S-FPM5 is an optical glass for polished lenses with a Δn/ΔT that is close to zero.
S-FPM5 is a glass material with a Δn / ΔT closer to zero than conventional FP-based glass materials and is expected to effectively correct refractive index fluctuations (temperature drift) due to temperature changes. In addition, it has a high partial dispersion ratio θg, F, which is a characteristic of FP-based glass materials and is effective for correcting secondary chromatic aberration. This glass material can be used, not only for in-vehicle camera lenses, but also for other applications such as projector and interchangeable lenses.
|Classification of environmental measures||Environmentally safe|
|Refractive Index nd||1.55200|
|Abbe Number νd||70.70|
D line 40～60℃
|Partial dispersion ratio θg,F||0.5421|
|Abnormal dispersibility ⊿θg,F||0.015|
|Transformation Point Tg(℃)||474|
|Yield Point At(℃)||503|
|Knoop Hardness Hk||410〔4〕|
|Detail Catalog DATA|
・Aspherical Glass Mold Lenses
(Please consult us about product form of supply, available shapes, sizes and tolerances.)