Optical constants

Refractive index of S-TIM28 (OHARA)

S-TIM28: n,k 0.36–2.4 µm

Data
formula 2 + tabulated k
Range
0.36–2.4 µm
Temperature
298 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.36–2.4 µm
Refractive index n
1.68893
Extinction coefficient k
2.45299e-08
Permittivity ε1
2.85247
Permittivity ε2
8.28585e-08
Absorption coefficient α
0.00524595 cm⁻¹
Penetration depth δ = λ/(2πk)
3.81246e+09 nm
Abbe number Vd
31.075
Chromatic dispersion dn/dλ
-0.111629 µm⁻¹
Group index ng
1.75452
Group velocity dispersion
223.521 fs²/mm
Dispersion parameter D
-1219.42 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-TIM28 (OHARA): S-TIM28
ohara_s_tim28 = ls.fetch_refractiveindex("specs", "OHARA-optical", "S-TIM28", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ohara_s_tim28.range_nm)  # (360, 2400) nm
eps = ohara_s_tim28.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=1.5427081λ2λ2−0.0113925005+0.217113891λ2λ2−0.0579224572+1.81904459λ2λ2−167.697189

Valid from 0.36 to 2.4 µm.

Coefficients as stored
CiValue
C10.0
C21.5427081
C30.0113925005
C40.217113891
C50.0579224572
C61.81904459
C7167.697189

