FTM16 (OHARA)

Glasses, oxides and dielectrics supplier-datasheet Supplier: OHARA

1 dataset, together covering 0.334–2.325 µm. Default: FTM16.

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Datasets

FTM

FTM16 n 0.334–2.325 µm default

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# FTM16 (OHARA): FTM16
ohara_ftm16 = ls.fetch_refractiveindex("specs", "OHARA-optical", "FTM16", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ohara_ftm16.range_nm)  # (334, 2325) nm
eps = ohara_ftm16.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_53e468cc256c/lightsmith"
ohara_ftm16 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(ohara_ftm16.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (ohara-ftm16/ohara).

# ... load ohara_ftm16 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=ohara_ftm16)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=400, stop_nm=1000, 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.

About FTM16 (OHARA)

Ohara Group is an international group of companies with headquarters in Japan and subsidiaries in Japan (Ohara, Inc.), United States (Ohara Corporation), and Germany (Ohara, GmbH). Ohara is known for its specialization in high-quality optical glass, ceramics, and other advanced materials. With a history spanning over a century, Ohara has been at the forefront of optical innovations, producing a wide range of specialized glass types including low-dispersion and high-refractive-index materials. These are used in various demanding applications like telescopes, microscopes, and high-performance camera lenses. The company's commitment to research and development has led to groundbreaking products such as low thermal expansion glass-ceramics and other specialty materials used in semiconductor manufacturing and space telescopes. With stringent quality control procedures, Ohara ensures that its optical glass meets the highest standards of clarity, consistency, and performance. Their materials are widely regarded for their exceptional quality and are often used in scientific research, aerospace, and other fields where precision and reliability are paramount. Ohara's reputation for technical excellence and innovation makes it a key player in the global optics and materials science industries, providing cutting-edge solutions for a range of complex applications.

Other names: FTM16

API: /v1/materials/mat_509d1e6d29ae · slug ohara-ftm16