| 摘要 |
PROBLEM TO BE SOLVED: To provide a laser device where the non-uniformity of intensity distribution is reduced at the time of the amplifying laser light. SOLUTION: When the magnification of an image forming optical system 15n in a final stage or a stage before it is set to be mx , the exciting area of a laser amplifier 14n in the final stage of a stage before it is set to be dx , the bore of laser light which is made incident on the laser amplifier to be Dx and an outgoing bore to beϕx , expressions dx .mx >ϕx ...(I) Dx >dx ...(II) Dx .mx =ϕx (III) are all satisfied. Thus, the magnification of the final stage or the stage before it can be reduced and non-uniformity by fresnel diffraction can be reduced. |
