Optical constants

Refractive index of Soda lime glass

Rubin 1985: Far-infared; n,k 5–300 µm

Data: tabulated nk
Range: 5–300 µm
Points: 54
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 1.96666
Extinction coefficient k: 0.46984

Permittivity ε₁: 3.647
Permittivity ε₂: 1.84803

Absorption coefficient α: 1525.63 cm⁻¹
Penetration depth δ = λ/(2πk): 13109.3 nm

Abbe number V_d: —
Chromatic dispersion dn/dλ: 0.0018 µm⁻¹

Group index n_g: 1.897
Group velocity dispersion: — fs²/mm

Dispersion parameter D: — ps/(nm·km)
Photon energy: 0.0320373 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

# Soda lime glass: Rubin 1985: Far-infared; n,k 5–300 µm
soda_lime = ls.fetch_refractiveindex("glass", "soda-lime", "Rubin-IR", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(soda_lime.range_nm)  # (5000, 300000) nm
eps = soda_lime.eps([38700])  # 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_062c0e6f262b/lightsmith"
soda_lime = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(soda_lime.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (soda-lime/rubin-1985-ir).

# ... load soda_lime as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=soda_lime)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=5000, stop_nm=300000, 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.

Comments and conditions

Soda lime silica window glass in the far-infrared. Opticsl constants are same for clear, colored (bronze, grey, green) and low-iron glass.

References

M. Rubin. Optical properties of soda lime silica glasses. Sol. Energy Mater. 12, 275-288 (1985)

doi:10.1016/0165-1633(85)90052-8 Optical properties of soda lime silica glasses, Solar Energy Materials (1985)

Cite

M. Rubin. Optical properties of soda lime silica glasses. Solar Energy Materials, 12, 275-288 (1985), doi:10.1016/0165-1633(85)90052-8; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

54 rows as published

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

Soda lime glass, Rubin 1985: Far-infared; n,k 5–300 µm: n and k versus wavelength
λ (µm)	n	k
5.0	1.397	0.003
6.0	1.323	0.005
7.0	1.152	0.008
8.0	0.939	0.028
8.2	0.822	0.061
8.4	0.624	0.216
8.5	0.613	0.354
8.7	0.684	0.543
9.0	0.736	0.759
9.2	0.812	0.938
9.4	0.971	1.123
9.5	1.085	1.187
9.6	1.209	1.232
9.8	1.479	1.24
10.0	1.707	1.123
10.5	1.956	0.809
11.0	1.994	0.485
11.5	1.864	0.286
12.0	1.733	0.222
12.5	1.612	0.244
13.0	1.606	0.306
13.5	1.615	0.304
14.0	1.615	0.28
14.5	1.558	0.269
15.0	1.554	0.299
15.5	1.546	0.288
16.0	1.511	0.278
16.5	1.468	0.288
17.0	1.433	0.309
17.5	1.401	0.322
18.0	1.328	0.329
18.5	1.216	0.382
19.0	1.108	0.521
19.5	1.069	0.76
20.0	1.177	0.966
21.0	1.519	1.223
22.0	1.931	1.216
23.0	2.196	0.988
24.0	2.263	0.746
25.0	2.223	0.582
27.0	2.139	0.462
30.0	2.035	0.381
35.0	1.96	0.421
40.0	1.969	0.487
45.0	2.033	0.538
50.0	2.099	0.545
60.0	2.199	0.536
70.0	2.274	0.515
80.0	2.333	0.493
90.0	2.384	0.47
100.0	2.426	0.445
150.0	2.547	0.326
200.0	2.592	0.242
300.0	2.608	0.152

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: —

Soda lime glass: all datasets

About Soda lime glass

Soda-lime glass is one of the most common types of glass and serves as a workhorse material in a wide range of applications. Composed primarily of silica, soda, and lime, this type of glass is known for its relatively low cost, ease of production, and versatility. Soda-lime glass is often used in containers, windows, and a myriad of everyday products. While it is not as resistant to high temperatures or corrosive materials as some specialized glasses like borosilicate, it offers good optical clarity and can be easily molded, blown, or drawn into various shapes. Soda-lime glass is also amenable to treatments like tempering or laminating to enhance its mechanical strength or safety features. Its physical and chemical properties make it well-suited for applications where extreme conditions are not a factor, but affordability and versatility are valued.

Soda-lime glass - Wikipedia

More about Soda lime glass →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/glass/misc/soda-lime/nk/Rubin-IR.yml
ID: ds_062c0e6f262b
API: /v1/datasets/ds_062c0e6f262b

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