Multibeam laser recording method capable of adjusting light intensity and apparatus for the same

Abstract

Abstract PURPOSE: To indirectly measure each primary light and readily unify the intensity of the primary light being radiated onto a photoreceptor to the same intensity by making use of the zero order light which has hitherto been cut as unnecessary and observing the photoelectrically converted signal spectra thereof. CONSTITUTION: Prior to recording, (n) kinds of testing signls of fk 1 ... in frequency and respectively and equal voltage are applied from a testing signal oscillator 8 to an AM modulator AM 1 ..., which in turn modulate these with carriers f 1 ... of mutually different frequencies and output testing modulation signals P 1 ... The signals P 1 ... are respectively gain-controlled with gain controllers GC 1 ... to provide final testing modulation signals Q 1 ..., which are then combined to one signal with a mixer 6. The combined signal is then amplified with AMP and is inputted to an AO element 1. The respective waveforms W 1 ... of the non-unified light intensities of the zero order light L 0 for the primary light L 1 ... emitted in correspond ence to the signal Q 1 ... are observed with a spectrum analyzer 11. And the gains of the gain controllers GC 1 ... corresponding to the respective waveforms are controlled while the image plane 12 is being observed, whereby these are so controlled that all waveform intensities become constant. COPYRIGHT: (C)1979,JPO&Japio

Inventors

• 👤 Masaaki Mori

Bibliographic Details