Beam homogenizer and laser irradiation apparatus

Details Beam homogenizer and laser irradiation apparatus Beam homogenizer and laser irradiation apparatus

2006-03-29

2009-02-03

Harrington, Alicia M (Department: 2873)

Optical: systems and elements

Single channel simultaneously to or from plural channels

By surface composed of lenticular elements

Reexamination Certificate

active

07486444

ABSTRACT:
The present invention provides a beam homogenizer for homogenizing energy distribution by making the distance between lenses small to shorten the optical path length with the use of an array lens of an optical path shortened type, and a laser irradiation apparatus using the beam homogenizer. The beam homogenizer is equipped with a front side array lens of an optical path shortened type whose second principal point is positioned ahead on a beam incidence side, a back side array lens of an optical path shortened type whose first principal point is positioned behind on a beam emission side, and a condensing lens, wherein the distance between the second principal point of the front side array lens and the first principal point of the back side array lens is equal to the focal length of the back side array lens.

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Search Report (Application No. 06006435.9) Dated Aug. 17, 2006.

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