Multiple laser beam scanner with beam intensity control

摘要: A semiconductor laser beam scanning device includes a plurality of lasers for emitting respective beams which are combined into single to scan desired surface. The amount energy the is detected by detector applies signal drive/control circuit. Alternatively, applied comparator compares with reference and issues difference control circuit connected drive or responsive controllably energizing at least one emitted therefrom thereby keep constant level. may be disposed adjacent surface scanned detecting in each cycle, detect divided from splitter on path beam.