Back to results
US 6,333,821 B1Granted
Optical elements
AssigneeAlcatel
InventorsHartmut Krüger, Waltraud Neumann, Andreas Bräuer, Peter Dannberg
Life of this patent
Estimating the term…
Abstract
The invention relates to optical elements comprised of an optical isotropic completely aromatic polyester with a glass transition temperature Tg≧180° C.
Claims15
Optical elements made of an optically isotropic plastic, characterized in that the plastic is a fully aromatic polyester without ether function and with a glass transition temperature Tg≧180° C. and the optical elements have a refraction index of 1.4 to 1.57 at 630 nm.
Optical elements in accordance with any of the preceding claims, characterized in that the refraction index is from 1.45 to 1.57 at 630 nm.
Dependencies are inferred from the claim text.