Browse Prior Art Database

Heat Sinking of Optically Filtered Illumination Systems

IP.com Disclosure Number: IPCOM000046021D
Original Publication Date: 1983-May-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Bullock, MK: AUTHOR

Abstract

Incandescent lamp 10 is located on the focal axis of an elliptical reflector 11 which directs the light to the opposite focal axis of the ellipse for illuminating a line region of a document 12. Dichroic mirror 13 reflects infrared heat energy but passes visible light to the document 12. A heat sink 14 is located at the reflected focus 15 of the infrared energy to absorb and conduct away this energy before it has the opportunity to be re-reflected by reflector 11.

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Heat Sinking of Optically Filtered Illumination Systems

Incandescent lamp 10 is located on the focal axis of an elliptical reflector 11 which directs the light to the opposite focal axis of the ellipse for illuminating a line region of a document 12. Dichroic mirror 13 reflects infrared heat energy but passes visible light to the document 12. A heat sink 14 is located at the reflected focus 15 of the infrared energy to absorb and conduct away this energy before it has the opportunity to be re-reflected by reflector 11.

Alternately, dichroic mirror 13 can be located to focus the reflected infrared energy on an opening in the reflector 11, thereby also removing the infrared energy from the optical system.

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