480777.315700e-07
0.391341.9471756.978801e-07
0.3933841.9458236.464544e-07
0.395441.9444955.947599e-07
0.3975061.9431895.427954e-07
0.3995831.9419064.905593e-07
0.41.9416524.800800e-07
0.4016711.9406444.629474e-07
0.403771.9394044.414313e-07
0.405881.9381844.198027e-07
0.4080011.9369853.980611e-07
0.4101331.9358053.762060e-07
0.4122761.9346443.542366e-07
0.414431.9335033.321524e-07
0.4165951.9323793.099528e-07
0.4187721.9312742.876373e-07
0.421.9306612.750500e-07
0.420961.9301862.706440e-07
0.423161.9291152.605521e-07
0.4253711.9280612.504076e-07
0.4275941.9270242.402100e-07
0.4298281.9260032.299591e-07
0.4320741.9249972.196547e-07
0.4343321.9240072.092964e-07
0.4366011.9230311.988840e-07
0.4388821.9220711.884172e-07
0.441.9216071.832900e-07
0.4411761.9211251.801819e-07
0.4434811.9201931.740880e-07
0.4457981.9192751.679622e-07
0.4481281.918371.618045e-07
0.4504691.9174791.556145e-07
0.4528231.9166011.493922e-07
0.4551891.9157351.431374e-07
0.4575681.9148831.368499e-07
0.4599591.9140421.305296e-07
0.461.9140281.304200e-07
0.4623621.9132131.264386e-07
0.4647781.9123971.223661e-07
0.4672061.9115911.182724e-07
0.4696481.9107981.141573e-07
0.4721021.9100151.100207e-07
0.4745691.9092431.058624e-07
0.4770481.9084821.016825e-07
0.4795411.9077329.748068e-08
0.481.9075959.670700e-08
0.4820471.9069919.420640e-08
0.4845661.9062619.112905e-08
0.4870981.9055418.803561e-08
0.4896431.9048318.492601e-08
0.4922011.904138.180017e-08
0.4947731.9034397.865799e-08
0.4973581.9027577.549939e-08
0.4999571.9020847.232429e-08
0.51.9020737.227200e-08
0.502571.901427.036448e-08
0.5051961.9007656.841507e-08
0.5078351.9001186.645546e-08
0.5104891.899486.448562e-08
0.5131561.8988516.250548e-08
0.5158381.8982296.051500e-08
0.5185331.8976165.851411e-08
0.5212431.897015.650277e-08
0.5239661.8964125.448092e-08
0.5267041.8958225.244851e-08
0.5294561.895245.040548e-08
0.5322231.8946644.835177e-08
0.5350041.8940964.628733e-08
0.5377991.8935364.421210e-08
0.5406091.8929824.212603e-08
0.5434341.8924354.002906e-08
0.5462741.8918953.792113e-08
0.5491281.8913623.580219e-08
0.551.8912013.515500e-08
0.5519981.8908353.470668e-08
0.5548821.8903153.405932e-08
0.5577811.8898013.340858e-08
0.5606961.8892933.275445e-08
0.5636261.8887923.209689e-08
0.5665711.8882963.143590e-08
0.5695311.8878073.077145e-08
0.5725071.8873233.010353e-08
0.5754981.8868462.943212e-08
0.5785061.8863742.875720e-08
0.5815281.8859072.807876e-08
0.5845671.8854462.739677e-08
0.5876221.8849912.671122e-08
0.5906921.8845412.602208e-08
0.5937791.8840962.532935e-08
0.5968811.8836572.463299e-08
0.61.8832222.393300e-08
0.6031351.8827932.373229e-08
0.6062871.8823682.353053e-08
0.6094551.8819482.332771e-08
0.6126391.8815332.312384e-08
0.615841.8811232.291890e-08
0.6190581.8807182.271289e-08
0.6222931.8803172.250580e-08
0.6255451.8799212.229763e-08
0.6288131.8795292.208837e-08
0.6320991.8791412.187802e-08
0.6354021.8787582.166657e-08
0.6387221.8783792.145402e-08
0.6420591.8780042.124035e-08
0.6454141.8776342.102557e-08
0.6487871.8772672.080967e-08
0.651.8771372.073200e-08
0.6521771.8769052.055803e-08
0.6555851.8765462.028568e-08
0.659011.8761912.001190e-08
0.6624541.875841.973670e-08
0.6659151.8754931.946006e-08
0.6693951.875151.918197e-08
0.6728921.874811.890243e-08
0.6764091.8744741.862143e-08
0.6799431.8741411.833896e-08
0.6834961.8738121.805502e-08
0.6870671.8734861.776959e-08
0.6906571.8731641.748267e-08
0.6942661.8728451.719425e-08
0.6978941.8725291.690432e-08
0.71.8723481.673600e-08
