Optical constants

Refractive index of N-PK52A (SCHOTT)

N-PK52A: n,k 0.29–2.5 µm

Data
formula 2 + tabulated k
Range
0.29–2.5 µm
Temperature
293 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.29–2.5 µm
Refractive index n
1.497
Extinction coefficient k
6.37255e-09
Permittivity ε1
2.24101
Permittivity ε2
1.90794e-08
Absorption coefficient α
0.00136283 cm⁻¹
Penetration depth δ = λ/(2πk)
1.46754e+10 nm
Abbe number Vd
81.61
Chromatic dispersion dn/dλ
-0.0315391 µm⁻¹
Group index ng
1.51553
Group velocity dispersion
54.5707 fs²/mm
Dispersion parameter D
-297.712 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

# N-PK52A (SCHOTT): N-PK52A
schott_n_pk52a = ls.fetch_refractiveindex("specs", "SCHOTT-optical", "N-PK52A", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(schott_n_pk52a.range_nm)  # (290, 2500) nm
eps = schott_n_pk52a.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=1.029607λ2λ2−0.00516800155+0.1880506λ2λ2−0.0166658798+0.736488165λ2λ2−138.964129

Valid from 0.29 to 2.5 µm.

Coefficients as stored
CiValue
C10.0
C21.029607
C30.00516800155
C40.1880506
C50.0166658798
C60.736488165
C7138.964129

Comments and conditions

suitable for precision molding

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: -1.97e-05 -5.5e-09 5.28e-12 3.6e-07 2.45e-10 0.172
nd
1.497
Vd
81.61
glass code
497816.370
glass status
standard
density
value: 3700
thermal expansion
value: 1.301e-05, temperature range: 243 343; value: 1.5e-05, temperature range: 293 573
dPgF
0.0311
resistance
acid: 52.3; stain: 0.0; alkali: 3.3; climatic: 1.0; phosphate: 4.3

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = -7.75e-06 K⁻¹ at 633 nm, dn/dT = -7.95e-06 K⁻¹ at 1310 nm, dn/dT = -7.95e-06 K⁻¹ at 1550 nm

