Patent ID: 7863588
Filing Date: 2011-01-04
Classification: G01N,G02B,G03F

Abstract:
1. A lighting optical apparatus, comprising: a deep ultraviolet light source from which a deep ultraviolet ray is emitted; a first double-sided cylindrical lens on which the deep ultraviolet ray emitted from the deep ultraviolet light source is incident, from which the ray is emitted after being split into a plurality of first light fluxes, and which includes a cylindrical lens array on both sides in a configuration in which cylinder axes intersect at right angles; a second double-sided cylindrical lens on which the plurality of first light fluxes emitted from the first double-sided cylindrical lens is incident, from which the fluxes are emitted after directions of the plurality of first light fluxes are aligned as a plurality of second light fluxes, and which includes a cylindrical lens array on both sides in the configuration in which cylinder axes intersect at right angles; and a condenser lens on which the plurality of second light fluxes is incident to superimpose the plurality of second light fluxes, wherein the cylinder axis of the cylindrical lens array on a side of incidence of the first double-sided cylindrical lens and that of the cylindrical lens array on the side of incidence of the second double-sided cylindrical lens are perpendicular.