Table 2.

Change in refractive index, −Δn × 10⁴, for fused silica for the temperature interval from +18 to −160 °C

λ, nm	667.8	587.6	501.6	471.3
Present study	12.1	12.2	12.7	12.8
Austin and Pierce		11.8
Rinne	10	11	12	14