JPS58169763U

JPS58169763U - Scanner for modified exposure

Info

Publication number: JPS58169763U
Application number: JP1982065459U
Authority: JP
Inventors: 健司鈴木
Original assignee: 大日本印刷株式会社
Priority date: 1982-05-07
Filing date: 1982-05-07
Publication date: 1983-11-12

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

−第１図は本考案による変形露光用スキャナーの一実施
例を示すブロック図、第２図はクロック発生器とクロッ
ク制御回路の一実施例を示すブロック図、第３図、第４
図、第５図それに第６図はいずれも第１図の実施例の動
作を示す説明図である。１・・・・・・読取走査ドラム、２・・・・・・露光走
査ドラム、１５・・・・・・クロック発生器、１６・・
・・・・クロック制御回路、１５４，１５６・・・・・
・パルス周波数変調回路、１６０．１６２・・・・・・
任意関数発生器。- Fig. 1 is a block diagram showing an embodiment of the modified exposure scanner according to the present invention; Fig. 2 is a block diagram showing an embodiment of the clock generator and clock control circuit; Figs. 3 and 4;
, FIG. 5, and FIG. 6 are all explanatory diagrams showing the operation of the embodiment of FIG. 1. 1... Reading scanning drum, 2... Exposure scanning drum, 15... Clock generator, 16...
...Clock control circuit, 154, 156...
・Pulse frequency modulation circuit, 160.162...
Arbitrary function generator.

Claims

[Scope of utility model registration request]

(1) In a printing plate making scanner equipped with an image signal memory and capable of independently reading the image signal and exposing it, at least one of the shape and size of the pixel is changed when reading the image signal and when exposing the image signal. 1. A scanner for modified exposure, comprising a pixel conversion means for arbitrarily changing pixels within one image plane, and configured to perform modified exposure of a document pattern.

(2) Utility model registration In claim 1, the pixel conversion means includes a first pulse frequency modulation circuit whose modulation input is an arbitrary function signal whose period is a main scanning period, and whose period is a sub-scanning period. It consists of at least one of a second pulse frequency modulation circuit which receives an arbitrary function signal as a modulation input, and all image signals are modulated by the output of the first pulse frequency modulation circuit.
A scanner for modified exposure, characterized in that it is configured to perform sampling and to advance the head of the scanner using the output of the second pulse frequency modulation circuit.