spec-shield is a curvature adjustable face shield that tackles undesirable reflections and can be mounted on spectacles.

The curvature of the face shield is modelled as a parabola with a fixed arc length between the mounting points.

The entire design space is explored for curves that prevent undesirable reflections and optimal design variables are chosen.

• Width of frame, 2*fw = 67.5mm
• Mounting offset, fh = 20mm
• Mounting point (x), mx = 10mm to 30mm
• Mounting point (y), my = 15mm

• Layer height = 0.12mm
• Nozzle diameter = 0.4mm
• Infill = 100%

G-codes can be found here: gcodes

This is merely a working prototype and contributions are welcome.