Patent ID: 9738556
Date: 2017-08-22
CPC Classifications: C03B

Claim:
1. A method for producing rod lenses with an enveloping diameter of a rod lens face of up to 200 mm and an edge length of at least 800 mm, comprising directly fabricating the rod lenses from a cylindrical fused silica ingot element prepared by generating synthetic quartz glass material SiO x particles in a flame hydrolysis nozzle and depositing the particles onto a rotating die in a direct, one-stage deposition process, and moving the rotating die away from the flame hydrolysis nozzle in a linear fashion with respect to a flame stream from the nozzle such that the distance from the flame of the flame stream and a surface of a forming silica glass layer on the ingot remains constant, wherein the fused silica ingot is free of bubbles, layers, inclusions, and cords over the edge length of the rod lens.