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New Glass Types


S-FPL55 is an optical glass featuring very low dispersion, simlar to S-FPL53, with the advantage of improved polishing characteristics. This new glass type has better abrasion values. We are pleased to introduce S-FPL55 as an excellent choice for effective chromatic aberration correction in an optical system.

Eco Optical Glass
Refractive Index nd 1.43875
Abbe Number νd 94.66
-30~70°C 136
+100~300°C 166
Transformation Point Tg(°C) 435
Yield Point At(°C) 460
Coloring λ80 335
λ5 290
Chemical ResistanceRW(P) 2
RA(P) 3
W(S) 2
SR 52.1
PR 4.1
Specific Gravity 3.59
Knoop Hardness Hk 340[3]
Abrasion Aa 387
Detail Catalog DATA PDF
Available shapes

•cut blanks
•polished preform

Please consult us about available size and tolerance.

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