References

Cite

SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com); See also SCHOTT 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 424 wavelengths, the same grid as the API and the library
N-PK52A (SCHOTT), N-PK52A: n and k versus wavelength
λ (µm)nk
0.291.5267944.251000e-06
0.291571.5263364.066189e-06
0.2931481.5258853.880378e-06
0.2947351.525443.693561e-06
0.2963311.5250013.505732e-06
0.2979351.5245673.316887e-06
0.2995481.524143.127020e-06
0.31.5240213.073800e-06
0.301171.5237182.959000e-06
0.30281.5233012.798961e-06
0.3044391.522892.638057e-06
0.3060871.5224852.476281e-06
0.3077441.5220852.313629e-06
0.309411.521692.150097e-06
0.311.5215512.092200e-06
0.3110851.52131.998245e-06
0.3127691.5209151.852439e-06
0.3144621.5205351.705844e-06
0.3161651.520161.558455e-06
0.3178761.519791.410268e-06
0.3195971.5194251.261279e-06
0.321.519341.226400e-06
0.3213271.5190641.156700e-06
0.3230671.5187081.065353e-06
0.3248161.5183579.735123e-07
0.3265741.518018.811741e-07
0.3283421.5176677.883359e-07
0.330121.5173296.949952e-07
0.3319071.5169956.011492e-07
0.3337031.5166655.067952e-07
0.3341.5166114.912200e-07
0.335511.5163394.583040e-07
0.3373261.5160184.187089e-07
0.3391521.51573.788995e-07
0.3409881.5153873.388746e-07
0.3428341.5150772.986331e-07
0.344691.5147712.581736e-07
0.3465561.5144692.174952e-07
0.3484321.5141711.765965e-07
0.351.5139261.424200e-07
0.3503191.5138761.401473e-07
0.3522151.5135851.266152e-07
0.3541221.5132981.130099e-07
0.3560391.5130149.933088e-08
0.3579661.5127338.557784e-08
0.3599041.5124567.175035e-08
0.3618521.5121835.784801e-08
0.3638111.5119134.387041e-08
0.3651.5117513.538800e-08
0.3657811.5116463.357765e-08
0.3677611.5113822.898606e-08
0.3697521.5111212.436961e-08
0.371.5110892.379400e-08
0.3717531.5108642.196781e-08
0.3737661.5106091.987180e-08
0.3757891.5103581.776445e-08
0.3778241.510111.564568e-08
0.3798691.5098651.351545e-08
0.381.5098491.337900e-08
0.3819251.5096221.272286e-08
0.3839931.5093831.201828e-08
0.3860721.5091461.130988e-08
0.3881621.5089121.059765e-08
0.391.508719.971200e-09
0.3902631.5086819.977929e-09
0.3923761.5084531.003197e-08
0.39451.5082271.008631e-08
0.3966351.5080041.014094e-08
0.3987831.5077841.019586e-08
0.41.5076611.022700e-08
0.4009411.5075661.025110e-08
0.4031121.5073511.030667e-08
0.4051.5071661.035500e-08
0.4052941.5071381.041544e-08
0.4074881.5069281.086610e-08
0.4096941.506721.131920e-08
0.4119121.5065151.177475e-08
0.4141421.5063121.223277e-08
0.4163841.5061111.269327e-08
0.4186381.5059131.315626e-08
0.421.5057941.343600e-08
0.4209041.5057171.346494e-08
0.4231831.5055231.353785e-08
0.4254741.5053311.361116e-08
0.4277771.5051421.368487e-08
0.4300931.5049551.375897e-08
0.4324211.5047691.383348e-08
0.4347621.5045861.390839e-08
0.4361.5044911.394800e-08
0.4371161.5044061.384633e-08
0.4394821.5042271.363069e-08
0.4418611.504051.341389e-08
0.4442531.5038751.319592e-08
0.4466581.5037021.297677e-08
0.4490761.5035311.275643e-08
0.4515071.5033621.253490e-08
0.4539521.5031951.231217e-08
0.4564091.503031.208823e-08
0.458881.5028671.186308e-08
0.461.5027931.176100e-08
0.4613641.5027051.157748e-08
0.4638621.5025451.124143e-08
0.4663731.5023871.090356e-08
0.4688971.5022311.056386e-08
0.4714361.5020761.022232e-08
0.4739881.5019249.878932e-09
0.4765541.5017729.533685e-09
0.4791341.5016239.186569e-09
0.4817271.5014758.837574e-09
0.4843351.5013298.486689e-09
0.4869571.5011848.133906e-09
0.4895931.5010417.779212e-09
0.4922441.50097.422598e-09
0.4949091.500767.064054e-09
0.4975881.5006216.703568e-09
0.51.5004986.379000e-09
0.5002811.5004846.371920e-09
0.502991.5003496.303789e-09
0.5057131.5002146.235289e-09
0.508451.5000826.166419e-09
0.5112031.4999516.097175e-09
0.513971.4998216.027557e-09
0.5167531.4996925.957562e-09
0.519551.4995655.887188e-09
0.5223631.4994395.816433e-09
0.525191.4993155.745295e-09
0.5280341.4991925.673772e-09
0.5308921.499075.601862e-09
0.5337661.4989495.529562e-09
0.5366561.498835.456871e-09
0.5395611.4987125.383787e-09
0.5424821.4985955.310306e-09
0.5454191.498485.236428e-09
0.5461.4984575.221800e-09
0.5483711.4983655.244472e-09
