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Optical constants of OHARA - i-Line glasses
BAL15Y

Wavelength: µm
 (0.3 – 2.4)  
 

Other optical constants

n   k   logX   logY   eV

Dispersion formula [ i ]

$$n^2-1=\frac{1.28348331λ^2}{λ^2-0.00790900515}+\frac{0.102800765λ^2}{λ^2-0.0305971274}+\frac{0.404609885λ^2}{λ^2-46.5268356}$$

Comments

Improved XMT at 365

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: 1.61e-06 1.32e-08 -4.12e-11 4.65e-07 5.14e-10 0.201
n_d: 1.556711
V_d: 58.679177
glass_code: 557587
density: 2.9 g/cm3
coefficient_of_thermal_expansion_1: 7.6e-06 K-1
coefficient_of_thermal_expansion_2: 9e-06 K-1
ΔP_gF: -0.0021
climatic_resistance: 1.0
acid_resistance: 1.2
phosphate_resistance: 1.0

References

1) OHARA i-line glass data
2) OHARA Zemax catalog 2015-12-01

More info - wiki

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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