| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an optical apparatus which suppresses, at a low cost, variations in focal positions of the light beams which are emitted from respective ports of a lens array to be condensed by a common lens. <P>SOLUTION: In an optical apparatus of the present invention, the lens thicknesses and curvature radiuses of respective first lenses 13 are optimized so that beam waist positions of light beams emitted from the respective first lenses 13 of the lens array 1 are independently changed according to aberration of a second lens 3, and the focal position deviation due to the aberration of the second lens 3 is canceled by a difference between the beam waist positions, which is given on the lens array 1 side. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
