Optical constants

Refractive index of L-TIM28P (OHARA)

L-TIM28P: n,k 0.365–2.325 µm

Data
formula 2 + tabulated k
Range
0.365–2.325 µm
Temperature
298 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.365–2.325 µm
Refractive index n
1.69453
Extinction coefficient k
1.76522e-08
Permittivity ε1
2.87142
Permittivity ε2
5.98243e-08
Absorption coefficient α
0.00377509 cm⁻¹
Penetration depth δ = λ/(2πk)
5.29788e+09 nm
Abbe number Vd
30.656
Chromatic dispersion dn/dλ
-0.114099 µm⁻¹
Group index ng
1.76157
Group velocity dispersion
228.944 fs²/mm
Dispersion parameter D
-1249.01 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

# L-TIM28P (OHARA): L-TIM28P
ohara_l_tim28p = ls.fetch_refractiveindex("specs", "OHARA-optical", "L-TIM28P", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ohara_l_tim28p.range_nm)  # (365.015, 2325.42) nm
eps = ohara_l_tim28p.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=1.53013396λ2λ2−0.0114236857+0.24536228λ2λ2−0.0555101852+1.78233031λ2λ2−179.0743

Valid from 0.365015 to 2.32542 µm.

Coefficients as stored
CiValue
C10.0
C21.53013396
C30.0114236857
C40.24536228
C50.0555101852
C61.78233031
C7179.0743