Comments and conditions

Recommended - Lightweight

Conditions

temperature
298 K

Properties

thermal dispersion
type: formula A, coefficients: -1.08e-06 1.07e-08 -3.65e-11 7.81e-07 1.09e-09 0.291
nd
1.688931
Vd
31.075450
glass code
689311
density
value: 2980
thermal expansion
value: 8.2e-06, temperature range: 243 343; value: 9.8e-06, temperature range: 293 573
dPgF
0.0092
resistance
acid: 1.0; climatic: 1.0; phosphate: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 298.0 K): dn/dT = 7.59e-07 K⁻¹ at 633 nm, dn/dT = -3.18e-07 K⁻¹ at 1310 nm, dn/dT = -3.91e-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 422 wavelengths, the same grid as the API and the library
S-TIM28 (OHARA), S-TIM28: n and k versus wavelength
λ (µm)nk
0.361.7557181.319300e-05
0.3617161.7544261.167186e-05
0.363441.7531591.014346e-05
0.3651721.7519168.607784e-06
0.3669121.7506967.064787e-06
0.3686611.7494985.514436e-06
0.371.74864.327300e-06
0.3704181.7483234.215266e-06
0.3721831.7471683.742118e-06
0.3739571.7460353.266714e-06
0.375741.7449222.789044e-06
0.377531.7438282.309097e-06
0.379331.7427531.826864e-06
0.381.7423591.647200e-06
0.3811381.7416971.543045e-06
0.3829541.7406591.376720e-06
0.3847791.7396391.209603e-06
0.3866131.7386361.041689e-06
0.3884561.737658.729749e-07
0.391.7368397.315700e-07
0.3903071.736687.216017e-07
0.3921671.7357266.612083e-07
0.3940361.7347876.005270e-07
0.3959141.7338645.395564e-07
0.3978011.7329564.782954e-07
0.3996971.7320624.167423e-07
0.41.7319214.069100e-07
0.4016021.7311823.877656e-07
0.4035161.7303163.648938e-07
0.4054391.7294643.419129e-07
0.4073721.7286253.188226e-07
0.4093131.7277982.956222e-07
0.4112641.7269852.723113e-07
0.4132241.7261842.488892e-07
0.4151931.7253942.253555e-07
0.4171721.7246172.017096e-07
0.4191611.7238511.779511e-07
0.421.7235321.679200e-07
0.4211581.7230971.643717e-07
0.4231661.7223531.582225e-07
0.4251821.7216211.520440e-07
0.4272091.7208991.458360e-07
0.4292451.7201871.395985e-07
0.4312911.7194861.333312e-07
0.4333461.7187941.270341e-07
0.4354111.7181131.207070e-07
0.4374871.7174411.143497e-07
0.4395721.7167781.079621e-07
0.441.7166441.066500e-07
0.4416671.7161251.045484e-07
0.4437721.7154811.018941e-07
0.4458871.7148459.922714e-08
0.4480121.7142199.654749e-08
0.4501471.71369.385508e-08
0.4522921.7129919.114983e-08
0.4544481.7123898.843169e-08
0.4566141.7117968.570059e-08
0.458791.711218.295648e-08
0.461.7108898.143100e-08
0.4609771.7106328.065263e-08
0.4631741.7100627.890193e-08
0.4653811.7094997.714290e-08
0.4675991.7089447.537547e-08
0.4698281.7083967.359963e-08
0.4720671.7078557.181532e-08
0.4743171.7073217.002250e-08
0.4765781.7067946.822115e-08
0.4788491.7062746.641120e-08
0.481.7060136.549400e-08
0.4811311.705766.473448e-08
0.4834241.7052536.319480e-08
0.4857281.7047526.164777e-08
0.4880431.7042576.009338e-08
0.4903691.7037695.853157e-08
0.4927061.7032865.696232e-08
0.4950551.702815.538560e-08
0.4974141.702345.380135e-08
0.4997851.7018755.220956e-08
0.51.7018335.206500e-08
0.5021671.7014165.095024e-08
0.504561.7009634.971887e-08
0.5069651.7005154.848164e-08
0.5093811.7000724.723850e-08
0.5118091.6996354.598944e-08
0.5142481.6992034.473443e-08
0.5166991.6987774.347344e-08
0.5191611.6983554.220644e-08
0.5216361.6979384.093339e-08
0.5241221.6975263.965429e-08
0.526621.6971193.836908e-08
0.529131.6967173.707775e-08
0.5316521.696323.578027e-08
0.5341851.6959273.447660e-08
0.5367311.6955393.316671e-08
0.5392891.6951553.185059e-08
0.541861.6947763.052819e-08
0.5444421.6944012.919949e-08
0.5470371.694032.786446e-08
0.5496441.6936632.652306e-08
0.551.6936142.634000e-08
0.5522641.6933012.623102e-08
0.5548961.6929422.610431e-08
0.5575411.6925882.597700e-08
0.5601981.6922382.584908e-08
0.5628681.6918912.572055e-08
0.565551.6915492.559141e-08
0.5682461.691212.546165e-08
0.5709541.6908752.533127e-08
0.5736751.6905442.520028e-08
0.5764091.6902162.506866e-08
0.5791561.6898922.493641e-08
0.5819171.6895712.480353e-08
0.584691.6892542.467002e-08
0.5874771.688942.453587e-08
0.5902771.688632.440108e-08
0.593091.6883232.426565e-08
0.5959171.6880192.412957e-08
0.5987571.6877192.399285e-08
0.61.6875892.393300e-08
0.601611.6874212.416478e-08
0.6044781.6871272.457744e-08
0.6073591.6868362.499207e-08
