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Mirror alignment is less critical in a laser-energized virtual scanning arrangement when the mirror is formed with closely spaced vee grooves each with a controlled interior angle of ninety degrees.
English (United States)
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Vee-Grooved Virtual Scanning Mirror
Mirror alignment is less critical in a laser-energized virtual scanning
arrangement when the mirror is formed with closely spaced vee grooves each
with a controlled interior angle of ninety degrees.
In Fig. 1, mirror 1 has a plurality of closely spaced, parallel, vee-shaped
grooves 2. Direct light beam 3 from a source, not shown, impinges on groove
surfaces and is reflected parallel to itself along the same scanning plane when
the interior angle of the vee is a right angle. The grooved mirror surface renders
alignment less critical in a scanning application, as illustrated in Fig. 2. The mirror
grooves can be metallized or used with total internal reflection.
A scanner arrangement is shown in Fig. 3 where parallel grooved mirror 1
reflects direct beam 3 from laser 4 and scanner 5 onto retro-reflective material 6.