Browse Prior Art Database

Nonimpact Printer

IP.com Disclosure Number: IPCOM000090903D
Original Publication Date: 1969-Aug-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Chang, DC: AUTHOR [+2]

Abstract

This nonimpact printing system uses a laser light source. It converts binary information to alphanumeric and special characters from a font on a mask onto a recording surface. Light source 1 is a Nd:YAG laser. The laser, when excited, produces beam 2 having a wavelength of 10,600 angstroms A second harmonic generator 3 is included in the laser cavity to frequency double the wavelength to 5300 angstroms at 4. Provision for Q spoiling can be accomplished by inserting electrooptic crystal 5 in generator 3.

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Nonimpact Printer

This nonimpact printing system uses a laser light source. It converts binary information to alphanumeric and special characters from a font on a mask onto a recording surface. Light source 1 is a Nd:YAG laser. The laser, when excited, produces beam 2 having a wavelength of 10,600 angstroms A second harmonic generator 3 is included in the laser cavity to frequency double the wavelength to 5300 angstroms at 4. Provision for Q spoiling can be accomplished by inserting electrooptic crystal 5 in generator 3.

Light deflector 6 operates under electro-optic control to select a desired character from a font on character mask 7. Light deflector 8 similarly acts under electro-optic control to return the character-shaped beam to a common axis at 9. Deflector 8 employs longitudinal electrooptic switches 10 to maintain an an adequate numeric aperture insuring image quality. The electrooptic switches in light deflector 6 are transversely positioned as light beam 4 is collimated. The use of transverse switches reduces the optical loss and also reduces the capacitance of the switches permitting common driving of the corresponding stages in deflectors 6 and 8.

Deflector 8 is of the reflection type. It operates such that a beam, propagated as a set of extraordinary rays, never enters any of the birefringent devices employed for deflecting the light. Thus, any astigmatism in the image of a character, propagated as a set of extraordinary rays, is eliminated.

The bea...