The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 10, 2009
Filed:
Dec. 04, 2003
Fumitsugu Fukuyo, Hamamatsu, JP;
Kenshi Fukumitsu, Hamamatsu, JP;
Tetsuya Osajima, Hamamatsu, JP;
Hamamatsu Photonics K.K., Hamamastsu-shi, Shizuoka, JP;
Abstract
A laser processing apparatus which can suppress the positional fluctuation in light-converging point of laser light during laser processing is provided. On an optical path of laser light Lconnecting a beam expanderand a first light-transmitting holeof a lens holderto each other in a laser processing apparatus, a stop memberincluding a second light-transmitting holehaving the same diameter as that of the first light-transmitting holeis disposed. Hence, the amount of laser light Lcut by the surrounding part of the first light-transmitting holecan substantially be eliminated, whereby the lens holdercan be prevented from being heated upon irradiation with the laser light L. Also, even when the stop memberis heated by the laser light Lcut by the surrounding part of the second light-transmitting hole, heat is prevented from being transmitted from the stop memberto the lens holder, since the stop memberis separated from the lens holder. Therefore, the positional fluctuation in light-converging point Pof the laser light Lduring laser processing can be suppressed to a low level.