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AIR DEFLECTOR SLIT AND STRAY LIGHT ABSORBER IN A RASTER OUTPUT SCANNER

IP.com Disclosure Number: IPCOM000025890D
Original Publication Date: 1988-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 53K

Publishing Venue

Xerox Disclosure Journal

Abstract

Referring to the drawing Figure, the polygon of a raster output scanner rotates at a very high RPM, i.e., 22,000 RPM. At that speed, the polygon acts as a blower impeller, blowing air through the laser opening in the polygon housing 1 toward the scanner optical system and lens 5. As a result, contaminates borne by the air can deposit on the lens.

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AIR DEFLECTOR SLIT AND STRAY LIGHT ABSORBER IN A RASTER OUTPUT SCANNER
Edward P. deJong

Proposed Classification

U.S. C1.3581285 Int. C1. H04n 1/40

Referring to the drawing Figure, the polygon of a raster output scanner rotates at a very high RPM, i.e., 22,000 RPM. At that speed, the polygon acts as a blower impeller, blowing air through the laser opening in the polygon housing 1 toward the scanner optical system and lens 5. As a result, contaminates borne by the air can deposit on the lens.

To obviate this problem, it is proposed that a block 6 having a slit 7 therethrough for the passage of the scanner beam be placed between polygon housing 1 and lens 5 to restrict the flow of air toward the scanner optical system and lens 5. The face of block 6 is provided with a suitable non- reflective coating 8 to absorb stray light such as flare, satellite beams, etc.

Volume 13 Number 5 September/October 1988 277

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278

     XEROX DISCLOSURE JOURNAL Volume 13 Number 5 September/October 1988

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