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Photothermal Device with Low Temperature Infrared Photon Recycling

IP.com Disclosure Number: IPCOM000084736D
Original Publication Date: 1975-Dec-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Cuomo, JJ: AUTHOR [+4]

Abstract

Dendritic tungsten photothermal devices (e.g., Applied Physics Letters, Vol. 76, No. 10, May 1975) have energy loss through the reemission of infrared radiation within a cone angle of about 36 degrees. A structure is described herein which reflects this radiation back into the tungsten surface with a reflecting substance which is not in contact with the tungsten.

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Photothermal Device with Low Temperature Infrared Photon Recycling

Dendritic tungsten photothermal devices (e.g., Applied Physics Letters, Vol. 76, No. 10, May 1975) have energy loss through the reemission of infrared radiation within a cone angle of about 36 degrees. A structure is described herein which reflects this radiation back into the tungsten surface with a reflecting substance which is not in contact with the tungsten.

The reemitted radiation can be captured with infrared reflecting substances such as thin-metal films or films of SnInO(x) which are not in close proximity to the solar energy absorbing surface. With black body absorbers, the infrared reflectors have to be placed in close proximity in order to recapture efficiently the infrared radiation. This usually results in excessive heating of the reflector which degrades its reflecting properties. However, with the dendrite tungsten device, this reflecting device can be more remote and hence less susceptible to undesirable heating effects, and yet still recapture efficiently the infrared radiation.

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