Optical constants

Refractive index of H-LAF52 (CDGM)

H-LAF52: n,k 0.302–2.325 µm

Data
formula 2 + tabulated k
Range
0.302–2.325 µm
Temperature
293 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength. Note: k data cover 320-2400 nm only; k = 0 elsewhere in the n range 302-2325 nm.

At one wavelength

Range 0.302–2.325 µm
Refractive index n
1.7859
Extinction coefficient k
2.45299e-08
Permittivity ε1
3.18943
Permittivity ε2
8.76159e-08
Absorption coefficient α
0.00524595 cm⁻¹
Penetration depth δ = λ/(2πk)
3.81246e+09 nm
Abbe number Vd
44.187
Chromatic dispersion dn/dλ
-0.0910558 µm⁻¹
Group index ng
1.8394
Group velocity dispersion
168.502 fs²/mm
Dispersion parameter D
-919.266 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

# H-LAF52 (CDGM): H-LAF52
cdgm_h_laf52 = ls.fetch_refractiveindex("specs", "CDGM-optical", "H-LAF52", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cdgm_h_laf52.range_nm)  # (302, 2325) nm
eps = cdgm_h_laf52.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=0.225893751λ2λ2−0.0391551736+1.88248028λ2λ2−0.0100951886+1.11307009λ2λ2−85.0042906

Valid from 0.302 to 2.325 µm.

Coefficients as stored
CiValue
C10.0
C20.225893751
C30.0391551736
C41.88248028
C50.0100951886
C61.11307009
C785.0042906

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: 7.32e-06 1.67e-08 -2.76e-11 7.23e-07 7.76e-10 0.219
nd
1.785900
Vd
44.187159
glass code
786442
density
value: 4390
thermal expansion
value: 5.9e-06, temperature range: 243 343; value: 7.2e-06, temperature range: 293 573
dPgF
-0.0083
resistance
climatic: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = 5.72e-06 K⁻¹ at 633 nm, dn/dT = 4.63e-06 K⁻¹ at 1310 nm, dn/dT = 4.53e-06 K⁻¹ at 1550 nm
Notes on the source data (kept exactly as published):
  • k data cover 320-2400 nm only; k = 0 elsewhere in the n range 302-2325 nm

