Method of treating the surface of a glass member

A method of treating a glass member intended to abut a transparent element for disrupting the light interference fringes formed therebetween, comprising the steps of:

• grinding the surface of the glass member intended to abut the transparent element with a grinding powder of substantially 22.5 microns to form a multiplicity of alternating peaks and valleys, said peaks and valleys permitting nondetectable light interference fringes to form within said valleys when said transparent element contacts said peaks;
• bathing said surface with an aqueous solution having a temperature range of between substantially 70.degree. and 75.degree. F. and containing between substantially 41.3% and 45.7% by volume of sulfuric acid and between substantially 54.3% and 58.7% by volume of hydrofluoric acid for a time period of between substantially 105 and 135 seconds for polishing said peaks and valleys until said glass member is about 90% light transmissive;
• and
• washing said glass member with a liquid having a temperature range of between substantially 45.degree. and 55.degree. F. for preventing further reaction between said aqueous solution and said surface.