Electro-optic pulse imaging raster output scanner

US4639073A · kind A · utility

Assignee

• Xerox Corporation · US

Inventors

• Kwok L. Yip · Webster, US
• Mehdi N. Araghi · Webster, US
• Joseph J. Daniele · Pittsford, US
• Martin E. Banton · Fairport, US
• Charles J. Kramer · Pittsford, US
• Joachim Ritter · Herzogenaurach, DE

Key dates

• Filing date: Mar 19, 1984
• Grant date: Jan 27, 1987
• Expiry date: Mar 19, 2004

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N1/036
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A raster output scanner having a recording member, a laser, a total internal reflection type modulator having an array of independently addressable electrodes, optical means cooperable with the laser to provide a sheetlike beam of high intensity radiation at the modulator, the array of electrodes being pulsed in succession with each image pixel to provide wave after wave of imaging or non-imaging beams, a scanning polygon for scanning the imaging beams from the modulator across the recording member line by line, and means for pulsing the modulator electrodes at a speed equal to the speed of the scanning polygon and in a direction opposite to the polygon scanning direction to obviate image blur.