Comments and conditions

Low Softening Temperature

Conditions

temperature
298 K

Properties

thermal dispersion
type: formula A, coefficients: -6.17e-06 5.7e-09 -3.8e-11 9.99e-07 1.21e-09 0.26
nd
1.694529
Vd
30.655992
glass code
689311
density
value: 2880
thermal expansion
value: 1.01e-05, temperature range: 243 343; value: 1.3e-05, temperature range: 293 573
dPgF
0.0073
resistance
acid: 1.0; climatic: 1.0; phosphate: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 298.0 K): dn/dT = -1.74e-06 K⁻¹ at 633 nm, dn/dT = -2.97e-06 K⁻¹ at 1310 nm, dn/dT = -3.05e-06 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 422 wavelengths, the same grid as the API and the library
L-TIM28P (OHARA), L-TIM28P: n and k versus wavelength
λ (µm)nk
0.3650151.7586642.983050e-06
0.3667131.7574642.479307e-06
0.3684191.7562861.973221e-06
0.371.7552161.504100e-06
0.3701331.7551281.492119e-06
0.3718541.7539891.336474e-06
0.3735841.752871.180105e-06
0.3753221.751771.023008e-06
0.3770681.7506898.651808e-07
0.3788221.7496257.066193e-07
0.381.7489236.001000e-07
0.3805841.7485795.835514e-07
0.3823541.747555.333725e-07
0.3841331.7465384.829602e-07
0.385921.7455424.323133e-07
0.3877151.7445623.814308e-07
0.3895181.7435983.303117e-07
0.391.7433433.166600e-07
0.391331.7426483.007366e-07
0.3931511.7417142.789471e-07
0.3949791.7407942.570563e-07
0.3968171.7398882.350636e-07
0.3986631.7389962.129685e-07
0.41.7383611.969600e-07
0.4005171.7381181.945890e-07
0.402381.7372531.860459e-07
0.4042521.7364011.774630e-07
0.4061321.7355611.688402e-07
0.4080221.7347341.601773e-07
0.409921.733921.514740e-07
0.4118261.7331171.427303e-07
0.4137421.7323261.339460e-07
0.4156671.7315461.251207e-07
0.41761.7307771.162544e-07
0.4195431.7300191.073469e-07
0.421.7298431.052500e-07
0.4214941.7292731.029386e-07
0.4234551.7285369.990572e-08
0.4254251.727819.685877e-08
0.4274041.7270949.379764e-08
0.4293921.7263889.072228e-08
0.4313891.7256928.763261e-08
0.4333961.7250058.452857e-08
0.4354121.7243288.141009e-08
0.4374371.723667.827711e-08
0.4394721.7230017.512955e-08
0.441.7228327.431300e-08
0.4415161.7223517.315522e-08
0.443571.7217097.158715e-08
0.4456341.7210767.001179e-08
0.4477061.7204516.842909e-08
0.4497891.7198356.683904e-08
0.4518811.7192266.524158e-08
0.4539831.7186266.363670e-08
0.4560951.7180336.202435e-08
0.4582171.7174486.040450e-08
0.461.7169655.904300e-08
0.4603481.7168715.881788e-08
0.462491.7163015.743358e-08
0.4646411.7157385.604283e-08
0.4668021.7151835.464562e-08
0.4689741.7146345.324191e-08
0.4711551.7140925.183167e-08
0.4733471.7135575.041487e-08
0.4755491.7130294.899147e-08
0.4777611.7125074.756146e-08
0.4799831.7119924.612480e-08
0.481.7119884.611400e-08
0.4822161.7114834.499025e-08
0.4844591.710984.385277e-08
0.4867131.7104844.270999e-08
0.4889771.7099934.156190e-08
0.4912511.7095094.040847e-08
0.4935361.709033.924967e-08
0.4958321.7085573.808549e-08
0.4981391.708093.691588e-08
0.51.7077183.597200e-08
0.5004561.7076283.576393e-08
0.5027841.7071723.470136e-08
0.5051231.7067213.363384e-08
0.5074721.7062753.256136e-08
0.5098331.7058353.148389e-08
0.5122041.70543.040140e-08
0.5145871.704972.931388e-08
0.5169811.7045452.822130e-08
0.5193861.7041252.712364e-08
0.5218021.7037092.602088e-08
0.5242291.7032992.491298e-08
0.5266671.7028932.379993e-08
0.5291171.7024922.268170e-08
0.5315791.7020952.155828e-08
0.5340511.7017032.042962e-08
0.5365361.7013151.929572e-08
0.5390311.7009321.815654e-08
0.5415391.7005531.701206e-08
0.5440581.7001781.586225e-08
0.5465891.6998071.470710e-08
0.5491311.6994411.354658e-08
0.551.6993171.315000e-08
0.5516861.6990781.335183e-08
0.5542521.698721.365911e-08
0.556831.6983651.396782e-08
0.559421.6980141.427797e-08
0.5620221.6976671.458957e-08
0.5646371.6973241.490261e-08
0.5672631.6969851.521711e-08
0.5699021.6966491.553307e-08
0.5725531.6963171.585050e-08
0.5752161.6959891.616941e-08
0.5778921.6956641.648980e-08
0.580581.6953421.681168e-08
0.5832811.6950241.713506e-08
0.5859941.6947091.745994e-08
0.588721.6943981.778634e-08
0.5914591.694091.811425e-08
0.594211.6937851.844369e-08
0.5969741.6934831.877466e-08
0.5997511.6931841.910717e-08
0.61.6931581.913700e-08
0.6025411.6928891.948208e-08
0.6053441.6925961.986276e-08
0.6081591.6923072.024521e-08
