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

S-TIM2

Wavelength:
µm

(0.36 – 2.4)

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

n
k
LogX
LogY
eV

### Derived optical constants

### Dispersion formula

$$n^2-1=\frac{1.42193846λ^2}{λ^2-0.0107291511}+\frac{0.133827968λ^2}{λ^2-0.0572587546}+\frac{1.45060574λ^2}{λ^2-145.381805}$$### Conditions & Spec sheet

n_absolute: false wavelength_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 1.62e-07 1.19e-08 -3.5e-11 6.49e-07 8.6e-10 0.291 nd: 1.620041 Vd: 36.263378 glass_code: 620363 density: 2.69 g/cm^{3}thermal_expansion: - temperature_range: -30 70 °C coefficient: 8.1e-06 K^{-1}- temperature_range: 20 300 °C coefficient: 9.5e-06 K^{-1}dPgF: 0.0051 climatic_resistance: 2.0 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