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## Optical constants of OHARA - TIM (Titanate, medium-index)

S-TIM39

Wavelength:
µm

(0.36 – 2.4)

### Complex refractive index (*n+ik)*

n
k
LogX
LogY
eV

### Derived optical constants

### Dispersion formula

$$n^2-1=\frac{1.47008105λ^2}{λ^2-0.0102900432}+\frac{0.224752746λ^2}{λ^2-0.0541276904}+\frac{2.44968592λ^2}{λ^2-237.43494}$$### Conditions & Spec sheet

n_absolute: false wavelength_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: -2.24e-06 1.21e-08 -4.81e-11 6.82e-07 7.42e-10 0.299 nd: 1.666800 Vd: 33.054985 glass_code: 667330 density: 2.92 g/cm^{3}thermal_expansion: - temperature_range: -30 70 °C coefficient: 8.7e-06 K^{-1}- temperature_range: 20 300 °C coefficient: 1.04e-05 K^{-1}dPgF: 0.0077 climatic_resistance: 1.0 acid_resistance: 1.0 phosphate_resistance: 1.0

### Comments

Recommended - Lightweight

### References

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

See also OHARA glass data sheets