Momentum Optics is commercializing a new laser-chemical machining process. The technology is based on two innovations. First, they use a laser to heat a chemical etchant and accelerate a reaction with a glass workpiece. Laser-chemical machining removes material without making physical contact with the glass. As a result, surfaces have exceptionally low roughness (<1nm RMS with fused silica) and, due to the diffusion of heat, there is no detectable tool imprint or mid-spatial frequency error. Second, an in-tool sensor capable of nanometer resolution provides real-time surface measurements. They use the sensor for closed-loop feedback control of the laser enabling high machining precision and fast material removal. The technology was recently a finalist for a SPIE 2026 Prism Award.