MARKING METHOD FOR PHOTOSENSITIVE MATERIAL

PROBLEM TO BE SOLVED: To provide a method for printing by uniform dots of a laser beam and also printing safely and clearly without accompanying the deformation and quality change of a film image surface caused by the relation between the size of pulse width and energy density. SOLUTION: One laser b...

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Bibliographische Detailangaben
Hauptverfasser:	NAKAMURA MASAO, HAMAZAKI MASAHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	CORRECTION OF TYPOGRAPHICAL ERRORS i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES PERFORMING OPERATIONS PRINTING SELECTIVE PRINTING MECHANISMS STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for printing by uniform dots of a laser beam and also printing safely and clearly without accompanying the deformation and quality change of a film image surface caused by the relation between the size of pulse width and energy density. SOLUTION: One laser beam source or each one of a plurality of laser beam sources are ON/OFF driven independently, and the laser beams from respective sources are emitted on a photosensitive material under the conditions that the relation between energy density E (unit: w/cm ) and pulse width S (unit: second) is not in an area encircled by the following equations by which dots of almost circular shape are formed at the given intervals and printing is carried out. The equations are: logE=klogS+m1 , logE=klogS+m2 , logS=log3-5, and logS=log2-4 where, k=-0.46, m1 =3.68, and m2 =2.92.