0.551341.4982525.272857e-09
0.5543241.498145.301396e-09
0.5573251.4980295.330090e-09
0.5603421.4979195.358938e-09
0.5633761.497815.387943e-09
0.5664261.4977035.417105e-09
0.5694921.4975965.446425e-09
0.5725751.4974915.475903e-09
0.5756751.4973865.505541e-09
0.5787911.4972835.535340e-09
0.581.4972435.546900e-09
0.5819241.497185.755947e-09
0.5850751.4970796.098183e-09
0.5882421.4969796.442271e-09
0.5914261.4968796.788222e-09
0.5946281.4967817.136046e-09
0.5978471.4966837.485753e-09
0.6010831.4965877.837353e-09
0.6043371.4964918.190856e-09
0.6076091.4963978.546273e-09
0.6108981.4963038.903614e-09
0.6142051.496219.262890e-09
0.617531.4961189.624110e-09
0.621.4960519.892400e-09
0.6208731.4960279.998643e-09
0.6242351.4959371.040749e-08
0.6276141.4958481.081855e-08
0.6310111.4957591.123183e-08
0.6344271.4956711.164735e-08
0.6378621.4955841.206512e-08
0.6413151.4954981.248515e-08
0.6447871.4954131.290746e-08
0.6482771.4953291.333205e-08
0.6517871.4952451.375894e-08
0.6553151.4951621.418814e-08
0.6588631.495081.461966e-08
0.661.4950531.475800e-08
0.662431.4949981.481230e-08
0.6660161.4949171.489245e-08
0.6696211.4948371.497303e-08
0.6732461.4947581.505405e-08
0.6768911.4946791.513551e-08
0.6805551.4946011.521741e-08
0.6842391.4945241.529975e-08
0.6879431.4944471.538253e-08
0.6916681.4943711.546577e-08
0.6954121.4942961.554946e-08
0.6991771.4942211.563360e-08
0.71.4942051.565200e-08
0.7029621.4941471.569028e-08
0.7067671.4940731.573946e-08
0.7105931.4941.578892e-08
0.714441.4939281.583864e-08
0.7183081.4938561.588862e-08
0.7221961.4937851.593888e-08
0.7261061.4937151.598942e-08
0.7300361.4936451.604022e-08
0.7339891.4935751.609130e-08
0.7379621.4935061.614266e-08
0.7419571.4934381.619429e-08
0.7459741.493371.624621e-08
0.7500121.4933031.629840e-08
0.7540721.4932361.635088e-08
0.7581541.4931691.640364e-08
0.7622591.4931041.645669e-08
0.7663851.4930381.651003e-08
0.7705341.4929731.656365e-08
0.7747051.4929091.661756e-08
0.7788991.4928451.667177e-08
0.7831161.4927811.672627e-08
0.7873551.4927181.678106e-08
0.7916171.4926561.683615e-08
0.7959031.4925931.689154e-08
0.8002111.4925321.694723e-08
0.8045431.492471.700322e-08
0.8088991.4924091.705952e-08
0.8132781.4923491.711612e-08
0.817681.4922881.717302e-08
0.8221071.4922291.723023e-08
0.8265571.4921691.728776e-08
0.8310321.492111.734559e-08
0.8355311.4920511.740374e-08
0.8400541.4919931.746220e-08
0.8446021.4919351.752098e-08
0.8491741.4918771.758007e-08
0.8537711.491821.763949e-08
0.8583931.4917631.769923e-08
0.863041.4917061.775929e-08
0.8677121.4916491.781968e-08
0.8724091.4915931.788039e-08
0.8771321.4915371.794143e-08
0.881881.4914821.800280e-08
0.8866541.4914271.806451e-08
0.8914541.4913721.812655e-08
0.896281.4913171.818892e-08
0.9011321.4912621.825163e-08
0.9060111.4912081.831469e-08
0.9109151.4911541.837808e-08
0.9158461.49111.844182e-08
0.9208041.4910471.850590e-08
0.9257891.4909941.857033e-08
0.9308011.4909411.863510e-08
0.935841.4908881.870023e-08
0.9409061.4908351.876571e-08
0.9461.4907831.883155e-08
0.9511211.490731.889774e-08
0.956271.4906781.896429e-08
0.9614471.4906261.903120e-08
0.9666511.4905751.909847e-08
0.9718841.4905231.916610e-08
0.9771461.4904721.923411e-08
0.9824351.4904211.930248e-08
0.9877541.4903691.937122e-08
0.9931011.4903181.944033e-08
0.9984771.4902681.950982e-08
1.003881.4902171.957968e-08
1.009321.4901661.964992e-08
1.014781.4901161.972054e-08
1.020271.4900661.979155e-08
1.02581.4900161.986294e-08
1.031351.4899651.993471e-08
1.036931.4899152.000687e-08
1.042551.4898652.007943e-08
1.048191.4898162.015237e-08
1.053871.4897662.022572e-08
1.059571.4897162.029945e-08
1.061.4897122.030500e-08
1.065311.4896662.040667e-08
1.071071.4896172.051715e-08
1.076871.4895672.062823e-08
1.08271.4895182.073991e-08
1.088561.4894682.085220e-08
1.094461.4894192.096509e-08
1.100381.489372.107860e-08
1.106341.489322.119271e-08
1.112331.4892712.130745e-08
1.118351.4892212.142281e-08
1.12441.4891722.153879e-08
1.130491.4891232.165540e-08
1.136611.4890732.177265e-08
1.142761.4890242.189052e-08
1.148951.4889752.200904e-08
1.155171.4889252.212819e-08
1.161421.4888762.224800e-08
