Beam scanning based on two-dimensional polygon scanner having a designated facet for blanking operation for display and other applications

摘要

Scanning beam systems based on a two-dimensional polygon scanner with different reflective polygon facets tilted at different tilt facet angles to use rotations of the polygon scanner to scan one or more optical beams both horizontally and vertically on a surface which can be a display screen or a printing surface.

主权项

1. A scanning beam display system, comprising:
a display screen responsive to excitation light of an optical excitation wavelength to emit visible light of colors at optical wavelengths different from the optical excitation wavelength to display image information carried by the excitation light; an optical module operable to produce a plurality of optical beams of the excitation light modulated to carry the image information to scan over the display screen to produce the images based on a two dimensional scanning pattern along horizontal and vertical directions, the optical module including a polygon scanner positioned in optical paths of the optical beams and comprising a plurality of polygon facets and a rotation axis around which the polygon scanner rotates to scan the optical beams both horizontally and vertically on the display screen for displaying the images, wherein the plurality of polygon facets are sized to simultaneously receive the optical beams and are tilted with respect to the rotation axis at different facet tilt angles, respectively, to reflect incident light to the display screen at different vertical positions on the display screen, respectively, and the plurality of polygon facets include one special polygon facet that is longer in dimension along the horizontal direction than other polygon facets to include an extended blanking region at one end that does not reflect light onto the display screen during image displaying.