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US5988502A Electro-optical scanner having selectable scan pattern 失效
具有可选扫描图案的电光扫描器

Electro-optical scanner having selectable scan pattern
摘要:
A wavelength selector in an optical scanner is operative for selecting a first laser beam having a predetermined wavelength to produce a first scan pattern, and for selecting a second laser beam having a different wavelength to produce a second scan pattern. The scan patterns have a different number of scan lines. The selected scan pattern is scanned over indicia, e.g., a bar code symbol, to be read.
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