Optical components consisting of aromatic polyesters molded in the form of an optical lens

US4225698A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Harald Medem · Krefeld, DE
• Dieter Freitag · Krefeld, DE
• Hans Hespe · Leverkusen, DE
• Carl Heynemann · Taufkirchen, DE

Key dates

• Filing date: Jan 19, 1979
• Grant date: Sep 30, 1980
• Expiry date: Jan 19, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G63/193
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Thermoplastic aromatic polyesters comprising cocondensed bisphenol residues generally have a refractive index n.sub.d of from 1.60 to 1.66, an Abbe coefficient v.sub.d of from 27 to 21 and a color triplet of about 5.1, 0.1, O and are excellent starting materials for the production of optical components, particularly high quality lenses for still and cine cameras.