Coherent light generators – Particular resonant cavity – Specified output coupling device
Patent
1991-10-31
1993-11-09
Bovernick, Rodney B.
Coherent light generators
Particular resonant cavity
Specified output coupling device
H01S 308
Patent
active
052609650
ABSTRACT:
In a laser processing apparatus according to the present invention, an aberration compensating device is provided between a beam forming section and a half mirror. The compensating device makes a focal point of visible light used as reference light during observation and a focal point of infrared laser light used during processing coincide with each other. In one embodiment of the aberration correcting device includes an aberration correcting convex lens having long focal length and a space portion provided in a rotatable lens holder. When observing an object to be processed, the lens holder is rotated to bring the space portion into an optical path. During processing, the lens holder is rotated to bring the convex lens for correction into the optical path, e.g. when emitting the laser beam. The laser beam is converged until incidence on the objective lens by the convex correcting lens to correct the aberration. As the aberration compensating device, a combination of a concave lens and a convex lens having different refractive indexes and the same focal length may also be employed. Otherwise, a concave lens may be provided to make a beam waist of the laser beam coincide with the portion to be processed.
REFERENCES:
patent: 4769530 (1988-09-01), Miyahara
Kobayashi Tomoshige
Nakazeki Tsugito
Bovernick Rodney B.
NTN Corporation
Wise Robert E.
LandOfFree
Laser processing apparatus and laser processing method 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 apparatus and laser processing method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser processing apparatus and laser processing method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1148622