Scanning type image recorder

Abstract

Abstract PURPOSE: To eliminate the thinning-down of image and achieve the improvement in the image quality of characters by changing the width of the image signal in an apparatus of a system by which nonexposed parts are visualized. CONSTITUTION: A character code signal is applied to a terminal 1, from which it is inputted as the series signal of a signal line 9 into a processing circuit 10, by which it is inverted to an inverted signal 501. This signal is further applied as the signal 502 of an expanded pulse width Δt to a beam modulator 53. Here, if the visualizing level is defined as 504 when the inverted signal 501 is used straightly as a modulating signal, a width 505 is obtained. When the signal 502 is used as a modulating signal, the position where a scanning spot is produced moves from 511 to 512 and therefore, the exposure distribution becomes as shown by solid lines in 504 and the width to be visualized becomes 506. If the scanning speed of the scanning spot is defined as Vs, the length of the segment extends by Vs.Δt. Because of this, the thinning-down of the images may be eliminated and the image quality may be improved. COPYRIGHT: (C)1981,JPO&Japio

Inventors

• 👤 Koichi Sakugi

Bibliographic Details