Apparatus for diagonal progressive scanning video and method of improving aiming visibility, reducing tilt dependence and improving read range
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United States of America Patent
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Aug 5, 2008
Grant Date -
Apr 13, 2006
app pub date -
Aug 30, 2005
filing date -
Aug 30, 2004
priority date (Note) -
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Abstract
A laser scanner with a 2D resonant electrostatic micro-mirror has improved aiming visibility, reduced tilt dependence and improved read range. The laser scanner has a field of view that defines a 3D volume and utilizes a laser beam in a light path that is thin relative to the 3D volume. Physical pixel height is enlarged to aid optical imaging plane alignment. A selective filter centered on the lighting wavelength is placed in the image path. The height of the pixel may be artificially induced to be m*w, where m is the lens magnification and w is the light thickness. Diagonal progressive scanning is used to maximize the frequency values so shock resistance of the mirror is increased.
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