Profiling of a component having reduced sensitivity to anomalous off-axis reflections

A system for high-precision optical scanning having attenuated rotational mirror vibration comprising:

• a source of light that emits light;
• a light-sensitive sensor;
• a lens used to focus an image onto said sensor;
• and
• a rotatable polygon mirror system that re-directs the light emitted from said source of light to a plurality of locations of an external surface of a component, the rotatable polygon mirror system comprising:
• a shaft;
• at least two standoffs affixed to the shaft, each standoff comprising:
• a number of flats around the perimeter of the standoff;
• and
• tangs that extend outwardly from the corresponding standoff;
• and
• a plurality of mirrors respectively contacting a corresponding number of the flats, said plurality of mirrors positioned substantially concentrically surrounding the shaft, wherein the number of flats per standoff correspond to the number of mirrors;
• wherein the tangs contact portions of the outside reflecting mirror surfaces of the plurality of mirrors so as to restrict the location of the outside reflecting mirror surfaces to pre-aligned planes during rotation of the polygon mirror system.

A system for optical scanning having improved eye safety provisions comprising:

• a source of light that emits light;
• a light-sensitive sensor;
• a lens used to focus an image onto said sensor;
• a rotatable polygon mirror system that re-directs the light emitted from said source of light to a plurality of locations of an external surface of a component, the rotatable polygon mirror system comprising a plurality of mirrors rotatable around a shaft;
• at least two reflective object sensors directed toward the central longitudinal axis of the shaft, each reflective object sensor comprising:
• an object sensor light source;
• a photo-detector positioned adjacent to the object sensor light source;
• a power control circuit capable of controlling the power of the source of light;
• wherein each reflective object sensor produces an output signal only when the axis of the reflective object sensor is substantially normal to the mirror surface closest to the reflective object sensor, the output signal of the at least two reflective object sensors forming a substantially constant pulse stream as the rotatable polygon mirror system rotates;
• and
• wherein the power control circuit shuts off or decreases the power to the source of light when the reflective object sensors detect the frequency of pulses in the pulse stream occurring below a predetermined threshold.