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Optical constants of OHARA - BAL (Barium, low-index)
BAL11

Wavelength: µm
 (0.360 – 0.9)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.433807-0.009321052λ^{2}+0.01397331λ^{-2}+0.0001804732λ^{-4}+7.763637\text{×}10^{-06}λ^{-6}-1.184873\text{×}10^{-07}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 3.5762e-06 0.0 0.0 0.0 0.0 0.0
nd: 1.572501
Vd: 57.760854
glass_code: 573578
glass_status: preferred
density: 3.09 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 7.2e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 8.6e-06 K-1
dPgF: -0.0018

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

BAK1 optical glass

BAK1 is a very popular optical glass. Most glass makers produce this or very similar glass.

BAK1 or similar glasses produced by different makers

Maker Glass
Schott N-BAK1
Hikari E-BAK1
Ohara S-BAL11
CDGM H-BAK8

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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Glass

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