Browse Prior Art Database

Protective Shield for Laser Lens

IP.com Disclosure Number: IPCOM000074210D
Original Publication Date: 1971-Mar-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 23K

Publishing Venue

IBM

Related People

Kawecki, RJ: AUTHOR

Abstract

The objective lens of a laser welding or drilling tool may be damaged by particles sputtered from the material being drilled. A shield provides protection for the lens with minimal energy loss and no down time to replace the shield when it becomes damaged.

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Protective Shield for Laser Lens

The objective lens of a laser welding or drilling tool may be damaged by particles sputtered from the material being drilled. A shield provides protection for the lens with minimal energy loss and no down time to replace the shield when it becomes damaged.

Laser 1 scribes material 2 which sputters particles that may pit lens 3. To protect the lens, film 4 is placed between the lens 3 and material 2. The film is transparent to the radiation of the laser. For example, it may be TEFLON* if the laser radiation is in the infrared region.

The film is preferably rolled on reels 5 which may be mounted to the laser assembly by arms 6. When one section of the transparent film is damaged it is easily replaced by moving another section across the face of lens 3. The replacement may be accomplished automatically after each laser cycle. * Trademark of E. I. du Pont de Nemours & Co.

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