Job Description:

• 1) Etches numerals and graduation lines on prisms and other optical glass surfaces for use in optical instruments, using pantograph engraver: Mounts glass specimens in holder.

• 2) Dips glass elements in molten wax to obtain uniform protective coating.

• 3) Positions tracing stylus of pantograph on template and guides stylus around template.

• 4) Inscribes pattern of lines and numerals on elements in wax coating with needle which is affixed to pantograph arm.

• 5) Exposes glass to hydrofluoric acid fumes to etch pattern.

• 6) Cleans glass with water and solvents.

• 7) Fills etched characters with opaque paste to improve readability.

• 8) Inspects etched work for uniformity, using calibrated microscope.