References

Cite

CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com); See also CDGM optical 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 430 wavelengths, the same grid as the API and the library
H-LAF52 (CDGM), H-LAF52: n and k versus wavelength
λ (µm)nk
0.3021.8738770
0.3035491.8723560
0.3051061.8708630
0.306671.8693970
0.3082431.8679570
0.3098241.8665430
0.3114131.8651540
0.313011.863790
0.3146151.8624490
0.3162291.8611310
0.317851.8598350
0.3194811.8585620
0.321.8581626.771800e-06
0.3211191.857316.416725e-06
0.3227661.8560795.894175e-06
0.3244211.8548685.368945e-06
0.3260851.8536774.841022e-06
0.3277571.8525064.310391e-06
0.3294381.8513533.777039e-06
0.331.8509743.598800e-06
0.3311281.8502193.431875e-06
0.3328261.8491033.180526e-06
0.3345331.8480052.927887e-06
0.3362491.8469242.673952e-06
0.3379731.845862.418716e-06
0.3397061.8448122.162170e-06
0.341.8446372.118700e-06
0.3414481.8437811.998852e-06
0.34321.8427651.853964e-06
0.344961.8417651.708333e-06
0.3467291.840781.561955e-06
0.3485071.839811.414826e-06
0.351.839011.291300e-06
0.3502941.8388541.276542e-06
0.3520911.8379131.186481e-06
0.3538971.8369851.095957e-06
0.3557121.8360711.004969e-06
0.3575361.8351719.135148e-07
0.3593691.8342838.215914e-07
0.361.8339827.899800e-07
0.3612121.8334097.534786e-07
0.3630651.8325476.977096e-07
0.3649271.8316976.416546e-07
0.3667981.8308595.853121e-07
0.368681.8300345.286806e-07
0.371.8294634.889300e-07
0.370571.8292194.782593e-07
0.3724711.8284174.427052e-07
0.3743811.8276254.069688e-07
0.3763011.8268453.710491e-07
0.3782311.8260753.349451e-07
0.381.8253823.018500e-07
0.3801711.8253163.003143e-07
0.382121.8245672.827767e-07
0.384081.8238292.651491e-07
0.386051.82312.474311e-07
0.388031.8223822.296222e-07
0.391.821682.119000e-07
0.390021.8216732.117773e-07
0.392021.8209731.993759e-07
0.394031.8202831.869109e-07
0.3960511.8196021.743820e-07
0.3980821.818931.617889e-07
0.41.8183071.499000e-07
0.4001241.8182671.495804e-07
0.4021761.8176131.442922e-07
0.4042391.8169671.389769e-07
0.4063121.816331.336343e-07
0.4083961.8157011.282643e-07
0.410491.815081.228667e-07
0.4125951.8144671.174415e-07
0.4147111.8138621.119885e-07
0.4168381.8132641.065075e-07
0.4189761.8126741.009984e-07
0.421.8123969.835900e-08
0.4211251.8120929.700696e-08
0.4232841.8115179.441030e-08
0.4254551.810959.180032e-08
0.4276371.8103898.917696e-08
0.429831.8098358.654015e-08
0.4320351.8092898.388981e-08
0.434251.8087498.122587e-08
0.4364771.8082167.854828e-08
0.4387161.8076897.585696e-08
0.441.8073917.431300e-08
0.4409661.8071697.303748e-08
0.4432271.8066567.005072e-08
0.44551.8061486.704863e-08
0.4477851.8056476.403116e-08
0.4500821.8051526.099821e-08
0.452391.8046635.794970e-08
0.454711.8041795.488556e-08
0.4570421.8037025.180570e-08
0.4593861.803234.871005e-08
0.461.8031084.789900e-08
0.4617421.8027644.673492e-08
0.464111.8023044.515235e-08
0.466491.8018484.356166e-08
0.4688831.8013994.196282e-08
0.4712871.8009544.035578e-08
0.4737041.8005153.874050e-08
0.4761341.8000813.711693e-08
0.4785751.7996523.548504e-08
0.481.7994063.453300e-08
0.481031.7992293.419404e-08
0.4834971.798813.338203e-08
0.4859761.7983953.256587e-08
0.4884691.7979863.174551e-08
0.4909741.7975823.092095e-08
0.4934921.7971823.009216e-08
0.4960231.7967862.925912e-08
0.4985671.7963952.842181e-08
0.51.7961782.795000e-08
0.5011231.7960092.791382e-08
0.5036931.7956272.783107e-08
0.5062771.7952492.774789e-08
0.5088731.7948762.766428e-08
0.5114831.7945072.758025e-08
0.5141061.7941422.749578e-08
0.5167431.7937812.741089e-08
0.5193931.7934242.732555e-08
0.5220561.7930712.723978e-08
0.5247341.7927222.715357e-08
0.5274251.7923762.706692e-08
0.530131.7920352.697982e-08
0.5328491.7916972.689227e-08
0.5355811.7913632.680428e-08
0.5383281.7910332.671583e-08
0.5410891.7907062.662694e-08
0.5438641.7903832.653758e-08
0.5466531.7900632.644777e-08
0.5494571.7897472.635750e-08
0.551.7896862.634000e-08
0.5522751.7894342.623050e-08
0.5551071.7891252.609415e-08
0.5579541.7888192.595710e-08
0.5608151.7885162.581935e-08
0.5636911.7882162.568090e-08
0.5665821.787922.554173e-08
0.5694881.7876262.540185e-08
