Optical constants

Refractive index of C₃H₆O (Acetone)

Rheims et al. 1997: n 0.477–0.83 µm

Data: formula 5
Range: 0.4765–0.83 µm
Temperature: 293 K
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 1.35916
Extinction coefficient k: 0

Permittivity ε₁: 1.8473
Permittivity ε₂: 0

Absorption coefficient α: 0 cm⁻¹
Penetration depth δ = λ/(2πk): — nm

Abbe number V_d: 54.465
Chromatic dispersion dn/dλ: -0.0335913 µm⁻¹

Group index n_g: 1.37889
Group velocity dispersion: 65.8052 fs²/mm

Dispersion parameter D: -359.002 ps/(nm·km)
Photon energy: 2.11001 eV

ε = (n + ik)², α = 4πk/λ, n_g = 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

# C3H6O (Acetone): Rheims et al. 1997: n 0.477–0.83 µm
c3h6o = ls.fetch_refractiveindex("organic", "acetone", "Rheims", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(c3h6o.range_nm)  # (476.5, 830) nm
eps = c3h6o.eps([633])  # complex permittivity

Downloads the original record once (pinned to the imported snapshot) and caches it.

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_bb505497ce6e/lightsmith"
c3h6o = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(c3h6o.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (acetone/rheims-1997).

# ... load c3h6o as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=c3h6o)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=477, stop_nm=830, num=81),
)
res = ls.solve(sim)  # exact Mie for a sphere
print(res.q_ext)     # extinction efficiency at each wavelength

Same spec runs with DDA, FDTD, BEM or T-matrix: ls.compare(sim, ["mie", "dda"]).

Materials guide Open a sphere of it in Studio Quick start Ask the community

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

Cauchy (formula 5), λ in µm

n = 1.34979 + 0.00306 λ^{- 2.0} + 6 \times 10^{-5} λ^{- 4.0}

Valid from 0.4765 to 0.83 µm.

Coefficients as stored

C_i	Value
C1	1.34979
C2	0.00306
C3	-2.0
C4	6e-05
C5	-4.0

Comments and conditions

20 °C

Conditions

temperature: 293 K

References

J. Rheims, J Köser, T Wriedt. Refractive-index measurements in the near-IR using an Abbe refractometer. Meas. Sci. Technol. 8, 601-605 (1997)

doi:10.1088/0957-0233/8/6/003 Refractive-index measurements in the near-IR using an Abbe refractometer, Measurement Science and Technology (1997)

Cite

J Rheims, J Köser and T Wriedt. Refractive-index measurements in the near-IR using an Abbe refractometer. Measurement Science and Technology, 8, 601-605 (1997), doi:10.1088/0957-0233/8/6/003; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

Computed on 400 wavelengths, the same grid as the API and the library

CSV comma separated TXT tab separated YAML n, k Full database record original YAML All quantities CSV JSON metadata