0.7015411.8722171.667452e-08
0.7052061.8719081.652822e-08
0.7088911.8716021.638116e-08
0.7125951.8712991.623332e-08
0.7163191.8709991.608472e-08
0.7200621.8707021.593534e-08
0.7238241.8704081.578518e-08
0.7276061.8701171.563423e-08
0.7314081.8698291.548250e-08
0.735231.8695441.532997e-08
0.7390721.8692611.517665e-08
0.7429341.8689811.502252e-08
0.7468161.8687041.486759e-08
0.7507181.868431.471185e-08
0.7546411.8681581.455530e-08
0.7585841.8678891.439792e-08
0.7625471.8676221.423973e-08
0.7665321.8673581.408071e-08
0.7705371.8670971.392086e-08
0.7745641.8668381.376017e-08
0.7786111.8665811.359864e-08
0.7826791.8663261.343627e-08
0.7867691.8660741.327305e-08
0.790881.8658241.310898e-08
0.7950121.8655771.294405e-08
0.7991671.8653321.277826e-08
0.81.8652831.274500e-08
0.8033421.8650881.279825e-08
0.807541.8648471.286511e-08
0.811761.8646091.293233e-08
0.8160011.8643721.299990e-08
0.8202651.8641371.306782e-08
0.8245511.8639041.313610e-08
0.828861.8636741.320473e-08
0.8331911.8634451.327373e-08
0.8375441.8632181.334308e-08
0.8419211.8629931.341280e-08
0.846321.862771.348288e-08
0.8507421.8625491.355332e-08
0.8551871.8623291.362414e-08
0.8596561.8621111.369532e-08
0.8641481.8618961.376688e-08
0.8686631.8616811.383881e-08
0.8732021.8614691.391111e-08
0.8777651.8612581.398380e-08
0.8823511.8610491.405686e-08
0.8869621.8608411.413030e-08
0.8915971.8606351.420413e-08
0.8962551.860431.427835e-08
0.91.8602681.433800e-08
0.9009391.8602271.442783e-08
0.9056461.8600261.487839e-08
0.9103781.8598261.533131e-08
0.9151351.8596271.578660e-08
0.9199171.859431.624427e-08
0.9247241.8592341.670432e-08
0.9295561.859041.716678e-08
0.9344131.8588471.763166e-08
0.9392951.8586551.809897e-08
0.9442041.8584651.856872e-08
0.9491371.8582751.904092e-08
0.9540971.8580871.951559e-08
0.9590821.8579011.999274e-08
0.9640931.8577152.047239e-08
0.9691311.8575312.095454e-08
0.9741951.8573472.143921e-08
0.9792851.8571652.192641e-08
0.9844021.8569842.241616e-08
0.9895461.8568042.290846e-08
0.9947171.8566252.340334e-08
0.9999141.8564482.390081e-08
11.8564452.390900e-08
1.005141.8562712.403188e-08
1.010391.8560952.415746e-08
1.015671.855922.428369e-08
1.020981.8557462.441058e-08
1.026311.8555732.453814e-08
1.031681.8554012.466636e-08
1.037071.855232.479525e-08
1.042491.8550592.492482e-08
1.047931.854892.505506e-08
1.053411.8547212.518599e-08
1.058911.8545532.531760e-08
1.064451.8543862.544989e-08
1.070011.8542192.558288e-08
1.07561.8540542.571656e-08
1.081221.8538892.585094e-08
1.086871.8537242.598602e-08
1.092551.8535612.612181e-08
1.098261.8533982.625831e-08
1.1041.8532362.639552e-08
1.109761.8530742.653345e-08
1.115561.8529132.667210e-08
1.121391.8527522.681147e-08
1.127251.8525922.695157e-08
1.133141.8524332.709241e-08
1.139061.8522742.723398e-08
1.145011.8521152.737628e-08
1.1511.8519572.751934e-08
1.157011.85182.766314e-08
1.163061.8516432.780769e-08
1.169131.8514862.795300e-08
1.175241.851332.809906e-08
1.181381.8511742.824589e-08
1.187561.8510182.839349e-08
1.193761.8508632.854186e-08
1.21.8507082.869100e-08
1.21.8507082.869100e-08
1.206271.8505542.954229e-08
1.212571.8503993.039802e-08
1.218911.8502453.125822e-08
1.225281.8500923.212292e-08
1.231681.8499383.299214e-08
1.238121.8497853.386590e-08
1.244591.8496323.474423e-08
1.251091.8494793.562714e-08
1.257631.8493263.651467e-08
1.26421.8491733.740683e-08
1.27081.8490213.830366e-08
1.277441.8488683.920518e-08
1.284121.8487164.011140e-08
1.290831.8485644.102236e-08
1.297571.8484124.193808e-08
