Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

PLASTIC LIGHT SHIELD FOR FLASH LAMP

IP.com Disclosure Number: IPCOM000024968D
Original Publication Date: 1983-Feb-28
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 57K

Publishing Venue

Xerox Disclosure Journal

Abstract

Flash illumination systems used in photocopiers produce intense irradiance levels which must be shielded in some manner to protect an operator. The figure shows a portion of an enclosed optical housing 10 wherein a document placed on a platen 12 is illuminated by light emanating from flash lamp 14, the light reflecting from the floor and walls of the housing. To protect an operator from direct illumination from lamp 14, a plastic light shield 16 is positioned above the lamps. Shield 16 comprises a polyolefin polymer substrate doped with a concentration of titanium dioxide. This combination of materials provided an opacity sufficient to block direct illumination from the lamps while permitting adequate visible light trans-mission and reflection characteristics to illuminate the document.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

PLASTIC LIGHT SHIELD FOR
FLASH LAMP
Randie G. Murdock

iiobert M. Lukasik

Flash illumination systems used in photocopiers produce intense irradiance levels which must be shielded in some manner to protect an operator. The figure shows a portion of an enclosed optical housing 10 wherein a document placed on a platen 12 is illuminated by light emanating from flash lamp 14, the light reflecting from the floor and walls of the housing. To protect an operator from direct illumination from lamp 14, a plastic light shield 16 is positioned above the lamps. Shield 16 comprises a polyolefin polymer substrate doped with a concentration of titanium dioxide. This combination of materials provided an opacity sufficient to block direct illumination from the lamps while permitting adequate visible light trans- mission and reflection characteristics to illuminate the document.

Volume 8 Number 1 January/February 1983 55

Proposed Classification
U.S. Cl. 355/67 Int. C1. G03b 27/54

[This page contains 1 picture or other non-text object]

Page 2 of 2

56

   XEROX DISCLOSURE JOURNAL Volume 8 Number 1 January/February 1983

[This page contains 1 picture or other non-text object]