Monogon laser scanner with no line wobble

A new optical scanner is described which serves as a monogon, or single-facet device, providing one scan per shaft rotation. It cancels cross-scan line placement errors automatically, yielding scan lines which are spaced precisely, independent of drive shaft wobble. This scanner is configured for simple fabrication, of low mass and size, allowing convenient dynamic balance for high-speed operation. This new scanner is identified as an open-mirror monogon.