0.6109881.692022.062944e-08
0.613831.6917372.101546e-08
0.6166861.6914562.140327e-08
0.6195541.6911792.179289e-08
0.6224361.6909042.218431e-08
0.6253321.6906312.257756e-08
0.6282411.6903622.297264e-08
0.6311631.6900952.336956e-08
0.6340991.6898312.376832e-08
0.6370491.689572.416894e-08
0.6400121.6893112.457142e-08
0.6429891.6890552.497578e-08
0.645981.6888012.538201e-08
0.6489851.688552.579014e-08
0.651.6884662.592800e-08
0.6520041.6883012.555961e-08
0.6550371.6880552.500204e-08
0.6580841.6878112.444188e-08
0.6611451.6875692.387911e-08
0.664221.687332.331372e-08
0.667311.6870932.274570e-08
0.6704141.6868582.217504e-08
0.6735331.6866262.160173e-08
0.6766661.6863962.102575e-08
0.6798141.6861672.044708e-08
0.6829761.6859421.986573e-08
0.6861531.6857181.928167e-08
0.6893451.6854961.869490e-08
0.6925511.6852771.810540e-08
0.6957731.6850591.751315e-08
0.6990091.6848441.691815e-08
0.71.6847781.673600e-08
0.7022611.684631.650164e-08
0.7055271.6844191.616299e-08
0.7088091.6842091.582277e-08
0.7121061.6840011.548097e-08
0.7154191.6837951.513758e-08
0.7187471.6835911.479259e-08
0.722091.6833891.444599e-08
0.7254491.6831891.409778e-08
0.7288241.6829911.374796e-08
0.7322141.6827941.339650e-08
0.735621.6825991.304341e-08
0.7390421.6824061.268868e-08
0.742481.6822141.233230e-08
0.7459331.6820241.197426e-08
0.7494031.6818361.161455e-08
0.7528891.6816491.125318e-08
0.7563921.6814641.089012e-08
0.759911.6812811.052537e-08
0.7634451.6810991.015892e-08
0.7669961.6809199.790775e-09
0.7705641.680749.420913e-09
0.7741481.6805639.049331e-09
0.777751.6803878.676020e-09
0.7813671.6802138.300973e-09
0.7850021.680047.924181e-09
0.7886541.6798687.545636e-09
0.7923221.6796987.165331e-09
0.7960081.679536.783256e-09
0.7997111.6793626.399404e-09
0.81.6793496.369400e-09
0.8034311.6791966.396714e-09
0.8071681.6790326.426471e-09
0.8109231.6788696.456365e-09
0.8146951.6787076.486399e-09
0.8184841.6785466.516573e-09
0.8222921.6783876.546887e-09
0.8261171.6782286.577342e-09
0.829961.6780716.607938e-09
0.833821.6779166.638677e-09
0.8376991.6777616.669559e-09
0.8415961.6776086.700585e-09
0.8455111.6774556.731755e-09
0.8494441.6773046.763070e-09
0.8533951.6771546.794530e-09
0.8573651.6770056.826137e-09
0.8613531.6768586.857891e-09
0.865361.6767116.889793e-09
0.8693851.6765656.921843e-09
0.8734291.6764216.954042e-09
0.8774921.6762776.986391e-09
0.8815741.6761357.018890e-09
0.8856751.6759937.051541e-09
0.8897941.6758537.084343e-09
0.8939331.6757137.117298e-09
0.8980921.6755747.150407e-09
0.91.6755117.165600e-09
0.9022691.6754377.183667e-09
0.9064661.67537.217080e-09
0.9106831.6751647.250648e-09
0.9149191.6750297.284372e-09
0.9191751.6748957.318254e-09
0.9234511.6747627.352293e-09
0.9277471.674637.386490e-09
0.9320621.6744987.420846e-09
0.9363981.6743687.455362e-09
0.9407541.6742387.490039e-09
0.945131.6741097.524877e-09
0.9495261.6739817.559877e-09
0.9539431.6738537.595040e-09
0.958381.6737277.630367e-09
0.9628391.6736017.665857e-09
0.9673171.6734757.701513e-09
0.9718171.6733517.737335e-09
0.9763381.6732277.773323e-09
0.9808791.6731047.809479e-09
0.9854421.6729827.845803e-09
0.9900261.672867.882296e-09
0.9946311.6727397.918959e-09
0.9992581.6726197.955792e-09
11.67267.961700e-09
1.003911.6724997.992800e-09
1.008581.672388.029982e-09
1.013271.6722628.067336e-09
1.017981.6721448.104864e-09
1.022721.6720278.142567e-09
1.027471.671918.180445e-09
1.032251.6717948.218499e-09
1.037051.6716788.256730e-09
1.041881.6715638.295139e-09
1.046731.6714498.333727e-09
1.051591.6713358.372494e-09
1.056491.6712218.411442e-09
1.06141.6711098.450571e-09
1.066341.6709968.489881e-09
1.07131.6708848.529375e-09
1.076281.6707738.569052e-09
1.081291.6706628.608914e-09
1.086321.6705518.648962e-09
1.091371.6704418.689195e-09
1.096451.6703318.729616e-09
1.101551.6702228.770225e-09
1.106671.6701138.811022e-09
1.111821.6700058.852010e-09
1.116991.6698978.893188e-09
1.122191.6697898.934558e-09
1.127411.6696828.976120e-09
1.132651.6695759.017875e-09
1.137921.6694689.059825e-09
1.143211.6693629.101970e-09
1.148531.6692569.144311e-09
1.153871.669159.186848e-09
1.159241.6690459.229584e-09
1.164631.668949.272519e-09
1.170051.6688359.315653e-09
1.175491.668739.358988e-09
1.180961.6686269.402524e-09
1.186461.6685229.446263e-09
