Electric heating – Metal heating – By arc
Patent
1996-07-15
1998-11-17
Mills, Gregory
Electric heating
Metal heating
By arc
2191216, 21912175, 21912179, 347259, B23K 2608
Patent
active
058379622
ABSTRACT:
By adding an acousto-optic deflector to an existing design of laser marker the laser marker's throughput is increased by a large factor, typically a factor of 5. Galvanometer driven mirrors, which in existing laser markers are used to trace out the strokes in characters are, in this invention, used only to scan smoothly along lines of characters. The acousto-optic deflector, being much faster than the galvanometers, is used to trace out the individual strokes in the characters. Marking rates of 1000 characters per second are achieved in the case of characters for which capital letters are 2 millimeters high and a 2 millimeter long stroke contains 13 laser-produced craters. This performance is achieved over fields as large as 300 millimeters square. The quality of marked characters is improved because the deleterious effects of mirror inertia on character quality, commonly seen when a laser marker is pushed for speed, are eliminated.
REFERENCES:
patent: 3746427 (1973-07-01), Foster
patent: 3962688 (1976-06-01), Westerberg
patent: 4164717 (1979-08-01), Blazey
patent: 4180822 (1979-12-01), Hudson et al.
patent: 4193087 (1980-03-01), Altman
patent: 4272151 (1981-06-01), Balasubramanian
patent: 4401886 (1983-08-01), Pond et al.
patent: 4532402 (1985-07-01), Overbeck
patent: 4725709 (1988-02-01), Mattelin
patent: 4872746 (1989-10-01), Kobayashi
patent: 5110195 (1992-05-01), Loney
patent: 5121247 (1992-06-01), Fujita et al.
patent: 5268554 (1993-12-01), Ream
patent: 5274492 (1993-12-01), Razzaghi
patent: 5416298 (1995-05-01), Roberts
patent: 5430509 (1995-07-01), Kobayashi
patent: 5653900 (1997-08-01), Clement et al.
Design and Fabrication of Acousto-Optic Devices, Ed. Goutoulis, A.P. et al. 1994, Marcel Dekker, NY.
Optical Scanning, Ed. Marshall, G.F., 1991,Marcel Dekker, NY.
Letter from Arthur French to Julia P. Farrell, Mar. 22,1996.
"Using Laser to Mark Identification Data on Silicon Wafers",by James H. Scaroni, Microelectronics Manufacturing & Testing Magazine, Apr. 1982.
"Ray Marker" data sheet, International Laser Machines Corporation, No Date Available.
"LightWriter XL and XLe", data sheet, Lumonics Marking Corp., No Date Available.
LandOfFree
Faster laser marker employing acousto-optic deflection does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Faster laser marker employing acousto-optic deflection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Faster laser marker employing acousto-optic deflection will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-886450