Patent ID: 6553789
Filing Date: 2003-04-29
Classification: C03B

Abstract:
A method for producing quartz glass plates of high refractive index homogeneities from a cylindrical quartz glass body having a high refractive index homogeneity along its geometrical axis and in circumferential direction, and a variable refractive index curve at least approximately in rotational symmetry to a cylinder axis Xâ€”X, comprising:cutting out an interior portion of said cylindrical quartz glass body to form a ring shaped body; separating the ring shaped body into at least two concave parts along separation cuts substantially parallel to the axis Xâ€”X; separately inserting said at least two concave parts into corresponding moulds; and heating said at least two concave parts in said moulds such that said at least two concave parts are respectively transformed into quartz glass plates of a desired thickness.