C3H6O (Acetone), Rheims et al. 1997: n 0.477–0.83 µm: n and k versus wavelength
λ (µm)	n
0.4765	1.364431
0.477163	1.364387
0.477827	1.364343
0.478492	1.3643
0.479158	1.364256
0.479825	1.364213
0.480493	1.36417
0.481162	1.364127
0.481832	1.364084
0.482502	1.364041
0.483174	1.363998
0.483846	1.363956
0.48452	1.363913
0.485194	1.363871
0.485869	1.363829
0.486546	1.363787
0.487223	1.363745
0.487901	1.363703
0.48858	1.363662
0.48926	1.36362
0.489941	1.363579
0.490623	1.363538
0.491306	1.363497
0.49199	1.363456
0.492674	1.363415
0.49336	1.363374
0.494047	1.363334
0.494735	1.363293
0.495423	1.363253
0.496113	1.363213
0.496803	1.363173
0.497495	1.363133
0.498187	1.363093
0.49888	1.363054
0.499575	1.363014
0.50027	1.362975
0.500966	1.362935
0.501664	1.362896
0.502362	1.362857
0.503061	1.362818
0.503761	1.36278
0.504462	1.362741
0.505165	1.362702
0.505868	1.362664
0.506572	1.362626
0.507277	1.362587
0.507983	1.362549
0.50869	1.362511
0.509398	1.362474
0.510107	1.362436
0.510817	1.362398
0.511528	1.362361
0.51224	1.362324
0.512953	1.362286
0.513667	1.362249
0.514382	1.362212
0.515098	1.362175
0.515815	1.362139
0.516533	1.362102
0.517251	1.362065
0.517971	1.362029
0.518692	1.361993
0.519414	1.361956
0.520137	1.36192
0.520861	1.361884
0.521586	1.361849
0.522312	1.361813
0.523039	1.361777
0.523767	1.361742
0.524496	1.361706
0.525226	1.361671
0.525957	1.361636
0.526689	1.361601
0.527422	1.361566
0.528156	1.361531
0.528891	1.361496
0.529628	1.361461
0.530365	1.361427
0.531103	1.361392
0.531842	1.361358
0.532582	1.361324
0.533324	1.36129
0.534066	1.361256
0.534809	1.361222
0.535554	1.361188
0.536299	1.361154
0.537045	1.361121
0.537793	1.361087
0.538541	1.361054
0.539291	1.361021
0.540042	1.360988
0.540793	1.360955
0.541546	1.360922
0.5423	1.360889
0.543055	1.360856
0.54381	1.360823
0.544567	1.360791
0.545325	1.360758
0.546084	1.360726
0.546844	1.360694
0.547605	1.360662
0.548368	1.36063
0.549131	1.360598
0.549895	1.360566
0.55066	1.360534
0.551427	1.360502
0.552194	1.360471
0.552963	1.360439
0.553733	1.360408
0.554503	1.360377
0.555275	1.360346
0.556048	1.360314
0.556822	1.360284
0.557597	1.360253
0.558373	1.360222
0.55915	1.360191
0.559928	1.360161
0.560708	1.36013
0.561488	1.3601
0.56227	1.360069
0.563052	1.360039
0.563836	1.360009
0.564621	1.359979
0.565407	1.359949
0.566193	1.359919
0.566982	1.359889
0.567771	1.35986
0.568561	1.35983
0.569352	1.359801
0.570145	1.359771
0.570938	1.359742
0.571733	1.359713
0.572529	1.359684
0.573326	1.359655
0.574124	1.359626
0.574923	1.359597
0.575723	1.359568
0.576524	1.359539
0.577327	1.359511
0.57813	1.359482
0.578935	1.359454
0.579741	1.359426
0.580547	1.359397
0.581355	1.359369
0.582165	1.359341
0.582975	1.359313
0.583786	1.359285
0.584599	1.359257
0.585413	1.35923
0.586227	1.359202
0.587043	1.359175
0.58786	1.359147
0.588679	1.35912
0.589498	1.359092
0.590318	1.359065
0.59114	1.359038
0.591963	1.359011
0.592787	1.358984
0.593612	1.358957
0.594438	1.35893
0.595265	1.358904
0.596094	1.358877
0.596924	1.35885
0.597754	1.358824
0.598586	1.358798
0.599419	1.358771
0.600254	1.358745
0.601089	1.358719
0.601926	1.358693
0.602764	1.358667
0.603603	1.358641
0.604443	1.358615
0.605284	1.358589
0.606126	1.358564
0.60697	1.358538
0.607815	1.358512
0.608661	1.358487
0.609508	1.358462
0.610356	1.358436
0.611206	1.358411
0.612057	1.358386
0.612908	1.358361
0.613762	1.358336
0.614616	1.358311
0.615471	1.358286
0.616328	1.358261
0.617186	1.358237
0.618045	1.358212
0.618905	1.358188
0.619766	1.358163
0.620629	1.358139
0.621493	1.358114
0.622358	1.35809
0.623224	1.358066
0.624091	1.358042
0.62496	1.358018
0.62583	1.357994
0.626701	1.35797
0.627573	1.357946
0.628447	1.357923
0.629321	1.357899
0.630197	1.357875
0.631074	1.357852
0.631953	1.357828
0.632832	1.357805
0.633713	1.357782
0.634595	1.357758
0.635478	1.357735
0.636363	1.357712
0.637249	1.357689
0.638136	1.357666
0.639024	1.357643
0.639913	1.357621
0.640804	1.357598
0.641696	1.357575
0.642589	1.357553
0.643483	1.35753
0.644379	1.357508
0.645276	1.357485
0.646174	1.357463
0.647073	1.357441
0.647974	1.357418
0.648876	1.357396
0.649779	1.357374
0.650683	1.357352
0.651589	1.35733
0.652496	1.357308
0.653404	1.357287
0.654313	1.357265
0.655224	1.357243