0.5724091.7873362.526125e-08
0.5753441.7870492.511993e-08
0.5782951.7867652.497788e-08
0.5812611.7864832.483511e-08
0.5842421.7862052.469160e-08
0.5872381.7859292.454736e-08
0.590251.7856572.440238e-08
0.5932771.7853872.425666e-08
0.5963191.785122.411018e-08
0.5993781.7848562.396296e-08
0.61.7848022.393300e-08
0.6024521.7845942.377605e-08
0.6055411.7843352.357825e-08
0.6086471.7840792.337943e-08
0.6117681.7838252.317960e-08
0.6149061.7835742.297874e-08
0.6180591.7833252.277685e-08
0.6212291.7830792.257392e-08
0.6244151.7828352.236995e-08
0.6276171.7825932.216494e-08
0.6308361.7823542.195888e-08
0.6340711.7821182.175176e-08
0.6373231.7818832.154357e-08
0.6405921.7816512.133432e-08
0.6438771.7814212.112400e-08
0.6471791.7811942.091260e-08
0.651.7810022.073200e-08
0.6504981.7809682.074788e-08
0.6538341.7807452.085423e-08
0.6571871.7805242.096113e-08
0.6605581.7803052.106858e-08
0.6639451.7800882.117658e-08
0.6673511.7798732.128514e-08
0.6707731.779662.139425e-08
0.6742131.7794492.150391e-08
0.6776711.779242.161415e-08
0.6811461.7790332.172494e-08
0.684641.7788282.183631e-08
0.6881511.7786242.194825e-08
0.691681.7784232.206076e-08
0.6952271.7782232.217384e-08
0.6987931.7780252.228751e-08
0.71.7779592.232600e-08
0.7023761.7778292.240181e-08
0.7059791.7776352.251672e-08
0.7095991.7774422.263222e-08
0.7132381.7772522.274831e-08
0.7168961.7770622.286499e-08
0.7205731.7768752.298228e-08
0.7242681.7766892.310016e-08
0.7279831.7765042.321865e-08
0.7317161.7763222.333775e-08
0.7354691.776142.345746e-08
0.7392411.7759612.357778e-08
0.7430321.7757832.369872e-08
0.7468431.7756062.382028e-08
0.7506731.7754312.394246e-08
0.7545231.7752572.406527e-08
0.7583921.7750842.418871e-08
0.7622821.7749132.431278e-08
0.7661911.7747442.443749e-08
0.770121.7745762.456284e-08
0.774071.7744092.468883e-08
0.778041.7742432.481547e-08
0.782031.7740792.494276e-08
0.7860411.7739162.507070e-08
0.7900721.7737542.519929e-08
0.7941241.7735932.532855e-08
0.7981961.7734342.545847e-08
0.81.7733642.551600e-08
0.802291.7732762.496758e-08
0.8064051.7731192.398223e-08
0.810541.7729632.299182e-08
0.8146971.7728092.199633e-08
0.8188751.7726552.099574e-08
0.8230751.7725031.999002e-08
0.8272961.7723511.897914e-08
0.8315391.7722011.796307e-08
0.8358031.7720521.694179e-08
0.840091.7719041.591528e-08
0.8443981.7717561.488350e-08
0.8487291.771611.384643e-08
0.851.7715681.354200e-08
0.8530821.7714651.359106e-08
0.8574571.7713211.366071e-08
0.8618541.7711771.373072e-08
0.8662741.7710351.380108e-08
0.8707171.7708931.387181e-08
0.8751821.7707531.394290e-08
0.8796711.7706131.401436e-08
0.8841821.7704741.408618e-08
0.8887171.7703361.415837e-08
0.8932741.7701991.423093e-08
0.8978561.7700631.430386e-08
0.91.7699991.433800e-08
0.902461.7699271.437722e-08
0.9070881.7697921.445099e-08
0.9117411.7696581.452514e-08
0.9164161.7695251.459968e-08
0.9211161.7693921.467459e-08
0.925841.769261.474989e-08
0.9305881.7691291.482558e-08
0.9353611.7689991.490165e-08
0.9401581.7688691.497812e-08
0.944981.768741.505497e-08
0.9498261.7686111.513222e-08
0.951.7686071.513500e-08
0.9546971.7684831.520978e-08
0.9595931.7683561.528772e-08
0.9645151.7682291.536607e-08
0.9694611.7681031.544482e-08
0.9744331.7679781.552397e-08
0.979431.7678531.560353e-08
0.9844531.7677281.568350e-08
0.9895021.7676041.576387e-08
0.9945771.7674811.584466e-08
0.9996781.7673581.592587e-08
11.767351.593100e-08
1.00481.7672361.600755e-08
1.009961.7671141.608966e-08
1.015141.7669921.617219e-08
1.020341.7668711.625514e-08
1.025581.766751.633851e-08
1.030841.766631.642232e-08
1.036121.766511.650655e-08
1.041441.7663911.659122e-08
1.046781.7662711.667632e-08
1.052151.7661531.676185e-08
1.057541.7660341.684783e-08
1.061.7659811.688700e-08
1.062971.7659161.693425e-08
1.068421.7657981.702113e-08
1.07391.7656811.710844e-08
1.07941.7655641.719621e-08
1.084941.7654471.728443e-08
1.09051.765331.737309e-08
1.09611.7652131.746222e-08
1.101721.7650971.755180e-08
1.107371.7649811.764184e-08
1.113051.7648651.773234e-08
1.118761.764751.782330e-08
1.124491.7646341.791474e-08
1.130261.7645191.800664e-08
1.136061.7644041.809901e-08
