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Optical constants of OHARA - BAL (Barium, low-index)
S-BAL50

Wavelength: µm
 (0.3 – 2.4)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.3982661-0.010222781λ^{2}+0.012110445λ^{-2}+0.00037767581λ^{-4}-2.7339021\text{×}10^{-05}λ^{-6}+1.5701891\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
λ_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 1.64e-06 1.93e-08 4.39e-12 5.12e-07 8.07e-10 0.162
n_d: 1.559625
V_d: 61.172671
glass_code: 560612
glass_status: special
density: 2.74 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 7.5e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 9e-06 K-1
ΔP_gF: -0.0033
climatic_resistance: 2.0
acid_resistance: 4.2
phosphate_resistance: 2.2

References

OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets

Data

[Expressions for n]   [CSV - comma separated]   [TXT - tab separated]   [Full database record]

INFO

Ohara Group

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 manufactures optical and electronic products and also offers measurement services, in particular measurement of refractive indices of solids and liquids.

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