0.656136	1.357221
0.657049	1.3572
0.657964	1.357178
0.65888	1.357157
0.659797	1.357136
0.660715	1.357114
0.661635	1.357093
0.662556	1.357072
0.663478	1.357051
0.664401	1.35703
0.665326	1.357009
0.666252	1.356988
0.667179	1.356967
0.668108	1.356946
0.669038	1.356926
0.669969	1.356905
0.670901	1.356885
0.671835	1.356864
0.67277	1.356844
0.673707	1.356823
0.674644	1.356803
0.675583	1.356782
0.676524	1.356762
0.677465	1.356742
0.678408	1.356722
0.679352	1.356702
0.680298	1.356682
0.681245	1.356662
0.682193	1.356642
0.683143	1.356622
0.684093	1.356603
0.685046	1.356583
0.685999	1.356563
0.686954	1.356544
0.68791	1.356524
0.688867	1.356505
0.689826	1.356485
0.690786	1.356466
0.691748	1.356447
0.692711	1.356428
0.693675	1.356408
0.69464	1.356389
0.695607	1.35637
0.696575	1.356351
0.697545	1.356332
0.698516	1.356313
0.699488	1.356295
0.700461	1.356276
0.701436	1.356257
0.702413	1.356239
0.70339	1.35622
0.704369	1.356201
0.70535	1.356183
0.706331	1.356164
0.707315	1.356146
0.708299	1.356128
0.709285	1.35611
0.710272	1.356091
0.711261	1.356073
0.712251	1.356055
0.713242	1.356037
0.714235	1.356019
0.715229	1.356001
0.716224	1.355983
0.717221	1.355965
0.718219	1.355948
0.719219	1.35593
0.72022	1.355912
0.721222	1.355895
0.722226	1.355877
0.723231	1.355859
0.724238	1.355842
0.725246	1.355825
0.726256	1.355807
0.727266	1.35579
0.728279	1.355773
0.729292	1.355755
0.730307	1.355738
0.731324	1.355721
0.732342	1.355704
0.733361	1.355687
0.734382	1.35567
0.735404	1.355653
0.736427	1.355636
0.737452	1.35562
0.738479	1.355603
0.739507	1.355586
0.740536	1.355569
0.741567	1.355553
0.742599	1.355536
0.743632	1.35552
0.744667	1.355503
0.745704	1.355487
0.746742	1.355471
0.747781	1.355454
0.748822	1.355438
0.749864	1.355422
0.750908	1.355406
0.751953	1.355389
0.753	1.355373
0.754048	1.355357
0.755097	1.355341
0.756148	1.355325
0.757201	1.35531
0.758254	1.355294
0.75931	1.355278
0.760367	1.355262
0.761425	1.355246
0.762485	1.355231
0.763546	1.355215
0.764609	1.3552
0.765673	1.355184
0.766739	1.355169
0.767806	1.355153
0.768874	1.355138
0.769945	1.355123
0.771016	1.355107
0.772089	1.355092
0.773164	1.355077
0.77424	1.355062
0.775318	1.355047
0.776397	1.355032
0.777478	1.355016
0.77856	1.355002
0.779643	1.354987
0.780728	1.354972
0.781815	1.354957
0.782903	1.354942
0.783993	1.354927
0.785084	1.354913
0.786177	1.354898
0.787271	1.354883
0.788367	1.354869
0.789464	1.354854
0.790563	1.35484
0.791663	1.354825
0.792765	1.354811
0.793868	1.354796
0.794973	1.354782
0.79608	1.354768
0.797188	1.354754
0.798297	1.354739
0.799409	1.354725
0.800521	1.354711
0.801635	1.354697
0.802751	1.354683
0.803868	1.354669
0.804987	1.354655
0.806108	1.354641
0.80723	1.354627
0.808353	1.354613
0.809478	1.3546
0.810605	1.354586
0.811733	1.354572
0.812863	1.354559
0.813994	1.354545
0.815127	1.354531
0.816262	1.354518
0.817398	1.354504
0.818536	1.354491
0.819675	1.354477
0.820816	1.354464
0.821958	1.354451
0.823102	1.354437
0.824248	1.354424
0.825395	1.354411
0.826544	1.354398
0.827694	1.354384
0.828846	1.354371
0.83	1.354358

Optical transmission calculator

Free-standing sample in vacuum, normal incidence

Transmittance T: —
Reflectance R: —

Fresnel reflection calculator

R_p: —
R_s: —
R = (R_p+R_s)/2: —
Phase φ_p: —
Phase φ_s: —
Brewster angle θ_B: —
Critical angle θ_C: —

C₃H₆O (Acetone): all datasets

About C3H6O (Acetone)

Acetone (C₃H₆O): A clear, colorless liquid, acetone is a fast-evaporating solvent known for its distinct sweet smell. Commonly used as a nail polish remover and paint thinner, it is also an essential industrial solvent, playing a role in the production of pharmaceuticals, plastics, and other chemicals. Acetone is miscible with water and serves as an important solvent in the laboratory setting for cleaning and in organic synthesis. It has low absorption in the UV and visible spectral regions, making it useful for certain optical applications, especially as a solvent in liquid-based systems. Chemical formula: CH₃COCH₃

More about C3H6O (Acetone) →

Listed in

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/organic/C3H6O - acetone/nk/Rheims.yml
ID: ds_bb505497ce6e
API: /v1/datasets/ds_bb505497ce6e

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