1.304351.8482594.285858e-08
1.311171.8481074.378390e-08
1.318021.8479554.471405e-08
1.324911.8478034.564906e-08
1.331831.8476514.658895e-08
1.338791.8474984.753376e-08
1.345781.8473464.848350e-08
1.352821.8471934.943821e-08
1.359891.8470415.039790e-08
1.366991.8468885.136261e-08
1.374131.8467355.233236e-08
1.381311.8465825.330718e-08
1.388531.8464295.428709e-08
1.395791.8462765.527212e-08
1.41.8461875.584400e-08
1.403081.8461225.636155e-08
1.410411.8459685.759308e-08
1.417781.8458145.883105e-08
1.425191.8456596.007549e-08
1.432641.8455056.132643e-08
1.440121.8453496.258391e-08
1.447651.8451946.384795e-08
1.455211.8450386.511860e-08
1.462821.8448826.639590e-08
1.470461.8447266.767986e-08
1.478141.8445696.897054e-08
1.485871.8444117.026796e-08
1.493631.8442537.157215e-08
1.501441.8440957.288317e-08
1.509281.8439367.420103e-08
1.517171.8437777.552578e-08
1.525091.8436177.685745e-08
1.533061.8434577.819608e-08
1.541071.8432967.954170e-08
1.549131.8431348.089436e-08
1.557221.8429728.225408e-08
1.565361.842818.362091e-08
1.573541.8426468.499488e-08
1.581761.8424828.637603e-08
1.590021.8423188.776440e-08
1.598331.8421528.916002e-08
1.61.8421198.944000e-08
1.606681.8419869.223062e-08
1.615081.8418199.573524e-08
1.623521.8416519.925818e-08
1.6321.8414831.027995e-07
1.640531.8413141.063594e-07
1.64911.8411441.099378e-07
1.657721.8409731.135350e-07
1.666381.8408011.171509e-07
1.675091.8406281.207857e-07
1.683841.8404551.244396e-07
1.692641.840281.281125e-07
1.701481.8401051.318046e-07
1.710371.8399281.355160e-07
1.719311.8397511.392468e-07
1.72831.8395721.429971e-07
1.737331.8393931.467670e-07
1.74641.8392121.505566e-07
1.755531.8390311.543660e-07
1.76471.8388481.581953e-07
1.773921.8386641.620446e-07
1.783191.8384791.659140e-07
1.792511.8382931.698036e-07
1.81.8381431.729300e-07
1.801881.8381061.753955e-07
1.811291.8379171.877624e-07
1.820761.8377272.001939e-07
1.830271.8375362.126904e-07
1.839831.8373432.252522e-07
1.849451.837152.378796e-07
1.859111.8369552.505730e-07
1.868831.8367582.633328e-07
1.878591.836562.761592e-07
1.888411.8363612.890526e-07
1.898271.836163.020134e-07
1.908191.8359583.150419e-07
1.918161.8357543.281385e-07
1.928191.8355493.413036e-07
1.938261.8353423.545374e-07
1.948391.8351343.678403e-07
1.958571.8349243.812128e-07
1.96881.8347123.946552e-07
1.979091.8344994.081678e-07
1.989431.8342844.217510e-07
1.999831.8340674.354051e-07
21.8340644.356300e-07
2.010281.8338494.766033e-07
2.020781.8336295.184766e-07
2.031341.8334075.605688e-07
2.041961.8331836.028808e-07
2.052631.8329576.454140e-07
2.063351.832736.881694e-07
2.074131.83257.311483e-07
2.084971.8322697.743517e-07
2.095861.8320368.177808e-07
2.106821.83188.614369e-07
2.117821.8315639.053211e-07
2.128891.8313239.494346e-07
2.140011.8310829.937786e-07
2.15121.8308381.038354e-06
2.162441.8305921.083163e-06
2.173741.8303441.128206e-06
2.18511.8300931.173484e-06
2.196511.8298411.218998e-06
2.21.8297631.232900e-06
2.207991.8295861.363501e-06
2.219531.8293281.552083e-06
2.231121.8290691.741651e-06
2.242781.8288061.932210e-06
2.25451.8285422.123764e-06
2.266281.8282752.316319e-06
2.278121.8280052.509880e-06
2.290031.8277332.704453e-06
2.301991.8274582.900042e-06
2.314021.8271813.096653e-06
2.326111.8269013.294292e-06
2.338271.8266183.492963e-06
2.350491.8263323.692672e-06
2.362771.8260443.893425e-06
2.375111.8257534.095227e-06
2.387521.8254594.298084e-06
2.41.8251624.502000e-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
—