1.141881.7642891.819185e-08
1.147741.7641741.828518e-08
1.153621.764061.837898e-08
1.159541.7639451.847326e-08
1.165491.7638311.856802e-08
1.171471.7637161.866328e-08
1.177471.7636021.875902e-08
1.183511.7634871.885525e-08
1.189581.7633731.895197e-08
1.195681.7632591.904919e-08
1.21.7631781.911800e-08
1.201811.7631451.924821e-08
1.207981.763031.969060e-08
1.214171.7629162.013526e-08
1.22041.7628022.058219e-08
1.226661.7626872.103142e-08
1.232951.7625732.148295e-08
1.239271.7624582.193680e-08
1.245631.7623442.239298e-08
1.252021.7622292.285149e-08
1.258441.7621142.331236e-08
1.264891.7619992.377559e-08
1.271381.7618842.424119e-08
1.27791.7617692.470919e-08
1.284451.7616542.517958e-08
1.291041.7615382.565238e-08
1.297661.7614232.612762e-08
1.304321.7613072.660528e-08
1.311011.7611912.708540e-08
1.317731.7610742.756798e-08
1.324491.7609582.805304e-08
1.331281.7608412.854058e-08
1.338111.7607242.903062e-08
1.344971.7606062.952318e-08
1.351871.7604893.001826e-08
1.35881.7603713.051588e-08
1.365771.7602523.101605e-08
1.372771.7601343.151879e-08
1.379811.7600143.202411e-08
1.386891.7598953.253202e-08
1.3941.7597753.304253e-08
1.41.7596743.347300e-08
1.401151.7596553.350054e-08
1.408341.7595353.367235e-08
1.415561.7594143.384504e-08
1.422821.7592923.401862e-08
1.430121.759173.419309e-08
1.437451.7590483.436846e-08
1.444821.7589253.454472e-08
1.452231.7588023.472189e-08
1.459681.7586783.489997e-08
1.467171.7585543.507896e-08
1.474691.7584293.525887e-08
1.482251.7583033.543970e-08
1.489861.7581773.562146e-08
1.49751.7580513.580415e-08
1.505181.7579233.598777e-08
1.51291.7577953.617234e-08
1.520651.7576673.635786e-08
1.528451.7575383.654432e-08
1.536291.7574083.673175e-08
1.544171.7572783.692013e-08
1.552091.7571473.710948e-08
1.560051.7570153.729980e-08
1.568051.7568823.749110e-08
1.576091.7567493.768338e-08
1.584181.7566153.787665e-08
1.59231.756483.807090e-08
1.61.7563523.825500e-08
1.600471.7563453.850157e-08
1.608671.7562084.283971e-08
1.616921.7560714.720010e-08
1.625221.7559335.158285e-08
1.633551.7557945.598808e-08
1.641931.7556546.041591e-08
1.650351.7555136.486644e-08
1.658811.7553726.933979e-08
1.667321.7552297.383609e-08
1.675871.7550867.835544e-08
1.684471.7549418.289798e-08
1.693111.7547968.746381e-08
1.701791.754659.205305e-08
1.710521.7545029.666583e-08
1.719291.7543541.013023e-07
1.728111.7542041.059625e-07
1.736971.7540541.106466e-07
1.745881.7539021.153547e-07
1.754831.7537491.200870e-07
1.763831.7535951.248436e-07
1.772881.753441.296245e-07
1.781971.7532841.344300e-07
1.791111.7531271.392601e-07
1.81.7529731.439600e-07
1.800291.7529681.444597e-07
1.809531.7528081.601929e-07
1.818811.7526471.760068e-07
1.828131.7524851.919018e-07
1.837511.7523212.078783e-07
1.846931.7521562.239368e-07
1.856411.751992.400776e-07
1.865931.7518222.563012e-07
1.87551.7516532.726080e-07
1.885111.7514822.889984e-07
1.894781.7513113.054729e-07
1.90451.7511373.220318e-07
1.914271.7509633.386757e-07
1.924081.7507863.554050e-07
1.933951.7506083.722200e-07
1.943871.7504293.891213e-07
1.953841.7502484.061092e-07
1.963861.7500664.231843e-07
1.973931.7498824.403470e-07
1.984051.7496964.575976e-07
1.994231.7495084.749368e-07
21.7494024.847700e-07
2.004461.7493195.043834e-07
2.014741.7491285.496216e-07
2.025071.7489365.950918e-07
2.035461.7487426.407952e-07
2.045891.7485456.867330e-07
2.056391.7483487.329063e-07
2.066931.7481487.793165e-07
2.077531.7479468.259647e-07
2.088191.7477428.728521e-07
2.09891.7475379.199800e-07
2.109661.7473299.673496e-07
2.120481.747121.014962e-06
2.131361.7469091.062819e-06
2.142291.7466951.110921e-06
2.153271.7464791.159270e-06
2.164321.7462621.207867e-06
2.175421.7460421.256713e-06
2.186571.745821.305809e-06
2.197791.7455951.355157e-06
2.21.7455511.364900e-06
2.209061.7453691.577660e-06
2.220391.745141.843783e-06
2.231771.7449092.111270e-06
2.243221.7446762.380129e-06
2.254721.744442.650367e-06
2.266291.7442022.921991e-06
2.277911.7439613.195008e-06
2.289591.7437183.469426e-06
2.301331.7434723.745250e-06
2.313141.7432244.022489e-06
2.3251.7429734.301150e-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
—