Optical glass type S-FPM4: high partial dispersion ratios.

Type Code nc nd nF ng vd s.g. Coloring
S-FPM4 528765 1.52630 1.52841 1.53321 1.53694 76.46 3.76 340/-

High Partial Dispersion Ratios θg

S-FPM4 is an optical glass with high partial dispersion ratios θg, F in the FPM region. The material is very useful for polished lenses that are effective for secondary chromatic aberration correction and these characteristics make it ideal for use in a wide range of applications, such as interchangeable photographic and broadcast lenses as well as automotive lenses. (maximum THK is 35mm)

Advantages of S-FPM4

  • High partial dispersion ratios θg, F
S-FPM4 Glass Characteristics
S-FPM4 Glass Map location Comparison