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Optical constants of BAK1
S-BAL11 (OHARA)

Wavelength: µm
 (0.32 – 2.4)  
 

Other optical constants

n   k   logX   logY   eV

Dispersion formula [ i ]

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

Comments

Recommended

Data

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

Additional information

n_is_absolute: false
λ_is_vacuum: false
temperature: 25.0 °C
coefficients_of_thermal_dispersion: 3.44e-06 1.26e-08 -4.45e-11 5.04e-07 6.25e-10 0.192
n_d: 1.572501
V_d: 57.742980
glass_code: 573578
glass_status: standard
density: 3.02 g/cm3
coefficient_of_thermal_expansion_1: 6.6e-06 K-1
coefficient_of_thermal_expansion_2: 8e-06 K-1
ΔP_gF: -0.0024
climatic_resistance: 2.0
acid_resistance: 2.0
phosphate_resistance: 1.0

References

1) OHARA optical glass datasheets 2015-12-01
2) OHARA Zemax catalog 2015-12-01

More info - wiki

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