We are pleased to introduce S-LAL7Q as an optical glass which has improved on chemical durability desired in the region of LAL. S-LAL7Q has the same Refractive Indices and Abbe Number as S-LAL7. In addition, the processability of lens polishing of S-LAL7Q is better than S-LAL7.
1. Improved chemical durability compared to S-LAL7.
2. Acid resistance is improved to Class 4 from Class 5.
3. Water resistance is improved to Class 2 from Class 3.
4. Lower density compared to S-LAL7. Density 3.24 from 3.73.