1.167711.4888262.236845e-08
1.174031.4887772.248955e-08
1.180391.4887272.261131e-08
1.186781.4886772.273372e-08
1.19321.4886282.285680e-08
1.199661.4885782.298055e-08
1.206161.4885282.310496e-08
1.212681.4884782.323005e-08
1.219251.4884282.335582e-08
1.225851.4883782.348227e-08
1.232491.4883282.360940e-08
1.239161.4882772.373722e-08
1.245871.4882272.386573e-08
1.252611.4881762.399494e-08
1.259391.4881252.412484e-08
1.266211.4880752.425545e-08
1.273061.4880242.438677e-08
1.279961.4879732.451880e-08
1.286891.4879212.465154e-08
1.293851.487872.478500e-08
1.300861.4878182.491919e-08
1.30791.4877662.505410e-08
1.314981.4877142.518974e-08
1.32211.4876622.532612e-08
1.329251.487612.546323e-08
1.336451.4875572.560108e-08
1.343691.4875052.573969e-08
1.350961.4874522.587904e-08
1.358271.4873992.601915e-08
1.365631.4873452.616001e-08
1.373021.4872922.630164e-08
1.380451.4872382.644403e-08
1.387921.4871842.658720e-08
1.395441.4871292.673114e-08
1.402991.4870752.687586e-08
1.410591.487022.702136e-08
1.418221.4869652.716765e-08
1.42591.486912.731473e-08
1.433621.4868542.746261e-08
1.441381.4867982.761129e-08
1.449181.4867422.776078e-08
1.457031.4866852.791107e-08
1.464921.4866282.806218e-08
1.472851.4865712.821410e-08
1.480821.4865132.836685e-08
1.488841.4864562.852042e-08
1.49691.4863972.867483e-08
1.5051.4863392.883007e-08
1.513151.486282.898615e-08
1.521341.4862212.914308e-08
1.529581.4861612.930086e-08
1.531.4861582.930900e-08
1.537861.4861012.991090e-08
1.546181.486043.054880e-08
1.554551.485983.119015e-08
1.562971.4859183.183498e-08
1.571431.4858573.248329e-08
1.579931.4857953.313512e-08
1.588491.4857323.379047e-08
1.597091.4856693.444937e-08
1.605731.4856063.511184e-08
1.614431.4855423.577789e-08
1.623161.4854783.644755e-08
1.631951.4854133.712084e-08
1.640791.4853483.779777e-08
1.649671.4852833.847837e-08
1.65861.4852163.916264e-08
1.667581.485153.985063e-08
1.676611.4850834.054234e-08
1.685681.4850154.123779e-08
1.694811.4849474.193701e-08
1.703981.4848784.264001e-08
1.713211.4848094.334682e-08
1.722481.4847394.405745e-08
1.731811.4846684.477193e-08
1.741181.4845974.549028e-08
1.750611.4845264.621252e-08
1.760081.4844544.693867e-08
1.769611.4843814.766875e-08
1.779191.4843074.840278e-08
1.788821.4842334.914079e-08
1.798511.4841594.988279e-08
1.808241.4840845.062880e-08
1.818031.4840085.137886e-08
1.827871.4839315.213298e-08
1.837771.4838545.289117e-08
1.847721.4837765.365348e-08
1.857721.4836975.441991e-08
1.867781.4836185.519049e-08
1.877891.4835385.596524e-08
1.888061.4834575.674418e-08
1.898281.4833765.752734e-08
1.908551.4832945.831474e-08
1.918881.4832115.910641e-08
1.929271.4831275.990236e-08
1.939721.4830426.070262e-08
1.950221.4829576.150721e-08
1.960771.4828716.231615e-08
1.971.4827956.302300e-08
1.971391.4827846.342074e-08
1.982061.4826966.647528e-08
1.992791.4826086.954637e-08
2.003581.4825187.263407e-08
2.014431.4824287.573850e-08
2.025331.4823377.885972e-08
2.03631.4822458.199785e-08
2.047321.4821528.515296e-08
2.05841.4820588.832516e-08
2.069551.4819639.151452e-08
2.080751.4818679.472116e-08
2.092011.4817719.794515e-08
2.103341.4816731.011866e-07
2.114721.4815741.044456e-07
2.126171.4814751.077222e-07
2.137681.4813741.110166e-07
2.149251.4812731.143288e-07
2.160891.481171.176589e-07
2.172591.4810661.210071e-07
2.184351.4809611.243734e-07
2.196171.4808551.277579e-07
2.208061.4807481.311607e-07
2.220021.480641.345820e-07
2.232031.4805311.380218e-07
2.244121.4804211.414802e-07
2.256271.4803091.449573e-07
2.268481.4801971.484532e-07
2.280761.4800831.519681e-07
2.293111.4799681.555020e-07
2.305521.4798511.590550e-07
2.3181.4797341.626273e-07
2.3251.4796681.646300e-07
2.330551.4796151.678787e-07
2.343171.4794951.752618e-07
2.355851.4793731.826850e-07
2.368611.4792511.901483e-07
2.381431.4791271.976520e-07
2.394321.4790012.051963e-07
2.407281.4788752.127815e-07
2.420311.4787462.204077e-07
2.433421.4786172.280753e-07
2.446591.4784862.357843e-07
2.459831.4783532.435350e-07
2.473151.478222.513278e-07
2.486541.4780842.591627e-07
2.51.4779472.670400e-07

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
—