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Optical constants of BAK1
S-BAL11 (OHARA)

Wavelength: µm
 (0.32 – 2.4)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula [ i ]

$$n^2-1=\frac{0.821314256λ^2}{λ^2-0.00351436131}+\frac{0.612586478λ^2}{λ^2-0.0179762375}+\frac{1.24859637λ^2}{λ^2-133.45667}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 3.44e-06 1.26e-08 -4.45e-11 5.04e-07 6.25e-10 0.192
nd: 1.572501
Vd: 57.742980
glass_code: 573578
glass_status: special
density: 3.02 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 6.6e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 8e-06 K-1
dPgF: -0.0024
climatic_resistance: 2.0
acid_resistance: 2.0
phosphate_resistance: 1.0

Comments

Recommended

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.

External links


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

Glass

External links