Laser irradiation apparatus
AssigneePanasonic Corporation
InventorTakeshi Nishida
Life of this patent
Estimating the term…
Abstract
The laser radiation apparatus is provided having substantial light emission intensity although the laser radiation apparatus is miniaturized. A solid state laser rod; the excitation light source formed such that the excitation light source surrounds an emission axis in a section perpendicular with respect to the emission axis of laser light of the solid state laser rod; and a lens barrel placed so that the lens barrel surrounds the excitation light source and condenses light from the excitation light source to the solid state laser rod. Excitation light reflected upon inner surface of the lens barrel is radiated uniformly over the lateral surface of the laser rod so that laser active medium is efficiently excited, and energy conversion rate is improved.
Claims20
A laser radiation apparatus comprising:
- a solid state laser rod;
- an excitation light source surrounding an emission axis of laser light of the solid state laser rod on a cross sectional plane perpendicular with respect to the emission axis;
- and
- a lens barrel that is positioned such that the lens barrel encloses the excitation light source and condenses light from the excitation light source to the solid state laser rod, the lens barrel having an ellipsoid shape, a minor axis of the ellipsoid coinciding with the emission axis of the laser light.
A laser radiation apparatus comprising:
- a solid state laser rod;
- an excitation light source surrounding an emission axis of laser light of the solid state laser rod on a cross sectional plane perpendicular with respect to the emission axis;
- and
- a lens barrel that is positioned such that the lens barrel encloses the excitation light source and condenses light from the excitation light source to the solid state laser rod, every cross sectional plane of the lens barrel including the emission axis has a shape of two overlapping ellipses and the two ellipses each have two foci and share one of the two foci with each other;
- the emission axis of the solid state laser rod and the shared focus meet;
- and
- the excitation light source is positioned inside the lens barrel along a path of the other focus.
Dependencies are inferred from the claim text.