1.191981.6684189.490205e-09
1.197521.6683159.534352e-09
1.21.6682699.554100e-09
1.203091.6682129.751101e-09
1.208691.6681091.010787e-08
1.214311.6680061.046629e-08
1.219961.6679031.082639e-08
1.225631.6678011.118816e-08
1.231331.6676981.155161e-08
1.237061.6675961.191675e-08
1.242821.6674941.228359e-08
1.24861.6673921.265214e-08
1.254411.6672911.302240e-08
1.260241.6671891.339439e-08
1.26611.6670881.376810e-08
1.271991.6669861.414356e-08
1.277911.6668851.452075e-08
1.283851.6667841.489971e-08
1.289831.6666831.528043e-08
1.295831.6665821.566291e-08
1.301851.6664811.604718e-08
1.307911.666381.643324e-08
1.313991.6662791.682109e-08
1.320111.6661781.721074e-08
1.326251.6660781.760221e-08
1.332421.6659771.799550e-08
1.338611.6658761.839061e-08
1.344841.6657751.878757e-08
1.35111.6656741.918637e-08
1.357381.6655741.958703e-08
1.363691.6654731.998955e-08
1.370041.6653722.039394e-08
1.376411.6652712.080022e-08
1.382811.665172.120838e-08
1.389251.6650692.161844e-08
1.395711.6649682.203041e-08
1.41.6649012.230400e-08
1.40221.6648662.276086e-08
1.408721.6647652.411489e-08
1.415281.6646642.547521e-08
1.421861.6645622.684186e-08
1.428471.664462.821487e-08
1.435121.6643592.959427e-08
1.441791.6642573.098008e-08
1.44851.6641543.237234e-08
1.455241.6640523.377107e-08
1.462011.663953.517631e-08
1.468811.6638473.658809e-08
1.475641.6637443.800643e-08
1.482511.6636413.943138e-08
1.48941.6635384.086295e-08
1.496331.6634344.230118e-08
1.503291.6633314.374610e-08
1.510281.6632274.519774e-08
1.517311.6631224.665613e-08
1.524371.6630184.812131e-08
1.531461.6629134.959330e-08
1.538581.6628085.107215e-08
1.545741.6627035.255787e-08
1.552931.6625975.405050e-08
1.560151.6624915.555007e-08
1.567411.6623855.705662e-08
1.57471.6622785.857018e-08
1.582031.6621726.009078e-08
1.589391.6620646.161845e-08
1.596781.6619576.315323e-08
1.61.661916.382200e-08
1.604211.6618496.856559e-08
1.611671.661747.698145e-08
1.619171.6616318.543645e-08
1.62671.6615229.393079e-08
1.634261.6614131.024646e-07
1.641871.6613031.110382e-07
1.64951.6611921.196516e-07
1.657181.6610811.283051e-07
1.664891.660971.369989e-07
1.672631.6608581.457330e-07
1.680411.6607461.545079e-07
1.688231.6606331.633235e-07
1.696081.660521.721801e-07
1.703971.6604061.810780e-07
1.71191.6602921.900172e-07
1.719861.6601771.989980e-07
1.727861.6600612.080206e-07
1.73591.6599452.170852e-07
1.743971.6598292.261919e-07
1.752081.6597122.353410e-07
1.760231.6595942.445326e-07
1.768421.6594762.537670e-07
1.776651.6593572.630444e-07
1.784911.6592382.723649e-07
1.793221.6591182.817287e-07
1.81.6590192.893800e-07
1.801561.6589972.919275e-07
1.809941.6588753.056377e-07
1.818361.6587533.194116e-07
1.826821.6586313.332495e-07
1.835311.6585073.471519e-07
1.843851.6583833.611189e-07
1.852431.6582583.751509e-07
1.861041.6581333.892481e-07
1.86971.6580074.034109e-07
1.87841.6578794.176396e-07
1.887141.6577524.319345e-07
1.895911.6576234.462959e-07
1.904731.6574944.607241e-07
1.913591.6573644.752194e-07
1.92251.6572334.897822e-07
1.931441.6571015.044126e-07
1.940421.6569685.191112e-07
1.949451.6568355.338781e-07
1.958521.65675.487137e-07
1.967631.6565655.636183e-07
1.976781.6564295.785922e-07
1.985981.6562925.936358e-07
1.995211.6561546.087494e-07
21.6560836.165800e-07
2.004491.6560156.325478e-07
2.013821.6558766.656732e-07
2.023191.6557356.989527e-07
2.03261.6555937.323870e-07
2.042051.6554517.659768e-07
2.051551.6553077.997229e-07
2.061091.6551628.336259e-07
2.070681.6550168.676867e-07
2.080311.654879.019059e-07
2.089991.6547229.362843e-07
2.099711.6545739.708225e-07
2.109481.6544231.005522e-06
2.119291.6542721.040382e-06
2.129151.654121.075404e-06
2.139061.6539661.110590e-06
2.149011.6538121.145939e-06
2.1591.6536561.181452e-06
2.169051.6534991.217131e-06
2.179141.6533411.252976e-06
2.189271.6531821.288987e-06
2.199461.6530221.325166e-06
2.21.6530131.327100e-06
2.209691.652861.370618e-06
2.219971.6526971.416796e-06
2.230291.6525331.463188e-06
2.240671.6523671.509796e-06
2.251091.65221.556620e-06
2.261561.6520321.603663e-06
2.272081.6518631.650924e-06
2.282651.6516921.698405e-06
2.293271.651521.746108e-06
2.303941.6513461.794032e-06
2.314651.6511711.842178e-06
2.325421.6509941.890549e-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
—