Patent ID: 7982957

Claim:
An optical apparatus using a lens array comprising: a lens array including a fiber array having a plurality of optical fibers and a plurality of first lenses capable of condensing respectively optical beams emitted from said optical fibers; and a condensing section that condenses the optical beams emitted from said respective first lenses of said lens array approximately on one point using a common second lens, wherein said lens array has a structure in which beam waist positions of the optical beams emitted from said respective first lenses are independently changed according to aberration of said second lens, and in said lens array, a distance from an optical emission end face of each of said optical fibers to an optical emission end of each of said first lenses, and a curvature radius of each of said first lenses, are independently set according to a relation between a distance from the center of said second lens and the aberration of said second lens, so that the curvature radius of each of said first lenses has a different value, and distances from the center of said second lens to said respective optical fibers are adjusted according to the aberration of said second lens by changing an arrangement of said respective optical fibers of said fiber array and mounting positions of said respective first lenses.