S-TIH53WN, S-LAH66N, and S-LAL18N have been modified in dispersion properties compared to conventional glass to meet the demands for high-precision lenses.
Adjustments have been made to the refractive index (excluding d-line), partial dispersion, partial dispersion ratio, abnormal dispersion, and the constants in the dispersion formula to reflect the changes in dispersion characteristics. Other properties remain unchanged.