Electric heating – Metal heating – By arc
Reexamination Certificate
2005-09-20
2005-09-20
Johnson, Jonathan (Department: 1725)
Electric heating
Metal heating
By arc
Reexamination Certificate
active
06946620
ABSTRACT:
In a laser processing apparatus including an ultra-short pulse laser a focusing optical system and processing a work by projecting a beam delivered through the focusing optical system on to the work, the focusing optical system has at least a pair of diffractive surface and a refractive surface, and chromatic aberration is corrected or chromatic aberration and pulse extension are corrected by making use of the diffractive dispersions due to and the diffractive surface the refractive dispersion due to of the refractive surface. With this arrangement, chromatic aberration is corrected or both chromatic aberration and pulse expansion are corrected in the processing with the ultra-short pulse laser and thereby improve the practical use and value of the processing by improving its accuray, qualiy and speed.
REFERENCES:
patent: 4626679 (1986-12-01), Kuwayama et al.
patent: 4896944 (1990-01-01), Irwin et al.
patent: 5161040 (1992-11-01), Yokoyama et al.
patent: 5446565 (1995-08-01), Komma et al.
patent: 5656186 (1997-08-01), Mourou et al.
patent: 6124962 (2000-09-01), Kamikubo
patent: 6466359 (2002-10-01), Sunagawa
patent: 6469831 (2002-10-01), Iizuka
patent: 6483639 (2002-11-01), Fujinoki et al.
patent: 19736110 (1999-03-01), None
patent: 0 679 469 (1995-11-01), None
patent: 5-135420 (1993-06-01), None
patent: A-06-182574 (1994-07-01), None
patent: 8-78319 (1996-03-01), None
patent: A-2001-138083 (2001-05-01), None
Shoji et al., “Photofabrication of a photonic crystal using interference of UV laser”, OSJ/SPIE Conference on Optical Engineering for Sensing and Nanotechnology (ICOSN'99), Yokohama, Japan, Jun. 1999, pp. 541-544.
Momma et al., “Beam delivery of femtosecond laser radiation by diffractive optical elements”, Applied Physics A. Materials Science & Processing (Springer-Verlag 1998) A 67 571-520.
English Translation of German Office Action, dated Mar. 7, 2005.
Amako Jun
Nagasaka Kimio
Nishida Kazuhiro
Johnson Jonathan
Oliff & Berridg,e PLC
Seiko Epson Corporation
LandOfFree
Laser processing method and laser processing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Laser processing method and laser processing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser processing method and laser processing apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3396063