Patent ID: 6046463
Filing Date: 2000-04-04
Classification: G01B,G01N

Abstract:
An apparatus for measurement and control of a concentration of a treatment deposited on a surface of a glass substrate to form a treated glass, wherein the treatment forms a non-uniform reticulated surface distribution on the surface of the glass substrate such that radiation emitted onto the treated glass is in part reflected by the treatment and in part reflected by the glass substrate, the apparatus comprising:a plinth for positioning the treated glass;a head for contact with the treated glass;emitter means in the head for emitting radiation onto the treated glass that is polarized linearly in a plane parallel to an incident plane of the radiation such that, when the head is in contact with the treated glass, some of the polarized radiation is reflected by the treatment and some of the polarized radiation is incident to the glass substrate at an angle that results in nil reflection due to the glass substrate;receiver means in the head for receiving the radiation reflected by the treatment and for determining and recording the concentration of the treatment based upon the quantity of radiation reflected by the treatment only; andprocessing means for processing signals from the receiver means and for controlling the treatment deposited on the surface of the glass substrate based upon the concentration determined by the receiver means.