0.6102531.6865482.540867e-08
0.6131621.6862632.582725e-08
0.6160841.6859812.624784e-08
0.619021.6857022.667042e-08
0.6219711.6854262.709502e-08
0.6249351.6851522.752165e-08
0.6279131.6848822.795031e-08
0.6309061.6846142.838101e-08
0.6339131.6843492.881376e-08
0.6369341.6840862.924858e-08
0.639971.6838272.968547e-08
0.643021.683573.012444e-08
0.6460851.6833153.056550e-08
0.6491641.6830633.100866e-08
0.651.6829953.112900e-08
0.6522581.6828133.098419e-08
0.6553661.6825663.078480e-08
0.658491.6823223.058446e-08
0.6616281.682083.038316e-08
0.6647821.681843.018091e-08
0.667951.6816022.997769e-08
0.6711331.6813672.977350e-08
0.6743321.6811342.956834e-08
0.6775461.6809042.936220e-08
0.6807751.6806752.915508e-08
0.684021.6804492.894698e-08
0.687281.6802252.873788e-08
0.6905551.6800032.852778e-08
0.6938471.6797832.831668e-08
0.6971531.6795652.810458e-08
0.71.679382.792200e-08
0.7004761.679352.784975e-08
0.7038151.6791362.734307e-08
0.7071691.6789242.683398e-08
0.7105391.6787142.632245e-08
0.7139261.6785062.580849e-08
0.7173281.67832.529209e-08
0.7207471.6780962.477322e-08
0.7241821.6778942.425187e-08
0.7276341.6776942.372804e-08
0.7311021.6774952.320172e-08
0.7345861.6772982.267289e-08
0.7380871.6771032.214153e-08
0.7416051.676912.160765e-08
0.7451391.6767182.107122e-08
0.7486911.6765282.053223e-08
0.7522591.676341.999068e-08
0.7558441.6761531.944654e-08
0.7594461.6759681.889981e-08
0.7630661.6757851.835047e-08
0.7667031.6756031.779852e-08
0.7703571.6754221.724393e-08
0.7740281.6752431.668671e-08
0.7777171.6750661.612682e-08
0.7814241.674891.556427e-08
0.7851481.6747161.499904e-08
0.788891.6745431.443111e-08
0.792651.6743711.386048e-08
0.7964281.6742011.328713e-08
0.81.6740421.274500e-08
0.8002241.6740321.274856e-08
0.8040381.6738651.280932e-08
0.807871.6736991.287036e-08
0.811721.6735341.293170e-08
0.8155891.6733711.299333e-08
0.8194761.6732081.305525e-08
0.8233811.6730471.311747e-08
0.8273061.6728881.317998e-08
0.8312491.6727291.324279e-08
0.835211.6725721.330590e-08
0.8391911.6724161.336931e-08
0.8431911.6722611.343303e-08
0.8472091.6721071.349704e-08
0.8512471.6719551.356136e-08
0.8553041.6718031.362599e-08
0.859381.6716531.369093e-08
0.8634761.6715031.375618e-08
0.8675921.6713551.382173e-08
0.8717271.6712081.388760e-08
0.8758811.6710621.395379e-08
0.8800561.6709171.402029e-08
0.884251.6707731.408710e-08
0.8884641.670631.415424e-08
0.8926991.6704871.422169e-08
0.8969531.6703461.428947e-08
0.91.6702461.433800e-08
0.9012281.6702061.435757e-08
0.9055241.6700671.442599e-08
0.9098391.6699281.449474e-08
0.9141761.6697911.456382e-08
0.9185331.6696541.463322e-08
0.922911.6695181.470296e-08
0.9273091.6693831.477303e-08
0.9317281.6692491.484343e-08
0.9361691.6691161.491417e-08
0.9406311.6689831.498525e-08
0.9451141.6688521.505666e-08
0.9496181.6687211.512842e-08
0.9541441.6685911.520052e-08
0.9586921.6684611.527296e-08
0.9632611.6683331.534574e-08
0.9678521.6682051.541888e-08
0.9724641.6680781.549236e-08
0.9770991.6679511.556619e-08
0.9817561.6678251.564037e-08
0.9864351.66771.571491e-08
0.9911371.6675761.578980e-08
0.995861.6674521.586505e-08
11.6673441.593100e-08
1.000611.6673281.594067e-08
1.005381.6672061.601666e-08
1.010171.6670841.609301e-08
1.014981.6669621.616973e-08
1.019821.6668421.624682e-08
1.024681.6667211.632427e-08
1.029561.6666021.640209e-08
1.034471.6664831.648028e-08
1.03941.6663641.655884e-08
1.044351.6662461.663778e-08
1.049331.6661281.671710e-08
1.054331.6660111.679679e-08
1.059361.6658941.687686e-08
1.064411.6657781.695732e-08
1.069481.6656631.703815e-08
1.074581.6655471.711938e-08
1.07971.6654321.720099e-08
1.084841.6653181.728299e-08
1.090011.6652041.736538e-08
1.095211.6650911.744816e-08
1.100431.6649771.753134e-08
1.105671.6648641.761491e-08
1.110941.6647521.769888e-08
1.116241.664641.778325e-08
1.121561.6645281.786803e-08
1.12691.6644171.795321e-08
1.132271.6643061.803879e-08
1.137671.6641951.812478e-08
1.143091.6640841.821118e-08
1.148541.6639741.829800e-08
1.154011.6638641.838523e-08
1.159511.6637551.847287e-08
1.165041.6636451.856093e-08
1.170591.6635361.864941e-08
1.176171.6634271.873831e-08
1.181781.6633181.882764e-08
1.187411.663211.891739e-08
1.193071.6631011.900757e-08
1.198761.6629931.909818e-08
1.21.662971.911800e-08
