| 摘要 |
<p>A laser beam applying apparatus includes a laser beam oscillating unit, a focusing lens, and a diffractive optic element provided between the laser beam oscillating unit and the focusing lens for defining the spot shape of the laser beam oscillated by the laser beam oscillating unit. A zeroth-order light removing unit removes zeroth-order light emerging from the diffractive optic element and leaves first-order light whose spot shape has been defined by the diffractive optic element and the focusing lens. A first prism has an incident surface and an emergent surface inclined with respect to the incident surface. A second prism has a zeroth-order light reflecting surface for reflecting the zeroth-order light and a first-order light emerging surface from which the first-order light emerges. A damper absorbs the zeroth-order light reflected on the zeroth-order light reflecting surface of the second prism.</p> |