1.204471.6628851.968864e-08
1.210211.6627782.042156e-08
1.215981.662672.115797e-08
1.221771.6625622.189789e-08
1.22761.6624552.264134e-08
1.233451.6623482.338833e-08
1.239331.6622412.413888e-08
1.245231.6621342.489301e-08
1.251171.6620272.565074e-08
1.257131.661922.641207e-08
1.263121.6618132.717704e-08
1.269141.6617072.794565e-08
1.275191.66162.871792e-08
1.281271.6614932.949387e-08
1.287371.6613873.027352e-08
1.293511.661283.105689e-08
1.299671.6611743.184399e-08
1.305871.6610673.263485e-08
1.312091.660963.342947e-08
1.318351.6608543.422788e-08
1.324631.6607473.503009e-08
1.330941.6606413.583613e-08
1.337291.6605343.664601e-08
1.343661.6604273.745974e-08
1.350061.660323.827736e-08
1.35651.6602133.909887e-08
1.362961.6601063.992430e-08
1.369461.6599994.075367e-08
1.375991.6598924.158698e-08
1.382541.6597844.242427e-08
1.389131.6596774.326555e-08
1.395751.6595694.411084e-08
1.41.65954.465300e-08
1.402411.6594614.472973e-08
1.409091.6593534.494291e-08
1.415811.6592454.515711e-08
1.422551.6591374.537233e-08
1.429331.6590284.558858e-08
1.436151.6589194.580585e-08
1.442991.658814.602416e-08
1.449871.6587014.624351e-08
1.456781.6585914.646391e-08
1.463721.6584824.668536e-08
1.47071.6583724.690786e-08
1.477711.6582614.713142e-08
1.484751.6581514.735605e-08
1.491821.658044.758175e-08
1.498931.6579294.780853e-08
1.506081.6578174.803638e-08
1.513261.6577054.826532e-08
1.520471.6575934.849536e-08
1.527721.657484.872649e-08
1.5351.6573674.895872e-08
1.542311.6572544.919206e-08
1.549661.657144.942651e-08
1.557051.6570264.966207e-08
1.564471.6569124.989876e-08
1.571931.6567975.013658e-08
1.579421.6566815.037553e-08
1.586951.6565665.061562e-08
1.594511.6564495.085686e-08
1.61.6563655.103200e-08
1.602111.6563335.216417e-08
1.609741.6562155.626483e-08
1.617421.6560986.038503e-08
1.625121.6559796.452486e-08
1.632871.6558616.868443e-08
1.640651.6557417.286382e-08
1.648471.6556227.706313e-08
1.656331.6555018.128245e-08
1.664221.655388.552189e-08
1.672151.6552598.978152e-08
1.680121.6551379.406146e-08
1.688131.6550149.836180e-08
1.696181.6548911.026826e-07
1.704261.6547671.070241e-07
1.712381.6546421.113862e-07
1.720541.6545171.157691e-07
1.728741.6543911.201729e-07
1.736981.6542651.245977e-07
1.745261.6541381.290435e-07
1.753581.654011.335106e-07
1.761941.6538811.379990e-07
1.770331.6537521.425087e-07
1.778771.6536221.470399e-07
1.787251.6534911.515928e-07
1.795771.6533591.561673e-07
1.81.6532941.584400e-07
1.804331.6532271.609160e-07
1.812931.6530941.658370e-07
1.821571.652961.707815e-07
1.830251.6528251.757495e-07
1.838971.6526891.807413e-07
1.847741.6525531.857568e-07
1.856541.6524151.907962e-07
1.865391.6522771.958596e-07
1.874281.6521382.009472e-07
1.883211.6519982.060590e-07
1.892191.6518572.111952e-07
1.901211.6517152.163559e-07
1.910271.6515732.215411e-07
1.919371.6514292.267511e-07
1.928521.6512842.319859e-07
1.937711.6511382.372456e-07
1.946951.6509922.425304e-07
1.956231.6508442.478404e-07
1.965551.6506952.531758e-07
1.974921.6505452.585365e-07
1.984331.6503942.639228e-07
1.993791.6502422.693347e-07
21.6501422.728900e-07
2.003291.6500892.798568e-07
2.012841.6499353.000769e-07
2.022431.649783.203934e-07
2.032071.6496233.408067e-07
2.041751.6494663.613173e-07
2.051491.6493073.819256e-07
2.061261.6491474.026322e-07
2.071091.6489854.234374e-07
2.080961.6488234.443418e-07
2.090881.6486594.653459e-07
2.100841.6484944.864500e-07
2.110851.6483285.076548e-07
2.120911.648165.289606e-07
2.131021.6479915.503679e-07
2.141181.6478215.718773e-07
2.151381.647655.934892e-07
2.161641.6474776.152040e-07
2.171941.6473026.370224e-07
2.182291.6471276.589448e-07
2.192691.6469496.809716e-07
2.21.6468246.964500e-07
2.203141.6467717.015309e-07
2.213641.6465917.185123e-07
2.224191.6464097.355747e-07
2.234791.6462267.527184e-07
2.245441.6460417.699438e-07
2.256151.6458557.872513e-07
2.26691.6456678.046412e-07
2.27771.6454788.221141e-07
2.288561.6452878.396702e-07
2.299471.6450948.573100e-07
2.310421.64498.750339e-07
2.321441.6447048.928423e-07
2.33251.6445079.107355e-07
2.343621.6443079.287140e-07
2.354791.6441069.467782e-07
2.366011.6439039.649285e-07
2.377291.6436999.831653e-07
2.388621.6434921.001489e-06
2.41.6432841.019900e-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
—